./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 4e77c044 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d741eefd-52c0-40a6-978a-2e20a377e48b/bin/utaipan-q2qaUkNPG8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d741eefd-52c0-40a6-978a-2e20a377e48b/bin/utaipan-q2qaUkNPG8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d741eefd-52c0-40a6-978a-2e20a377e48b/bin/utaipan-q2qaUkNPG8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d741eefd-52c0-40a6-978a-2e20a377e48b/bin/utaipan-q2qaUkNPG8/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/heap-manipulation/dancing.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d741eefd-52c0-40a6-978a-2e20a377e48b/bin/utaipan-q2qaUkNPG8/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d741eefd-52c0-40a6-978a-2e20a377e48b/bin/utaipan-q2qaUkNPG8 --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_d741eefd-52c0-40a6-978a-2e20a377e48b/bin/utaipan-q2qaUkNPG8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d741eefd-52c0-40a6-978a-2e20a377e48b/bin/utaipan-q2qaUkNPG8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d741eefd-52c0-40a6-978a-2e20a377e48b/bin/utaipan-q2qaUkNPG8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d741eefd-52c0-40a6-978a-2e20a377e48b/bin/utaipan-q2qaUkNPG8/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/heap-manipulation/dancing.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d741eefd-52c0-40a6-978a-2e20a377e48b/bin/utaipan-q2qaUkNPG8/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d741eefd-52c0-40a6-978a-2e20a377e48b/bin/utaipan-q2qaUkNPG8 --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@6637c36a --- Real Ultimate output --- This is Ultimate 0.2.1-dev-4e77c04 [2021-10-13 08:16:19,308 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-13 08:16:19,310 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-13 08:16:19,356 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-13 08:16:19,357 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-13 08:16:19,358 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-13 08:16:19,360 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-13 08:16:19,363 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-13 08:16:19,365 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-13 08:16:19,366 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-13 08:16:19,368 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-13 08:16:19,369 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-13 08:16:19,370 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-13 08:16:19,372 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-13 08:16:19,374 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-13 08:16:19,375 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-13 08:16:19,376 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-13 08:16:19,378 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-13 08:16:19,380 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-13 08:16:19,383 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-13 08:16:19,385 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-13 08:16:19,386 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-13 08:16:19,388 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-13 08:16:19,389 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-13 08:16:19,393 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-13 08:16:19,394 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-13 08:16:19,394 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-13 08:16:19,396 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-13 08:16:19,396 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-13 08:16:19,398 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-13 08:16:19,398 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-13 08:16:19,399 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-13 08:16:19,400 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-13 08:16:19,401 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-13 08:16:19,403 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-13 08:16:19,403 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-13 08:16:19,404 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-13 08:16:19,405 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-13 08:16:19,405 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-13 08:16:19,406 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-13 08:16:19,407 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-13 08:16:19,410 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d741eefd-52c0-40a6-978a-2e20a377e48b/bin/utaipan-q2qaUkNPG8/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2021-10-13 08:16:19,455 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-13 08:16:19,459 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-13 08:16:19,460 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-13 08:16:19,463 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-13 08:16:19,463 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-13 08:16:19,463 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-13 08:16:19,463 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-10-13 08:16:19,463 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-13 08:16:19,464 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-13 08:16:19,464 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-10-13 08:16:19,464 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-10-13 08:16:19,464 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-13 08:16:19,465 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-10-13 08:16:19,465 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-10-13 08:16:19,465 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-10-13 08:16:19,466 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-13 08:16:19,466 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-13 08:16:19,466 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-13 08:16:19,467 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-13 08:16:19,467 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-10-13 08:16:19,467 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-13 08:16:19,467 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-13 08:16:19,468 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-13 08:16:19,468 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-10-13 08:16:19,468 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-10-13 08:16:19,468 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-10-13 08:16:19,468 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-13 08:16:19,469 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-13 08:16:19,469 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-13 08:16:19,469 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-13 08:16:19,469 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-13 08:16:19,470 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-13 08:16:19,470 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 08:16:19,470 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-13 08:16:19,470 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-13 08:16:19,471 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-10-13 08:16:19,471 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-13 08:16:19,471 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-13 08:16:19,471 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-13 08:16:19,472 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_d741eefd-52c0-40a6-978a-2e20a377e48b/bin/utaipan-q2qaUkNPG8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d741eefd-52c0-40a6-978a-2e20a377e48b/bin/utaipan-q2qaUkNPG8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 61aa671d60c63a9c0aa1f89d5d2982cadbc06881 [2021-10-13 08:16:19,731 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-13 08:16:19,762 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-13 08:16:19,767 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-13 08:16:19,768 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-13 08:16:19,769 INFO L275 PluginConnector]: CDTParser initialized [2021-10-13 08:16:19,770 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d741eefd-52c0-40a6-978a-2e20a377e48b/bin/utaipan-q2qaUkNPG8/../../sv-benchmarks/c/heap-manipulation/dancing.i [2021-10-13 08:16:19,853 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d741eefd-52c0-40a6-978a-2e20a377e48b/bin/utaipan-q2qaUkNPG8/data/39db02c45/8cc4021506974a1aa87d28649099d26d/FLAG9dd7418c8 [2021-10-13 08:16:20,365 INFO L306 CDTParser]: Found 1 translation units. [2021-10-13 08:16:20,366 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d741eefd-52c0-40a6-978a-2e20a377e48b/sv-benchmarks/c/heap-manipulation/dancing.i [2021-10-13 08:16:20,388 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d741eefd-52c0-40a6-978a-2e20a377e48b/bin/utaipan-q2qaUkNPG8/data/39db02c45/8cc4021506974a1aa87d28649099d26d/FLAG9dd7418c8 [2021-10-13 08:16:20,671 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d741eefd-52c0-40a6-978a-2e20a377e48b/bin/utaipan-q2qaUkNPG8/data/39db02c45/8cc4021506974a1aa87d28649099d26d [2021-10-13 08:16:20,673 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-13 08:16:20,675 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-13 08:16:20,677 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-13 08:16:20,677 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-13 08:16:20,681 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-13 08:16:20,681 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 08:16:20" (1/1) ... [2021-10-13 08:16:20,683 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7f487dd7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:16:20, skipping insertion in model container [2021-10-13 08:16:20,683 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 08:16:20" (1/1) ... [2021-10-13 08:16:20,691 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-13 08:16:20,734 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-13 08:16:20,932 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_d741eefd-52c0-40a6-978a-2e20a377e48b/sv-benchmarks/c/heap-manipulation/dancing.i[938,951] [2021-10-13 08:16:21,066 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 08:16:21,076 INFO L203 MainTranslator]: Completed pre-run [2021-10-13 08:16:21,088 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_d741eefd-52c0-40a6-978a-2e20a377e48b/sv-benchmarks/c/heap-manipulation/dancing.i[938,951] [2021-10-13 08:16:21,119 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 08:16:21,149 INFO L208 MainTranslator]: Completed translation [2021-10-13 08:16:21,150 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:16:21 WrapperNode [2021-10-13 08:16:21,150 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-13 08:16:21,152 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-13 08:16:21,152 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-13 08:16:21,152 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-13 08:16:21,160 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:16:21" (1/1) ... [2021-10-13 08:16:21,174 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:16:21" (1/1) ... [2021-10-13 08:16:21,210 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-13 08:16:21,210 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-13 08:16:21,211 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-13 08:16:21,211 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-13 08:16:21,218 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:16:21" (1/1) ... [2021-10-13 08:16:21,218 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:16:21" (1/1) ... [2021-10-13 08:16:21,222 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:16:21" (1/1) ... [2021-10-13 08:16:21,223 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:16:21" (1/1) ... [2021-10-13 08:16:21,231 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:16:21" (1/1) ... [2021-10-13 08:16:21,235 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:16:21" (1/1) ... [2021-10-13 08:16:21,238 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:16:21" (1/1) ... [2021-10-13 08:16:21,241 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-13 08:16:21,242 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-13 08:16:21,243 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-13 08:16:21,243 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-13 08:16:21,244 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:16:21" (1/1) ... [2021-10-13 08:16:21,257 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 08:16:21,268 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d741eefd-52c0-40a6-978a-2e20a377e48b/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 08:16:21,279 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d741eefd-52c0-40a6-978a-2e20a377e48b/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-13 08:16:21,283 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d741eefd-52c0-40a6-978a-2e20a377e48b/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-13 08:16:21,319 INFO L130 BoogieDeclarations]: Found specification of procedure is_list_containing_x [2021-10-13 08:16:21,319 INFO L138 BoogieDeclarations]: Found implementation of procedure is_list_containing_x [2021-10-13 08:16:21,320 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-10-13 08:16:21,320 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-10-13 08:16:21,320 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-13 08:16:21,320 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-10-13 08:16:21,321 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-13 08:16:21,321 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-13 08:16:21,321 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-13 08:16:21,321 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-13 08:16:21,909 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-13 08:16:21,910 INFO L299 CfgBuilder]: Removed 15 assume(true) statements. [2021-10-13 08:16:21,912 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 08:16:21 BoogieIcfgContainer [2021-10-13 08:16:21,913 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-13 08:16:21,915 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-13 08:16:21,915 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-13 08:16:21,919 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-13 08:16:21,919 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 08:16:20" (1/3) ... [2021-10-13 08:16:21,920 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@450aeb9a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 08:16:21, skipping insertion in model container [2021-10-13 08:16:21,920 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:16:21" (2/3) ... [2021-10-13 08:16:21,921 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@450aeb9a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 08:16:21, skipping insertion in model container [2021-10-13 08:16:21,921 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 08:16:21" (3/3) ... [2021-10-13 08:16:21,923 INFO L111 eAbstractionObserver]: Analyzing ICFG dancing.i [2021-10-13 08:16:21,932 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-13 08:16:21,938 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 45 error locations. [2021-10-13 08:16:21,989 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-13 08:16:21,995 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 [2021-10-13 08:16:21,996 INFO L340 AbstractCegarLoop]: Starting to check reachability of 45 error locations. [2021-10-13 08:16:22,014 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) [2021-10-13 08:16:22,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2021-10-13 08:16:22,021 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 08:16:22,021 INFO L512 BasicCegarLoop]: trace histogram [1, 1] [2021-10-13 08:16:22,022 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 41 more)] === [2021-10-13 08:16:22,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 08:16:22,027 INFO L82 PathProgramCache]: Analyzing trace with hash 6824, now seen corresponding path program 1 times [2021-10-13 08:16:22,037 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 08:16:22,037 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1535070217] [2021-10-13 08:16:22,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:16:22,039 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 08:16:22,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:16:22,199 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:16:22,199 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 08:16:22,200 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1535070217] [2021-10-13 08:16:22,200 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1535070217] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 08:16:22,201 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 08:16:22,201 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-10-13 08:16:22,203 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [408085306] [2021-10-13 08:16:22,208 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-13 08:16:22,209 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-13 08:16:22,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-13 08:16:22,223 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 08:16:22,226 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) [2021-10-13 08:16:22,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 08:16:22,336 INFO L93 Difference]: Finished difference Result 95 states and 106 transitions. [2021-10-13 08:16:22,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-13 08:16:22,338 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 [2021-10-13 08:16:22,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 08:16:22,346 INFO L225 Difference]: With dead ends: 95 [2021-10-13 08:16:22,347 INFO L226 Difference]: Without dead ends: 94 [2021-10-13 08:16:22,348 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.0ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 08:16:22,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2021-10-13 08:16:22,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 94. [2021-10-13 08:16:22,405 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) [2021-10-13 08:16:22,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 105 transitions. [2021-10-13 08:16:22,409 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 105 transitions. Word has length 2 [2021-10-13 08:16:22,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 08:16:22,410 INFO L470 AbstractCegarLoop]: Abstraction has 94 states and 105 transitions. [2021-10-13 08:16:22,410 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) [2021-10-13 08:16:22,410 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 105 transitions. [2021-10-13 08:16:22,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2021-10-13 08:16:22,411 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 08:16:22,411 INFO L512 BasicCegarLoop]: trace histogram [1, 1] [2021-10-13 08:16:22,411 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-13 08:16:22,412 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 41 more)] === [2021-10-13 08:16:22,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 08:16:22,413 INFO L82 PathProgramCache]: Analyzing trace with hash 6825, now seen corresponding path program 1 times [2021-10-13 08:16:22,413 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 08:16:22,413 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1553204864] [2021-10-13 08:16:22,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:16:22,414 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 08:16:22,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:16:22,486 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:16:22,486 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 08:16:22,487 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1553204864] [2021-10-13 08:16:22,487 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1553204864] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 08:16:22,487 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 08:16:22,487 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-10-13 08:16:22,488 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1914487869] [2021-10-13 08:16:22,489 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-13 08:16:22,489 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-13 08:16:22,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-13 08:16:22,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 08:16:22,490 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) [2021-10-13 08:16:22,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 08:16:22,572 INFO L93 Difference]: Finished difference Result 92 states and 103 transitions. [2021-10-13 08:16:22,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-13 08:16:22,573 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 [2021-10-13 08:16:22,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 08:16:22,575 INFO L225 Difference]: With dead ends: 92 [2021-10-13 08:16:22,575 INFO L226 Difference]: Without dead ends: 92 [2021-10-13 08:16:22,576 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.4ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 08:16:22,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2021-10-13 08:16:22,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 92. [2021-10-13 08:16:22,583 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) [2021-10-13 08:16:22,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 103 transitions. [2021-10-13 08:16:22,586 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 103 transitions. Word has length 2 [2021-10-13 08:16:22,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 08:16:22,586 INFO L470 AbstractCegarLoop]: Abstraction has 92 states and 103 transitions. [2021-10-13 08:16:22,586 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) [2021-10-13 08:16:22,587 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 103 transitions. [2021-10-13 08:16:22,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-10-13 08:16:22,587 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 08:16:22,587 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-10-13 08:16:22,588 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-13 08:16:22,588 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 41 more)] === [2021-10-13 08:16:22,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 08:16:22,589 INFO L82 PathProgramCache]: Analyzing trace with hash 2011745858, now seen corresponding path program 1 times [2021-10-13 08:16:22,589 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 08:16:22,589 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1608300986] [2021-10-13 08:16:22,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:16:22,590 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 08:16:22,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:16:22,638 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:16:22,638 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 08:16:22,638 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1608300986] [2021-10-13 08:16:22,639 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1608300986] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 08:16:22,639 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 08:16:22,639 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-13 08:16:22,639 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [569308468] [2021-10-13 08:16:22,640 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-13 08:16:22,640 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-13 08:16:22,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-13 08:16:22,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 08:16:22,641 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) [2021-10-13 08:16:22,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 08:16:22,790 INFO L93 Difference]: Finished difference Result 154 states and 174 transitions. [2021-10-13 08:16:22,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-13 08:16:22,791 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 [2021-10-13 08:16:22,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 08:16:22,796 INFO L225 Difference]: With dead ends: 154 [2021-10-13 08:16:22,797 INFO L226 Difference]: Without dead ends: 154 [2021-10-13 08:16:22,797 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.4ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 08:16:22,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2021-10-13 08:16:22,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 90. [2021-10-13 08:16:22,820 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) [2021-10-13 08:16:22,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 101 transitions. [2021-10-13 08:16:22,827 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 101 transitions. Word has length 6 [2021-10-13 08:16:22,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 08:16:22,828 INFO L470 AbstractCegarLoop]: Abstraction has 90 states and 101 transitions. [2021-10-13 08:16:22,829 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) [2021-10-13 08:16:22,829 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 101 transitions. [2021-10-13 08:16:22,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-10-13 08:16:22,829 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 08:16:22,830 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-10-13 08:16:22,831 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-10-13 08:16:22,831 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 41 more)] === [2021-10-13 08:16:22,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 08:16:22,833 INFO L82 PathProgramCache]: Analyzing trace with hash 2011745859, now seen corresponding path program 1 times [2021-10-13 08:16:22,833 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 08:16:22,833 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1492432787] [2021-10-13 08:16:22,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:16:22,834 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 08:16:22,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:16:22,929 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:16:22,930 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 08:16:22,930 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1492432787] [2021-10-13 08:16:22,933 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1492432787] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 08:16:22,934 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 08:16:22,934 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-13 08:16:22,935 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1447208834] [2021-10-13 08:16:22,935 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-13 08:16:22,935 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-13 08:16:22,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-13 08:16:22,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 08:16:22,937 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) [2021-10-13 08:16:23,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 08:16:23,078 INFO L93 Difference]: Finished difference Result 154 states and 173 transitions. [2021-10-13 08:16:23,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-13 08:16:23,079 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 [2021-10-13 08:16:23,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 08:16:23,080 INFO L225 Difference]: With dead ends: 154 [2021-10-13 08:16:23,081 INFO L226 Difference]: Without dead ends: 154 [2021-10-13 08:16:23,083 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.0ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 08:16:23,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2021-10-13 08:16:23,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 88. [2021-10-13 08:16:23,097 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) [2021-10-13 08:16:23,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 99 transitions. [2021-10-13 08:16:23,102 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 99 transitions. Word has length 6 [2021-10-13 08:16:23,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 08:16:23,103 INFO L470 AbstractCegarLoop]: Abstraction has 88 states and 99 transitions. [2021-10-13 08:16:23,103 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) [2021-10-13 08:16:23,103 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 99 transitions. [2021-10-13 08:16:23,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-10-13 08:16:23,104 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 08:16:23,104 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 08:16:23,105 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-10-13 08:16:23,105 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)] === [2021-10-13 08:16:23,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 08:16:23,106 INFO L82 PathProgramCache]: Analyzing trace with hash 717900798, now seen corresponding path program 1 times [2021-10-13 08:16:23,106 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 08:16:23,107 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1511350836] [2021-10-13 08:16:23,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:16:23,107 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 08:16:23,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:16:23,214 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:16:23,214 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 08:16:23,214 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1511350836] [2021-10-13 08:16:23,215 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1511350836] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 08:16:23,215 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 08:16:23,215 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-10-13 08:16:23,215 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1304185449] [2021-10-13 08:16:23,216 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-13 08:16:23,216 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-13 08:16:23,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-13 08:16:23,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-13 08:16:23,218 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) [2021-10-13 08:16:23,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 08:16:23,304 INFO L93 Difference]: Finished difference Result 164 states and 187 transitions. [2021-10-13 08:16:23,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-13 08:16:23,305 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 [2021-10-13 08:16:23,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 08:16:23,308 INFO L225 Difference]: With dead ends: 164 [2021-10-13 08:16:23,308 INFO L226 Difference]: Without dead ends: 164 [2021-10-13 08:16:23,309 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 30.7ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-13 08:16:23,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2021-10-13 08:16:23,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 122. [2021-10-13 08:16:23,332 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) [2021-10-13 08:16:23,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 171 transitions. [2021-10-13 08:16:23,335 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 171 transitions. Word has length 8 [2021-10-13 08:16:23,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 08:16:23,335 INFO L470 AbstractCegarLoop]: Abstraction has 122 states and 171 transitions. [2021-10-13 08:16:23,335 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) [2021-10-13 08:16:23,336 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 171 transitions. [2021-10-13 08:16:23,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-10-13 08:16:23,336 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 08:16:23,336 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 08:16:23,337 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-10-13 08:16:23,337 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 41 more)] === [2021-10-13 08:16:23,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 08:16:23,338 INFO L82 PathProgramCache]: Analyzing trace with hash 552486246, now seen corresponding path program 1 times [2021-10-13 08:16:23,340 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 08:16:23,341 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [927611686] [2021-10-13 08:16:23,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:16:23,342 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 08:16:23,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:16:23,492 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:16:23,493 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 08:16:23,493 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [927611686] [2021-10-13 08:16:23,493 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [927611686] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 08:16:23,498 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 08:16:23,499 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-13 08:16:23,499 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [984780952] [2021-10-13 08:16:23,500 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-13 08:16:23,500 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-13 08:16:23,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-13 08:16:23,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-13 08:16:23,501 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) [2021-10-13 08:16:23,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 08:16:23,603 INFO L93 Difference]: Finished difference Result 121 states and 170 transitions. [2021-10-13 08:16:23,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-13 08:16:23,604 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 [2021-10-13 08:16:23,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 08:16:23,605 INFO L225 Difference]: With dead ends: 121 [2021-10-13 08:16:23,605 INFO L226 Difference]: Without dead ends: 121 [2021-10-13 08:16:23,605 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 25.5ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-13 08:16:23,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2021-10-13 08:16:23,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 121. [2021-10-13 08:16:23,613 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) [2021-10-13 08:16:23,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 170 transitions. [2021-10-13 08:16:23,616 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 170 transitions. Word has length 8 [2021-10-13 08:16:23,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 08:16:23,617 INFO L470 AbstractCegarLoop]: Abstraction has 121 states and 170 transitions. [2021-10-13 08:16:23,617 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) [2021-10-13 08:16:23,617 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 170 transitions. [2021-10-13 08:16:23,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-10-13 08:16:23,618 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 08:16:23,618 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 08:16:23,618 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-10-13 08:16:23,618 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 41 more)] === [2021-10-13 08:16:23,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 08:16:23,619 INFO L82 PathProgramCache]: Analyzing trace with hash 552486245, now seen corresponding path program 1 times [2021-10-13 08:16:23,619 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 08:16:23,624 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1820701039] [2021-10-13 08:16:23,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:16:23,624 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 08:16:23,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:16:23,734 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:16:23,734 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 08:16:23,734 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1820701039] [2021-10-13 08:16:23,735 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1820701039] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 08:16:23,735 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 08:16:23,735 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-13 08:16:23,735 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1556556570] [2021-10-13 08:16:23,736 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-13 08:16:23,736 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-13 08:16:23,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-13 08:16:23,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-10-13 08:16:23,737 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) [2021-10-13 08:16:23,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 08:16:23,831 INFO L93 Difference]: Finished difference Result 120 states and 169 transitions. [2021-10-13 08:16:23,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-13 08:16:23,831 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 [2021-10-13 08:16:23,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 08:16:23,833 INFO L225 Difference]: With dead ends: 120 [2021-10-13 08:16:23,833 INFO L226 Difference]: Without dead ends: 120 [2021-10-13 08:16:23,833 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 14.8ms TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-10-13 08:16:23,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2021-10-13 08:16:23,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 120. [2021-10-13 08:16:23,838 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) [2021-10-13 08:16:23,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 169 transitions. [2021-10-13 08:16:23,841 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 169 transitions. Word has length 8 [2021-10-13 08:16:23,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 08:16:23,843 INFO L470 AbstractCegarLoop]: Abstraction has 120 states and 169 transitions. [2021-10-13 08:16:23,843 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) [2021-10-13 08:16:23,843 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 169 transitions. [2021-10-13 08:16:23,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-10-13 08:16:23,844 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 08:16:23,844 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 08:16:23,844 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-10-13 08:16:23,845 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 41 more)] === [2021-10-13 08:16:23,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 08:16:23,845 INFO L82 PathProgramCache]: Analyzing trace with hash -1954879465, now seen corresponding path program 1 times [2021-10-13 08:16:23,845 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 08:16:23,846 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [339636011] [2021-10-13 08:16:23,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:16:23,846 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 08:16:23,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:16:23,922 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:16:23,923 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 08:16:23,923 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [339636011] [2021-10-13 08:16:23,923 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [339636011] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 08:16:23,923 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 08:16:23,923 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-10-13 08:16:23,924 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [98795810] [2021-10-13 08:16:23,924 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-13 08:16:23,924 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-13 08:16:23,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-13 08:16:23,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-13 08:16:23,925 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) [2021-10-13 08:16:24,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 08:16:24,131 INFO L93 Difference]: Finished difference Result 147 states and 167 transitions. [2021-10-13 08:16:24,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-13 08:16:24,131 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 [2021-10-13 08:16:24,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 08:16:24,132 INFO L225 Difference]: With dead ends: 147 [2021-10-13 08:16:24,133 INFO L226 Difference]: Without dead ends: 147 [2021-10-13 08:16:24,133 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 29.0ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-10-13 08:16:24,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2021-10-13 08:16:24,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 115. [2021-10-13 08:16:24,137 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) [2021-10-13 08:16:24,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 158 transitions. [2021-10-13 08:16:24,138 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 158 transitions. Word has length 11 [2021-10-13 08:16:24,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 08:16:24,138 INFO L470 AbstractCegarLoop]: Abstraction has 115 states and 158 transitions. [2021-10-13 08:16:24,138 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) [2021-10-13 08:16:24,138 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 158 transitions. [2021-10-13 08:16:24,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-10-13 08:16:24,139 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 08:16:24,139 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 08:16:24,139 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-10-13 08:16:24,139 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 41 more)] === [2021-10-13 08:16:24,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 08:16:24,140 INFO L82 PathProgramCache]: Analyzing trace with hash -1954879464, now seen corresponding path program 1 times [2021-10-13 08:16:24,140 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 08:16:24,140 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [765678900] [2021-10-13 08:16:24,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:16:24,140 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 08:16:24,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:16:24,219 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:16:24,220 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 08:16:24,220 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [765678900] [2021-10-13 08:16:24,220 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [765678900] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 08:16:24,220 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 08:16:24,220 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-10-13 08:16:24,221 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1383193353] [2021-10-13 08:16:24,221 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-13 08:16:24,221 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-13 08:16:24,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-13 08:16:24,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-13 08:16:24,222 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) [2021-10-13 08:16:24,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 08:16:24,465 INFO L93 Difference]: Finished difference Result 143 states and 162 transitions. [2021-10-13 08:16:24,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-13 08:16:24,465 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 [2021-10-13 08:16:24,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 08:16:24,466 INFO L225 Difference]: With dead ends: 143 [2021-10-13 08:16:24,466 INFO L226 Difference]: Without dead ends: 143 [2021-10-13 08:16:24,466 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 52.1ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-10-13 08:16:24,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2021-10-13 08:16:24,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 115. [2021-10-13 08:16:24,470 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) [2021-10-13 08:16:24,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 152 transitions. [2021-10-13 08:16:24,472 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 152 transitions. Word has length 11 [2021-10-13 08:16:24,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 08:16:24,472 INFO L470 AbstractCegarLoop]: Abstraction has 115 states and 152 transitions. [2021-10-13 08:16:24,472 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) [2021-10-13 08:16:24,472 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 152 transitions. [2021-10-13 08:16:24,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-10-13 08:16:24,473 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 08:16:24,473 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 08:16:24,473 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-10-13 08:16:24,473 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)] === [2021-10-13 08:16:24,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 08:16:24,474 INFO L82 PathProgramCache]: Analyzing trace with hash -812073304, now seen corresponding path program 1 times [2021-10-13 08:16:24,474 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 08:16:24,474 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [328762322] [2021-10-13 08:16:24,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:16:24,474 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 08:16:24,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:16:24,515 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:16:24,515 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 08:16:24,516 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [328762322] [2021-10-13 08:16:24,516 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [328762322] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 08:16:24,516 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [569470672] [2021-10-13 08:16:24,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:16:24,516 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 08:16:24,516 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d741eefd-52c0-40a6-978a-2e20a377e48b/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 08:16:24,518 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d741eefd-52c0-40a6-978a-2e20a377e48b/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 08:16:24,553 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d741eefd-52c0-40a6-978a-2e20a377e48b/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-13 08:16:24,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:16:24,609 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-13 08:16:24,616 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:16:24,767 INFO L354 Elim1Store]: treesize reduction 83, result has 23.9 percent of original size [2021-10-13 08:16:24,768 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 [2021-10-13 08:16:25,416 INFO L354 Elim1Store]: treesize reduction 120, result has 23.6 percent of original size [2021-10-13 08:16:25,416 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 [2021-10-13 08:16:29,221 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:16:29,221 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 08:16:29,293 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:16:29,293 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [569470672] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 08:16:29,293 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2021-10-13 08:16:29,294 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [5] total 10 [2021-10-13 08:16:29,294 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2013601078] [2021-10-13 08:16:29,294 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-13 08:16:29,294 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-13 08:16:29,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-13 08:16:29,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-10-13 08:16:29,295 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) [2021-10-13 08:16:29,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 08:16:29,596 INFO L93 Difference]: Finished difference Result 127 states and 167 transitions. [2021-10-13 08:16:29,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-13 08:16:29,597 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 [2021-10-13 08:16:29,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 08:16:29,598 INFO L225 Difference]: With dead ends: 127 [2021-10-13 08:16:29,598 INFO L226 Difference]: Without dead ends: 127 [2021-10-13 08:16:29,598 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 127.2ms TimeCoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-10-13 08:16:29,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2021-10-13 08:16:29,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 123. [2021-10-13 08:16:29,603 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) [2021-10-13 08:16:29,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 164 transitions. [2021-10-13 08:16:29,604 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 164 transitions. Word has length 13 [2021-10-13 08:16:29,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 08:16:29,605 INFO L470 AbstractCegarLoop]: Abstraction has 123 states and 164 transitions. [2021-10-13 08:16:29,605 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) [2021-10-13 08:16:29,605 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 164 transitions. [2021-10-13 08:16:29,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-10-13 08:16:29,606 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 08:16:29,606 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 08:16:29,645 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d741eefd-52c0-40a6-978a-2e20a377e48b/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-10-13 08:16:29,819 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d741eefd-52c0-40a6-978a-2e20a377e48b/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-10-13 08:16:29,819 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)] === [2021-10-13 08:16:29,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 08:16:29,819 INFO L82 PathProgramCache]: Analyzing trace with hash -812073303, now seen corresponding path program 1 times [2021-10-13 08:16:29,820 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 08:16:29,820 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [497154520] [2021-10-13 08:16:29,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:16:29,820 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 08:16:29,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:16:29,936 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:16:29,936 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 08:16:29,936 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [497154520] [2021-10-13 08:16:29,936 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [497154520] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 08:16:29,936 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [380648359] [2021-10-13 08:16:29,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:16:29,937 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 08:16:29,937 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d741eefd-52c0-40a6-978a-2e20a377e48b/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 08:16:29,938 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d741eefd-52c0-40a6-978a-2e20a377e48b/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 08:16:29,968 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d741eefd-52c0-40a6-978a-2e20a377e48b/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-10-13 08:16:30,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:16:30,069 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 29 conjunts are in the unsatisfiable core [2021-10-13 08:16:30,070 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:16:30,146 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-10-13 08:16:30,147 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 [2021-10-13 08:16:30,597 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:16:30,597 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 08:16:31,020 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 [2021-10-13 08:16:31,059 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:16:31,059 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [380648359] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 08:16:31,059 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [59872242] [2021-10-13 08:16:31,084 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2021-10-13 08:16:31,084 INFO L166 IcfgInterpreter]: Building call graph [2021-10-13 08:16:31,091 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-10-13 08:16:31,096 INFO L176 IcfgInterpreter]: Starting interpretation [2021-10-13 08:16:31,097 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-10-13 08:16:31,128 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 08:16:31,129 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-13 08:16:31,130 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 08:16:31,131 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 61 [2021-10-13 08:16:31,132 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-13 08:16:31,132 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 08:16:31,133 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-10-13 08:16:31,134 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 131 [2021-10-13 08:16:31,151 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 08:16:31,152 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 08:16:31,153 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 08:16:31,155 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 [2021-10-13 08:16:31,156 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 08:16:31,156 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-10-13 08:16:31,157 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 08:16:31,157 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-10-13 08:16:31,159 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-10-13 08:16:31,161 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-13 08:16:31,180 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 08:16:31,181 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 08:16:31,183 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 131 [2021-10-13 08:16:31,184 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-10-13 08:16:31,185 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:128, output treesize:131 [2021-10-13 08:16:31,218 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d741eefd-52c0-40a6-978a-2e20a377e48b/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-10-13 08:16:31,403 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d741eefd-52c0-40a6-978a-2e20a377e48b/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-10-13 08:16:31,403 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) [2021-10-13 08:16:31,406 INFO L168 Benchmark]: Toolchain (without parser) took 10730.96 ms. Allocated memory was 125.8 MB in the beginning and 157.3 MB in the end (delta: 31.5 MB). Free memory was 82.0 MB in the beginning and 48.2 MB in the end (delta: 33.8 MB). Peak memory consumption was 65.4 MB. Max. memory is 16.1 GB. [2021-10-13 08:16:31,407 INFO L168 Benchmark]: CDTParser took 0.37 ms. Allocated memory is still 125.8 MB. Free memory was 100.4 MB in the beginning and 100.3 MB in the end (delta: 80.2 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-13 08:16:31,407 INFO L168 Benchmark]: CACSL2BoogieTranslator took 473.97 ms. Allocated memory is still 125.8 MB. Free memory was 81.8 MB in the beginning and 91.8 MB in the end (delta: -10.0 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-10-13 08:16:31,407 INFO L168 Benchmark]: Boogie Procedure Inliner took 58.29 ms. Allocated memory is still 125.8 MB. Free memory was 91.8 MB in the beginning and 89.7 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-13 08:16:31,408 INFO L168 Benchmark]: Boogie Preprocessor took 31.16 ms. Allocated memory is still 125.8 MB. Free memory was 89.7 MB in the beginning and 88.1 MB in the end (delta: 1.6 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-13 08:16:31,408 INFO L168 Benchmark]: RCFGBuilder took 670.44 ms. Allocated memory is still 125.8 MB. Free memory was 88.1 MB in the beginning and 65.8 MB in the end (delta: 22.3 MB). Peak memory consumption was 23.1 MB. Max. memory is 16.1 GB. [2021-10-13 08:16:31,409 INFO L168 Benchmark]: TraceAbstraction took 9490.61 ms. Allocated memory was 125.8 MB in the beginning and 157.3 MB in the end (delta: 31.5 MB). Free memory was 65.4 MB in the beginning and 48.2 MB in the end (delta: 17.3 MB). Peak memory consumption was 50.8 MB. Max. memory is 16.1 GB. [2021-10-13 08:16:31,411 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.37 ms. Allocated memory is still 125.8 MB. Free memory was 100.4 MB in the beginning and 100.3 MB in the end (delta: 80.2 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 473.97 ms. Allocated memory is still 125.8 MB. Free memory was 81.8 MB in the beginning and 91.8 MB in the end (delta: -10.0 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 58.29 ms. Allocated memory is still 125.8 MB. Free memory was 91.8 MB in the beginning and 89.7 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 31.16 ms. Allocated memory is still 125.8 MB. Free memory was 89.7 MB in the beginning and 88.1 MB in the end (delta: 1.6 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 670.44 ms. Allocated memory is still 125.8 MB. Free memory was 88.1 MB in the beginning and 65.8 MB in the end (delta: 22.3 MB). Peak memory consumption was 23.1 MB. Max. memory is 16.1 GB. * TraceAbstraction took 9490.61 ms. Allocated memory was 125.8 MB in the beginning and 157.3 MB in the end (delta: 31.5 MB). Free memory was 65.4 MB in the beginning and 48.2 MB in the end (delta: 17.3 MB). Peak memory consumption was 50.8 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. [2021-10-13 08:16:31,444 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d741eefd-52c0-40a6-978a-2e20a377e48b/bin/utaipan-q2qaUkNPG8/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-4e77c04 [2021-10-13 08:16:33,840 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-13 08:16:33,844 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-13 08:16:33,899 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-13 08:16:33,900 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-13 08:16:33,904 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-13 08:16:33,906 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-13 08:16:33,911 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-13 08:16:33,914 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-13 08:16:33,925 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-13 08:16:33,926 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-13 08:16:33,928 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-13 08:16:33,929 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-13 08:16:33,932 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-13 08:16:33,934 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-13 08:16:33,940 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-13 08:16:33,942 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-13 08:16:33,943 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-13 08:16:33,945 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-13 08:16:33,954 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-13 08:16:33,956 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-13 08:16:33,958 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-13 08:16:33,961 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-13 08:16:33,963 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-13 08:16:33,972 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-13 08:16:33,973 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-13 08:16:33,973 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-13 08:16:33,975 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-13 08:16:33,976 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-13 08:16:33,977 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-13 08:16:33,977 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-13 08:16:33,978 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-13 08:16:33,980 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-13 08:16:33,981 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-13 08:16:33,982 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-13 08:16:33,983 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-13 08:16:33,984 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-13 08:16:33,984 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-13 08:16:33,984 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-13 08:16:33,986 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-13 08:16:33,987 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-13 08:16:33,992 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d741eefd-52c0-40a6-978a-2e20a377e48b/bin/utaipan-q2qaUkNPG8/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf [2021-10-13 08:16:34,045 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-13 08:16:34,046 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-13 08:16:34,047 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-13 08:16:34,047 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-13 08:16:34,047 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-13 08:16:34,048 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-13 08:16:34,048 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-13 08:16:34,048 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-13 08:16:34,048 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-13 08:16:34,050 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-13 08:16:34,051 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-13 08:16:34,051 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-13 08:16:34,051 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-13 08:16:34,051 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-10-13 08:16:34,052 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-13 08:16:34,052 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-13 08:16:34,052 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-13 08:16:34,052 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-10-13 08:16:34,052 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-10-13 08:16:34,053 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-10-13 08:16:34,053 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-13 08:16:34,053 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-13 08:16:34,053 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-10-13 08:16:34,053 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-10-13 08:16:34,054 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-13 08:16:34,054 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-13 08:16:34,054 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-13 08:16:34,054 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-13 08:16:34,054 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-13 08:16:34,055 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 08:16:34,055 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-13 08:16:34,055 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-13 08:16:34,056 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-10-13 08:16:34,056 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-10-13 08:16:34,056 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-13 08:16:34,056 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-13 08:16:34,056 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_d741eefd-52c0-40a6-978a-2e20a377e48b/bin/utaipan-q2qaUkNPG8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d741eefd-52c0-40a6-978a-2e20a377e48b/bin/utaipan-q2qaUkNPG8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 61aa671d60c63a9c0aa1f89d5d2982cadbc06881 [2021-10-13 08:16:34,465 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-13 08:16:34,489 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-13 08:16:34,492 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-13 08:16:34,493 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-13 08:16:34,494 INFO L275 PluginConnector]: CDTParser initialized [2021-10-13 08:16:34,495 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d741eefd-52c0-40a6-978a-2e20a377e48b/bin/utaipan-q2qaUkNPG8/../../sv-benchmarks/c/heap-manipulation/dancing.i [2021-10-13 08:16:34,566 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d741eefd-52c0-40a6-978a-2e20a377e48b/bin/utaipan-q2qaUkNPG8/data/d33a91ab7/3f58a42ce560476fabfea645c27d9458/FLAGe5cf39366 [2021-10-13 08:16:35,106 INFO L306 CDTParser]: Found 1 translation units. [2021-10-13 08:16:35,107 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d741eefd-52c0-40a6-978a-2e20a377e48b/sv-benchmarks/c/heap-manipulation/dancing.i [2021-10-13 08:16:35,129 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d741eefd-52c0-40a6-978a-2e20a377e48b/bin/utaipan-q2qaUkNPG8/data/d33a91ab7/3f58a42ce560476fabfea645c27d9458/FLAGe5cf39366 [2021-10-13 08:16:35,425 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d741eefd-52c0-40a6-978a-2e20a377e48b/bin/utaipan-q2qaUkNPG8/data/d33a91ab7/3f58a42ce560476fabfea645c27d9458 [2021-10-13 08:16:35,428 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-13 08:16:35,430 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-13 08:16:35,432 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-13 08:16:35,432 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-13 08:16:35,436 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-13 08:16:35,437 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 08:16:35" (1/1) ... [2021-10-13 08:16:35,438 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@54990e65 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:16:35, skipping insertion in model container [2021-10-13 08:16:35,439 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 08:16:35" (1/1) ... [2021-10-13 08:16:35,446 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-13 08:16:35,509 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-13 08:16:35,726 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_d741eefd-52c0-40a6-978a-2e20a377e48b/sv-benchmarks/c/heap-manipulation/dancing.i[938,951] [2021-10-13 08:16:35,878 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 08:16:35,891 INFO L203 MainTranslator]: Completed pre-run [2021-10-13 08:16:35,904 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_d741eefd-52c0-40a6-978a-2e20a377e48b/sv-benchmarks/c/heap-manipulation/dancing.i[938,951] [2021-10-13 08:16:35,935 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 08:16:35,968 INFO L208 MainTranslator]: Completed translation [2021-10-13 08:16:35,968 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:16:35 WrapperNode [2021-10-13 08:16:35,968 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-13 08:16:35,970 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-13 08:16:35,970 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-13 08:16:35,970 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-13 08:16:35,977 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:16:35" (1/1) ... [2021-10-13 08:16:35,995 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:16:35" (1/1) ... [2021-10-13 08:16:36,030 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-13 08:16:36,034 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-13 08:16:36,034 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-13 08:16:36,034 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-13 08:16:36,043 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:16:35" (1/1) ... [2021-10-13 08:16:36,043 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:16:35" (1/1) ... [2021-10-13 08:16:36,066 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:16:35" (1/1) ... [2021-10-13 08:16:36,066 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:16:35" (1/1) ... [2021-10-13 08:16:36,079 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:16:35" (1/1) ... [2021-10-13 08:16:36,084 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:16:35" (1/1) ... [2021-10-13 08:16:36,086 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:16:35" (1/1) ... [2021-10-13 08:16:36,090 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-13 08:16:36,091 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-13 08:16:36,091 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-13 08:16:36,091 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-13 08:16:36,092 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:16:35" (1/1) ... [2021-10-13 08:16:36,099 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 08:16:36,111 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d741eefd-52c0-40a6-978a-2e20a377e48b/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 08:16:36,123 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d741eefd-52c0-40a6-978a-2e20a377e48b/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-13 08:16:36,146 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d741eefd-52c0-40a6-978a-2e20a377e48b/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-13 08:16:36,170 INFO L130 BoogieDeclarations]: Found specification of procedure is_list_containing_x [2021-10-13 08:16:36,171 INFO L138 BoogieDeclarations]: Found implementation of procedure is_list_containing_x [2021-10-13 08:16:36,171 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-10-13 08:16:36,171 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-10-13 08:16:36,171 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-13 08:16:36,171 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-10-13 08:16:36,171 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-13 08:16:36,172 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-10-13 08:16:36,172 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-13 08:16:36,172 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-13 08:16:36,882 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-13 08:16:36,882 INFO L299 CfgBuilder]: Removed 15 assume(true) statements. [2021-10-13 08:16:36,884 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 08:16:36 BoogieIcfgContainer [2021-10-13 08:16:36,887 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-13 08:16:36,889 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-13 08:16:36,889 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-13 08:16:36,892 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-13 08:16:36,892 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 08:16:35" (1/3) ... [2021-10-13 08:16:36,893 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@fc14e4b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 08:16:36, skipping insertion in model container [2021-10-13 08:16:36,894 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:16:35" (2/3) ... [2021-10-13 08:16:36,894 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@fc14e4b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 08:16:36, skipping insertion in model container [2021-10-13 08:16:36,894 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 08:16:36" (3/3) ... [2021-10-13 08:16:36,896 INFO L111 eAbstractionObserver]: Analyzing ICFG dancing.i [2021-10-13 08:16:36,901 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-13 08:16:36,901 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 45 error locations. [2021-10-13 08:16:36,960 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-13 08:16:36,971 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 [2021-10-13 08:16:36,971 INFO L340 AbstractCegarLoop]: Starting to check reachability of 45 error locations. [2021-10-13 08:16:36,991 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) [2021-10-13 08:16:37,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2021-10-13 08:16:37,011 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 08:16:37,011 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1] [2021-10-13 08:16:37,012 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 41 more)] === [2021-10-13 08:16:37,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 08:16:37,018 INFO L82 PathProgramCache]: Analyzing trace with hash 29857, now seen corresponding path program 1 times [2021-10-13 08:16:37,030 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 08:16:37,031 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1901805692] [2021-10-13 08:16:37,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:16:37,032 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 08:16:37,032 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d741eefd-52c0-40a6-978a-2e20a377e48b/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 08:16:37,037 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d741eefd-52c0-40a6-978a-2e20a377e48b/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 08:16:37,084 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d741eefd-52c0-40a6-978a-2e20a377e48b/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-10-13 08:16:37,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:16:37,150 INFO L263 TraceCheckSpWp]: Trace formula consists of 26 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-13 08:16:37,154 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:16:37,232 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 [2021-10-13 08:16:37,253 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:16:37,253 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 08:16:37,278 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:16:37,279 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 08:16:37,280 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1901805692] [2021-10-13 08:16:37,280 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1901805692] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 08:16:37,281 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 08:16:37,281 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-10-13 08:16:37,284 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [970927600] [2021-10-13 08:16:37,290 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-13 08:16:37,292 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 08:16:37,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-13 08:16:37,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 08:16:37,314 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) [2021-10-13 08:16:37,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 08:16:37,606 INFO L93 Difference]: Finished difference Result 105 states and 117 transitions. [2021-10-13 08:16:37,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-13 08:16:37,608 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 [2021-10-13 08:16:37,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 08:16:37,615 INFO L225 Difference]: With dead ends: 105 [2021-10-13 08:16:37,615 INFO L226 Difference]: Without dead ends: 103 [2021-10-13 08:16:37,617 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 16.9ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 08:16:37,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2021-10-13 08:16:37,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 103. [2021-10-13 08:16:37,662 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) [2021-10-13 08:16:37,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 115 transitions. [2021-10-13 08:16:37,666 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 115 transitions. Word has length 3 [2021-10-13 08:16:37,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 08:16:37,666 INFO L470 AbstractCegarLoop]: Abstraction has 103 states and 115 transitions. [2021-10-13 08:16:37,666 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) [2021-10-13 08:16:37,667 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 115 transitions. [2021-10-13 08:16:37,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2021-10-13 08:16:37,667 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 08:16:37,667 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1] [2021-10-13 08:16:37,683 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d741eefd-52c0-40a6-978a-2e20a377e48b/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-10-13 08:16:37,879 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d741eefd-52c0-40a6-978a-2e20a377e48b/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 08:16:37,880 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 41 more)] === [2021-10-13 08:16:37,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 08:16:37,881 INFO L82 PathProgramCache]: Analyzing trace with hash 29858, now seen corresponding path program 1 times [2021-10-13 08:16:37,881 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 08:16:37,881 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1297223493] [2021-10-13 08:16:37,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:16:37,882 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 08:16:37,882 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d741eefd-52c0-40a6-978a-2e20a377e48b/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 08:16:37,883 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d741eefd-52c0-40a6-978a-2e20a377e48b/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 08:16:37,889 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d741eefd-52c0-40a6-978a-2e20a377e48b/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-10-13 08:16:37,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:16:37,962 INFO L263 TraceCheckSpWp]: Trace formula consists of 26 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-13 08:16:37,963 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:16:37,976 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 [2021-10-13 08:16:37,992 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:16:37,992 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 08:16:38,048 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:16:38,049 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 08:16:38,049 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1297223493] [2021-10-13 08:16:38,049 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1297223493] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 08:16:38,049 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 08:16:38,049 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 3 [2021-10-13 08:16:38,050 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [967543349] [2021-10-13 08:16:38,051 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-13 08:16:38,051 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 08:16:38,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-13 08:16:38,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-13 08:16:38,052 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) [2021-10-13 08:16:38,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 08:16:38,388 INFO L93 Difference]: Finished difference Result 101 states and 113 transitions. [2021-10-13 08:16:38,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-13 08:16:38,389 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 [2021-10-13 08:16:38,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 08:16:38,390 INFO L225 Difference]: With dead ends: 101 [2021-10-13 08:16:38,391 INFO L226 Difference]: Without dead ends: 101 [2021-10-13 08:16:38,391 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 30.1ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-13 08:16:38,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2021-10-13 08:16:38,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 101. [2021-10-13 08:16:38,400 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) [2021-10-13 08:16:38,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 113 transitions. [2021-10-13 08:16:38,402 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 113 transitions. Word has length 3 [2021-10-13 08:16:38,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 08:16:38,402 INFO L470 AbstractCegarLoop]: Abstraction has 101 states and 113 transitions. [2021-10-13 08:16:38,403 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) [2021-10-13 08:16:38,403 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 113 transitions. [2021-10-13 08:16:38,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-10-13 08:16:38,404 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 08:16:38,404 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 08:16:38,420 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d741eefd-52c0-40a6-978a-2e20a377e48b/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-10-13 08:16:38,614 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d741eefd-52c0-40a6-978a-2e20a377e48b/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 08:16:38,615 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 41 more)] === [2021-10-13 08:16:38,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 08:16:38,616 INFO L82 PathProgramCache]: Analyzing trace with hash 59267633, now seen corresponding path program 1 times [2021-10-13 08:16:38,617 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 08:16:38,617 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [350246657] [2021-10-13 08:16:38,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:16:38,618 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 08:16:38,618 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d741eefd-52c0-40a6-978a-2e20a377e48b/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 08:16:38,619 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d741eefd-52c0-40a6-978a-2e20a377e48b/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 08:16:38,646 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d741eefd-52c0-40a6-978a-2e20a377e48b/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-10-13 08:16:38,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:16:38,727 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-13 08:16:38,728 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:16:38,755 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 [2021-10-13 08:16:38,775 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:16:38,776 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 08:16:38,828 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:16:38,828 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 08:16:38,829 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [350246657] [2021-10-13 08:16:38,829 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [350246657] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 08:16:38,829 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 08:16:38,829 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-10-13 08:16:38,830 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [995885631] [2021-10-13 08:16:38,830 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-13 08:16:38,830 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 08:16:38,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-13 08:16:38,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 08:16:38,832 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) [2021-10-13 08:16:39,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 08:16:39,228 INFO L93 Difference]: Finished difference Result 169 states and 190 transitions. [2021-10-13 08:16:39,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-13 08:16:39,229 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 [2021-10-13 08:16:39,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 08:16:39,231 INFO L225 Difference]: With dead ends: 169 [2021-10-13 08:16:39,232 INFO L226 Difference]: Without dead ends: 169 [2021-10-13 08:16:39,232 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.3ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 08:16:39,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2021-10-13 08:16:39,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 99. [2021-10-13 08:16:39,247 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) [2021-10-13 08:16:39,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 111 transitions. [2021-10-13 08:16:39,249 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 111 transitions. Word has length 8 [2021-10-13 08:16:39,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 08:16:39,249 INFO L470 AbstractCegarLoop]: Abstraction has 99 states and 111 transitions. [2021-10-13 08:16:39,249 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) [2021-10-13 08:16:39,250 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 111 transitions. [2021-10-13 08:16:39,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-10-13 08:16:39,250 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 08:16:39,250 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 08:16:39,265 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d741eefd-52c0-40a6-978a-2e20a377e48b/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-10-13 08:16:39,463 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d741eefd-52c0-40a6-978a-2e20a377e48b/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 08:16:39,464 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 41 more)] === [2021-10-13 08:16:39,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 08:16:39,465 INFO L82 PathProgramCache]: Analyzing trace with hash 59267634, now seen corresponding path program 1 times [2021-10-13 08:16:39,465 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 08:16:39,465 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1000320101] [2021-10-13 08:16:39,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:16:39,466 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 08:16:39,466 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d741eefd-52c0-40a6-978a-2e20a377e48b/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 08:16:39,467 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d741eefd-52c0-40a6-978a-2e20a377e48b/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 08:16:39,469 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d741eefd-52c0-40a6-978a-2e20a377e48b/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-10-13 08:16:39,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:16:39,529 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-13 08:16:39,530 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:16:39,552 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 [2021-10-13 08:16:39,575 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:16:39,575 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 08:16:39,643 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:16:39,644 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 08:16:39,644 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1000320101] [2021-10-13 08:16:39,644 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1000320101] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 08:16:39,644 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 08:16:39,645 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 3 [2021-10-13 08:16:39,645 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [843690707] [2021-10-13 08:16:39,645 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-13 08:16:39,646 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 08:16:39,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-13 08:16:39,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-13 08:16:39,647 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) [2021-10-13 08:16:40,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 08:16:40,238 INFO L93 Difference]: Finished difference Result 169 states and 189 transitions. [2021-10-13 08:16:40,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-13 08:16:40,240 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 [2021-10-13 08:16:40,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 08:16:40,247 INFO L225 Difference]: With dead ends: 169 [2021-10-13 08:16:40,247 INFO L226 Difference]: Without dead ends: 169 [2021-10-13 08:16:40,247 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 26.0ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-13 08:16:40,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2021-10-13 08:16:40,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 97. [2021-10-13 08:16:40,258 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) [2021-10-13 08:16:40,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 109 transitions. [2021-10-13 08:16:40,260 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 109 transitions. Word has length 8 [2021-10-13 08:16:40,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 08:16:40,260 INFO L470 AbstractCegarLoop]: Abstraction has 97 states and 109 transitions. [2021-10-13 08:16:40,261 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) [2021-10-13 08:16:40,261 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 109 transitions. [2021-10-13 08:16:40,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-10-13 08:16:40,262 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 08:16:40,262 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 08:16:40,278 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d741eefd-52c0-40a6-978a-2e20a377e48b/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-10-13 08:16:40,474 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d741eefd-52c0-40a6-978a-2e20a377e48b/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 08:16:40,475 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)] === [2021-10-13 08:16:40,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 08:16:40,475 INFO L82 PathProgramCache]: Analyzing trace with hash 1124495229, now seen corresponding path program 1 times [2021-10-13 08:16:40,476 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 08:16:40,476 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [118392474] [2021-10-13 08:16:40,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:16:40,477 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 08:16:40,477 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d741eefd-52c0-40a6-978a-2e20a377e48b/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 08:16:40,477 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d741eefd-52c0-40a6-978a-2e20a377e48b/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 08:16:40,479 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d741eefd-52c0-40a6-978a-2e20a377e48b/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-10-13 08:16:40,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:16:40,562 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 12 conjunts are in the unsatisfiable core [2021-10-13 08:16:40,563 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:16:40,737 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:16:40,737 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 08:16:40,843 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:16:40,843 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 08:16:40,843 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [118392474] [2021-10-13 08:16:40,843 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [118392474] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 08:16:40,843 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 08:16:40,844 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 5] imperfect sequences [] total 9 [2021-10-13 08:16:40,844 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [56447487] [2021-10-13 08:16:40,844 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-13 08:16:40,844 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 08:16:40,845 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-13 08:16:40,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-10-13 08:16:40,845 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) [2021-10-13 08:16:41,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 08:16:41,079 INFO L93 Difference]: Finished difference Result 180 states and 205 transitions. [2021-10-13 08:16:41,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-13 08:16:41,079 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 [2021-10-13 08:16:41,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 08:16:41,082 INFO L225 Difference]: With dead ends: 180 [2021-10-13 08:16:41,082 INFO L226 Difference]: Without dead ends: 180 [2021-10-13 08:16:41,083 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 99.8ms TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-10-13 08:16:41,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2021-10-13 08:16:41,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 141. [2021-10-13 08:16:41,094 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) [2021-10-13 08:16:41,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 194 transitions. [2021-10-13 08:16:41,096 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 194 transitions. Word has length 10 [2021-10-13 08:16:41,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 08:16:41,096 INFO L470 AbstractCegarLoop]: Abstraction has 141 states and 194 transitions. [2021-10-13 08:16:41,097 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) [2021-10-13 08:16:41,097 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 194 transitions. [2021-10-13 08:16:41,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-10-13 08:16:41,097 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 08:16:41,097 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 08:16:41,113 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d741eefd-52c0-40a6-978a-2e20a377e48b/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-10-13 08:16:41,308 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d741eefd-52c0-40a6-978a-2e20a377e48b/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 08:16:41,309 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 41 more)] === [2021-10-13 08:16:41,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 08:16:41,310 INFO L82 PathProgramCache]: Analyzing trace with hash 1121620373, now seen corresponding path program 1 times [2021-10-13 08:16:41,310 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 08:16:41,310 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [333288013] [2021-10-13 08:16:41,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:16:41,311 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 08:16:41,312 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d741eefd-52c0-40a6-978a-2e20a377e48b/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 08:16:41,313 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d741eefd-52c0-40a6-978a-2e20a377e48b/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 08:16:41,352 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d741eefd-52c0-40a6-978a-2e20a377e48b/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-10-13 08:16:41,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:16:41,420 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-13 08:16:41,422 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:16:41,445 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 [2021-10-13 08:16:41,522 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-10-13 08:16:41,523 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 [2021-10-13 08:16:41,588 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:16:41,588 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 08:16:41,945 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:16:41,945 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 08:16:41,945 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [333288013] [2021-10-13 08:16:41,945 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [333288013] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 08:16:41,946 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 08:16:41,946 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 4] imperfect sequences [] total 6 [2021-10-13 08:16:41,946 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [25892439] [2021-10-13 08:16:41,946 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-13 08:16:41,946 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 08:16:41,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-13 08:16:41,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-10-13 08:16:41,947 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) [2021-10-13 08:16:42,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 08:16:42,394 INFO L93 Difference]: Finished difference Result 140 states and 192 transitions. [2021-10-13 08:16:42,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-13 08:16:42,396 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 [2021-10-13 08:16:42,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 08:16:42,397 INFO L225 Difference]: With dead ends: 140 [2021-10-13 08:16:42,397 INFO L226 Difference]: Without dead ends: 140 [2021-10-13 08:16:42,397 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 212.7ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-10-13 08:16:42,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2021-10-13 08:16:42,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 140. [2021-10-13 08:16:42,405 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) [2021-10-13 08:16:42,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 192 transitions. [2021-10-13 08:16:42,407 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 192 transitions. Word has length 10 [2021-10-13 08:16:42,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 08:16:42,407 INFO L470 AbstractCegarLoop]: Abstraction has 140 states and 192 transitions. [2021-10-13 08:16:42,408 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) [2021-10-13 08:16:42,408 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 192 transitions. [2021-10-13 08:16:42,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-10-13 08:16:42,408 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 08:16:42,409 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 08:16:42,423 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d741eefd-52c0-40a6-978a-2e20a377e48b/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-10-13 08:16:42,623 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d741eefd-52c0-40a6-978a-2e20a377e48b/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 08:16:42,623 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 41 more)] === [2021-10-13 08:16:42,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 08:16:42,623 INFO L82 PathProgramCache]: Analyzing trace with hash 1121620372, now seen corresponding path program 1 times [2021-10-13 08:16:42,624 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 08:16:42,624 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [148102036] [2021-10-13 08:16:42,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:16:42,624 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 08:16:42,624 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d741eefd-52c0-40a6-978a-2e20a377e48b/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 08:16:42,626 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d741eefd-52c0-40a6-978a-2e20a377e48b/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 08:16:42,632 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d741eefd-52c0-40a6-978a-2e20a377e48b/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-10-13 08:16:42,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:16:42,735 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-13 08:16:42,736 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:16:42,747 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 [2021-10-13 08:16:42,799 INFO L354 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2021-10-13 08:16:42,800 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 [2021-10-13 08:16:42,842 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:16:42,842 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 08:16:42,907 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:16:42,908 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 08:16:42,908 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [148102036] [2021-10-13 08:16:42,908 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [148102036] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 08:16:42,908 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 08:16:42,909 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-10-13 08:16:42,909 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [635887641] [2021-10-13 08:16:42,909 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-13 08:16:42,910 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 08:16:42,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-13 08:16:42,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-13 08:16:42,911 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) [2021-10-13 08:16:43,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 08:16:43,130 INFO L93 Difference]: Finished difference Result 139 states and 190 transitions. [2021-10-13 08:16:43,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-13 08:16:43,130 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 [2021-10-13 08:16:43,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 08:16:43,132 INFO L225 Difference]: With dead ends: 139 [2021-10-13 08:16:43,132 INFO L226 Difference]: Without dead ends: 139 [2021-10-13 08:16:43,132 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 8 SyntacticMatches, 8 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 52.9ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-13 08:16:43,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2021-10-13 08:16:43,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 139. [2021-10-13 08:16:43,139 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) [2021-10-13 08:16:43,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 190 transitions. [2021-10-13 08:16:43,141 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 190 transitions. Word has length 10 [2021-10-13 08:16:43,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 08:16:43,141 INFO L470 AbstractCegarLoop]: Abstraction has 139 states and 190 transitions. [2021-10-13 08:16:43,141 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) [2021-10-13 08:16:43,141 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 190 transitions. [2021-10-13 08:16:43,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-10-13 08:16:43,142 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 08:16:43,142 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 08:16:43,154 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d741eefd-52c0-40a6-978a-2e20a377e48b/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-10-13 08:16:43,354 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d741eefd-52c0-40a6-978a-2e20a377e48b/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 08:16:43,354 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 41 more)] === [2021-10-13 08:16:43,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 08:16:43,354 INFO L82 PathProgramCache]: Analyzing trace with hash -676042672, now seen corresponding path program 1 times [2021-10-13 08:16:43,355 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 08:16:43,355 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1757241327] [2021-10-13 08:16:43,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:16:43,355 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 08:16:43,356 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d741eefd-52c0-40a6-978a-2e20a377e48b/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 08:16:43,356 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d741eefd-52c0-40a6-978a-2e20a377e48b/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 08:16:43,359 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d741eefd-52c0-40a6-978a-2e20a377e48b/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-10-13 08:16:43,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:16:43,465 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-13 08:16:43,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:16:43,474 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 [2021-10-13 08:16:43,595 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:16:43,596 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 08:16:43,672 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:16:43,673 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 08:16:43,673 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1757241327] [2021-10-13 08:16:43,673 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1757241327] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 08:16:43,673 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 08:16:43,674 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 5 [2021-10-13 08:16:43,674 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [623081027] [2021-10-13 08:16:43,674 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-13 08:16:43,674 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 08:16:43,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-13 08:16:43,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-10-13 08:16:43,675 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) [2021-10-13 08:16:44,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 08:16:44,186 INFO L93 Difference]: Finished difference Result 163 states and 185 transitions. [2021-10-13 08:16:44,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-13 08:16:44,186 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 [2021-10-13 08:16:44,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 08:16:44,187 INFO L225 Difference]: With dead ends: 163 [2021-10-13 08:16:44,187 INFO L226 Difference]: Without dead ends: 163 [2021-10-13 08:16:44,188 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 8 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 89.4ms TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-10-13 08:16:44,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2021-10-13 08:16:44,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 134. [2021-10-13 08:16:44,192 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) [2021-10-13 08:16:44,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 179 transitions. [2021-10-13 08:16:44,193 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 179 transitions. Word has length 15 [2021-10-13 08:16:44,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 08:16:44,194 INFO L470 AbstractCegarLoop]: Abstraction has 134 states and 179 transitions. [2021-10-13 08:16:44,194 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) [2021-10-13 08:16:44,194 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 179 transitions. [2021-10-13 08:16:44,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-10-13 08:16:44,195 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 08:16:44,195 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 08:16:44,210 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d741eefd-52c0-40a6-978a-2e20a377e48b/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-10-13 08:16:44,405 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d741eefd-52c0-40a6-978a-2e20a377e48b/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 08:16:44,406 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 41 more)] === [2021-10-13 08:16:44,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 08:16:44,406 INFO L82 PathProgramCache]: Analyzing trace with hash -676042671, now seen corresponding path program 1 times [2021-10-13 08:16:44,406 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 08:16:44,406 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1740522790] [2021-10-13 08:16:44,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:16:44,406 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 08:16:44,407 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d741eefd-52c0-40a6-978a-2e20a377e48b/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 08:16:44,407 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d741eefd-52c0-40a6-978a-2e20a377e48b/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 08:16:44,409 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d741eefd-52c0-40a6-978a-2e20a377e48b/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-10-13 08:16:44,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:16:44,520 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-13 08:16:44,522 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:16:44,534 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 [2021-10-13 08:16:44,694 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:16:44,694 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 08:16:44,981 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:16:44,982 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 08:16:44,982 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1740522790] [2021-10-13 08:16:44,982 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1740522790] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 08:16:44,982 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 08:16:44,982 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 8 [2021-10-13 08:16:44,982 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1597338465] [2021-10-13 08:16:44,983 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-13 08:16:44,983 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 08:16:44,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-13 08:16:44,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-10-13 08:16:44,984 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) [2021-10-13 08:16:46,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 08:16:46,074 INFO L93 Difference]: Finished difference Result 157 states and 178 transitions. [2021-10-13 08:16:46,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-13 08:16:46,075 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 [2021-10-13 08:16:46,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 08:16:46,076 INFO L225 Difference]: With dead ends: 157 [2021-10-13 08:16:46,076 INFO L226 Difference]: Without dead ends: 157 [2021-10-13 08:16:46,076 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 294.1ms TimeCoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2021-10-13 08:16:46,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2021-10-13 08:16:46,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 132. [2021-10-13 08:16:46,080 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) [2021-10-13 08:16:46,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 171 transitions. [2021-10-13 08:16:46,081 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 171 transitions. Word has length 15 [2021-10-13 08:16:46,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 08:16:46,081 INFO L470 AbstractCegarLoop]: Abstraction has 132 states and 171 transitions. [2021-10-13 08:16:46,082 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) [2021-10-13 08:16:46,082 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 171 transitions. [2021-10-13 08:16:46,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-10-13 08:16:46,083 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 08:16:46,083 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 08:16:46,098 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d741eefd-52c0-40a6-978a-2e20a377e48b/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-10-13 08:16:46,294 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d741eefd-52c0-40a6-978a-2e20a377e48b/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 08:16:46,295 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)] === [2021-10-13 08:16:46,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 08:16:46,295 INFO L82 PathProgramCache]: Analyzing trace with hash 1007406096, now seen corresponding path program 1 times [2021-10-13 08:16:46,295 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 08:16:46,295 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [518017655] [2021-10-13 08:16:46,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:16:46,295 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 08:16:46,296 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d741eefd-52c0-40a6-978a-2e20a377e48b/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 08:16:46,296 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d741eefd-52c0-40a6-978a-2e20a377e48b/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 08:16:46,301 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d741eefd-52c0-40a6-978a-2e20a377e48b/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-10-13 08:16:46,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:16:46,419 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-13 08:16:46,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:16:46,500 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:16:46,500 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 08:16:46,577 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-10-13 08:16:46,577 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 [2021-10-13 08:16:46,609 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:16:46,609 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 08:16:46,609 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [518017655] [2021-10-13 08:16:46,609 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [518017655] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 08:16:46,609 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1214285819] [2021-10-13 08:16:46,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:16:46,610 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-13 08:16:46,610 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d741eefd-52c0-40a6-978a-2e20a377e48b/bin/utaipan-q2qaUkNPG8/cvc4 [2021-10-13 08:16:46,616 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d741eefd-52c0-40a6-978a-2e20a377e48b/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-13 08:16:46,643 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d741eefd-52c0-40a6-978a-2e20a377e48b/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (12)] Waiting until timeout for monitored process [2021-10-13 08:16:46,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:16:46,851 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-13 08:16:46,853 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:16:46,867 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 [2021-10-13 08:16:46,920 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:16:46,920 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 08:16:46,976 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-10-13 08:16:46,976 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 [2021-10-13 08:16:47,000 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:16:47,000 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1214285819] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 08:16:47,000 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1542055739] [2021-10-13 08:16:47,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:16:47,001 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 08:16:47,001 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d741eefd-52c0-40a6-978a-2e20a377e48b/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 08:16:47,002 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d741eefd-52c0-40a6-978a-2e20a377e48b/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 08:16:47,026 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d741eefd-52c0-40a6-978a-2e20a377e48b/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-10-13 08:16:47,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:16:47,177 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-13 08:16:47,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:16:47,236 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:16:47,236 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 08:16:47,305 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-10-13 08:16:47,305 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 [2021-10-13 08:16:47,330 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:16:47,330 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1542055739] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 08:16:47,331 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-13 08:16:47,331 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5, 5] total 5 [2021-10-13 08:16:47,331 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [105991267] [2021-10-13 08:16:47,332 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-13 08:16:47,332 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 08:16:47,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-13 08:16:47,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-10-13 08:16:47,333 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) [2021-10-13 08:16:47,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 08:16:47,799 INFO L93 Difference]: Finished difference Result 144 states and 186 transitions. [2021-10-13 08:16:47,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-13 08:16:47,799 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 [2021-10-13 08:16:47,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 08:16:47,801 INFO L225 Difference]: With dead ends: 144 [2021-10-13 08:16:47,801 INFO L226 Difference]: Without dead ends: 144 [2021-10-13 08:16:47,801 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 77 SyntacticMatches, 9 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 86.6ms TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-10-13 08:16:47,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2021-10-13 08:16:47,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 140. [2021-10-13 08:16:47,806 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) [2021-10-13 08:16:47,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 183 transitions. [2021-10-13 08:16:47,808 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 183 transitions. Word has length 16 [2021-10-13 08:16:47,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 08:16:47,808 INFO L470 AbstractCegarLoop]: Abstraction has 140 states and 183 transitions. [2021-10-13 08:16:47,809 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) [2021-10-13 08:16:47,809 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 183 transitions. [2021-10-13 08:16:47,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-10-13 08:16:47,813 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 08:16:47,813 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 08:16:47,819 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d741eefd-52c0-40a6-978a-2e20a377e48b/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (12)] Forceful destruction successful, exit code 0 [2021-10-13 08:16:48,053 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d741eefd-52c0-40a6-978a-2e20a377e48b/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-10-13 08:16:48,222 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d741eefd-52c0-40a6-978a-2e20a377e48b/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-10-13 08:16:48,415 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d741eefd-52c0-40a6-978a-2e20a377e48b/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d741eefd-52c0-40a6-978a-2e20a377e48b/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d741eefd-52c0-40a6-978a-2e20a377e48b/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 08:16:48,415 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)] === [2021-10-13 08:16:48,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 08:16:48,416 INFO L82 PathProgramCache]: Analyzing trace with hash 1007406097, now seen corresponding path program 1 times [2021-10-13 08:16:48,416 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 08:16:48,416 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1491007938] [2021-10-13 08:16:48,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:16:48,416 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 08:16:48,417 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d741eefd-52c0-40a6-978a-2e20a377e48b/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 08:16:48,417 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d741eefd-52c0-40a6-978a-2e20a377e48b/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 08:16:48,418 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d741eefd-52c0-40a6-978a-2e20a377e48b/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-10-13 08:16:48,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:16:48,566 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-13 08:16:48,568 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:16:48,752 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:16:48,752 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 08:16:49,008 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 08:16:49,009 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 [2021-10-13 08:16:49,354 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:16:49,355 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 08:16:49,355 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1491007938] [2021-10-13 08:16:49,355 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1491007938] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 08:16:49,355 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1238952027] [2021-10-13 08:16:49,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:16:49,355 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-13 08:16:49,356 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d741eefd-52c0-40a6-978a-2e20a377e48b/bin/utaipan-q2qaUkNPG8/cvc4 [2021-10-13 08:16:49,357 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d741eefd-52c0-40a6-978a-2e20a377e48b/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-13 08:16:49,359 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d741eefd-52c0-40a6-978a-2e20a377e48b/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (15)] Waiting until timeout for monitored process [2021-10-13 08:16:49,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:16:49,611 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-13 08:16:49,612 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:16:49,750 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:16:49,750 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 08:16:49,861 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 08:16:49,862 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 [2021-10-13 08:16:50,074 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:16:50,075 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1238952027] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 08:16:50,075 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [986105141] [2021-10-13 08:16:50,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:16:50,075 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 08:16:50,075 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d741eefd-52c0-40a6-978a-2e20a377e48b/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 08:16:50,076 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d741eefd-52c0-40a6-978a-2e20a377e48b/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 08:16:50,102 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d741eefd-52c0-40a6-978a-2e20a377e48b/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-10-13 08:16:50,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:16:50,276 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-13 08:16:50,277 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:16:50,427 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:16:50,427 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 08:16:50,534 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 08:16:50,535 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 [2021-10-13 08:16:50,773 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:16:50,773 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [986105141] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 08:16:50,773 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-13 08:16:50,773 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6, 6, 6, 6] total 11 [2021-10-13 08:16:50,773 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1556864996] [2021-10-13 08:16:50,774 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-13 08:16:50,774 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 08:16:50,775 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-13 08:16:50,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-10-13 08:16:50,775 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) [2021-10-13 08:16:51,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 08:16:51,509 INFO L93 Difference]: Finished difference Result 141 states and 183 transitions. [2021-10-13 08:16:51,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-13 08:16:51,510 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 [2021-10-13 08:16:51,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 08:16:51,511 INFO L225 Difference]: With dead ends: 141 [2021-10-13 08:16:51,512 INFO L226 Difference]: Without dead ends: 141 [2021-10-13 08:16:51,512 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 78 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 354.9ms TimeCoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2021-10-13 08:16:51,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2021-10-13 08:16:51,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 139. [2021-10-13 08:16:51,517 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) [2021-10-13 08:16:51,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 180 transitions. [2021-10-13 08:16:51,519 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 180 transitions. Word has length 16 [2021-10-13 08:16:51,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 08:16:51,519 INFO L470 AbstractCegarLoop]: Abstraction has 139 states and 180 transitions. [2021-10-13 08:16:51,519 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) [2021-10-13 08:16:51,519 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 180 transitions. [2021-10-13 08:16:51,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-10-13 08:16:51,520 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 08:16:51,520 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 08:16:51,554 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d741eefd-52c0-40a6-978a-2e20a377e48b/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-10-13 08:16:51,746 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d741eefd-52c0-40a6-978a-2e20a377e48b/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-10-13 08:16:51,941 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d741eefd-52c0-40a6-978a-2e20a377e48b/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (15)] Forceful destruction successful, exit code 0 [2021-10-13 08:16:52,139 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d741eefd-52c0-40a6-978a-2e20a377e48b/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d741eefd-52c0-40a6-978a-2e20a377e48b/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d741eefd-52c0-40a6-978a-2e20a377e48b/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt [2021-10-13 08:16:52,139 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr16REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 41 more)] === [2021-10-13 08:16:52,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 08:16:52,140 INFO L82 PathProgramCache]: Analyzing trace with hash -1682703596, now seen corresponding path program 1 times [2021-10-13 08:16:52,140 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 08:16:52,140 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1194246219] [2021-10-13 08:16:52,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:16:52,140 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 08:16:52,140 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d741eefd-52c0-40a6-978a-2e20a377e48b/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 08:16:52,141 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d741eefd-52c0-40a6-978a-2e20a377e48b/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 08:16:52,144 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d741eefd-52c0-40a6-978a-2e20a377e48b/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-10-13 08:16:52,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:16:52,338 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-13 08:16:52,339 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:16:52,364 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 [2021-10-13 08:16:52,372 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 [2021-10-13 08:16:52,608 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 [2021-10-13 08:16:52,612 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 [2021-10-13 08:16:52,644 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:16:52,645 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 08:16:52,746 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:16:52,746 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 08:16:52,747 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1194246219] [2021-10-13 08:16:52,747 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1194246219] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 08:16:52,747 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 08:16:52,747 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 6] imperfect sequences [] total 7 [2021-10-13 08:16:52,747 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1923170808] [2021-10-13 08:16:52,748 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-13 08:16:52,748 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 08:16:52,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-13 08:16:52,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-10-13 08:16:52,749 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) [2021-10-13 08:17:07,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 08:17:07,383 INFO L93 Difference]: Finished difference Result 196 states and 244 transitions. [2021-10-13 08:17:07,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-13 08:17:07,384 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 [2021-10-13 08:17:07,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 08:17:07,385 INFO L225 Difference]: With dead ends: 196 [2021-10-13 08:17:07,386 INFO L226 Difference]: Without dead ends: 196 [2021-10-13 08:17:07,386 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 222.4ms TimeCoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2021-10-13 08:17:07,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2021-10-13 08:17:07,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 165. [2021-10-13 08:17:07,392 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) [2021-10-13 08:17:07,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 219 transitions. [2021-10-13 08:17:07,394 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 219 transitions. Word has length 19 [2021-10-13 08:17:07,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 08:17:07,394 INFO L470 AbstractCegarLoop]: Abstraction has 165 states and 219 transitions. [2021-10-13 08:17:07,394 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) [2021-10-13 08:17:07,395 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 219 transitions. [2021-10-13 08:17:07,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-10-13 08:17:07,396 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 08:17:07,396 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] [2021-10-13 08:17:07,414 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d741eefd-52c0-40a6-978a-2e20a377e48b/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-10-13 08:17:07,608 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d741eefd-52c0-40a6-978a-2e20a377e48b/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 08:17:07,608 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr24REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 41 more)] === [2021-10-13 08:17:07,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 08:17:07,608 INFO L82 PathProgramCache]: Analyzing trace with hash -1814435946, now seen corresponding path program 1 times [2021-10-13 08:17:07,609 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 08:17:07,609 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1728037772] [2021-10-13 08:17:07,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:17:07,609 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 08:17:07,610 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d741eefd-52c0-40a6-978a-2e20a377e48b/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 08:17:07,610 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d741eefd-52c0-40a6-978a-2e20a377e48b/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 08:17:07,611 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d741eefd-52c0-40a6-978a-2e20a377e48b/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-10-13 08:17:07,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:17:07,865 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 13 conjunts are in the unsatisfiable core [2021-10-13 08:17:07,867 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:17:07,878 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 [2021-10-13 08:17:07,885 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 [2021-10-13 08:17:07,926 INFO L354 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2021-10-13 08:17:07,926 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 [2021-10-13 08:17:07,941 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 08:17:07,943 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 [2021-10-13 08:17:08,426 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-10-13 08:17:08,427 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 47 treesize of output 33 [2021-10-13 08:17:08,432 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-10-13 08:17:08,433 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 [2021-10-13 08:17:08,471 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:17:08,471 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 08:17:08,666 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:17:08,666 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 08:17:08,667 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1728037772] [2021-10-13 08:17:08,667 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1728037772] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 08:17:08,667 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 08:17:08,667 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 6] imperfect sequences [] total 10 [2021-10-13 08:17:08,667 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1592397653] [2021-10-13 08:17:08,668 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-13 08:17:08,668 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 08:17:08,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-13 08:17:08,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-10-13 08:17:08,669 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) [2021-10-13 08:17:25,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 08:17:25,507 INFO L93 Difference]: Finished difference Result 191 states and 238 transitions. [2021-10-13 08:17:25,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-13 08:17:25,507 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 [2021-10-13 08:17:25,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 08:17:25,509 INFO L225 Difference]: With dead ends: 191 [2021-10-13 08:17:25,509 INFO L226 Difference]: Without dead ends: 191 [2021-10-13 08:17:25,510 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 437.8ms TimeCoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2021-10-13 08:17:25,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2021-10-13 08:17:25,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 165. [2021-10-13 08:17:25,516 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) [2021-10-13 08:17:25,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 218 transitions. [2021-10-13 08:17:25,518 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 218 transitions. Word has length 21 [2021-10-13 08:17:25,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 08:17:25,518 INFO L470 AbstractCegarLoop]: Abstraction has 165 states and 218 transitions. [2021-10-13 08:17:25,518 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) [2021-10-13 08:17:25,518 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 218 transitions. [2021-10-13 08:17:25,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-10-13 08:17:25,519 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 08:17:25,520 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] [2021-10-13 08:17:25,530 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d741eefd-52c0-40a6-978a-2e20a377e48b/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-10-13 08:17:25,727 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d741eefd-52c0-40a6-978a-2e20a377e48b/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 08:17:25,727 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 41 more)] === [2021-10-13 08:17:25,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 08:17:25,727 INFO L82 PathProgramCache]: Analyzing trace with hash -1300172899, now seen corresponding path program 1 times [2021-10-13 08:17:25,728 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 08:17:25,728 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2089694227] [2021-10-13 08:17:25,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:17:25,728 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 08:17:25,729 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d741eefd-52c0-40a6-978a-2e20a377e48b/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 08:17:25,729 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d741eefd-52c0-40a6-978a-2e20a377e48b/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 08:17:25,731 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d741eefd-52c0-40a6-978a-2e20a377e48b/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-10-13 08:17:25,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:17:25,965 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-13 08:17:25,967 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:17:25,974 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 [2021-10-13 08:17:26,014 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-13 08:17:26,014 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 [2021-10-13 08:17:26,117 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:17:26,117 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 08:17:26,284 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:17:26,285 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 08:17:26,285 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2089694227] [2021-10-13 08:17:26,285 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2089694227] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 08:17:26,285 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [276746783] [2021-10-13 08:17:26,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:17:26,285 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-13 08:17:26,285 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d741eefd-52c0-40a6-978a-2e20a377e48b/bin/utaipan-q2qaUkNPG8/cvc4 [2021-10-13 08:17:26,287 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d741eefd-52c0-40a6-978a-2e20a377e48b/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-13 08:17:26,306 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d741eefd-52c0-40a6-978a-2e20a377e48b/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (20)] Waiting until timeout for monitored process [2021-10-13 08:17:26,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:17:26,664 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-13 08:17:26,665 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:17:26,956 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:17:26,956 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 08:17:27,134 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:17:27,135 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [276746783] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 08:17:27,135 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2081013652] [2021-10-13 08:17:27,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:17:27,135 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 08:17:27,135 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d741eefd-52c0-40a6-978a-2e20a377e48b/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 08:17:27,136 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d741eefd-52c0-40a6-978a-2e20a377e48b/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 08:17:27,157 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d741eefd-52c0-40a6-978a-2e20a377e48b/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-10-13 08:17:27,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:17:27,418 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-13 08:17:27,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:17:27,428 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 [2021-10-13 08:17:27,465 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-13 08:17:27,466 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 [2021-10-13 08:17:27,529 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:17:27,529 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 08:17:27,673 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:17:27,673 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2081013652] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 08:17:27,674 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-13 08:17:27,674 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7, 7, 7, 7] total 12 [2021-10-13 08:17:27,674 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1376244199] [2021-10-13 08:17:27,674 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-13 08:17:27,675 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 08:17:27,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-13 08:17:27,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-10-13 08:17:27,675 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) [2021-10-13 08:17:29,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 08:17:29,715 INFO L93 Difference]: Finished difference Result 240 states and 286 transitions. [2021-10-13 08:17:29,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-13 08:17:29,716 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 [2021-10-13 08:17:29,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 08:17:29,718 INFO L225 Difference]: With dead ends: 240 [2021-10-13 08:17:29,718 INFO L226 Difference]: Without dead ends: 238 [2021-10-13 08:17:29,718 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 96 SyntacticMatches, 14 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 367.6ms TimeCoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-10-13 08:17:29,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2021-10-13 08:17:29,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 165. [2021-10-13 08:17:29,725 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) [2021-10-13 08:17:29,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 217 transitions. [2021-10-13 08:17:29,726 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 217 transitions. Word has length 21 [2021-10-13 08:17:29,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 08:17:29,727 INFO L470 AbstractCegarLoop]: Abstraction has 165 states and 217 transitions. [2021-10-13 08:17:29,727 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) [2021-10-13 08:17:29,727 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 217 transitions. [2021-10-13 08:17:29,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-10-13 08:17:29,728 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 08:17:29,728 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] [2021-10-13 08:17:29,744 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d741eefd-52c0-40a6-978a-2e20a377e48b/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (20)] Ended with exit code 0 [2021-10-13 08:17:29,939 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d741eefd-52c0-40a6-978a-2e20a377e48b/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-10-13 08:17:30,152 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d741eefd-52c0-40a6-978a-2e20a377e48b/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-10-13 08:17:30,331 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d741eefd-52c0-40a6-978a-2e20a377e48b/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d741eefd-52c0-40a6-978a-2e20a377e48b/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d741eefd-52c0-40a6-978a-2e20a377e48b/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 08:17:30,331 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)] === [2021-10-13 08:17:30,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 08:17:30,331 INFO L82 PathProgramCache]: Analyzing trace with hash -2104198502, now seen corresponding path program 1 times [2021-10-13 08:17:30,332 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 08:17:30,332 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1018992064] [2021-10-13 08:17:30,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:17:30,332 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 08:17:30,332 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d741eefd-52c0-40a6-978a-2e20a377e48b/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 08:17:30,333 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d741eefd-52c0-40a6-978a-2e20a377e48b/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 08:17:30,395 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d741eefd-52c0-40a6-978a-2e20a377e48b/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-10-13 08:17:30,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:17:30,642 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 26 conjunts are in the unsatisfiable core [2021-10-13 08:17:30,643 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:17:30,748 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 [2021-10-13 08:17:30,757 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 [2021-10-13 08:17:31,034 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 [2021-10-13 08:17:31,038 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 [2021-10-13 08:17:31,178 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:17:31,178 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 08:17:31,586 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 [2021-10-13 08:17:31,598 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 08:17:31,600 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 08:17:31,647 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:17:31,647 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 08:17:31,647 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1018992064] [2021-10-13 08:17:31,647 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1018992064] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 08:17:31,647 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [603171334] [2021-10-13 08:17:31,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:17:31,647 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-13 08:17:31,648 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d741eefd-52c0-40a6-978a-2e20a377e48b/bin/utaipan-q2qaUkNPG8/cvc4 [2021-10-13 08:17:31,655 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d741eefd-52c0-40a6-978a-2e20a377e48b/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-13 08:17:31,663 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d741eefd-52c0-40a6-978a-2e20a377e48b/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (23)] Waiting until timeout for monitored process [2021-10-13 08:17:32,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:17:32,053 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 14 conjunts are in the unsatisfiable core [2021-10-13 08:17:32,055 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:17:32,253 INFO L354 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2021-10-13 08:17:32,253 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 [2021-10-13 08:17:32,480 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 [2021-10-13 08:17:32,883 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 [2021-10-13 08:17:33,087 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:17:33,087 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 08:17:33,488 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 [2021-10-13 08:17:33,837 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:17:33,837 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [603171334] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 08:17:33,838 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [147816170] [2021-10-13 08:17:33,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:17:33,838 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 08:17:33,838 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d741eefd-52c0-40a6-978a-2e20a377e48b/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 08:17:33,843 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d741eefd-52c0-40a6-978a-2e20a377e48b/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 08:17:33,862 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d741eefd-52c0-40a6-978a-2e20a377e48b/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-10-13 08:17:34,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:17:34,281 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 13 conjunts are in the unsatisfiable core [2021-10-13 08:17:34,283 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:17:34,545 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 23 treesize of output 19 [2021-10-13 08:17:34,826 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 [2021-10-13 08:17:34,903 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:17:34,903 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 08:17:35,098 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 82 treesize of output 76 [2021-10-13 08:17:35,299 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-10-13 08:17:35,299 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 [2021-10-13 08:17:35,357 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:17:35,357 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [147816170] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 08:17:35,357 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-13 08:17:35,357 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 11, 9, 10, 9] total 38 [2021-10-13 08:17:35,358 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [489445208] [2021-10-13 08:17:35,358 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2021-10-13 08:17:35,358 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 08:17:35,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-10-13 08:17:35,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=1286, Unknown=0, NotChecked=0, Total=1406 [2021-10-13 08:17:35,360 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) [2021-10-13 08:17:43,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 08:17:43,048 INFO L93 Difference]: Finished difference Result 528 states and 672 transitions. [2021-10-13 08:17:43,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-10-13 08:17:43,049 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 [2021-10-13 08:17:43,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 08:17:43,054 INFO L225 Difference]: With dead ends: 528 [2021-10-13 08:17:43,055 INFO L226 Difference]: Without dead ends: 528 [2021-10-13 08:17:43,056 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 82 SyntacticMatches, 8 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 675 ImplicationChecksByTransitivity, 3478.1ms TimeCoverageRelationStatistics Valid=321, Invalid=2435, Unknown=0, NotChecked=0, Total=2756 [2021-10-13 08:17:43,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 528 states. [2021-10-13 08:17:43,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 528 to 250. [2021-10-13 08:17:43,070 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) [2021-10-13 08:17:43,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 346 transitions. [2021-10-13 08:17:43,073 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 346 transitions. Word has length 22 [2021-10-13 08:17:43,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 08:17:43,073 INFO L470 AbstractCegarLoop]: Abstraction has 250 states and 346 transitions. [2021-10-13 08:17:43,073 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) [2021-10-13 08:17:43,073 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 346 transitions. [2021-10-13 08:17:43,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-10-13 08:17:43,074 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 08:17:43,074 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] [2021-10-13 08:17:43,087 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d741eefd-52c0-40a6-978a-2e20a377e48b/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2021-10-13 08:17:43,308 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d741eefd-52c0-40a6-978a-2e20a377e48b/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2021-10-13 08:17:43,489 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d741eefd-52c0-40a6-978a-2e20a377e48b/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (23)] Forceful destruction successful, exit code 0 [2021-10-13 08:17:43,687 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d741eefd-52c0-40a6-978a-2e20a377e48b/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d741eefd-52c0-40a6-978a-2e20a377e48b/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d741eefd-52c0-40a6-978a-2e20a377e48b/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt [2021-10-13 08:17:43,687 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)] === [2021-10-13 08:17:43,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 08:17:43,687 INFO L82 PathProgramCache]: Analyzing trace with hash 439738587, now seen corresponding path program 1 times [2021-10-13 08:17:43,687 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 08:17:43,687 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [581427379] [2021-10-13 08:17:43,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:17:43,688 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 08:17:43,688 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d741eefd-52c0-40a6-978a-2e20a377e48b/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 08:17:43,689 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d741eefd-52c0-40a6-978a-2e20a377e48b/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 08:17:43,691 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d741eefd-52c0-40a6-978a-2e20a377e48b/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2021-10-13 08:17:44,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:17:44,007 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-13 08:17:44,011 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:17:44,166 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:17:44,166 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 08:17:44,305 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:17:44,305 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 08:17:44,305 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [581427379] [2021-10-13 08:17:44,305 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [581427379] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 08:17:44,305 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 08:17:44,305 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 6 [2021-10-13 08:17:44,306 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1125128912] [2021-10-13 08:17:44,306 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-13 08:17:44,306 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 08:17:44,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-13 08:17:44,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-10-13 08:17:44,307 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) [2021-10-13 08:17:44,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 08:17:44,476 INFO L93 Difference]: Finished difference Result 308 states and 396 transitions. [2021-10-13 08:17:44,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-13 08:17:44,478 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 [2021-10-13 08:17:44,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 08:17:44,480 INFO L225 Difference]: With dead ends: 308 [2021-10-13 08:17:44,480 INFO L226 Difference]: Without dead ends: 308 [2021-10-13 08:17:44,481 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 95.5ms TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-10-13 08:17:44,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 308 states. [2021-10-13 08:17:44,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 308 to 250. [2021-10-13 08:17:44,492 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) [2021-10-13 08:17:44,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 337 transitions. [2021-10-13 08:17:44,495 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 337 transitions. Word has length 23 [2021-10-13 08:17:44,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 08:17:44,497 INFO L470 AbstractCegarLoop]: Abstraction has 250 states and 337 transitions. [2021-10-13 08:17:44,498 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) [2021-10-13 08:17:44,498 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 337 transitions. [2021-10-13 08:17:44,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-10-13 08:17:44,500 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 08:17:44,500 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] [2021-10-13 08:17:44,518 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d741eefd-52c0-40a6-978a-2e20a377e48b/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2021-10-13 08:17:44,718 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d741eefd-52c0-40a6-978a-2e20a377e48b/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 08:17:44,718 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 41 more)] === [2021-10-13 08:17:44,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 08:17:44,719 INFO L82 PathProgramCache]: Analyzing trace with hash 387998185, now seen corresponding path program 1 times [2021-10-13 08:17:44,719 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 08:17:44,719 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [321250409] [2021-10-13 08:17:44,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:17:44,719 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 08:17:44,720 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d741eefd-52c0-40a6-978a-2e20a377e48b/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 08:17:44,720 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d741eefd-52c0-40a6-978a-2e20a377e48b/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 08:17:44,721 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d741eefd-52c0-40a6-978a-2e20a377e48b/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2021-10-13 08:17:45,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:17:45,053 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-13 08:17:45,054 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:17:45,145 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 [2021-10-13 08:17:45,368 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:17:45,368 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 08:17:45,617 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 [2021-10-13 08:17:45,696 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:17:45,696 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 08:17:45,696 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [321250409] [2021-10-13 08:17:45,696 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [321250409] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 08:17:45,697 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [82371615] [2021-10-13 08:17:45,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:17:45,697 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-13 08:17:45,697 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d741eefd-52c0-40a6-978a-2e20a377e48b/bin/utaipan-q2qaUkNPG8/cvc4 [2021-10-13 08:17:45,711 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d741eefd-52c0-40a6-978a-2e20a377e48b/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-13 08:17:45,712 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d741eefd-52c0-40a6-978a-2e20a377e48b/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (27)] Waiting until timeout for monitored process [2021-10-13 08:17:46,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:17:46,213 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-13 08:17:46,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:17:46,314 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 08:17:46,314 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 08:17:46,390 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 08:17:46,390 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [82371615] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 08:17:46,391 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-10-13 08:17:46,391 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [9, 8] total 15 [2021-10-13 08:17:46,391 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1619672385] [2021-10-13 08:17:46,391 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-13 08:17:46,391 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 08:17:46,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-13 08:17:46,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-10-13 08:17:46,392 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) [2021-10-13 08:17:46,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 08:17:46,428 INFO L93 Difference]: Finished difference Result 264 states and 356 transitions. [2021-10-13 08:17:46,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-13 08:17:46,429 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 [2021-10-13 08:17:46,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 08:17:46,431 INFO L225 Difference]: With dead ends: 264 [2021-10-13 08:17:46,431 INFO L226 Difference]: Without dead ends: 260 [2021-10-13 08:17:46,431 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 74 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 299.5ms TimeCoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2021-10-13 08:17:46,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2021-10-13 08:17:46,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 254. [2021-10-13 08:17:46,442 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) [2021-10-13 08:17:46,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 254 states to 254 states and 343 transitions. [2021-10-13 08:17:46,444 INFO L78 Accepts]: Start accepts. Automaton has 254 states and 343 transitions. Word has length 23 [2021-10-13 08:17:46,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 08:17:46,444 INFO L470 AbstractCegarLoop]: Abstraction has 254 states and 343 transitions. [2021-10-13 08:17:46,445 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) [2021-10-13 08:17:46,445 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states and 343 transitions. [2021-10-13 08:17:46,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-10-13 08:17:46,445 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 08:17:46,446 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] [2021-10-13 08:17:46,455 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d741eefd-52c0-40a6-978a-2e20a377e48b/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (27)] Forceful destruction successful, exit code 0 [2021-10-13 08:17:46,657 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d741eefd-52c0-40a6-978a-2e20a377e48b/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (26)] Forceful destruction successful, exit code 0 [2021-10-13 08:17:46,849 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d741eefd-52c0-40a6-978a-2e20a377e48b/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d741eefd-52c0-40a6-978a-2e20a377e48b/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 08:17:46,849 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr28REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 41 more)] === [2021-10-13 08:17:46,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 08:17:46,849 INFO L82 PathProgramCache]: Analyzing trace with hash 746999412, now seen corresponding path program 1 times [2021-10-13 08:17:46,850 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 08:17:46,850 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [132729138] [2021-10-13 08:17:46,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:17:46,850 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 08:17:46,850 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d741eefd-52c0-40a6-978a-2e20a377e48b/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 08:17:46,851 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d741eefd-52c0-40a6-978a-2e20a377e48b/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 08:17:46,865 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d741eefd-52c0-40a6-978a-2e20a377e48b/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2021-10-13 08:17:47,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:17:47,210 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-13 08:17:47,211 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:17:47,222 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 [2021-10-13 08:17:47,433 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:17:47,433 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 08:17:47,781 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:17:47,781 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 08:17:47,782 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [132729138] [2021-10-13 08:17:47,782 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [132729138] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 08:17:47,782 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 08:17:47,782 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 8 [2021-10-13 08:17:47,782 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [644245246] [2021-10-13 08:17:47,782 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-13 08:17:47,782 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 08:17:47,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-13 08:17:47,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-10-13 08:17:47,783 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) [2021-10-13 08:17:48,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 08:17:48,689 INFO L93 Difference]: Finished difference Result 272 states and 340 transitions. [2021-10-13 08:17:48,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-13 08:17:48,690 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 [2021-10-13 08:17:48,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 08:17:48,692 INFO L225 Difference]: With dead ends: 272 [2021-10-13 08:17:48,692 INFO L226 Difference]: Without dead ends: 272 [2021-10-13 08:17:48,693 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 261.5ms TimeCoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2021-10-13 08:17:48,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2021-10-13 08:17:48,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 253. [2021-10-13 08:17:48,701 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) [2021-10-13 08:17:48,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 253 states to 253 states and 334 transitions. [2021-10-13 08:17:48,703 INFO L78 Accepts]: Start accepts. Automaton has 253 states and 334 transitions. Word has length 24 [2021-10-13 08:17:48,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 08:17:48,703 INFO L470 AbstractCegarLoop]: Abstraction has 253 states and 334 transitions. [2021-10-13 08:17:48,703 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) [2021-10-13 08:17:48,703 INFO L276 IsEmpty]: Start isEmpty. Operand 253 states and 334 transitions. [2021-10-13 08:17:48,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-10-13 08:17:48,704 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 08:17:48,704 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] [2021-10-13 08:17:48,716 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d741eefd-52c0-40a6-978a-2e20a377e48b/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (28)] Forceful destruction successful, exit code 0 [2021-10-13 08:17:48,915 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d741eefd-52c0-40a6-978a-2e20a377e48b/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 08:17:48,915 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr27REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 41 more)] === [2021-10-13 08:17:48,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 08:17:48,915 INFO L82 PathProgramCache]: Analyzing trace with hash 746999411, now seen corresponding path program 1 times [2021-10-13 08:17:48,916 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 08:17:48,916 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2024020779] [2021-10-13 08:17:48,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:17:48,916 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 08:17:48,916 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d741eefd-52c0-40a6-978a-2e20a377e48b/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 08:17:48,917 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d741eefd-52c0-40a6-978a-2e20a377e48b/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 08:17:48,919 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d741eefd-52c0-40a6-978a-2e20a377e48b/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2021-10-13 08:17:49,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:17:49,376 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-13 08:17:49,377 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:17:49,382 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 [2021-10-13 08:17:49,520 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:17:49,520 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 08:17:49,616 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:17:49,616 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 08:17:49,616 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2024020779] [2021-10-13 08:17:49,617 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2024020779] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 08:17:49,617 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 08:17:49,617 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 5 [2021-10-13 08:17:49,617 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [840022017] [2021-10-13 08:17:49,617 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-13 08:17:49,617 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 08:17:49,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-13 08:17:49,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-10-13 08:17:49,618 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) [2021-10-13 08:17:50,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 08:17:50,109 INFO L93 Difference]: Finished difference Result 263 states and 326 transitions. [2021-10-13 08:17:50,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-13 08:17:50,111 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 [2021-10-13 08:17:50,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 08:17:50,113 INFO L225 Difference]: With dead ends: 263 [2021-10-13 08:17:50,113 INFO L226 Difference]: Without dead ends: 263 [2021-10-13 08:17:50,113 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 36 SyntacticMatches, 6 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 75.2ms TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-10-13 08:17:50,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2021-10-13 08:17:50,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 250. [2021-10-13 08:17:50,122 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) [2021-10-13 08:17:50,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 321 transitions. [2021-10-13 08:17:50,124 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 321 transitions. Word has length 24 [2021-10-13 08:17:50,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 08:17:50,124 INFO L470 AbstractCegarLoop]: Abstraction has 250 states and 321 transitions. [2021-10-13 08:17:50,124 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) [2021-10-13 08:17:50,124 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 321 transitions. [2021-10-13 08:17:50,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-10-13 08:17:50,125 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 08:17:50,125 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] [2021-10-13 08:17:50,139 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d741eefd-52c0-40a6-978a-2e20a377e48b/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (29)] Forceful destruction successful, exit code 0 [2021-10-13 08:17:50,339 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d741eefd-52c0-40a6-978a-2e20a377e48b/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 08:17:50,339 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr16REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 41 more)] === [2021-10-13 08:17:50,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 08:17:50,340 INFO L82 PathProgramCache]: Analyzing trace with hash 1457055843, now seen corresponding path program 1 times [2021-10-13 08:17:50,340 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 08:17:50,340 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2122300967] [2021-10-13 08:17:50,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:17:50,340 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 08:17:50,340 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d741eefd-52c0-40a6-978a-2e20a377e48b/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 08:17:50,341 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d741eefd-52c0-40a6-978a-2e20a377e48b/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 08:17:50,342 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d741eefd-52c0-40a6-978a-2e20a377e48b/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2021-10-13 08:17:50,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:17:50,859 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 12 conjunts are in the unsatisfiable core [2021-10-13 08:17:50,860 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:17:50,894 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 [2021-10-13 08:17:50,973 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 [2021-10-13 08:17:51,133 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 [2021-10-13 08:17:51,158 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:17:51,158 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 08:17:51,269 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 [2021-10-13 08:17:51,448 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:17:51,449 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 08:17:51,449 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2122300967] [2021-10-13 08:17:51,449 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2122300967] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 08:17:51,449 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1270073458] [2021-10-13 08:17:51,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:17:51,450 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-13 08:17:51,450 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d741eefd-52c0-40a6-978a-2e20a377e48b/bin/utaipan-q2qaUkNPG8/cvc4 [2021-10-13 08:17:51,455 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d741eefd-52c0-40a6-978a-2e20a377e48b/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-13 08:17:51,477 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d741eefd-52c0-40a6-978a-2e20a377e48b/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (31)] Waiting until timeout for monitored process [2021-10-13 08:17:52,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:17:52,093 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 14 conjunts are in the unsatisfiable core [2021-10-13 08:17:52,094 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:17:52,253 INFO L354 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2021-10-13 08:17:52,253 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 [2021-10-13 08:17:52,360 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 [2021-10-13 08:17:52,725 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 [2021-10-13 08:17:52,749 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:17:52,749 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 08:17:52,837 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 [2021-10-13 08:17:53,038 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:17:53,038 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1270073458] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 08:17:53,038 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [677055323] [2021-10-13 08:17:53,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:17:53,039 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 08:17:53,039 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d741eefd-52c0-40a6-978a-2e20a377e48b/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 08:17:53,043 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d741eefd-52c0-40a6-978a-2e20a377e48b/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 08:17:53,063 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d741eefd-52c0-40a6-978a-2e20a377e48b/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2021-10-13 08:17:53,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:17:53,718 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 13 conjunts are in the unsatisfiable core [2021-10-13 08:17:53,718 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:17:53,850 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 [2021-10-13 08:17:54,156 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 [2021-10-13 08:17:54,180 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:17:54,180 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 08:17:54,286 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 [2021-10-13 08:17:54,391 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-10-13 08:17:54,392 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 [2021-10-13 08:17:54,447 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:17:54,448 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [677055323] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 08:17:54,448 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-13 08:17:54,448 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 9, 6, 8, 6] total 21 [2021-10-13 08:17:54,448 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1067832068] [2021-10-13 08:17:54,449 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-10-13 08:17:54,449 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 08:17:54,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-10-13 08:17:54,449 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=377, Unknown=0, NotChecked=0, Total=462 [2021-10-13 08:17:54,450 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) [2021-10-13 08:18:15,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 08:18:15,357 INFO L93 Difference]: Finished difference Result 394 states and 473 transitions. [2021-10-13 08:18:15,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-10-13 08:18:15,358 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 [2021-10-13 08:18:15,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 08:18:15,360 INFO L225 Difference]: With dead ends: 394 [2021-10-13 08:18:15,360 INFO L226 Difference]: Without dead ends: 394 [2021-10-13 08:18:15,361 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 109 SyntacticMatches, 15 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 325 ImplicationChecksByTransitivity, 1186.9ms TimeCoverageRelationStatistics Valid=209, Invalid=661, Unknown=0, NotChecked=0, Total=870 [2021-10-13 08:18:15,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 394 states. [2021-10-13 08:18:15,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 394 to 250. [2021-10-13 08:18:15,373 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) [2021-10-13 08:18:15,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 320 transitions. [2021-10-13 08:18:15,376 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 320 transitions. Word has length 25 [2021-10-13 08:18:15,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 08:18:15,378 INFO L470 AbstractCegarLoop]: Abstraction has 250 states and 320 transitions. [2021-10-13 08:18:15,378 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) [2021-10-13 08:18:15,378 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 320 transitions. [2021-10-13 08:18:15,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-10-13 08:18:15,380 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 08:18:15,381 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] [2021-10-13 08:18:15,397 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d741eefd-52c0-40a6-978a-2e20a377e48b/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (30)] Forceful destruction successful, exit code 0 [2021-10-13 08:18:15,609 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d741eefd-52c0-40a6-978a-2e20a377e48b/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2021-10-13 08:18:15,790 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d741eefd-52c0-40a6-978a-2e20a377e48b/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (31)] Forceful destruction successful, exit code 0 [2021-10-13 08:18:15,987 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d741eefd-52c0-40a6-978a-2e20a377e48b/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3,32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d741eefd-52c0-40a6-978a-2e20a377e48b/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d741eefd-52c0-40a6-978a-2e20a377e48b/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt [2021-10-13 08:18:15,987 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr17REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 41 more)] === [2021-10-13 08:18:15,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 08:18:15,988 INFO L82 PathProgramCache]: Analyzing trace with hash 1457055844, now seen corresponding path program 1 times [2021-10-13 08:18:15,988 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 08:18:15,988 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2024071570] [2021-10-13 08:18:15,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:18:15,988 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 08:18:15,988 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d741eefd-52c0-40a6-978a-2e20a377e48b/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 08:18:15,989 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d741eefd-52c0-40a6-978a-2e20a377e48b/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 08:18:15,990 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d741eefd-52c0-40a6-978a-2e20a377e48b/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (33)] Waiting until timeout for monitored process [2021-10-13 08:18:16,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:18:16,444 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 15 conjunts are in the unsatisfiable core [2021-10-13 08:18:16,445 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:18:16,481 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 [2021-10-13 08:18:16,582 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 [2021-10-13 08:18:16,591 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 [2021-10-13 08:18:16,846 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 [2021-10-13 08:18:16,849 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 [2021-10-13 08:18:16,888 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:18:16,888 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 08:18:17,330 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 [2021-10-13 08:18:17,334 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 [2021-10-13 08:18:17,615 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 [2021-10-13 08:18:17,877 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:18:17,877 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 08:18:17,877 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2024071570] [2021-10-13 08:18:17,877 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2024071570] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 08:18:17,877 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [429264397] [2021-10-13 08:18:17,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:18:17,878 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-13 08:18:17,878 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d741eefd-52c0-40a6-978a-2e20a377e48b/bin/utaipan-q2qaUkNPG8/cvc4 [2021-10-13 08:18:17,883 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d741eefd-52c0-40a6-978a-2e20a377e48b/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-13 08:18:17,890 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d741eefd-52c0-40a6-978a-2e20a377e48b/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (34)] Waiting until timeout for monitored process [2021-10-13 08:18:18,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:18:18,542 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 16 conjunts are in the unsatisfiable core [2021-10-13 08:18:18,543 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:18:18,650 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 [2021-10-13 08:18:18,773 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 [2021-10-13 08:18:18,781 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 19 treesize of output 15 [2021-10-13 08:18:19,138 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 [2021-10-13 08:18:19,140 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 [2021-10-13 08:18:19,152 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:18:19,152 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 08:18:19,339 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 [2021-10-13 08:18:19,342 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 [2021-10-13 08:18:19,654 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 [2021-10-13 08:18:19,818 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:18:19,819 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [429264397] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 08:18:19,819 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [606482056] [2021-10-13 08:18:19,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:18:19,819 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 08:18:19,819 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d741eefd-52c0-40a6-978a-2e20a377e48b/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 08:18:19,820 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d741eefd-52c0-40a6-978a-2e20a377e48b/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 08:18:19,846 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d741eefd-52c0-40a6-978a-2e20a377e48b/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2021-10-13 08:18:20,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:18:20,440 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 16 conjunts are in the unsatisfiable core [2021-10-13 08:18:20,441 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:18:20,490 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 [2021-10-13 08:18:20,572 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 [2021-10-13 08:18:20,577 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 [2021-10-13 08:18:20,808 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 [2021-10-13 08:18:20,819 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 20 treesize of output 12 [2021-10-13 08:18:20,832 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:18:20,832 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 08:18:21,047 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 [2021-10-13 08:18:21,055 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 [2021-10-13 08:18:21,370 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 [2021-10-13 08:18:21,522 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:18:21,523 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [606482056] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 08:18:21,523 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-13 08:18:21,523 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 8, 6, 8, 6] total 17 [2021-10-13 08:18:21,523 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2119141785] [2021-10-13 08:18:21,524 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-10-13 08:18:21,524 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 08:18:21,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-10-13 08:18:21,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2021-10-13 08:18:21,525 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) [2021-10-13 08:18:37,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 08:18:37,110 INFO L93 Difference]: Finished difference Result 408 states and 486 transitions. [2021-10-13 08:18:37,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-10-13 08:18:37,112 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 [2021-10-13 08:18:37,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 08:18:37,114 INFO L225 Difference]: With dead ends: 408 [2021-10-13 08:18:37,114 INFO L226 Difference]: Without dead ends: 408 [2021-10-13 08:18:37,115 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 124 SyntacticMatches, 4 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 1198.8ms TimeCoverageRelationStatistics Valid=169, Invalid=533, Unknown=0, NotChecked=0, Total=702 [2021-10-13 08:18:37,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 408 states. [2021-10-13 08:18:37,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 408 to 250. [2021-10-13 08:18:37,123 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) [2021-10-13 08:18:37,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 319 transitions. [2021-10-13 08:18:37,125 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 319 transitions. Word has length 25 [2021-10-13 08:18:37,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 08:18:37,125 INFO L470 AbstractCegarLoop]: Abstraction has 250 states and 319 transitions. [2021-10-13 08:18:37,126 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) [2021-10-13 08:18:37,126 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 319 transitions. [2021-10-13 08:18:37,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-10-13 08:18:37,127 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 08:18:37,127 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] [2021-10-13 08:18:37,130 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d741eefd-52c0-40a6-978a-2e20a377e48b/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (34)] Forceful destruction successful, exit code 0 [2021-10-13 08:18:37,347 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d741eefd-52c0-40a6-978a-2e20a377e48b/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (33)] Forceful destruction successful, exit code 0 [2021-10-13 08:18:37,561 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d741eefd-52c0-40a6-978a-2e20a377e48b/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2021-10-13 08:18:37,739 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d741eefd-52c0-40a6-978a-2e20a377e48b/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt,33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d741eefd-52c0-40a6-978a-2e20a377e48b/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3,35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d741eefd-52c0-40a6-978a-2e20a377e48b/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 08:18:37,739 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr31REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 41 more)] === [2021-10-13 08:18:37,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 08:18:37,739 INFO L82 PathProgramCache]: Analyzing trace with hash 1633976965, now seen corresponding path program 1 times [2021-10-13 08:18:37,739 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 08:18:37,739 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [857807561] [2021-10-13 08:18:37,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:18:37,740 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 08:18:37,740 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d741eefd-52c0-40a6-978a-2e20a377e48b/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 08:18:37,740 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d741eefd-52c0-40a6-978a-2e20a377e48b/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 08:18:37,741 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d741eefd-52c0-40a6-978a-2e20a377e48b/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (36)] Waiting until timeout for monitored process [2021-10-13 08:18:38,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:18:38,255 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 15 conjunts are in the unsatisfiable core [2021-10-13 08:18:38,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:18:38,280 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 [2021-10-13 08:18:38,288 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 [2021-10-13 08:18:38,581 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 [2021-10-13 08:18:38,583 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 [2021-10-13 08:18:38,607 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:18:38,607 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 08:18:38,782 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:18:38,782 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 08:18:38,782 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [857807561] [2021-10-13 08:18:38,782 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [857807561] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 08:18:38,782 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 08:18:38,782 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 6] imperfect sequences [] total 7 [2021-10-13 08:18:38,783 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1756722854] [2021-10-13 08:18:38,783 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-13 08:18:38,783 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 08:18:38,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-13 08:18:38,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-10-13 08:18:38,784 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) [2021-10-13 08:18:53,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 08:18:53,713 INFO L93 Difference]: Finished difference Result 262 states and 329 transitions. [2021-10-13 08:18:53,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-13 08:18:53,714 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 [2021-10-13 08:18:53,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 08:18:53,715 INFO L225 Difference]: With dead ends: 262 [2021-10-13 08:18:53,716 INFO L226 Difference]: Without dead ends: 262 [2021-10-13 08:18:53,716 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 201.1ms TimeCoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2021-10-13 08:18:53,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2021-10-13 08:18:53,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 250. [2021-10-13 08:18:53,722 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) [2021-10-13 08:18:53,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 318 transitions. [2021-10-13 08:18:53,724 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 318 transitions. Word has length 27 [2021-10-13 08:18:53,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 08:18:53,725 INFO L470 AbstractCegarLoop]: Abstraction has 250 states and 318 transitions. [2021-10-13 08:18:53,725 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) [2021-10-13 08:18:53,725 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 318 transitions. [2021-10-13 08:18:53,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-10-13 08:18:53,726 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 08:18:53,726 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] [2021-10-13 08:18:53,743 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d741eefd-52c0-40a6-978a-2e20a377e48b/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (36)] Forceful destruction successful, exit code 0 [2021-10-13 08:18:53,939 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d741eefd-52c0-40a6-978a-2e20a377e48b/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 08:18:53,939 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)] === [2021-10-13 08:18:53,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 08:18:53,939 INFO L82 PathProgramCache]: Analyzing trace with hash 923786604, now seen corresponding path program 1 times [2021-10-13 08:18:53,940 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 08:18:53,940 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1126662396] [2021-10-13 08:18:53,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:18:53,940 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 08:18:53,940 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d741eefd-52c0-40a6-978a-2e20a377e48b/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 08:18:53,942 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d741eefd-52c0-40a6-978a-2e20a377e48b/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 08:18:53,948 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d741eefd-52c0-40a6-978a-2e20a377e48b/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (37)] Waiting until timeout for monitored process [2021-10-13 08:18:54,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:18:54,727 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 17 conjunts are in the unsatisfiable core [2021-10-13 08:18:54,728 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:18:54,823 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 [2021-10-13 08:18:54,912 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 [2021-10-13 08:18:54,918 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 [2021-10-13 08:18:55,053 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 [2021-10-13 08:18:55,055 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 [2021-10-13 08:18:55,163 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 08:18:55,164 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 08:18:55,755 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 [2021-10-13 08:18:55,774 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 08:18:55,775 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 08:18:55,779 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 08:18:55,783 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 08:18:56,012 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 08:18:56,012 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 08:18:56,012 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1126662396] [2021-10-13 08:18:56,012 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1126662396] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 08:18:56,012 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [300764868] [2021-10-13 08:18:56,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:18:56,013 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-13 08:18:56,013 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d741eefd-52c0-40a6-978a-2e20a377e48b/bin/utaipan-q2qaUkNPG8/cvc4 [2021-10-13 08:18:56,013 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d741eefd-52c0-40a6-978a-2e20a377e48b/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-13 08:18:56,018 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d741eefd-52c0-40a6-978a-2e20a377e48b/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (38)] Waiting until timeout for monitored process [2021-10-13 08:18:56,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:18:56,835 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 18 conjunts are in the unsatisfiable core [2021-10-13 08:18:56,836 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:18:57,014 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 [2021-10-13 08:18:57,137 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 [2021-10-13 08:18:57,145 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 [2021-10-13 08:18:57,404 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 [2021-10-13 08:18:57,415 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 [2021-10-13 08:18:57,443 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 08:18:57,443 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 08:18:57,594 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 [2021-10-13 08:18:57,621 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 08:18:57,622 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 08:18:57,626 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 08:18:57,627 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 08:18:57,762 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 08:18:57,762 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [300764868] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 08:18:57,762 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2054972175] [2021-10-13 08:18:57,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:18:57,762 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 08:18:57,763 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d741eefd-52c0-40a6-978a-2e20a377e48b/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 08:18:57,787 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d741eefd-52c0-40a6-978a-2e20a377e48b/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 08:18:57,788 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d741eefd-52c0-40a6-978a-2e20a377e48b/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2021-10-13 08:18:58,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:18:58,517 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 18 conjunts are in the unsatisfiable core [2021-10-13 08:18:58,517 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:18:58,618 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 [2021-10-13 08:18:58,696 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 [2021-10-13 08:18:58,701 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 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 [2021-10-13 08:18:58,839 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 [2021-10-13 08:18:58,844 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 [2021-10-13 08:18:58,885 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 08:18:58,885 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 08:18:59,043 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 [2021-10-13 08:18:59,069 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 08:18:59,071 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 08:18:59,074 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 08:18:59,075 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 08:18:59,218 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 08:18:59,219 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2054972175] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 08:18:59,219 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-13 08:18:59,219 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 10, 9, 10, 9] total 22 [2021-10-13 08:18:59,219 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [720999385] [2021-10-13 08:18:59,220 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-10-13 08:18:59,220 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 08:18:59,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-10-13 08:18:59,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=440, Unknown=0, NotChecked=0, Total=506 [2021-10-13 08:18:59,221 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) [2021-10-13 08:19:02,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 08:19:02,188 INFO L93 Difference]: Finished difference Result 316 states and 390 transitions. [2021-10-13 08:19:02,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-10-13 08:19:02,190 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 [2021-10-13 08:19:02,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 08:19:02,192 INFO L225 Difference]: With dead ends: 316 [2021-10-13 08:19:02,192 INFO L226 Difference]: Without dead ends: 316 [2021-10-13 08:19:02,193 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 140 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 1338.7ms TimeCoverageRelationStatistics Valid=114, Invalid=642, Unknown=0, NotChecked=0, Total=756 [2021-10-13 08:19:02,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 316 states. [2021-10-13 08:19:02,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 316 to 250. [2021-10-13 08:19:02,200 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) [2021-10-13 08:19:02,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 317 transitions. [2021-10-13 08:19:02,202 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 317 transitions. Word has length 28 [2021-10-13 08:19:02,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 08:19:02,202 INFO L470 AbstractCegarLoop]: Abstraction has 250 states and 317 transitions. [2021-10-13 08:19:02,202 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) [2021-10-13 08:19:02,203 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 317 transitions. [2021-10-13 08:19:02,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-10-13 08:19:02,203 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 08:19:02,203 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] [2021-10-13 08:19:02,235 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d741eefd-52c0-40a6-978a-2e20a377e48b/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2021-10-13 08:19:02,425 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d741eefd-52c0-40a6-978a-2e20a377e48b/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (38)] Forceful destruction successful, exit code 0 [2021-10-13 08:19:02,629 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d741eefd-52c0-40a6-978a-2e20a377e48b/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (37)] Forceful destruction successful, exit code 0 [2021-10-13 08:19:02,820 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d741eefd-52c0-40a6-978a-2e20a377e48b/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d741eefd-52c0-40a6-978a-2e20a377e48b/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt,37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d741eefd-52c0-40a6-978a-2e20a377e48b/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 08:19:02,820 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr24REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 41 more)] === [2021-10-13 08:19:02,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 08:19:02,820 INFO L82 PathProgramCache]: Analyzing trace with hash 427343141, now seen corresponding path program 1 times [2021-10-13 08:19:02,820 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 08:19:02,821 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [748460156] [2021-10-13 08:19:02,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:19:02,821 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 08:19:02,821 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d741eefd-52c0-40a6-978a-2e20a377e48b/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 08:19:02,822 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d741eefd-52c0-40a6-978a-2e20a377e48b/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 08:19:02,823 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d741eefd-52c0-40a6-978a-2e20a377e48b/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (40)] Waiting until timeout for monitored process [2021-10-13 08:19:03,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:19:03,461 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 12 conjunts are in the unsatisfiable core [2021-10-13 08:19:03,462 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:19:03,580 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 [2021-10-13 08:19:03,689 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 [2021-10-13 08:19:03,712 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:19:03,712 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 08:19:03,773 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 [2021-10-13 08:19:03,843 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:19:03,843 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 08:19:03,843 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [748460156] [2021-10-13 08:19:03,843 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [748460156] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 08:19:03,843 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [173296375] [2021-10-13 08:19:03,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:19:03,844 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-13 08:19:03,844 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d741eefd-52c0-40a6-978a-2e20a377e48b/bin/utaipan-q2qaUkNPG8/cvc4 [2021-10-13 08:19:03,844 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d741eefd-52c0-40a6-978a-2e20a377e48b/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-13 08:19:03,846 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d741eefd-52c0-40a6-978a-2e20a377e48b/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (41)] Waiting until timeout for monitored process [2021-10-13 08:19:04,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:19:04,771 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 13 conjunts are in the unsatisfiable core [2021-10-13 08:19:04,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:19:04,912 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 [2021-10-13 08:19:05,086 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 [2021-10-13 08:19:05,099 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:19:05,099 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 08:19:05,171 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 [2021-10-13 08:19:05,242 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:19:05,242 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [173296375] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 08:19:05,242 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1904814902] [2021-10-13 08:19:05,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:19:05,242 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 08:19:05,243 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d741eefd-52c0-40a6-978a-2e20a377e48b/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 08:19:05,251 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d741eefd-52c0-40a6-978a-2e20a377e48b/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 08:19:05,270 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d741eefd-52c0-40a6-978a-2e20a377e48b/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2021-10-13 08:19:06,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:19:06,072 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 13 conjunts are in the unsatisfiable core [2021-10-13 08:19:06,087 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:19:06,190 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 [2021-10-13 08:19:06,327 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 [2021-10-13 08:19:06,358 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:19:06,359 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 08:19:06,428 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 [2021-10-13 08:19:06,502 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:19:06,502 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1904814902] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 08:19:06,502 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-13 08:19:06,502 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 9, 7, 9, 7] total 14 [2021-10-13 08:19:06,502 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1531925354] [2021-10-13 08:19:06,503 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-10-13 08:19:06,503 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 08:19:06,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-10-13 08:19:06,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2021-10-13 08:19:06,504 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) [2021-10-13 08:19:31,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 08:19:31,642 INFO L93 Difference]: Finished difference Result 342 states and 405 transitions. [2021-10-13 08:19:31,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-10-13 08:19:31,642 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 [2021-10-13 08:19:31,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 08:19:31,644 INFO L225 Difference]: With dead ends: 342 [2021-10-13 08:19:31,644 INFO L226 Difference]: Without dead ends: 342 [2021-10-13 08:19:31,644 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 140 SyntacticMatches, 4 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 372.1ms TimeCoverageRelationStatistics Valid=107, Invalid=273, Unknown=0, NotChecked=0, Total=380 [2021-10-13 08:19:31,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 342 states. [2021-10-13 08:19:31,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 342 to 237. [2021-10-13 08:19:31,651 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) [2021-10-13 08:19:31,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 237 states to 237 states and 297 transitions. [2021-10-13 08:19:31,653 INFO L78 Accepts]: Start accepts. Automaton has 237 states and 297 transitions. Word has length 27 [2021-10-13 08:19:31,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 08:19:31,653 INFO L470 AbstractCegarLoop]: Abstraction has 237 states and 297 transitions. [2021-10-13 08:19:31,654 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) [2021-10-13 08:19:31,654 INFO L276 IsEmpty]: Start isEmpty. Operand 237 states and 297 transitions. [2021-10-13 08:19:31,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-10-13 08:19:31,654 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 08:19:31,655 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] [2021-10-13 08:19:31,666 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d741eefd-52c0-40a6-978a-2e20a377e48b/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (40)] Forceful destruction successful, exit code 0 [2021-10-13 08:19:31,866 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d741eefd-52c0-40a6-978a-2e20a377e48b/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (41)] Forceful destruction successful, exit code 0 [2021-10-13 08:19:32,086 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d741eefd-52c0-40a6-978a-2e20a377e48b/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2021-10-13 08:19:32,263 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d741eefd-52c0-40a6-978a-2e20a377e48b/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3,41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d741eefd-52c0-40a6-978a-2e20a377e48b/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt,42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d741eefd-52c0-40a6-978a-2e20a377e48b/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 08:19:32,263 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr37REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 41 more)] === [2021-10-13 08:19:32,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 08:19:32,264 INFO L82 PathProgramCache]: Analyzing trace with hash -1697542573, now seen corresponding path program 1 times [2021-10-13 08:19:32,264 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 08:19:32,264 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [511876586] [2021-10-13 08:19:32,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:19:32,264 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 08:19:32,264 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d741eefd-52c0-40a6-978a-2e20a377e48b/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 08:19:32,265 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d741eefd-52c0-40a6-978a-2e20a377e48b/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 08:19:32,266 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d741eefd-52c0-40a6-978a-2e20a377e48b/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (43)] Waiting until timeout for monitored process [2021-10-13 08:19:32,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:19:32,960 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 15 conjunts are in the unsatisfiable core [2021-10-13 08:19:32,961 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:19:33,136 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 [2021-10-13 08:19:33,138 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 [2021-10-13 08:19:33,161 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:19:33,162 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 08:19:33,290 INFO L354 Elim1Store]: treesize reduction 4, result has 63.6 percent of original size [2021-10-13 08:19:33,290 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 [2021-10-13 08:19:33,296 INFO L354 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2021-10-13 08:19:33,296 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 [2021-10-13 08:19:33,339 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:19:33,339 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 08:19:33,339 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [511876586] [2021-10-13 08:19:33,339 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [511876586] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 08:19:33,339 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 08:19:33,339 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 8 [2021-10-13 08:19:33,340 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [87459409] [2021-10-13 08:19:33,340 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-13 08:19:33,340 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 08:19:33,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-13 08:19:33,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-10-13 08:19:33,341 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) [2021-10-13 08:19:33,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 08:19:33,780 INFO L93 Difference]: Finished difference Result 279 states and 343 transitions. [2021-10-13 08:19:33,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-13 08:19:33,781 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 [2021-10-13 08:19:33,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 08:19:33,782 INFO L225 Difference]: With dead ends: 279 [2021-10-13 08:19:33,782 INFO L226 Difference]: Without dead ends: 279 [2021-10-13 08:19:33,783 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 163.7ms TimeCoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2021-10-13 08:19:33,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 279 states. [2021-10-13 08:19:33,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 279 to 259. [2021-10-13 08:19:33,789 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) [2021-10-13 08:19:33,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 324 transitions. [2021-10-13 08:19:33,791 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 324 transitions. Word has length 29 [2021-10-13 08:19:33,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 08:19:33,791 INFO L470 AbstractCegarLoop]: Abstraction has 259 states and 324 transitions. [2021-10-13 08:19:33,791 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) [2021-10-13 08:19:33,792 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 324 transitions. [2021-10-13 08:19:33,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-10-13 08:19:33,792 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 08:19:33,792 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] [2021-10-13 08:19:33,819 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d741eefd-52c0-40a6-978a-2e20a377e48b/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (43)] Ended with exit code 0 [2021-10-13 08:19:34,006 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d741eefd-52c0-40a6-978a-2e20a377e48b/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 08:19:34,006 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 41 more)] === [2021-10-13 08:19:34,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 08:19:34,007 INFO L82 PathProgramCache]: Analyzing trace with hash -1143560603, now seen corresponding path program 1 times [2021-10-13 08:19:34,007 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 08:19:34,007 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [926883781] [2021-10-13 08:19:34,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:19:34,007 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 08:19:34,007 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d741eefd-52c0-40a6-978a-2e20a377e48b/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 08:19:34,008 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d741eefd-52c0-40a6-978a-2e20a377e48b/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 08:19:34,010 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d741eefd-52c0-40a6-978a-2e20a377e48b/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (44)] Waiting until timeout for monitored process [2021-10-13 08:19:34,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:19:34,737 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-13 08:19:34,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:19:34,749 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 [2021-10-13 08:19:34,901 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-10-13 08:19:34,901 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 08:19:34,983 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-10-13 08:19:34,983 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 08:19:34,983 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [926883781] [2021-10-13 08:19:34,983 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [926883781] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 08:19:34,983 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 08:19:34,983 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 5 [2021-10-13 08:19:34,984 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1700419431] [2021-10-13 08:19:34,984 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-13 08:19:34,984 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 08:19:34,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-13 08:19:34,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-10-13 08:19:34,989 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) [2021-10-13 08:19:35,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 08:19:35,461 INFO L93 Difference]: Finished difference Result 274 states and 332 transitions. [2021-10-13 08:19:35,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-13 08:19:35,462 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 [2021-10-13 08:19:35,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 08:19:35,463 INFO L225 Difference]: With dead ends: 274 [2021-10-13 08:19:35,463 INFO L226 Difference]: Without dead ends: 274 [2021-10-13 08:19:35,463 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 51 SyntacticMatches, 3 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 58.8ms TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-10-13 08:19:35,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274 states. [2021-10-13 08:19:35,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274 to 258. [2021-10-13 08:19:35,469 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) [2021-10-13 08:19:35,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 258 states to 258 states and 322 transitions. [2021-10-13 08:19:35,470 INFO L78 Accepts]: Start accepts. Automaton has 258 states and 322 transitions. Word has length 30 [2021-10-13 08:19:35,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 08:19:35,470 INFO L470 AbstractCegarLoop]: Abstraction has 258 states and 322 transitions. [2021-10-13 08:19:35,471 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) [2021-10-13 08:19:35,471 INFO L276 IsEmpty]: Start isEmpty. Operand 258 states and 322 transitions. [2021-10-13 08:19:35,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-10-13 08:19:35,472 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 08:19:35,472 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] [2021-10-13 08:19:35,486 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d741eefd-52c0-40a6-978a-2e20a377e48b/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (44)] Ended with exit code 0 [2021-10-13 08:19:35,686 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d741eefd-52c0-40a6-978a-2e20a377e48b/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 08:19:35,686 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 41 more)] === [2021-10-13 08:19:35,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 08:19:35,686 INFO L82 PathProgramCache]: Analyzing trace with hash -1143560602, now seen corresponding path program 1 times [2021-10-13 08:19:35,687 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 08:19:35,687 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1322085714] [2021-10-13 08:19:35,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:19:35,687 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 08:19:35,687 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d741eefd-52c0-40a6-978a-2e20a377e48b/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 08:19:35,688 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d741eefd-52c0-40a6-978a-2e20a377e48b/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 08:19:35,689 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d741eefd-52c0-40a6-978a-2e20a377e48b/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (45)] Waiting until timeout for monitored process [2021-10-13 08:19:36,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:19:36,438 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-13 08:19:36,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:19:36,454 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 [2021-10-13 08:19:36,671 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-10-13 08:19:36,672 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 08:19:36,931 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-10-13 08:19:36,932 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 08:19:36,932 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1322085714] [2021-10-13 08:19:36,932 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1322085714] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 08:19:36,932 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 08:19:36,932 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 8 [2021-10-13 08:19:36,932 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [180436406] [2021-10-13 08:19:36,932 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-13 08:19:36,932 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 08:19:36,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-13 08:19:36,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-10-13 08:19:36,934 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) [2021-10-13 08:19:38,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 08:19:38,049 INFO L93 Difference]: Finished difference Result 274 states and 327 transitions. [2021-10-13 08:19:38,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-13 08:19:38,059 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 [2021-10-13 08:19:38,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 08:19:38,060 INFO L225 Difference]: With dead ends: 274 [2021-10-13 08:19:38,060 INFO L226 Difference]: Without dead ends: 274 [2021-10-13 08:19:38,060 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 248.5ms TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2021-10-13 08:19:38,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274 states. [2021-10-13 08:19:38,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274 to 254. [2021-10-13 08:19:38,066 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) [2021-10-13 08:19:38,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 254 states to 254 states and 315 transitions. [2021-10-13 08:19:38,068 INFO L78 Accepts]: Start accepts. Automaton has 254 states and 315 transitions. Word has length 30 [2021-10-13 08:19:38,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 08:19:38,068 INFO L470 AbstractCegarLoop]: Abstraction has 254 states and 315 transitions. [2021-10-13 08:19:38,068 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) [2021-10-13 08:19:38,069 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states and 315 transitions. [2021-10-13 08:19:38,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-10-13 08:19:38,069 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 08:19:38,069 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] [2021-10-13 08:19:38,094 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d741eefd-52c0-40a6-978a-2e20a377e48b/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (45)] Forceful destruction successful, exit code 0 [2021-10-13 08:19:38,283 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d741eefd-52c0-40a6-978a-2e20a377e48b/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 08:19:38,284 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr24REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 41 more)] === [2021-10-13 08:19:38,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 08:19:38,284 INFO L82 PathProgramCache]: Analyzing trace with hash 793451563, now seen corresponding path program 1 times [2021-10-13 08:19:38,284 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 08:19:38,284 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1038849921] [2021-10-13 08:19:38,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:19:38,284 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 08:19:38,285 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d741eefd-52c0-40a6-978a-2e20a377e48b/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 08:19:38,285 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d741eefd-52c0-40a6-978a-2e20a377e48b/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 08:19:38,288 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d741eefd-52c0-40a6-978a-2e20a377e48b/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (46)] Waiting until timeout for monitored process [2021-10-13 08:19:39,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:19:39,142 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 27 conjunts are in the unsatisfiable core [2021-10-13 08:19:39,143 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:19:39,149 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 [2021-10-13 08:19:39,167 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 [2021-10-13 08:19:39,177 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 [2021-10-13 08:19:39,214 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 08:19:39,215 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 [2021-10-13 08:19:39,230 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 08:19:39,230 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 [2021-10-13 08:19:39,359 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-13 08:19:39,359 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 [2021-10-13 08:19:39,467 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 08:19:39,468 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 [2021-10-13 08:19:39,492 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 08:19:39,493 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 [2021-10-13 08:19:39,590 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 08:19:39,603 INFO L354 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2021-10-13 08:19:39,603 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 [2021-10-13 08:19:39,623 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 08:19:39,625 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 08:19:39,626 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 [2021-10-13 08:19:39,738 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 08:19:39,775 INFO L354 Elim1Store]: treesize reduction 128, result has 11.7 percent of original size [2021-10-13 08:19:39,776 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 [2021-10-13 08:19:39,782 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 08:19:39,816 INFO L354 Elim1Store]: treesize reduction 188, result has 13.4 percent of original size [2021-10-13 08:19:39,816 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 [2021-10-13 08:19:44,904 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-13 08:19:45,143 INFO L354 Elim1Store]: treesize reduction 271, result has 18.1 percent of original size [2021-10-13 08:19:45,143 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 [2021-10-13 08:19:45,259 INFO L354 Elim1Store]: treesize reduction 168, result has 21.1 percent of original size [2021-10-13 08:19:45,259 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 [2021-10-13 08:19:45,558 INFO L354 Elim1Store]: treesize reduction 72, result has 1.4 percent of original size [2021-10-13 08:19:45,558 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 [2021-10-13 08:19:45,575 INFO L354 Elim1Store]: treesize reduction 62, result has 1.6 percent of original size [2021-10-13 08:19:45,576 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 [2021-10-13 08:19:45,641 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:19:45,641 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 08:20:22,097 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 [2021-10-13 08:20:24,173 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 [2021-10-13 08:20:26,295 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 [2021-10-13 08:21:05,958 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 [2021-10-13 08:21:09,462 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:21:09,463 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 08:21:09,463 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1038849921] [2021-10-13 08:21:09,463 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1038849921] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 08:21:09,463 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1277218655] [2021-10-13 08:21:09,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:21:09,463 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-13 08:21:09,463 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d741eefd-52c0-40a6-978a-2e20a377e48b/bin/utaipan-q2qaUkNPG8/cvc4 [2021-10-13 08:21:09,465 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d741eefd-52c0-40a6-978a-2e20a377e48b/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-13 08:21:09,465 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d741eefd-52c0-40a6-978a-2e20a377e48b/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (47)] Waiting until timeout for monitored process [2021-10-13 08:21:10,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:21:10,637 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 30 conjunts are in the unsatisfiable core [2021-10-13 08:21:10,639 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:21:10,767 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 [2021-10-13 08:21:10,785 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 [2021-10-13 08:21:10,946 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 08:21:10,947 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 [2021-10-13 08:21:10,967 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 08:21:10,968 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 [2021-10-13 08:21:11,648 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 08:21:11,731 INFO L354 Elim1Store]: treesize reduction 36, result has 49.3 percent of original size [2021-10-13 08:21:11,731 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 [2021-10-13 08:21:11,791 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 08:21:11,846 INFO L354 Elim1Store]: treesize reduction 54, result has 23.9 percent of original size [2021-10-13 08:21:11,847 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 [2021-10-13 08:21:12,250 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 08:21:12,314 INFO L354 Elim1Store]: treesize reduction 108, result has 18.2 percent of original size [2021-10-13 08:21:12,314 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 [2021-10-13 08:21:12,368 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 08:21:12,375 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 08:21:12,461 INFO L354 Elim1Store]: treesize reduction 88, result has 16.2 percent of original size [2021-10-13 08:21:12,462 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 [2021-10-13 08:21:13,010 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 08:21:13,109 INFO L354 Elim1Store]: treesize reduction 128, result has 11.7 percent of original size [2021-10-13 08:21:13,110 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 [2021-10-13 08:21:13,118 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 08:21:13,188 INFO L354 Elim1Store]: treesize reduction 188, result has 13.4 percent of original size [2021-10-13 08:21:13,188 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 [2021-10-13 08:21:30,140 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-13 08:21:30,391 INFO L354 Elim1Store]: treesize reduction 344, result has 13.8 percent of original size [2021-10-13 08:21:30,391 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 [2021-10-13 08:21:30,544 INFO L354 Elim1Store]: treesize reduction 275, result has 13.8 percent of original size [2021-10-13 08:21:30,545 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 [2021-10-13 08:21:31,190 INFO L354 Elim1Store]: treesize reduction 99, result has 25.6 percent of original size [2021-10-13 08:21:31,190 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 [2021-10-13 08:21:32,566 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:21:32,567 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 08:21:34,632 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((|ULTIMATE.start_remove_#t~mem6.offset| (_ BitVec 32))) (= (_ bv0 32) (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_remove_#t~mem6.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_remove_#t~mem6.base|) |ULTIMATE.start_remove_#t~mem6.offset| |c_ULTIMATE.start_remove_#t~mem7.base|)) c_ULTIMATE.start_remove_~x.base) c_ULTIMATE.start_remove_~x.offset))) (forall ((|ULTIMATE.start_remove_#t~mem6.offset| (_ BitVec 32))) (= (select (select (store |c_#memory_$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| |c_ULTIMATE.start_remove_#t~mem7.offset|)) c_ULTIMATE.start_remove_~x.base) c_ULTIMATE.start_remove_~x.offset) (_ bv0 32)))) is different from false [2021-10-13 08:21:36,655 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 [2021-10-13 08:21:38,683 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((|ULTIMATE.start_remove_#t~mem6.offset| (_ BitVec 32))) (= (select (select (let ((.cse0 (select (select |c_#memory_$Pointer$.base| c_ULTIMATE.start_remove_~x.base) (bvadd (_ bv4 32) c_ULTIMATE.start_remove_~x.offset)))) (store |c_#memory_$Pointer$.offset| .cse0 (store (select |c_#memory_$Pointer$.offset| .cse0) |ULTIMATE.start_remove_#t~mem6.offset| (select (select |c_#memory_$Pointer$.offset| c_ULTIMATE.start_remove_~x.base) c_ULTIMATE.start_remove_~x.offset)))) c_ULTIMATE.start_remove_~x.base) c_ULTIMATE.start_remove_~x.offset) (_ bv0 32))) (forall ((|ULTIMATE.start_remove_#t~mem6.offset| (_ BitVec 32))) (= (select (select (let ((.cse2 (select |c_#memory_$Pointer$.base| c_ULTIMATE.start_remove_~x.base))) (let ((.cse1 (select .cse2 (bvadd (_ bv4 32) c_ULTIMATE.start_remove_~x.offset)))) (store |c_#memory_$Pointer$.base| .cse1 (store (select |c_#memory_$Pointer$.base| .cse1) |ULTIMATE.start_remove_#t~mem6.offset| (select .cse2 c_ULTIMATE.start_remove_~x.offset))))) c_ULTIMATE.start_remove_~x.base) c_ULTIMATE.start_remove_~x.offset) (_ bv0 32)))) is different from false [2021-10-13 08:21:40,745 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((|ULTIMATE.start_remove_#t~mem6.offset| (_ BitVec 32))) (= (select (select (let ((.cse1 (select |c_#memory_$Pointer$.base| c_ULTIMATE.start_main_~x~0.base))) (let ((.cse0 (select .cse1 (bvadd (_ bv4 32) c_ULTIMATE.start_main_~x~0.offset)))) (store |c_#memory_$Pointer$.base| .cse0 (store (select |c_#memory_$Pointer$.base| .cse0) |ULTIMATE.start_remove_#t~mem6.offset| (select .cse1 c_ULTIMATE.start_main_~x~0.offset))))) c_ULTIMATE.start_main_~x~0.base) c_ULTIMATE.start_main_~x~0.offset) (_ bv0 32))) (forall ((|ULTIMATE.start_remove_#t~mem6.offset| (_ BitVec 32))) (= (select (select (let ((.cse2 (select (select |c_#memory_$Pointer$.base| c_ULTIMATE.start_main_~x~0.base) (bvadd (_ bv4 32) c_ULTIMATE.start_main_~x~0.offset)))) (store |c_#memory_$Pointer$.offset| .cse2 (store (select |c_#memory_$Pointer$.offset| .cse2) |ULTIMATE.start_remove_#t~mem6.offset| (select (select |c_#memory_$Pointer$.offset| c_ULTIMATE.start_main_~x~0.base) c_ULTIMATE.start_main_~x~0.offset)))) c_ULTIMATE.start_main_~x~0.base) c_ULTIMATE.start_main_~x~0.offset) (_ bv0 32)))) is different from false [2021-10-13 08:21:42,876 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((|ULTIMATE.start_remove_#t~mem6.offset| (_ BitVec 32))) (= (_ bv0 32) (select (select (let ((.cse0 (store |c_#memory_$Pointer$.base| c_ULTIMATE.start_main_~tail~0.base (store (select |c_#memory_$Pointer$.base| c_ULTIMATE.start_main_~tail~0.base) (bvadd (_ bv4 32) c_ULTIMATE.start_main_~tail~0.offset) c_ULTIMATE.start_main_~n~0.base)))) (let ((.cse2 (select .cse0 c_ULTIMATE.start_main_~x~0.base))) (let ((.cse1 (select .cse2 (bvadd (_ bv4 32) c_ULTIMATE.start_main_~x~0.offset)))) (store .cse0 .cse1 (store (select .cse0 .cse1) |ULTIMATE.start_remove_#t~mem6.offset| (select .cse2 c_ULTIMATE.start_main_~x~0.offset)))))) c_ULTIMATE.start_main_~x~0.base) c_ULTIMATE.start_main_~x~0.offset))) (forall ((|ULTIMATE.start_remove_#t~mem6.offset| (_ BitVec 32))) (= (select (select (let ((.cse5 (bvadd (_ bv4 32) c_ULTIMATE.start_main_~tail~0.offset))) (let ((.cse4 (select (select (store |c_#memory_$Pointer$.base| c_ULTIMATE.start_main_~tail~0.base (store (select |c_#memory_$Pointer$.base| c_ULTIMATE.start_main_~tail~0.base) .cse5 c_ULTIMATE.start_main_~n~0.base)) c_ULTIMATE.start_main_~x~0.base) (bvadd (_ bv4 32) c_ULTIMATE.start_main_~x~0.offset))) (.cse3 (store |c_#memory_$Pointer$.offset| c_ULTIMATE.start_main_~tail~0.base (store (select |c_#memory_$Pointer$.offset| c_ULTIMATE.start_main_~tail~0.base) .cse5 c_ULTIMATE.start_main_~n~0.offset)))) (store .cse3 .cse4 (store (select .cse3 .cse4) |ULTIMATE.start_remove_#t~mem6.offset| (select (select .cse3 c_ULTIMATE.start_main_~x~0.base) c_ULTIMATE.start_main_~x~0.offset))))) c_ULTIMATE.start_main_~x~0.base) c_ULTIMATE.start_main_~x~0.offset) (_ bv0 32)))) is different from false [2021-10-13 08:22:04,239 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((ULTIMATE.start_main_~n~0.offset (_ BitVec 32)) (|ULTIMATE.start_remove_#t~mem6.offset| (_ BitVec 32))) (= (select (select (let ((.cse0 (let ((.cse3 (store |c_#memory_$Pointer$.base| c_ULTIMATE.start_main_~n~0.base (store (store (select |c_#memory_$Pointer$.base| c_ULTIMATE.start_main_~n~0.base) ULTIMATE.start_main_~n~0.offset c_ULTIMATE.start_main_~tail~0.base) (bvadd ULTIMATE.start_main_~n~0.offset (_ bv4 32)) (_ bv0 32))))) (store .cse3 c_ULTIMATE.start_main_~tail~0.base (store (select .cse3 c_ULTIMATE.start_main_~tail~0.base) (bvadd (_ bv4 32) c_ULTIMATE.start_main_~tail~0.offset) c_ULTIMATE.start_main_~n~0.base))))) (let ((.cse2 (select .cse0 c_ULTIMATE.start_main_~x~0.base))) (let ((.cse1 (select .cse2 (bvadd (_ bv4 32) c_ULTIMATE.start_main_~x~0.offset)))) (store .cse0 .cse1 (store (select .cse0 .cse1) |ULTIMATE.start_remove_#t~mem6.offset| (select .cse2 c_ULTIMATE.start_main_~x~0.offset)))))) c_ULTIMATE.start_main_~x~0.base) c_ULTIMATE.start_main_~x~0.offset) (_ bv0 32))) (forall ((ULTIMATE.start_main_~n~0.offset (_ BitVec 32)) (|ULTIMATE.start_remove_#t~mem6.offset| (_ BitVec 32))) (= (select (select (let ((.cse7 (bvadd (_ bv4 32) c_ULTIMATE.start_main_~tail~0.offset)) (.cse8 (bvadd ULTIMATE.start_main_~n~0.offset (_ bv4 32)))) (let ((.cse5 (select (select (let ((.cse9 (store |c_#memory_$Pointer$.base| c_ULTIMATE.start_main_~n~0.base (store (store (select |c_#memory_$Pointer$.base| c_ULTIMATE.start_main_~n~0.base) ULTIMATE.start_main_~n~0.offset c_ULTIMATE.start_main_~tail~0.base) .cse8 (_ bv0 32))))) (store .cse9 c_ULTIMATE.start_main_~tail~0.base (store (select .cse9 c_ULTIMATE.start_main_~tail~0.base) .cse7 c_ULTIMATE.start_main_~n~0.base))) c_ULTIMATE.start_main_~x~0.base) (bvadd (_ bv4 32) c_ULTIMATE.start_main_~x~0.offset))) (.cse4 (let ((.cse6 (store |c_#memory_$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) .cse8 (_ bv0 32))))) (store .cse6 c_ULTIMATE.start_main_~tail~0.base (store (select .cse6 c_ULTIMATE.start_main_~tail~0.base) .cse7 ULTIMATE.start_main_~n~0.offset))))) (store .cse4 .cse5 (store (select .cse4 .cse5) |ULTIMATE.start_remove_#t~mem6.offset| (select (select .cse4 c_ULTIMATE.start_main_~x~0.base) c_ULTIMATE.start_main_~x~0.offset))))) c_ULTIMATE.start_main_~x~0.base) c_ULTIMATE.start_main_~x~0.offset) (_ bv0 32)))) is different from false [2021-10-13 08:23:13,241 INFO L354 Elim1Store]: treesize reduction 191, result has 20.4 percent of original size [2021-10-13 08:23:13,241 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 1587 treesize of output 1011 [2021-10-13 08:23:13,442 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-13 08:23:13,443 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 661 treesize of output 641 [2021-10-13 08:23:13,459 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Should have been eliminated by DER [2021-10-13 08:23:13,459 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1192341990] [2021-10-13 08:23:13,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:23:13,460 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 08:23:13,460 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d741eefd-52c0-40a6-978a-2e20a377e48b/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 08:23:13,462 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d741eefd-52c0-40a6-978a-2e20a377e48b/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 08:23:13,463 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d741eefd-52c0-40a6-978a-2e20a377e48b/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2021-10-13 08:23:14,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:23:14,694 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 27 conjunts are in the unsatisfiable core [2021-10-13 08:23:14,696 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:23:14,706 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.smtlibutils.IncrementalPlicationChecker@6637c36a [2021-10-13 08:23:14,706 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 08:23:14,706 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 26 [2021-10-13 08:23:14,706 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [229930475] [2021-10-13 08:23:14,707 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-10-13 08:23:14,707 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 08:23:14,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-10-13 08:23:14,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=182, Invalid=1350, Unknown=68, NotChecked=850, Total=2450 [2021-10-13 08:23:14,709 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) [2021-10-13 08:23:14,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-10-13 08:23:14,718 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d741eefd-52c0-40a6-978a-2e20a377e48b/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (47)] Forceful destruction successful, exit code 0 [2021-10-13 08:23:14,933 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d741eefd-52c0-40a6-978a-2e20a377e48b/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2021-10-13 08:23:15,122 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d741eefd-52c0-40a6-978a-2e20a377e48b/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (46)] Forceful destruction successful, exit code 0 [2021-10-13 08:23:15,310 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d741eefd-52c0-40a6-978a-2e20a377e48b/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt,48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d741eefd-52c0-40a6-978a-2e20a377e48b/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d741eefd-52c0-40a6-978a-2e20a377e48b/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 08:23:15,311 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@6637c36a 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) [2021-10-13 08:23:15,314 INFO L168 Benchmark]: Toolchain (without parser) took 399884.14 ms. Allocated memory was 58.7 MB in the beginning and 169.9 MB in the end (delta: 111.1 MB). Free memory was 34.9 MB in the beginning and 76.5 MB in the end (delta: -41.7 MB). Peak memory consumption was 69.2 MB. Max. memory is 16.1 GB. [2021-10-13 08:23:15,315 INFO L168 Benchmark]: CDTParser took 0.25 ms. Allocated memory is still 58.7 MB. Free memory is still 39.2 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-13 08:23:15,315 INFO L168 Benchmark]: CACSL2BoogieTranslator took 536.74 ms. Allocated memory was 58.7 MB in the beginning and 77.6 MB in the end (delta: 18.9 MB). Free memory was 34.7 MB in the beginning and 52.2 MB in the end (delta: -17.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-10-13 08:23:15,315 INFO L168 Benchmark]: Boogie Procedure Inliner took 63.10 ms. Allocated memory is still 77.6 MB. Free memory was 52.2 MB in the beginning and 49.9 MB in the end (delta: 2.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-13 08:23:15,316 INFO L168 Benchmark]: Boogie Preprocessor took 56.64 ms. Allocated memory is still 77.6 MB. Free memory was 49.9 MB in the beginning and 48.3 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-13 08:23:15,316 INFO L168 Benchmark]: RCFGBuilder took 796.05 ms. Allocated memory is still 77.6 MB. Free memory was 48.0 MB in the beginning and 52.8 MB in the end (delta: -4.9 MB). Peak memory consumption was 19.4 MB. Max. memory is 16.1 GB. [2021-10-13 08:23:15,317 INFO L168 Benchmark]: TraceAbstraction took 398424.64 ms. Allocated memory was 77.6 MB in the beginning and 169.9 MB in the end (delta: 92.3 MB). Free memory was 52.2 MB in the beginning and 76.5 MB in the end (delta: -24.3 MB). Peak memory consumption was 67.2 MB. Max. memory is 16.1 GB. [2021-10-13 08:23:15,319 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25 ms. Allocated memory is still 58.7 MB. Free memory is still 39.2 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 536.74 ms. Allocated memory was 58.7 MB in the beginning and 77.6 MB in the end (delta: 18.9 MB). Free memory was 34.7 MB in the beginning and 52.2 MB in the end (delta: -17.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 63.10 ms. Allocated memory is still 77.6 MB. Free memory was 52.2 MB in the beginning and 49.9 MB in the end (delta: 2.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 56.64 ms. Allocated memory is still 77.6 MB. Free memory was 49.9 MB in the beginning and 48.3 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 796.05 ms. Allocated memory is still 77.6 MB. Free memory was 48.0 MB in the beginning and 52.8 MB in the end (delta: -4.9 MB). Peak memory consumption was 19.4 MB. Max. memory is 16.1 GB. * TraceAbstraction took 398424.64 ms. Allocated memory was 77.6 MB in the beginning and 169.9 MB in the end (delta: 92.3 MB). Free memory was 52.2 MB in the beginning and 76.5 MB in the end (delta: -24.3 MB). Peak memory consumption was 67.2 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@6637c36a de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: IllegalStateException: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.smtlibutils.IncrementalPlicationChecker@6637c36a: de.uni_freiburg.informatik.ultimate.lib.smtlibutils.ManagedScript.lock(ManagedScript.java:81) RESULT: Ultimate could not prove your program: Toolchain returned no result. [2021-10-13 08:23:15,412 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d741eefd-52c0-40a6-978a-2e20a377e48b/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...