./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 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dea7685-3ffa-4af8-bc53-57ad1b6bb891/bin/utaipan-verify-nQ1chXbOIh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dea7685-3ffa-4af8-bc53-57ad1b6bb891/bin/utaipan-verify-nQ1chXbOIh/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dea7685-3ffa-4af8-bc53-57ad1b6bb891/bin/utaipan-verify-nQ1chXbOIh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dea7685-3ffa-4af8-bc53-57ad1b6bb891/bin/utaipan-verify-nQ1chXbOIh/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_5dea7685-3ffa-4af8-bc53-57ad1b6bb891/bin/utaipan-verify-nQ1chXbOIh/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dea7685-3ffa-4af8-bc53-57ad1b6bb891/bin/utaipan-verify-nQ1chXbOIh --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 0.2.4-dev-0e0057c [2023-12-02 12:42:28,820 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-02 12:42:28,885 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dea7685-3ffa-4af8-bc53-57ad1b6bb891/bin/utaipan-verify-nQ1chXbOIh/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-12-02 12:42:28,890 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-02 12:42:28,891 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-12-02 12:42:28,916 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-02 12:42:28,917 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-12-02 12:42:28,917 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-12-02 12:42:28,918 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-02 12:42:28,918 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-02 12:42:28,919 INFO L153 SettingsManager]: * User list type=DISABLED [2023-12-02 12:42:28,919 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-12-02 12:42:28,920 INFO L153 SettingsManager]: * Explicit value domain=true [2023-12-02 12:42:28,920 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-12-02 12:42:28,921 INFO L153 SettingsManager]: * Octagon Domain=false [2023-12-02 12:42:28,922 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-12-02 12:42:28,922 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-12-02 12:42:28,923 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-12-02 12:42:28,923 INFO L153 SettingsManager]: * Interval Domain=false [2023-12-02 12:42:28,924 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-12-02 12:42:28,924 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-12-02 12:42:28,925 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-12-02 12:42:28,926 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-02 12:42:28,926 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-12-02 12:42:28,927 INFO L153 SettingsManager]: * sizeof long=4 [2023-12-02 12:42:28,927 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-02 12:42:28,928 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-12-02 12:42:28,928 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-02 12:42:28,929 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-12-02 12:42:28,929 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-02 12:42:28,930 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-12-02 12:42:28,930 INFO L153 SettingsManager]: * sizeof long double=12 [2023-12-02 12:42:28,931 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-12-02 12:42:28,931 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-02 12:42:28,931 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-02 12:42:28,931 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-12-02 12:42:28,932 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-02 12:42:28,932 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 12:42:28,932 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-02 12:42:28,932 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-02 12:42:28,932 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-12-02 12:42:28,933 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-12-02 12:42:28,933 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-12-02 12:42:28,933 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-02 12:42:28,933 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-12-02 12:42:28,934 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-12-02 12:42:28,934 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-12-02 12:42:28,934 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_5dea7685-3ffa-4af8-bc53-57ad1b6bb891/bin/utaipan-verify-nQ1chXbOIh/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dea7685-3ffa-4af8-bc53-57ad1b6bb891/bin/utaipan-verify-nQ1chXbOIh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e76bca30ba241523f00afb0ea64acdcdd753d47014073d825a6028b49fb542a9 [2023-12-02 12:42:29,137 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-02 12:42:29,158 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-02 12:42:29,160 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-02 12:42:29,161 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-02 12:42:29,162 INFO L274 PluginConnector]: CDTParser initialized [2023-12-02 12:42:29,163 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dea7685-3ffa-4af8-bc53-57ad1b6bb891/bin/utaipan-verify-nQ1chXbOIh/../../sv-benchmarks/c/product-lines/elevator_spec1_product09.cil.c [2023-12-02 12:42:31,843 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-02 12:42:32,159 INFO L384 CDTParser]: Found 1 translation units. [2023-12-02 12:42:32,160 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dea7685-3ffa-4af8-bc53-57ad1b6bb891/sv-benchmarks/c/product-lines/elevator_spec1_product09.cil.c [2023-12-02 12:42:32,183 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dea7685-3ffa-4af8-bc53-57ad1b6bb891/bin/utaipan-verify-nQ1chXbOIh/data/5e26f205b/f49e3995bc8f43709f5a1699871843d4/FLAG12796c7f0 [2023-12-02 12:42:32,197 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dea7685-3ffa-4af8-bc53-57ad1b6bb891/bin/utaipan-verify-nQ1chXbOIh/data/5e26f205b/f49e3995bc8f43709f5a1699871843d4 [2023-12-02 12:42:32,200 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-02 12:42:32,201 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-12-02 12:42:32,203 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-02 12:42:32,203 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-02 12:42:32,208 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-02 12:42:32,208 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 12:42:32" (1/1) ... [2023-12-02 12:42:32,210 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1223d88f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:42:32, skipping insertion in model container [2023-12-02 12:42:32,210 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 12:42:32" (1/1) ... [2023-12-02 12:42:32,288 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-02 12:42:32,426 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_5dea7685-3ffa-4af8-bc53-57ad1b6bb891/sv-benchmarks/c/product-lines/elevator_spec1_product09.cil.c[1545,1558] [2023-12-02 12:42:32,699 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 12:42:32,711 INFO L202 MainTranslator]: Completed pre-run [2023-12-02 12:42:32,721 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"wsllib_check.i","") [48] [2023-12-02 12:42:32,723 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"libacc.i","") [57] [2023-12-02 12:42:32,723 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"featureselect.i","") [423] [2023-12-02 12:42:32,723 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Test.i","") [461] [2023-12-02 12:42:32,724 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Specification1_spec.i","") [822] [2023-12-02 12:42:32,724 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"UnitTests.i","") [1005] [2023-12-02 12:42:32,724 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Floor.i","") [1097] [2023-12-02 12:42:32,724 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Elevator.i","") [1768] [2023-12-02 12:42:32,724 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"scenario.i","") [3206] [2023-12-02 12:42:32,725 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Person.i","") [3219] [2023-12-02 12:42:32,728 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_5dea7685-3ffa-4af8-bc53-57ad1b6bb891/sv-benchmarks/c/product-lines/elevator_spec1_product09.cil.c[1545,1558] [2023-12-02 12:42:32,842 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 12:42:32,866 INFO L206 MainTranslator]: Completed translation [2023-12-02 12:42:32,867 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:42:32 WrapperNode [2023-12-02 12:42:32,867 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-02 12:42:32,868 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-02 12:42:32,868 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-02 12:42:32,868 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-02 12:42:32,873 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:42:32" (1/1) ... [2023-12-02 12:42:32,899 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:42:32" (1/1) ... [2023-12-02 12:42:32,937 INFO L138 Inliner]: procedures = 89, calls = 331, calls flagged for inlining = 25, calls inlined = 22, statements flattened = 800 [2023-12-02 12:42:32,937 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-02 12:42:32,938 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-02 12:42:32,938 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-02 12:42:32,939 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-02 12:42:32,952 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:42:32" (1/1) ... [2023-12-02 12:42:32,952 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:42:32" (1/1) ... [2023-12-02 12:42:32,957 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:42:32" (1/1) ... [2023-12-02 12:42:32,957 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:42:32" (1/1) ... [2023-12-02 12:42:32,979 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:42:32" (1/1) ... [2023-12-02 12:42:32,993 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:42:32" (1/1) ... [2023-12-02 12:42:33,000 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:42:32" (1/1) ... [2023-12-02 12:42:33,006 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:42:32" (1/1) ... [2023-12-02 12:42:33,015 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-02 12:42:33,016 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-02 12:42:33,016 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-02 12:42:33,016 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-02 12:42:33,017 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:42:32" (1/1) ... [2023-12-02 12:42:33,023 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 12:42:33,038 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dea7685-3ffa-4af8-bc53-57ad1b6bb891/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 12:42:33,055 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dea7685-3ffa-4af8-bc53-57ad1b6bb891/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-12-02 12:42:33,069 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dea7685-3ffa-4af8-bc53-57ad1b6bb891/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-12-02 12:42:33,092 INFO L130 BoogieDeclarations]: Found specification of procedure angelinaCall [2023-12-02 12:42:33,093 INFO L138 BoogieDeclarations]: Found implementation of procedure angelinaCall [2023-12-02 12:42:33,093 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-02 12:42:33,093 INFO L130 BoogieDeclarations]: Found specification of procedure bigMacCall [2023-12-02 12:42:33,093 INFO L138 BoogieDeclarations]: Found implementation of procedure bigMacCall [2023-12-02 12:42:33,093 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2023-12-02 12:42:33,093 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2023-12-02 12:42:33,094 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2023-12-02 12:42:33,094 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2023-12-02 12:42:33,094 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2023-12-02 12:42:33,094 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2023-12-02 12:42:33,094 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2023-12-02 12:42:33,094 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2023-12-02 12:42:33,094 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2023-12-02 12:42:33,094 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2023-12-02 12:42:33,095 INFO L130 BoogieDeclarations]: Found specification of procedure areDoorsOpen [2023-12-02 12:42:33,095 INFO L138 BoogieDeclarations]: Found implementation of procedure areDoorsOpen [2023-12-02 12:42:33,095 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2023-12-02 12:42:33,095 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2023-12-02 12:42:33,095 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2023-12-02 12:42:33,095 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2023-12-02 12:42:33,095 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2023-12-02 12:42:33,095 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2023-12-02 12:42:33,096 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2023-12-02 12:42:33,096 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2023-12-02 12:42:33,096 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2023-12-02 12:42:33,096 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2023-12-02 12:42:33,096 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2023-12-02 12:42:33,096 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2023-12-02 12:42:33,096 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2023-12-02 12:42:33,096 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2023-12-02 12:42:33,097 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2023-12-02 12:42:33,097 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2023-12-02 12:42:33,097 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2023-12-02 12:42:33,097 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2023-12-02 12:42:33,097 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-12-02 12:42:33,097 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2023-12-02 12:42:33,097 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2023-12-02 12:42:33,097 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2023-12-02 12:42:33,098 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2023-12-02 12:42:33,098 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2023-12-02 12:42:33,098 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2023-12-02 12:42:33,098 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-02 12:42:33,098 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-02 12:42:33,098 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2023-12-02 12:42:33,098 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2023-12-02 12:42:33,230 INFO L241 CfgBuilder]: Building ICFG [2023-12-02 12:42:33,232 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-02 12:42:34,106 INFO L282 CfgBuilder]: Performing block encoding [2023-12-02 12:42:34,887 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-02 12:42:34,888 INFO L309 CfgBuilder]: Removed 1 assume(true) statements. [2023-12-02 12:42:34,889 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 12:42:34 BoogieIcfgContainer [2023-12-02 12:42:34,889 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-02 12:42:34,892 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-02 12:42:34,892 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-02 12:42:34,895 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-02 12:42:34,895 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.12 12:42:32" (1/3) ... [2023-12-02 12:42:34,896 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@730c71f0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 12:42:34, skipping insertion in model container [2023-12-02 12:42:34,896 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:42:32" (2/3) ... [2023-12-02 12:42:34,896 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@730c71f0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 12:42:34, skipping insertion in model container [2023-12-02 12:42:34,896 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 12:42:34" (3/3) ... [2023-12-02 12:42:34,898 INFO L112 eAbstractionObserver]: Analyzing ICFG elevator_spec1_product09.cil.c [2023-12-02 12:42:34,916 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-02 12:42:34,916 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-12-02 12:42:34,975 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-02 12:42:34,981 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;@3e93037c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-02 12:42:34,981 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-12-02 12:42:34,988 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) [2023-12-02 12:42:35,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2023-12-02 12:42:35,043 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:42:35,043 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] [2023-12-02 12:42:35,044 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 12:42:35,049 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:42:35,049 INFO L85 PathProgramCache]: Analyzing trace with hash 409763476, now seen corresponding path program 1 times [2023-12-02 12:42:35,058 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 12:42:35,059 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [418431142] [2023-12-02 12:42:35,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:42:35,059 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 12:42:35,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:42:35,798 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-02 12:42:35,798 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 12:42:35,799 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [418431142] [2023-12-02 12:42:35,799 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [418431142] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 12:42:35,800 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 12:42:35,800 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-12-02 12:42:35,801 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [970606151] [2023-12-02 12:42:35,802 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 12:42:35,807 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-02 12:42:35,807 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 12:42:35,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-02 12:42:35,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-12-02 12:42:35,840 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) [2023-12-02 12:42:38,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:42:38,253 INFO L93 Difference]: Finished difference Result 1159 states and 1908 transitions. [2023-12-02 12:42:38,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-12-02 12:42:38,255 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 [2023-12-02 12:42:38,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:42:38,279 INFO L225 Difference]: With dead ends: 1159 [2023-12-02 12:42:38,279 INFO L226 Difference]: Without dead ends: 828 [2023-12-02 12:42:38,287 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 [2023-12-02 12:42:38,291 INFO L413 NwaCegarLoop]: 376 mSDtfsCounter, 1625 mSDsluCounter, 1272 mSDsCounter, 0 mSdLazyCounter, 2249 mSolverCounterSat, 479 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1686 SdHoareTripleChecker+Valid, 1648 SdHoareTripleChecker+Invalid, 2728 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 479 IncrementalHoareTripleChecker+Valid, 2249 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2023-12-02 12:42:38,291 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1686 Valid, 1648 Invalid, 2728 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [479 Valid, 2249 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2023-12-02 12:42:38,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 828 states. [2023-12-02 12:42:38,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 828 to 779. [2023-12-02 12:42:38,412 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) [2023-12-02 12:42:38,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 779 states to 779 states and 1276 transitions. [2023-12-02 12:42:38,423 INFO L78 Accepts]: Start accepts. Automaton has 779 states and 1276 transitions. Word has length 62 [2023-12-02 12:42:38,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:42:38,424 INFO L495 AbstractCegarLoop]: Abstraction has 779 states and 1276 transitions. [2023-12-02 12:42:38,424 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) [2023-12-02 12:42:38,424 INFO L276 IsEmpty]: Start isEmpty. Operand 779 states and 1276 transitions. [2023-12-02 12:42:38,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2023-12-02 12:42:38,431 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:42:38,431 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] [2023-12-02 12:42:38,432 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-12-02 12:42:38,432 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 12:42:38,432 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:42:38,433 INFO L85 PathProgramCache]: Analyzing trace with hash 1981387559, now seen corresponding path program 1 times [2023-12-02 12:42:38,433 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 12:42:38,433 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2080950768] [2023-12-02 12:42:38,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:42:38,433 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 12:42:38,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:42:38,752 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-02 12:42:38,752 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 12:42:38,752 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2080950768] [2023-12-02 12:42:38,753 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2080950768] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 12:42:38,753 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 12:42:38,753 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-12-02 12:42:38,753 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [499460615] [2023-12-02 12:42:38,753 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 12:42:38,755 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-02 12:42:38,755 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 12:42:38,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-02 12:42:38,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-12-02 12:42:38,757 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) [2023-12-02 12:42:38,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:42:38,948 INFO L93 Difference]: Finished difference Result 1309 states and 2151 transitions. [2023-12-02 12:42:38,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-02 12:42:38,948 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 [2023-12-02 12:42:38,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:42:38,957 INFO L225 Difference]: With dead ends: 1309 [2023-12-02 12:42:38,957 INFO L226 Difference]: Without dead ends: 849 [2023-12-02 12:42:38,960 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 [2023-12-02 12:42:38,962 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, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 12:42:38,962 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 2179 Invalid, 158 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 156 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 12:42:38,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 849 states. [2023-12-02 12:42:39,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 849 to 791. [2023-12-02 12:42:39,021 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) [2023-12-02 12:42:39,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 791 states to 791 states and 1291 transitions. [2023-12-02 12:42:39,030 INFO L78 Accepts]: Start accepts. Automaton has 791 states and 1291 transitions. Word has length 67 [2023-12-02 12:42:39,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:42:39,030 INFO L495 AbstractCegarLoop]: Abstraction has 791 states and 1291 transitions. [2023-12-02 12:42:39,031 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) [2023-12-02 12:42:39,031 INFO L276 IsEmpty]: Start isEmpty. Operand 791 states and 1291 transitions. [2023-12-02 12:42:39,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2023-12-02 12:42:39,035 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:42:39,035 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 12:42:39,035 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-12-02 12:42:39,035 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 12:42:39,036 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:42:39,036 INFO L85 PathProgramCache]: Analyzing trace with hash 1115116687, now seen corresponding path program 1 times [2023-12-02 12:42:39,036 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 12:42:39,036 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1571963094] [2023-12-02 12:42:39,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:42:39,036 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 12:42:39,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:42:39,435 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-02 12:42:39,436 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 12:42:39,436 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1571963094] [2023-12-02 12:42:39,436 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1571963094] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 12:42:39,436 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 12:42:39,436 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-12-02 12:42:39,436 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1420245977] [2023-12-02 12:42:39,436 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 12:42:39,437 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-12-02 12:42:39,437 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 12:42:39,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-12-02 12:42:39,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-12-02 12:42:39,438 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) [2023-12-02 12:42:41,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:42:41,318 INFO L93 Difference]: Finished difference Result 1798 states and 2930 transitions. [2023-12-02 12:42:41,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-12-02 12:42:41,319 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 [2023-12-02 12:42:41,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:42:41,329 INFO L225 Difference]: With dead ends: 1798 [2023-12-02 12:42:41,329 INFO L226 Difference]: Without dead ends: 1230 [2023-12-02 12:42:41,332 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 [2023-12-02 12:42:41,334 INFO L413 NwaCegarLoop]: 475 mSDtfsCounter, 1606 mSDsluCounter, 943 mSDsCounter, 0 mSdLazyCounter, 2189 mSolverCounterSat, 602 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s 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, 1.7s IncrementalHoareTripleChecker+Time [2023-12-02 12:42:41,334 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1749 Valid, 1418 Invalid, 2791 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [602 Valid, 2189 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2023-12-02 12:42:41,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1230 states. [2023-12-02 12:42:41,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1230 to 1136. [2023-12-02 12:42:41,416 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) [2023-12-02 12:42:41,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1136 states to 1136 states and 1817 transitions. [2023-12-02 12:42:41,426 INFO L78 Accepts]: Start accepts. Automaton has 1136 states and 1817 transitions. Word has length 71 [2023-12-02 12:42:41,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:42:41,427 INFO L495 AbstractCegarLoop]: Abstraction has 1136 states and 1817 transitions. [2023-12-02 12:42:41,427 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) [2023-12-02 12:42:41,427 INFO L276 IsEmpty]: Start isEmpty. Operand 1136 states and 1817 transitions. [2023-12-02 12:42:41,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2023-12-02 12:42:41,430 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:42:41,430 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] [2023-12-02 12:42:41,430 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-12-02 12:42:41,430 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 12:42:41,431 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:42:41,431 INFO L85 PathProgramCache]: Analyzing trace with hash -1656245693, now seen corresponding path program 1 times [2023-12-02 12:42:41,431 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 12:42:41,431 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [496602114] [2023-12-02 12:42:41,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:42:41,432 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 12:42:41,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:42:41,627 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-02 12:42:41,628 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 12:42:41,628 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [496602114] [2023-12-02 12:42:41,628 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [496602114] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 12:42:41,629 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 12:42:41,629 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-02 12:42:41,629 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [906688921] [2023-12-02 12:42:41,629 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 12:42:41,629 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 12:42:41,630 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 12:42:41,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 12:42:41,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-02 12:42:41,631 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) [2023-12-02 12:42:41,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:42:41,856 INFO L93 Difference]: Finished difference Result 2193 states and 3564 transitions. [2023-12-02 12:42:41,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-02 12:42:41,856 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 [2023-12-02 12:42:41,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:42:41,875 INFO L225 Difference]: With dead ends: 2193 [2023-12-02 12:42:41,875 INFO L226 Difference]: Without dead ends: 1136 [2023-12-02 12:42:41,880 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 [2023-12-02 12:42:41,882 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, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 12:42:41,882 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [220 Valid, 1407 Invalid, 164 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 146 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 12:42:41,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1136 states. [2023-12-02 12:42:41,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1136 to 1136. [2023-12-02 12:42:41,950 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) [2023-12-02 12:42:41,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1136 states to 1136 states and 1785 transitions. [2023-12-02 12:42:41,958 INFO L78 Accepts]: Start accepts. Automaton has 1136 states and 1785 transitions. Word has length 74 [2023-12-02 12:42:41,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:42:41,959 INFO L495 AbstractCegarLoop]: Abstraction has 1136 states and 1785 transitions. [2023-12-02 12:42:41,959 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) [2023-12-02 12:42:41,959 INFO L276 IsEmpty]: Start isEmpty. Operand 1136 states and 1785 transitions. [2023-12-02 12:42:41,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2023-12-02 12:42:41,961 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:42:41,961 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] [2023-12-02 12:42:41,962 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-12-02 12:42:41,962 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 12:42:41,962 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:42:41,962 INFO L85 PathProgramCache]: Analyzing trace with hash -276188426, now seen corresponding path program 1 times [2023-12-02 12:42:41,962 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 12:42:41,963 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [936516214] [2023-12-02 12:42:41,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:42:41,963 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 12:42:42,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:42:42,186 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-12-02 12:42:42,186 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 12:42:42,186 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [936516214] [2023-12-02 12:42:42,186 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [936516214] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 12:42:42,186 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 12:42:42,187 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-12-02 12:42:42,187 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1711983977] [2023-12-02 12:42:42,187 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 12:42:42,187 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-02 12:42:42,188 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 12:42:42,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-02 12:42:42,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-12-02 12:42:42,189 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) [2023-12-02 12:42:43,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:42:43,837 INFO L93 Difference]: Finished difference Result 2180 states and 3442 transitions. [2023-12-02 12:42:43,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-12-02 12:42:43,838 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 [2023-12-02 12:42:43,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:42:43,849 INFO L225 Difference]: With dead ends: 2180 [2023-12-02 12:42:43,849 INFO L226 Difference]: Without dead ends: 1324 [2023-12-02 12:42:43,853 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2023-12-02 12:42:43,855 INFO L413 NwaCegarLoop]: 353 mSDtfsCounter, 912 mSDsluCounter, 1158 mSDsCounter, 0 mSdLazyCounter, 2022 mSolverCounterSat, 367 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s 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, 1.5s IncrementalHoareTripleChecker+Time [2023-12-02 12:42:43,855 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [980 Valid, 1511 Invalid, 2389 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [367 Valid, 2022 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2023-12-02 12:42:43,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1324 states. [2023-12-02 12:42:43,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1324 to 1163. [2023-12-02 12:42:43,933 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) [2023-12-02 12:42:43,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1163 states to 1163 states and 1819 transitions. [2023-12-02 12:42:43,943 INFO L78 Accepts]: Start accepts. Automaton has 1163 states and 1819 transitions. Word has length 76 [2023-12-02 12:42:43,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:42:43,943 INFO L495 AbstractCegarLoop]: Abstraction has 1163 states and 1819 transitions. [2023-12-02 12:42:43,944 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) [2023-12-02 12:42:43,944 INFO L276 IsEmpty]: Start isEmpty. Operand 1163 states and 1819 transitions. [2023-12-02 12:42:43,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2023-12-02 12:42:43,946 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:42:43,946 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] [2023-12-02 12:42:43,946 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-12-02 12:42:43,946 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 12:42:43,947 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:42:43,947 INFO L85 PathProgramCache]: Analyzing trace with hash 560507650, now seen corresponding path program 1 times [2023-12-02 12:42:43,947 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 12:42:43,947 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1486769538] [2023-12-02 12:42:43,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:42:43,947 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 12:42:43,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:42:44,218 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-12-02 12:42:44,218 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 12:42:44,219 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1486769538] [2023-12-02 12:42:44,219 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1486769538] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 12:42:44,219 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 12:42:44,219 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-12-02 12:42:44,219 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1758250874] [2023-12-02 12:42:44,220 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 12:42:44,220 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-02 12:42:44,220 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 12:42:44,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-02 12:42:44,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-12-02 12:42:44,221 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) [2023-12-02 12:42:44,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:42:44,678 INFO L93 Difference]: Finished difference Result 1235 states and 1932 transitions. [2023-12-02 12:42:44,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-02 12:42:44,679 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 [2023-12-02 12:42:44,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:42:44,689 INFO L225 Difference]: With dead ends: 1235 [2023-12-02 12:42:44,689 INFO L226 Difference]: Without dead ends: 1220 [2023-12-02 12:42:44,691 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 [2023-12-02 12:42:44,691 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 [2023-12-02 12:42:44,692 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] [2023-12-02 12:42:44,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1220 states. [2023-12-02 12:42:44,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1220 to 1167. [2023-12-02 12:42:44,783 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) [2023-12-02 12:42:44,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1167 states to 1167 states and 1823 transitions. [2023-12-02 12:42:44,792 INFO L78 Accepts]: Start accepts. Automaton has 1167 states and 1823 transitions. Word has length 80 [2023-12-02 12:42:44,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:42:44,792 INFO L495 AbstractCegarLoop]: Abstraction has 1167 states and 1823 transitions. [2023-12-02 12:42:44,792 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) [2023-12-02 12:42:44,793 INFO L276 IsEmpty]: Start isEmpty. Operand 1167 states and 1823 transitions. [2023-12-02 12:42:44,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2023-12-02 12:42:44,795 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:42:44,795 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] [2023-12-02 12:42:44,795 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-12-02 12:42:44,795 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 12:42:44,796 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:42:44,796 INFO L85 PathProgramCache]: Analyzing trace with hash 994837614, now seen corresponding path program 1 times [2023-12-02 12:42:44,796 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 12:42:44,796 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1559877262] [2023-12-02 12:42:44,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:42:44,797 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 12:42:44,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:42:45,092 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-12-02 12:42:45,093 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 12:42:45,093 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1559877262] [2023-12-02 12:42:45,093 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1559877262] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 12:42:45,093 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 12:42:45,093 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-12-02 12:42:45,093 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1437735257] [2023-12-02 12:42:45,093 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 12:42:45,094 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-02 12:42:45,094 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 12:42:45,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-02 12:42:45,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-12-02 12:42:45,095 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) [2023-12-02 12:42:45,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:42:45,356 INFO L93 Difference]: Finished difference Result 1186 states and 1847 transitions. [2023-12-02 12:42:45,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-12-02 12:42:45,357 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 [2023-12-02 12:42:45,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:42:45,367 INFO L225 Difference]: With dead ends: 1186 [2023-12-02 12:42:45,367 INFO L226 Difference]: Without dead ends: 1171 [2023-12-02 12:42:45,368 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 [2023-12-02 12:42:45,369 INFO L413 NwaCegarLoop]: 498 mSDtfsCounter, 257 mSDsluCounter, 2216 mSDsCounter, 0 mSdLazyCounter, 246 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s 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 [2023-12-02 12:42:45,369 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] [2023-12-02 12:42:45,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1171 states. [2023-12-02 12:42:45,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1171 to 1167. [2023-12-02 12:42:45,454 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) [2023-12-02 12:42:45,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1167 states to 1167 states and 1820 transitions. [2023-12-02 12:42:45,463 INFO L78 Accepts]: Start accepts. Automaton has 1167 states and 1820 transitions. Word has length 85 [2023-12-02 12:42:45,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:42:45,463 INFO L495 AbstractCegarLoop]: Abstraction has 1167 states and 1820 transitions. [2023-12-02 12:42:45,464 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) [2023-12-02 12:42:45,464 INFO L276 IsEmpty]: Start isEmpty. Operand 1167 states and 1820 transitions. [2023-12-02 12:42:45,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2023-12-02 12:42:45,466 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:42:45,466 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] [2023-12-02 12:42:45,466 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-12-02 12:42:45,466 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 12:42:45,467 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:42:45,467 INFO L85 PathProgramCache]: Analyzing trace with hash -401650962, now seen corresponding path program 1 times [2023-12-02 12:42:45,467 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 12:42:45,467 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [483250708] [2023-12-02 12:42:45,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:42:45,467 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 12:42:45,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:42:46,906 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-12-02 12:42:46,906 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 12:42:46,906 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [483250708] [2023-12-02 12:42:46,906 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [483250708] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 12:42:46,906 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 12:42:46,907 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2023-12-02 12:42:46,907 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [119738479] [2023-12-02 12:42:46,907 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 12:42:46,908 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-12-02 12:42:46,908 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 12:42:46,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-12-02 12:42:46,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2023-12-02 12:42:46,909 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) [2023-12-02 12:42:50,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:42:50,963 INFO L93 Difference]: Finished difference Result 1672 states and 2633 transitions. [2023-12-02 12:42:50,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2023-12-02 12:42:50,963 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 [2023-12-02 12:42:50,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:42:50,972 INFO L225 Difference]: With dead ends: 1672 [2023-12-02 12:42:50,972 INFO L226 Difference]: Without dead ends: 1519 [2023-12-02 12:42:50,976 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 351 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=365, Invalid=1527, Unknown=0, NotChecked=0, Total=1892 [2023-12-02 12:42:50,976 INFO L413 NwaCegarLoop]: 370 mSDtfsCounter, 4036 mSDsluCounter, 2557 mSDsCounter, 0 mSdLazyCounter, 5126 mSolverCounterSat, 1541 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4080 SdHoareTripleChecker+Valid, 2927 SdHoareTripleChecker+Invalid, 6667 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1541 IncrementalHoareTripleChecker+Valid, 5126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2023-12-02 12:42:50,977 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4080 Valid, 2927 Invalid, 6667 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1541 Valid, 5126 Invalid, 0 Unknown, 0 Unchecked, 3.3s Time] [2023-12-02 12:42:50,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1519 states. [2023-12-02 12:42:51,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1519 to 1394. [2023-12-02 12:42:51,059 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) [2023-12-02 12:42:51,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1394 states to 1394 states and 2179 transitions. [2023-12-02 12:42:51,064 INFO L78 Accepts]: Start accepts. Automaton has 1394 states and 2179 transitions. Word has length 95 [2023-12-02 12:42:51,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:42:51,065 INFO L495 AbstractCegarLoop]: Abstraction has 1394 states and 2179 transitions. [2023-12-02 12:42:51,065 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) [2023-12-02 12:42:51,065 INFO L276 IsEmpty]: Start isEmpty. Operand 1394 states and 2179 transitions. [2023-12-02 12:42:51,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2023-12-02 12:42:51,067 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:42:51,067 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] [2023-12-02 12:42:51,067 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-12-02 12:42:51,067 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 12:42:51,067 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:42:51,068 INFO L85 PathProgramCache]: Analyzing trace with hash 2024990581, now seen corresponding path program 1 times [2023-12-02 12:42:51,068 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 12:42:51,068 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1149967234] [2023-12-02 12:42:51,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:42:51,068 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 12:42:51,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:42:51,294 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-12-02 12:42:51,294 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 12:42:51,294 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1149967234] [2023-12-02 12:42:51,295 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1149967234] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 12:42:51,295 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 12:42:51,295 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-12-02 12:42:51,295 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1148269884] [2023-12-02 12:42:51,295 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 12:42:51,296 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-02 12:42:51,296 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 12:42:51,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-02 12:42:51,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-12-02 12:42:51,297 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) [2023-12-02 12:42:52,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:42:52,949 INFO L93 Difference]: Finished difference Result 4571 states and 7268 transitions. [2023-12-02 12:42:52,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-02 12:42:52,950 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 [2023-12-02 12:42:52,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:42:52,970 INFO L225 Difference]: With dead ends: 4571 [2023-12-02 12:42:52,970 INFO L226 Difference]: Without dead ends: 3208 [2023-12-02 12:42:52,977 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 [2023-12-02 12:42:52,978 INFO L413 NwaCegarLoop]: 333 mSDtfsCounter, 1203 mSDsluCounter, 561 mSDsCounter, 0 mSdLazyCounter, 1541 mSolverCounterSat, 421 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s 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, 1.4s IncrementalHoareTripleChecker+Time [2023-12-02 12:42:52,978 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1255 Valid, 894 Invalid, 1962 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [421 Valid, 1541 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2023-12-02 12:42:52,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3208 states. [2023-12-02 12:42:53,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3208 to 2858. [2023-12-02 12:42:53,261 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) [2023-12-02 12:42:53,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2858 states to 2858 states and 4502 transitions. [2023-12-02 12:42:53,276 INFO L78 Accepts]: Start accepts. Automaton has 2858 states and 4502 transitions. Word has length 96 [2023-12-02 12:42:53,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:42:53,277 INFO L495 AbstractCegarLoop]: Abstraction has 2858 states and 4502 transitions. [2023-12-02 12:42:53,277 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) [2023-12-02 12:42:53,277 INFO L276 IsEmpty]: Start isEmpty. Operand 2858 states and 4502 transitions. [2023-12-02 12:42:53,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2023-12-02 12:42:53,280 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:42:53,280 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] [2023-12-02 12:42:53,281 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-12-02 12:42:53,281 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 12:42:53,281 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:42:53,281 INFO L85 PathProgramCache]: Analyzing trace with hash -1525038049, now seen corresponding path program 1 times [2023-12-02 12:42:53,281 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 12:42:53,281 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1525777082] [2023-12-02 12:42:53,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:42:53,282 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 12:42:53,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:42:54,488 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-12-02 12:42:54,488 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 12:42:54,488 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1525777082] [2023-12-02 12:42:54,488 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1525777082] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 12:42:54,488 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1042742000] [2023-12-02 12:42:54,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:42:54,489 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 12:42:54,489 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dea7685-3ffa-4af8-bc53-57ad1b6bb891/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 12:42:54,492 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dea7685-3ffa-4af8-bc53-57ad1b6bb891/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 12:42:54,493 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dea7685-3ffa-4af8-bc53-57ad1b6bb891/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-12-02 12:42:54,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:42:54,808 INFO L262 TraceCheckSpWp]: Trace formula consists of 1805 conjuncts, 7 conjunts are in the unsatisfiable core [2023-12-02 12:42:54,818 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:42:54,876 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-12-02 12:42:54,877 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 12:42:54,877 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1042742000] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 12:42:54,877 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 12:42:54,877 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [15] total 17 [2023-12-02 12:42:54,877 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [272400733] [2023-12-02 12:42:54,877 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 12:42:54,878 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 12:42:54,878 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 12:42:54,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 12:42:54,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2023-12-02 12:42:54,879 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) [2023-12-02 12:42:55,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:42:55,323 INFO L93 Difference]: Finished difference Result 2994 states and 4714 transitions. [2023-12-02 12:42:55,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-02 12:42:55,324 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 [2023-12-02 12:42:55,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:42:55,345 INFO L225 Difference]: With dead ends: 2994 [2023-12-02 12:42:55,345 INFO L226 Difference]: Without dead ends: 2979 [2023-12-02 12:42:55,347 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 [2023-12-02 12:42:55,348 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 [2023-12-02 12:42:55,348 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] [2023-12-02 12:42:55,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2979 states. [2023-12-02 12:42:55,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2979 to 2868. [2023-12-02 12:42:55,629 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) [2023-12-02 12:42:55,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2868 states to 2868 states and 4509 transitions. [2023-12-02 12:42:55,645 INFO L78 Accepts]: Start accepts. Automaton has 2868 states and 4509 transitions. Word has length 101 [2023-12-02 12:42:55,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:42:55,645 INFO L495 AbstractCegarLoop]: Abstraction has 2868 states and 4509 transitions. [2023-12-02 12:42:55,645 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) [2023-12-02 12:42:55,645 INFO L276 IsEmpty]: Start isEmpty. Operand 2868 states and 4509 transitions. [2023-12-02 12:42:55,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2023-12-02 12:42:55,649 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:42:55,650 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] [2023-12-02 12:42:55,659 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dea7685-3ffa-4af8-bc53-57ad1b6bb891/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-12-02 12:42:55,851 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dea7685-3ffa-4af8-bc53-57ad1b6bb891/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 12:42:55,852 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 12:42:55,852 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:42:55,852 INFO L85 PathProgramCache]: Analyzing trace with hash -385607396, now seen corresponding path program 1 times [2023-12-02 12:42:55,853 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 12:42:55,853 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1734319583] [2023-12-02 12:42:55,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:42:55,853 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 12:42:55,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:42:56,938 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2023-12-02 12:42:56,938 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 12:42:56,939 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1734319583] [2023-12-02 12:42:56,939 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1734319583] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 12:42:56,939 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [736217729] [2023-12-02 12:42:56,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:42:56,939 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 12:42:56,939 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dea7685-3ffa-4af8-bc53-57ad1b6bb891/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 12:42:56,941 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dea7685-3ffa-4af8-bc53-57ad1b6bb891/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 12:42:56,944 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dea7685-3ffa-4af8-bc53-57ad1b6bb891/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-12-02 12:42:57,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:42:57,326 INFO L262 TraceCheckSpWp]: Trace formula consists of 1852 conjuncts, 73 conjunts are in the unsatisfiable core [2023-12-02 12:42:57,338 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:42:58,839 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 25 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-12-02 12:42:58,839 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 12:44:53,086 WARN L293 SmtUtils]: Spent 1.76m on a formula simplification. DAG size of input: 1441 DAG size of output: 51 (called from [L 279] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2023-12-02 12:46:38,689 WARN L293 SmtUtils]: Spent 1.75m on a formula simplification. DAG size of input: 1441 DAG size of output: 51 (called from [L 279] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2023-12-02 12:46:40,406 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 5 proven. 9 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2023-12-02 12:46:40,407 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [736217729] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 12:46:40,407 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [174444863] [2023-12-02 12:46:40,428 INFO L159 IcfgInterpreter]: Started Sifa with 99 locations of interest [2023-12-02 12:46:40,428 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 12:46:40,432 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 12:46:40,436 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 12:46:40,437 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 12:47:04,818 INFO L197 IcfgInterpreter]: Interpreting procedure __automaton_fail with input of size 479 for LOIs [2023-12-02 12:47:05,380 INFO L197 IcfgInterpreter]: Interpreting procedure cleanup with input of size 574 for LOIs [2023-12-02 12:48:37,708 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 574 for LOIs [2023-12-02 12:48:44,772 INFO L197 IcfgInterpreter]: Interpreting procedure stopRequestedInDirection with input of size 437 for LOIs [2023-12-02 12:48:48,060 INFO L197 IcfgInterpreter]: Interpreting procedure isFloorCalling with input of size 443 for LOIs [2023-12-02 12:48:48,730 INFO L197 IcfgInterpreter]: Interpreting procedure bigMacCall with input of size 583 for LOIs [2023-12-02 12:49:01,984 INFO L197 IcfgInterpreter]: Interpreting procedure isBlocked with input of size 456 for LOIs [2023-12-02 12:49:03,520 INFO L197 IcfgInterpreter]: Interpreting procedure isTopFloor with input of size 433 for LOIs [2023-12-02 12:49:03,927 INFO L197 IcfgInterpreter]: Interpreting procedure angelinaCall with input of size 546 for LOIs [2023-12-02 12:49:15,231 INFO L197 IcfgInterpreter]: Interpreting procedure initPersonOnFloor with input of size 638 for LOIs [2023-12-02 12:49:19,893 INFO L197 IcfgInterpreter]: Interpreting procedure getOrigin with input of size 515 for LOIs [2023-12-02 12:49:21,408 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 12:49:45,880 WARN L293 SmtUtils]: Spent 6.82s on a formula simplification. DAG size of input: 559 DAG size of output: 525 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 12:50:09,590 WARN L293 SmtUtils]: Spent 12.64s on a formula simplification. DAG size of input: 638 DAG size of output: 598 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 12:51:25,240 WARN L293 SmtUtils]: Spent 7.35s on a formula simplification. DAG size of input: 490 DAG size of output: 463 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 12:51:33,128 WARN L293 SmtUtils]: Spent 7.16s on a formula simplification. DAG size of input: 492 DAG size of output: 465 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 12:51:41,131 WARN L293 SmtUtils]: Spent 7.25s on a formula simplification. DAG size of input: 494 DAG size of output: 467 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 12:51:48,695 WARN L293 SmtUtils]: Spent 6.84s on a formula simplification. DAG size of input: 456 DAG size of output: 429 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 12:51:56,416 WARN L293 SmtUtils]: Spent 6.95s on a formula simplification. DAG size of input: 460 DAG size of output: 433 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 12:52:04,327 WARN L293 SmtUtils]: Spent 7.11s on a formula simplification. DAG size of input: 496 DAG size of output: 469 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 12:52:12,606 WARN L293 SmtUtils]: Spent 7.36s on a formula simplification. DAG size of input: 496 DAG size of output: 469 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 12:52:20,854 WARN L293 SmtUtils]: Spent 7.35s on a formula simplification. DAG size of input: 499 DAG size of output: 472 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 12:52:29,039 WARN L293 SmtUtils]: Spent 7.25s on a formula simplification. DAG size of input: 502 DAG size of output: 475 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 12:52:37,255 WARN L293 SmtUtils]: Spent 7.21s on a formula simplification. DAG size of input: 500 DAG size of output: 473 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 12:52:45,426 WARN L293 SmtUtils]: Spent 7.24s on a formula simplification. DAG size of input: 502 DAG size of output: 475 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 12:52:53,595 WARN L293 SmtUtils]: Spent 7.19s on a formula simplification. DAG size of input: 505 DAG size of output: 478 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 12:53:01,910 WARN L293 SmtUtils]: Spent 7.35s on a formula simplification. DAG size of input: 508 DAG size of output: 481 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 12:53:10,269 WARN L293 SmtUtils]: Spent 7.37s on a formula simplification. DAG size of input: 506 DAG size of output: 479 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 12:53:18,359 WARN L293 SmtUtils]: Spent 7.13s on a formula simplification. DAG size of input: 508 DAG size of output: 481 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 12:53:26,868 WARN L293 SmtUtils]: Spent 7.43s on a formula simplification. DAG size of input: 511 DAG size of output: 484 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 12:53:35,475 WARN L293 SmtUtils]: Spent 7.45s on a formula simplification. DAG size of input: 514 DAG size of output: 487 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 12:53:44,130 WARN L293 SmtUtils]: Spent 7.46s on a formula simplification. DAG size of input: 512 DAG size of output: 485 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 12:53:52,864 WARN L293 SmtUtils]: Spent 7.51s on a formula simplification. DAG size of input: 514 DAG size of output: 487 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 12:54:01,521 WARN L293 SmtUtils]: Spent 7.41s on a formula simplification. DAG size of input: 517 DAG size of output: 490 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 12:54:10,097 WARN L293 SmtUtils]: Spent 7.29s on a formula simplification. DAG size of input: 520 DAG size of output: 493 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 12:54:18,817 WARN L293 SmtUtils]: Spent 7.42s on a formula simplification. DAG size of input: 518 DAG size of output: 491 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 12:54:27,549 WARN L293 SmtUtils]: Spent 7.39s on a formula simplification. DAG size of input: 520 DAG size of output: 493 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 12:54:36,316 WARN L293 SmtUtils]: Spent 7.54s on a formula simplification. DAG size of input: 523 DAG size of output: 496 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 12:54:45,559 WARN L293 SmtUtils]: Spent 7.85s on a formula simplification. DAG size of input: 543 DAG size of output: 516 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 12:54:54,752 WARN L293 SmtUtils]: Spent 7.85s on a formula simplification. DAG size of input: 552 DAG size of output: 519 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 12:55:14,573 WARN L293 SmtUtils]: Spent 18.39s on a formula simplification. DAG size of input: 554 DAG size of output: 501 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 12:55:23,327 WARN L293 SmtUtils]: Spent 7.49s on a formula simplification. DAG size of input: 492 DAG size of output: 465 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 12:55:28,185 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '46188#(and (= (select |#length| 15) 25) (= 9 (select |#length| 5)) (= (select |#length| 9) 21) (= (select (select |#memory_int| 28) 2) 105) (= 32 (select (select |#memory_int| 28) 0)) (= 30 (select |#length| 7)) (= (select |#valid| 30) 1) (= 1 (select |#valid| 5)) (= (select |#length| 3) 12) (= (select (select |#memory_int| 31) 2) 105) (= (select |#valid| 15) 1) (<= 0 (+ ~currentFloorID~0 2147483648)) (<= 1 |#StackHeapBarrier|) (= (select (select |#memory_int| 34) 2) 105) (= 32 (select (select |#memory_int| 34) 0)) (= ~floorButtons_3~0 0) (= 10 (select |#length| 16)) (= (select |#length| 33) 4) (= (select |#valid| 26) 1) (= (select (select |#memory_int| 26) 3) 0) (= (select (select |#memory_int| 20) 2) 0) (= 3 (select |#length| 20)) (= (select |#valid| 35) 1) (= (select |#valid| 9) 1) (= (select (select |#memory_int| 24) 1) 73) (= (select (select |#memory_int| 23) 3) 110) (= 91 (select (select |#memory_int| 18) 0)) (= (select |#length| 12) 25) (= (select (select |#memory_int| 25) 3) 0) (= 91 (select (select |#memory_int| 17) 0)) (= (select (select |#memory_int| 30) 4) 58) (= (select |#valid| 11) 1) (= (select |#valid| 27) 1) (= (select |#valid| 33) 1) (= (select (select |#memory_int| 32) 2) 105) (= 30 (select |#length| 4)) (= (select (select |#memory_int| 29) 2) 105) (= (select |#length| 28) 4) (= 4 (select |#length| 31)) (= (select |#length| 27) 4) (= (select |#length| 22) 3) (<= ~currentFloorID~0 2147483647) (= ~calls_3~0 0) (= 4 (select |#length| 26)) (= 6 (select |#length| 30)) (= ~calls_0~0 0) (= 112 (select (select |#memory_int| 22) 1)) (= (select (select |#memory_int| 17) 2) 93) (= 31 (select |#length| 2)) (= (select (select |#memory_int| 27) 3) 0) (= 76 (select (select |#memory_int| 24) 2)) (= ~head~0.offset 0) (= (select (select |#memory_int| 32) 3) 0) (= 2 (select |#length| 1)) (= (select |#length| 8) 9) (= (select (select |#memory_int| 28) 3) 0) (= (select (select |#memory_int| 29) 3) 0) (= 95 (select (select |#memory_int| 30) 2)) (= 32 (select (select |#memory_int| 30) 0)) (= (select (select |#memory_int| 30) 1) 70) (= 4 (select |#length| 25)) (= (select |#valid| 3) 1) (= (select |#valid| 7) 1) (= ~floorButtons_4~0 0) (= (select |#valid| 18) 1) (= ~calls_1~0 0) (= (select |#valid| 22) 1) (= 30 (select |#length| 13)) (= (select (select |#memory_int| 18) 3) 0) (= 2 (select |#length| 36)) (= (select (select |#memory_int| 26) 2) 105) (= (select (select |#memory_int| 34) 1) 37) (= (select (select |#memory_int| 19) 4) 0) (= (select |#valid| 24) 1) (= 30 (select |#length| 10)) (= (select (select |#memory_int| 29) 1) 37) (not (= ~landingButtons_spc1_0~0 0)) (= (select (select |#memory_int| 25) 1) 37) (= (select (select |#memory_int| 17) 3) 0) (= 4 (select |#length| 34)) (= (select |#valid| 12) 1) (= (select |#valid| 32) 1) (= (select (select |#memory_int| 31) 1) 37) (= ~floorButtons_2~0 0) (= (select |#valid| 28) 1) (= (select (select |#memory_int| 18) 2) 32) (= (select (select |#memory_int| 25) 2) 105) (= (select |#length| 17) 4) (= (select (select |#memory_int| 27) 1) 37) (= (select |#length| 35) 4) (or (and (not (= ~currentFloorID~0 0)) (not (= ~currentFloorID~0 1)) (not (= ~currentFloorID~0 4)) (exists ((v_~currentFloorID~0_143 Int) (v_continueInDirection_~tmp~19_BEFORE_RETURN_1 Int)) (and (= ~currentFloorID~0 (+ v_~currentFloorID~0_143 1)) (not (= v_~currentFloorID~0_143 4)) (= ~currentHeading~0 1) (= v_continueInDirection_~tmp~19_BEFORE_RETURN_1 0))) (not (= ~currentFloorID~0 2)) (not (= ~currentFloorID~0 3)) (= ~calls_4~0 0)) (and (not (= ~currentFloorID~0 0)) (not (= ~currentFloorID~0 1)) (not (= ~currentFloorID~0 4)) (not (= ~currentFloorID~0 2)) (not (= ~currentFloorID~0 3)) (= ~calls_4~0 0) (exists ((v_~currentFloorID~0_143 Int) (v_continueInDirection_~tmp~19_BEFORE_RETURN_2 Int)) (and (= ~currentFloorID~0 (+ v_~currentFloorID~0_143 1)) (not (= v_~currentFloorID~0_143 4)) (= ~currentHeading~0 1) (= v_continueInDirection_~tmp~19_BEFORE_RETURN_2 0))))) (= (select |#valid| 4) 1) (= 5 (select |#length| 23)) (= (select (select |#memory_int| 35) 3) 0) (= 119 (select (select |#memory_int| 23) 2)) (= 32 (select (select |#memory_int| 24) 0)) (= 32 (select (select |#memory_int| 26) 0)) (= (select (select |#memory_int| 32) 1) 37) (= (select (select |#memory_int| 28) 1) 37) (= (select (select |#memory_int| 30) 5) 0) (= (select (select |#memory_int| 22) 2) 0) (= (select (select |#memory_int| 20) 1) 105) (= (select (select |#memory_int| 33) 3) 0) (= (select |#valid| 1) 1) (= (select |#valid| 20) 1) (= 97 (select (select |#memory_int| 19) 1)) (= ~floorButtons_1~0 0) (= 32 (select (select |#memory_int| 35) 0)) (= (select |#length| 6) 21) (= (select (select |#memory_int| 36) 1) 0) (= (select (select |#memory_int| 23) 0) 100) (= (select |#valid| 21) 1) (= 7 (select |#length| 24)) (= 58 (select (select |#memory_int| 24) 5)) (= ~floorButtons_0~0 0) (= (select (select |#memory_int| 24) 6) 0) (= (select (select |#memory_int| 31) 0) 32) (= (select (select |#memory_int| 33) 1) 37) (= 32 (select (select |#memory_int| 27) 0)) (= (select |#valid| 14) 1) (= 95 (select (select |#memory_int| 24) 3)) (= 9 (select |#length| 14)) (= (select |#valid| 0) 0) (= (select (select |#memory_int| 33) 0) 32) (= (select (select |#memory_int| 35) 1) 37) (= (select |#valid| 25) 1) (= 4 (select |#length| 18)) (= ~head~0.base 0) (= (select |#length| 32) 4) (= 112 (select (select |#memory_int| 24) 4)) (= (select (select |#memory_int| 17) 1) 95) (= (select (select |#memory_int| 34) 3) 0) (= (select |#valid| 2) 1) (= (select |#valid| 36) 1) (= 9 (select |#length| 11)) (= (select |#length| 29) 4) (= (select (select |#memory_int| 1) 0) 48) (= (select |#valid| 23) 1) (= 32 (select (select |#memory_int| 29) 0)) (= (select (select |#memory_int| 26) 1) 37) (= 112 (select (select |#memory_int| 30) 3)) (= (select (select |#memory_int| 23) 4) 0) (= (select |#valid| 19) 1) (= 32 (select (select |#memory_int| 19) 3)) (= (select |#valid| 31) 1) (= (select |#valid| 34) 1) (= (select (select |#memory_int| 33) 2) 105) (= (select (select |#memory_int| 27) 2) 105) (= (select |#valid| 16) 1) (= 111 (select (select |#memory_int| 23) 1)) (= 116 (select (select |#memory_int| 19) 2)) (= (select |#valid| 6) 1) (= (select (select |#memory_int| 20) 0) 37) (= (select (select |#memory_int| 1) 1) 0) (= (select (select |#memory_int| 36) 0) 10) (= ~calls_2~0 0) (= (select |#valid| 29) 1) (= (select (select |#memory_int| 22) 0) 117) (= (select (select |#memory_int| 25) 0) 32) (= (select (select |#memory_int| 31) 3) 0) (= (select |#length| 21) 10) (= (select |#valid| 17) 1) (= 93 (select (select |#memory_int| 18) 1)) (= (select |#valid| 10) 1) (= (select |#valid| 8) 1) (= 32 (select (select |#memory_int| 19) 0)) (= (select |#length| 19) 5) (= (select |#valid| 13) 1) (= ~cleanupTimeShifts~0 12) (= (select (select |#memory_int| 35) 2) 105) (= 32 (select (select |#memory_int| 32) 0)))' at error location [2023-12-02 12:55:28,185 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 12:55:28,185 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 12:55:28,185 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 24, 20] total 55 [2023-12-02 12:55:28,185 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1983975083] [2023-12-02 12:55:28,185 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 12:55:28,186 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2023-12-02 12:55:28,186 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 12:55:28,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2023-12-02 12:55:28,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1109, Invalid=11101, Unknown=0, NotChecked=0, Total=12210 [2023-12-02 12:55:28,191 INFO L87 Difference]: Start difference. First operand 2868 states and 4509 transitions. Second operand has 55 states, 40 states have (on average 4.175) internal successors, (167), 42 states have internal predecessors, (167), 19 states have call successors, (55), 9 states have call predecessors, (55), 25 states have return successors, (56), 25 states have call predecessors, (56), 18 states have call successors, (56) [2023-12-02 12:56:02,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:56:02,609 INFO L93 Difference]: Finished difference Result 15554 states and 24490 transitions. [2023-12-02 12:56:02,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 178 states. [2023-12-02 12:56:02,610 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 40 states have (on average 4.175) internal successors, (167), 42 states have internal predecessors, (167), 19 states have call successors, (55), 9 states have call predecessors, (55), 25 states have return successors, (56), 25 states have call predecessors, (56), 18 states have call successors, (56) Word has length 118 [2023-12-02 12:56:02,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:56:02,689 INFO L225 Difference]: With dead ends: 15554 [2023-12-02 12:56:02,689 INFO L226 Difference]: Without dead ends: 12720 [2023-12-02 12:56:02,734 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 579 GetRequests, 296 SyntacticMatches, 1 SemanticMatches, 282 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31130 ImplicationChecksByTransitivity, 377.6s TimeCoverageRelationStatistics Valid=7423, Invalid=72949, Unknown=0, NotChecked=0, Total=80372 [2023-12-02 12:56:02,735 INFO L413 NwaCegarLoop]: 871 mSDtfsCounter, 9813 mSDsluCounter, 20928 mSDsCounter, 0 mSdLazyCounter, 46471 mSolverCounterSat, 4285 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 19.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9859 SdHoareTripleChecker+Valid, 21799 SdHoareTripleChecker+Invalid, 50756 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.3s SdHoareTripleChecker+Time, 4285 IncrementalHoareTripleChecker+Valid, 46471 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 22.2s IncrementalHoareTripleChecker+Time [2023-12-02 12:56:02,735 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9859 Valid, 21799 Invalid, 50756 Unknown, 0 Unchecked, 0.3s Time], IncrementalHoareTripleChecker [4285 Valid, 46471 Invalid, 0 Unknown, 0 Unchecked, 22.2s Time] [2023-12-02 12:56:02,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12720 states. [2023-12-02 12:56:03,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12720 to 11355. [2023-12-02 12:56:03,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11355 states, 8309 states have (on average 1.5361656035624023) internal successors, (12764), 8795 states have internal predecessors, (12764), 2228 states have call successors, (2228), 656 states have call predecessors, (2228), 817 states have return successors, (2762), 2110 states have call predecessors, (2762), 2223 states have call successors, (2762) [2023-12-02 12:56:03,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11355 states to 11355 states and 17754 transitions. [2023-12-02 12:56:03,869 INFO L78 Accepts]: Start accepts. Automaton has 11355 states and 17754 transitions. Word has length 118 [2023-12-02 12:56:03,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:56:03,870 INFO L495 AbstractCegarLoop]: Abstraction has 11355 states and 17754 transitions. [2023-12-02 12:56:03,870 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 40 states have (on average 4.175) internal successors, (167), 42 states have internal predecessors, (167), 19 states have call successors, (55), 9 states have call predecessors, (55), 25 states have return successors, (56), 25 states have call predecessors, (56), 18 states have call successors, (56) [2023-12-02 12:56:03,870 INFO L276 IsEmpty]: Start isEmpty. Operand 11355 states and 17754 transitions. [2023-12-02 12:56:03,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2023-12-02 12:56:03,882 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:56:03,882 INFO L195 NwaCegarLoop]: trace histogram [6, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 12:56:03,891 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dea7685-3ffa-4af8-bc53-57ad1b6bb891/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-12-02 12:56:04,083 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dea7685-3ffa-4af8-bc53-57ad1b6bb891/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 12:56:04,083 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 12:56:04,083 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:56:04,084 INFO L85 PathProgramCache]: Analyzing trace with hash 2016892851, now seen corresponding path program 1 times [2023-12-02 12:56:04,084 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 12:56:04,084 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1583413229] [2023-12-02 12:56:04,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:56:04,084 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 12:56:04,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:56:04,631 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 26 proven. 2 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2023-12-02 12:56:04,631 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 12:56:04,631 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1583413229] [2023-12-02 12:56:04,632 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1583413229] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 12:56:04,632 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1948075861] [2023-12-02 12:56:04,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:56:04,632 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 12:56:04,632 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dea7685-3ffa-4af8-bc53-57ad1b6bb891/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 12:56:04,633 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dea7685-3ffa-4af8-bc53-57ad1b6bb891/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 12:56:04,633 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dea7685-3ffa-4af8-bc53-57ad1b6bb891/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-12-02 12:56:04,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:56:04,985 INFO L262 TraceCheckSpWp]: Trace formula consists of 2102 conjuncts, 5 conjunts are in the unsatisfiable core [2023-12-02 12:56:04,991 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:56:05,163 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2023-12-02 12:56:05,163 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 12:56:05,390 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2023-12-02 12:56:05,390 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1948075861] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 12:56:05,390 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1937231688] [2023-12-02 12:56:05,394 INFO L159 IcfgInterpreter]: Started Sifa with 96 locations of interest [2023-12-02 12:56:05,394 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 12:56:05,394 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 12:56:05,394 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 12:56:05,394 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs