./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/forester-heap/dll-rb-sentinel-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 57096758 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27c4341a-bf93-46b1-838f-cd05a91b086a/bin/utaipan-mTDlp9Zugs/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27c4341a-bf93-46b1-838f-cd05a91b086a/bin/utaipan-mTDlp9Zugs/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27c4341a-bf93-46b1-838f-cd05a91b086a/bin/utaipan-mTDlp9Zugs/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27c4341a-bf93-46b1-838f-cd05a91b086a/bin/utaipan-mTDlp9Zugs/config/TaipanReach.xml -i ../../sv-benchmarks/c/forester-heap/dll-rb-sentinel-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27c4341a-bf93-46b1-838f-cd05a91b086a/bin/utaipan-mTDlp9Zugs/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27c4341a-bf93-46b1-838f-cd05a91b086a/bin/utaipan-mTDlp9Zugs --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 6280f60c5fc83ecad8fef176a397be33dbf47346 ................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27c4341a-bf93-46b1-838f-cd05a91b086a/bin/utaipan-mTDlp9Zugs/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27c4341a-bf93-46b1-838f-cd05a91b086a/bin/utaipan-mTDlp9Zugs/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27c4341a-bf93-46b1-838f-cd05a91b086a/bin/utaipan-mTDlp9Zugs/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27c4341a-bf93-46b1-838f-cd05a91b086a/bin/utaipan-mTDlp9Zugs/config/TaipanReach.xml -i ../../sv-benchmarks/c/forester-heap/dll-rb-sentinel-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27c4341a-bf93-46b1-838f-cd05a91b086a/bin/utaipan-mTDlp9Zugs/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27c4341a-bf93-46b1-838f-cd05a91b086a/bin/utaipan-mTDlp9Zugs --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 6280f60c5fc83ecad8fef176a397be33dbf47346 ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: UNKNOWN --- Real Ultimate output --- This is Ultimate 0.2.1-dev-5709675 [2021-10-16 02:45:26,760 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-16 02:45:26,763 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-16 02:45:26,825 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-16 02:45:26,825 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-16 02:45:26,830 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-16 02:45:26,832 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-16 02:45:26,836 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-16 02:45:26,839 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-16 02:45:26,845 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-16 02:45:26,847 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-16 02:45:26,849 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-16 02:45:26,850 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-16 02:45:26,853 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-16 02:45:26,855 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-16 02:45:26,864 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-16 02:45:26,866 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-16 02:45:26,868 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-16 02:45:26,871 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-16 02:45:26,880 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-16 02:45:26,882 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-16 02:45:26,884 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-16 02:45:26,887 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-16 02:45:26,889 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-16 02:45:26,899 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-16 02:45:26,899 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-16 02:45:26,900 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-16 02:45:26,902 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-16 02:45:26,903 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-16 02:45:26,905 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-16 02:45:26,905 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-16 02:45:26,906 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-16 02:45:26,909 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-16 02:45:26,910 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-16 02:45:26,912 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-16 02:45:26,912 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-16 02:45:26,913 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-16 02:45:26,914 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-16 02:45:26,914 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-16 02:45:26,915 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-16 02:45:26,916 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-16 02:45:26,917 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27c4341a-bf93-46b1-838f-cd05a91b086a/bin/utaipan-mTDlp9Zugs/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-10-16 02:45:26,967 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-16 02:45:26,967 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-16 02:45:26,969 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-16 02:45:26,969 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-16 02:45:26,970 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-16 02:45:26,970 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-16 02:45:26,970 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-10-16 02:45:26,970 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-16 02:45:26,971 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-16 02:45:26,971 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-10-16 02:45:26,972 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-10-16 02:45:26,972 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-16 02:45:26,973 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-10-16 02:45:26,973 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-10-16 02:45:26,973 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-10-16 02:45:26,974 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-16 02:45:26,975 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-16 02:45:26,975 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-16 02:45:26,975 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-16 02:45:26,975 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-16 02:45:26,976 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-16 02:45:26,976 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-16 02:45:26,976 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-16 02:45:26,976 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-16 02:45:26,976 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-16 02:45:26,977 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-16 02:45:26,977 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-16 02:45:26,977 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-16 02:45:26,978 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-16 02:45:26,979 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-16 02:45:26,980 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-16 02:45:26,980 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-16 02:45:26,980 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-16 02:45:26,981 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-16 02:45:26,981 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-10-16 02:45:26,981 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-16 02:45:26,981 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-16 02:45:26,982 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-16 02:45:26,982 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-16 02:45:26,982 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27c4341a-bf93-46b1-838f-cd05a91b086a/bin/utaipan-mTDlp9Zugs/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27c4341a-bf93-46b1-838f-cd05a91b086a/bin/utaipan-mTDlp9Zugs Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6280f60c5fc83ecad8fef176a397be33dbf47346 [2021-10-16 02:45:27,261 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-16 02:45:27,302 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-16 02:45:27,305 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-16 02:45:27,306 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-16 02:45:27,307 INFO L275 PluginConnector]: CDTParser initialized [2021-10-16 02:45:27,308 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27c4341a-bf93-46b1-838f-cd05a91b086a/bin/utaipan-mTDlp9Zugs/../../sv-benchmarks/c/forester-heap/dll-rb-sentinel-2.i [2021-10-16 02:45:27,386 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27c4341a-bf93-46b1-838f-cd05a91b086a/bin/utaipan-mTDlp9Zugs/data/0beb08839/4fa8162459844fa28d3fccd6bad67211/FLAGc45ed299d [2021-10-16 02:45:28,023 INFO L306 CDTParser]: Found 1 translation units. [2021-10-16 02:45:28,025 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27c4341a-bf93-46b1-838f-cd05a91b086a/sv-benchmarks/c/forester-heap/dll-rb-sentinel-2.i [2021-10-16 02:45:28,041 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27c4341a-bf93-46b1-838f-cd05a91b086a/bin/utaipan-mTDlp9Zugs/data/0beb08839/4fa8162459844fa28d3fccd6bad67211/FLAGc45ed299d [2021-10-16 02:45:28,308 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27c4341a-bf93-46b1-838f-cd05a91b086a/bin/utaipan-mTDlp9Zugs/data/0beb08839/4fa8162459844fa28d3fccd6bad67211 [2021-10-16 02:45:28,310 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-16 02:45:28,313 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-16 02:45:28,316 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-16 02:45:28,317 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-16 02:45:28,321 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-16 02:45:28,322 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.10 02:45:28" (1/1) ... [2021-10-16 02:45:28,324 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7d604724 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:45:28, skipping insertion in model container [2021-10-16 02:45:28,324 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.10 02:45:28" (1/1) ... [2021-10-16 02:45:28,333 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-16 02:45:28,377 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-16 02:45:28,774 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27c4341a-bf93-46b1-838f-cd05a91b086a/sv-benchmarks/c/forester-heap/dll-rb-sentinel-2.i[22673,22686] [2021-10-16 02:45:28,778 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27c4341a-bf93-46b1-838f-cd05a91b086a/sv-benchmarks/c/forester-heap/dll-rb-sentinel-2.i[22743,22756] [2021-10-16 02:45:28,779 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27c4341a-bf93-46b1-838f-cd05a91b086a/sv-benchmarks/c/forester-heap/dll-rb-sentinel-2.i[22807,22820] [2021-10-16 02:45:28,780 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27c4341a-bf93-46b1-838f-cd05a91b086a/sv-benchmarks/c/forester-heap/dll-rb-sentinel-2.i[22902,22915] [2021-10-16 02:45:28,781 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27c4341a-bf93-46b1-838f-cd05a91b086a/sv-benchmarks/c/forester-heap/dll-rb-sentinel-2.i[22974,22987] [2021-10-16 02:45:28,783 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27c4341a-bf93-46b1-838f-cd05a91b086a/sv-benchmarks/c/forester-heap/dll-rb-sentinel-2.i[23113,23126] [2021-10-16 02:45:28,784 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27c4341a-bf93-46b1-838f-cd05a91b086a/sv-benchmarks/c/forester-heap/dll-rb-sentinel-2.i[23187,23200] [2021-10-16 02:45:28,790 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-16 02:45:28,799 INFO L203 MainTranslator]: Completed pre-run [2021-10-16 02:45:28,859 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27c4341a-bf93-46b1-838f-cd05a91b086a/sv-benchmarks/c/forester-heap/dll-rb-sentinel-2.i[22673,22686] [2021-10-16 02:45:28,861 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27c4341a-bf93-46b1-838f-cd05a91b086a/sv-benchmarks/c/forester-heap/dll-rb-sentinel-2.i[22743,22756] [2021-10-16 02:45:28,861 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27c4341a-bf93-46b1-838f-cd05a91b086a/sv-benchmarks/c/forester-heap/dll-rb-sentinel-2.i[22807,22820] [2021-10-16 02:45:28,863 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27c4341a-bf93-46b1-838f-cd05a91b086a/sv-benchmarks/c/forester-heap/dll-rb-sentinel-2.i[22902,22915] [2021-10-16 02:45:28,864 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27c4341a-bf93-46b1-838f-cd05a91b086a/sv-benchmarks/c/forester-heap/dll-rb-sentinel-2.i[22974,22987] [2021-10-16 02:45:28,865 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27c4341a-bf93-46b1-838f-cd05a91b086a/sv-benchmarks/c/forester-heap/dll-rb-sentinel-2.i[23113,23126] [2021-10-16 02:45:28,866 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27c4341a-bf93-46b1-838f-cd05a91b086a/sv-benchmarks/c/forester-heap/dll-rb-sentinel-2.i[23187,23200] [2021-10-16 02:45:28,870 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-16 02:45:28,913 INFO L208 MainTranslator]: Completed translation [2021-10-16 02:45:28,913 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:45:28 WrapperNode [2021-10-16 02:45:28,913 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-16 02:45:28,915 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-16 02:45:28,915 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-16 02:45:28,915 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-16 02:45:28,925 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:45:28" (1/1) ... [2021-10-16 02:45:28,941 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:45:28" (1/1) ... [2021-10-16 02:45:28,968 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-16 02:45:28,969 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-16 02:45:28,970 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-16 02:45:28,970 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-16 02:45:28,979 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:45:28" (1/1) ... [2021-10-16 02:45:28,981 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:45:28" (1/1) ... [2021-10-16 02:45:28,987 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:45:28" (1/1) ... [2021-10-16 02:45:28,987 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:45:28" (1/1) ... [2021-10-16 02:45:28,998 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:45:28" (1/1) ... [2021-10-16 02:45:29,004 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:45:28" (1/1) ... [2021-10-16 02:45:29,006 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:45:28" (1/1) ... [2021-10-16 02:45:29,011 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-16 02:45:29,012 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-16 02:45:29,012 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-16 02:45:29,012 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-16 02:45:29,013 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:45:28" (1/1) ... [2021-10-16 02:45:29,021 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-16 02:45:29,035 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27c4341a-bf93-46b1-838f-cd05a91b086a/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 02:45:29,056 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27c4341a-bf93-46b1-838f-cd05a91b086a/bin/utaipan-mTDlp9Zugs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-16 02:45:29,066 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27c4341a-bf93-46b1-838f-cd05a91b086a/bin/utaipan-mTDlp9Zugs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-16 02:45:29,103 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-10-16 02:45:29,103 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-10-16 02:45:29,104 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-10-16 02:45:29,104 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-10-16 02:45:29,104 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-16 02:45:29,104 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-10-16 02:45:29,104 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-16 02:45:29,105 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-16 02:45:29,105 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-16 02:45:29,105 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-16 02:45:30,211 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-16 02:45:30,212 INFO L299 CfgBuilder]: Removed 21 assume(true) statements. [2021-10-16 02:45:30,215 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 02:45:30 BoogieIcfgContainer [2021-10-16 02:45:30,215 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-16 02:45:30,217 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-16 02:45:30,217 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-16 02:45:30,221 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-16 02:45:30,221 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.10 02:45:28" (1/3) ... [2021-10-16 02:45:30,222 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@472b67be and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.10 02:45:30, skipping insertion in model container [2021-10-16 02:45:30,222 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:45:28" (2/3) ... [2021-10-16 02:45:30,223 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@472b67be and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.10 02:45:30, skipping insertion in model container [2021-10-16 02:45:30,223 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 02:45:30" (3/3) ... [2021-10-16 02:45:30,225 INFO L111 eAbstractionObserver]: Analyzing ICFG dll-rb-sentinel-2.i [2021-10-16 02:45:30,231 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-16 02:45:30,231 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 7 error locations. [2021-10-16 02:45:30,284 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-16 02:45:30,291 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=true, mConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, 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 [2021-10-16 02:45:30,291 INFO L340 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2021-10-16 02:45:30,307 INFO L276 IsEmpty]: Start isEmpty. Operand has 41 states, 33 states have (on average 2.0) internal successors, (66), 40 states have internal predecessors, (66), 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) [2021-10-16 02:45:30,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-10-16 02:45:30,313 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:45:30,313 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-10-16 02:45:30,314 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-10-16 02:45:30,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:45:30,320 INFO L82 PathProgramCache]: Analyzing trace with hash 203576989, now seen corresponding path program 1 times [2021-10-16 02:45:30,330 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 02:45:30,331 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1099145301] [2021-10-16 02:45:30,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:45:30,332 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 02:45:30,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:45:30,522 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:45:30,522 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 02:45:30,523 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1099145301] [2021-10-16 02:45:30,524 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1099145301] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 02:45:30,524 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:45:30,524 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-16 02:45:30,527 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [872928530] [2021-10-16 02:45:30,532 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-10-16 02:45:30,533 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 02:45:30,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-10-16 02:45:30,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-16 02:45:30,552 INFO L87 Difference]: Start difference. First operand has 41 states, 33 states have (on average 2.0) internal successors, (66), 40 states have internal predecessors, (66), 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) Second operand has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 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) [2021-10-16 02:45:30,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:45:30,573 INFO L93 Difference]: Finished difference Result 81 states and 131 transitions. [2021-10-16 02:45:30,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-10-16 02:45:30,575 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 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 5 [2021-10-16 02:45:30,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:45:30,585 INFO L225 Difference]: With dead ends: 81 [2021-10-16 02:45:30,585 INFO L226 Difference]: Without dead ends: 39 [2021-10-16 02:45:30,588 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0ms TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-16 02:45:30,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-10-16 02:45:30,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2021-10-16 02:45:30,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 32 states have (on average 1.28125) internal successors, (41), 38 states have internal predecessors, (41), 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) [2021-10-16 02:45:30,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 41 transitions. [2021-10-16 02:45:30,627 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 41 transitions. Word has length 5 [2021-10-16 02:45:30,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:45:30,628 INFO L470 AbstractCegarLoop]: Abstraction has 39 states and 41 transitions. [2021-10-16 02:45:30,628 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 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) [2021-10-16 02:45:30,629 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 41 transitions. [2021-10-16 02:45:30,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-10-16 02:45:30,629 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:45:30,630 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-10-16 02:45:30,630 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-16 02:45:30,631 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-10-16 02:45:30,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:45:30,632 INFO L82 PathProgramCache]: Analyzing trace with hash 1958393091, now seen corresponding path program 1 times [2021-10-16 02:45:30,632 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 02:45:30,633 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [25438997] [2021-10-16 02:45:30,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:45:30,633 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 02:45:30,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:45:30,861 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:45:30,861 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 02:45:30,862 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [25438997] [2021-10-16 02:45:30,862 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [25438997] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 02:45:30,862 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:45:30,862 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-16 02:45:30,863 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [115165372] [2021-10-16 02:45:30,864 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-16 02:45:30,864 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 02:45:30,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-16 02:45:30,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-16 02:45:30,865 INFO L87 Difference]: Start difference. First operand 39 states and 41 transitions. Second operand has 4 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 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) [2021-10-16 02:45:31,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:45:31,396 INFO L93 Difference]: Finished difference Result 39 states and 41 transitions. [2021-10-16 02:45:31,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-16 02:45:31,397 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 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 6 [2021-10-16 02:45:31,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:45:31,398 INFO L225 Difference]: With dead ends: 39 [2021-10-16 02:45:31,399 INFO L226 Difference]: Without dead ends: 37 [2021-10-16 02:45:31,399 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 17.7ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-16 02:45:31,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2021-10-16 02:45:31,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2021-10-16 02:45:31,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 31 states have (on average 1.2580645161290323) internal successors, (39), 36 states have internal predecessors, (39), 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) [2021-10-16 02:45:31,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 39 transitions. [2021-10-16 02:45:31,405 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 39 transitions. Word has length 6 [2021-10-16 02:45:31,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:45:31,406 INFO L470 AbstractCegarLoop]: Abstraction has 37 states and 39 transitions. [2021-10-16 02:45:31,406 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 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) [2021-10-16 02:45:31,406 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 39 transitions. [2021-10-16 02:45:31,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-10-16 02:45:31,407 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:45:31,407 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-10-16 02:45:31,410 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-16 02:45:31,410 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-10-16 02:45:31,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:45:31,412 INFO L82 PathProgramCache]: Analyzing trace with hash 1953024847, now seen corresponding path program 1 times [2021-10-16 02:45:31,413 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 02:45:31,414 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1322095921] [2021-10-16 02:45:31,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:45:31,414 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 02:45:31,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:45:31,507 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:45:31,507 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 02:45:31,508 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1322095921] [2021-10-16 02:45:31,508 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1322095921] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 02:45:31,508 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:45:31,509 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-16 02:45:31,509 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1346063648] [2021-10-16 02:45:31,509 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-16 02:45:31,510 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 02:45:31,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-16 02:45:31,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-16 02:45:31,513 INFO L87 Difference]: Start difference. First operand 37 states and 39 transitions. Second operand has 4 states, 4 states have (on average 1.5) internal successors, (6), 3 states have internal predecessors, (6), 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) [2021-10-16 02:45:31,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:45:31,712 INFO L93 Difference]: Finished difference Result 43 states and 47 transitions. [2021-10-16 02:45:31,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-16 02:45:31,713 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 3 states have internal predecessors, (6), 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 6 [2021-10-16 02:45:31,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:45:31,714 INFO L225 Difference]: With dead ends: 43 [2021-10-16 02:45:31,714 INFO L226 Difference]: Without dead ends: 41 [2021-10-16 02:45:31,715 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 27.6ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-16 02:45:31,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2021-10-16 02:45:31,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 35. [2021-10-16 02:45:31,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 30 states have (on average 1.2333333333333334) internal successors, (37), 34 states have internal predecessors, (37), 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) [2021-10-16 02:45:31,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 37 transitions. [2021-10-16 02:45:31,720 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 37 transitions. Word has length 6 [2021-10-16 02:45:31,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:45:31,721 INFO L470 AbstractCegarLoop]: Abstraction has 35 states and 37 transitions. [2021-10-16 02:45:31,721 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 3 states have internal predecessors, (6), 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) [2021-10-16 02:45:31,721 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 37 transitions. [2021-10-16 02:45:31,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-10-16 02:45:31,722 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:45:31,722 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:45:31,723 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-10-16 02:45:31,723 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-10-16 02:45:31,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:45:31,724 INFO L82 PathProgramCache]: Analyzing trace with hash -343233438, now seen corresponding path program 1 times [2021-10-16 02:45:31,724 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 02:45:31,724 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [921146208] [2021-10-16 02:45:31,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:45:31,725 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 02:45:31,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:45:31,841 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:45:31,841 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 02:45:31,842 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [921146208] [2021-10-16 02:45:31,842 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [921146208] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 02:45:31,842 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:45:31,842 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-16 02:45:31,842 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [285458875] [2021-10-16 02:45:31,843 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-16 02:45:31,843 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 02:45:31,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-16 02:45:31,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-16 02:45:31,844 INFO L87 Difference]: Start difference. First operand 35 states and 37 transitions. Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 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) [2021-10-16 02:45:32,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:45:32,140 INFO L93 Difference]: Finished difference Result 35 states and 37 transitions. [2021-10-16 02:45:32,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-16 02:45:32,140 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 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 9 [2021-10-16 02:45:32,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:45:32,141 INFO L225 Difference]: With dead ends: 35 [2021-10-16 02:45:32,141 INFO L226 Difference]: Without dead ends: 33 [2021-10-16 02:45:32,142 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 28.2ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-16 02:45:32,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-10-16 02:45:32,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2021-10-16 02:45:32,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 29 states have (on average 1.206896551724138) internal successors, (35), 32 states have internal predecessors, (35), 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) [2021-10-16 02:45:32,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 35 transitions. [2021-10-16 02:45:32,147 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 35 transitions. Word has length 9 [2021-10-16 02:45:32,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:45:32,148 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 35 transitions. [2021-10-16 02:45:32,148 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 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) [2021-10-16 02:45:32,148 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 35 transitions. [2021-10-16 02:45:32,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-10-16 02:45:32,149 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:45:32,149 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:45:32,149 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-10-16 02:45:32,150 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-10-16 02:45:32,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:45:32,150 INFO L82 PathProgramCache]: Analyzing trace with hash -1354743889, now seen corresponding path program 1 times [2021-10-16 02:45:32,151 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 02:45:32,151 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [446330309] [2021-10-16 02:45:32,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:45:32,151 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 02:45:32,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:45:32,201 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:45:32,202 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 02:45:32,202 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [446330309] [2021-10-16 02:45:32,202 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [446330309] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 02:45:32,202 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:45:32,203 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-16 02:45:32,203 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1340524260] [2021-10-16 02:45:32,203 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-16 02:45:32,204 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 02:45:32,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-16 02:45:32,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-16 02:45:32,205 INFO L87 Difference]: Start difference. First operand 33 states and 35 transitions. Second operand has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 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) [2021-10-16 02:45:32,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:45:32,919 INFO L93 Difference]: Finished difference Result 58 states and 63 transitions. [2021-10-16 02:45:32,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-16 02:45:32,920 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 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 9 [2021-10-16 02:45:32,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:45:32,921 INFO L225 Difference]: With dead ends: 58 [2021-10-16 02:45:32,921 INFO L226 Difference]: Without dead ends: 56 [2021-10-16 02:45:32,922 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 34.1ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-10-16 02:45:32,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-10-16 02:45:32,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 40. [2021-10-16 02:45:32,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 36 states have (on average 1.1944444444444444) internal successors, (43), 39 states have internal predecessors, (43), 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) [2021-10-16 02:45:32,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 43 transitions. [2021-10-16 02:45:32,930 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 43 transitions. Word has length 9 [2021-10-16 02:45:32,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:45:32,930 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 43 transitions. [2021-10-16 02:45:32,931 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 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) [2021-10-16 02:45:32,931 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 43 transitions. [2021-10-16 02:45:32,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-10-16 02:45:32,932 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:45:32,932 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:45:32,932 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-10-16 02:45:32,932 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-10-16 02:45:32,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:45:32,933 INFO L82 PathProgramCache]: Analyzing trace with hash 865275654, now seen corresponding path program 1 times [2021-10-16 02:45:32,933 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 02:45:32,934 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [33601679] [2021-10-16 02:45:32,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:45:32,934 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 02:45:32,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:45:33,042 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:45:33,043 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 02:45:33,043 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [33601679] [2021-10-16 02:45:33,043 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [33601679] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 02:45:33,043 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:45:33,043 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-16 02:45:33,043 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [613002310] [2021-10-16 02:45:33,044 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-16 02:45:33,044 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 02:45:33,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-16 02:45:33,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-16 02:45:33,045 INFO L87 Difference]: Start difference. First operand 40 states and 43 transitions. Second operand has 4 states, 4 states have (on average 2.75) 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) [2021-10-16 02:45:33,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:45:33,264 INFO L93 Difference]: Finished difference Result 40 states and 43 transitions. [2021-10-16 02:45:33,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-16 02:45:33,266 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) 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 [2021-10-16 02:45:33,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:45:33,267 INFO L225 Difference]: With dead ends: 40 [2021-10-16 02:45:33,267 INFO L226 Difference]: Without dead ends: 38 [2021-10-16 02:45:33,267 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 24.0ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-16 02:45:33,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-10-16 02:45:33,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2021-10-16 02:45:33,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 35 states have (on average 1.1714285714285715) internal successors, (41), 37 states have internal predecessors, (41), 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) [2021-10-16 02:45:33,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 41 transitions. [2021-10-16 02:45:33,273 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 41 transitions. Word has length 11 [2021-10-16 02:45:33,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:45:33,273 INFO L470 AbstractCegarLoop]: Abstraction has 38 states and 41 transitions. [2021-10-16 02:45:33,273 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) 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) [2021-10-16 02:45:33,274 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 41 transitions. [2021-10-16 02:45:33,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-10-16 02:45:33,274 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:45:33,274 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:45:33,275 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-10-16 02:45:33,275 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-10-16 02:45:33,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:45:33,276 INFO L82 PathProgramCache]: Analyzing trace with hash -1743206058, now seen corresponding path program 1 times [2021-10-16 02:45:33,276 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 02:45:33,277 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [442563914] [2021-10-16 02:45:33,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:45:33,277 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 02:45:33,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:45:33,426 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:45:33,427 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 02:45:33,427 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [442563914] [2021-10-16 02:45:33,427 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [442563914] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 02:45:33,427 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:45:33,428 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-10-16 02:45:33,428 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [676805747] [2021-10-16 02:45:33,428 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-16 02:45:33,428 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 02:45:33,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-16 02:45:33,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-16 02:45:33,429 INFO L87 Difference]: Start difference. First operand 38 states and 41 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 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) [2021-10-16 02:45:33,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:45:33,691 INFO L93 Difference]: Finished difference Result 53 states and 58 transitions. [2021-10-16 02:45:33,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-16 02:45:33,692 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 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 [2021-10-16 02:45:33,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:45:33,693 INFO L225 Difference]: With dead ends: 53 [2021-10-16 02:45:33,693 INFO L226 Difference]: Without dead ends: 41 [2021-10-16 02:45:33,693 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 17.2ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-16 02:45:33,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2021-10-16 02:45:33,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 40. [2021-10-16 02:45:33,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 37 states have (on average 1.162162162162162) internal successors, (43), 39 states have internal predecessors, (43), 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) [2021-10-16 02:45:33,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 43 transitions. [2021-10-16 02:45:33,699 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 43 transitions. Word has length 13 [2021-10-16 02:45:33,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:45:33,699 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 43 transitions. [2021-10-16 02:45:33,699 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 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) [2021-10-16 02:45:33,699 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 43 transitions. [2021-10-16 02:45:33,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-10-16 02:45:33,700 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:45:33,700 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:45:33,701 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-10-16 02:45:33,701 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-10-16 02:45:33,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:45:33,702 INFO L82 PathProgramCache]: Analyzing trace with hash -282967061, now seen corresponding path program 1 times [2021-10-16 02:45:33,702 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 02:45:33,702 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1828290063] [2021-10-16 02:45:33,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:45:33,702 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 02:45:33,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:45:33,769 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:45:33,770 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 02:45:33,770 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1828290063] [2021-10-16 02:45:33,770 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1828290063] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-16 02:45:33,770 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1317047188] [2021-10-16 02:45:33,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:45:33,771 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 02:45:33,771 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27c4341a-bf93-46b1-838f-cd05a91b086a/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 02:45:33,775 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27c4341a-bf93-46b1-838f-cd05a91b086a/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-16 02:45:33,800 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27c4341a-bf93-46b1-838f-cd05a91b086a/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-16 02:45:33,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:45:33,857 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 13 conjunts are in the unsatisfiable core [2021-10-16 02:45:33,863 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:45:33,917 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 02:45:33,919 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 02:45:33,920 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 02:45:33,922 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 17 [2021-10-16 02:45:33,934 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 02:45:33,935 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 02:45:33,936 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 02:45:33,938 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 17 [2021-10-16 02:45:34,275 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 02:45:34,276 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 31 [2021-10-16 02:45:34,292 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 02:45:34,292 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-10-16 02:45:34,316 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:45:34,316 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:45:34,476 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:45:34,477 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1317047188] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:45:34,477 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [466117752] [2021-10-16 02:45:34,498 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2021-10-16 02:45:34,498 INFO L166 IcfgInterpreter]: Building call graph [2021-10-16 02:45:34,503 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-10-16 02:45:34,509 INFO L176 IcfgInterpreter]: Starting interpretation [2021-10-16 02:45:34,509 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-10-16 02:45:34,551 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 02:45:34,559 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-16 02:45:34,560 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 02:45:34,561 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-16 02:45:34,562 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 02:45:34,563 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 33 [2021-10-16 02:45:34,563 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 34 [2021-10-16 02:45:34,564 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-16 02:45:34,567 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 02:45:34,568 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-16 02:45:34,569 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 02:45:34,570 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 55 [2021-10-16 02:45:34,571 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 56 [2021-10-16 02:45:34,572 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-16 02:45:34,590 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 02:45:34,591 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-16 02:45:34,592 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 02:45:34,593 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 35 [2021-10-16 02:45:34,594 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 36 [2021-10-16 02:45:34,594 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-16 02:45:34,596 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 02:45:34,597 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-16 02:45:34,597 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 02:45:34,599 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 55 [2021-10-16 02:45:34,601 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 56 [2021-10-16 02:45:34,602 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-16 02:45:34,603 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 02:45:34,608 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-16 02:45:34,608 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 02:45:34,609 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 32 [2021-10-16 02:45:34,610 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 33 [2021-10-16 02:45:34,610 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-16 02:45:34,611 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 02:45:34,620 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 118 [2021-10-16 02:45:34,621 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-16 02:45:34,623 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 02:45:34,624 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-16 02:45:34,624 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 02:45:34,625 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 27 [2021-10-16 02:45:34,626 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 28 [2021-10-16 02:45:34,627 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-16 02:45:34,627 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 02:45:34,628 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 55 [2021-10-16 02:45:34,629 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-16 02:45:34,629 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 02:45:34,630 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-16 02:45:34,630 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 02:45:34,631 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 27 [2021-10-16 02:45:34,631 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 28 [2021-10-16 02:45:34,632 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-16 02:45:34,632 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 02:45:34,633 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 55 [2021-10-16 02:45:34,634 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-16 02:45:34,634 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 02:45:34,635 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 69 [2021-10-16 02:45:34,636 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-16 02:45:34,636 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 02:45:34,637 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-10-16 02:45:34,640 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 373 [2021-10-16 02:45:34,695 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 02:45:34,706 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 02:45:34,714 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 02:45:34,721 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 02:45:34,735 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 02:45:34,746 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 02:45:34,752 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 13 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 21 [2021-10-16 02:45:34,753 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 02:45:34,753 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-10-16 02:45:34,755 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 02:45:34,761 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-10-16 02:45:34,762 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-10-16 02:45:34,763 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-16 02:45:34,798 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 02:45:34,819 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 02:45:34,839 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 369 [2021-10-16 02:45:34,840 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-10-16 02:45:34,840 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:364, output treesize:369 [2021-10-16 02:45:34,880 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27c4341a-bf93-46b1-838f-cd05a91b086a/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-10-16 02:45:35,067 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27c4341a-bf93-46b1-838f-cd05a91b086a/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 02:45:35,068 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.AssertionError: No corresponding IProgramVar for |v_#memory_int_39| at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.TermVarsProc.computeTermVarsProc(TermVarsProc.java:97) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.TermVarsProc.computeTermVarsProc(TermVarsProc.java:83) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.BasicPredicateFactory.constructTermVarsProc(BasicPredicateFactory.java:92) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.BasicPredicateFactory.newPredicate(BasicPredicateFactory.java:81) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools.predicate(SymbolicTools.java:174) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools.post(SymbolicTools.java:116) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretInternal(DagInterpreter.java:227) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretTransAndStoreLoiPred(DagInterpreter.java:209) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretTrans(DagInterpreter.java:187) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretNode(DagInterpreter.java:165) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.interpret(DagInterpreter.java:123) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpretLoisInProcedure(IcfgInterpreter.java:136) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpret(IcfgInterpreter.java:127) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:102) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:268) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:88) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:608) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:413) 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:53) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:392) 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) [2021-10-16 02:45:35,071 INFO L168 Benchmark]: Toolchain (without parser) took 6759.96 ms. Allocated memory was 111.1 MB in the beginning and 142.6 MB in the end (delta: 31.5 MB). Free memory was 77.5 MB in the beginning and 100.5 MB in the end (delta: -23.0 MB). Peak memory consumption was 61.2 MB. Max. memory is 16.1 GB. [2021-10-16 02:45:35,072 INFO L168 Benchmark]: CDTParser took 0.25 ms. Allocated memory is still 111.1 MB. Free memory is still 63.9 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-16 02:45:35,072 INFO L168 Benchmark]: CACSL2BoogieTranslator took 597.63 ms. Allocated memory was 111.1 MB in the beginning and 142.6 MB in the end (delta: 31.5 MB). Free memory was 77.1 MB in the beginning and 107.7 MB in the end (delta: -30.5 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. [2021-10-16 02:45:35,073 INFO L168 Benchmark]: Boogie Procedure Inliner took 54.11 ms. Allocated memory is still 142.6 MB. Free memory was 107.7 MB in the beginning and 105.6 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-16 02:45:35,073 INFO L168 Benchmark]: Boogie Preprocessor took 41.57 ms. Allocated memory is still 142.6 MB. Free memory was 105.6 MB in the beginning and 103.5 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-16 02:45:35,073 INFO L168 Benchmark]: RCFGBuilder took 1203.39 ms. Allocated memory is still 142.6 MB. Free memory was 103.5 MB in the beginning and 76.2 MB in the end (delta: 27.3 MB). Peak memory consumption was 27.3 MB. Max. memory is 16.1 GB. [2021-10-16 02:45:35,074 INFO L168 Benchmark]: TraceAbstraction took 4853.72 ms. Allocated memory is still 142.6 MB. Free memory was 75.6 MB in the beginning and 100.5 MB in the end (delta: -24.8 MB). Peak memory consumption was 30.5 MB. Max. memory is 16.1 GB. [2021-10-16 02:45:35,076 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25 ms. Allocated memory is still 111.1 MB. Free memory is still 63.9 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 597.63 ms. Allocated memory was 111.1 MB in the beginning and 142.6 MB in the end (delta: 31.5 MB). Free memory was 77.1 MB in the beginning and 107.7 MB in the end (delta: -30.5 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 54.11 ms. Allocated memory is still 142.6 MB. Free memory was 107.7 MB in the beginning and 105.6 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 41.57 ms. Allocated memory is still 142.6 MB. Free memory was 105.6 MB in the beginning and 103.5 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 1203.39 ms. Allocated memory is still 142.6 MB. Free memory was 103.5 MB in the beginning and 76.2 MB in the end (delta: 27.3 MB). Peak memory consumption was 27.3 MB. Max. memory is 16.1 GB. * TraceAbstraction took 4853.72 ms. Allocated memory is still 142.6 MB. Free memory was 75.6 MB in the beginning and 100.5 MB in the end (delta: -24.8 MB). Peak memory consumption was 30.5 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: AssertionError: No corresponding IProgramVar for |v_#memory_int_39| de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: AssertionError: No corresponding IProgramVar for |v_#memory_int_39|: de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.TermVarsProc.computeTermVarsProc(TermVarsProc.java:97) RESULT: Ultimate could not prove your program: Toolchain returned no result. [2021-10-16 02:45:35,113 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27c4341a-bf93-46b1-838f-cd05a91b086a/bin/utaipan-mTDlp9Zugs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... ### Bit-precise run ### This is Ultimate 0.2.1-dev-5709675 [2021-10-16 02:45:37,762 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-16 02:45:37,765 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-16 02:45:37,825 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-16 02:45:37,825 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-16 02:45:37,833 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-16 02:45:37,836 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-16 02:45:37,845 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-16 02:45:37,848 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-16 02:45:37,859 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-16 02:45:37,860 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-16 02:45:37,861 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-16 02:45:37,862 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-16 02:45:37,865 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-16 02:45:37,867 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-16 02:45:37,869 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-16 02:45:37,871 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-16 02:45:37,872 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-16 02:45:37,878 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-16 02:45:37,881 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-16 02:45:37,887 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-16 02:45:37,889 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-16 02:45:37,890 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-16 02:45:37,891 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-16 02:45:37,898 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-16 02:45:37,899 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-16 02:45:37,899 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-16 02:45:37,901 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-16 02:45:37,902 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-16 02:45:37,903 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-16 02:45:37,904 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-16 02:45:37,905 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-16 02:45:37,907 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-16 02:45:37,908 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-16 02:45:37,909 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-16 02:45:37,910 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-16 02:45:37,911 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-16 02:45:37,911 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-16 02:45:37,911 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-16 02:45:37,913 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-16 02:45:37,914 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-16 02:45:37,915 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27c4341a-bf93-46b1-838f-cd05a91b086a/bin/utaipan-mTDlp9Zugs/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-10-16 02:45:37,961 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-16 02:45:37,961 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-16 02:45:37,963 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-16 02:45:37,963 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-16 02:45:37,963 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-16 02:45:37,964 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-16 02:45:37,964 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-16 02:45:37,964 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-16 02:45:37,964 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-16 02:45:37,966 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-16 02:45:37,967 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-16 02:45:37,967 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-16 02:45:37,968 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-16 02:45:37,968 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-16 02:45:37,968 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-16 02:45:37,968 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-16 02:45:37,968 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-16 02:45:37,969 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-10-16 02:45:37,969 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-10-16 02:45:37,969 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-16 02:45:37,969 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-16 02:45:37,970 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-16 02:45:37,970 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-16 02:45:37,970 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-16 02:45:37,970 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-16 02:45:37,971 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-16 02:45:37,971 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-16 02:45:37,971 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-16 02:45:37,971 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-16 02:45:37,971 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-16 02:45:37,972 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-10-16 02:45:37,972 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-10-16 02:45:37,972 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-16 02:45:37,972 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-16 02:45:37,973 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-16 02:45:37,973 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:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27c4341a-bf93-46b1-838f-cd05a91b086a/bin/utaipan-mTDlp9Zugs/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27c4341a-bf93-46b1-838f-cd05a91b086a/bin/utaipan-mTDlp9Zugs Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6280f60c5fc83ecad8fef176a397be33dbf47346 [2021-10-16 02:45:38,399 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-16 02:45:38,438 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-16 02:45:38,441 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-16 02:45:38,442 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-16 02:45:38,443 INFO L275 PluginConnector]: CDTParser initialized [2021-10-16 02:45:38,446 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27c4341a-bf93-46b1-838f-cd05a91b086a/bin/utaipan-mTDlp9Zugs/../../sv-benchmarks/c/forester-heap/dll-rb-sentinel-2.i [2021-10-16 02:45:38,527 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27c4341a-bf93-46b1-838f-cd05a91b086a/bin/utaipan-mTDlp9Zugs/data/e09a4b243/d9cdaff8c6dd4d3aa4c296f43f107bef/FLAGea476f4e2 [2021-10-16 02:45:39,154 INFO L306 CDTParser]: Found 1 translation units. [2021-10-16 02:45:39,155 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27c4341a-bf93-46b1-838f-cd05a91b086a/sv-benchmarks/c/forester-heap/dll-rb-sentinel-2.i [2021-10-16 02:45:39,169 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27c4341a-bf93-46b1-838f-cd05a91b086a/bin/utaipan-mTDlp9Zugs/data/e09a4b243/d9cdaff8c6dd4d3aa4c296f43f107bef/FLAGea476f4e2 [2021-10-16 02:45:39,387 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27c4341a-bf93-46b1-838f-cd05a91b086a/bin/utaipan-mTDlp9Zugs/data/e09a4b243/d9cdaff8c6dd4d3aa4c296f43f107bef [2021-10-16 02:45:39,390 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-16 02:45:39,391 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-16 02:45:39,392 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-16 02:45:39,392 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-16 02:45:39,396 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-16 02:45:39,396 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.10 02:45:39" (1/1) ... [2021-10-16 02:45:39,398 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4ba5f41e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:45:39, skipping insertion in model container [2021-10-16 02:45:39,398 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.10 02:45:39" (1/1) ... [2021-10-16 02:45:39,417 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-16 02:45:39,462 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-16 02:45:39,846 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27c4341a-bf93-46b1-838f-cd05a91b086a/sv-benchmarks/c/forester-heap/dll-rb-sentinel-2.i[22673,22686] [2021-10-16 02:45:39,850 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27c4341a-bf93-46b1-838f-cd05a91b086a/sv-benchmarks/c/forester-heap/dll-rb-sentinel-2.i[22743,22756] [2021-10-16 02:45:39,851 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27c4341a-bf93-46b1-838f-cd05a91b086a/sv-benchmarks/c/forester-heap/dll-rb-sentinel-2.i[22807,22820] [2021-10-16 02:45:39,852 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27c4341a-bf93-46b1-838f-cd05a91b086a/sv-benchmarks/c/forester-heap/dll-rb-sentinel-2.i[22902,22915] [2021-10-16 02:45:39,854 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27c4341a-bf93-46b1-838f-cd05a91b086a/sv-benchmarks/c/forester-heap/dll-rb-sentinel-2.i[22974,22987] [2021-10-16 02:45:39,855 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27c4341a-bf93-46b1-838f-cd05a91b086a/sv-benchmarks/c/forester-heap/dll-rb-sentinel-2.i[23113,23126] [2021-10-16 02:45:39,856 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27c4341a-bf93-46b1-838f-cd05a91b086a/sv-benchmarks/c/forester-heap/dll-rb-sentinel-2.i[23187,23200] [2021-10-16 02:45:39,861 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-16 02:45:39,874 INFO L203 MainTranslator]: Completed pre-run [2021-10-16 02:45:39,909 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27c4341a-bf93-46b1-838f-cd05a91b086a/sv-benchmarks/c/forester-heap/dll-rb-sentinel-2.i[22673,22686] [2021-10-16 02:45:39,911 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27c4341a-bf93-46b1-838f-cd05a91b086a/sv-benchmarks/c/forester-heap/dll-rb-sentinel-2.i[22743,22756] [2021-10-16 02:45:39,911 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27c4341a-bf93-46b1-838f-cd05a91b086a/sv-benchmarks/c/forester-heap/dll-rb-sentinel-2.i[22807,22820] [2021-10-16 02:45:39,913 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27c4341a-bf93-46b1-838f-cd05a91b086a/sv-benchmarks/c/forester-heap/dll-rb-sentinel-2.i[22902,22915] [2021-10-16 02:45:39,914 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27c4341a-bf93-46b1-838f-cd05a91b086a/sv-benchmarks/c/forester-heap/dll-rb-sentinel-2.i[22974,22987] [2021-10-16 02:45:39,915 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27c4341a-bf93-46b1-838f-cd05a91b086a/sv-benchmarks/c/forester-heap/dll-rb-sentinel-2.i[23113,23126] [2021-10-16 02:45:39,916 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27c4341a-bf93-46b1-838f-cd05a91b086a/sv-benchmarks/c/forester-heap/dll-rb-sentinel-2.i[23187,23200] [2021-10-16 02:45:39,920 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-16 02:45:39,954 INFO L208 MainTranslator]: Completed translation [2021-10-16 02:45:39,954 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:45:39 WrapperNode [2021-10-16 02:45:39,955 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-16 02:45:39,956 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-16 02:45:39,956 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-16 02:45:39,956 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-16 02:45:39,963 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:45:39" (1/1) ... [2021-10-16 02:45:39,982 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:45:39" (1/1) ... [2021-10-16 02:45:40,008 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-16 02:45:40,009 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-16 02:45:40,010 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-16 02:45:40,010 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-16 02:45:40,018 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:45:39" (1/1) ... [2021-10-16 02:45:40,018 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:45:39" (1/1) ... [2021-10-16 02:45:40,024 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:45:39" (1/1) ... [2021-10-16 02:45:40,024 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:45:39" (1/1) ... [2021-10-16 02:45:40,037 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:45:39" (1/1) ... [2021-10-16 02:45:40,044 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:45:39" (1/1) ... [2021-10-16 02:45:40,047 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:45:39" (1/1) ... [2021-10-16 02:45:40,052 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-16 02:45:40,053 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-16 02:45:40,053 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-16 02:45:40,053 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-16 02:45:40,054 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:45:39" (1/1) ... [2021-10-16 02:45:40,061 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-16 02:45:40,077 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27c4341a-bf93-46b1-838f-cd05a91b086a/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 02:45:40,088 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27c4341a-bf93-46b1-838f-cd05a91b086a/bin/utaipan-mTDlp9Zugs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-16 02:45:40,090 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27c4341a-bf93-46b1-838f-cd05a91b086a/bin/utaipan-mTDlp9Zugs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-16 02:45:40,125 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-10-16 02:45:40,125 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-10-16 02:45:40,125 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-10-16 02:45:40,125 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-16 02:45:40,125 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-10-16 02:45:40,126 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-16 02:45:40,126 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-10-16 02:45:40,126 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-10-16 02:45:40,126 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-16 02:45:40,126 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-16 02:45:41,650 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-16 02:45:41,650 INFO L299 CfgBuilder]: Removed 21 assume(true) statements. [2021-10-16 02:45:41,652 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 02:45:41 BoogieIcfgContainer [2021-10-16 02:45:41,652 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-16 02:45:41,654 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-16 02:45:41,654 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-16 02:45:41,656 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-16 02:45:41,656 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.10 02:45:39" (1/3) ... [2021-10-16 02:45:41,659 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@486eb943 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.10 02:45:41, skipping insertion in model container [2021-10-16 02:45:41,660 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:45:39" (2/3) ... [2021-10-16 02:45:41,660 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@486eb943 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.10 02:45:41, skipping insertion in model container [2021-10-16 02:45:41,660 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 02:45:41" (3/3) ... [2021-10-16 02:45:41,662 INFO L111 eAbstractionObserver]: Analyzing ICFG dll-rb-sentinel-2.i [2021-10-16 02:45:41,668 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-16 02:45:41,668 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 7 error locations. [2021-10-16 02:45:41,710 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-16 02:45:41,716 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=true, mConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, 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 [2021-10-16 02:45:41,717 INFO L340 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2021-10-16 02:45:41,732 INFO L276 IsEmpty]: Start isEmpty. Operand has 46 states, 38 states have (on average 1.9736842105263157) internal successors, (75), 45 states have internal predecessors, (75), 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) [2021-10-16 02:45:41,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-10-16 02:45:41,751 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:45:41,752 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-10-16 02:45:41,753 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-10-16 02:45:41,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:45:41,758 INFO L82 PathProgramCache]: Analyzing trace with hash 891569350, now seen corresponding path program 1 times [2021-10-16 02:45:41,780 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:45:41,781 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [145705660] [2021-10-16 02:45:41,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:45:41,782 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:45:41,782 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27c4341a-bf93-46b1-838f-cd05a91b086a/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:45:41,785 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27c4341a-bf93-46b1-838f-cd05a91b086a/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:45:41,809 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27c4341a-bf93-46b1-838f-cd05a91b086a/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-10-16 02:45:41,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:45:41,920 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 1 conjunts are in the unsatisfiable core [2021-10-16 02:45:41,924 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:45:41,977 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:45:41,977 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:45:42,003 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:45:42,004 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:45:42,004 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [145705660] [2021-10-16 02:45:42,006 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [145705660] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-16 02:45:42,006 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:45:42,006 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-10-16 02:45:42,009 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1383951209] [2021-10-16 02:45:42,014 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-10-16 02:45:42,014 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:45:42,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-10-16 02:45:42,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-16 02:45:42,032 INFO L87 Difference]: Start difference. First operand has 46 states, 38 states have (on average 1.9736842105263157) internal successors, (75), 45 states have internal predecessors, (75), 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) Second operand has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 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) [2021-10-16 02:45:42,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:45:42,057 INFO L93 Difference]: Finished difference Result 90 states and 148 transitions. [2021-10-16 02:45:42,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-10-16 02:45:42,059 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 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 6 [2021-10-16 02:45:42,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:45:42,067 INFO L225 Difference]: With dead ends: 90 [2021-10-16 02:45:42,067 INFO L226 Difference]: Without dead ends: 40 [2021-10-16 02:45:42,070 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0ms TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-16 02:45:42,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-10-16 02:45:42,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2021-10-16 02:45:42,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 33 states have (on average 1.303030303030303) internal successors, (43), 39 states have internal predecessors, (43), 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) [2021-10-16 02:45:42,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 43 transitions. [2021-10-16 02:45:42,110 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 43 transitions. Word has length 6 [2021-10-16 02:45:42,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:45:42,111 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 43 transitions. [2021-10-16 02:45:42,111 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 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) [2021-10-16 02:45:42,111 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 43 transitions. [2021-10-16 02:45:42,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-10-16 02:45:42,112 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:45:42,112 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-10-16 02:45:42,135 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27c4341a-bf93-46b1-838f-cd05a91b086a/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-10-16 02:45:42,335 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27c4341a-bf93-46b1-838f-cd05a91b086a/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 02:45:42,336 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-10-16 02:45:42,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:45:42,337 INFO L82 PathProgramCache]: Analyzing trace with hash 889692517, now seen corresponding path program 1 times [2021-10-16 02:45:42,337 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:45:42,338 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [320930453] [2021-10-16 02:45:42,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:45:42,338 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:45:42,339 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27c4341a-bf93-46b1-838f-cd05a91b086a/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:45:42,340 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27c4341a-bf93-46b1-838f-cd05a91b086a/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:45:42,399 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27c4341a-bf93-46b1-838f-cd05a91b086a/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-10-16 02:45:42,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:45:42,466 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-16 02:45:42,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:45:42,521 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-10-16 02:45:42,576 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:45:42,577 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:45:42,620 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:45:42,621 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:45:42,621 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [320930453] [2021-10-16 02:45:42,621 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [320930453] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-16 02:45:42,621 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:45:42,622 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-10-16 02:45:42,623 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [576677139] [2021-10-16 02:45:42,627 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-16 02:45:42,627 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:45:42,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-16 02:45:42,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-16 02:45:42,632 INFO L87 Difference]: Start difference. First operand 40 states and 43 transitions. Second operand has 4 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 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) [2021-10-16 02:45:43,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:45:43,418 INFO L93 Difference]: Finished difference Result 45 states and 50 transitions. [2021-10-16 02:45:43,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-16 02:45:43,419 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 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 6 [2021-10-16 02:45:43,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:45:43,420 INFO L225 Difference]: With dead ends: 45 [2021-10-16 02:45:43,420 INFO L226 Difference]: Without dead ends: 43 [2021-10-16 02:45:43,420 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 31.7ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-16 02:45:43,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-10-16 02:45:43,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 38. [2021-10-16 02:45:43,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 32 states have (on average 1.28125) internal successors, (41), 37 states have internal predecessors, (41), 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) [2021-10-16 02:45:43,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 41 transitions. [2021-10-16 02:45:43,426 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 41 transitions. Word has length 6 [2021-10-16 02:45:43,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:45:43,426 INFO L470 AbstractCegarLoop]: Abstraction has 38 states and 41 transitions. [2021-10-16 02:45:43,426 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 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) [2021-10-16 02:45:43,427 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 41 transitions. [2021-10-16 02:45:43,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-10-16 02:45:43,430 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:45:43,430 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:45:43,444 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27c4341a-bf93-46b1-838f-cd05a91b086a/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-10-16 02:45:43,639 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27c4341a-bf93-46b1-838f-cd05a91b086a/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 02:45:43,640 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-10-16 02:45:43,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:45:43,640 INFO L82 PathProgramCache]: Analyzing trace with hash 1810723981, now seen corresponding path program 1 times [2021-10-16 02:45:43,641 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:45:43,641 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2139846474] [2021-10-16 02:45:43,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:45:43,641 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:45:43,642 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27c4341a-bf93-46b1-838f-cd05a91b086a/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:45:43,651 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27c4341a-bf93-46b1-838f-cd05a91b086a/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:45:43,671 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27c4341a-bf93-46b1-838f-cd05a91b086a/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-10-16 02:45:43,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:45:43,760 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-16 02:45:43,761 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:45:43,787 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 13 treesize of output 9 [2021-10-16 02:45:43,838 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2021-10-16 02:45:43,855 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:45:43,856 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:45:43,914 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:45:43,914 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:45:43,914 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2139846474] [2021-10-16 02:45:43,915 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2139846474] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-16 02:45:43,915 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:45:43,915 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-10-16 02:45:43,915 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1779797505] [2021-10-16 02:45:43,916 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-16 02:45:43,916 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:45:43,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-16 02:45:43,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-16 02:45:43,917 INFO L87 Difference]: Start difference. First operand 38 states and 41 transitions. Second operand has 4 states, 4 states have (on average 1.75) 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) [2021-10-16 02:45:44,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:45:44,301 INFO L93 Difference]: Finished difference Result 38 states and 41 transitions. [2021-10-16 02:45:44,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-16 02:45:44,302 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.75) 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 [2021-10-16 02:45:44,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:45:44,303 INFO L225 Difference]: With dead ends: 38 [2021-10-16 02:45:44,303 INFO L226 Difference]: Without dead ends: 36 [2021-10-16 02:45:44,303 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 29.1ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-16 02:45:44,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-10-16 02:45:44,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2021-10-16 02:45:44,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 31 states have (on average 1.2580645161290323) internal successors, (39), 35 states have internal predecessors, (39), 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) [2021-10-16 02:45:44,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 39 transitions. [2021-10-16 02:45:44,308 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 39 transitions. Word has length 7 [2021-10-16 02:45:44,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:45:44,308 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 39 transitions. [2021-10-16 02:45:44,309 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.75) 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) [2021-10-16 02:45:44,309 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 39 transitions. [2021-10-16 02:45:44,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-10-16 02:45:44,309 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:45:44,309 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:45:44,334 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27c4341a-bf93-46b1-838f-cd05a91b086a/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-10-16 02:45:44,525 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27c4341a-bf93-46b1-838f-cd05a91b086a/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 02:45:44,525 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-10-16 02:45:44,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:45:44,526 INFO L82 PathProgramCache]: Analyzing trace with hash 590587384, now seen corresponding path program 1 times [2021-10-16 02:45:44,526 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:45:44,527 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2089719691] [2021-10-16 02:45:44,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:45:44,527 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:45:44,527 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27c4341a-bf93-46b1-838f-cd05a91b086a/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:45:44,529 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27c4341a-bf93-46b1-838f-cd05a91b086a/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:45:44,535 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27c4341a-bf93-46b1-838f-cd05a91b086a/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-10-16 02:45:44,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:45:44,621 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-16 02:45:44,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:45:44,646 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 13 treesize of output 9 [2021-10-16 02:45:44,782 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-10-16 02:45:44,799 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:45:44,799 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:45:44,899 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:45:44,899 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:45:44,900 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2089719691] [2021-10-16 02:45:44,900 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2089719691] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-16 02:45:44,900 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:45:44,900 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 7 [2021-10-16 02:45:44,900 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1472767588] [2021-10-16 02:45:44,901 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-16 02:45:44,901 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:45:44,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-16 02:45:44,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-10-16 02:45:44,902 INFO L87 Difference]: Start difference. First operand 36 states and 39 transitions. Second operand has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 7 states have internal predecessors, (15), 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) [2021-10-16 02:45:48,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:45:48,502 INFO L93 Difference]: Finished difference Result 75 states and 83 transitions. [2021-10-16 02:45:48,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-16 02:45:48,503 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 7 states have internal predecessors, (15), 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 9 [2021-10-16 02:45:48,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:45:48,504 INFO L225 Difference]: With dead ends: 75 [2021-10-16 02:45:48,504 INFO L226 Difference]: Without dead ends: 73 [2021-10-16 02:45:48,504 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 144.9ms TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-10-16 02:45:48,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2021-10-16 02:45:48,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 52. [2021-10-16 02:45:48,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 47 states have (on average 1.2765957446808511) internal successors, (60), 51 states have internal predecessors, (60), 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) [2021-10-16 02:45:48,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 60 transitions. [2021-10-16 02:45:48,513 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 60 transitions. Word has length 9 [2021-10-16 02:45:48,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:45:48,513 INFO L470 AbstractCegarLoop]: Abstraction has 52 states and 60 transitions. [2021-10-16 02:45:48,514 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 7 states have internal predecessors, (15), 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) [2021-10-16 02:45:48,514 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 60 transitions. [2021-10-16 02:45:48,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-10-16 02:45:48,514 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:45:48,514 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:45:48,529 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27c4341a-bf93-46b1-838f-cd05a91b086a/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-10-16 02:45:48,723 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27c4341a-bf93-46b1-838f-cd05a91b086a/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 02:45:48,723 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-10-16 02:45:48,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:45:48,724 INFO L82 PathProgramCache]: Analyzing trace with hash -1507179337, now seen corresponding path program 1 times [2021-10-16 02:45:48,725 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:45:48,725 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1043812992] [2021-10-16 02:45:48,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:45:48,725 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:45:48,726 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27c4341a-bf93-46b1-838f-cd05a91b086a/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:45:48,731 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27c4341a-bf93-46b1-838f-cd05a91b086a/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:45:48,743 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27c4341a-bf93-46b1-838f-cd05a91b086a/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-10-16 02:45:48,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:45:48,959 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-16 02:45:48,961 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:45:50,290 INFO L354 Elim1Store]: treesize reduction 163, result has 25.6 percent of original size [2021-10-16 02:45:50,291 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 3 case distinctions, treesize of input 141 treesize of output 126 [2021-10-16 02:45:51,015 INFO L354 Elim1Store]: treesize reduction 163, result has 25.6 percent of original size [2021-10-16 02:45:51,016 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 3 case distinctions, treesize of input 126 treesize of output 111 [2021-10-16 02:45:54,490 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 02:45:54,490 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 135 treesize of output 142 [2021-10-16 02:45:54,549 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 02:45:54,549 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 142 treesize of output 141 [2021-10-16 02:45:55,302 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:45:55,302 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:45:55,491 INFO L354 Elim1Store]: treesize reduction 235, result has 0.4 percent of original size [2021-10-16 02:45:55,492 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 3 case distinctions, treesize of input 158 treesize of output 1 [2021-10-16 02:45:55,500 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:45:55,500 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:45:55,500 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1043812992] [2021-10-16 02:45:55,500 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1043812992] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-16 02:45:55,500 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:45:55,501 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 7 [2021-10-16 02:45:55,501 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [756106926] [2021-10-16 02:45:55,501 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-16 02:45:55,501 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:45:55,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-16 02:45:55,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-10-16 02:45:55,503 INFO L87 Difference]: Start difference. First operand 52 states and 60 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 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) [2021-10-16 02:46:01,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:46:01,983 INFO L93 Difference]: Finished difference Result 64 states and 74 transitions. [2021-10-16 02:46:01,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-16 02:46:01,984 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 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 10 [2021-10-16 02:46:01,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:46:01,985 INFO L225 Difference]: With dead ends: 64 [2021-10-16 02:46:01,985 INFO L226 Difference]: Without dead ends: 62 [2021-10-16 02:46:01,985 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 307.2ms TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2021-10-16 02:46:01,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-10-16 02:46:02,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 50. [2021-10-16 02:46:02,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 46 states have (on average 1.2391304347826086) internal successors, (57), 49 states have internal predecessors, (57), 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) [2021-10-16 02:46:02,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 57 transitions. [2021-10-16 02:46:02,005 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 57 transitions. Word has length 10 [2021-10-16 02:46:02,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:46:02,006 INFO L470 AbstractCegarLoop]: Abstraction has 50 states and 57 transitions. [2021-10-16 02:46:02,006 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 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) [2021-10-16 02:46:02,006 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 57 transitions. [2021-10-16 02:46:02,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-10-16 02:46:02,007 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:46:02,007 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:46:02,025 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27c4341a-bf93-46b1-838f-cd05a91b086a/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-10-16 02:46:02,225 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27c4341a-bf93-46b1-838f-cd05a91b086a/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 02:46:02,225 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-10-16 02:46:02,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:46:02,226 INFO L82 PathProgramCache]: Analyzing trace with hash -995236357, now seen corresponding path program 1 times [2021-10-16 02:46:02,226 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:46:02,226 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1874648402] [2021-10-16 02:46:02,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:46:02,227 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:46:02,227 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27c4341a-bf93-46b1-838f-cd05a91b086a/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:46:02,227 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27c4341a-bf93-46b1-838f-cd05a91b086a/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:46:02,233 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27c4341a-bf93-46b1-838f-cd05a91b086a/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-10-16 02:46:02,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:46:02,459 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-16 02:46:02,461 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:46:02,498 INFO L354 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2021-10-16 02:46:02,498 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 21 [2021-10-16 02:46:02,605 INFO L354 Elim1Store]: treesize reduction 38, result has 39.7 percent of original size [2021-10-16 02:46:02,605 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 59 treesize of output 76 [2021-10-16 02:46:02,808 INFO L354 Elim1Store]: treesize reduction 36, result has 26.5 percent of original size [2021-10-16 02:46:02,809 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 85 treesize of output 89 [2021-10-16 02:46:02,875 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:46:02,875 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:46:07,022 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:46:07,023 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:46:07,023 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1874648402] [2021-10-16 02:46:07,023 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1874648402] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-16 02:46:07,023 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:46:07,024 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 7 [2021-10-16 02:46:07,024 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2063055829] [2021-10-16 02:46:07,024 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-16 02:46:07,024 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:46:07,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-16 02:46:07,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=22, Unknown=1, NotChecked=0, Total=42 [2021-10-16 02:46:07,025 INFO L87 Difference]: Start difference. First operand 50 states and 57 transitions. Second operand has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 7 states have internal predecessors, (15), 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) [2021-10-16 02:46:10,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:46:10,413 INFO L93 Difference]: Finished difference Result 51 states and 58 transitions. [2021-10-16 02:46:10,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-16 02:46:10,414 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 7 states have internal predecessors, (15), 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 12 [2021-10-16 02:46:10,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:46:10,415 INFO L225 Difference]: With dead ends: 51 [2021-10-16 02:46:10,415 INFO L226 Difference]: Without dead ends: 49 [2021-10-16 02:46:10,415 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 4108.6ms TimeCoverageRelationStatistics Valid=19, Invalid=22, Unknown=1, NotChecked=0, Total=42 [2021-10-16 02:46:10,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2021-10-16 02:46:10,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 48. [2021-10-16 02:46:10,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 45 states have (on average 1.2) internal successors, (54), 47 states have internal predecessors, (54), 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) [2021-10-16 02:46:10,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 54 transitions. [2021-10-16 02:46:10,422 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 54 transitions. Word has length 12 [2021-10-16 02:46:10,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:46:10,422 INFO L470 AbstractCegarLoop]: Abstraction has 48 states and 54 transitions. [2021-10-16 02:46:10,423 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 7 states have internal predecessors, (15), 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) [2021-10-16 02:46:10,423 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 54 transitions. [2021-10-16 02:46:10,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-10-16 02:46:10,424 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:46:10,424 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:46:10,437 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27c4341a-bf93-46b1-838f-cd05a91b086a/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (7)] Ended with exit code 0 [2021-10-16 02:46:10,637 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27c4341a-bf93-46b1-838f-cd05a91b086a/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 02:46:10,638 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-10-16 02:46:10,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:46:10,638 INFO L82 PathProgramCache]: Analyzing trace with hash 2079156959, now seen corresponding path program 1 times [2021-10-16 02:46:10,638 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:46:10,639 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [323186325] [2021-10-16 02:46:10,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:46:10,639 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:46:10,639 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27c4341a-bf93-46b1-838f-cd05a91b086a/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:46:10,640 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27c4341a-bf93-46b1-838f-cd05a91b086a/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:46:10,641 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27c4341a-bf93-46b1-838f-cd05a91b086a/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-10-16 02:46:10,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:46:10,739 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-16 02:46:10,741 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:46:10,761 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 13 treesize of output 9 [2021-10-16 02:46:10,867 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-10-16 02:46:10,892 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:46:10,892 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:46:11,002 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:46:11,002 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:46:11,002 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [323186325] [2021-10-16 02:46:11,002 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [323186325] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-16 02:46:11,002 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:46:11,002 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2021-10-16 02:46:11,003 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [190785523] [2021-10-16 02:46:11,003 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-16 02:46:11,003 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:46:11,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-16 02:46:11,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-10-16 02:46:11,004 INFO L87 Difference]: Start difference. First operand 48 states and 54 transitions. Second operand has 8 states, 8 states have (on average 2.875) internal successors, (23), 8 states have internal predecessors, (23), 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) [2021-10-16 02:46:13,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:46:13,264 INFO L93 Difference]: Finished difference Result 77 states and 86 transitions. [2021-10-16 02:46:13,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-16 02:46:13,265 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 8 states have internal predecessors, (23), 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 [2021-10-16 02:46:13,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:46:13,265 INFO L225 Difference]: With dead ends: 77 [2021-10-16 02:46:13,265 INFO L226 Difference]: Without dead ends: 65 [2021-10-16 02:46:13,266 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 133.9ms TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2021-10-16 02:46:13,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2021-10-16 02:46:13,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 51. [2021-10-16 02:46:13,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 48 states have (on average 1.1875) internal successors, (57), 50 states have internal predecessors, (57), 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) [2021-10-16 02:46:13,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 57 transitions. [2021-10-16 02:46:13,272 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 57 transitions. Word has length 13 [2021-10-16 02:46:13,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:46:13,273 INFO L470 AbstractCegarLoop]: Abstraction has 51 states and 57 transitions. [2021-10-16 02:46:13,273 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 8 states have internal predecessors, (23), 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) [2021-10-16 02:46:13,273 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 57 transitions. [2021-10-16 02:46:13,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-10-16 02:46:13,274 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:46:13,274 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:46:13,298 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27c4341a-bf93-46b1-838f-cd05a91b086a/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-10-16 02:46:13,489 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27c4341a-bf93-46b1-838f-cd05a91b086a/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 02:46:13,490 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-10-16 02:46:13,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:46:13,490 INFO L82 PathProgramCache]: Analyzing trace with hash -734247455, now seen corresponding path program 1 times [2021-10-16 02:46:13,490 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:46:13,491 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2088042875] [2021-10-16 02:46:13,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:46:13,491 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:46:13,491 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27c4341a-bf93-46b1-838f-cd05a91b086a/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:46:13,492 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27c4341a-bf93-46b1-838f-cd05a91b086a/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:46:13,497 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27c4341a-bf93-46b1-838f-cd05a91b086a/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-10-16 02:46:13,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:46:13,621 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-16 02:46:13,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:46:13,680 INFO L354 Elim1Store]: treesize reduction 82, result has 17.2 percent of original size [2021-10-16 02:46:13,681 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 2 case distinctions, treesize of input 27 treesize of output 17 [2021-10-16 02:46:13,696 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 02:46:13,698 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 02:46:13,700 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 02:46:13,701 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 17 [2021-10-16 02:46:14,076 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-10-16 02:46:14,077 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 47 treesize of output 33 [2021-10-16 02:46:14,083 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-10-16 02:46:14,083 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 27 treesize of output 13 [2021-10-16 02:46:14,124 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:46:14,124 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:46:14,356 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:46:14,356 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:46:14,356 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2088042875] [2021-10-16 02:46:14,356 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2088042875] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:46:14,357 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1230856603] [2021-10-16 02:46:14,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:46:14,357 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-16 02:46:14,357 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27c4341a-bf93-46b1-838f-cd05a91b086a/bin/utaipan-mTDlp9Zugs/cvc4 [2021-10-16 02:46:14,359 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27c4341a-bf93-46b1-838f-cd05a91b086a/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-16 02:46:14,383 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27c4341a-bf93-46b1-838f-cd05a91b086a/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (10)] Waiting until timeout for monitored process [2021-10-16 02:46:14,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:46:14,606 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-16 02:46:14,607 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:46:14,624 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 02:46:14,625 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 02:46:14,626 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 02:46:14,626 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 17 [2021-10-16 02:46:14,640 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 02:46:14,642 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 02:46:14,643 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 02:46:14,645 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 17 [2021-10-16 02:46:14,988 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 02:46:14,989 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 31 [2021-10-16 02:46:14,994 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 02:46:14,994 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-10-16 02:46:15,010 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:46:15,010 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:46:15,163 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:46:15,163 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1230856603] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:46:15,163 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [260803508] [2021-10-16 02:46:15,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:46:15,163 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 02:46:15,163 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27c4341a-bf93-46b1-838f-cd05a91b086a/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 02:46:15,176 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27c4341a-bf93-46b1-838f-cd05a91b086a/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-16 02:46:15,177 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27c4341a-bf93-46b1-838f-cd05a91b086a/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-10-16 02:46:15,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:46:15,356 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-16 02:46:15,357 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:46:15,422 INFO L354 Elim1Store]: treesize reduction 82, result has 17.2 percent of original size [2021-10-16 02:46:15,423 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 2 case distinctions, treesize of input 27 treesize of output 17 [2021-10-16 02:46:15,439 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 02:46:15,441 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 02:46:15,443 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 02:46:15,446 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 17 [2021-10-16 02:46:15,829 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-10-16 02:46:15,830 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 47 treesize of output 33 [2021-10-16 02:46:15,835 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-10-16 02:46:15,836 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 27 treesize of output 13 [2021-10-16 02:46:15,853 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:46:15,853 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:46:15,999 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:46:16,000 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [260803508] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:46:16,000 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-16 02:46:16,000 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5, 5] total 12 [2021-10-16 02:46:16,000 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1985851951] [2021-10-16 02:46:16,001 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-16 02:46:16,001 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:46:16,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-16 02:46:16,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-10-16 02:46:16,002 INFO L87 Difference]: Start difference. First operand 51 states and 57 transitions. Second operand has 12 states, 12 states have (on average 4.166666666666667) internal successors, (50), 12 states have internal predecessors, (50), 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) [2021-10-16 02:46:18,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:46:18,753 INFO L93 Difference]: Finished difference Result 73 states and 80 transitions. [2021-10-16 02:46:18,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-16 02:46:18,754 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.166666666666667) internal successors, (50), 12 states have internal predecessors, (50), 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 16 [2021-10-16 02:46:18,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:46:18,754 INFO L225 Difference]: With dead ends: 73 [2021-10-16 02:46:18,754 INFO L226 Difference]: Without dead ends: 51 [2021-10-16 02:46:18,755 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 430.4ms TimeCoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2021-10-16 02:46:18,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2021-10-16 02:46:18,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2021-10-16 02:46:18,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 48 states have (on average 1.1666666666666667) internal successors, (56), 50 states have internal predecessors, (56), 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) [2021-10-16 02:46:18,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 56 transitions. [2021-10-16 02:46:18,761 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 56 transitions. Word has length 16 [2021-10-16 02:46:18,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:46:18,762 INFO L470 AbstractCegarLoop]: Abstraction has 51 states and 56 transitions. [2021-10-16 02:46:18,762 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.166666666666667) internal successors, (50), 12 states have internal predecessors, (50), 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) [2021-10-16 02:46:18,762 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 56 transitions. [2021-10-16 02:46:18,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-10-16 02:46:18,763 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:46:18,763 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:46:18,788 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27c4341a-bf93-46b1-838f-cd05a91b086a/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (10)] Ended with exit code 0 [2021-10-16 02:46:18,986 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27c4341a-bf93-46b1-838f-cd05a91b086a/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-10-16 02:46:19,175 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27c4341a-bf93-46b1-838f-cd05a91b086a/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-10-16 02:46:19,366 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27c4341a-bf93-46b1-838f-cd05a91b086a/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27c4341a-bf93-46b1-838f-cd05a91b086a/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27c4341a-bf93-46b1-838f-cd05a91b086a/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 02:46:19,366 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-10-16 02:46:19,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:46:19,367 INFO L82 PathProgramCache]: Analyzing trace with hash -587248931, now seen corresponding path program 1 times [2021-10-16 02:46:19,367 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:46:19,367 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1588416995] [2021-10-16 02:46:19,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:46:19,367 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:46:19,368 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27c4341a-bf93-46b1-838f-cd05a91b086a/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:46:19,368 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27c4341a-bf93-46b1-838f-cd05a91b086a/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:46:19,369 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27c4341a-bf93-46b1-838f-cd05a91b086a/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-10-16 02:46:19,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:46:19,641 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 23 conjunts are in the unsatisfiable core [2021-10-16 02:46:19,643 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:46:19,661 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 13 treesize of output 9 [2021-10-16 02:46:19,704 INFO L354 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2021-10-16 02:46:19,704 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 1 case distinctions, treesize of input 9 treesize of output 14 [2021-10-16 02:46:19,775 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 02:46:19,780 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 02:46:19,781 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 65 [2021-10-16 02:46:19,784 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 02:46:19,785 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 66 [2021-10-16 02:46:19,791 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 02:46:19,792 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 02:46:19,861 INFO L354 Elim1Store]: treesize reduction 78, result has 26.4 percent of original size [2021-10-16 02:46:19,861 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 66 treesize of output 53 [2021-10-16 02:46:19,889 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-10-16 02:46:19,891 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 43 treesize of output 50 [2021-10-16 02:46:19,996 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:46:19,996 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1588416995] [2021-10-16 02:46:19,997 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Some non-self update cases but no top-level DER relation [2021-10-16 02:46:19,997 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1321738774] [2021-10-16 02:46:19,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:46:19,997 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-16 02:46:19,998 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27c4341a-bf93-46b1-838f-cd05a91b086a/bin/utaipan-mTDlp9Zugs/cvc4 [2021-10-16 02:46:20,013 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27c4341a-bf93-46b1-838f-cd05a91b086a/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-16 02:46:20,016 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27c4341a-bf93-46b1-838f-cd05a91b086a/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (13)] Waiting until timeout for monitored process [2021-10-16 02:46:20,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:46:20,331 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 23 conjunts are in the unsatisfiable core [2021-10-16 02:46:20,332 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.smtlibutils.IncrementalPlicationChecker@6a59f302 [2021-10-16 02:46:20,332 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [471938797] [2021-10-16 02:46:20,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:46:20,332 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 02:46:20,333 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27c4341a-bf93-46b1-838f-cd05a91b086a/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 02:46:20,339 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27c4341a-bf93-46b1-838f-cd05a91b086a/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-16 02:46:20,359 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27c4341a-bf93-46b1-838f-cd05a91b086a/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-10-16 02:46:20,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:46:20,581 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 21 conjunts are in the unsatisfiable core [2021-10-16 02:46:20,582 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.smtlibutils.IncrementalPlicationChecker@6a59f302 [2021-10-16 02:46:20,582 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:46:20,582 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [] total 0 [2021-10-16 02:46:20,582 ERROR L172 FreeRefinementEngine]: Strategy WALRUS failed to provide any proof altough trace is infeasible [2021-10-16 02:46:20,582 INFO L626 BasicCegarLoop]: Counterexample might be feasible [2021-10-16 02:46:20,588 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION [2021-10-16 02:46:20,590 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-16 02:46:20,590 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION [2021-10-16 02:46:20,590 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION [2021-10-16 02:46:20,590 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION [2021-10-16 02:46:20,590 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION [2021-10-16 02:46:20,590 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION [2021-10-16 02:46:20,606 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27c4341a-bf93-46b1-838f-cd05a91b086a/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-10-16 02:46:20,815 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27c4341a-bf93-46b1-838f-cd05a91b086a/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-10-16 02:46:20,993 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27c4341a-bf93-46b1-838f-cd05a91b086a/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (13)] Forceful destruction successful, exit code 0 [2021-10-16 02:46:21,191 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27c4341a-bf93-46b1-838f-cd05a91b086a/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27c4341a-bf93-46b1-838f-cd05a91b086a/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27c4341a-bf93-46b1-838f-cd05a91b086a/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt [2021-10-16 02:46:21,197 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-16 02:46:21,216 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 16.10 02:46:21 BoogieIcfgContainer [2021-10-16 02:46:21,217 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-16 02:46:21,218 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-16 02:46:21,218 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-16 02:46:21,218 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-16 02:46:21,219 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 02:45:41" (3/4) ... [2021-10-16 02:46:21,222 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-10-16 02:46:21,223 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-16 02:46:21,224 INFO L168 Benchmark]: Toolchain (without parser) took 41832.41 ms. Allocated memory was 65.0 MB in the beginning and 86.0 MB in the end (delta: 21.0 MB). Free memory was 43.5 MB in the beginning and 39.4 MB in the end (delta: 4.2 MB). Peak memory consumption was 23.8 MB. Max. memory is 16.1 GB. [2021-10-16 02:46:21,229 INFO L168 Benchmark]: CDTParser took 0.28 ms. Allocated memory is still 65.0 MB. Free memory is still 45.0 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-16 02:46:21,230 INFO L168 Benchmark]: CACSL2BoogieTranslator took 562.93 ms. Allocated memory is still 65.0 MB. Free memory was 43.4 MB in the beginning and 39.6 MB in the end (delta: 3.8 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2021-10-16 02:46:21,230 INFO L168 Benchmark]: Boogie Procedure Inliner took 52.88 ms. Allocated memory is still 65.0 MB. Free memory was 39.6 MB in the beginning and 37.3 MB in the end (delta: 2.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-16 02:46:21,230 INFO L168 Benchmark]: Boogie Preprocessor took 42.69 ms. Allocated memory is still 65.0 MB. Free memory was 37.3 MB in the beginning and 35.2 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-16 02:46:21,231 INFO L168 Benchmark]: RCFGBuilder took 1599.22 ms. Allocated memory is still 65.0 MB. Free memory was 35.2 MB in the beginning and 34.5 MB in the end (delta: 612.1 kB). Peak memory consumption was 12.5 MB. Max. memory is 16.1 GB. [2021-10-16 02:46:21,234 INFO L168 Benchmark]: TraceAbstraction took 39563.28 ms. Allocated memory was 65.0 MB in the beginning and 86.0 MB in the end (delta: 21.0 MB). Free memory was 34.3 MB in the beginning and 40.1 MB in the end (delta: -5.9 MB). Peak memory consumption was 15.8 MB. Max. memory is 16.1 GB. [2021-10-16 02:46:21,234 INFO L168 Benchmark]: Witness Printer took 5.17 ms. Allocated memory is still 86.0 MB. Free memory is still 39.4 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-16 02:46:21,236 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.28 ms. Allocated memory is still 65.0 MB. Free memory is still 45.0 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 562.93 ms. Allocated memory is still 65.0 MB. Free memory was 43.4 MB in the beginning and 39.6 MB in the end (delta: 3.8 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 52.88 ms. Allocated memory is still 65.0 MB. Free memory was 39.6 MB in the beginning and 37.3 MB in the end (delta: 2.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 42.69 ms. Allocated memory is still 65.0 MB. Free memory was 37.3 MB in the beginning and 35.2 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 1599.22 ms. Allocated memory is still 65.0 MB. Free memory was 35.2 MB in the beginning and 34.5 MB in the end (delta: 612.1 kB). Peak memory consumption was 12.5 MB. Max. memory is 16.1 GB. * TraceAbstraction took 39563.28 ms. Allocated memory was 65.0 MB in the beginning and 86.0 MB in the end (delta: 21.0 MB). Free memory was 34.3 MB in the beginning and 40.1 MB in the end (delta: -5.9 MB). Peak memory consumption was 15.8 MB. Max. memory is 16.1 GB. * Witness Printer took 5.17 ms. Allocated memory is still 86.0 MB. Free memory is still 39.4 MB. There was no memory consumed. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 1050]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: unable to decide satisfiability of path constraint. Possible FailurePath: [L1006] struct TSLL* null = malloc(sizeof(struct TSLL)); [L1007] null->next = ((void*)0) [L1008] null->prev = ((void*)0) [L1009] null->colour = BLACK [L1011] struct TSLL* list = malloc(sizeof(struct TSLL)); [L1012] list->next = null [L1013] list->prev = null [L1014] list->colour = BLACK [L1016] struct TSLL* end = list; [L1019] COND TRUE __VERIFIER_nondet_int() [L1022] end->next = malloc(sizeof(struct TSLL)) [L1023] EXPR end->next [L1023] end->next->prev = end [L1024] EXPR end->next [L1024] end = end->next [L1025] end->next = null [L1027] COND FALSE !(__VERIFIER_nondet_int()) [L1033] end->colour = RED [L1034] end->next = malloc(sizeof(struct TSLL)) [L1035] EXPR end->next [L1035] end->next->prev = end [L1036] EXPR end->next [L1036] end = end->next [L1037] end->next = null [L1038] end->colour = BLACK [L1040] EXPR end->colour [L1040] COND FALSE !(!(BLACK == end->colour)) [L1041] EXPR end->next [L1041] COND FALSE !(!(null == end->next)) [L1042] COND FALSE !(!(null != end)) [L1019] COND FALSE !(__VERIFIER_nondet_int()) [L1045] end = null [L1046] end = list [L1049] COND FALSE !(!(null != end)) [L1050] EXPR end->colour [L1050] COND TRUE !(BLACK == end->colour) [L1050] reach_error() - UnprovableResult [Line: 1040]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: Not analyzed. - UnprovableResult [Line: 1041]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: Not analyzed. - UnprovableResult [Line: 1042]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: Not analyzed. - UnprovableResult [Line: 1049]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: Not analyzed. - UnprovableResult [Line: 1056]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: Not analyzed. - UnprovableResult [Line: 1057]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 46 locations, 7 error locations. Started 1 CEGAR loops. OverallTime: 39487.4ms, OverallIterations: 9, TraceHistogramMax: 2, EmptinessCheckTime: 33.6ms, AutomataDifference: 19729.5ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 9.0ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 246 SDtfs, 279 SDslu, 482 SDs, 0 SdLazy, 423 SolverSat, 62 SolverUnsat, 2 SolverUnknown, 0 SolverNotchecked, 18586.7ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 216 GetRequests, 168 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 5186.2ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=52occurred in iteration=4, InterpolantAutomatonStates: 42, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 81.8ms AutomataMinimizationTime, 8 MinimizatonAttempts, 53 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 142.9ms SsaConstructionTime, 539.3ms SatisfiabilityAnalysisTime, 14018.0ms InterpolantComputationTime, 111 NumberOfCodeBlocks, 111 NumberOfCodeBlocksAsserted, 10 NumberOfCheckSat, 202 ConstructedInterpolants, 6 QuantifiedInterpolants, 2694 SizeOfPredicates, 38 NumberOfNonLiveVariables, 597 ConjunctsInSsa, 60 ConjunctsInUnsatCore, 20 InterpolantComputations, 14 PerfectInterpolantSequences, 6/12 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2021-10-16 02:46:21,273 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27c4341a-bf93-46b1-838f-cd05a91b086a/bin/utaipan-mTDlp9Zugs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...