./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/elevator_spec1_product31.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 9bd2c7ff Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c63e8de8-b99b-44b6-8280-46173e1afc63/bin/utaipan-verify-t7M7D8N6sZ/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c63e8de8-b99b-44b6-8280-46173e1afc63/bin/utaipan-verify-t7M7D8N6sZ/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c63e8de8-b99b-44b6-8280-46173e1afc63/bin/utaipan-verify-t7M7D8N6sZ/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c63e8de8-b99b-44b6-8280-46173e1afc63/bin/utaipan-verify-t7M7D8N6sZ/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec1_product31.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c63e8de8-b99b-44b6-8280-46173e1afc63/bin/utaipan-verify-t7M7D8N6sZ/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c63e8de8-b99b-44b6-8280-46173e1afc63/bin/utaipan-verify-t7M7D8N6sZ --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 04ae9a4eaad9b026cab167b9d875c53fcb305c3c3f2af8aa4a0b048c8b5ef4cb --- Real Ultimate output --- This is Ultimate 0.2.3-dev-9bd2c7f [2023-11-19 05:09:28,708 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-19 05:09:28,835 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c63e8de8-b99b-44b6-8280-46173e1afc63/bin/utaipan-verify-t7M7D8N6sZ/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-11-19 05:09:28,847 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-19 05:09:28,848 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-19 05:09:28,895 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-19 05:09:28,896 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-19 05:09:28,897 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-19 05:09:28,898 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-19 05:09:28,904 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-19 05:09:28,905 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-19 05:09:28,906 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-19 05:09:28,907 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-19 05:09:28,909 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-19 05:09:28,910 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-19 05:09:28,910 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-19 05:09:28,911 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-19 05:09:28,911 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-19 05:09:28,912 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-19 05:09:28,912 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-19 05:09:28,913 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-19 05:09:28,914 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-19 05:09:28,915 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-19 05:09:28,916 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-19 05:09:28,916 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-19 05:09:28,917 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-19 05:09:28,917 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-19 05:09:28,918 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-19 05:09:28,918 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-19 05:09:28,919 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-19 05:09:28,920 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-19 05:09:28,921 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-19 05:09:28,921 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-19 05:09:28,921 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-19 05:09:28,922 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-19 05:09:28,922 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-19 05:09:28,922 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 05:09:28,923 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-19 05:09:28,923 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-19 05:09:28,923 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-19 05:09:28,924 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-19 05:09:28,924 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-19 05:09:28,924 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-19 05:09:28,925 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-19 05:09:28,925 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-19 05:09:28,926 INFO L153 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_c63e8de8-b99b-44b6-8280-46173e1afc63/bin/utaipan-verify-t7M7D8N6sZ/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c63e8de8-b99b-44b6-8280-46173e1afc63/bin/utaipan-verify-t7M7D8N6sZ Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 04ae9a4eaad9b026cab167b9d875c53fcb305c3c3f2af8aa4a0b048c8b5ef4cb [2023-11-19 05:09:29,268 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-19 05:09:29,306 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-19 05:09:29,310 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-19 05:09:29,311 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-19 05:09:29,312 INFO L274 PluginConnector]: CDTParser initialized [2023-11-19 05:09:29,314 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c63e8de8-b99b-44b6-8280-46173e1afc63/bin/utaipan-verify-t7M7D8N6sZ/../../sv-benchmarks/c/product-lines/elevator_spec1_product31.cil.c [2023-11-19 05:09:32,642 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-19 05:09:33,207 INFO L384 CDTParser]: Found 1 translation units. [2023-11-19 05:09:33,208 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c63e8de8-b99b-44b6-8280-46173e1afc63/sv-benchmarks/c/product-lines/elevator_spec1_product31.cil.c [2023-11-19 05:09:33,247 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c63e8de8-b99b-44b6-8280-46173e1afc63/bin/utaipan-verify-t7M7D8N6sZ/data/3d9f74012/c34ca40abde94f4e957ce0850c63fec6/FLAG5372ef5f3 [2023-11-19 05:09:33,271 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c63e8de8-b99b-44b6-8280-46173e1afc63/bin/utaipan-verify-t7M7D8N6sZ/data/3d9f74012/c34ca40abde94f4e957ce0850c63fec6 [2023-11-19 05:09:33,281 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-19 05:09:33,283 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-19 05:09:33,287 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-19 05:09:33,288 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-19 05:09:33,294 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-19 05:09:33,295 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 05:09:33" (1/1) ... [2023-11-19 05:09:33,296 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@70e34624 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:09:33, skipping insertion in model container [2023-11-19 05:09:33,297 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 05:09:33" (1/1) ... [2023-11-19 05:09:33,393 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-19 05:09:33,783 WARN L240 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_c63e8de8-b99b-44b6-8280-46173e1afc63/sv-benchmarks/c/product-lines/elevator_spec1_product31.cil.c[11232,11245] [2023-11-19 05:09:34,311 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 05:09:34,331 INFO L202 MainTranslator]: Completed pre-run [2023-11-19 05:09:34,345 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"libacc.i","") [48] [2023-11-19 05:09:34,347 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"wsllib_check.i","") [414] [2023-11-19 05:09:34,348 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Elevator.i","") [423] [2023-11-19 05:09:34,348 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"UnitTests.i","") [2054] [2023-11-19 05:09:34,350 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"scenario.i","") [2148] [2023-11-19 05:09:34,350 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Person.i","") [2164] [2023-11-19 05:09:34,351 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Specification1_spec.i","") [2282] [2023-11-19 05:09:34,351 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Test.i","") [2463] [2023-11-19 05:09:34,351 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Floor.i","") [2816] [2023-11-19 05:09:34,352 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"featureselect.i","") [3481] [2023-11-19 05:09:34,412 WARN L240 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_c63e8de8-b99b-44b6-8280-46173e1afc63/sv-benchmarks/c/product-lines/elevator_spec1_product31.cil.c[11232,11245] [2023-11-19 05:09:34,552 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 05:09:34,591 INFO L206 MainTranslator]: Completed translation [2023-11-19 05:09:34,592 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:09:34 WrapperNode [2023-11-19 05:09:34,592 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-19 05:09:34,594 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-19 05:09:34,594 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-19 05:09:34,594 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-19 05:09:34,604 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:09:34" (1/1) ... [2023-11-19 05:09:34,643 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:09:34" (1/1) ... [2023-11-19 05:09:34,735 INFO L138 Inliner]: procedures = 97, calls = 350, calls flagged for inlining = 28, calls inlined = 25, statements flattened = 954 [2023-11-19 05:09:34,736 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-19 05:09:34,737 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-19 05:09:34,737 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-19 05:09:34,737 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-19 05:09:34,750 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:09:34" (1/1) ... [2023-11-19 05:09:34,750 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:09:34" (1/1) ... [2023-11-19 05:09:34,762 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:09:34" (1/1) ... [2023-11-19 05:09:34,762 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:09:34" (1/1) ... [2023-11-19 05:09:34,806 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:09:34" (1/1) ... [2023-11-19 05:09:34,851 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:09:34" (1/1) ... [2023-11-19 05:09:34,859 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:09:34" (1/1) ... [2023-11-19 05:09:34,870 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:09:34" (1/1) ... [2023-11-19 05:09:34,899 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-19 05:09:34,902 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-19 05:09:34,902 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-19 05:09:34,902 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-19 05:09:34,906 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:09:34" (1/1) ... [2023-11-19 05:09:34,914 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 05:09:34,932 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c63e8de8-b99b-44b6-8280-46173e1afc63/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 05:09:34,952 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c63e8de8-b99b-44b6-8280-46173e1afc63/bin/utaipan-verify-t7M7D8N6sZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-19 05:09:34,982 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c63e8de8-b99b-44b6-8280-46173e1afc63/bin/utaipan-verify-t7M7D8N6sZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-19 05:09:35,015 INFO L130 BoogieDeclarations]: Found specification of procedure bigMacCall [2023-11-19 05:09:35,016 INFO L138 BoogieDeclarations]: Found implementation of procedure bigMacCall [2023-11-19 05:09:35,016 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2023-11-19 05:09:35,016 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2023-11-19 05:09:35,016 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2023-11-19 05:09:35,016 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2023-11-19 05:09:35,017 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection__wrappee__empty [2023-11-19 05:09:35,017 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection__wrappee__empty [2023-11-19 05:09:35,018 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2023-11-19 05:09:35,018 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2023-11-19 05:09:35,018 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2023-11-19 05:09:35,019 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2023-11-19 05:09:35,020 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2023-11-19 05:09:35,020 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2023-11-19 05:09:35,021 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2023-11-19 05:09:35,022 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2023-11-19 05:09:35,022 INFO L130 BoogieDeclarations]: Found specification of procedure buttonForFloorIsPressed [2023-11-19 05:09:35,022 INFO L138 BoogieDeclarations]: Found implementation of procedure buttonForFloorIsPressed [2023-11-19 05:09:35,023 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2023-11-19 05:09:35,024 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2023-11-19 05:09:35,024 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2023-11-19 05:09:35,024 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2023-11-19 05:09:35,024 INFO L130 BoogieDeclarations]: Found specification of procedure angelinaCall [2023-11-19 05:09:35,024 INFO L138 BoogieDeclarations]: Found implementation of procedure angelinaCall [2023-11-19 05:09:35,025 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-19 05:09:35,026 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor__wrappee__twothirdsfull [2023-11-19 05:09:35,026 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor__wrappee__twothirdsfull [2023-11-19 05:09:35,027 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2023-11-19 05:09:35,027 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2023-11-19 05:09:35,027 INFO L130 BoogieDeclarations]: Found specification of procedure isExecutiveFloorCalling [2023-11-19 05:09:35,027 INFO L138 BoogieDeclarations]: Found implementation of procedure isExecutiveFloorCalling [2023-11-19 05:09:35,027 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2023-11-19 05:09:35,028 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2023-11-19 05:09:35,028 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2023-11-19 05:09:35,028 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2023-11-19 05:09:35,028 INFO L130 BoogieDeclarations]: Found specification of procedure areDoorsOpen [2023-11-19 05:09:35,028 INFO L138 BoogieDeclarations]: Found implementation of procedure areDoorsOpen [2023-11-19 05:09:35,029 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2023-11-19 05:09:35,029 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2023-11-19 05:09:35,029 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2023-11-19 05:09:35,029 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2023-11-19 05:09:35,029 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2023-11-19 05:09:35,030 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2023-11-19 05:09:35,030 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2023-11-19 05:09:35,030 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2023-11-19 05:09:35,030 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2023-11-19 05:09:35,030 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2023-11-19 05:09:35,031 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2023-11-19 05:09:35,031 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2023-11-19 05:09:35,032 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2023-11-19 05:09:35,032 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2023-11-19 05:09:35,032 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-19 05:09:35,032 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2023-11-19 05:09:35,033 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2023-11-19 05:09:35,033 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-19 05:09:35,033 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-19 05:09:35,033 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2023-11-19 05:09:35,034 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2023-11-19 05:09:35,317 INFO L236 CfgBuilder]: Building ICFG [2023-11-19 05:09:35,323 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-19 05:09:36,849 INFO L277 CfgBuilder]: Performing block encoding [2023-11-19 05:09:38,118 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-19 05:09:38,119 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-19 05:09:38,139 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 05:09:38 BoogieIcfgContainer [2023-11-19 05:09:38,140 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-19 05:09:38,144 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-19 05:09:38,144 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-19 05:09:38,149 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-19 05:09:38,149 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 05:09:33" (1/3) ... [2023-11-19 05:09:38,150 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5317ad38 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 05:09:38, skipping insertion in model container [2023-11-19 05:09:38,150 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:09:34" (2/3) ... [2023-11-19 05:09:38,152 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5317ad38 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 05:09:38, skipping insertion in model container [2023-11-19 05:09:38,153 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 05:09:38" (3/3) ... [2023-11-19 05:09:38,154 INFO L112 eAbstractionObserver]: Analyzing ICFG elevator_spec1_product31.cil.c [2023-11-19 05:09:38,181 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-19 05:09:38,182 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-19 05:09:38,299 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 05:09:38,310 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@42cff321, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-19 05:09:38,311 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-19 05:09:38,322 INFO L276 IsEmpty]: Start isEmpty. Operand has 404 states, 270 states have (on average 1.5703703703703704) internal successors, (424), 291 states have internal predecessors, (424), 105 states have call successors, (105), 27 states have call predecessors, (105), 27 states have return successors, (105), 99 states have call predecessors, (105), 105 states have call successors, (105) [2023-11-19 05:09:38,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2023-11-19 05:09:38,376 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:09:38,377 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:09:38,378 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:09:38,389 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:09:38,390 INFO L85 PathProgramCache]: Analyzing trace with hash -1920168282, now seen corresponding path program 1 times [2023-11-19 05:09:38,404 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:09:38,405 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [465385703] [2023-11-19 05:09:38,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:09:38,406 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:09:38,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:09:39,107 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-11-19 05:09:39,107 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:09:39,108 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [465385703] [2023-11-19 05:09:39,109 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [465385703] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:09:39,109 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 05:09:39,109 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 05:09:39,111 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [293612718] [2023-11-19 05:09:39,112 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:09:39,119 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-19 05:09:39,120 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:09:39,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-19 05:09:39,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-19 05:09:39,176 INFO L87 Difference]: Start difference. First operand has 404 states, 270 states have (on average 1.5703703703703704) internal successors, (424), 291 states have internal predecessors, (424), 105 states have call successors, (105), 27 states have call predecessors, (105), 27 states have return successors, (105), 99 states have call predecessors, (105), 105 states have call successors, (105) Second operand has 2 states, 2 states have (on average 23.0) internal successors, (46), 2 states have internal predecessors, (46), 2 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 2 states have call predecessors, (16), 1 states have call successors, (16) [2023-11-19 05:09:39,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:09:39,406 INFO L93 Difference]: Finished difference Result 422 states and 661 transitions. [2023-11-19 05:09:39,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-19 05:09:39,409 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 23.0) internal successors, (46), 2 states have internal predecessors, (46), 2 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 2 states have call predecessors, (16), 1 states have call successors, (16) Word has length 88 [2023-11-19 05:09:39,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:09:39,430 INFO L225 Difference]: With dead ends: 422 [2023-11-19 05:09:39,431 INFO L226 Difference]: Without dead ends: 400 [2023-11-19 05:09:39,435 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-19 05:09:39,439 INFO L413 NwaCegarLoop]: 589 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 589 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 05:09:39,440 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 589 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 05:09:39,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 400 states. [2023-11-19 05:09:39,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 400 to 400. [2023-11-19 05:09:39,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 400 states, 268 states have (on average 1.5597014925373134) internal successors, (418), 287 states have internal predecessors, (418), 105 states have call successors, (105), 27 states have call predecessors, (105), 26 states have return successors, (100), 98 states have call predecessors, (100), 100 states have call successors, (100) [2023-11-19 05:09:39,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 400 states to 400 states and 623 transitions. [2023-11-19 05:09:39,535 INFO L78 Accepts]: Start accepts. Automaton has 400 states and 623 transitions. Word has length 88 [2023-11-19 05:09:39,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:09:39,538 INFO L495 AbstractCegarLoop]: Abstraction has 400 states and 623 transitions. [2023-11-19 05:09:39,538 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 23.0) internal successors, (46), 2 states have internal predecessors, (46), 2 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 2 states have call predecessors, (16), 1 states have call successors, (16) [2023-11-19 05:09:39,538 INFO L276 IsEmpty]: Start isEmpty. Operand 400 states and 623 transitions. [2023-11-19 05:09:39,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2023-11-19 05:09:39,546 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:09:39,547 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:09:39,547 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-19 05:09:39,547 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:09:39,548 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:09:39,548 INFO L85 PathProgramCache]: Analyzing trace with hash 1271020624, now seen corresponding path program 1 times [2023-11-19 05:09:39,548 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:09:39,549 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1768191421] [2023-11-19 05:09:39,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:09:39,549 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:09:39,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:09:40,409 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-11-19 05:09:40,411 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:09:40,414 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1768191421] [2023-11-19 05:09:40,415 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1768191421] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:09:40,415 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 05:09:40,416 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-19 05:09:40,417 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [451691681] [2023-11-19 05:09:40,417 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:09:40,419 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-19 05:09:40,420 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:09:40,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-19 05:09:40,428 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-19 05:09:40,428 INFO L87 Difference]: Start difference. First operand 400 states and 623 transitions. Second operand has 7 states, 7 states have (on average 6.714285714285714) internal successors, (47), 7 states have internal predecessors, (47), 5 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 5 states have call predecessors, (16), 4 states have call successors, (16) [2023-11-19 05:09:43,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:09:43,130 INFO L93 Difference]: Finished difference Result 1217 states and 1930 transitions. [2023-11-19 05:09:43,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-19 05:09:43,131 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.714285714285714) internal successors, (47), 7 states have internal predecessors, (47), 5 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 5 states have call predecessors, (16), 4 states have call successors, (16) Word has length 89 [2023-11-19 05:09:43,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:09:43,140 INFO L225 Difference]: With dead ends: 1217 [2023-11-19 05:09:43,140 INFO L226 Difference]: Without dead ends: 840 [2023-11-19 05:09:43,145 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2023-11-19 05:09:43,147 INFO L413 NwaCegarLoop]: 375 mSDtfsCounter, 1216 mSDsluCounter, 1230 mSDsCounter, 0 mSdLazyCounter, 2370 mSolverCounterSat, 457 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1299 SdHoareTripleChecker+Valid, 1605 SdHoareTripleChecker+Invalid, 2827 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 457 IncrementalHoareTripleChecker+Valid, 2370 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2023-11-19 05:09:43,147 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1299 Valid, 1605 Invalid, 2827 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [457 Valid, 2370 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2023-11-19 05:09:43,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 840 states. [2023-11-19 05:09:43,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 840 to 791. [2023-11-19 05:09:43,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 791 states, 540 states have (on average 1.5740740740740742) internal successors, (850), 573 states have internal predecessors, (850), 201 states have call successors, (201), 49 states have call predecessors, (201), 49 states have return successors, (202), 193 states have call predecessors, (202), 196 states have call successors, (202) [2023-11-19 05:09:43,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 791 states to 791 states and 1253 transitions. [2023-11-19 05:09:43,230 INFO L78 Accepts]: Start accepts. Automaton has 791 states and 1253 transitions. Word has length 89 [2023-11-19 05:09:43,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:09:43,231 INFO L495 AbstractCegarLoop]: Abstraction has 791 states and 1253 transitions. [2023-11-19 05:09:43,231 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.714285714285714) internal successors, (47), 7 states have internal predecessors, (47), 5 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 5 states have call predecessors, (16), 4 states have call successors, (16) [2023-11-19 05:09:43,231 INFO L276 IsEmpty]: Start isEmpty. Operand 791 states and 1253 transitions. [2023-11-19 05:09:43,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2023-11-19 05:09:43,235 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:09:43,236 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:09:43,236 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-19 05:09:43,236 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:09:43,237 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:09:43,237 INFO L85 PathProgramCache]: Analyzing trace with hash -1811253800, now seen corresponding path program 1 times [2023-11-19 05:09:43,237 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:09:43,237 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [816855866] [2023-11-19 05:09:43,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:09:43,238 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:09:43,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:09:43,660 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-11-19 05:09:43,661 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:09:43,661 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [816855866] [2023-11-19 05:09:43,661 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [816855866] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:09:43,662 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 05:09:43,662 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-19 05:09:43,662 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1523045817] [2023-11-19 05:09:43,662 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:09:43,663 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-19 05:09:43,664 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:09:43,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-19 05:09:43,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-19 05:09:43,665 INFO L87 Difference]: Start difference. First operand 791 states and 1253 transitions. Second operand has 6 states, 6 states have (on average 8.166666666666666) internal successors, (49), 6 states have internal predecessors, (49), 3 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (17), 3 states have call predecessors, (17), 2 states have call successors, (17) [2023-11-19 05:09:44,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:09:44,241 INFO L93 Difference]: Finished difference Result 862 states and 1365 transitions. [2023-11-19 05:09:44,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-19 05:09:44,242 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.166666666666666) internal successors, (49), 6 states have internal predecessors, (49), 3 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (17), 3 states have call predecessors, (17), 2 states have call successors, (17) Word has length 93 [2023-11-19 05:09:44,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:09:44,251 INFO L225 Difference]: With dead ends: 862 [2023-11-19 05:09:44,252 INFO L226 Difference]: Without dead ends: 847 [2023-11-19 05:09:44,253 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2023-11-19 05:09:44,254 INFO L413 NwaCegarLoop]: 578 mSDtfsCounter, 715 mSDsluCounter, 962 mSDsCounter, 0 mSdLazyCounter, 329 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 716 SdHoareTripleChecker+Valid, 1540 SdHoareTripleChecker+Invalid, 351 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 329 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-19 05:09:44,255 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [716 Valid, 1540 Invalid, 351 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 329 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-19 05:09:44,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 847 states. [2023-11-19 05:09:44,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 847 to 795. [2023-11-19 05:09:44,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 795 states, 544 states have (on average 1.5698529411764706) internal successors, (854), 577 states have internal predecessors, (854), 201 states have call successors, (201), 49 states have call predecessors, (201), 49 states have return successors, (202), 193 states have call predecessors, (202), 196 states have call successors, (202) [2023-11-19 05:09:44,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 795 states to 795 states and 1257 transitions. [2023-11-19 05:09:44,329 INFO L78 Accepts]: Start accepts. Automaton has 795 states and 1257 transitions. Word has length 93 [2023-11-19 05:09:44,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:09:44,330 INFO L495 AbstractCegarLoop]: Abstraction has 795 states and 1257 transitions. [2023-11-19 05:09:44,330 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.166666666666666) internal successors, (49), 6 states have internal predecessors, (49), 3 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (17), 3 states have call predecessors, (17), 2 states have call successors, (17) [2023-11-19 05:09:44,330 INFO L276 IsEmpty]: Start isEmpty. Operand 795 states and 1257 transitions. [2023-11-19 05:09:44,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2023-11-19 05:09:44,334 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:09:44,334 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:09:44,335 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-19 05:09:44,335 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:09:44,336 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:09:44,336 INFO L85 PathProgramCache]: Analyzing trace with hash -1263631651, now seen corresponding path program 1 times [2023-11-19 05:09:44,336 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:09:44,336 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [308831614] [2023-11-19 05:09:44,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:09:44,337 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:09:44,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:09:44,814 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-11-19 05:09:44,815 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:09:44,815 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [308831614] [2023-11-19 05:09:44,815 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [308831614] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:09:44,815 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 05:09:44,815 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-19 05:09:44,816 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1308775120] [2023-11-19 05:09:44,816 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:09:44,816 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-19 05:09:44,817 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:09:44,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-19 05:09:44,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-19 05:09:44,818 INFO L87 Difference]: Start difference. First operand 795 states and 1257 transitions. Second operand has 6 states, 5 states have (on average 10.4) internal successors, (52), 5 states have internal predecessors, (52), 2 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (18), 3 states have call predecessors, (18), 1 states have call successors, (18) [2023-11-19 05:09:45,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:09:45,039 INFO L93 Difference]: Finished difference Result 814 states and 1281 transitions. [2023-11-19 05:09:45,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-19 05:09:45,040 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 10.4) internal successors, (52), 5 states have internal predecessors, (52), 2 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (18), 3 states have call predecessors, (18), 1 states have call successors, (18) Word has length 98 [2023-11-19 05:09:45,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:09:45,048 INFO L225 Difference]: With dead ends: 814 [2023-11-19 05:09:45,048 INFO L226 Difference]: Without dead ends: 799 [2023-11-19 05:09:45,050 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-11-19 05:09:45,051 INFO L413 NwaCegarLoop]: 588 mSDtfsCounter, 41 mSDsluCounter, 2303 mSDsCounter, 0 mSdLazyCounter, 187 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 2891 SdHoareTripleChecker+Invalid, 187 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 187 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 05:09:45,052 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 2891 Invalid, 187 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 187 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 05:09:45,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 799 states. [2023-11-19 05:09:45,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 799 to 795. [2023-11-19 05:09:45,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 795 states, 544 states have (on average 1.5661764705882353) internal successors, (852), 577 states have internal predecessors, (852), 201 states have call successors, (201), 49 states have call predecessors, (201), 49 states have return successors, (202), 193 states have call predecessors, (202), 196 states have call successors, (202) [2023-11-19 05:09:45,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 795 states to 795 states and 1255 transitions. [2023-11-19 05:09:45,144 INFO L78 Accepts]: Start accepts. Automaton has 795 states and 1255 transitions. Word has length 98 [2023-11-19 05:09:45,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:09:45,145 INFO L495 AbstractCegarLoop]: Abstraction has 795 states and 1255 transitions. [2023-11-19 05:09:45,145 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 10.4) internal successors, (52), 5 states have internal predecessors, (52), 2 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (18), 3 states have call predecessors, (18), 1 states have call successors, (18) [2023-11-19 05:09:45,146 INFO L276 IsEmpty]: Start isEmpty. Operand 795 states and 1255 transitions. [2023-11-19 05:09:45,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2023-11-19 05:09:45,150 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:09:45,150 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:09:45,150 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-19 05:09:45,150 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:09:45,151 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:09:45,151 INFO L85 PathProgramCache]: Analyzing trace with hash 1929179005, now seen corresponding path program 1 times [2023-11-19 05:09:45,151 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:09:45,152 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1892252082] [2023-11-19 05:09:45,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:09:45,152 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:09:45,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:09:48,540 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-11-19 05:09:48,541 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:09:48,541 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1892252082] [2023-11-19 05:09:48,541 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1892252082] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 05:09:48,542 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2038120801] [2023-11-19 05:09:48,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:09:48,545 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:09:48,545 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c63e8de8-b99b-44b6-8280-46173e1afc63/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 05:09:48,547 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c63e8de8-b99b-44b6-8280-46173e1afc63/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 05:09:48,579 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c63e8de8-b99b-44b6-8280-46173e1afc63/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-19 05:09:48,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:09:49,008 INFO L262 TraceCheckSpWp]: Trace formula consists of 1822 conjuncts, 63 conjunts are in the unsatisfiable core [2023-11-19 05:09:49,026 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 05:09:50,341 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-11-19 05:09:50,342 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 05:09:50,342 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2038120801] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:09:50,342 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-19 05:09:50,343 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [16] total 24 [2023-11-19 05:09:50,343 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [722096698] [2023-11-19 05:09:50,343 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:09:50,344 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-19 05:09:50,344 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:09:50,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-19 05:09:50,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=491, Unknown=0, NotChecked=0, Total=552 [2023-11-19 05:09:50,346 INFO L87 Difference]: Start difference. First operand 795 states and 1255 transitions. Second operand has 10 states, 6 states have (on average 9.333333333333334) internal successors, (56), 8 states have internal predecessors, (56), 6 states have call successors, (20), 3 states have call predecessors, (20), 4 states have return successors, (19), 5 states have call predecessors, (19), 5 states have call successors, (19) [2023-11-19 05:09:53,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:09:53,204 INFO L93 Difference]: Finished difference Result 1557 states and 2473 transitions. [2023-11-19 05:09:53,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-19 05:09:53,205 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 6 states have (on average 9.333333333333334) internal successors, (56), 8 states have internal predecessors, (56), 6 states have call successors, (20), 3 states have call predecessors, (20), 4 states have return successors, (19), 5 states have call predecessors, (19), 5 states have call successors, (19) Word has length 105 [2023-11-19 05:09:53,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:09:53,215 INFO L225 Difference]: With dead ends: 1557 [2023-11-19 05:09:53,215 INFO L226 Difference]: Without dead ends: 785 [2023-11-19 05:09:53,223 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=103, Invalid=827, Unknown=0, NotChecked=0, Total=930 [2023-11-19 05:09:53,229 INFO L413 NwaCegarLoop]: 222 mSDtfsCounter, 783 mSDsluCounter, 920 mSDsCounter, 0 mSdLazyCounter, 3116 mSolverCounterSat, 381 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 783 SdHoareTripleChecker+Valid, 1142 SdHoareTripleChecker+Invalid, 3497 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 381 IncrementalHoareTripleChecker+Valid, 3116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2023-11-19 05:09:53,229 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [783 Valid, 1142 Invalid, 3497 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [381 Valid, 3116 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2023-11-19 05:09:53,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 785 states. [2023-11-19 05:09:53,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 785 to 785. [2023-11-19 05:09:53,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 785 states, 538 states have (on average 1.5594795539033457) internal successors, (839), 570 states have internal predecessors, (839), 197 states have call successors, (197), 49 states have call predecessors, (197), 49 states have return successors, (199), 190 states have call predecessors, (199), 193 states have call successors, (199) [2023-11-19 05:09:53,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 785 states to 785 states and 1235 transitions. [2023-11-19 05:09:53,310 INFO L78 Accepts]: Start accepts. Automaton has 785 states and 1235 transitions. Word has length 105 [2023-11-19 05:09:53,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:09:53,312 INFO L495 AbstractCegarLoop]: Abstraction has 785 states and 1235 transitions. [2023-11-19 05:09:53,312 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 6 states have (on average 9.333333333333334) internal successors, (56), 8 states have internal predecessors, (56), 6 states have call successors, (20), 3 states have call predecessors, (20), 4 states have return successors, (19), 5 states have call predecessors, (19), 5 states have call successors, (19) [2023-11-19 05:09:53,313 INFO L276 IsEmpty]: Start isEmpty. Operand 785 states and 1235 transitions. [2023-11-19 05:09:53,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2023-11-19 05:09:53,317 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:09:53,317 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:09:53,347 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c63e8de8-b99b-44b6-8280-46173e1afc63/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-11-19 05:09:53,531 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c63e8de8-b99b-44b6-8280-46173e1afc63/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:09:53,531 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:09:53,532 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:09:53,532 INFO L85 PathProgramCache]: Analyzing trace with hash -325148087, now seen corresponding path program 1 times [2023-11-19 05:09:53,532 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:09:53,533 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [105540730] [2023-11-19 05:09:53,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:09:53,533 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:09:53,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:09:55,334 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-11-19 05:09:55,335 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:09:55,336 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [105540730] [2023-11-19 05:09:55,336 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [105540730] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:09:55,336 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 05:09:55,336 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2023-11-19 05:09:55,337 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1037513504] [2023-11-19 05:09:55,337 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:09:55,338 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-19 05:09:55,338 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:09:55,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-19 05:09:55,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2023-11-19 05:09:55,340 INFO L87 Difference]: Start difference. First operand 785 states and 1235 transitions. Second operand has 14 states, 11 states have (on average 5.363636363636363) internal successors, (59), 12 states have internal predecessors, (59), 6 states have call successors, (20), 4 states have call predecessors, (20), 6 states have return successors, (19), 8 states have call predecessors, (19), 5 states have call successors, (19) [2023-11-19 05:10:03,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:10:03,242 INFO L93 Difference]: Finished difference Result 2989 states and 4763 transitions. [2023-11-19 05:10:03,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-11-19 05:10:03,243 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 11 states have (on average 5.363636363636363) internal successors, (59), 12 states have internal predecessors, (59), 6 states have call successors, (20), 4 states have call predecessors, (20), 6 states have return successors, (19), 8 states have call predecessors, (19), 5 states have call successors, (19) Word has length 106 [2023-11-19 05:10:03,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:10:03,262 INFO L225 Difference]: With dead ends: 2989 [2023-11-19 05:10:03,263 INFO L226 Difference]: Without dead ends: 1689 [2023-11-19 05:10:03,269 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=216, Invalid=654, Unknown=0, NotChecked=0, Total=870 [2023-11-19 05:10:03,272 INFO L413 NwaCegarLoop]: 607 mSDtfsCounter, 3495 mSDsluCounter, 2420 mSDsCounter, 0 mSdLazyCounter, 8879 mSolverCounterSat, 1568 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3573 SdHoareTripleChecker+Valid, 3027 SdHoareTripleChecker+Invalid, 10447 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1568 IncrementalHoareTripleChecker+Valid, 8879 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.1s IncrementalHoareTripleChecker+Time [2023-11-19 05:10:03,273 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3573 Valid, 3027 Invalid, 10447 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1568 Valid, 8879 Invalid, 0 Unknown, 0 Unchecked, 7.1s Time] [2023-11-19 05:10:03,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1689 states. [2023-11-19 05:10:03,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1689 to 1611. [2023-11-19 05:10:03,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1611 states, 1114 states have (on average 1.566427289048474) internal successors, (1745), 1176 states have internal predecessors, (1745), 400 states have call successors, (400), 93 states have call predecessors, (400), 96 states have return successors, (415), 390 states have call predecessors, (415), 396 states have call successors, (415) [2023-11-19 05:10:03,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1611 states to 1611 states and 2560 transitions. [2023-11-19 05:10:03,452 INFO L78 Accepts]: Start accepts. Automaton has 1611 states and 2560 transitions. Word has length 106 [2023-11-19 05:10:03,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:10:03,453 INFO L495 AbstractCegarLoop]: Abstraction has 1611 states and 2560 transitions. [2023-11-19 05:10:03,453 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 11 states have (on average 5.363636363636363) internal successors, (59), 12 states have internal predecessors, (59), 6 states have call successors, (20), 4 states have call predecessors, (20), 6 states have return successors, (19), 8 states have call predecessors, (19), 5 states have call successors, (19) [2023-11-19 05:10:03,453 INFO L276 IsEmpty]: Start isEmpty. Operand 1611 states and 2560 transitions. [2023-11-19 05:10:03,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2023-11-19 05:10:03,457 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:10:03,458 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:10:03,458 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-19 05:10:03,458 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:10:03,459 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:10:03,459 INFO L85 PathProgramCache]: Analyzing trace with hash 430785899, now seen corresponding path program 1 times [2023-11-19 05:10:03,459 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:10:03,459 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2018008833] [2023-11-19 05:10:03,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:10:03,460 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:10:03,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:10:03,765 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-11-19 05:10:03,766 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:10:03,766 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2018008833] [2023-11-19 05:10:03,766 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2018008833] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:10:03,766 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 05:10:03,767 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-19 05:10:03,767 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1828678571] [2023-11-19 05:10:03,769 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:10:03,769 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-19 05:10:03,770 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:10:03,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-19 05:10:03,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-19 05:10:03,771 INFO L87 Difference]: Start difference. First operand 1611 states and 2560 transitions. Second operand has 5 states, 5 states have (on average 11.6) internal successors, (58), 5 states have internal predecessors, (58), 4 states have call successors, (20), 3 states have call predecessors, (20), 3 states have return successors, (19), 4 states have call predecessors, (19), 3 states have call successors, (19) [2023-11-19 05:10:06,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:10:06,321 INFO L93 Difference]: Finished difference Result 5747 states and 9370 transitions. [2023-11-19 05:10:06,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-19 05:10:06,322 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.6) internal successors, (58), 5 states have internal predecessors, (58), 4 states have call successors, (20), 3 states have call predecessors, (20), 3 states have return successors, (19), 4 states have call predecessors, (19), 3 states have call successors, (19) Word has length 107 [2023-11-19 05:10:06,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:10:06,366 INFO L225 Difference]: With dead ends: 5747 [2023-11-19 05:10:06,366 INFO L226 Difference]: Without dead ends: 4167 [2023-11-19 05:10:06,379 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-11-19 05:10:06,380 INFO L413 NwaCegarLoop]: 340 mSDtfsCounter, 1403 mSDsluCounter, 543 mSDsCounter, 0 mSdLazyCounter, 1802 mSolverCounterSat, 503 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1470 SdHoareTripleChecker+Valid, 883 SdHoareTripleChecker+Invalid, 2305 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 503 IncrementalHoareTripleChecker+Valid, 1802 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2023-11-19 05:10:06,381 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1470 Valid, 883 Invalid, 2305 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [503 Valid, 1802 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2023-11-19 05:10:06,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4167 states. [2023-11-19 05:10:06,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4167 to 3672. [2023-11-19 05:10:06,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3672 states, 2620 states have (on average 1.584351145038168) internal successors, (4151), 2750 states have internal predecessors, (4151), 835 states have call successors, (835), 207 states have call predecessors, (835), 216 states have return successors, (935), 787 states have call predecessors, (935), 831 states have call successors, (935) [2023-11-19 05:10:06,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3672 states to 3672 states and 5921 transitions. [2023-11-19 05:10:06,959 INFO L78 Accepts]: Start accepts. Automaton has 3672 states and 5921 transitions. Word has length 107 [2023-11-19 05:10:06,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:10:06,960 INFO L495 AbstractCegarLoop]: Abstraction has 3672 states and 5921 transitions. [2023-11-19 05:10:06,960 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.6) internal successors, (58), 5 states have internal predecessors, (58), 4 states have call successors, (20), 3 states have call predecessors, (20), 3 states have return successors, (19), 4 states have call predecessors, (19), 3 states have call successors, (19) [2023-11-19 05:10:06,960 INFO L276 IsEmpty]: Start isEmpty. Operand 3672 states and 5921 transitions. [2023-11-19 05:10:06,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2023-11-19 05:10:06,967 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:10:06,967 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:10:06,967 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-19 05:10:06,968 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:10:06,968 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:10:06,968 INFO L85 PathProgramCache]: Analyzing trace with hash -1634046789, now seen corresponding path program 1 times [2023-11-19 05:10:06,968 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:10:06,969 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [74928457] [2023-11-19 05:10:06,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:10:06,969 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:10:07,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:10:12,108 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-11-19 05:10:12,108 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:10:12,108 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [74928457] [2023-11-19 05:10:12,109 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [74928457] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 05:10:12,109 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1656336242] [2023-11-19 05:10:12,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:10:12,109 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:10:12,110 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c63e8de8-b99b-44b6-8280-46173e1afc63/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 05:10:12,111 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c63e8de8-b99b-44b6-8280-46173e1afc63/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 05:10:12,135 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c63e8de8-b99b-44b6-8280-46173e1afc63/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-19 05:10:12,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:10:12,645 INFO L262 TraceCheckSpWp]: Trace formula consists of 1841 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-19 05:10:12,656 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 05:10:12,763 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2023-11-19 05:10:12,764 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 05:10:12,764 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1656336242] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:10:12,764 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-19 05:10:12,765 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [30] total 32 [2023-11-19 05:10:12,765 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [508197706] [2023-11-19 05:10:12,765 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:10:12,766 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 05:10:12,766 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:10:12,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 05:10:12,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=905, Unknown=0, NotChecked=0, Total=992 [2023-11-19 05:10:12,768 INFO L87 Difference]: Start difference. First operand 3672 states and 5921 transitions. Second operand has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 2 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (20), 2 states have call predecessors, (20), 1 states have call successors, (20)