./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/heap-manipulation/dancing.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 57096758 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c87352-f820-4e99-96c8-75618c17bcd6/bin/utaipan-mTDlp9Zugs/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c87352-f820-4e99-96c8-75618c17bcd6/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_d0c87352-f820-4e99-96c8-75618c17bcd6/bin/utaipan-mTDlp9Zugs/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c87352-f820-4e99-96c8-75618c17bcd6/bin/utaipan-mTDlp9Zugs/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/heap-manipulation/dancing.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c87352-f820-4e99-96c8-75618c17bcd6/bin/utaipan-mTDlp9Zugs/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c87352-f820-4e99-96c8-75618c17bcd6/bin/utaipan-mTDlp9Zugs --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 61aa671d60c63a9c0aa1f89d5d2982cadbc06881 ...................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... 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_d0c87352-f820-4e99-96c8-75618c17bcd6/bin/utaipan-mTDlp9Zugs/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c87352-f820-4e99-96c8-75618c17bcd6/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_d0c87352-f820-4e99-96c8-75618c17bcd6/bin/utaipan-mTDlp9Zugs/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c87352-f820-4e99-96c8-75618c17bcd6/bin/utaipan-mTDlp9Zugs/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/heap-manipulation/dancing.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c87352-f820-4e99-96c8-75618c17bcd6/bin/utaipan-mTDlp9Zugs/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c87352-f820-4e99-96c8-75618c17bcd6/bin/utaipan-mTDlp9Zugs --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 61aa671d60c63a9c0aa1f89d5d2982cadbc06881 ......................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: ERROR: ExceptionOrErrorResult: IllegalStateException: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.smtlibutils.IncrementalPlicationChecker@246d845 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-5709675 [2021-10-16 02:53:24,766 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-16 02:53:24,768 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-16 02:53:24,827 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-16 02:53:24,827 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-16 02:53:24,829 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-16 02:53:24,831 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-16 02:53:24,834 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-16 02:53:24,836 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-16 02:53:24,838 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-16 02:53:24,839 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-16 02:53:24,841 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-16 02:53:24,842 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-16 02:53:24,843 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-16 02:53:24,846 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-16 02:53:24,847 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-16 02:53:24,849 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-16 02:53:24,850 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-16 02:53:24,853 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-16 02:53:24,861 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-16 02:53:24,863 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-16 02:53:24,871 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-16 02:53:24,873 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-16 02:53:24,874 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-16 02:53:24,879 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-16 02:53:24,879 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-16 02:53:24,880 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-16 02:53:24,881 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-16 02:53:24,882 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-16 02:53:24,883 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-16 02:53:24,884 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-16 02:53:24,885 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-16 02:53:24,886 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-16 02:53:24,887 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-16 02:53:24,888 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-16 02:53:24,889 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-16 02:53:24,890 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-16 02:53:24,891 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-16 02:53:24,891 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-16 02:53:24,892 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-16 02:53:24,893 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-16 02:53:24,904 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c87352-f820-4e99-96c8-75618c17bcd6/bin/utaipan-mTDlp9Zugs/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2021-10-16 02:53:24,957 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-16 02:53:24,958 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-16 02:53:24,962 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-16 02:53:24,962 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-16 02:53:24,963 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-16 02:53:24,963 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-16 02:53:24,963 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-10-16 02:53:24,964 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-16 02:53:24,964 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-16 02:53:24,964 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-10-16 02:53:24,965 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-10-16 02:53:24,966 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-16 02:53:24,966 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-10-16 02:53:24,966 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-10-16 02:53:24,967 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-10-16 02:53:24,968 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-16 02:53:24,968 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-16 02:53:24,968 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-16 02:53:24,969 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-16 02:53:24,969 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-10-16 02:53:24,969 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-16 02:53:24,969 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-16 02:53:24,970 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-16 02:53:24,970 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-10-16 02:53:24,971 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-10-16 02:53:24,971 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-10-16 02:53:24,973 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-16 02:53:24,973 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-16 02:53:24,973 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-16 02:53:24,974 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-16 02:53:24,974 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-16 02:53:24,975 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-16 02:53:24,975 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-16 02:53:24,975 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-16 02:53:24,976 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-16 02:53:24,976 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-10-16 02:53:24,976 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-16 02:53:24,976 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-16 02:53:24,977 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-16 02:53:24,977 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_d0c87352-f820-4e99-96c8-75618c17bcd6/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c87352-f820-4e99-96c8-75618c17bcd6/bin/utaipan-mTDlp9Zugs Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 61aa671d60c63a9c0aa1f89d5d2982cadbc06881 [2021-10-16 02:53:25,323 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-16 02:53:25,354 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-16 02:53:25,357 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-16 02:53:25,359 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-16 02:53:25,360 INFO L275 PluginConnector]: CDTParser initialized [2021-10-16 02:53:25,361 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c87352-f820-4e99-96c8-75618c17bcd6/bin/utaipan-mTDlp9Zugs/../../sv-benchmarks/c/heap-manipulation/dancing.i [2021-10-16 02:53:25,441 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c87352-f820-4e99-96c8-75618c17bcd6/bin/utaipan-mTDlp9Zugs/data/e20a3d99f/4f08de0bf2fd4befb12e3e2a5c2df552/FLAG536b1557b [2021-10-16 02:53:26,029 INFO L306 CDTParser]: Found 1 translation units. [2021-10-16 02:53:26,030 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c87352-f820-4e99-96c8-75618c17bcd6/sv-benchmarks/c/heap-manipulation/dancing.i [2021-10-16 02:53:26,045 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c87352-f820-4e99-96c8-75618c17bcd6/bin/utaipan-mTDlp9Zugs/data/e20a3d99f/4f08de0bf2fd4befb12e3e2a5c2df552/FLAG536b1557b [2021-10-16 02:53:26,346 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c87352-f820-4e99-96c8-75618c17bcd6/bin/utaipan-mTDlp9Zugs/data/e20a3d99f/4f08de0bf2fd4befb12e3e2a5c2df552 [2021-10-16 02:53:26,349 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-16 02:53:26,350 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-16 02:53:26,353 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-16 02:53:26,353 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-16 02:53:26,358 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-16 02:53:26,359 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.10 02:53:26" (1/1) ... [2021-10-16 02:53:26,362 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@ded9e8b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:53:26, skipping insertion in model container [2021-10-16 02:53:26,363 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.10 02:53:26" (1/1) ... [2021-10-16 02:53:26,371 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-16 02:53:26,434 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-16 02:53:26,641 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_d0c87352-f820-4e99-96c8-75618c17bcd6/sv-benchmarks/c/heap-manipulation/dancing.i[938,951] [2021-10-16 02:53:26,816 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-16 02:53:26,831 INFO L203 MainTranslator]: Completed pre-run [2021-10-16 02:53:26,855 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_d0c87352-f820-4e99-96c8-75618c17bcd6/sv-benchmarks/c/heap-manipulation/dancing.i[938,951] [2021-10-16 02:53:26,922 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-16 02:53:26,973 INFO L208 MainTranslator]: Completed translation [2021-10-16 02:53:26,974 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:53:26 WrapperNode [2021-10-16 02:53:26,974 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-16 02:53:26,976 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-16 02:53:26,976 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-16 02:53:26,976 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-16 02:53:26,985 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:53:26" (1/1) ... [2021-10-16 02:53:27,026 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:53:26" (1/1) ... [2021-10-16 02:53:27,072 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-16 02:53:27,073 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-16 02:53:27,074 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-16 02:53:27,075 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-16 02:53:27,085 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:53:26" (1/1) ... [2021-10-16 02:53:27,085 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:53:26" (1/1) ... [2021-10-16 02:53:27,107 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:53:26" (1/1) ... [2021-10-16 02:53:27,108 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:53:26" (1/1) ... [2021-10-16 02:53:27,117 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:53:26" (1/1) ... [2021-10-16 02:53:27,133 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:53:26" (1/1) ... [2021-10-16 02:53:27,137 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:53:26" (1/1) ... [2021-10-16 02:53:27,152 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-16 02:53:27,153 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-16 02:53:27,153 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-16 02:53:27,153 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-16 02:53:27,155 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:53:26" (1/1) ... [2021-10-16 02:53:27,171 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-16 02:53:27,185 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c87352-f820-4e99-96c8-75618c17bcd6/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 02:53:27,199 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c87352-f820-4e99-96c8-75618c17bcd6/bin/utaipan-mTDlp9Zugs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-16 02:53:27,217 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c87352-f820-4e99-96c8-75618c17bcd6/bin/utaipan-mTDlp9Zugs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-16 02:53:27,255 INFO L130 BoogieDeclarations]: Found specification of procedure is_list_containing_x [2021-10-16 02:53:27,256 INFO L138 BoogieDeclarations]: Found implementation of procedure is_list_containing_x [2021-10-16 02:53:27,257 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-10-16 02:53:27,258 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-10-16 02:53:27,258 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-16 02:53:27,258 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-10-16 02:53:27,258 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-16 02:53:27,258 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-16 02:53:27,259 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-16 02:53:27,259 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-16 02:53:27,959 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-16 02:53:27,963 INFO L299 CfgBuilder]: Removed 15 assume(true) statements. [2021-10-16 02:53:27,967 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 02:53:27 BoogieIcfgContainer [2021-10-16 02:53:27,967 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-16 02:53:27,969 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-16 02:53:27,971 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-16 02:53:27,975 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-16 02:53:27,975 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.10 02:53:26" (1/3) ... [2021-10-16 02:53:27,976 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2160910d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.10 02:53:27, skipping insertion in model container [2021-10-16 02:53:27,976 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:53:26" (2/3) ... [2021-10-16 02:53:27,976 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2160910d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.10 02:53:27, skipping insertion in model container [2021-10-16 02:53:27,977 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 02:53:27" (3/3) ... [2021-10-16 02:53:27,978 INFO L111 eAbstractionObserver]: Analyzing ICFG dancing.i [2021-10-16 02:53:27,984 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-16 02:53:27,985 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 45 error locations. [2021-10-16 02:53:28,039 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-16 02:53:28,047 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-10-16 02:53:28,047 INFO L340 AbstractCegarLoop]: Starting to check reachability of 45 error locations. [2021-10-16 02:53:28,076 INFO L276 IsEmpty]: Start isEmpty. Operand has 97 states, 46 states have (on average 2.217391304347826) internal successors, (102), 91 states have internal predecessors, (102), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-10-16 02:53:28,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2021-10-16 02:53:28,084 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:53:28,084 INFO L512 BasicCegarLoop]: trace histogram [1, 1] [2021-10-16 02:53:28,086 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 41 more)] === [2021-10-16 02:53:28,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:53:28,094 INFO L82 PathProgramCache]: Analyzing trace with hash 6824, now seen corresponding path program 1 times [2021-10-16 02:53:28,107 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 02:53:28,109 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1454478423] [2021-10-16 02:53:28,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:53:28,110 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 02:53:28,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:53:28,353 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 02:53:28,354 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 02:53:28,354 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1454478423] [2021-10-16 02:53:28,355 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1454478423] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 02:53:28,355 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:53:28,356 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-10-16 02:53:28,367 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [743050132] [2021-10-16 02:53:28,373 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-16 02:53:28,374 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 02:53:28,396 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-16 02:53:28,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-16 02:53:28,402 INFO L87 Difference]: Start difference. First operand has 97 states, 46 states have (on average 2.217391304347826) internal successors, (102), 91 states have internal predecessors, (102), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 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 02:53:28,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:53:28,623 INFO L93 Difference]: Finished difference Result 95 states and 106 transitions. [2021-10-16 02:53:28,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-16 02:53:28,626 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 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 2 [2021-10-16 02:53:28,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:53:28,635 INFO L225 Difference]: With dead ends: 95 [2021-10-16 02:53:28,641 INFO L226 Difference]: Without dead ends: 94 [2021-10-16 02:53:28,643 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 12.0ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-16 02:53:28,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2021-10-16 02:53:28,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 94. [2021-10-16 02:53:28,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 46 states have (on average 2.108695652173913) internal successors, (97), 88 states have internal predecessors, (97), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-10-16 02:53:28,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 105 transitions. [2021-10-16 02:53:28,708 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 105 transitions. Word has length 2 [2021-10-16 02:53:28,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:53:28,709 INFO L470 AbstractCegarLoop]: Abstraction has 94 states and 105 transitions. [2021-10-16 02:53:28,709 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 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 02:53:28,709 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 105 transitions. [2021-10-16 02:53:28,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2021-10-16 02:53:28,710 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:53:28,710 INFO L512 BasicCegarLoop]: trace histogram [1, 1] [2021-10-16 02:53:28,710 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-16 02:53:28,711 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 41 more)] === [2021-10-16 02:53:28,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:53:28,712 INFO L82 PathProgramCache]: Analyzing trace with hash 6825, now seen corresponding path program 1 times [2021-10-16 02:53:28,712 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 02:53:28,713 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [503905766] [2021-10-16 02:53:28,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:53:28,713 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 02:53:28,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:53:28,794 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 02:53:28,795 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 02:53:28,795 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [503905766] [2021-10-16 02:53:28,795 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [503905766] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 02:53:28,796 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:53:28,796 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-10-16 02:53:28,796 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [484633278] [2021-10-16 02:53:28,797 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-16 02:53:28,798 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 02:53:28,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-16 02:53:28,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-16 02:53:28,799 INFO L87 Difference]: Start difference. First operand 94 states and 105 transitions. Second operand has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 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 02:53:28,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:53:28,964 INFO L93 Difference]: Finished difference Result 92 states and 103 transitions. [2021-10-16 02:53:28,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-16 02:53:28,965 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 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 2 [2021-10-16 02:53:28,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:53:28,967 INFO L225 Difference]: With dead ends: 92 [2021-10-16 02:53:28,968 INFO L226 Difference]: Without dead ends: 92 [2021-10-16 02:53:28,968 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 16.3ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-16 02:53:28,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2021-10-16 02:53:28,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 92. [2021-10-16 02:53:28,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 46 states have (on average 2.0652173913043477) internal successors, (95), 86 states have internal predecessors, (95), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-10-16 02:53:28,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 103 transitions. [2021-10-16 02:53:28,983 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 103 transitions. Word has length 2 [2021-10-16 02:53:28,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:53:28,984 INFO L470 AbstractCegarLoop]: Abstraction has 92 states and 103 transitions. [2021-10-16 02:53:28,984 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 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 02:53:28,984 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 103 transitions. [2021-10-16 02:53:28,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-10-16 02:53:28,985 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:53:28,985 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-10-16 02:53:28,985 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-16 02:53:28,985 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 41 more)] === [2021-10-16 02:53:28,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:53:28,986 INFO L82 PathProgramCache]: Analyzing trace with hash 2011745858, now seen corresponding path program 1 times [2021-10-16 02:53:28,987 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 02:53:28,987 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [786060250] [2021-10-16 02:53:28,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:53:28,987 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 02:53:29,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:53:29,054 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 02:53:29,054 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 02:53:29,055 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [786060250] [2021-10-16 02:53:29,055 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [786060250] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 02:53:29,055 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:53:29,055 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-16 02:53:29,056 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [945281892] [2021-10-16 02:53:29,056 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-16 02:53:29,056 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 02:53:29,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-16 02:53:29,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-16 02:53:29,058 INFO L87 Difference]: Start difference. First operand 92 states and 103 transitions. Second operand has 3 states, 2 states have (on average 3.0) 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 02:53:29,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:53:29,211 INFO L93 Difference]: Finished difference Result 154 states and 174 transitions. [2021-10-16 02:53:29,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-16 02:53:29,212 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.0) 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 02:53:29,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:53:29,215 INFO L225 Difference]: With dead ends: 154 [2021-10-16 02:53:29,215 INFO L226 Difference]: Without dead ends: 154 [2021-10-16 02:53:29,216 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.0ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-16 02:53:29,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2021-10-16 02:53:29,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 90. [2021-10-16 02:53:29,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 46 states have (on average 2.0217391304347827) internal successors, (93), 84 states have internal predecessors, (93), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-10-16 02:53:29,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 101 transitions. [2021-10-16 02:53:29,231 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 101 transitions. Word has length 6 [2021-10-16 02:53:29,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:53:29,231 INFO L470 AbstractCegarLoop]: Abstraction has 90 states and 101 transitions. [2021-10-16 02:53:29,232 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.0) 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 02:53:29,232 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 101 transitions. [2021-10-16 02:53:29,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-10-16 02:53:29,233 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:53:29,233 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-10-16 02:53:29,233 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-10-16 02:53:29,233 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 41 more)] === [2021-10-16 02:53:29,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:53:29,234 INFO L82 PathProgramCache]: Analyzing trace with hash 2011745859, now seen corresponding path program 1 times [2021-10-16 02:53:29,235 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 02:53:29,235 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [547549388] [2021-10-16 02:53:29,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:53:29,236 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 02:53:29,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:53:29,325 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 02:53:29,326 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 02:53:29,326 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [547549388] [2021-10-16 02:53:29,327 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [547549388] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 02:53:29,327 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:53:29,327 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-16 02:53:29,327 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2055416045] [2021-10-16 02:53:29,328 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-16 02:53:29,328 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 02:53:29,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-16 02:53:29,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-16 02:53:29,334 INFO L87 Difference]: Start difference. First operand 90 states and 101 transitions. Second operand has 3 states, 2 states have (on average 3.0) 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 02:53:29,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:53:29,506 INFO L93 Difference]: Finished difference Result 154 states and 173 transitions. [2021-10-16 02:53:29,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-16 02:53:29,507 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.0) 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 02:53:29,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:53:29,512 INFO L225 Difference]: With dead ends: 154 [2021-10-16 02:53:29,513 INFO L226 Difference]: Without dead ends: 154 [2021-10-16 02:53:29,515 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.6ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-16 02:53:29,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2021-10-16 02:53:29,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 88. [2021-10-16 02:53:29,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 46 states have (on average 1.9782608695652173) internal successors, (91), 82 states have internal predecessors, (91), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-10-16 02:53:29,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 99 transitions. [2021-10-16 02:53:29,541 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 99 transitions. Word has length 6 [2021-10-16 02:53:29,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:53:29,542 INFO L470 AbstractCegarLoop]: Abstraction has 88 states and 99 transitions. [2021-10-16 02:53:29,542 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.0) 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 02:53:29,542 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 99 transitions. [2021-10-16 02:53:29,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-10-16 02:53:29,543 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:53:29,543 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:53:29,544 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-10-16 02:53:29,544 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting is_list_containing_xErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 41 more)] === [2021-10-16 02:53:29,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:53:29,545 INFO L82 PathProgramCache]: Analyzing trace with hash 717900798, now seen corresponding path program 1 times [2021-10-16 02:53:29,546 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 02:53:29,546 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1182176788] [2021-10-16 02:53:29,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:53:29,547 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 02:53:29,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:53:29,649 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 02:53:29,649 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 02:53:29,649 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1182176788] [2021-10-16 02:53:29,650 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1182176788] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 02:53:29,650 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:53:29,650 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-10-16 02:53:29,651 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1560216345] [2021-10-16 02:53:29,651 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-16 02:53:29,651 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 02:53:29,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-16 02:53:29,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-16 02:53:29,653 INFO L87 Difference]: Start difference. First operand 88 states and 99 transitions. Second operand has 5 states, 5 states have (on average 1.4) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:53:29,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:53:29,736 INFO L93 Difference]: Finished difference Result 164 states and 187 transitions. [2021-10-16 02:53:29,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-16 02:53:29,736 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.4) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-10-16 02:53:29,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:53:29,740 INFO L225 Difference]: With dead ends: 164 [2021-10-16 02:53:29,740 INFO L226 Difference]: Without dead ends: 164 [2021-10-16 02:53:29,741 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 27.4ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-16 02:53:29,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2021-10-16 02:53:29,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 122. [2021-10-16 02:53:29,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 76 states have (on average 2.0657894736842106) internal successors, (157), 113 states have internal predecessors, (157), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2021-10-16 02:53:29,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 171 transitions. [2021-10-16 02:53:29,755 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 171 transitions. Word has length 8 [2021-10-16 02:53:29,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:53:29,756 INFO L470 AbstractCegarLoop]: Abstraction has 122 states and 171 transitions. [2021-10-16 02:53:29,756 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.4) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:53:29,756 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 171 transitions. [2021-10-16 02:53:29,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-10-16 02:53:29,757 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:53:29,757 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:53:29,758 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-10-16 02:53:29,758 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 41 more)] === [2021-10-16 02:53:29,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:53:29,759 INFO L82 PathProgramCache]: Analyzing trace with hash 552486246, now seen corresponding path program 1 times [2021-10-16 02:53:29,759 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 02:53:29,759 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [939564224] [2021-10-16 02:53:29,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:53:29,760 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 02:53:29,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:53:29,904 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:53:29,904 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 02:53:29,904 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [939564224] [2021-10-16 02:53:29,905 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [939564224] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 02:53:29,905 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:53:29,905 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-16 02:53:29,906 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1325134625] [2021-10-16 02:53:29,906 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-16 02:53:29,906 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 02:53:29,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-16 02:53:29,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-16 02:53:29,908 INFO L87 Difference]: Start difference. First operand 122 states and 171 transitions. Second operand has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:53:30,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:53:30,024 INFO L93 Difference]: Finished difference Result 121 states and 170 transitions. [2021-10-16 02:53:30,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-16 02:53:30,025 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-10-16 02:53:30,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:53:30,026 INFO L225 Difference]: With dead ends: 121 [2021-10-16 02:53:30,026 INFO L226 Difference]: Without dead ends: 121 [2021-10-16 02:53:30,027 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 26.2ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-16 02:53:30,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2021-10-16 02:53:30,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 121. [2021-10-16 02:53:30,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 76 states have (on average 2.0526315789473686) internal successors, (156), 112 states have internal predecessors, (156), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2021-10-16 02:53:30,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 170 transitions. [2021-10-16 02:53:30,035 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 170 transitions. Word has length 8 [2021-10-16 02:53:30,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:53:30,036 INFO L470 AbstractCegarLoop]: Abstraction has 121 states and 170 transitions. [2021-10-16 02:53:30,036 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:53:30,036 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 170 transitions. [2021-10-16 02:53:30,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-10-16 02:53:30,037 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:53:30,037 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:53:30,038 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-10-16 02:53:30,038 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 41 more)] === [2021-10-16 02:53:30,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:53:30,039 INFO L82 PathProgramCache]: Analyzing trace with hash 552486245, now seen corresponding path program 1 times [2021-10-16 02:53:30,039 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 02:53:30,039 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1394348493] [2021-10-16 02:53:30,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:53:30,040 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 02:53:30,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:53:30,117 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 02:53:30,118 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 02:53:30,118 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1394348493] [2021-10-16 02:53:30,118 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1394348493] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 02:53:30,119 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:53:30,119 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-16 02:53:30,119 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [488679623] [2021-10-16 02:53:30,120 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-16 02:53:30,120 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 02:53:30,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-16 02:53:30,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-10-16 02:53:30,121 INFO L87 Difference]: Start difference. First operand 121 states and 170 transitions. Second operand has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:53:30,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:53:30,229 INFO L93 Difference]: Finished difference Result 120 states and 169 transitions. [2021-10-16 02:53:30,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-16 02:53:30,230 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-10-16 02:53:30,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:53:30,231 INFO L225 Difference]: With dead ends: 120 [2021-10-16 02:53:30,231 INFO L226 Difference]: Without dead ends: 120 [2021-10-16 02:53:30,232 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 18.3ms TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-10-16 02:53:30,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2021-10-16 02:53:30,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 120. [2021-10-16 02:53:30,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 76 states have (on average 2.039473684210526) internal successors, (155), 111 states have internal predecessors, (155), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2021-10-16 02:53:30,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 169 transitions. [2021-10-16 02:53:30,240 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 169 transitions. Word has length 8 [2021-10-16 02:53:30,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:53:30,241 INFO L470 AbstractCegarLoop]: Abstraction has 120 states and 169 transitions. [2021-10-16 02:53:30,241 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:53:30,241 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 169 transitions. [2021-10-16 02:53:30,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-10-16 02:53:30,242 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:53:30,242 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:53:30,242 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-10-16 02:53:30,243 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 41 more)] === [2021-10-16 02:53:30,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:53:30,243 INFO L82 PathProgramCache]: Analyzing trace with hash -1954879465, now seen corresponding path program 1 times [2021-10-16 02:53:30,244 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 02:53:30,244 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [519784842] [2021-10-16 02:53:30,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:53:30,244 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 02:53:30,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:53:30,307 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 02:53:30,307 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 02:53:30,308 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [519784842] [2021-10-16 02:53:30,308 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [519784842] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 02:53:30,308 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:53:30,308 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-10-16 02:53:30,309 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [515749014] [2021-10-16 02:53:30,309 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-16 02:53:30,309 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 02:53:30,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-16 02:53:30,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-16 02:53:30,311 INFO L87 Difference]: Start difference. First operand 120 states and 169 transitions. Second operand has 6 states, 5 states have (on average 1.8) internal successors, (9), 5 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-16 02:53:30,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:53:30,547 INFO L93 Difference]: Finished difference Result 147 states and 167 transitions. [2021-10-16 02:53:30,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-16 02:53:30,548 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.8) internal successors, (9), 5 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2021-10-16 02:53:30,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:53:30,549 INFO L225 Difference]: With dead ends: 147 [2021-10-16 02:53:30,549 INFO L226 Difference]: Without dead ends: 147 [2021-10-16 02:53:30,550 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 33.2ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-10-16 02:53:30,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2021-10-16 02:53:30,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 115. [2021-10-16 02:53:30,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 76 states have (on average 1.894736842105263) internal successors, (144), 106 states have internal predecessors, (144), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2021-10-16 02:53:30,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 158 transitions. [2021-10-16 02:53:30,556 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 158 transitions. Word has length 11 [2021-10-16 02:53:30,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:53:30,556 INFO L470 AbstractCegarLoop]: Abstraction has 115 states and 158 transitions. [2021-10-16 02:53:30,556 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 1.8) internal successors, (9), 5 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-16 02:53:30,556 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 158 transitions. [2021-10-16 02:53:30,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-10-16 02:53:30,557 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:53:30,557 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:53:30,557 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-10-16 02:53:30,558 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 41 more)] === [2021-10-16 02:53:30,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:53:30,558 INFO L82 PathProgramCache]: Analyzing trace with hash -1954879464, now seen corresponding path program 1 times [2021-10-16 02:53:30,558 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 02:53:30,559 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [708672779] [2021-10-16 02:53:30,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:53:30,559 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 02:53:30,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:53:30,727 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 02:53:30,727 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 02:53:30,727 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [708672779] [2021-10-16 02:53:30,728 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [708672779] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 02:53:30,728 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:53:30,728 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-10-16 02:53:30,728 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1144241871] [2021-10-16 02:53:30,729 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-16 02:53:30,729 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 02:53:30,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-16 02:53:30,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-16 02:53:30,730 INFO L87 Difference]: Start difference. First operand 115 states and 158 transitions. Second operand has 6 states, 5 states have (on average 1.8) internal successors, (9), 5 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-16 02:53:31,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:53:31,013 INFO L93 Difference]: Finished difference Result 143 states and 162 transitions. [2021-10-16 02:53:31,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-16 02:53:31,013 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.8) internal successors, (9), 5 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2021-10-16 02:53:31,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:53:31,014 INFO L225 Difference]: With dead ends: 143 [2021-10-16 02:53:31,015 INFO L226 Difference]: Without dead ends: 143 [2021-10-16 02:53:31,015 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 75.7ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-10-16 02:53:31,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2021-10-16 02:53:31,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 115. [2021-10-16 02:53:31,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 76 states have (on average 1.8157894736842106) internal successors, (138), 106 states have internal predecessors, (138), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2021-10-16 02:53:31,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 152 transitions. [2021-10-16 02:53:31,021 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 152 transitions. Word has length 11 [2021-10-16 02:53:31,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:53:31,022 INFO L470 AbstractCegarLoop]: Abstraction has 115 states and 152 transitions. [2021-10-16 02:53:31,022 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 1.8) internal successors, (9), 5 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-16 02:53:31,022 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 152 transitions. [2021-10-16 02:53:31,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-10-16 02:53:31,023 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:53:31,023 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:53:31,023 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-10-16 02:53:31,023 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting is_list_containing_xErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 41 more)] === [2021-10-16 02:53:31,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:53:31,024 INFO L82 PathProgramCache]: Analyzing trace with hash -812073304, now seen corresponding path program 1 times [2021-10-16 02:53:31,024 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 02:53:31,024 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1484967904] [2021-10-16 02:53:31,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:53:31,025 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 02:53:31,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:53:31,123 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:53:31,123 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 02:53:31,124 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1484967904] [2021-10-16 02:53:31,124 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1484967904] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-16 02:53:31,124 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [506783838] [2021-10-16 02:53:31,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:53:31,125 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 02:53:31,125 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c87352-f820-4e99-96c8-75618c17bcd6/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 02:53:31,127 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c87352-f820-4e99-96c8-75618c17bcd6/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-16 02:53:31,133 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c87352-f820-4e99-96c8-75618c17bcd6/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-16 02:53:31,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:53:31,235 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-16 02:53:31,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:53:31,392 INFO L354 Elim1Store]: treesize reduction 83, result has 23.9 percent of original size [2021-10-16 02:53:31,393 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 31 [2021-10-16 02:53:32,122 INFO L354 Elim1Store]: treesize reduction 120, result has 23.6 percent of original size [2021-10-16 02:53:32,131 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 14 case distinctions, treesize of input 42 treesize of output 67 [2021-10-16 02:53:36,485 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:53:36,485 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:53:36,564 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:53:36,565 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [506783838] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-16 02:53:36,565 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2021-10-16 02:53:36,565 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [5] total 10 [2021-10-16 02:53:36,566 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1199332669] [2021-10-16 02:53:36,567 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-16 02:53:36,567 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 02:53:36,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-16 02:53:36,569 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-10-16 02:53:36,569 INFO L87 Difference]: Start difference. First operand 115 states and 152 transitions. Second operand has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 7 states have internal predecessors, (24), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:53:36,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:53:36,865 INFO L93 Difference]: Finished difference Result 127 states and 167 transitions. [2021-10-16 02:53:36,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-16 02:53:36,865 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 7 states have internal predecessors, (24), 2 states have call successors, (2), 2 states have call predecessors, (2), 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 02:53:36,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:53:36,867 INFO L225 Difference]: With dead ends: 127 [2021-10-16 02:53:36,867 INFO L226 Difference]: Without dead ends: 127 [2021-10-16 02:53:36,867 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 165.4ms TimeCoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-10-16 02:53:36,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2021-10-16 02:53:36,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 123. [2021-10-16 02:53:36,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 83 states have (on average 1.783132530120482) internal successors, (148), 112 states have internal predecessors, (148), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (8), 7 states have call predecessors, (8), 8 states have call successors, (8) [2021-10-16 02:53:36,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 164 transitions. [2021-10-16 02:53:36,873 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 164 transitions. Word has length 13 [2021-10-16 02:53:36,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:53:36,873 INFO L470 AbstractCegarLoop]: Abstraction has 123 states and 164 transitions. [2021-10-16 02:53:36,877 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 7 states have internal predecessors, (24), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:53:36,877 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 164 transitions. [2021-10-16 02:53:36,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-10-16 02:53:36,877 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:53:36,878 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:53:36,907 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c87352-f820-4e99-96c8-75618c17bcd6/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-10-16 02:53:37,102 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c87352-f820-4e99-96c8-75618c17bcd6/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-10-16 02:53:37,102 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting is_list_containing_xErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 41 more)] === [2021-10-16 02:53:37,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:53:37,103 INFO L82 PathProgramCache]: Analyzing trace with hash -812073303, now seen corresponding path program 1 times [2021-10-16 02:53:37,103 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 02:53:37,103 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1225162954] [2021-10-16 02:53:37,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:53:37,103 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 02:53:37,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:53:37,202 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:53:37,202 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 02:53:37,202 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1225162954] [2021-10-16 02:53:37,202 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1225162954] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-16 02:53:37,203 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1632995454] [2021-10-16 02:53:37,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:53:37,203 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 02:53:37,203 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c87352-f820-4e99-96c8-75618c17bcd6/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 02:53:37,218 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c87352-f820-4e99-96c8-75618c17bcd6/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-16 02:53:37,222 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c87352-f820-4e99-96c8-75618c17bcd6/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-10-16 02:53:37,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:53:37,340 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 29 conjunts are in the unsatisfiable core [2021-10-16 02:53:37,342 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:53:37,424 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-10-16 02:53:37,425 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 14 treesize of output 20 [2021-10-16 02:53:37,894 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:53:37,895 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:53:38,275 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 34 treesize of output 30 [2021-10-16 02:53:38,327 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:53:38,327 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1632995454] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:53:38,327 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [901742669] [2021-10-16 02:53:38,348 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2021-10-16 02:53:38,348 INFO L166 IcfgInterpreter]: Building call graph [2021-10-16 02:53:38,353 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-10-16 02:53:38,359 INFO L176 IcfgInterpreter]: Starting interpretation [2021-10-16 02:53:38,359 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-10-16 02:53:38,395 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 02:53:38,396 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-16 02:53:38,397 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 02:53:38,398 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 61 [2021-10-16 02:53:38,398 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-16 02:53:38,399 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 02:53:38,399 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-10-16 02:53:38,401 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 131 [2021-10-16 02:53:38,419 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 02:53:38,420 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 02:53:38,421 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 02:53:38,423 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 9 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 16 [2021-10-16 02:53:38,424 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 02:53:38,424 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-10-16 02:53:38,425 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 02:53:38,425 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-10-16 02:53:38,426 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-10-16 02:53:38,428 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-16 02:53:38,438 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 02:53:38,439 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 02:53:38,440 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 131 [2021-10-16 02:53:38,441 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-10-16 02:53:38,441 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:128, output treesize:131 [2021-10-16 02:53:38,481 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c87352-f820-4e99-96c8-75618c17bcd6/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-10-16 02:53:38,650 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c87352-f820-4e99-96c8-75618c17bcd6/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 02:53:38,650 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.AssertionError: No corresponding IProgramVar for |v_#valid_79| 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 02:53:38,654 INFO L168 Benchmark]: Toolchain (without parser) took 12303.53 ms. Allocated memory was 90.2 MB in the beginning and 132.1 MB in the end (delta: 41.9 MB). Free memory was 52.7 MB in the beginning and 51.5 MB in the end (delta: 1.2 MB). Peak memory consumption was 42.2 MB. Max. memory is 16.1 GB. [2021-10-16 02:53:38,654 INFO L168 Benchmark]: CDTParser took 0.30 ms. Allocated memory is still 90.2 MB. Free memory is still 70.2 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-16 02:53:38,655 INFO L168 Benchmark]: CACSL2BoogieTranslator took 621.95 ms. Allocated memory was 90.2 MB in the beginning and 109.1 MB in the end (delta: 18.9 MB). Free memory was 52.5 MB in the beginning and 77.1 MB in the end (delta: -24.6 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. [2021-10-16 02:53:38,655 INFO L168 Benchmark]: Boogie Procedure Inliner took 96.61 ms. Allocated memory is still 109.1 MB. Free memory was 77.1 MB in the beginning and 75.0 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-16 02:53:38,656 INFO L168 Benchmark]: Boogie Preprocessor took 78.77 ms. Allocated memory is still 109.1 MB. Free memory was 75.0 MB in the beginning and 73.2 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-16 02:53:38,656 INFO L168 Benchmark]: RCFGBuilder took 814.49 ms. Allocated memory is still 109.1 MB. Free memory was 73.2 MB in the beginning and 51.2 MB in the end (delta: 22.0 MB). Peak memory consumption was 21.0 MB. Max. memory is 16.1 GB. [2021-10-16 02:53:38,657 INFO L168 Benchmark]: TraceAbstraction took 10683.50 ms. Allocated memory was 109.1 MB in the beginning and 132.1 MB in the end (delta: 23.1 MB). Free memory was 50.5 MB in the beginning and 51.5 MB in the end (delta: -967.4 kB). Peak memory consumption was 23.6 MB. Max. memory is 16.1 GB. [2021-10-16 02:53:38,660 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.30 ms. Allocated memory is still 90.2 MB. Free memory is still 70.2 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 621.95 ms. Allocated memory was 90.2 MB in the beginning and 109.1 MB in the end (delta: 18.9 MB). Free memory was 52.5 MB in the beginning and 77.1 MB in the end (delta: -24.6 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 96.61 ms. Allocated memory is still 109.1 MB. Free memory was 77.1 MB in the beginning and 75.0 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 78.77 ms. Allocated memory is still 109.1 MB. Free memory was 75.0 MB in the beginning and 73.2 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 814.49 ms. Allocated memory is still 109.1 MB. Free memory was 73.2 MB in the beginning and 51.2 MB in the end (delta: 22.0 MB). Peak memory consumption was 21.0 MB. Max. memory is 16.1 GB. * TraceAbstraction took 10683.50 ms. Allocated memory was 109.1 MB in the beginning and 132.1 MB in the end (delta: 23.1 MB). Free memory was 50.5 MB in the beginning and 51.5 MB in the end (delta: -967.4 kB). Peak memory consumption was 23.6 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: AssertionError: No corresponding IProgramVar for |v_#valid_79| de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: AssertionError: No corresponding IProgramVar for |v_#valid_79|: 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 02:53:38,711 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c87352-f820-4e99-96c8-75618c17bcd6/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 02:53:41,574 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-16 02:53:41,578 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-16 02:53:41,662 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-16 02:53:41,663 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-16 02:53:41,668 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-16 02:53:41,670 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-16 02:53:41,675 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-16 02:53:41,679 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-16 02:53:41,688 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-16 02:53:41,690 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-16 02:53:41,692 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-16 02:53:41,692 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-16 02:53:41,695 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-16 02:53:41,698 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-16 02:53:41,704 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-16 02:53:41,705 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-16 02:53:41,706 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-16 02:53:41,708 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-16 02:53:41,718 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-16 02:53:41,720 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-16 02:53:41,722 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-16 02:53:41,725 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-16 02:53:41,726 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-16 02:53:41,730 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-16 02:53:41,731 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-16 02:53:41,731 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-16 02:53:41,732 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-16 02:53:41,733 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-16 02:53:41,734 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-16 02:53:41,735 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-16 02:53:41,736 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-16 02:53:41,737 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-16 02:53:41,738 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-16 02:53:41,739 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-16 02:53:41,740 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-16 02:53:41,741 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-16 02:53:41,741 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-16 02:53:41,741 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-16 02:53:41,742 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-16 02:53:41,743 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-16 02:53:41,744 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c87352-f820-4e99-96c8-75618c17bcd6/bin/utaipan-mTDlp9Zugs/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf [2021-10-16 02:53:41,798 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-16 02:53:41,799 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-16 02:53:41,800 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-16 02:53:41,800 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-16 02:53:41,801 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-16 02:53:41,801 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-16 02:53:41,801 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-16 02:53:41,801 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-16 02:53:41,802 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-16 02:53:41,803 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-16 02:53:41,805 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-16 02:53:41,805 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-16 02:53:41,805 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-16 02:53:41,806 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-10-16 02:53:41,806 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-16 02:53:41,806 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-16 02:53:41,806 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-16 02:53:41,806 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-10-16 02:53:41,807 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-10-16 02:53:41,807 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-10-16 02:53:41,807 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-16 02:53:41,807 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-16 02:53:41,808 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-10-16 02:53:41,808 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-10-16 02:53:41,808 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-16 02:53:41,808 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-16 02:53:41,809 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-16 02:53:41,809 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-16 02:53:41,809 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-16 02:53:41,809 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-16 02:53:41,810 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-16 02:53:41,810 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-16 02:53:41,811 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-10-16 02:53:41,811 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-10-16 02:53:41,811 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-16 02:53:41,811 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-16 02:53:41,812 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_d0c87352-f820-4e99-96c8-75618c17bcd6/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c87352-f820-4e99-96c8-75618c17bcd6/bin/utaipan-mTDlp9Zugs Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 61aa671d60c63a9c0aa1f89d5d2982cadbc06881 [2021-10-16 02:53:42,347 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-16 02:53:42,384 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-16 02:53:42,388 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-16 02:53:42,389 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-16 02:53:42,390 INFO L275 PluginConnector]: CDTParser initialized [2021-10-16 02:53:42,391 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c87352-f820-4e99-96c8-75618c17bcd6/bin/utaipan-mTDlp9Zugs/../../sv-benchmarks/c/heap-manipulation/dancing.i [2021-10-16 02:53:42,482 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c87352-f820-4e99-96c8-75618c17bcd6/bin/utaipan-mTDlp9Zugs/data/5942fe23d/6182490d53c64c6fbc6346169edb642a/FLAGa36ce64f4 [2021-10-16 02:53:43,272 INFO L306 CDTParser]: Found 1 translation units. [2021-10-16 02:53:43,273 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c87352-f820-4e99-96c8-75618c17bcd6/sv-benchmarks/c/heap-manipulation/dancing.i [2021-10-16 02:53:43,300 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c87352-f820-4e99-96c8-75618c17bcd6/bin/utaipan-mTDlp9Zugs/data/5942fe23d/6182490d53c64c6fbc6346169edb642a/FLAGa36ce64f4 [2021-10-16 02:53:43,507 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c87352-f820-4e99-96c8-75618c17bcd6/bin/utaipan-mTDlp9Zugs/data/5942fe23d/6182490d53c64c6fbc6346169edb642a [2021-10-16 02:53:43,511 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-16 02:53:43,513 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-16 02:53:43,518 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-16 02:53:43,518 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-16 02:53:43,523 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-16 02:53:43,524 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.10 02:53:43" (1/1) ... [2021-10-16 02:53:43,525 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@56abab5c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:53:43, skipping insertion in model container [2021-10-16 02:53:43,527 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.10 02:53:43" (1/1) ... [2021-10-16 02:53:43,536 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-16 02:53:43,606 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-16 02:53:43,813 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_d0c87352-f820-4e99-96c8-75618c17bcd6/sv-benchmarks/c/heap-manipulation/dancing.i[938,951] [2021-10-16 02:53:44,092 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-16 02:53:44,111 INFO L203 MainTranslator]: Completed pre-run [2021-10-16 02:53:44,133 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_d0c87352-f820-4e99-96c8-75618c17bcd6/sv-benchmarks/c/heap-manipulation/dancing.i[938,951] [2021-10-16 02:53:44,208 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-16 02:53:44,254 INFO L208 MainTranslator]: Completed translation [2021-10-16 02:53:44,255 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:53:44 WrapperNode [2021-10-16 02:53:44,255 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-16 02:53:44,256 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-16 02:53:44,256 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-16 02:53:44,257 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-16 02:53:44,265 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:53:44" (1/1) ... [2021-10-16 02:53:44,285 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:53:44" (1/1) ... [2021-10-16 02:53:44,316 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-16 02:53:44,317 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-16 02:53:44,318 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-16 02:53:44,318 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-16 02:53:44,329 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:53:44" (1/1) ... [2021-10-16 02:53:44,329 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:53:44" (1/1) ... [2021-10-16 02:53:44,335 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:53:44" (1/1) ... [2021-10-16 02:53:44,335 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:53:44" (1/1) ... [2021-10-16 02:53:44,350 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:53:44" (1/1) ... [2021-10-16 02:53:44,355 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:53:44" (1/1) ... [2021-10-16 02:53:44,359 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:53:44" (1/1) ... [2021-10-16 02:53:44,363 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-16 02:53:44,365 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-16 02:53:44,365 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-16 02:53:44,365 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-16 02:53:44,366 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:53:44" (1/1) ... [2021-10-16 02:53:44,375 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-16 02:53:44,388 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c87352-f820-4e99-96c8-75618c17bcd6/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 02:53:44,403 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c87352-f820-4e99-96c8-75618c17bcd6/bin/utaipan-mTDlp9Zugs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-16 02:53:44,423 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c87352-f820-4e99-96c8-75618c17bcd6/bin/utaipan-mTDlp9Zugs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-16 02:53:44,461 INFO L130 BoogieDeclarations]: Found specification of procedure is_list_containing_x [2021-10-16 02:53:44,462 INFO L138 BoogieDeclarations]: Found implementation of procedure is_list_containing_x [2021-10-16 02:53:44,462 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-10-16 02:53:44,462 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-10-16 02:53:44,462 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-16 02:53:44,464 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-10-16 02:53:44,464 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-16 02:53:44,464 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-10-16 02:53:44,465 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-16 02:53:44,465 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-16 02:53:45,390 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-16 02:53:45,391 INFO L299 CfgBuilder]: Removed 15 assume(true) statements. [2021-10-16 02:53:45,393 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 02:53:45 BoogieIcfgContainer [2021-10-16 02:53:45,393 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-16 02:53:45,395 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-16 02:53:45,396 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-16 02:53:45,399 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-16 02:53:45,399 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.10 02:53:43" (1/3) ... [2021-10-16 02:53:45,400 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@223fa245 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.10 02:53:45, skipping insertion in model container [2021-10-16 02:53:45,400 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:53:44" (2/3) ... [2021-10-16 02:53:45,401 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@223fa245 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.10 02:53:45, skipping insertion in model container [2021-10-16 02:53:45,401 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 02:53:45" (3/3) ... [2021-10-16 02:53:45,403 INFO L111 eAbstractionObserver]: Analyzing ICFG dancing.i [2021-10-16 02:53:45,409 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-16 02:53:45,409 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 45 error locations. [2021-10-16 02:53:45,459 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-16 02:53:45,466 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-10-16 02:53:45,467 INFO L340 AbstractCegarLoop]: Starting to check reachability of 45 error locations. [2021-10-16 02:53:45,487 INFO L276 IsEmpty]: Start isEmpty. Operand has 107 states, 56 states have (on average 2.0535714285714284) internal successors, (115), 101 states have internal predecessors, (115), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-10-16 02:53:45,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2021-10-16 02:53:45,505 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:53:45,506 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1] [2021-10-16 02:53:45,507 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 41 more)] === [2021-10-16 02:53:45,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:53:45,513 INFO L82 PathProgramCache]: Analyzing trace with hash 29857, now seen corresponding path program 1 times [2021-10-16 02:53:45,530 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:53:45,531 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1542209241] [2021-10-16 02:53:45,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:53:45,532 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:53:45,533 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c87352-f820-4e99-96c8-75618c17bcd6/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:53:45,537 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c87352-f820-4e99-96c8-75618c17bcd6/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:53:45,546 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c87352-f820-4e99-96c8-75618c17bcd6/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-10-16 02:53:45,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:53:45,637 INFO L263 TraceCheckSpWp]: Trace formula consists of 26 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-16 02:53:45,642 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:53:45,731 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-16 02:53:45,753 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 02:53:45,753 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:53:45,780 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 02:53:45,781 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:53:45,781 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1542209241] [2021-10-16 02:53:45,782 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1542209241] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-16 02:53:45,782 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:53:45,783 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-10-16 02:53:45,785 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1387323746] [2021-10-16 02:53:45,790 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-16 02:53:45,791 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:53:45,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-16 02:53:45,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-16 02:53:45,811 INFO L87 Difference]: Start difference. First operand has 107 states, 56 states have (on average 2.0535714285714284) internal successors, (115), 101 states have internal predecessors, (115), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:53:46,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:53:46,108 INFO L93 Difference]: Finished difference Result 105 states and 117 transitions. [2021-10-16 02:53:46,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-16 02:53:46,111 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2021-10-16 02:53:46,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:53:46,121 INFO L225 Difference]: With dead ends: 105 [2021-10-16 02:53:46,122 INFO L226 Difference]: Without dead ends: 103 [2021-10-16 02:53:46,124 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 10.4ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-16 02:53:46,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2021-10-16 02:53:46,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 103. [2021-10-16 02:53:46,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 55 states have (on average 1.9454545454545455) internal successors, (107), 97 states have internal predecessors, (107), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-10-16 02:53:46,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 115 transitions. [2021-10-16 02:53:46,174 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 115 transitions. Word has length 3 [2021-10-16 02:53:46,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:53:46,175 INFO L470 AbstractCegarLoop]: Abstraction has 103 states and 115 transitions. [2021-10-16 02:53:46,175 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:53:46,175 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 115 transitions. [2021-10-16 02:53:46,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2021-10-16 02:53:46,176 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:53:46,176 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1] [2021-10-16 02:53:46,194 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c87352-f820-4e99-96c8-75618c17bcd6/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-10-16 02:53:46,390 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c87352-f820-4e99-96c8-75618c17bcd6/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 02:53:46,390 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 41 more)] === [2021-10-16 02:53:46,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:53:46,391 INFO L82 PathProgramCache]: Analyzing trace with hash 29858, now seen corresponding path program 1 times [2021-10-16 02:53:46,392 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:53:46,392 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1701998279] [2021-10-16 02:53:46,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:53:46,393 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:53:46,393 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c87352-f820-4e99-96c8-75618c17bcd6/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:53:46,394 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c87352-f820-4e99-96c8-75618c17bcd6/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:53:46,413 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c87352-f820-4e99-96c8-75618c17bcd6/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-10-16 02:53:46,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:53:46,466 INFO L263 TraceCheckSpWp]: Trace formula consists of 26 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-16 02:53:46,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:53:46,484 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-16 02:53:46,503 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 02:53:46,503 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:53:46,571 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 02:53:46,572 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:53:46,573 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1701998279] [2021-10-16 02:53:46,574 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1701998279] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-16 02:53:46,575 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:53:46,575 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 3 [2021-10-16 02:53:46,576 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1398562836] [2021-10-16 02:53:46,577 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-16 02:53:46,578 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:53:46,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-16 02:53:46,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-16 02:53:46,582 INFO L87 Difference]: Start difference. First operand 103 states and 115 transitions. Second operand has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 4 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 02:53:46,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:53:46,941 INFO L93 Difference]: Finished difference Result 101 states and 113 transitions. [2021-10-16 02:53:46,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-16 02:53:46,942 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 4 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 3 [2021-10-16 02:53:46,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:53:46,944 INFO L225 Difference]: With dead ends: 101 [2021-10-16 02:53:46,945 INFO L226 Difference]: Without dead ends: 101 [2021-10-16 02:53:46,945 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 36.8ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-16 02:53:46,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2021-10-16 02:53:46,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 101. [2021-10-16 02:53:46,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 55 states have (on average 1.9090909090909092) internal successors, (105), 95 states have internal predecessors, (105), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-10-16 02:53:46,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 113 transitions. [2021-10-16 02:53:46,958 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 113 transitions. Word has length 3 [2021-10-16 02:53:46,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:53:46,959 INFO L470 AbstractCegarLoop]: Abstraction has 101 states and 113 transitions. [2021-10-16 02:53:46,959 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 4 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 02:53:46,959 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 113 transitions. [2021-10-16 02:53:46,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-10-16 02:53:46,960 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:53:46,960 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:53:46,981 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c87352-f820-4e99-96c8-75618c17bcd6/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-10-16 02:53:47,181 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c87352-f820-4e99-96c8-75618c17bcd6/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 02:53:47,182 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 41 more)] === [2021-10-16 02:53:47,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:53:47,183 INFO L82 PathProgramCache]: Analyzing trace with hash 59267633, now seen corresponding path program 1 times [2021-10-16 02:53:47,184 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:53:47,185 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [785999449] [2021-10-16 02:53:47,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:53:47,185 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:53:47,185 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c87352-f820-4e99-96c8-75618c17bcd6/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:53:47,187 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c87352-f820-4e99-96c8-75618c17bcd6/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:53:47,210 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c87352-f820-4e99-96c8-75618c17bcd6/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-10-16 02:53:47,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:53:47,274 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-16 02:53:47,275 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:53:47,296 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-16 02:53:47,308 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 02:53:47,308 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:53:47,345 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:53:47,346 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:53:47,346 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [785999449] [2021-10-16 02:53:47,346 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [785999449] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-16 02:53:47,347 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:53:47,347 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-10-16 02:53:47,347 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [98822771] [2021-10-16 02:53:47,348 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-16 02:53:47,348 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:53:47,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-16 02:53:47,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-16 02:53:47,350 INFO L87 Difference]: Start difference. First operand 101 states and 113 transitions. Second operand has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:53:47,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:53:47,759 INFO L93 Difference]: Finished difference Result 169 states and 190 transitions. [2021-10-16 02:53:47,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-16 02:53:47,760 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-10-16 02:53:47,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:53:47,762 INFO L225 Difference]: With dead ends: 169 [2021-10-16 02:53:47,763 INFO L226 Difference]: Without dead ends: 169 [2021-10-16 02:53:47,763 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.4ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-16 02:53:47,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2021-10-16 02:53:47,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 99. [2021-10-16 02:53:47,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 55 states have (on average 1.8727272727272728) internal successors, (103), 93 states have internal predecessors, (103), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-10-16 02:53:47,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 111 transitions. [2021-10-16 02:53:47,785 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 111 transitions. Word has length 8 [2021-10-16 02:53:47,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:53:47,785 INFO L470 AbstractCegarLoop]: Abstraction has 99 states and 111 transitions. [2021-10-16 02:53:47,786 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:53:47,786 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 111 transitions. [2021-10-16 02:53:47,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-10-16 02:53:47,787 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:53:47,788 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:53:47,801 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c87352-f820-4e99-96c8-75618c17bcd6/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-10-16 02:53:48,000 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c87352-f820-4e99-96c8-75618c17bcd6/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 02:53:48,000 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 41 more)] === [2021-10-16 02:53:48,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:53:48,001 INFO L82 PathProgramCache]: Analyzing trace with hash 59267634, now seen corresponding path program 1 times [2021-10-16 02:53:48,002 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:53:48,002 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1844673166] [2021-10-16 02:53:48,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:53:48,002 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:53:48,003 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c87352-f820-4e99-96c8-75618c17bcd6/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:53:48,005 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c87352-f820-4e99-96c8-75618c17bcd6/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:53:48,007 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c87352-f820-4e99-96c8-75618c17bcd6/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-10-16 02:53:48,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:53:48,077 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-16 02:53:48,078 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:53:48,105 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-16 02:53:48,131 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 02:53:48,131 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:53:48,208 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 02:53:48,209 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:53:48,209 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1844673166] [2021-10-16 02:53:48,209 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1844673166] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-16 02:53:48,209 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:53:48,210 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 3 [2021-10-16 02:53:48,210 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [618661290] [2021-10-16 02:53:48,210 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-16 02:53:48,211 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:53:48,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-16 02:53:48,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-16 02:53:48,212 INFO L87 Difference]: Start difference. First operand 99 states and 111 transitions. Second operand has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 4 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 02:53:48,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:53:48,810 INFO L93 Difference]: Finished difference Result 169 states and 189 transitions. [2021-10-16 02:53:48,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-16 02:53:48,812 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 4 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 8 [2021-10-16 02:53:48,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:53:48,814 INFO L225 Difference]: With dead ends: 169 [2021-10-16 02:53:48,814 INFO L226 Difference]: Without dead ends: 169 [2021-10-16 02:53:48,815 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 32.1ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-16 02:53:48,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2021-10-16 02:53:48,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 97. [2021-10-16 02:53:48,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 55 states have (on average 1.8363636363636364) internal successors, (101), 91 states have internal predecessors, (101), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-10-16 02:53:48,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 109 transitions. [2021-10-16 02:53:48,834 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 109 transitions. Word has length 8 [2021-10-16 02:53:48,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:53:48,834 INFO L470 AbstractCegarLoop]: Abstraction has 97 states and 109 transitions. [2021-10-16 02:53:48,835 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 4 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 02:53:48,835 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 109 transitions. [2021-10-16 02:53:48,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-10-16 02:53:48,836 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:53:48,836 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:53:48,854 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c87352-f820-4e99-96c8-75618c17bcd6/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-10-16 02:53:49,049 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c87352-f820-4e99-96c8-75618c17bcd6/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 02:53:49,049 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting is_list_containing_xErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 41 more)] === [2021-10-16 02:53:49,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:53:49,050 INFO L82 PathProgramCache]: Analyzing trace with hash 1124495229, now seen corresponding path program 1 times [2021-10-16 02:53:49,050 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:53:49,051 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1838915814] [2021-10-16 02:53:49,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:53:49,051 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:53:49,052 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c87352-f820-4e99-96c8-75618c17bcd6/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:53:49,052 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c87352-f820-4e99-96c8-75618c17bcd6/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:53:49,055 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c87352-f820-4e99-96c8-75618c17bcd6/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-10-16 02:53:49,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:53:49,146 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 12 conjunts are in the unsatisfiable core [2021-10-16 02:53:49,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:53:49,312 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 02:53:49,312 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:53:49,433 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 02:53:49,433 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:53:49,433 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1838915814] [2021-10-16 02:53:49,434 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1838915814] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-16 02:53:49,434 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:53:49,434 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 5] imperfect sequences [] total 9 [2021-10-16 02:53:49,434 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1799267436] [2021-10-16 02:53:49,435 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-16 02:53:49,435 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:53:49,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-16 02:53:49,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-10-16 02:53:49,436 INFO L87 Difference]: Start difference. First operand 97 states and 109 transitions. Second operand has 9 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 7 states have internal predecessors, (16), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:53:49,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:53:49,677 INFO L93 Difference]: Finished difference Result 180 states and 205 transitions. [2021-10-16 02:53:49,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-16 02:53:49,678 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 7 states have internal predecessors, (16), 2 states have call successors, (2), 2 states have call predecessors, (2), 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 02:53:49,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:53:49,681 INFO L225 Difference]: With dead ends: 180 [2021-10-16 02:53:49,681 INFO L226 Difference]: Without dead ends: 180 [2021-10-16 02:53:49,683 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 114.6ms TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-10-16 02:53:49,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2021-10-16 02:53:49,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 141. [2021-10-16 02:53:49,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 95 states have (on average 1.894736842105263) internal successors, (180), 132 states have internal predecessors, (180), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2021-10-16 02:53:49,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 194 transitions. [2021-10-16 02:53:49,706 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 194 transitions. Word has length 10 [2021-10-16 02:53:49,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:53:49,707 INFO L470 AbstractCegarLoop]: Abstraction has 141 states and 194 transitions. [2021-10-16 02:53:49,707 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 7 states have internal predecessors, (16), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:53:49,707 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 194 transitions. [2021-10-16 02:53:49,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-10-16 02:53:49,708 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:53:49,708 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:53:49,726 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c87352-f820-4e99-96c8-75618c17bcd6/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-10-16 02:53:49,908 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c87352-f820-4e99-96c8-75618c17bcd6/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 02:53:49,909 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 41 more)] === [2021-10-16 02:53:49,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:53:49,909 INFO L82 PathProgramCache]: Analyzing trace with hash 1121620373, now seen corresponding path program 1 times [2021-10-16 02:53:49,910 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:53:49,910 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1753272176] [2021-10-16 02:53:49,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:53:49,910 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:53:49,910 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c87352-f820-4e99-96c8-75618c17bcd6/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:53:49,912 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c87352-f820-4e99-96c8-75618c17bcd6/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:53:49,913 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c87352-f820-4e99-96c8-75618c17bcd6/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-10-16 02:53:50,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:53:50,009 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-16 02:53:50,011 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:53:50,037 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-16 02:53:50,153 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-10-16 02:53:50,154 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 12 treesize of output 14 [2021-10-16 02:53:50,223 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 02:53:50,223 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:53:50,650 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 02:53:50,650 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:53:50,651 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1753272176] [2021-10-16 02:53:50,651 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1753272176] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-16 02:53:50,651 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:53:50,651 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 4] imperfect sequences [] total 6 [2021-10-16 02:53:50,652 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [338991655] [2021-10-16 02:53:50,652 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-16 02:53:50,652 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:53:50,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-16 02:53:50,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-10-16 02:53:50,654 INFO L87 Difference]: Start difference. First operand 141 states and 194 transitions. Second operand has 7 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 7 states have internal predecessors, (19), 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 02:53:51,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:53:51,172 INFO L93 Difference]: Finished difference Result 140 states and 192 transitions. [2021-10-16 02:53:51,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-16 02:53:51,175 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 7 states have internal predecessors, (19), 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 02:53:51,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:53:51,176 INFO L225 Difference]: With dead ends: 140 [2021-10-16 02:53:51,177 INFO L226 Difference]: Without dead ends: 140 [2021-10-16 02:53:51,177 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 279.5ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-10-16 02:53:51,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2021-10-16 02:53:51,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 140. [2021-10-16 02:53:51,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 95 states have (on average 1.8736842105263158) internal successors, (178), 131 states have internal predecessors, (178), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2021-10-16 02:53:51,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 192 transitions. [2021-10-16 02:53:51,200 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 192 transitions. Word has length 10 [2021-10-16 02:53:51,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:53:51,201 INFO L470 AbstractCegarLoop]: Abstraction has 140 states and 192 transitions. [2021-10-16 02:53:51,201 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 7 states have internal predecessors, (19), 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 02:53:51,201 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 192 transitions. [2021-10-16 02:53:51,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-10-16 02:53:51,202 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:53:51,202 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:53:51,222 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c87352-f820-4e99-96c8-75618c17bcd6/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-10-16 02:53:51,414 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c87352-f820-4e99-96c8-75618c17bcd6/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 02:53:51,415 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 41 more)] === [2021-10-16 02:53:51,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:53:51,415 INFO L82 PathProgramCache]: Analyzing trace with hash 1121620372, now seen corresponding path program 1 times [2021-10-16 02:53:51,416 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:53:51,416 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1599285783] [2021-10-16 02:53:51,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:53:51,416 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:53:51,416 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c87352-f820-4e99-96c8-75618c17bcd6/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:53:51,417 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c87352-f820-4e99-96c8-75618c17bcd6/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:53:51,418 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c87352-f820-4e99-96c8-75618c17bcd6/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-10-16 02:53:51,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:53:51,538 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-16 02:53:51,539 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:53:51,555 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-16 02:53:51,612 INFO L354 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2021-10-16 02:53:51,613 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 18 treesize of output 23 [2021-10-16 02:53:51,661 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 02:53:51,661 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:53:51,761 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 02:53:51,761 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:53:51,761 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1599285783] [2021-10-16 02:53:51,762 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1599285783] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-16 02:53:51,762 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:53:51,762 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-10-16 02:53:51,764 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1889044264] [2021-10-16 02:53:51,768 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-16 02:53:51,768 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:53:51,775 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-16 02:53:51,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-16 02:53:51,781 INFO L87 Difference]: Start difference. First operand 140 states and 192 transitions. Second operand has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 states have internal predecessors, (10), 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 02:53:52,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:53:52,037 INFO L93 Difference]: Finished difference Result 139 states and 190 transitions. [2021-10-16 02:53:52,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-16 02:53:52,038 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 states have internal predecessors, (10), 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 02:53:52,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:53:52,039 INFO L225 Difference]: With dead ends: 139 [2021-10-16 02:53:52,039 INFO L226 Difference]: Without dead ends: 139 [2021-10-16 02:53:52,040 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 8 SyntacticMatches, 8 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 55.1ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-16 02:53:52,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2021-10-16 02:53:52,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 139. [2021-10-16 02:53:52,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 95 states have (on average 1.8526315789473684) internal successors, (176), 130 states have internal predecessors, (176), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2021-10-16 02:53:52,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 190 transitions. [2021-10-16 02:53:52,049 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 190 transitions. Word has length 10 [2021-10-16 02:53:52,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:53:52,049 INFO L470 AbstractCegarLoop]: Abstraction has 139 states and 190 transitions. [2021-10-16 02:53:52,049 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 states have internal predecessors, (10), 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 02:53:52,050 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 190 transitions. [2021-10-16 02:53:52,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-10-16 02:53:52,050 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:53:52,051 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:53:52,071 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c87352-f820-4e99-96c8-75618c17bcd6/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-10-16 02:53:52,251 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c87352-f820-4e99-96c8-75618c17bcd6/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 02:53:52,251 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 41 more)] === [2021-10-16 02:53:52,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:53:52,252 INFO L82 PathProgramCache]: Analyzing trace with hash -676042672, now seen corresponding path program 1 times [2021-10-16 02:53:52,252 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:53:52,253 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [264046038] [2021-10-16 02:53:52,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:53:52,253 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:53:52,253 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c87352-f820-4e99-96c8-75618c17bcd6/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:53:52,254 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c87352-f820-4e99-96c8-75618c17bcd6/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:53:52,261 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c87352-f820-4e99-96c8-75618c17bcd6/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-10-16 02:53:52,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:53:52,354 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-16 02:53:52,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:53:52,364 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-16 02:53:52,499 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 02:53:52,500 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:53:52,590 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 02:53:52,591 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:53:52,591 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [264046038] [2021-10-16 02:53:52,591 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [264046038] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-16 02:53:52,591 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:53:52,592 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 5 [2021-10-16 02:53:52,592 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [308947779] [2021-10-16 02:53:52,592 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-16 02:53:52,592 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:53:52,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-16 02:53:52,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-10-16 02:53:52,595 INFO L87 Difference]: Start difference. First operand 139 states and 190 transitions. Second operand has 6 states, 5 states have (on average 3.2) internal successors, (16), 6 states have internal predecessors, (16), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-10-16 02:53:53,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:53:53,040 INFO L93 Difference]: Finished difference Result 163 states and 185 transitions. [2021-10-16 02:53:53,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-16 02:53:53,040 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.2) internal successors, (16), 6 states have internal predecessors, (16), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 15 [2021-10-16 02:53:53,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:53:53,042 INFO L225 Difference]: With dead ends: 163 [2021-10-16 02:53:53,042 INFO L226 Difference]: Without dead ends: 163 [2021-10-16 02:53:53,042 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 8 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 91.8ms TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-10-16 02:53:53,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2021-10-16 02:53:53,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 134. [2021-10-16 02:53:53,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 95 states have (on average 1.736842105263158) internal successors, (165), 125 states have internal predecessors, (165), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2021-10-16 02:53:53,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 179 transitions. [2021-10-16 02:53:53,049 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 179 transitions. Word has length 15 [2021-10-16 02:53:53,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:53:53,050 INFO L470 AbstractCegarLoop]: Abstraction has 134 states and 179 transitions. [2021-10-16 02:53:53,050 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.2) internal successors, (16), 6 states have internal predecessors, (16), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-10-16 02:53:53,050 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 179 transitions. [2021-10-16 02:53:53,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-10-16 02:53:53,051 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:53:53,051 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:53:53,065 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c87352-f820-4e99-96c8-75618c17bcd6/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (9)] Ended with exit code 0 [2021-10-16 02:53:53,262 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c87352-f820-4e99-96c8-75618c17bcd6/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 02:53:53,265 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 41 more)] === [2021-10-16 02:53:53,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:53:53,265 INFO L82 PathProgramCache]: Analyzing trace with hash -676042671, now seen corresponding path program 1 times [2021-10-16 02:53:53,265 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:53:53,266 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1144824147] [2021-10-16 02:53:53,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:53:53,266 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:53:53,266 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c87352-f820-4e99-96c8-75618c17bcd6/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:53:53,267 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c87352-f820-4e99-96c8-75618c17bcd6/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:53:53,269 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c87352-f820-4e99-96c8-75618c17bcd6/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-10-16 02:53:53,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:53:53,384 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-16 02:53:53,385 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:53:53,400 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-16 02:53:53,563 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 02:53:53,563 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:53:53,823 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 02:53:53,824 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:53:53,824 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1144824147] [2021-10-16 02:53:53,824 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1144824147] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-16 02:53:53,824 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:53:53,824 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 8 [2021-10-16 02:53:53,824 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [371677119] [2021-10-16 02:53:53,825 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-16 02:53:53,825 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:53:53,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-16 02:53:53,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-10-16 02:53:53,826 INFO L87 Difference]: Start difference. First operand 134 states and 179 transitions. Second operand has 9 states, 8 states have (on average 3.125) internal successors, (25), 9 states have internal predecessors, (25), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-10-16 02:53:55,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:53:55,060 INFO L93 Difference]: Finished difference Result 157 states and 178 transitions. [2021-10-16 02:53:55,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-16 02:53:55,061 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 3.125) internal successors, (25), 9 states have internal predecessors, (25), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 15 [2021-10-16 02:53:55,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:53:55,062 INFO L225 Difference]: With dead ends: 157 [2021-10-16 02:53:55,062 INFO L226 Difference]: Without dead ends: 157 [2021-10-16 02:53:55,063 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 295.3ms TimeCoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2021-10-16 02:53:55,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2021-10-16 02:53:55,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 132. [2021-10-16 02:53:55,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 95 states have (on average 1.6526315789473685) internal successors, (157), 123 states have internal predecessors, (157), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2021-10-16 02:53:55,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 171 transitions. [2021-10-16 02:53:55,075 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 171 transitions. Word has length 15 [2021-10-16 02:53:55,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:53:55,076 INFO L470 AbstractCegarLoop]: Abstraction has 132 states and 171 transitions. [2021-10-16 02:53:55,076 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 3.125) internal successors, (25), 9 states have internal predecessors, (25), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-10-16 02:53:55,076 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 171 transitions. [2021-10-16 02:53:55,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-10-16 02:53:55,078 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:53:55,078 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:53:55,094 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c87352-f820-4e99-96c8-75618c17bcd6/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-10-16 02:53:55,290 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c87352-f820-4e99-96c8-75618c17bcd6/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 02:53:55,290 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting is_list_containing_xErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 41 more)] === [2021-10-16 02:53:55,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:53:55,291 INFO L82 PathProgramCache]: Analyzing trace with hash 1007406096, now seen corresponding path program 1 times [2021-10-16 02:53:55,292 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:53:55,292 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [511902228] [2021-10-16 02:53:55,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:53:55,292 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:53:55,293 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c87352-f820-4e99-96c8-75618c17bcd6/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:53:55,294 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c87352-f820-4e99-96c8-75618c17bcd6/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:53:55,320 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c87352-f820-4e99-96c8-75618c17bcd6/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-10-16 02:53:55,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:53:55,425 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-16 02:53:55,427 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:53:55,514 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:53:55,514 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:53:55,571 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-10-16 02:53:55,571 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 20 [2021-10-16 02:53:55,601 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:53:55,601 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:53:55,601 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [511902228] [2021-10-16 02:53:55,601 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [511902228] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:53:55,601 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1270894183] [2021-10-16 02:53:55,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:53:55,602 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-16 02:53:55,602 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c87352-f820-4e99-96c8-75618c17bcd6/bin/utaipan-mTDlp9Zugs/cvc4 [2021-10-16 02:53:55,607 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c87352-f820-4e99-96c8-75618c17bcd6/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-16 02:53:55,608 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c87352-f820-4e99-96c8-75618c17bcd6/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (12)] Waiting until timeout for monitored process [2021-10-16 02:53:55,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:53:55,794 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-16 02:53:55,795 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:53:55,806 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 9 treesize of output 7 [2021-10-16 02:53:55,866 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:53:55,866 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:53:55,941 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-10-16 02:53:55,941 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 20 [2021-10-16 02:53:55,974 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:53:55,974 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1270894183] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:53:55,975 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1258812801] [2021-10-16 02:53:55,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:53:55,975 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 02:53:55,975 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c87352-f820-4e99-96c8-75618c17bcd6/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 02:53:55,982 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c87352-f820-4e99-96c8-75618c17bcd6/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-16 02:53:56,001 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c87352-f820-4e99-96c8-75618c17bcd6/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-10-16 02:53:56,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:53:56,177 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-16 02:53:56,179 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:53:56,248 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:53:56,249 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:53:56,316 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-10-16 02:53:56,317 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 20 [2021-10-16 02:53:56,348 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:53:56,348 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1258812801] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:53:56,348 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-16 02:53:56,348 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5, 5] total 5 [2021-10-16 02:53:56,348 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [53252058] [2021-10-16 02:53:56,349 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-16 02:53:56,349 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:53:56,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-16 02:53:56,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-10-16 02:53:56,350 INFO L87 Difference]: Start difference. First operand 132 states and 171 transitions. Second operand has 6 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:53:56,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:53:56,864 INFO L93 Difference]: Finished difference Result 144 states and 186 transitions. [2021-10-16 02:53:56,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-16 02:53:56,865 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-10-16 02:53:56,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:53:56,866 INFO L225 Difference]: With dead ends: 144 [2021-10-16 02:53:56,867 INFO L226 Difference]: Without dead ends: 144 [2021-10-16 02:53:56,867 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 77 SyntacticMatches, 9 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 97.4ms TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-10-16 02:53:56,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2021-10-16 02:53:56,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 140. [2021-10-16 02:53:56,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 102 states have (on average 1.6372549019607843) internal successors, (167), 129 states have internal predecessors, (167), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (8), 7 states have call predecessors, (8), 8 states have call successors, (8) [2021-10-16 02:53:56,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 183 transitions. [2021-10-16 02:53:56,875 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 183 transitions. Word has length 16 [2021-10-16 02:53:56,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:53:56,876 INFO L470 AbstractCegarLoop]: Abstraction has 140 states and 183 transitions. [2021-10-16 02:53:56,876 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:53:56,876 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 183 transitions. [2021-10-16 02:53:56,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-10-16 02:53:56,877 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:53:56,877 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:53:56,912 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c87352-f820-4e99-96c8-75618c17bcd6/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-10-16 02:53:57,109 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c87352-f820-4e99-96c8-75618c17bcd6/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-10-16 02:53:57,303 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c87352-f820-4e99-96c8-75618c17bcd6/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (12)] Forceful destruction successful, exit code 0 [2021-10-16 02:53:57,502 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c87352-f820-4e99-96c8-75618c17bcd6/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c87352-f820-4e99-96c8-75618c17bcd6/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c87352-f820-4e99-96c8-75618c17bcd6/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt [2021-10-16 02:53:57,502 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting is_list_containing_xErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 41 more)] === [2021-10-16 02:53:57,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:53:57,502 INFO L82 PathProgramCache]: Analyzing trace with hash 1007406097, now seen corresponding path program 1 times [2021-10-16 02:53:57,503 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:53:57,503 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [244196299] [2021-10-16 02:53:57,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:53:57,503 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:53:57,503 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c87352-f820-4e99-96c8-75618c17bcd6/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:53:57,505 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c87352-f820-4e99-96c8-75618c17bcd6/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:53:57,507 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c87352-f820-4e99-96c8-75618c17bcd6/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-10-16 02:53:57,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:53:57,693 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-16 02:53:57,694 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:53:57,900 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:53:57,900 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:53:58,193 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 02:53:58,194 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 28 [2021-10-16 02:53:58,541 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:53:58,541 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:53:58,542 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [244196299] [2021-10-16 02:53:58,542 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [244196299] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:53:58,542 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [297516398] [2021-10-16 02:53:58,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:53:58,542 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-16 02:53:58,542 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c87352-f820-4e99-96c8-75618c17bcd6/bin/utaipan-mTDlp9Zugs/cvc4 [2021-10-16 02:53:58,546 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c87352-f820-4e99-96c8-75618c17bcd6/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-16 02:53:58,549 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c87352-f820-4e99-96c8-75618c17bcd6/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (15)] Waiting until timeout for monitored process [2021-10-16 02:53:58,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:53:58,783 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-16 02:53:58,784 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:53:58,950 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:53:58,950 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:53:59,082 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 02:53:59,082 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 28 [2021-10-16 02:53:59,328 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:53:59,328 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [297516398] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:53:59,328 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1636021677] [2021-10-16 02:53:59,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:53:59,329 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 02:53:59,329 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c87352-f820-4e99-96c8-75618c17bcd6/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 02:53:59,330 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c87352-f820-4e99-96c8-75618c17bcd6/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-16 02:53:59,349 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c87352-f820-4e99-96c8-75618c17bcd6/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-10-16 02:53:59,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:53:59,540 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-16 02:53:59,542 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:53:59,706 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:53:59,706 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:53:59,822 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 02:53:59,822 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 28 [2021-10-16 02:54:00,072 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:54:00,073 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1636021677] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:54:00,073 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-16 02:54:00,073 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6, 6, 6, 6] total 11 [2021-10-16 02:54:00,073 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1528582956] [2021-10-16 02:54:00,074 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-16 02:54:00,074 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:54:00,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-16 02:54:00,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-10-16 02:54:00,075 INFO L87 Difference]: Start difference. First operand 140 states and 183 transitions. Second operand has 12 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 10 states have internal predecessors, (29), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:54:00,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:54:00,961 INFO L93 Difference]: Finished difference Result 141 states and 183 transitions. [2021-10-16 02:54:00,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-16 02:54:00,962 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 10 states have internal predecessors, (29), 2 states have call successors, (2), 2 states have call predecessors, (2), 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 02:54:00,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:54:00,964 INFO L225 Difference]: With dead ends: 141 [2021-10-16 02:54:00,964 INFO L226 Difference]: Without dead ends: 141 [2021-10-16 02:54:00,964 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 78 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 384.7ms TimeCoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2021-10-16 02:54:00,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2021-10-16 02:54:00,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 139. [2021-10-16 02:54:00,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 102 states have (on average 1.607843137254902) internal successors, (164), 128 states have internal predecessors, (164), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (8), 7 states have call predecessors, (8), 8 states have call successors, (8) [2021-10-16 02:54:00,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 180 transitions. [2021-10-16 02:54:00,971 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 180 transitions. Word has length 16 [2021-10-16 02:54:00,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:54:00,971 INFO L470 AbstractCegarLoop]: Abstraction has 139 states and 180 transitions. [2021-10-16 02:54:00,971 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 10 states have internal predecessors, (29), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:54:00,971 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 180 transitions. [2021-10-16 02:54:00,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-10-16 02:54:00,972 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:54:00,972 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 02:54:00,978 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c87352-f820-4e99-96c8-75618c17bcd6/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (15)] Forceful destruction successful, exit code 0 [2021-10-16 02:54:01,182 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c87352-f820-4e99-96c8-75618c17bcd6/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-10-16 02:54:01,397 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c87352-f820-4e99-96c8-75618c17bcd6/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-10-16 02:54:01,573 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c87352-f820-4e99-96c8-75618c17bcd6/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c87352-f820-4e99-96c8-75618c17bcd6/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c87352-f820-4e99-96c8-75618c17bcd6/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 02:54:01,574 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr16REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 41 more)] === [2021-10-16 02:54:01,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:54:01,574 INFO L82 PathProgramCache]: Analyzing trace with hash -1682703596, now seen corresponding path program 1 times [2021-10-16 02:54:01,574 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:54:01,574 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [673437713] [2021-10-16 02:54:01,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:54:01,575 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:54:01,575 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c87352-f820-4e99-96c8-75618c17bcd6/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:54:01,575 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c87352-f820-4e99-96c8-75618c17bcd6/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:54:01,578 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c87352-f820-4e99-96c8-75618c17bcd6/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-10-16 02:54:01,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:54:01,765 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-16 02:54:01,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:54:01,781 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 02:54:01,790 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 02:54:02,062 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 37 treesize of output 25 [2021-10-16 02:54:02,066 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 22 treesize of output 10 [2021-10-16 02:54:02,099 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 02:54:02,100 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:54:02,225 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 02:54:02,225 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:54:02,226 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [673437713] [2021-10-16 02:54:02,226 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [673437713] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-16 02:54:02,226 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:54:02,226 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 6] imperfect sequences [] total 7 [2021-10-16 02:54:02,226 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [27854544] [2021-10-16 02:54:02,226 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-16 02:54:02,226 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:54:02,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-16 02:54:02,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-10-16 02:54:02,227 INFO L87 Difference]: Start difference. First operand 139 states and 180 transitions. Second operand has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-10-16 02:54:16,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:54:16,966 INFO L93 Difference]: Finished difference Result 196 states and 244 transitions. [2021-10-16 02:54:16,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-16 02:54:16,966 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 19 [2021-10-16 02:54:16,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:54:16,968 INFO L225 Difference]: With dead ends: 196 [2021-10-16 02:54:16,968 INFO L226 Difference]: Without dead ends: 196 [2021-10-16 02:54:16,969 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 256.1ms TimeCoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2021-10-16 02:54:16,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2021-10-16 02:54:16,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 165. [2021-10-16 02:54:16,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 124 states have (on average 1.5887096774193548) internal successors, (197), 151 states have internal predecessors, (197), 11 states have call successors, (11), 4 states have call predecessors, (11), 4 states have return successors, (11), 9 states have call predecessors, (11), 11 states have call successors, (11) [2021-10-16 02:54:16,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 219 transitions. [2021-10-16 02:54:16,978 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 219 transitions. Word has length 19 [2021-10-16 02:54:16,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:54:16,978 INFO L470 AbstractCegarLoop]: Abstraction has 165 states and 219 transitions. [2021-10-16 02:54:16,979 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-10-16 02:54:16,979 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 219 transitions. [2021-10-16 02:54:16,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-10-16 02:54:16,980 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:54:16,980 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:54:17,002 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c87352-f820-4e99-96c8-75618c17bcd6/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-10-16 02:54:17,193 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c87352-f820-4e99-96c8-75618c17bcd6/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 02:54:17,194 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr24REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 41 more)] === [2021-10-16 02:54:17,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:54:17,194 INFO L82 PathProgramCache]: Analyzing trace with hash -1814435946, now seen corresponding path program 1 times [2021-10-16 02:54:17,194 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:54:17,194 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [255010652] [2021-10-16 02:54:17,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:54:17,195 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:54:17,195 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c87352-f820-4e99-96c8-75618c17bcd6/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:54:17,196 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c87352-f820-4e99-96c8-75618c17bcd6/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:54:17,198 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c87352-f820-4e99-96c8-75618c17bcd6/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-10-16 02:54:17,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:54:17,482 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 13 conjunts are in the unsatisfiable core [2021-10-16 02:54:17,485 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:54:17,502 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 11 treesize of output 7 [2021-10-16 02:54:17,510 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 11 treesize of output 7 [2021-10-16 02:54:17,568 INFO L354 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2021-10-16 02:54:17,568 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 21 treesize of output 20 [2021-10-16 02:54:17,586 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 02:54:17,587 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-10-16 02:54:18,219 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-10-16 02:54:18,219 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 02:54:18,226 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-10-16 02:54:18,226 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 02:54:18,268 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 02:54:18,268 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:54:18,516 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 02:54:18,517 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:54:18,517 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [255010652] [2021-10-16 02:54:18,517 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [255010652] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-16 02:54:18,517 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:54:18,517 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 6] imperfect sequences [] total 10 [2021-10-16 02:54:18,517 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1142708750] [2021-10-16 02:54:18,518 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-16 02:54:18,518 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:54:18,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-16 02:54:18,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-10-16 02:54:18,519 INFO L87 Difference]: Start difference. First operand 165 states and 219 transitions. Second operand has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-10-16 02:54:35,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:54:35,551 INFO L93 Difference]: Finished difference Result 191 states and 238 transitions. [2021-10-16 02:54:35,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-16 02:54:35,551 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 21 [2021-10-16 02:54:35,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:54:35,553 INFO L225 Difference]: With dead ends: 191 [2021-10-16 02:54:35,553 INFO L226 Difference]: Without dead ends: 191 [2021-10-16 02:54:35,554 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 553.2ms TimeCoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2021-10-16 02:54:35,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2021-10-16 02:54:35,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 165. [2021-10-16 02:54:35,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 124 states have (on average 1.5806451612903225) internal successors, (196), 151 states have internal predecessors, (196), 11 states have call successors, (11), 4 states have call predecessors, (11), 4 states have return successors, (11), 9 states have call predecessors, (11), 11 states have call successors, (11) [2021-10-16 02:54:35,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 218 transitions. [2021-10-16 02:54:35,562 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 218 transitions. Word has length 21 [2021-10-16 02:54:35,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:54:35,563 INFO L470 AbstractCegarLoop]: Abstraction has 165 states and 218 transitions. [2021-10-16 02:54:35,563 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-10-16 02:54:35,563 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 218 transitions. [2021-10-16 02:54:35,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-10-16 02:54:35,565 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:54:35,565 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:54:35,576 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c87352-f820-4e99-96c8-75618c17bcd6/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-10-16 02:54:35,774 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c87352-f820-4e99-96c8-75618c17bcd6/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 02:54:35,774 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 41 more)] === [2021-10-16 02:54:35,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:54:35,774 INFO L82 PathProgramCache]: Analyzing trace with hash -1300172899, now seen corresponding path program 1 times [2021-10-16 02:54:35,775 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:54:35,775 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [621618004] [2021-10-16 02:54:35,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:54:35,775 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:54:35,775 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c87352-f820-4e99-96c8-75618c17bcd6/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:54:35,776 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c87352-f820-4e99-96c8-75618c17bcd6/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:54:35,777 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c87352-f820-4e99-96c8-75618c17bcd6/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-10-16 02:54:36,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:54:36,044 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-16 02:54:36,045 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:54:36,053 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-16 02:54:36,100 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-16 02:54:36,100 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2021-10-16 02:54:36,237 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:54:36,237 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:54:36,434 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:54:36,435 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:54:36,435 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [621618004] [2021-10-16 02:54:36,435 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [621618004] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:54:36,435 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1554649990] [2021-10-16 02:54:36,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:54:36,436 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-16 02:54:36,436 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c87352-f820-4e99-96c8-75618c17bcd6/bin/utaipan-mTDlp9Zugs/cvc4 [2021-10-16 02:54:36,442 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c87352-f820-4e99-96c8-75618c17bcd6/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-16 02:54:36,449 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c87352-f820-4e99-96c8-75618c17bcd6/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (20)] Waiting until timeout for monitored process [2021-10-16 02:54:36,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:54:36,846 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-16 02:54:36,847 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:54:37,181 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:54:37,181 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:54:37,390 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:54:37,390 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1554649990] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:54:37,390 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2003910057] [2021-10-16 02:54:37,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:54:37,391 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 02:54:37,391 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c87352-f820-4e99-96c8-75618c17bcd6/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 02:54:37,394 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c87352-f820-4e99-96c8-75618c17bcd6/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-16 02:54:37,417 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c87352-f820-4e99-96c8-75618c17bcd6/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-10-16 02:54:37,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:54:37,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-16 02:54:37,711 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:54:37,720 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-16 02:54:37,765 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-16 02:54:37,766 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 17 [2021-10-16 02:54:37,843 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:54:37,843 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:54:38,035 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:54:38,035 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2003910057] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:54:38,035 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-16 02:54:38,035 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7, 7, 7, 7] total 12 [2021-10-16 02:54:38,036 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [809495320] [2021-10-16 02:54:38,036 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-16 02:54:38,036 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:54:38,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-16 02:54:38,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-10-16 02:54:38,038 INFO L87 Difference]: Start difference. First operand 165 states and 218 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-10-16 02:54:40,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:54:40,488 INFO L93 Difference]: Finished difference Result 240 states and 286 transitions. [2021-10-16 02:54:40,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-16 02:54:40,490 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 21 [2021-10-16 02:54:40,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:54:40,492 INFO L225 Difference]: With dead ends: 240 [2021-10-16 02:54:40,492 INFO L226 Difference]: Without dead ends: 238 [2021-10-16 02:54:40,493 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 96 SyntacticMatches, 14 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 442.9ms TimeCoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-10-16 02:54:40,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2021-10-16 02:54:40,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 165. [2021-10-16 02:54:40,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 124 states have (on average 1.5725806451612903) internal successors, (195), 151 states have internal predecessors, (195), 11 states have call successors, (11), 4 states have call predecessors, (11), 4 states have return successors, (11), 9 states have call predecessors, (11), 11 states have call successors, (11) [2021-10-16 02:54:40,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 217 transitions. [2021-10-16 02:54:40,503 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 217 transitions. Word has length 21 [2021-10-16 02:54:40,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:54:40,503 INFO L470 AbstractCegarLoop]: Abstraction has 165 states and 217 transitions. [2021-10-16 02:54:40,504 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-10-16 02:54:40,504 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 217 transitions. [2021-10-16 02:54:40,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-10-16 02:54:40,505 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:54:40,505 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:54:40,549 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c87352-f820-4e99-96c8-75618c17bcd6/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-10-16 02:54:40,731 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c87352-f820-4e99-96c8-75618c17bcd6/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (20)] Ended with exit code 0 [2021-10-16 02:54:40,937 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c87352-f820-4e99-96c8-75618c17bcd6/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (19)] Ended with exit code 0 [2021-10-16 02:54:41,127 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c87352-f820-4e99-96c8-75618c17bcd6/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c87352-f820-4e99-96c8-75618c17bcd6/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c87352-f820-4e99-96c8-75618c17bcd6/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 02:54:41,128 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting is_list_containing_xErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 41 more)] === [2021-10-16 02:54:41,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:54:41,128 INFO L82 PathProgramCache]: Analyzing trace with hash -2104198502, now seen corresponding path program 1 times [2021-10-16 02:54:41,129 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:54:41,129 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1312002192] [2021-10-16 02:54:41,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:54:41,129 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:54:41,129 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c87352-f820-4e99-96c8-75618c17bcd6/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:54:41,131 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c87352-f820-4e99-96c8-75618c17bcd6/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:54:41,184 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c87352-f820-4e99-96c8-75618c17bcd6/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-10-16 02:54:41,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:54:41,475 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 26 conjunts are in the unsatisfiable core [2021-10-16 02:54:41,476 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:54:41,616 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 02:54:41,627 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 02:54:41,978 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 46 treesize of output 28 [2021-10-16 02:54:41,982 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 25 treesize of output 13 [2021-10-16 02:54:42,157 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:54:42,158 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:54:42,697 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 35 treesize of output 29 [2021-10-16 02:54:42,712 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 02:54:42,714 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 02:54:42,771 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:54:42,771 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:54:42,771 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1312002192] [2021-10-16 02:54:42,772 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1312002192] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:54:42,772 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1614523958] [2021-10-16 02:54:42,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:54:42,772 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-16 02:54:42,772 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c87352-f820-4e99-96c8-75618c17bcd6/bin/utaipan-mTDlp9Zugs/cvc4 [2021-10-16 02:54:42,773 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c87352-f820-4e99-96c8-75618c17bcd6/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-16 02:54:42,778 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c87352-f820-4e99-96c8-75618c17bcd6/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (23)] Waiting until timeout for monitored process [2021-10-16 02:54:43,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:54:43,193 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 14 conjunts are in the unsatisfiable core [2021-10-16 02:54:43,194 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:54:43,437 INFO L354 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2021-10-16 02:54:43,438 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 24 [2021-10-16 02:54:43,678 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 23 treesize of output 19 [2021-10-16 02:54:44,202 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 46 treesize of output 38 [2021-10-16 02:54:44,412 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:54:44,412 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:54:44,873 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 84 treesize of output 78 [2021-10-16 02:54:45,259 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:54:45,260 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1614523958] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:54:45,260 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1433912531] [2021-10-16 02:54:45,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:54:45,260 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 02:54:45,261 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c87352-f820-4e99-96c8-75618c17bcd6/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 02:54:45,262 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c87352-f820-4e99-96c8-75618c17bcd6/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-16 02:54:45,281 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c87352-f820-4e99-96c8-75618c17bcd6/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-10-16 02:54:45,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:54:45,811 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 13 conjunts are in the unsatisfiable core [2021-10-16 02:54:45,813 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:54:46,099 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 23 treesize of output 19 [2021-10-16 02:54:46,468 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 28 treesize of output 20 [2021-10-16 02:54:46,535 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:54:46,536 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:54:46,766 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 82 treesize of output 76 [2021-10-16 02:54:47,012 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-10-16 02:54:47,013 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 70 treesize of output 67 [2021-10-16 02:54:47,072 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:54:47,072 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1433912531] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:54:47,072 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-16 02:54:47,073 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 11, 9, 10, 9] total 38 [2021-10-16 02:54:47,073 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [697540885] [2021-10-16 02:54:47,073 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2021-10-16 02:54:47,073 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:54:47,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-10-16 02:54:47,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=1286, Unknown=0, NotChecked=0, Total=1406 [2021-10-16 02:54:47,075 INFO L87 Difference]: Start difference. First operand 165 states and 217 transitions. Second operand has 38 states, 35 states have (on average 2.342857142857143) internal successors, (82), 30 states have internal predecessors, (82), 8 states have call successors, (8), 8 states have call predecessors, (8), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:54:55,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:54:55,852 INFO L93 Difference]: Finished difference Result 528 states and 672 transitions. [2021-10-16 02:54:55,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-10-16 02:54:55,853 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 35 states have (on average 2.342857142857143) internal successors, (82), 30 states have internal predecessors, (82), 8 states have call successors, (8), 8 states have call predecessors, (8), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-10-16 02:54:55,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:54:55,859 INFO L225 Difference]: With dead ends: 528 [2021-10-16 02:54:55,859 INFO L226 Difference]: Without dead ends: 528 [2021-10-16 02:54:55,861 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 82 SyntacticMatches, 8 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 675 ImplicationChecksByTransitivity, 3990.9ms TimeCoverageRelationStatistics Valid=321, Invalid=2435, Unknown=0, NotChecked=0, Total=2756 [2021-10-16 02:54:55,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 528 states. [2021-10-16 02:54:55,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 528 to 250. [2021-10-16 02:54:55,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 250 states, 194 states have (on average 1.5670103092783505) internal successors, (304), 224 states have internal predecessors, (304), 21 states have call successors, (21), 9 states have call predecessors, (21), 9 states have return successors, (21), 16 states have call predecessors, (21), 21 states have call successors, (21) [2021-10-16 02:54:55,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 346 transitions. [2021-10-16 02:54:55,890 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 346 transitions. Word has length 22 [2021-10-16 02:54:55,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:54:55,891 INFO L470 AbstractCegarLoop]: Abstraction has 250 states and 346 transitions. [2021-10-16 02:54:55,891 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 35 states have (on average 2.342857142857143) internal successors, (82), 30 states have internal predecessors, (82), 8 states have call successors, (8), 8 states have call predecessors, (8), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:54:55,891 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 346 transitions. [2021-10-16 02:54:55,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-10-16 02:54:55,894 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:54:55,894 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:54:55,901 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c87352-f820-4e99-96c8-75618c17bcd6/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (23)] Forceful destruction successful, exit code 0 [2021-10-16 02:54:56,107 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c87352-f820-4e99-96c8-75618c17bcd6/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2021-10-16 02:54:56,325 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c87352-f820-4e99-96c8-75618c17bcd6/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2021-10-16 02:54:56,498 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c87352-f820-4e99-96c8-75618c17bcd6/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c87352-f820-4e99-96c8-75618c17bcd6/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c87352-f820-4e99-96c8-75618c17bcd6/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 02:54:56,498 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr26ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 41 more)] === [2021-10-16 02:54:56,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:54:56,499 INFO L82 PathProgramCache]: Analyzing trace with hash 439738587, now seen corresponding path program 1 times [2021-10-16 02:54:56,499 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:54:56,499 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1873927227] [2021-10-16 02:54:56,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:54:56,499 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:54:56,499 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c87352-f820-4e99-96c8-75618c17bcd6/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:54:56,500 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c87352-f820-4e99-96c8-75618c17bcd6/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:54:56,501 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c87352-f820-4e99-96c8-75618c17bcd6/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2021-10-16 02:54:56,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:54:56,811 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-16 02:54:56,812 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:54:57,010 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 02:54:57,010 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:54:57,193 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 02:54:57,193 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:54:57,193 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1873927227] [2021-10-16 02:54:57,193 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1873927227] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-16 02:54:57,193 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:54:57,194 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 6 [2021-10-16 02:54:57,194 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1854866157] [2021-10-16 02:54:57,194 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-16 02:54:57,194 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:54:57,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-16 02:54:57,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-10-16 02:54:57,195 INFO L87 Difference]: Start difference. First operand 250 states and 346 transitions. Second operand has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 states have internal predecessors, (23), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-16 02:54:57,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:54:57,388 INFO L93 Difference]: Finished difference Result 308 states and 396 transitions. [2021-10-16 02:54:57,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-16 02:54:57,389 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 states have internal predecessors, (23), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 23 [2021-10-16 02:54:57,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:54:57,395 INFO L225 Difference]: With dead ends: 308 [2021-10-16 02:54:57,395 INFO L226 Difference]: Without dead ends: 308 [2021-10-16 02:54:57,395 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 118.3ms TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-10-16 02:54:57,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 308 states. [2021-10-16 02:54:57,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 308 to 250. [2021-10-16 02:54:57,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 250 states, 197 states have (on average 1.5279187817258884) internal successors, (301), 227 states have internal predecessors, (301), 18 states have call successors, (18), 9 states have call predecessors, (18), 9 states have return successors, (18), 13 states have call predecessors, (18), 18 states have call successors, (18) [2021-10-16 02:54:57,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 337 transitions. [2021-10-16 02:54:57,407 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 337 transitions. Word has length 23 [2021-10-16 02:54:57,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:54:57,408 INFO L470 AbstractCegarLoop]: Abstraction has 250 states and 337 transitions. [2021-10-16 02:54:57,408 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 states have internal predecessors, (23), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-16 02:54:57,408 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 337 transitions. [2021-10-16 02:54:57,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-10-16 02:54:57,409 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:54:57,410 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:54:57,429 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c87352-f820-4e99-96c8-75618c17bcd6/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2021-10-16 02:54:57,624 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c87352-f820-4e99-96c8-75618c17bcd6/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 02:54:57,624 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 41 more)] === [2021-10-16 02:54:57,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:54:57,625 INFO L82 PathProgramCache]: Analyzing trace with hash 387998185, now seen corresponding path program 1 times [2021-10-16 02:54:57,625 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:54:57,625 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2083085327] [2021-10-16 02:54:57,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:54:57,625 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:54:57,626 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c87352-f820-4e99-96c8-75618c17bcd6/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:54:57,626 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c87352-f820-4e99-96c8-75618c17bcd6/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:54:57,627 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c87352-f820-4e99-96c8-75618c17bcd6/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2021-10-16 02:54:57,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:54:57,973 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-16 02:54:57,974 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:54:58,116 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 18 treesize of output 14 [2021-10-16 02:54:58,361 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:54:58,361 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:54:58,607 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 40 treesize of output 34 [2021-10-16 02:54:58,682 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:54:58,682 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:54:58,682 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2083085327] [2021-10-16 02:54:58,683 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2083085327] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:54:58,683 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [88888320] [2021-10-16 02:54:58,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:54:58,683 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-16 02:54:58,683 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c87352-f820-4e99-96c8-75618c17bcd6/bin/utaipan-mTDlp9Zugs/cvc4 [2021-10-16 02:54:58,684 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c87352-f820-4e99-96c8-75618c17bcd6/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-16 02:54:58,685 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c87352-f820-4e99-96c8-75618c17bcd6/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (27)] Waiting until timeout for monitored process [2021-10-16 02:54:59,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:54:59,155 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-16 02:54:59,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:54:59,265 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-16 02:54:59,265 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:54:59,368 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-16 02:54:59,369 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [88888320] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-16 02:54:59,369 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-10-16 02:54:59,369 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [9, 8] total 15 [2021-10-16 02:54:59,369 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1001866265] [2021-10-16 02:54:59,370 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-16 02:54:59,370 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:54:59,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-16 02:54:59,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-10-16 02:54:59,371 INFO L87 Difference]: Start difference. First operand 250 states and 337 transitions. Second operand has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-16 02:54:59,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:54:59,412 INFO L93 Difference]: Finished difference Result 264 states and 356 transitions. [2021-10-16 02:54:59,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-16 02:54:59,412 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 23 [2021-10-16 02:54:59,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:54:59,415 INFO L225 Difference]: With dead ends: 264 [2021-10-16 02:54:59,415 INFO L226 Difference]: Without dead ends: 260 [2021-10-16 02:54:59,416 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 74 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 342.8ms TimeCoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2021-10-16 02:54:59,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2021-10-16 02:54:59,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 254. [2021-10-16 02:54:59,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 254 states, 199 states have (on average 1.5226130653266332) internal successors, (303), 231 states have internal predecessors, (303), 18 states have call successors, (18), 9 states have call predecessors, (18), 11 states have return successors, (22), 13 states have call predecessors, (22), 18 states have call successors, (22) [2021-10-16 02:54:59,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 254 states to 254 states and 343 transitions. [2021-10-16 02:54:59,431 INFO L78 Accepts]: Start accepts. Automaton has 254 states and 343 transitions. Word has length 23 [2021-10-16 02:54:59,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:54:59,431 INFO L470 AbstractCegarLoop]: Abstraction has 254 states and 343 transitions. [2021-10-16 02:54:59,431 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-16 02:54:59,432 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states and 343 transitions. [2021-10-16 02:54:59,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-10-16 02:54:59,432 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:54:59,433 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:54:59,454 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c87352-f820-4e99-96c8-75618c17bcd6/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (26)] Forceful destruction successful, exit code 0 [2021-10-16 02:54:59,650 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c87352-f820-4e99-96c8-75618c17bcd6/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (27)] Forceful destruction successful, exit code 0 [2021-10-16 02:54:59,847 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c87352-f820-4e99-96c8-75618c17bcd6/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c87352-f820-4e99-96c8-75618c17bcd6/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt [2021-10-16 02:54:59,848 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr28REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 41 more)] === [2021-10-16 02:54:59,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:54:59,848 INFO L82 PathProgramCache]: Analyzing trace with hash 746999412, now seen corresponding path program 1 times [2021-10-16 02:54:59,848 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:54:59,848 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2125311248] [2021-10-16 02:54:59,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:54:59,849 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:54:59,849 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c87352-f820-4e99-96c8-75618c17bcd6/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:54:59,850 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c87352-f820-4e99-96c8-75618c17bcd6/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:54:59,855 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c87352-f820-4e99-96c8-75618c17bcd6/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2021-10-16 02:55:00,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:55:00,201 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-16 02:55:00,202 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:55:00,212 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-16 02:55:00,433 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 02:55:00,433 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:55:00,810 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 02:55:00,811 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:55:00,811 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2125311248] [2021-10-16 02:55:00,811 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2125311248] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-16 02:55:00,811 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:55:00,811 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 8 [2021-10-16 02:55:00,811 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1987655079] [2021-10-16 02:55:00,812 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-16 02:55:00,812 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:55:00,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-16 02:55:00,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-10-16 02:55:00,813 INFO L87 Difference]: Start difference. First operand 254 states and 343 transitions. Second operand has 9 states, 8 states have (on average 5.375) internal successors, (43), 9 states have internal predecessors, (43), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-10-16 02:55:01,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:55:01,863 INFO L93 Difference]: Finished difference Result 272 states and 340 transitions. [2021-10-16 02:55:01,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-16 02:55:01,863 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 5.375) internal successors, (43), 9 states have internal predecessors, (43), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 24 [2021-10-16 02:55:01,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:55:01,866 INFO L225 Difference]: With dead ends: 272 [2021-10-16 02:55:01,866 INFO L226 Difference]: Without dead ends: 272 [2021-10-16 02:55:01,867 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 299.3ms TimeCoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2021-10-16 02:55:01,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2021-10-16 02:55:01,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 253. [2021-10-16 02:55:01,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 253 states, 199 states have (on average 1.4773869346733668) internal successors, (294), 230 states have internal predecessors, (294), 18 states have call successors, (18), 9 states have call predecessors, (18), 11 states have return successors, (22), 13 states have call predecessors, (22), 18 states have call successors, (22) [2021-10-16 02:55:01,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 253 states to 253 states and 334 transitions. [2021-10-16 02:55:01,878 INFO L78 Accepts]: Start accepts. Automaton has 253 states and 334 transitions. Word has length 24 [2021-10-16 02:55:01,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:55:01,878 INFO L470 AbstractCegarLoop]: Abstraction has 253 states and 334 transitions. [2021-10-16 02:55:01,879 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 5.375) internal successors, (43), 9 states have internal predecessors, (43), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-10-16 02:55:01,879 INFO L276 IsEmpty]: Start isEmpty. Operand 253 states and 334 transitions. [2021-10-16 02:55:01,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-10-16 02:55:01,880 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:55:01,880 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:55:01,910 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c87352-f820-4e99-96c8-75618c17bcd6/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (28)] Forceful destruction successful, exit code 0 [2021-10-16 02:55:02,110 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c87352-f820-4e99-96c8-75618c17bcd6/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 02:55:02,111 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr27REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 41 more)] === [2021-10-16 02:55:02,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:55:02,111 INFO L82 PathProgramCache]: Analyzing trace with hash 746999411, now seen corresponding path program 1 times [2021-10-16 02:55:02,112 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:55:02,112 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [379866270] [2021-10-16 02:55:02,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:55:02,113 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:55:02,113 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c87352-f820-4e99-96c8-75618c17bcd6/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:55:02,114 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c87352-f820-4e99-96c8-75618c17bcd6/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:55:02,122 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c87352-f820-4e99-96c8-75618c17bcd6/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2021-10-16 02:55:02,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:55:02,652 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-16 02:55:02,654 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:55:02,660 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-16 02:55:02,836 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 02:55:02,837 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:55:02,957 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 02:55:02,958 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:55:02,958 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [379866270] [2021-10-16 02:55:02,958 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [379866270] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-16 02:55:02,958 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:55:02,958 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 5 [2021-10-16 02:55:02,958 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [381826518] [2021-10-16 02:55:02,959 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-16 02:55:02,959 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:55:02,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-16 02:55:02,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-10-16 02:55:02,960 INFO L87 Difference]: Start difference. First operand 253 states and 334 transitions. Second operand has 6 states, 5 states have (on average 5.0) internal successors, (25), 6 states have internal predecessors, (25), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-10-16 02:55:03,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:55:03,505 INFO L93 Difference]: Finished difference Result 263 states and 326 transitions. [2021-10-16 02:55:03,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-16 02:55:03,507 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.0) internal successors, (25), 6 states have internal predecessors, (25), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 24 [2021-10-16 02:55:03,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:55:03,509 INFO L225 Difference]: With dead ends: 263 [2021-10-16 02:55:03,510 INFO L226 Difference]: Without dead ends: 263 [2021-10-16 02:55:03,510 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 36 SyntacticMatches, 6 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 87.9ms TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-10-16 02:55:03,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2021-10-16 02:55:03,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 250. [2021-10-16 02:55:03,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 250 states, 199 states have (on average 1.4120603015075377) internal successors, (281), 227 states have internal predecessors, (281), 18 states have call successors, (18), 9 states have call predecessors, (18), 11 states have return successors, (22), 13 states have call predecessors, (22), 18 states have call successors, (22) [2021-10-16 02:55:03,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 321 transitions. [2021-10-16 02:55:03,521 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 321 transitions. Word has length 24 [2021-10-16 02:55:03,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:55:03,522 INFO L470 AbstractCegarLoop]: Abstraction has 250 states and 321 transitions. [2021-10-16 02:55:03,522 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 5.0) internal successors, (25), 6 states have internal predecessors, (25), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-10-16 02:55:03,522 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 321 transitions. [2021-10-16 02:55:03,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-10-16 02:55:03,523 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:55:03,523 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:55:03,551 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c87352-f820-4e99-96c8-75618c17bcd6/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (29)] Forceful destruction successful, exit code 0 [2021-10-16 02:55:03,738 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c87352-f820-4e99-96c8-75618c17bcd6/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 02:55:03,738 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr16REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 41 more)] === [2021-10-16 02:55:03,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:55:03,739 INFO L82 PathProgramCache]: Analyzing trace with hash 1457055843, now seen corresponding path program 1 times [2021-10-16 02:55:03,739 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:55:03,739 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1037548266] [2021-10-16 02:55:03,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:55:03,740 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:55:03,740 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c87352-f820-4e99-96c8-75618c17bcd6/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:55:03,741 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c87352-f820-4e99-96c8-75618c17bcd6/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:55:03,742 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c87352-f820-4e99-96c8-75618c17bcd6/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2021-10-16 02:55:04,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:55:04,315 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 12 conjunts are in the unsatisfiable core [2021-10-16 02:55:04,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:55:04,355 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-16 02:55:04,452 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 23 treesize of output 19 [2021-10-16 02:55:04,640 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 27 treesize of output 15 [2021-10-16 02:55:04,665 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:55:04,665 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:55:04,797 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 60 treesize of output 54 [2021-10-16 02:55:05,045 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:55:05,046 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:55:05,046 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1037548266] [2021-10-16 02:55:05,046 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1037548266] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:55:05,046 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [385217482] [2021-10-16 02:55:05,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:55:05,046 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-16 02:55:05,047 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c87352-f820-4e99-96c8-75618c17bcd6/bin/utaipan-mTDlp9Zugs/cvc4 [2021-10-16 02:55:05,050 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c87352-f820-4e99-96c8-75618c17bcd6/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-16 02:55:05,077 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c87352-f820-4e99-96c8-75618c17bcd6/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (31)] Waiting until timeout for monitored process [2021-10-16 02:55:05,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:55:05,730 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 14 conjunts are in the unsatisfiable core [2021-10-16 02:55:05,731 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:55:05,890 INFO L354 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2021-10-16 02:55:05,891 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 17 treesize of output 22 [2021-10-16 02:55:06,027 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 23 treesize of output 19 [2021-10-16 02:55:06,430 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 36 treesize of output 28 [2021-10-16 02:55:06,465 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:55:06,465 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:55:06,577 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 60 treesize of output 54 [2021-10-16 02:55:06,821 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:55:06,821 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [385217482] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:55:06,821 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1887642837] [2021-10-16 02:55:06,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:55:06,821 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 02:55:06,822 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c87352-f820-4e99-96c8-75618c17bcd6/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 02:55:06,829 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c87352-f820-4e99-96c8-75618c17bcd6/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-16 02:55:06,845 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c87352-f820-4e99-96c8-75618c17bcd6/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2021-10-16 02:55:07,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:55:07,576 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 13 conjunts are in the unsatisfiable core [2021-10-16 02:55:07,576 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:55:07,747 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 23 treesize of output 19 [2021-10-16 02:55:08,039 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 25 treesize of output 17 [2021-10-16 02:55:08,062 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:55:08,063 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:55:08,165 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 60 treesize of output 54 [2021-10-16 02:55:08,285 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-10-16 02:55:08,286 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 45 [2021-10-16 02:55:08,347 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:55:08,347 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1887642837] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:55:08,347 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-16 02:55:08,347 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 9, 6, 8, 6] total 21 [2021-10-16 02:55:08,348 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1980132811] [2021-10-16 02:55:08,348 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-10-16 02:55:08,348 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:55:08,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-10-16 02:55:08,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=377, Unknown=0, NotChecked=0, Total=462 [2021-10-16 02:55:08,349 INFO L87 Difference]: Start difference. First operand 250 states and 321 transitions. Second operand has 22 states, 21 states have (on average 3.5714285714285716) internal successors, (75), 22 states have internal predecessors, (75), 3 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-10-16 02:55:33,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:55:33,413 INFO L93 Difference]: Finished difference Result 394 states and 473 transitions. [2021-10-16 02:55:33,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-10-16 02:55:33,414 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 3.5714285714285716) internal successors, (75), 22 states have internal predecessors, (75), 3 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 25 [2021-10-16 02:55:33,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:55:33,417 INFO L225 Difference]: With dead ends: 394 [2021-10-16 02:55:33,417 INFO L226 Difference]: Without dead ends: 394 [2021-10-16 02:55:33,418 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 109 SyntacticMatches, 15 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 325 ImplicationChecksByTransitivity, 1338.5ms TimeCoverageRelationStatistics Valid=209, Invalid=661, Unknown=0, NotChecked=0, Total=870 [2021-10-16 02:55:33,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 394 states. [2021-10-16 02:55:33,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 394 to 250. [2021-10-16 02:55:33,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 250 states, 199 states have (on average 1.407035175879397) internal successors, (280), 227 states have internal predecessors, (280), 18 states have call successors, (18), 9 states have call predecessors, (18), 11 states have return successors, (22), 13 states have call predecessors, (22), 18 states have call successors, (22) [2021-10-16 02:55:33,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 320 transitions. [2021-10-16 02:55:33,430 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 320 transitions. Word has length 25 [2021-10-16 02:55:33,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:55:33,430 INFO L470 AbstractCegarLoop]: Abstraction has 250 states and 320 transitions. [2021-10-16 02:55:33,431 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 3.5714285714285716) internal successors, (75), 22 states have internal predecessors, (75), 3 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-10-16 02:55:33,431 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 320 transitions. [2021-10-16 02:55:33,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-10-16 02:55:33,432 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:55:33,432 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:55:33,475 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c87352-f820-4e99-96c8-75618c17bcd6/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2021-10-16 02:55:33,661 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c87352-f820-4e99-96c8-75618c17bcd6/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (31)] Forceful destruction successful, exit code 0 [2021-10-16 02:55:33,868 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c87352-f820-4e99-96c8-75618c17bcd6/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (30)] Forceful destruction successful, exit code 0 [2021-10-16 02:55:34,059 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c87352-f820-4e99-96c8-75618c17bcd6/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c87352-f820-4e99-96c8-75618c17bcd6/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c87352-f820-4e99-96c8-75618c17bcd6/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 02:55:34,060 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr17REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 41 more)] === [2021-10-16 02:55:34,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:55:34,060 INFO L82 PathProgramCache]: Analyzing trace with hash 1457055844, now seen corresponding path program 1 times [2021-10-16 02:55:34,060 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:55:34,060 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1611385997] [2021-10-16 02:55:34,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:55:34,061 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:55:34,061 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c87352-f820-4e99-96c8-75618c17bcd6/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:55:34,061 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c87352-f820-4e99-96c8-75618c17bcd6/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:55:34,063 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c87352-f820-4e99-96c8-75618c17bcd6/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (33)] Waiting until timeout for monitored process [2021-10-16 02:55:34,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:55:34,521 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 15 conjunts are in the unsatisfiable core [2021-10-16 02:55:34,522 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:55:34,563 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-16 02:55:34,667 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 19 treesize of output 15 [2021-10-16 02:55:34,678 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 02:55:34,986 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 39 treesize of output 27 [2021-10-16 02:55:34,992 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 24 treesize of output 12 [2021-10-16 02:55:35,036 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:55:35,036 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:55:35,502 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 78 treesize of output 72 [2021-10-16 02:55:35,506 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 118 treesize of output 106 [2021-10-16 02:55:35,899 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 48 treesize of output 36 [2021-10-16 02:55:36,154 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:55:36,155 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:55:36,155 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1611385997] [2021-10-16 02:55:36,155 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1611385997] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:55:36,155 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1202263618] [2021-10-16 02:55:36,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:55:36,156 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-16 02:55:36,156 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c87352-f820-4e99-96c8-75618c17bcd6/bin/utaipan-mTDlp9Zugs/cvc4 [2021-10-16 02:55:36,156 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c87352-f820-4e99-96c8-75618c17bcd6/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-16 02:55:36,158 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c87352-f820-4e99-96c8-75618c17bcd6/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (34)] Waiting until timeout for monitored process [2021-10-16 02:55:36,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:55:36,837 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 16 conjunts are in the unsatisfiable core [2021-10-16 02:55:36,838 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:55:36,934 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-16 02:55:37,071 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 02:55:37,084 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 19 treesize of output 15 [2021-10-16 02:55:37,508 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 31 treesize of output 23 [2021-10-16 02:55:37,511 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 20 treesize of output 12 [2021-10-16 02:55:37,525 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:55:37,525 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:55:37,715 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 78 treesize of output 72 [2021-10-16 02:55:37,719 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 118 treesize of output 106 [2021-10-16 02:55:37,984 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 48 treesize of output 36 [2021-10-16 02:55:38,119 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:55:38,119 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1202263618] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:55:38,119 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1578216217] [2021-10-16 02:55:38,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:55:38,119 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 02:55:38,120 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c87352-f820-4e99-96c8-75618c17bcd6/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 02:55:38,120 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c87352-f820-4e99-96c8-75618c17bcd6/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-16 02:55:38,121 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c87352-f820-4e99-96c8-75618c17bcd6/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2021-10-16 02:55:38,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:55:38,697 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 16 conjunts are in the unsatisfiable core [2021-10-16 02:55:38,697 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:55:38,759 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-16 02:55:38,868 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 02:55:38,875 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 19 treesize of output 15 [2021-10-16 02:55:39,197 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 31 treesize of output 23 [2021-10-16 02:55:39,202 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 20 treesize of output 12 [2021-10-16 02:55:39,221 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:55:39,222 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:55:39,430 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 78 treesize of output 72 [2021-10-16 02:55:39,440 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 118 treesize of output 106 [2021-10-16 02:55:39,819 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 48 treesize of output 36 [2021-10-16 02:55:39,975 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:55:39,975 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1578216217] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:55:39,975 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-16 02:55:39,975 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 8, 6, 8, 6] total 17 [2021-10-16 02:55:39,975 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [365230354] [2021-10-16 02:55:39,976 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-10-16 02:55:39,976 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:55:39,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-10-16 02:55:39,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2021-10-16 02:55:39,977 INFO L87 Difference]: Start difference. First operand 250 states and 320 transitions. Second operand has 18 states, 17 states have (on average 3.588235294117647) internal successors, (61), 18 states have internal predecessors, (61), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-10-16 02:55:52,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:55:52,618 INFO L93 Difference]: Finished difference Result 408 states and 486 transitions. [2021-10-16 02:55:52,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-10-16 02:55:52,619 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 3.588235294117647) internal successors, (61), 18 states have internal predecessors, (61), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 25 [2021-10-16 02:55:52,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:55:52,637 INFO L225 Difference]: With dead ends: 408 [2021-10-16 02:55:52,637 INFO L226 Difference]: Without dead ends: 408 [2021-10-16 02:55:52,638 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 124 SyntacticMatches, 4 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 1364.4ms TimeCoverageRelationStatistics Valid=169, Invalid=533, Unknown=0, NotChecked=0, Total=702 [2021-10-16 02:55:52,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 408 states. [2021-10-16 02:55:52,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 408 to 250. [2021-10-16 02:55:52,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 250 states, 199 states have (on average 1.4020100502512562) internal successors, (279), 227 states have internal predecessors, (279), 18 states have call successors, (18), 9 states have call predecessors, (18), 11 states have return successors, (22), 13 states have call predecessors, (22), 18 states have call successors, (22) [2021-10-16 02:55:52,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 319 transitions. [2021-10-16 02:55:52,650 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 319 transitions. Word has length 25 [2021-10-16 02:55:52,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:55:52,650 INFO L470 AbstractCegarLoop]: Abstraction has 250 states and 319 transitions. [2021-10-16 02:55:52,650 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 3.588235294117647) internal successors, (61), 18 states have internal predecessors, (61), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-10-16 02:55:52,651 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 319 transitions. [2021-10-16 02:55:52,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-10-16 02:55:52,651 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:55:52,652 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:55:52,671 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c87352-f820-4e99-96c8-75618c17bcd6/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (33)] Forceful destruction successful, exit code 0 [2021-10-16 02:55:52,909 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c87352-f820-4e99-96c8-75618c17bcd6/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2021-10-16 02:55:53,069 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c87352-f820-4e99-96c8-75618c17bcd6/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (34)] Forceful destruction successful, exit code 0 [2021-10-16 02:55:53,267 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c87352-f820-4e99-96c8-75618c17bcd6/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3,35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c87352-f820-4e99-96c8-75618c17bcd6/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true,34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c87352-f820-4e99-96c8-75618c17bcd6/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt [2021-10-16 02:55:53,267 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr31REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 41 more)] === [2021-10-16 02:55:53,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:55:53,267 INFO L82 PathProgramCache]: Analyzing trace with hash 1633976965, now seen corresponding path program 1 times [2021-10-16 02:55:53,268 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:55:53,268 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [767706519] [2021-10-16 02:55:53,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:55:53,268 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:55:53,268 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c87352-f820-4e99-96c8-75618c17bcd6/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:55:53,269 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c87352-f820-4e99-96c8-75618c17bcd6/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:55:53,270 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c87352-f820-4e99-96c8-75618c17bcd6/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (36)] Waiting until timeout for monitored process [2021-10-16 02:55:53,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:55:53,790 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 15 conjunts are in the unsatisfiable core [2021-10-16 02:55:53,792 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:55:53,817 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 02:55:53,826 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 02:55:54,142 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 37 treesize of output 25 [2021-10-16 02:55:54,145 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 22 treesize of output 10 [2021-10-16 02:55:54,172 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 02:55:54,172 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:55:54,399 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 02:55:54,399 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:55:54,399 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [767706519] [2021-10-16 02:55:54,399 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [767706519] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-16 02:55:54,400 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:55:54,400 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 6] imperfect sequences [] total 7 [2021-10-16 02:55:54,400 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1254351573] [2021-10-16 02:55:54,400 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-16 02:55:54,401 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:55:54,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-16 02:55:54,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-10-16 02:55:54,402 INFO L87 Difference]: Start difference. First operand 250 states and 319 transitions. Second operand has 7 states, 7 states have (on average 4.0) internal successors, (28), 7 states have internal predecessors, (28), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-10-16 02:56:09,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:56:09,346 INFO L93 Difference]: Finished difference Result 262 states and 329 transitions. [2021-10-16 02:56:09,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-16 02:56:09,346 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.0) internal successors, (28), 7 states have internal predecessors, (28), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 27 [2021-10-16 02:56:09,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:56:09,348 INFO L225 Difference]: With dead ends: 262 [2021-10-16 02:56:09,348 INFO L226 Difference]: Without dead ends: 262 [2021-10-16 02:56:09,348 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 233.9ms TimeCoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2021-10-16 02:56:09,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2021-10-16 02:56:09,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 250. [2021-10-16 02:56:09,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 250 states, 199 states have (on average 1.3969849246231156) internal successors, (278), 227 states have internal predecessors, (278), 18 states have call successors, (18), 9 states have call predecessors, (18), 11 states have return successors, (22), 13 states have call predecessors, (22), 18 states have call successors, (22) [2021-10-16 02:56:09,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 318 transitions. [2021-10-16 02:56:09,358 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 318 transitions. Word has length 27 [2021-10-16 02:56:09,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:56:09,358 INFO L470 AbstractCegarLoop]: Abstraction has 250 states and 318 transitions. [2021-10-16 02:56:09,359 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.0) internal successors, (28), 7 states have internal predecessors, (28), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-10-16 02:56:09,359 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 318 transitions. [2021-10-16 02:56:09,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-10-16 02:56:09,359 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:56:09,360 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:56:09,377 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c87352-f820-4e99-96c8-75618c17bcd6/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (36)] Forceful destruction successful, exit code 0 [2021-10-16 02:56:09,577 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c87352-f820-4e99-96c8-75618c17bcd6/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 02:56:09,577 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting is_list_containing_xErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 41 more)] === [2021-10-16 02:56:09,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:56:09,577 INFO L82 PathProgramCache]: Analyzing trace with hash 923786604, now seen corresponding path program 1 times [2021-10-16 02:56:09,578 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:56:09,578 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1240487667] [2021-10-16 02:56:09,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:56:09,578 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:56:09,578 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c87352-f820-4e99-96c8-75618c17bcd6/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:56:09,579 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c87352-f820-4e99-96c8-75618c17bcd6/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:56:09,620 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c87352-f820-4e99-96c8-75618c17bcd6/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (37)] Waiting until timeout for monitored process [2021-10-16 02:56:10,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:56:10,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 17 conjunts are in the unsatisfiable core [2021-10-16 02:56:10,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:56:10,453 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-16 02:56:10,545 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 19 treesize of output 15 [2021-10-16 02:56:10,553 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 02:56:10,718 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 39 treesize of output 27 [2021-10-16 02:56:10,721 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 24 treesize of output 12 [2021-10-16 02:56:10,836 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-16 02:56:10,836 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:56:11,533 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 52 treesize of output 40 [2021-10-16 02:56:11,556 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 02:56:11,557 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 02:56:11,562 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 02:56:11,563 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 02:56:11,879 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-16 02:56:11,880 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:56:11,880 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1240487667] [2021-10-16 02:56:11,880 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1240487667] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:56:11,880 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [194634548] [2021-10-16 02:56:11,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:56:11,880 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-16 02:56:11,881 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c87352-f820-4e99-96c8-75618c17bcd6/bin/utaipan-mTDlp9Zugs/cvc4 [2021-10-16 02:56:11,882 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c87352-f820-4e99-96c8-75618c17bcd6/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-16 02:56:11,890 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c87352-f820-4e99-96c8-75618c17bcd6/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (38)] Waiting until timeout for monitored process [2021-10-16 02:56:12,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:56:12,703 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 18 conjunts are in the unsatisfiable core [2021-10-16 02:56:12,704 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:56:12,945 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-16 02:56:13,090 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 19 treesize of output 15 [2021-10-16 02:56:13,097 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 02:56:13,419 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 31 treesize of output 23 [2021-10-16 02:56:13,423 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 20 treesize of output 12 [2021-10-16 02:56:13,469 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-16 02:56:13,470 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:56:13,713 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 52 treesize of output 40 [2021-10-16 02:56:13,742 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 02:56:13,744 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 02:56:13,748 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 02:56:13,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 02:56:13,912 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-16 02:56:13,913 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [194634548] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:56:13,913 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [843217041] [2021-10-16 02:56:13,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:56:13,913 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 02:56:13,914 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c87352-f820-4e99-96c8-75618c17bcd6/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 02:56:13,926 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c87352-f820-4e99-96c8-75618c17bcd6/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-16 02:56:13,958 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c87352-f820-4e99-96c8-75618c17bcd6/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2021-10-16 02:56:14,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:56:14,677 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 18 conjunts are in the unsatisfiable core [2021-10-16 02:56:14,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:56:14,784 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-16 02:56:14,869 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 02:56:14,875 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 19 treesize of output 15 [2021-10-16 02:56:15,035 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 31 treesize of output 23 [2021-10-16 02:56:15,037 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 20 treesize of output 12 [2021-10-16 02:56:15,068 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-16 02:56:15,069 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:56:15,245 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 52 treesize of output 40 [2021-10-16 02:56:15,275 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 02:56:15,276 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 02:56:15,280 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 02:56:15,282 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 02:56:15,458 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-16 02:56:15,458 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [843217041] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:56:15,458 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-16 02:56:15,458 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 10, 9, 10, 9] total 22 [2021-10-16 02:56:15,459 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [529849586] [2021-10-16 02:56:15,459 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-10-16 02:56:15,460 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:56:15,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-10-16 02:56:15,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=440, Unknown=0, NotChecked=0, Total=506 [2021-10-16 02:56:15,461 INFO L87 Difference]: Start difference. First operand 250 states and 318 transitions. Second operand has 23 states, 20 states have (on average 3.15) internal successors, (63), 18 states have internal predecessors, (63), 5 states have call successors, (5), 5 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:56:18,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:56:18,482 INFO L93 Difference]: Finished difference Result 316 states and 390 transitions. [2021-10-16 02:56:18,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-10-16 02:56:18,483 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 20 states have (on average 3.15) internal successors, (63), 18 states have internal predecessors, (63), 5 states have call successors, (5), 5 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-10-16 02:56:18,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:56:18,485 INFO L225 Difference]: With dead ends: 316 [2021-10-16 02:56:18,485 INFO L226 Difference]: Without dead ends: 316 [2021-10-16 02:56:18,486 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 140 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 1561.3ms TimeCoverageRelationStatistics Valid=114, Invalid=642, Unknown=0, NotChecked=0, Total=756 [2021-10-16 02:56:18,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 316 states. [2021-10-16 02:56:18,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 316 to 250. [2021-10-16 02:56:18,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 250 states, 199 states have (on average 1.3919597989949748) internal successors, (277), 227 states have internal predecessors, (277), 18 states have call successors, (18), 9 states have call predecessors, (18), 11 states have return successors, (22), 13 states have call predecessors, (22), 18 states have call successors, (22) [2021-10-16 02:56:18,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 317 transitions. [2021-10-16 02:56:18,495 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 317 transitions. Word has length 28 [2021-10-16 02:56:18,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:56:18,495 INFO L470 AbstractCegarLoop]: Abstraction has 250 states and 317 transitions. [2021-10-16 02:56:18,495 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 20 states have (on average 3.15) internal successors, (63), 18 states have internal predecessors, (63), 5 states have call successors, (5), 5 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:56:18,495 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 317 transitions. [2021-10-16 02:56:18,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-10-16 02:56:18,496 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:56:18,496 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:56:18,538 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c87352-f820-4e99-96c8-75618c17bcd6/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2021-10-16 02:56:18,718 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c87352-f820-4e99-96c8-75618c17bcd6/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (37)] Ended with exit code 0 [2021-10-16 02:56:18,912 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c87352-f820-4e99-96c8-75618c17bcd6/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (38)] Ended with exit code 0 [2021-10-16 02:56:19,110 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c87352-f820-4e99-96c8-75618c17bcd6/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true,37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c87352-f820-4e99-96c8-75618c17bcd6/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3,38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c87352-f820-4e99-96c8-75618c17bcd6/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt [2021-10-16 02:56:19,110 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr24REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 41 more)] === [2021-10-16 02:56:19,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:56:19,110 INFO L82 PathProgramCache]: Analyzing trace with hash 427343141, now seen corresponding path program 1 times [2021-10-16 02:56:19,111 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:56:19,111 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [563272970] [2021-10-16 02:56:19,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:56:19,111 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:56:19,111 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c87352-f820-4e99-96c8-75618c17bcd6/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:56:19,112 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c87352-f820-4e99-96c8-75618c17bcd6/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:56:19,114 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c87352-f820-4e99-96c8-75618c17bcd6/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (40)] Waiting until timeout for monitored process [2021-10-16 02:56:19,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:56:19,760 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 12 conjunts are in the unsatisfiable core [2021-10-16 02:56:19,761 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:56:19,853 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 18 treesize of output 14 [2021-10-16 02:56:19,981 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 20 treesize of output 8 [2021-10-16 02:56:20,007 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:56:20,008 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:56:20,098 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 40 treesize of output 34 [2021-10-16 02:56:20,176 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:56:20,176 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:56:20,176 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [563272970] [2021-10-16 02:56:20,176 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [563272970] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:56:20,176 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1427888901] [2021-10-16 02:56:20,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:56:20,176 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-16 02:56:20,177 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c87352-f820-4e99-96c8-75618c17bcd6/bin/utaipan-mTDlp9Zugs/cvc4 [2021-10-16 02:56:20,177 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c87352-f820-4e99-96c8-75618c17bcd6/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-16 02:56:20,179 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c87352-f820-4e99-96c8-75618c17bcd6/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (41)] Waiting until timeout for monitored process [2021-10-16 02:56:21,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:56:21,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 13 conjunts are in the unsatisfiable core [2021-10-16 02:56:21,112 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:56:21,282 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 18 treesize of output 14 [2021-10-16 02:56:21,512 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 16 treesize of output 8 [2021-10-16 02:56:21,531 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:56:21,531 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:56:21,678 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 40 treesize of output 34 [2021-10-16 02:56:21,761 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:56:21,761 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1427888901] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:56:21,761 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [212012809] [2021-10-16 02:56:21,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:56:21,762 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 02:56:21,762 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c87352-f820-4e99-96c8-75618c17bcd6/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 02:56:21,763 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c87352-f820-4e99-96c8-75618c17bcd6/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-16 02:56:21,770 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c87352-f820-4e99-96c8-75618c17bcd6/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2021-10-16 02:56:22,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:56:22,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 13 conjunts are in the unsatisfiable core [2021-10-16 02:56:22,585 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:56:22,699 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 18 treesize of output 14 [2021-10-16 02:56:22,852 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 16 treesize of output 8 [2021-10-16 02:56:22,867 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:56:22,867 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:56:22,933 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 40 treesize of output 34 [2021-10-16 02:56:23,005 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:56:23,005 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [212012809] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:56:23,005 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-16 02:56:23,005 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 9, 7, 9, 7] total 14 [2021-10-16 02:56:23,005 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2001510323] [2021-10-16 02:56:23,006 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-10-16 02:56:23,006 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:56:23,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-10-16 02:56:23,007 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2021-10-16 02:56:23,008 INFO L87 Difference]: Start difference. First operand 250 states and 317 transitions. Second operand has 14 states, 14 states have (on average 3.2857142857142856) internal successors, (46), 14 states have internal predecessors, (46), 2 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-10-16 02:56:55,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:56:55,939 INFO L93 Difference]: Finished difference Result 342 states and 405 transitions. [2021-10-16 02:56:55,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-10-16 02:56:55,940 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.2857142857142856) internal successors, (46), 14 states have internal predecessors, (46), 2 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 27 [2021-10-16 02:56:55,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:56:55,942 INFO L225 Difference]: With dead ends: 342 [2021-10-16 02:56:55,943 INFO L226 Difference]: Without dead ends: 342 [2021-10-16 02:56:55,943 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 140 SyntacticMatches, 4 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 460.1ms TimeCoverageRelationStatistics Valid=107, Invalid=273, Unknown=0, NotChecked=0, Total=380 [2021-10-16 02:56:55,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 342 states. [2021-10-16 02:56:55,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 342 to 237. [2021-10-16 02:56:55,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 237 states, 187 states have (on average 1.3850267379679144) internal successors, (259), 214 states have internal predecessors, (259), 17 states have call successors, (17), 9 states have call predecessors, (17), 11 states have return successors, (21), 13 states have call predecessors, (21), 17 states have call successors, (21) [2021-10-16 02:56:55,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 237 states to 237 states and 297 transitions. [2021-10-16 02:56:55,953 INFO L78 Accepts]: Start accepts. Automaton has 237 states and 297 transitions. Word has length 27 [2021-10-16 02:56:55,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:56:55,953 INFO L470 AbstractCegarLoop]: Abstraction has 237 states and 297 transitions. [2021-10-16 02:56:55,954 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.2857142857142856) internal successors, (46), 14 states have internal predecessors, (46), 2 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-10-16 02:56:55,954 INFO L276 IsEmpty]: Start isEmpty. Operand 237 states and 297 transitions. [2021-10-16 02:56:55,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-10-16 02:56:55,955 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:56:55,955 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:56:55,974 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c87352-f820-4e99-96c8-75618c17bcd6/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (41)] Forceful destruction successful, exit code 0 [2021-10-16 02:56:56,183 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c87352-f820-4e99-96c8-75618c17bcd6/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2021-10-16 02:56:56,369 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c87352-f820-4e99-96c8-75618c17bcd6/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (40)] Forceful destruction successful, exit code 0 [2021-10-16 02:56:56,560 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c87352-f820-4e99-96c8-75618c17bcd6/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt,42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c87352-f820-4e99-96c8-75618c17bcd6/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true,40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c87352-f820-4e99-96c8-75618c17bcd6/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 02:56:56,560 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr37REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 41 more)] === [2021-10-16 02:56:56,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:56:56,560 INFO L82 PathProgramCache]: Analyzing trace with hash -1697542573, now seen corresponding path program 1 times [2021-10-16 02:56:56,561 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:56:56,561 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [430141371] [2021-10-16 02:56:56,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:56:56,561 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:56:56,561 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c87352-f820-4e99-96c8-75618c17bcd6/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:56:56,562 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c87352-f820-4e99-96c8-75618c17bcd6/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:56:56,563 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c87352-f820-4e99-96c8-75618c17bcd6/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (43)] Waiting until timeout for monitored process [2021-10-16 02:56:57,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:56:57,257 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 15 conjunts are in the unsatisfiable core [2021-10-16 02:56:57,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:56:57,458 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 29 treesize of output 21 [2021-10-16 02:56:57,461 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 18 treesize of output 10 [2021-10-16 02:56:57,488 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 02:56:57,489 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:56:57,654 INFO L354 Elim1Store]: treesize reduction 4, result has 63.6 percent of original size [2021-10-16 02:56:57,655 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 32 treesize of output 31 [2021-10-16 02:56:57,662 INFO L354 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2021-10-16 02:56:57,662 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 19 [2021-10-16 02:56:57,713 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 02:56:57,713 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:56:57,713 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [430141371] [2021-10-16 02:56:57,713 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [430141371] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-16 02:56:57,714 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:56:57,714 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 8 [2021-10-16 02:56:57,714 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1072245926] [2021-10-16 02:56:57,714 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-16 02:56:57,714 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:56:57,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-16 02:56:57,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-10-16 02:56:57,715 INFO L87 Difference]: Start difference. First operand 237 states and 297 transitions. Second operand has 8 states, 8 states have (on average 3.625) internal successors, (29), 8 states have internal predecessors, (29), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-16 02:56:58,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:56:58,249 INFO L93 Difference]: Finished difference Result 279 states and 343 transitions. [2021-10-16 02:56:58,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-16 02:56:58,250 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.625) internal successors, (29), 8 states have internal predecessors, (29), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 29 [2021-10-16 02:56:58,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:56:58,252 INFO L225 Difference]: With dead ends: 279 [2021-10-16 02:56:58,252 INFO L226 Difference]: Without dead ends: 279 [2021-10-16 02:56:58,252 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 198.7ms TimeCoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2021-10-16 02:56:58,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 279 states. [2021-10-16 02:56:58,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 279 to 259. [2021-10-16 02:56:58,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 259 states, 208 states have (on average 1.3653846153846154) internal successors, (284), 235 states have internal predecessors, (284), 18 states have call successors, (18), 9 states have call predecessors, (18), 11 states have return successors, (22), 14 states have call predecessors, (22), 18 states have call successors, (22) [2021-10-16 02:56:58,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 324 transitions. [2021-10-16 02:56:58,263 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 324 transitions. Word has length 29 [2021-10-16 02:56:58,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:56:58,263 INFO L470 AbstractCegarLoop]: Abstraction has 259 states and 324 transitions. [2021-10-16 02:56:58,263 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.625) internal successors, (29), 8 states have internal predecessors, (29), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-16 02:56:58,264 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 324 transitions. [2021-10-16 02:56:58,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-10-16 02:56:58,264 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:56:58,265 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:56:58,297 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c87352-f820-4e99-96c8-75618c17bcd6/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (43)] Ended with exit code 0 [2021-10-16 02:56:58,498 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c87352-f820-4e99-96c8-75618c17bcd6/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 02:56:58,499 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 41 more)] === [2021-10-16 02:56:58,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:56:58,499 INFO L82 PathProgramCache]: Analyzing trace with hash -1143560603, now seen corresponding path program 1 times [2021-10-16 02:56:58,499 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:56:58,499 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1767892878] [2021-10-16 02:56:58,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:56:58,499 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:56:58,500 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c87352-f820-4e99-96c8-75618c17bcd6/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:56:58,500 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c87352-f820-4e99-96c8-75618c17bcd6/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:56:58,503 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c87352-f820-4e99-96c8-75618c17bcd6/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (44)] Waiting until timeout for monitored process [2021-10-16 02:56:59,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:56:59,254 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-16 02:56:59,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:56:59,267 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-16 02:56:59,393 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-10-16 02:56:59,394 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:56:59,470 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-10-16 02:56:59,470 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:56:59,471 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1767892878] [2021-10-16 02:56:59,471 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1767892878] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-16 02:56:59,471 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:56:59,471 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 5 [2021-10-16 02:56:59,471 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1545072069] [2021-10-16 02:56:59,471 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-16 02:56:59,472 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:56:59,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-16 02:56:59,472 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-10-16 02:56:59,472 INFO L87 Difference]: Start difference. First operand 259 states and 324 transitions. Second operand has 6 states, 5 states have (on average 6.4) internal successors, (32), 6 states have internal predecessors, (32), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-10-16 02:57:00,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:57:00,036 INFO L93 Difference]: Finished difference Result 274 states and 332 transitions. [2021-10-16 02:57:00,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-16 02:57:00,037 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 6 states have internal predecessors, (32), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 30 [2021-10-16 02:57:00,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:57:00,038 INFO L225 Difference]: With dead ends: 274 [2021-10-16 02:57:00,038 INFO L226 Difference]: Without dead ends: 274 [2021-10-16 02:57:00,039 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 51 SyntacticMatches, 3 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 62.7ms TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-10-16 02:57:00,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274 states. [2021-10-16 02:57:00,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274 to 258. [2021-10-16 02:57:00,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 258 states, 208 states have (on average 1.3557692307692308) internal successors, (282), 234 states have internal predecessors, (282), 18 states have call successors, (18), 9 states have call predecessors, (18), 11 states have return successors, (22), 14 states have call predecessors, (22), 18 states have call successors, (22) [2021-10-16 02:57:00,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 258 states to 258 states and 322 transitions. [2021-10-16 02:57:00,047 INFO L78 Accepts]: Start accepts. Automaton has 258 states and 322 transitions. Word has length 30 [2021-10-16 02:57:00,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:57:00,048 INFO L470 AbstractCegarLoop]: Abstraction has 258 states and 322 transitions. [2021-10-16 02:57:00,048 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 6 states have internal predecessors, (32), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-10-16 02:57:00,048 INFO L276 IsEmpty]: Start isEmpty. Operand 258 states and 322 transitions. [2021-10-16 02:57:00,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-10-16 02:57:00,049 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:57:00,049 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:57:00,075 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c87352-f820-4e99-96c8-75618c17bcd6/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (44)] Ended with exit code 0 [2021-10-16 02:57:00,274 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c87352-f820-4e99-96c8-75618c17bcd6/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 02:57:00,275 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 41 more)] === [2021-10-16 02:57:00,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:57:00,275 INFO L82 PathProgramCache]: Analyzing trace with hash -1143560602, now seen corresponding path program 1 times [2021-10-16 02:57:00,275 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:57:00,276 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [284177015] [2021-10-16 02:57:00,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:57:00,276 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:57:00,276 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c87352-f820-4e99-96c8-75618c17bcd6/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:57:00,277 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c87352-f820-4e99-96c8-75618c17bcd6/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:57:00,278 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c87352-f820-4e99-96c8-75618c17bcd6/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (45)] Waiting until timeout for monitored process [2021-10-16 02:57:01,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:57:01,113 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-16 02:57:01,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:57:01,131 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-16 02:57:01,376 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-10-16 02:57:01,376 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:57:01,691 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-10-16 02:57:01,692 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:57:01,692 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [284177015] [2021-10-16 02:57:01,692 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [284177015] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-16 02:57:01,692 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:57:01,692 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 8 [2021-10-16 02:57:01,692 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1540647490] [2021-10-16 02:57:01,692 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-16 02:57:01,693 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:57:01,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-16 02:57:01,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-10-16 02:57:01,693 INFO L87 Difference]: Start difference. First operand 258 states and 322 transitions. Second operand has 9 states, 8 states have (on average 5.375) internal successors, (43), 9 states have internal predecessors, (43), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-10-16 02:57:03,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:57:03,071 INFO L93 Difference]: Finished difference Result 274 states and 327 transitions. [2021-10-16 02:57:03,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-16 02:57:03,072 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 5.375) internal successors, (43), 9 states have internal predecessors, (43), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 30 [2021-10-16 02:57:03,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:57:03,074 INFO L225 Difference]: With dead ends: 274 [2021-10-16 02:57:03,074 INFO L226 Difference]: Without dead ends: 274 [2021-10-16 02:57:03,074 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 324.7ms TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2021-10-16 02:57:03,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274 states. [2021-10-16 02:57:03,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274 to 254. [2021-10-16 02:57:03,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 254 states, 208 states have (on average 1.3221153846153846) internal successors, (275), 230 states have internal predecessors, (275), 18 states have call successors, (18), 9 states have call predecessors, (18), 11 states have return successors, (22), 14 states have call predecessors, (22), 18 states have call successors, (22) [2021-10-16 02:57:03,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 254 states to 254 states and 315 transitions. [2021-10-16 02:57:03,083 INFO L78 Accepts]: Start accepts. Automaton has 254 states and 315 transitions. Word has length 30 [2021-10-16 02:57:03,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:57:03,084 INFO L470 AbstractCegarLoop]: Abstraction has 254 states and 315 transitions. [2021-10-16 02:57:03,084 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 5.375) internal successors, (43), 9 states have internal predecessors, (43), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-10-16 02:57:03,084 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states and 315 transitions. [2021-10-16 02:57:03,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-10-16 02:57:03,088 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:57:03,088 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:57:03,113 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c87352-f820-4e99-96c8-75618c17bcd6/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (45)] Forceful destruction successful, exit code 0 [2021-10-16 02:57:03,301 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c87352-f820-4e99-96c8-75618c17bcd6/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 02:57:03,302 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr24REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 41 more)] === [2021-10-16 02:57:03,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:57:03,304 INFO L82 PathProgramCache]: Analyzing trace with hash 793451563, now seen corresponding path program 1 times [2021-10-16 02:57:03,304 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:57:03,304 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1201186858] [2021-10-16 02:57:03,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:57:03,305 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:57:03,305 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c87352-f820-4e99-96c8-75618c17bcd6/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:57:03,306 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c87352-f820-4e99-96c8-75618c17bcd6/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:57:03,316 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c87352-f820-4e99-96c8-75618c17bcd6/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (46)] Waiting until timeout for monitored process [2021-10-16 02:57:04,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:57:04,167 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 27 conjunts are in the unsatisfiable core [2021-10-16 02:57:04,169 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:57:04,176 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-16 02:57:04,197 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 11 treesize of output 7 [2021-10-16 02:57:04,209 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 11 treesize of output 7 [2021-10-16 02:57:04,264 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 02:57:04,265 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-10-16 02:57:04,287 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 02:57:04,288 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-10-16 02:57:04,455 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-16 02:57:04,455 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 17 [2021-10-16 02:57:04,585 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 02:57:04,586 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 30 [2021-10-16 02:57:04,615 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 02:57:04,617 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 30 [2021-10-16 02:57:04,729 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 02:57:04,745 INFO L354 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2021-10-16 02:57:04,746 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 42 [2021-10-16 02:57:04,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 02:57:04,772 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 02:57:04,773 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 42 [2021-10-16 02:57:04,916 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 02:57:04,962 INFO L354 Elim1Store]: treesize reduction 128, result has 11.7 percent of original size [2021-10-16 02:57:04,963 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 8 case distinctions, treesize of input 95 treesize of output 94 [2021-10-16 02:57:04,968 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 02:57:05,004 INFO L354 Elim1Store]: treesize reduction 188, result has 13.4 percent of original size [2021-10-16 02:57:05,005 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 8 case distinctions, treesize of input 103 treesize of output 102 [2021-10-16 02:57:10,067 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-16 02:57:10,352 INFO L354 Elim1Store]: treesize reduction 271, result has 18.1 percent of original size [2021-10-16 02:57:10,352 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 15 case distinctions, treesize of input 133 treesize of output 128 [2021-10-16 02:57:10,497 INFO L354 Elim1Store]: treesize reduction 168, result has 21.1 percent of original size [2021-10-16 02:57:10,497 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 10 case distinctions, treesize of input 124 treesize of output 122 [2021-10-16 02:57:10,859 INFO L354 Elim1Store]: treesize reduction 72, result has 1.4 percent of original size [2021-10-16 02:57:10,860 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 104 treesize of output 70 [2021-10-16 02:57:10,882 INFO L354 Elim1Store]: treesize reduction 62, result has 1.6 percent of original size [2021-10-16 02:57:10,883 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 59 treesize of output 32 [2021-10-16 02:57:10,964 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:57:10,964 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:57:13,096 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((|ULTIMATE.start_remove_#t~mem7.base| (_ BitVec 32)) (|ULTIMATE.start_remove_#t~mem6.offset| (_ BitVec 32))) (= (_ bv0 32) (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_remove_#t~mem6.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_remove_#t~mem6.base|) |ULTIMATE.start_remove_#t~mem6.offset| |ULTIMATE.start_remove_#t~mem7.base|)) c_ULTIMATE.start_remove_~x.base) c_ULTIMATE.start_remove_~x.offset))) (forall ((|ULTIMATE.start_remove_#t~mem7.offset| (_ BitVec 32)) (|ULTIMATE.start_remove_#t~mem6.offset| (_ BitVec 32))) (= (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_remove_#t~mem6.base| (store (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_remove_#t~mem6.base|) |ULTIMATE.start_remove_#t~mem6.offset| |ULTIMATE.start_remove_#t~mem7.offset|)) c_ULTIMATE.start_remove_~x.base) c_ULTIMATE.start_remove_~x.offset) (_ bv0 32)))) is different from false [2021-10-16 02:57:56,681 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((|ULTIMATE.start_remove_#t~mem7.base| (_ BitVec 32)) (|ULTIMATE.start_remove_#t~mem6.offset| (_ BitVec 32))) (= (select (select (let ((.cse0 (store |c_#memory_$Pointer$.base| c_ULTIMATE.start_main_~tail~0.base (store (select |c_#memory_$Pointer$.base| c_ULTIMATE.start_main_~tail~0.base) (bvadd (_ bv4 32) c_ULTIMATE.start_main_~tail~0.offset) c_ULTIMATE.start_main_~n~0.base)))) (let ((.cse1 (select (select .cse0 c_ULTIMATE.start_main_~x~0.base) (bvadd (_ bv4 32) c_ULTIMATE.start_main_~x~0.offset)))) (store .cse0 .cse1 (store (select .cse0 .cse1) |ULTIMATE.start_remove_#t~mem6.offset| |ULTIMATE.start_remove_#t~mem7.base|)))) c_ULTIMATE.start_main_~x~0.base) c_ULTIMATE.start_main_~x~0.offset) (_ bv0 32))) (forall ((|ULTIMATE.start_remove_#t~mem7.offset| (_ BitVec 32)) (|ULTIMATE.start_remove_#t~mem6.offset| (_ BitVec 32))) (= (select (select (let ((.cse4 (bvadd (_ bv4 32) c_ULTIMATE.start_main_~tail~0.offset))) (let ((.cse2 (store |c_#memory_$Pointer$.offset| c_ULTIMATE.start_main_~tail~0.base (store (select |c_#memory_$Pointer$.offset| c_ULTIMATE.start_main_~tail~0.base) .cse4 c_ULTIMATE.start_main_~n~0.offset))) (.cse3 (select (select (store |c_#memory_$Pointer$.base| c_ULTIMATE.start_main_~tail~0.base (store (select |c_#memory_$Pointer$.base| c_ULTIMATE.start_main_~tail~0.base) .cse4 c_ULTIMATE.start_main_~n~0.base)) c_ULTIMATE.start_main_~x~0.base) (bvadd (_ bv4 32) c_ULTIMATE.start_main_~x~0.offset)))) (store .cse2 .cse3 (store (select .cse2 .cse3) |ULTIMATE.start_remove_#t~mem6.offset| |ULTIMATE.start_remove_#t~mem7.offset|)))) c_ULTIMATE.start_main_~x~0.base) c_ULTIMATE.start_main_~x~0.offset) (_ bv0 32)))) is different from false [2021-10-16 02:57:58,765 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((|ULTIMATE.start_remove_#t~mem7.offset| (_ BitVec 32)) (|ULTIMATE.start_remove_#t~mem6.offset| (_ BitVec 32))) (= (select (select (let ((.cse3 (bvadd (_ bv4 32) c_ULTIMATE.start_main_~tail~0.offset)) (.cse4 (bvadd c_ULTIMATE.start_main_~n~0.offset (_ bv4 32)))) (let ((.cse0 (let ((.cse5 (store |c_#memory_$Pointer$.offset| c_ULTIMATE.start_main_~n~0.base (store (select |c_#memory_$Pointer$.offset| c_ULTIMATE.start_main_~n~0.base) .cse4 (_ bv0 32))))) (store .cse5 c_ULTIMATE.start_main_~tail~0.base (store (select .cse5 c_ULTIMATE.start_main_~tail~0.base) .cse3 c_ULTIMATE.start_main_~n~0.offset)))) (.cse1 (select (select (let ((.cse2 (store |c_#memory_$Pointer$.base| c_ULTIMATE.start_main_~n~0.base (store (select |c_#memory_$Pointer$.base| c_ULTIMATE.start_main_~n~0.base) .cse4 (_ bv0 32))))) (store .cse2 c_ULTIMATE.start_main_~tail~0.base (store (select .cse2 c_ULTIMATE.start_main_~tail~0.base) .cse3 c_ULTIMATE.start_main_~n~0.base))) c_ULTIMATE.start_main_~x~0.base) (bvadd (_ bv4 32) c_ULTIMATE.start_main_~x~0.offset)))) (store .cse0 .cse1 (store (select .cse0 .cse1) |ULTIMATE.start_remove_#t~mem6.offset| |ULTIMATE.start_remove_#t~mem7.offset|)))) c_ULTIMATE.start_main_~x~0.base) c_ULTIMATE.start_main_~x~0.offset) (_ bv0 32))) (forall ((|ULTIMATE.start_remove_#t~mem7.base| (_ BitVec 32)) (|ULTIMATE.start_remove_#t~mem6.offset| (_ BitVec 32))) (= (select (select (let ((.cse6 (let ((.cse8 (store |c_#memory_$Pointer$.base| c_ULTIMATE.start_main_~n~0.base (store (select |c_#memory_$Pointer$.base| c_ULTIMATE.start_main_~n~0.base) (bvadd c_ULTIMATE.start_main_~n~0.offset (_ bv4 32)) (_ bv0 32))))) (store .cse8 c_ULTIMATE.start_main_~tail~0.base (store (select .cse8 c_ULTIMATE.start_main_~tail~0.base) (bvadd (_ bv4 32) c_ULTIMATE.start_main_~tail~0.offset) c_ULTIMATE.start_main_~n~0.base))))) (let ((.cse7 (select (select .cse6 c_ULTIMATE.start_main_~x~0.base) (bvadd (_ bv4 32) c_ULTIMATE.start_main_~x~0.offset)))) (store .cse6 .cse7 (store (select .cse6 .cse7) |ULTIMATE.start_remove_#t~mem6.offset| |ULTIMATE.start_remove_#t~mem7.base|)))) c_ULTIMATE.start_main_~x~0.base) c_ULTIMATE.start_main_~x~0.offset) (_ bv0 32)))) is different from false [2021-10-16 02:58:00,879 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((|ULTIMATE.start_remove_#t~mem7.base| (_ BitVec 32)) (ULTIMATE.start_main_~n~0.offset (_ BitVec 32)) (|ULTIMATE.start_remove_#t~mem6.offset| (_ BitVec 32))) (= (select (select (let ((.cse0 (let ((.cse2 (store |c_#memory_$Pointer$.base| c_ULTIMATE.start_main_~n~0.base (store (store (select |c_#memory_$Pointer$.base| c_ULTIMATE.start_main_~n~0.base) ULTIMATE.start_main_~n~0.offset c_ULTIMATE.start_main_~tail~0.base) (bvadd ULTIMATE.start_main_~n~0.offset (_ bv4 32)) (_ bv0 32))))) (store .cse2 c_ULTIMATE.start_main_~tail~0.base (store (select .cse2 c_ULTIMATE.start_main_~tail~0.base) (bvadd (_ bv4 32) c_ULTIMATE.start_main_~tail~0.offset) c_ULTIMATE.start_main_~n~0.base))))) (let ((.cse1 (select (select .cse0 c_ULTIMATE.start_main_~x~0.base) (bvadd (_ bv4 32) c_ULTIMATE.start_main_~x~0.offset)))) (store .cse0 .cse1 (store (select .cse0 .cse1) |ULTIMATE.start_remove_#t~mem6.offset| |ULTIMATE.start_remove_#t~mem7.base|)))) c_ULTIMATE.start_main_~x~0.base) c_ULTIMATE.start_main_~x~0.offset) (_ bv0 32))) (forall ((ULTIMATE.start_main_~n~0.offset (_ BitVec 32)) (|ULTIMATE.start_remove_#t~mem7.offset| (_ BitVec 32)) (|ULTIMATE.start_remove_#t~mem6.offset| (_ BitVec 32))) (= (select (select (let ((.cse6 (bvadd (_ bv4 32) c_ULTIMATE.start_main_~tail~0.offset)) (.cse7 (bvadd ULTIMATE.start_main_~n~0.offset (_ bv4 32)))) (let ((.cse3 (let ((.cse8 (store |c_#memory_$Pointer$.offset| c_ULTIMATE.start_main_~n~0.base (store (store (select |c_#memory_$Pointer$.offset| c_ULTIMATE.start_main_~n~0.base) ULTIMATE.start_main_~n~0.offset c_ULTIMATE.start_main_~tail~0.offset) .cse7 (_ bv0 32))))) (store .cse8 c_ULTIMATE.start_main_~tail~0.base (store (select .cse8 c_ULTIMATE.start_main_~tail~0.base) .cse6 ULTIMATE.start_main_~n~0.offset)))) (.cse4 (select (select (let ((.cse5 (store |c_#memory_$Pointer$.base| c_ULTIMATE.start_main_~n~0.base (store (store (select |c_#memory_$Pointer$.base| c_ULTIMATE.start_main_~n~0.base) ULTIMATE.start_main_~n~0.offset c_ULTIMATE.start_main_~tail~0.base) .cse7 (_ bv0 32))))) (store .cse5 c_ULTIMATE.start_main_~tail~0.base (store (select .cse5 c_ULTIMATE.start_main_~tail~0.base) .cse6 c_ULTIMATE.start_main_~n~0.base))) c_ULTIMATE.start_main_~x~0.base) (bvadd (_ bv4 32) c_ULTIMATE.start_main_~x~0.offset)))) (store .cse3 .cse4 (store (select .cse3 .cse4) |ULTIMATE.start_remove_#t~mem6.offset| |ULTIMATE.start_remove_#t~mem7.offset|)))) c_ULTIMATE.start_main_~x~0.base) c_ULTIMATE.start_main_~x~0.offset) (_ bv0 32)))) is different from false [2021-10-16 02:58:36,729 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ULTIMATE.start_main_~n~0.base_61 (_ BitVec 32))) (or (and (forall ((ULTIMATE.start_main_~n~0.offset (_ BitVec 32)) (|ULTIMATE.start_remove_#t~mem7.offset| (_ BitVec 32)) (|ULTIMATE.start_remove_#t~mem6.offset| (_ BitVec 32))) (= (select (select (let ((.cse0 (let ((.cse2 (bvadd (_ bv4 32) |c_ULTIMATE.start_main_~#list~0.offset|))) (let ((.cse1 (let ((.cse3 (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_~#list~0.base| (store (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_~#list~0.base|) .cse2 (_ bv0 32))))) (store .cse3 v_ULTIMATE.start_main_~n~0.base_61 (store (store (select .cse3 v_ULTIMATE.start_main_~n~0.base_61) ULTIMATE.start_main_~n~0.offset |c_ULTIMATE.start_main_~#list~0.offset|) (bvadd ULTIMATE.start_main_~n~0.offset (_ bv4 32)) (_ bv0 32)))))) (store .cse1 |c_ULTIMATE.start_main_~#list~0.base| (store (select .cse1 |c_ULTIMATE.start_main_~#list~0.base|) .cse2 ULTIMATE.start_main_~n~0.offset)))))) (store .cse0 v_ULTIMATE.start_main_~n~0.base_61 (store (select .cse0 v_ULTIMATE.start_main_~n~0.base_61) |ULTIMATE.start_remove_#t~mem6.offset| |ULTIMATE.start_remove_#t~mem7.offset|))) |c_ULTIMATE.start_main_~#list~0.base|) |c_ULTIMATE.start_main_~#list~0.offset|) (_ bv0 32))) (forall ((|ULTIMATE.start_remove_#t~mem7.base| (_ BitVec 32)) (ULTIMATE.start_main_~n~0.offset (_ BitVec 32)) (|ULTIMATE.start_remove_#t~mem6.offset| (_ BitVec 32))) (= (select (select (let ((.cse4 (let ((.cse6 (bvadd (_ bv4 32) |c_ULTIMATE.start_main_~#list~0.offset|))) (let ((.cse5 (let ((.cse7 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~#list~0.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~#list~0.base|) .cse6 (_ bv0 32))))) (store .cse7 v_ULTIMATE.start_main_~n~0.base_61 (store (store (select .cse7 v_ULTIMATE.start_main_~n~0.base_61) ULTIMATE.start_main_~n~0.offset |c_ULTIMATE.start_main_~#list~0.base|) (bvadd ULTIMATE.start_main_~n~0.offset (_ bv4 32)) (_ bv0 32)))))) (store .cse5 |c_ULTIMATE.start_main_~#list~0.base| (store (select .cse5 |c_ULTIMATE.start_main_~#list~0.base|) .cse6 v_ULTIMATE.start_main_~n~0.base_61)))))) (store .cse4 v_ULTIMATE.start_main_~n~0.base_61 (store (select .cse4 v_ULTIMATE.start_main_~n~0.base_61) |ULTIMATE.start_remove_#t~mem6.offset| |ULTIMATE.start_remove_#t~mem7.base|))) |c_ULTIMATE.start_main_~#list~0.base|) |c_ULTIMATE.start_main_~#list~0.offset|) (_ bv0 32)))) (not (= (_ bv0 1) (bvneg (bvneg (bvneg (bvneg (select |c_#valid| v_ULTIMATE.start_main_~n~0.base_61))))))))) is different from false [2021-10-16 02:58:40,161 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:58:40,161 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:58:40,161 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1201186858] [2021-10-16 02:58:40,161 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1201186858] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:58:40,161 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [172925376] [2021-10-16 02:58:40,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:58:40,162 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-16 02:58:40,162 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c87352-f820-4e99-96c8-75618c17bcd6/bin/utaipan-mTDlp9Zugs/cvc4 [2021-10-16 02:58:40,166 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c87352-f820-4e99-96c8-75618c17bcd6/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-16 02:58:40,169 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c87352-f820-4e99-96c8-75618c17bcd6/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (47)] Waiting until timeout for monitored process [2021-10-16 02:58:41,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:58:41,432 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 30 conjunts are in the unsatisfiable core [2021-10-16 02:58:41,433 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:58:41,597 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 11 treesize of output 7 [2021-10-16 02:58:41,617 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 11 treesize of output 7 [2021-10-16 02:58:41,806 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 02:58:41,807 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-10-16 02:58:41,823 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 02:58:41,824 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-10-16 02:58:42,739 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 02:58:42,830 INFO L354 Elim1Store]: treesize reduction 36, result has 49.3 percent of original size [2021-10-16 02:58:42,831 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 48 [2021-10-16 02:58:42,894 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 02:58:42,953 INFO L354 Elim1Store]: treesize reduction 54, result has 23.9 percent of original size [2021-10-16 02:58:42,953 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 30 [2021-10-16 02:58:43,492 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 02:58:43,560 INFO L354 Elim1Store]: treesize reduction 108, result has 18.2 percent of original size [2021-10-16 02:58:43,560 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 37 treesize of output 42 [2021-10-16 02:58:43,593 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 02:58:43,599 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 02:58:43,663 INFO L354 Elim1Store]: treesize reduction 88, result has 16.2 percent of original size [2021-10-16 02:58:43,663 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 37 treesize of output 42 [2021-10-16 02:58:44,133 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 02:58:44,214 INFO L354 Elim1Store]: treesize reduction 128, result has 11.7 percent of original size [2021-10-16 02:58:44,215 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 8 case distinctions, treesize of input 97 treesize of output 96 [2021-10-16 02:58:44,234 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 02:58:44,315 INFO L354 Elim1Store]: treesize reduction 188, result has 13.4 percent of original size [2021-10-16 02:58:44,315 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 8 case distinctions, treesize of input 105 treesize of output 104 [2021-10-16 02:59:01,536 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-16 02:59:01,822 INFO L354 Elim1Store]: treesize reduction 344, result has 13.8 percent of original size [2021-10-16 02:59:01,822 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 8 new quantified variables, introduced 21 case distinctions, treesize of input 143 treesize of output 129 [2021-10-16 02:59:02,064 INFO L354 Elim1Store]: treesize reduction 275, result has 13.8 percent of original size [2021-10-16 02:59:02,064 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 15 case distinctions, treesize of input 151 treesize of output 142 [2021-10-16 02:59:02,861 INFO L354 Elim1Store]: treesize reduction 99, result has 25.6 percent of original size [2021-10-16 02:59:02,861 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 9 case distinctions, treesize of input 135 treesize of output 106 [2021-10-16 02:59:04,385 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:59:04,386 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:59:27,862 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((|ULTIMATE.start_remove_#t~mem6.offset| (_ BitVec 32))) (= (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_remove_#t~mem6.base| (store (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_remove_#t~mem6.base|) |ULTIMATE.start_remove_#t~mem6.offset| (select (select |c_#memory_$Pointer$.offset| c_ULTIMATE.start_remove_~x.base) c_ULTIMATE.start_remove_~x.offset))) c_ULTIMATE.start_remove_~x.base) c_ULTIMATE.start_remove_~x.offset) (_ bv0 32))) (forall ((|ULTIMATE.start_remove_#t~mem6.offset| (_ BitVec 32))) (= (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_remove_#t~mem6.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_remove_#t~mem6.base|) |ULTIMATE.start_remove_#t~mem6.offset| (select (select |c_#memory_$Pointer$.base| c_ULTIMATE.start_remove_~x.base) c_ULTIMATE.start_remove_~x.offset))) c_ULTIMATE.start_remove_~x.base) c_ULTIMATE.start_remove_~x.offset) (_ bv0 32)))) is different from false [2021-10-16 03:00:58,111 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ULTIMATE.start_main_~n~0.base_63 (_ BitVec 32))) (or (not (bvult v_ULTIMATE.start_main_~n~0.base_63 |c_#StackHeapBarrier|)) (and (forall ((ULTIMATE.start_main_~n~0.offset (_ BitVec 32))) (= (select (let ((.cse1 (bvadd (_ bv4 32) |c_ULTIMATE.start_main_~#list~0.offset|))) (store (select (let ((.cse0 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~#list~0.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~#list~0.base|) .cse1 (_ bv0 32))))) (store .cse0 v_ULTIMATE.start_main_~n~0.base_63 (store (store (select .cse0 v_ULTIMATE.start_main_~n~0.base_63) ULTIMATE.start_main_~n~0.offset |c_ULTIMATE.start_main_~#list~0.base|) (bvadd ULTIMATE.start_main_~n~0.offset (_ bv4 32)) (_ bv0 32)))) |c_ULTIMATE.start_main_~#list~0.base|) .cse1 v_ULTIMATE.start_main_~n~0.base_63)) |c_ULTIMATE.start_main_~#list~0.offset|) (_ bv0 32))) (forall ((ULTIMATE.start_main_~n~0.offset (_ BitVec 32))) (= (select (let ((.cse3 (bvadd (_ bv4 32) |c_ULTIMATE.start_main_~#list~0.offset|))) (store (select (let ((.cse2 (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_~#list~0.base| (store (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_~#list~0.base|) .cse3 (_ bv0 32))))) (store .cse2 v_ULTIMATE.start_main_~n~0.base_63 (store (store (select .cse2 v_ULTIMATE.start_main_~n~0.base_63) ULTIMATE.start_main_~n~0.offset |c_ULTIMATE.start_main_~#list~0.offset|) (bvadd ULTIMATE.start_main_~n~0.offset (_ bv4 32)) (_ bv0 32)))) |c_ULTIMATE.start_main_~#list~0.base|) .cse3 ULTIMATE.start_main_~n~0.offset)) |c_ULTIMATE.start_main_~#list~0.offset|) (_ bv0 32)))))) is different from false [2021-10-16 03:01:01,337 INFO L354 Elim1Store]: treesize reduction 186, result has 22.5 percent of original size [2021-10-16 03:01:01,338 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 1 new quantified variables, introduced 4 case distinctions, treesize of input 108 treesize of output 122 [2021-10-16 03:01:03,401 INFO L354 Elim1Store]: treesize reduction 186, result has 22.5 percent of original size [2021-10-16 03:01:03,401 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 1 new quantified variables, introduced 4 case distinctions, treesize of input 122 treesize of output 136 [2021-10-16 03:01:03,426 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-16 03:01:03,427 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 136 treesize of output 130 [2021-10-16 03:01:03,451 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-16 03:01:03,451 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 130 treesize of output 124 [2021-10-16 03:01:03,457 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Should have been eliminated by DER [2021-10-16 03:01:03,457 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [203959018] [2021-10-16 03:01:03,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:01:03,458 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 03:01:03,458 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c87352-f820-4e99-96c8-75618c17bcd6/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 03:01:03,478 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c87352-f820-4e99-96c8-75618c17bcd6/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-16 03:01:03,504 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c87352-f820-4e99-96c8-75618c17bcd6/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2021-10-16 03:01:04,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:01:04,939 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 27 conjunts are in the unsatisfiable core [2021-10-16 03:01:04,941 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 03:01:04,949 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.smtlibutils.IncrementalPlicationChecker@246d845 [2021-10-16 03:01:04,949 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-16 03:01:04,950 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 26 [2021-10-16 03:01:04,950 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1793457972] [2021-10-16 03:01:04,950 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-10-16 03:01:04,950 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 03:01:04,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-10-16 03:01:04,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=207, Invalid=1480, Unknown=63, NotChecked=602, Total=2352 [2021-10-16 03:01:04,952 INFO L87 Difference]: Start difference. First operand 254 states and 315 transitions. Second operand has 26 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 26 states have internal predecessors, (53), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-10-16 03:01:04,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-10-16 03:01:04,981 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c87352-f820-4e99-96c8-75618c17bcd6/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2021-10-16 03:01:05,163 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c87352-f820-4e99-96c8-75618c17bcd6/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (46)] Forceful destruction successful, exit code 0 [2021-10-16 03:01:05,357 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c87352-f820-4e99-96c8-75618c17bcd6/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (47)] Ended with exit code 0 [2021-10-16 03:01:05,553 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c87352-f820-4e99-96c8-75618c17bcd6/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true,46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c87352-f820-4e99-96c8-75618c17bcd6/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3,47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c87352-f820-4e99-96c8-75618c17bcd6/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt [2021-10-16 03:01:05,554 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.IllegalStateException: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.smtlibutils.IncrementalPlicationChecker@246d845 at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.ManagedScript.lock(ManagedScript.java:81) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.assertCodeBlock(IncrementalHoareTripleChecker.java:356) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.prepareAssertionStackAndAddTransition(IncrementalHoareTripleChecker.java:204) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.checkInternal(IncrementalHoareTripleChecker.java:129) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.ProtectiveHoareTripleChecker.checkInternal(ProtectiveHoareTripleChecker.java:61) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.EfficientHoareTripleChecker.checkInternal(EfficientHoareTripleChecker.java:63) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.CachingHoareTripleChecker.checkInternal(CachingHoareTripleChecker.java:97) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton$InternalSuccessorComputationHelper.computeSuccWithSolver(AbstractInterpolantAutomaton.java:357) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.DeterministicInterpolantAutomaton.addOtherSuccessors(DeterministicInterpolantAutomaton.java:198) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.BasicAbstractInterpolantAutomaton.computeSuccs(BasicAbstractInterpolantAutomaton.java:78) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.BasicAbstractInterpolantAutomaton.computeSuccs(BasicAbstractInterpolantAutomaton.java:1) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton.internalSuccessors(AbstractInterpolantAutomaton.java:233) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton.internalSuccessors(AbstractInterpolantAutomaton.java:1) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.TotalizeNwa.internalSuccessors(TotalizeNwa.java:213) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ComplementDeterministicNwa.internalSuccessors(ComplementDeterministicNwa.java:121) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ProductNwa.internalSuccessors(ProductNwa.java:216) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ProductNwa.internalSuccessors(ProductNwa.java:208) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates$ReachableStatesComputation.addInternalsAndSuccessors(NestedWordAutomatonReachableStates.java:1058) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates$ReachableStatesComputation.(NestedWordAutomatonReachableStates.java:960) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates.(NestedWordAutomatonReachableStates.java:182) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.Difference.computeDifference(Difference.java:137) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.Difference.(Difference.java:90) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.computeAutomataDifference(BasicCegarLoop.java:864) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.refineAbstraction(BasicCegarLoop.java:778) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.refineAbstractionInternal(AbstractCegarLoop.java:462) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:420) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java: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 03:01:05,559 INFO L168 Benchmark]: Toolchain (without parser) took 442044.50 ms. Allocated memory was 65.0 MB in the beginning and 188.7 MB in the end (delta: 123.7 MB). Free memory was 42.7 MB in the beginning and 36.9 MB in the end (delta: 5.8 MB). Peak memory consumption was 128.3 MB. Max. memory is 16.1 GB. [2021-10-16 03:01:05,560 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 65.0 MB. Free memory is still 45.4 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-16 03:01:05,560 INFO L168 Benchmark]: CACSL2BoogieTranslator took 737.38 ms. Allocated memory was 65.0 MB in the beginning and 81.8 MB in the end (delta: 16.8 MB). Free memory was 42.5 MB in the beginning and 57.1 MB in the end (delta: -14.7 MB). Peak memory consumption was 12.0 MB. Max. memory is 16.1 GB. [2021-10-16 03:01:05,560 INFO L168 Benchmark]: Boogie Procedure Inliner took 60.56 ms. Allocated memory is still 81.8 MB. Free memory was 57.1 MB in the beginning and 54.8 MB in the end (delta: 2.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-16 03:01:05,561 INFO L168 Benchmark]: Boogie Preprocessor took 46.33 ms. Allocated memory is still 81.8 MB. Free memory was 54.8 MB in the beginning and 53.0 MB in the end (delta: 1.9 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-16 03:01:05,561 INFO L168 Benchmark]: RCFGBuilder took 1029.05 ms. Allocated memory is still 81.8 MB. Free memory was 53.0 MB in the beginning and 55.7 MB in the end (delta: -2.7 MB). Peak memory consumption was 19.2 MB. Max. memory is 16.1 GB. [2021-10-16 03:01:05,562 INFO L168 Benchmark]: TraceAbstraction took 440161.72 ms. Allocated memory was 81.8 MB in the beginning and 188.7 MB in the end (delta: 107.0 MB). Free memory was 55.4 MB in the beginning and 36.9 MB in the end (delta: 18.5 MB). Peak memory consumption was 124.5 MB. Max. memory is 16.1 GB. [2021-10-16 03:01:05,564 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 65.0 MB. Free memory is still 45.4 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 737.38 ms. Allocated memory was 65.0 MB in the beginning and 81.8 MB in the end (delta: 16.8 MB). Free memory was 42.5 MB in the beginning and 57.1 MB in the end (delta: -14.7 MB). Peak memory consumption was 12.0 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 60.56 ms. Allocated memory is still 81.8 MB. Free memory was 57.1 MB in the beginning and 54.8 MB in the end (delta: 2.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 46.33 ms. Allocated memory is still 81.8 MB. Free memory was 54.8 MB in the beginning and 53.0 MB in the end (delta: 1.9 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 1029.05 ms. Allocated memory is still 81.8 MB. Free memory was 53.0 MB in the beginning and 55.7 MB in the end (delta: -2.7 MB). Peak memory consumption was 19.2 MB. Max. memory is 16.1 GB. * TraceAbstraction took 440161.72 ms. Allocated memory was 81.8 MB in the beginning and 188.7 MB in the end (delta: 107.0 MB). Free memory was 55.4 MB in the beginning and 36.9 MB in the end (delta: 18.5 MB). Peak memory consumption was 124.5 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: IllegalStateException: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.smtlibutils.IncrementalPlicationChecker@246d845 de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: IllegalStateException: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.smtlibutils.IncrementalPlicationChecker@246d845: de.uni_freiburg.informatik.ultimate.lib.smtlibutils.ManagedScript.lock(ManagedScript.java:81) RESULT: Ultimate could not prove your program: Toolchain returned no result. [2021-10-16 03:01:05,694 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0c87352-f820-4e99-96c8-75618c17bcd6/bin/utaipan-mTDlp9Zugs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request...