./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/elevator_spec1_product09.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 30e01a73 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19eff2a5-ec46-4e56-b447-f3c6a4e0140d/bin/utaipan-verify-mE87zJ7Ire/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19eff2a5-ec46-4e56-b447-f3c6a4e0140d/bin/utaipan-verify-mE87zJ7Ire/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19eff2a5-ec46-4e56-b447-f3c6a4e0140d/bin/utaipan-verify-mE87zJ7Ire/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19eff2a5-ec46-4e56-b447-f3c6a4e0140d/bin/utaipan-verify-mE87zJ7Ire/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec1_product09.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19eff2a5-ec46-4e56-b447-f3c6a4e0140d/bin/utaipan-verify-mE87zJ7Ire/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19eff2a5-ec46-4e56-b447-f3c6a4e0140d/bin/utaipan-verify-mE87zJ7Ire --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 e76bca30ba241523f00afb0ea64acdcdd753d47014073d825a6028b49fb542a9 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-30e01a7 [2023-11-23 21:22:26,670 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-23 21:22:26,805 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19eff2a5-ec46-4e56-b447-f3c6a4e0140d/bin/utaipan-verify-mE87zJ7Ire/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-11-23 21:22:26,817 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-23 21:22:26,818 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-23 21:22:26,860 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-23 21:22:26,861 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-23 21:22:26,862 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-23 21:22:26,863 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-23 21:22:26,869 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-23 21:22:26,869 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-23 21:22:26,870 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-23 21:22:26,871 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-23 21:22:26,873 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-23 21:22:26,873 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-23 21:22:26,874 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-23 21:22:26,874 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-23 21:22:26,875 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-23 21:22:26,876 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-23 21:22:26,876 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-23 21:22:26,877 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-23 21:22:26,877 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-23 21:22:26,879 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-23 21:22:26,879 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-23 21:22:26,880 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-23 21:22:26,880 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-23 21:22:26,881 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-23 21:22:26,881 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-23 21:22:26,882 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-23 21:22:26,882 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-23 21:22:26,884 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-23 21:22:26,884 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-23 21:22:26,885 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-23 21:22:26,885 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-23 21:22:26,885 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-23 21:22:26,886 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-23 21:22:26,886 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-23 21:22:26,886 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 21:22:26,887 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-23 21:22:26,887 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-23 21:22:26,887 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-23 21:22:26,888 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-23 21:22:26,888 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-23 21:22:26,889 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-23 21:22:26,889 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-23 21:22:26,890 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-23 21:22:26,890 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-23 21:22:26,890 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_19eff2a5-ec46-4e56-b447-f3c6a4e0140d/bin/utaipan-verify-mE87zJ7Ire/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19eff2a5-ec46-4e56-b447-f3c6a4e0140d/bin/utaipan-verify-mE87zJ7Ire Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e76bca30ba241523f00afb0ea64acdcdd753d47014073d825a6028b49fb542a9 [2023-11-23 21:22:27,234 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-23 21:22:27,266 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-23 21:22:27,269 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-23 21:22:27,271 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-23 21:22:27,272 INFO L274 PluginConnector]: CDTParser initialized [2023-11-23 21:22:27,273 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19eff2a5-ec46-4e56-b447-f3c6a4e0140d/bin/utaipan-verify-mE87zJ7Ire/../../sv-benchmarks/c/product-lines/elevator_spec1_product09.cil.c [2023-11-23 21:22:30,484 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-23 21:22:30,942 INFO L384 CDTParser]: Found 1 translation units. [2023-11-23 21:22:30,943 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19eff2a5-ec46-4e56-b447-f3c6a4e0140d/sv-benchmarks/c/product-lines/elevator_spec1_product09.cil.c [2023-11-23 21:22:30,968 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19eff2a5-ec46-4e56-b447-f3c6a4e0140d/bin/utaipan-verify-mE87zJ7Ire/data/2da49c411/097142f4fb4b4f72a769d619d5bfcf00/FLAG12ed05a5f [2023-11-23 21:22:30,985 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19eff2a5-ec46-4e56-b447-f3c6a4e0140d/bin/utaipan-verify-mE87zJ7Ire/data/2da49c411/097142f4fb4b4f72a769d619d5bfcf00 [2023-11-23 21:22:30,992 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-23 21:22:30,993 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-23 21:22:30,994 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-23 21:22:30,995 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-23 21:22:31,000 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-23 21:22:31,001 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 09:22:30" (1/1) ... [2023-11-23 21:22:31,002 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@c3f4404 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:22:31, skipping insertion in model container [2023-11-23 21:22:31,003 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 09:22:30" (1/1) ... [2023-11-23 21:22:31,102 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-23 21:22:31,325 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_19eff2a5-ec46-4e56-b447-f3c6a4e0140d/sv-benchmarks/c/product-lines/elevator_spec1_product09.cil.c[1545,1558] [2023-11-23 21:22:31,831 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 21:22:31,845 INFO L202 MainTranslator]: Completed pre-run [2023-11-23 21:22:31,856 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"wsllib_check.i","") [48] [2023-11-23 21:22:31,858 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"libacc.i","") [57] [2023-11-23 21:22:31,859 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"featureselect.i","") [423] [2023-11-23 21:22:31,859 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Test.i","") [461] [2023-11-23 21:22:31,859 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Specification1_spec.i","") [822] [2023-11-23 21:22:31,860 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"UnitTests.i","") [1005] [2023-11-23 21:22:31,860 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Floor.i","") [1097] [2023-11-23 21:22:31,860 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Elevator.i","") [1768] [2023-11-23 21:22:31,861 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"scenario.i","") [3206] [2023-11-23 21:22:31,861 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Person.i","") [3219] [2023-11-23 21:22:31,864 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_19eff2a5-ec46-4e56-b447-f3c6a4e0140d/sv-benchmarks/c/product-lines/elevator_spec1_product09.cil.c[1545,1558] [2023-11-23 21:22:32,012 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 21:22:32,054 INFO L206 MainTranslator]: Completed translation [2023-11-23 21:22:32,055 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:22:32 WrapperNode [2023-11-23 21:22:32,056 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-23 21:22:32,057 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-23 21:22:32,057 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-23 21:22:32,057 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-23 21:22:32,066 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:22:32" (1/1) ... [2023-11-23 21:22:32,120 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:22:32" (1/1) ... [2023-11-23 21:22:32,199 INFO L138 Inliner]: procedures = 89, calls = 331, calls flagged for inlining = 25, calls inlined = 22, statements flattened = 800 [2023-11-23 21:22:32,199 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-23 21:22:32,200 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-23 21:22:32,200 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-23 21:22:32,200 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-23 21:22:32,227 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:22:32" (1/1) ... [2023-11-23 21:22:32,238 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:22:32" (1/1) ... [2023-11-23 21:22:32,244 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:22:32" (1/1) ... [2023-11-23 21:22:32,244 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:22:32" (1/1) ... [2023-11-23 21:22:32,272 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:22:32" (1/1) ... [2023-11-23 21:22:32,290 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:22:32" (1/1) ... [2023-11-23 21:22:32,295 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:22:32" (1/1) ... [2023-11-23 21:22:32,301 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:22:32" (1/1) ... [2023-11-23 21:22:32,324 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-23 21:22:32,325 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-23 21:22:32,325 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-23 21:22:32,326 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-23 21:22:32,327 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:22:32" (1/1) ... [2023-11-23 21:22:32,333 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 21:22:32,348 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19eff2a5-ec46-4e56-b447-f3c6a4e0140d/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:22:32,362 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19eff2a5-ec46-4e56-b447-f3c6a4e0140d/bin/utaipan-verify-mE87zJ7Ire/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-23 21:22:32,392 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19eff2a5-ec46-4e56-b447-f3c6a4e0140d/bin/utaipan-verify-mE87zJ7Ire/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-23 21:22:32,409 INFO L130 BoogieDeclarations]: Found specification of procedure angelinaCall [2023-11-23 21:22:32,410 INFO L138 BoogieDeclarations]: Found implementation of procedure angelinaCall [2023-11-23 21:22:32,410 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-23 21:22:32,410 INFO L130 BoogieDeclarations]: Found specification of procedure bigMacCall [2023-11-23 21:22:32,410 INFO L138 BoogieDeclarations]: Found implementation of procedure bigMacCall [2023-11-23 21:22:32,411 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2023-11-23 21:22:32,412 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2023-11-23 21:22:32,412 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2023-11-23 21:22:32,412 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2023-11-23 21:22:32,413 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2023-11-23 21:22:32,413 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2023-11-23 21:22:32,413 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2023-11-23 21:22:32,414 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2023-11-23 21:22:32,415 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2023-11-23 21:22:32,415 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2023-11-23 21:22:32,415 INFO L130 BoogieDeclarations]: Found specification of procedure areDoorsOpen [2023-11-23 21:22:32,418 INFO L138 BoogieDeclarations]: Found implementation of procedure areDoorsOpen [2023-11-23 21:22:32,418 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2023-11-23 21:22:32,418 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2023-11-23 21:22:32,419 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2023-11-23 21:22:32,419 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2023-11-23 21:22:32,419 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2023-11-23 21:22:32,419 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2023-11-23 21:22:32,419 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2023-11-23 21:22:32,420 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2023-11-23 21:22:32,421 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2023-11-23 21:22:32,421 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2023-11-23 21:22:32,421 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2023-11-23 21:22:32,421 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2023-11-23 21:22:32,422 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2023-11-23 21:22:32,422 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2023-11-23 21:22:32,422 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2023-11-23 21:22:32,422 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2023-11-23 21:22:32,422 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2023-11-23 21:22:32,422 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2023-11-23 21:22:32,423 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-23 21:22:32,423 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2023-11-23 21:22:32,423 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2023-11-23 21:22:32,423 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2023-11-23 21:22:32,423 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2023-11-23 21:22:32,424 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2023-11-23 21:22:32,424 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2023-11-23 21:22:32,424 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-23 21:22:32,424 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-23 21:22:32,424 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2023-11-23 21:22:32,425 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2023-11-23 21:22:32,631 INFO L241 CfgBuilder]: Building ICFG [2023-11-23 21:22:32,634 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-23 21:22:33,866 INFO L282 CfgBuilder]: Performing block encoding [2023-11-23 21:22:34,864 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-23 21:22:34,865 INFO L309 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-23 21:22:34,867 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 09:22:34 BoogieIcfgContainer [2023-11-23 21:22:34,867 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-23 21:22:34,870 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-23 21:22:34,870 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-23 21:22:34,874 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-23 21:22:34,874 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 09:22:30" (1/3) ... [2023-11-23 21:22:34,876 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@33cc16cd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 09:22:34, skipping insertion in model container [2023-11-23 21:22:34,876 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:22:32" (2/3) ... [2023-11-23 21:22:34,878 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@33cc16cd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 09:22:34, skipping insertion in model container [2023-11-23 21:22:34,879 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 09:22:34" (3/3) ... [2023-11-23 21:22:34,880 INFO L112 eAbstractionObserver]: Analyzing ICFG elevator_spec1_product09.cil.c [2023-11-23 21:22:34,900 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-23 21:22:34,900 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-23 21:22:34,982 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-23 21:22:34,989 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;@34124b4c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-23 21:22:34,990 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-23 21:22:34,998 INFO L276 IsEmpty]: Start isEmpty. Operand has 348 states, 236 states have (on average 1.6228813559322033) internal successors, (383), 257 states have internal predecessors, (383), 89 states have call successors, (89), 21 states have call predecessors, (89), 21 states have return successors, (89), 83 states have call predecessors, (89), 89 states have call successors, (89) [2023-11-23 21:22:35,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2023-11-23 21:22:35,034 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:22:35,035 INFO L195 NwaCegarLoop]: 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:22:35,036 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:22:35,044 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:22:35,045 INFO L85 PathProgramCache]: Analyzing trace with hash 409763476, now seen corresponding path program 1 times [2023-11-23 21:22:35,056 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:22:35,057 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1695810783] [2023-11-23 21:22:35,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:22:35,058 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:22:35,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:22:36,152 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-23 21:22:36,153 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:22:36,153 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1695810783] [2023-11-23 21:22:36,154 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1695810783] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:22:36,155 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:22:36,155 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-23 21:22:36,159 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [731343018] [2023-11-23 21:22:36,160 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:22:36,165 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-23 21:22:36,166 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:22:36,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-23 21:22:36,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-23 21:22:36,206 INFO L87 Difference]: Start difference. First operand has 348 states, 236 states have (on average 1.6228813559322033) internal successors, (383), 257 states have internal predecessors, (383), 89 states have call successors, (89), 21 states have call predecessors, (89), 21 states have return successors, (89), 83 states have call predecessors, (89), 89 states have call successors, (89) Second operand has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 7 states have internal predecessors, (37), 5 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 5 states have call predecessors, (11), 4 states have call successors, (11) [2023-11-23 21:22:38,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:22:38,997 INFO L93 Difference]: Finished difference Result 1159 states and 1908 transitions. [2023-11-23 21:22:38,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-23 21:22:39,000 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 7 states have internal predecessors, (37), 5 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 5 states have call predecessors, (11), 4 states have call successors, (11) Word has length 62 [2023-11-23 21:22:39,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:22:39,027 INFO L225 Difference]: With dead ends: 1159 [2023-11-23 21:22:39,027 INFO L226 Difference]: Without dead ends: 828 [2023-11-23 21:22:39,038 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=67, Invalid=173, Unknown=0, NotChecked=0, Total=240 [2023-11-23 21:22:39,042 INFO L413 NwaCegarLoop]: 376 mSDtfsCounter, 1625 mSDsluCounter, 1272 mSDsCounter, 0 mSdLazyCounter, 2249 mSolverCounterSat, 479 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1686 SdHoareTripleChecker+Valid, 1648 SdHoareTripleChecker+Invalid, 2728 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 479 IncrementalHoareTripleChecker+Valid, 2249 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2023-11-23 21:22:39,043 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1686 Valid, 1648 Invalid, 2728 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [479 Valid, 2249 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2023-11-23 21:22:39,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 828 states. [2023-11-23 21:22:39,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 828 to 779. [2023-11-23 21:22:39,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 779 states, 552 states have (on average 1.6431159420289856) internal successors, (907), 587 states have internal predecessors, (907), 184 states have call successors, (184), 40 states have call predecessors, (184), 42 states have return successors, (185), 176 states have call predecessors, (185), 179 states have call successors, (185) [2023-11-23 21:22:39,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 779 states to 779 states and 1276 transitions. [2023-11-23 21:22:39,232 INFO L78 Accepts]: Start accepts. Automaton has 779 states and 1276 transitions. Word has length 62 [2023-11-23 21:22:39,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:22:39,232 INFO L495 AbstractCegarLoop]: Abstraction has 779 states and 1276 transitions. [2023-11-23 21:22:39,233 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 7 states have internal predecessors, (37), 5 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 5 states have call predecessors, (11), 4 states have call successors, (11) [2023-11-23 21:22:39,233 INFO L276 IsEmpty]: Start isEmpty. Operand 779 states and 1276 transitions. [2023-11-23 21:22:39,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2023-11-23 21:22:39,238 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:22:39,239 INFO L195 NwaCegarLoop]: 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:22:39,239 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-23 21:22:39,239 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:22:39,240 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:22:39,240 INFO L85 PathProgramCache]: Analyzing trace with hash 1981387559, now seen corresponding path program 1 times [2023-11-23 21:22:39,240 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:22:39,240 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1088299396] [2023-11-23 21:22:39,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:22:39,241 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:22:39,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:22:39,565 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-23 21:22:39,565 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:22:39,566 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1088299396] [2023-11-23 21:22:39,566 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1088299396] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:22:39,567 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:22:39,567 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-23 21:22:39,567 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [198493063] [2023-11-23 21:22:39,567 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:22:39,570 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-23 21:22:39,571 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:22:39,573 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-23 21:22:39,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-23 21:22:39,576 INFO L87 Difference]: Start difference. First operand 779 states and 1276 transitions. Second operand has 5 states, 5 states have (on average 8.0) internal successors, (40), 4 states have internal predecessors, (40), 2 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (12), 3 states have call predecessors, (12), 2 states have call successors, (12) [2023-11-23 21:22:39,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:22:39,838 INFO L93 Difference]: Finished difference Result 1309 states and 2151 transitions. [2023-11-23 21:22:39,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-23 21:22:39,839 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.0) internal successors, (40), 4 states have internal predecessors, (40), 2 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (12), 3 states have call predecessors, (12), 2 states have call successors, (12) Word has length 67 [2023-11-23 21:22:39,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:22:39,851 INFO L225 Difference]: With dead ends: 1309 [2023-11-23 21:22:39,851 INFO L226 Difference]: Without dead ends: 849 [2023-11-23 21:22:39,863 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-23 21:22:39,870 INFO L413 NwaCegarLoop]: 562 mSDtfsCounter, 41 mSDsluCounter, 1617 mSDsCounter, 0 mSdLazyCounter, 156 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 2179 SdHoareTripleChecker+Invalid, 158 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 156 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-23 21:22:39,872 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 2179 Invalid, 158 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 156 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-23 21:22:39,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 849 states. [2023-11-23 21:22:39,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 849 to 791. [2023-11-23 21:22:39,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 791 states, 561 states have (on average 1.6327985739750446) internal successors, (916), 596 states have internal predecessors, (916), 184 states have call successors, (184), 40 states have call predecessors, (184), 45 states have return successors, (191), 179 states have call predecessors, (191), 179 states have call successors, (191) [2023-11-23 21:22:39,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 791 states to 791 states and 1291 transitions. [2023-11-23 21:22:39,961 INFO L78 Accepts]: Start accepts. Automaton has 791 states and 1291 transitions. Word has length 67 [2023-11-23 21:22:39,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:22:39,962 INFO L495 AbstractCegarLoop]: Abstraction has 791 states and 1291 transitions. [2023-11-23 21:22:39,962 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.0) internal successors, (40), 4 states have internal predecessors, (40), 2 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (12), 3 states have call predecessors, (12), 2 states have call successors, (12) [2023-11-23 21:22:39,962 INFO L276 IsEmpty]: Start isEmpty. Operand 791 states and 1291 transitions. [2023-11-23 21:22:39,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2023-11-23 21:22:39,965 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:22:39,966 INFO L195 NwaCegarLoop]: 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:22:39,966 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-23 21:22:39,966 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:22:39,966 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:22:39,967 INFO L85 PathProgramCache]: Analyzing trace with hash 1115116687, now seen corresponding path program 1 times [2023-11-23 21:22:39,967 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:22:39,967 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1625558488] [2023-11-23 21:22:39,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:22:39,968 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:22:40,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:22:40,401 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-23 21:22:40,401 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:22:40,402 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1625558488] [2023-11-23 21:22:40,402 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1625558488] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:22:40,402 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:22:40,402 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-23 21:22:40,403 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1536092] [2023-11-23 21:22:40,403 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:22:40,404 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-23 21:22:40,404 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:22:40,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-23 21:22:40,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-11-23 21:22:40,406 INFO L87 Difference]: Start difference. First operand 791 states and 1291 transitions. Second operand has 8 states, 8 states have (on average 5.5) internal successors, (44), 8 states have internal predecessors, (44), 6 states have call successors, (13), 4 states have call predecessors, (13), 3 states have return successors, (12), 6 states have call predecessors, (12), 5 states have call successors, (12) [2023-11-23 21:22:42,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:22:42,575 INFO L93 Difference]: Finished difference Result 1798 states and 2930 transitions. [2023-11-23 21:22:42,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-23 21:22:42,576 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.5) internal successors, (44), 8 states have internal predecessors, (44), 6 states have call successors, (13), 4 states have call predecessors, (13), 3 states have return successors, (12), 6 states have call predecessors, (12), 5 states have call successors, (12) Word has length 71 [2023-11-23 21:22:42,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:22:42,589 INFO L225 Difference]: With dead ends: 1798 [2023-11-23 21:22:42,589 INFO L226 Difference]: Without dead ends: 1230 [2023-11-23 21:22:42,595 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2023-11-23 21:22:42,600 INFO L413 NwaCegarLoop]: 475 mSDtfsCounter, 1606 mSDsluCounter, 943 mSDsCounter, 0 mSdLazyCounter, 2189 mSolverCounterSat, 602 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1749 SdHoareTripleChecker+Valid, 1418 SdHoareTripleChecker+Invalid, 2791 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 602 IncrementalHoareTripleChecker+Valid, 2189 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2023-11-23 21:22:42,602 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1749 Valid, 1418 Invalid, 2791 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [602 Valid, 2189 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2023-11-23 21:22:42,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1230 states. [2023-11-23 21:22:42,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1230 to 1136. [2023-11-23 21:22:42,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1136 states, 794 states have (on average 1.5881612090680102) internal successors, (1261), 846 states have internal predecessors, (1261), 270 states have call successors, (270), 63 states have call predecessors, (270), 71 states have return successors, (286), 263 states have call predecessors, (286), 265 states have call successors, (286) [2023-11-23 21:22:42,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1136 states to 1136 states and 1817 transitions. [2023-11-23 21:22:42,728 INFO L78 Accepts]: Start accepts. Automaton has 1136 states and 1817 transitions. Word has length 71 [2023-11-23 21:22:42,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:22:42,729 INFO L495 AbstractCegarLoop]: Abstraction has 1136 states and 1817 transitions. [2023-11-23 21:22:42,729 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.5) internal successors, (44), 8 states have internal predecessors, (44), 6 states have call successors, (13), 4 states have call predecessors, (13), 3 states have return successors, (12), 6 states have call predecessors, (12), 5 states have call successors, (12) [2023-11-23 21:22:42,729 INFO L276 IsEmpty]: Start isEmpty. Operand 1136 states and 1817 transitions. [2023-11-23 21:22:42,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2023-11-23 21:22:42,731 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:22:42,732 INFO L195 NwaCegarLoop]: 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:22:42,732 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-23 21:22:42,732 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:22:42,732 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:22:42,733 INFO L85 PathProgramCache]: Analyzing trace with hash -1656245693, now seen corresponding path program 1 times [2023-11-23 21:22:42,733 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:22:42,733 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1115054972] [2023-11-23 21:22:42,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:22:42,733 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:22:42,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:22:42,960 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-23 21:22:42,961 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:22:42,961 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1115054972] [2023-11-23 21:22:42,961 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1115054972] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:22:42,961 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:22:42,961 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-23 21:22:42,962 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [219457231] [2023-11-23 21:22:42,962 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:22:42,962 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-23 21:22:42,962 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:22:42,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-23 21:22:42,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-23 21:22:42,968 INFO L87 Difference]: Start difference. First operand 1136 states and 1817 transitions. Second operand has 4 states, 4 states have (on average 11.75) internal successors, (47), 4 states have internal predecessors, (47), 3 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2023-11-23 21:22:43,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:22:43,308 INFO L93 Difference]: Finished difference Result 2193 states and 3564 transitions. [2023-11-23 21:22:43,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-23 21:22:43,308 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.75) internal successors, (47), 4 states have internal predecessors, (47), 3 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) Word has length 74 [2023-11-23 21:22:43,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:22:43,321 INFO L225 Difference]: With dead ends: 2193 [2023-11-23 21:22:43,321 INFO L226 Difference]: Without dead ends: 1136 [2023-11-23 21:22:43,330 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-23 21:22:43,336 INFO L413 NwaCegarLoop]: 545 mSDtfsCounter, 210 mSDsluCounter, 862 mSDsCounter, 0 mSdLazyCounter, 146 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 220 SdHoareTripleChecker+Valid, 1407 SdHoareTripleChecker+Invalid, 164 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 146 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-23 21:22:43,337 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [220 Valid, 1407 Invalid, 164 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 146 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-23 21:22:43,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1136 states. [2023-11-23 21:22:43,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1136 to 1136. [2023-11-23 21:22:43,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1136 states, 794 states have (on average 1.5478589420654911) internal successors, (1229), 846 states have internal predecessors, (1229), 270 states have call successors, (270), 63 states have call predecessors, (270), 71 states have return successors, (286), 263 states have call predecessors, (286), 265 states have call successors, (286) [2023-11-23 21:22:43,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1136 states to 1136 states and 1785 transitions. [2023-11-23 21:22:43,476 INFO L78 Accepts]: Start accepts. Automaton has 1136 states and 1785 transitions. Word has length 74 [2023-11-23 21:22:43,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:22:43,476 INFO L495 AbstractCegarLoop]: Abstraction has 1136 states and 1785 transitions. [2023-11-23 21:22:43,477 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.75) internal successors, (47), 4 states have internal predecessors, (47), 3 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2023-11-23 21:22:43,477 INFO L276 IsEmpty]: Start isEmpty. Operand 1136 states and 1785 transitions. [2023-11-23 21:22:43,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2023-11-23 21:22:43,481 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:22:43,481 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-11-23 21:22:43,482 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-23 21:22:43,482 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:22:43,482 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:22:43,482 INFO L85 PathProgramCache]: Analyzing trace with hash -276188426, now seen corresponding path program 1 times [2023-11-23 21:22:43,483 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:22:43,483 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1751015072] [2023-11-23 21:22:43,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:22:43,483 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:22:43,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:22:43,915 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-23 21:22:43,915 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:22:43,915 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1751015072] [2023-11-23 21:22:43,915 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1751015072] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:22:43,915 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:22:43,915 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-23 21:22:43,917 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [914623210] [2023-11-23 21:22:43,920 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:22:43,921 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-23 21:22:43,921 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:22:43,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-23 21:22:43,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-23 21:22:43,922 INFO L87 Difference]: Start difference. First operand 1136 states and 1785 transitions. Second operand has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 7 states have internal predecessors, (46), 4 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (13), 5 states have call predecessors, (13), 3 states have call successors, (13) [2023-11-23 21:22:45,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:22:45,931 INFO L93 Difference]: Finished difference Result 2180 states and 3442 transitions. [2023-11-23 21:22:45,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-23 21:22:45,932 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 7 states have internal predecessors, (46), 4 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (13), 5 states have call predecessors, (13), 3 states have call successors, (13) Word has length 76 [2023-11-23 21:22:45,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:22:45,944 INFO L225 Difference]: With dead ends: 2180 [2023-11-23 21:22:45,944 INFO L226 Difference]: Without dead ends: 1324 [2023-11-23 21:22:45,949 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 [2023-11-23 21:22:45,952 INFO L413 NwaCegarLoop]: 353 mSDtfsCounter, 912 mSDsluCounter, 1158 mSDsCounter, 0 mSdLazyCounter, 2022 mSolverCounterSat, 367 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 980 SdHoareTripleChecker+Valid, 1511 SdHoareTripleChecker+Invalid, 2389 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 367 IncrementalHoareTripleChecker+Valid, 2022 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2023-11-23 21:22:45,952 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [980 Valid, 1511 Invalid, 2389 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [367 Valid, 2022 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2023-11-23 21:22:45,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1324 states. [2023-11-23 21:22:46,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1324 to 1163. [2023-11-23 21:22:46,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1163 states, 812 states have (on average 1.54064039408867) internal successors, (1251), 868 states have internal predecessors, (1251), 271 states have call successors, (271), 68 states have call predecessors, (271), 79 states have return successors, (297), 263 states have call predecessors, (297), 266 states have call successors, (297) [2023-11-23 21:22:46,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1163 states to 1163 states and 1819 transitions. [2023-11-23 21:22:46,056 INFO L78 Accepts]: Start accepts. Automaton has 1163 states and 1819 transitions. Word has length 76 [2023-11-23 21:22:46,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:22:46,059 INFO L495 AbstractCegarLoop]: Abstraction has 1163 states and 1819 transitions. [2023-11-23 21:22:46,060 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 7 states have internal predecessors, (46), 4 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (13), 5 states have call predecessors, (13), 3 states have call successors, (13) [2023-11-23 21:22:46,060 INFO L276 IsEmpty]: Start isEmpty. Operand 1163 states and 1819 transitions. [2023-11-23 21:22:46,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2023-11-23 21:22:46,063 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:22:46,063 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-11-23 21:22:46,063 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-23 21:22:46,063 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:22:46,065 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:22:46,065 INFO L85 PathProgramCache]: Analyzing trace with hash 560507650, now seen corresponding path program 1 times [2023-11-23 21:22:46,065 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:22:46,065 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1605602169] [2023-11-23 21:22:46,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:22:46,066 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:22:46,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:22:46,457 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-11-23 21:22:46,457 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:22:46,457 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1605602169] [2023-11-23 21:22:46,458 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1605602169] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:22:46,458 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:22:46,458 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-23 21:22:46,458 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1041746090] [2023-11-23 21:22:46,458 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:22:46,460 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-23 21:22:46,460 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:22:46,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-23 21:22:46,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-23 21:22:46,461 INFO L87 Difference]: Start difference. First operand 1163 states and 1819 transitions. Second operand has 6 states, 6 states have (on average 7.833333333333333) internal successors, (47), 6 states have internal predecessors, (47), 3 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 3 states have call predecessors, (14), 2 states have call successors, (14) [2023-11-23 21:22:47,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:22:47,012 INFO L93 Difference]: Finished difference Result 1235 states and 1932 transitions. [2023-11-23 21:22:47,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-23 21:22:47,013 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.833333333333333) internal successors, (47), 6 states have internal predecessors, (47), 3 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 3 states have call predecessors, (14), 2 states have call successors, (14) Word has length 80 [2023-11-23 21:22:47,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:22:47,026 INFO L225 Difference]: With dead ends: 1235 [2023-11-23 21:22:47,026 INFO L226 Difference]: Without dead ends: 1220 [2023-11-23 21:22:47,028 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 [2023-11-23 21:22:47,029 INFO L413 NwaCegarLoop]: 501 mSDtfsCounter, 632 mSDsluCounter, 840 mSDsCounter, 0 mSdLazyCounter, 279 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 633 SdHoareTripleChecker+Valid, 1341 SdHoareTripleChecker+Invalid, 301 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 279 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-23 21:22:47,030 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [633 Valid, 1341 Invalid, 301 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 279 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-23 21:22:47,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1220 states. [2023-11-23 21:22:47,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1220 to 1167. [2023-11-23 21:22:47,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1167 states, 816 states have (on average 1.5379901960784315) internal successors, (1255), 872 states have internal predecessors, (1255), 271 states have call successors, (271), 68 states have call predecessors, (271), 79 states have return successors, (297), 263 states have call predecessors, (297), 266 states have call successors, (297) [2023-11-23 21:22:47,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1167 states to 1167 states and 1823 transitions. [2023-11-23 21:22:47,175 INFO L78 Accepts]: Start accepts. Automaton has 1167 states and 1823 transitions. Word has length 80 [2023-11-23 21:22:47,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:22:47,176 INFO L495 AbstractCegarLoop]: Abstraction has 1167 states and 1823 transitions. [2023-11-23 21:22:47,176 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.833333333333333) internal successors, (47), 6 states have internal predecessors, (47), 3 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 3 states have call predecessors, (14), 2 states have call successors, (14) [2023-11-23 21:22:47,176 INFO L276 IsEmpty]: Start isEmpty. Operand 1167 states and 1823 transitions. [2023-11-23 21:22:47,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2023-11-23 21:22:47,183 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:22:47,184 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-11-23 21:22:47,184 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-23 21:22:47,184 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:22:47,185 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:22:47,185 INFO L85 PathProgramCache]: Analyzing trace with hash 994837614, now seen corresponding path program 1 times [2023-11-23 21:22:47,185 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:22:47,185 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [425920299] [2023-11-23 21:22:47,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:22:47,186 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:22:47,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:22:47,539 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-11-23 21:22:47,539 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:22:47,540 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [425920299] [2023-11-23 21:22:47,540 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [425920299] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:22:47,540 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:22:47,540 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-23 21:22:47,540 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [387897659] [2023-11-23 21:22:47,541 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:22:47,541 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-23 21:22:47,541 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:22:47,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-23 21:22:47,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-23 21:22:47,542 INFO L87 Difference]: Start difference. First operand 1167 states and 1823 transitions. Second operand has 7 states, 6 states have (on average 8.333333333333334) internal successors, (50), 6 states have internal predecessors, (50), 4 states have call successors, (16), 2 states have call predecessors, (16), 4 states have return successors, (15), 5 states have call predecessors, (15), 3 states have call successors, (15) [2023-11-23 21:22:47,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:22:47,878 INFO L93 Difference]: Finished difference Result 1186 states and 1847 transitions. [2023-11-23 21:22:47,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-23 21:22:47,879 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 8.333333333333334) internal successors, (50), 6 states have internal predecessors, (50), 4 states have call successors, (16), 2 states have call predecessors, (16), 4 states have return successors, (15), 5 states have call predecessors, (15), 3 states have call successors, (15) Word has length 85 [2023-11-23 21:22:47,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:22:47,890 INFO L225 Difference]: With dead ends: 1186 [2023-11-23 21:22:47,891 INFO L226 Difference]: Without dead ends: 1171 [2023-11-23 21:22:47,892 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2023-11-23 21:22:47,893 INFO L413 NwaCegarLoop]: 498 mSDtfsCounter, 257 mSDsluCounter, 2216 mSDsCounter, 0 mSdLazyCounter, 246 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 264 SdHoareTripleChecker+Valid, 2714 SdHoareTripleChecker+Invalid, 268 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 246 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-23 21:22:47,894 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [264 Valid, 2714 Invalid, 268 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 246 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-23 21:22:47,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1171 states. [2023-11-23 21:22:48,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1171 to 1167. [2023-11-23 21:22:48,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1167 states, 816 states have (on average 1.5343137254901962) internal successors, (1252), 872 states have internal predecessors, (1252), 271 states have call successors, (271), 68 states have call predecessors, (271), 79 states have return successors, (297), 263 states have call predecessors, (297), 266 states have call successors, (297) [2023-11-23 21:22:48,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1167 states to 1167 states and 1820 transitions. [2023-11-23 21:22:48,068 INFO L78 Accepts]: Start accepts. Automaton has 1167 states and 1820 transitions. Word has length 85 [2023-11-23 21:22:48,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:22:48,069 INFO L495 AbstractCegarLoop]: Abstraction has 1167 states and 1820 transitions. [2023-11-23 21:22:48,069 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 8.333333333333334) internal successors, (50), 6 states have internal predecessors, (50), 4 states have call successors, (16), 2 states have call predecessors, (16), 4 states have return successors, (15), 5 states have call predecessors, (15), 3 states have call successors, (15) [2023-11-23 21:22:48,070 INFO L276 IsEmpty]: Start isEmpty. Operand 1167 states and 1820 transitions. [2023-11-23 21:22:48,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2023-11-23 21:22:48,073 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:22:48,073 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-11-23 21:22:48,073 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-23 21:22:48,074 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:22:48,074 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:22:48,074 INFO L85 PathProgramCache]: Analyzing trace with hash -401650962, now seen corresponding path program 1 times [2023-11-23 21:22:48,075 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:22:48,075 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [464314395] [2023-11-23 21:22:48,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:22:48,075 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:22:48,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:22:50,227 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-23 21:22:50,228 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:22:50,228 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [464314395] [2023-11-23 21:22:50,228 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [464314395] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:22:50,228 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:22:50,229 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2023-11-23 21:22:50,229 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1901153763] [2023-11-23 21:22:50,229 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:22:50,230 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-11-23 21:22:50,230 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:22:50,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-11-23 21:22:50,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2023-11-23 21:22:50,231 INFO L87 Difference]: Start difference. First operand 1167 states and 1820 transitions. Second operand has 17 states, 14 states have (on average 3.857142857142857) internal successors, (54), 13 states have internal predecessors, (54), 7 states have call successors, (18), 4 states have call predecessors, (18), 6 states have return successors, (17), 9 states have call predecessors, (17), 6 states have call successors, (17) [2023-11-23 21:22:56,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:22:56,007 INFO L93 Difference]: Finished difference Result 1672 states and 2633 transitions. [2023-11-23 21:22:56,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2023-11-23 21:22:56,008 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 14 states have (on average 3.857142857142857) internal successors, (54), 13 states have internal predecessors, (54), 7 states have call successors, (18), 4 states have call predecessors, (18), 6 states have return successors, (17), 9 states have call predecessors, (17), 6 states have call successors, (17) Word has length 95 [2023-11-23 21:22:56,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:22:56,022 INFO L225 Difference]: With dead ends: 1672 [2023-11-23 21:22:56,022 INFO L226 Difference]: Without dead ends: 1519 [2023-11-23 21:22:56,027 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 351 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=365, Invalid=1527, Unknown=0, NotChecked=0, Total=1892 [2023-11-23 21:22:56,027 INFO L413 NwaCegarLoop]: 370 mSDtfsCounter, 4036 mSDsluCounter, 2557 mSDsCounter, 0 mSdLazyCounter, 5126 mSolverCounterSat, 1541 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4080 SdHoareTripleChecker+Valid, 2927 SdHoareTripleChecker+Invalid, 6667 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1541 IncrementalHoareTripleChecker+Valid, 5126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.7s IncrementalHoareTripleChecker+Time [2023-11-23 21:22:56,028 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4080 Valid, 2927 Invalid, 6667 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1541 Valid, 5126 Invalid, 0 Unknown, 0 Unchecked, 4.7s Time] [2023-11-23 21:22:56,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1519 states. [2023-11-23 21:22:56,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1519 to 1394. [2023-11-23 21:22:56,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1394 states, 985 states have (on average 1.534010152284264) internal successors, (1511), 1045 states have internal predecessors, (1511), 313 states have call successors, (313), 81 states have call predecessors, (313), 95 states have return successors, (355), 303 states have call predecessors, (355), 308 states have call successors, (355) [2023-11-23 21:22:56,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1394 states to 1394 states and 2179 transitions. [2023-11-23 21:22:56,211 INFO L78 Accepts]: Start accepts. Automaton has 1394 states and 2179 transitions. Word has length 95 [2023-11-23 21:22:56,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:22:56,212 INFO L495 AbstractCegarLoop]: Abstraction has 1394 states and 2179 transitions. [2023-11-23 21:22:56,212 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 14 states have (on average 3.857142857142857) internal successors, (54), 13 states have internal predecessors, (54), 7 states have call successors, (18), 4 states have call predecessors, (18), 6 states have return successors, (17), 9 states have call predecessors, (17), 6 states have call successors, (17) [2023-11-23 21:22:56,213 INFO L276 IsEmpty]: Start isEmpty. Operand 1394 states and 2179 transitions. [2023-11-23 21:22:56,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2023-11-23 21:22:56,215 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:22:56,215 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-11-23 21:22:56,215 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-23 21:22:56,216 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:22:56,217 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:22:56,217 INFO L85 PathProgramCache]: Analyzing trace with hash 2024990581, now seen corresponding path program 1 times [2023-11-23 21:22:56,217 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:22:56,217 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [988925711] [2023-11-23 21:22:56,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:22:56,218 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:22:56,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:22:56,505 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-23 21:22:56,505 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:22:56,505 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [988925711] [2023-11-23 21:22:56,506 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [988925711] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:22:56,506 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:22:56,506 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-23 21:22:56,506 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1042603299] [2023-11-23 21:22:56,506 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:22:56,507 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-23 21:22:56,507 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:22:56,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-23 21:22:56,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-23 21:22:56,508 INFO L87 Difference]: Start difference. First operand 1394 states and 2179 transitions. Second operand has 5 states, 5 states have (on average 11.0) internal successors, (55), 5 states have internal predecessors, (55), 4 states have call successors, (18), 3 states have call predecessors, (18), 3 states have return successors, (17), 4 states have call predecessors, (17), 3 states have call successors, (17) [2023-11-23 21:22:58,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:22:58,648 INFO L93 Difference]: Finished difference Result 4571 states and 7268 transitions. [2023-11-23 21:22:58,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-23 21:22:58,649 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.0) internal successors, (55), 5 states have internal predecessors, (55), 4 states have call successors, (18), 3 states have call predecessors, (18), 3 states have return successors, (17), 4 states have call predecessors, (17), 3 states have call successors, (17) Word has length 96 [2023-11-23 21:22:58,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:22:58,676 INFO L225 Difference]: With dead ends: 4571 [2023-11-23 21:22:58,676 INFO L226 Difference]: Without dead ends: 3208 [2023-11-23 21:22:58,684 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 [2023-11-23 21:22:58,686 INFO L413 NwaCegarLoop]: 333 mSDtfsCounter, 1203 mSDsluCounter, 561 mSDsCounter, 0 mSdLazyCounter, 1541 mSolverCounterSat, 421 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1255 SdHoareTripleChecker+Valid, 894 SdHoareTripleChecker+Invalid, 1962 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 421 IncrementalHoareTripleChecker+Valid, 1541 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2023-11-23 21:22:58,687 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1255 Valid, 894 Invalid, 1962 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [421 Valid, 1541 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2023-11-23 21:22:58,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3208 states. [2023-11-23 21:22:58,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3208 to 2858. [2023-11-23 21:22:58,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2858 states, 2072 states have (on average 1.54488416988417) internal successors, (3201), 2193 states have internal predecessors, (3201), 592 states have call successors, (592), 161 states have call predecessors, (592), 193 states have return successors, (709), 557 states have call predecessors, (709), 587 states have call successors, (709) [2023-11-23 21:22:59,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2858 states to 2858 states and 4502 transitions. [2023-11-23 21:22:59,019 INFO L78 Accepts]: Start accepts. Automaton has 2858 states and 4502 transitions. Word has length 96 [2023-11-23 21:22:59,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:22:59,019 INFO L495 AbstractCegarLoop]: Abstraction has 2858 states and 4502 transitions. [2023-11-23 21:22:59,020 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.0) internal successors, (55), 5 states have internal predecessors, (55), 4 states have call successors, (18), 3 states have call predecessors, (18), 3 states have return successors, (17), 4 states have call predecessors, (17), 3 states have call successors, (17) [2023-11-23 21:22:59,020 INFO L276 IsEmpty]: Start isEmpty. Operand 2858 states and 4502 transitions. [2023-11-23 21:22:59,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2023-11-23 21:22:59,024 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:22:59,024 INFO L195 NwaCegarLoop]: trace histogram [3, 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] [2023-11-23 21:22:59,024 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-23 21:22:59,025 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:22:59,030 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:22:59,030 INFO L85 PathProgramCache]: Analyzing trace with hash -1525038049, now seen corresponding path program 1 times [2023-11-23 21:22:59,030 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:22:59,031 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2141851745] [2023-11-23 21:22:59,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:22:59,031 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:22:59,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:23:00,835 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-23 21:23:00,835 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:23:00,836 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2141851745] [2023-11-23 21:23:00,836 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2141851745] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 21:23:00,836 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2025358641] [2023-11-23 21:23:00,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:23:00,837 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:23:00,837 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19eff2a5-ec46-4e56-b447-f3c6a4e0140d/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:23:00,850 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19eff2a5-ec46-4e56-b447-f3c6a4e0140d/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:23:00,884 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19eff2a5-ec46-4e56-b447-f3c6a4e0140d/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-23 21:23:01,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:23:01,351 INFO L262 TraceCheckSpWp]: Trace formula consists of 1805 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-23 21:23:01,367 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:23:01,448 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-11-23 21:23:01,449 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 21:23:01,449 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2025358641] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:23:01,449 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-23 21:23:01,449 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [15] total 17 [2023-11-23 21:23:01,450 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [246736190] [2023-11-23 21:23:01,450 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:23:01,450 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-23 21:23:01,451 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:23:01,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-23 21:23:01,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2023-11-23 21:23:01,452 INFO L87 Difference]: Start difference. First operand 2858 states and 4502 transitions. Second operand has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 2 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (18), 2 states have call predecessors, (18), 1 states have call successors, (18) [2023-11-23 21:23:01,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:23:01,859 INFO L93 Difference]: Finished difference Result 2994 states and 4714 transitions. [2023-11-23 21:23:01,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-23 21:23:01,860 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 2 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (18), 2 states have call predecessors, (18), 1 states have call successors, (18) Word has length 101 [2023-11-23 21:23:01,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:23:01,884 INFO L225 Difference]: With dead ends: 2994 [2023-11-23 21:23:01,884 INFO L226 Difference]: Without dead ends: 2979 [2023-11-23 21:23:01,888 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2023-11-23 21:23:01,888 INFO L413 NwaCegarLoop]: 542 mSDtfsCounter, 44 mSDsluCounter, 1037 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 1579 SdHoareTripleChecker+Invalid, 114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 21:23:01,890 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 1579 Invalid, 114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 102 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 21:23:01,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2979 states. [2023-11-23 21:23:02,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2979 to 2868. [2023-11-23 21:23:02,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2868 states, 2082 states have (on average 1.5408261287223823) internal successors, (3208), 2203 states have internal predecessors, (3208), 592 states have call successors, (592), 161 states have call predecessors, (592), 193 states have return successors, (709), 557 states have call predecessors, (709), 587 states have call successors, (709) [2023-11-23 21:23:02,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2868 states to 2868 states and 4509 transitions. [2023-11-23 21:23:02,270 INFO L78 Accepts]: Start accepts. Automaton has 2868 states and 4509 transitions. Word has length 101 [2023-11-23 21:23:02,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:23:02,271 INFO L495 AbstractCegarLoop]: Abstraction has 2868 states and 4509 transitions. [2023-11-23 21:23:02,271 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 2 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (18), 2 states have call predecessors, (18), 1 states have call successors, (18) [2023-11-23 21:23:02,272 INFO L276 IsEmpty]: Start isEmpty. Operand 2868 states and 4509 transitions. [2023-11-23 21:23:02,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2023-11-23 21:23:02,276 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:23:02,276 INFO L195 NwaCegarLoop]: trace histogram [6, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:23:02,306 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19eff2a5-ec46-4e56-b447-f3c6a4e0140d/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-23 21:23:02,490 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19eff2a5-ec46-4e56-b447-f3c6a4e0140d/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-23 21:23:02,490 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:23:02,491 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:23:02,491 INFO L85 PathProgramCache]: Analyzing trace with hash -385607396, now seen corresponding path program 1 times [2023-11-23 21:23:02,491 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:23:02,491 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [354776318] [2023-11-23 21:23:02,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:23:02,491 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:23:02,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:23:04,129 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2023-11-23 21:23:04,130 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:23:04,130 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [354776318] [2023-11-23 21:23:04,130 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [354776318] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 21:23:04,130 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [858307545] [2023-11-23 21:23:04,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:23:04,131 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:23:04,131 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19eff2a5-ec46-4e56-b447-f3c6a4e0140d/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:23:04,132 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19eff2a5-ec46-4e56-b447-f3c6a4e0140d/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:23:04,148 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19eff2a5-ec46-4e56-b447-f3c6a4e0140d/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-23 21:23:04,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:23:04,599 INFO L262 TraceCheckSpWp]: Trace formula consists of 1852 conjuncts, 32 conjunts are in the unsatisfiable core [2023-11-23 21:23:04,613 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:23:05,478 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 21 proven. 2 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-11-23 21:23:05,479 INFO L327 TraceCheckSpWp]: Computing backward predicates...