./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/elevator_spec2_product24.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version cf1a7837 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_1ce80fce-02df-43b2-9a65-bcc32bfdd0c4/bin/utaipan-verify-NcY6lQBIFX/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ce80fce-02df-43b2-9a65-bcc32bfdd0c4/bin/utaipan-verify-NcY6lQBIFX/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ce80fce-02df-43b2-9a65-bcc32bfdd0c4/bin/utaipan-verify-NcY6lQBIFX/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ce80fce-02df-43b2-9a65-bcc32bfdd0c4/bin/utaipan-verify-NcY6lQBIFX/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec2_product24.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ce80fce-02df-43b2-9a65-bcc32bfdd0c4/bin/utaipan-verify-NcY6lQBIFX/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ce80fce-02df-43b2-9a65-bcc32bfdd0c4/bin/utaipan-verify-NcY6lQBIFX --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 e942074e046d4b6eec963a95d600daf33500a37aba1da700aae37a309fea4cda --- Real Ultimate output --- This is Ultimate 0.2.3-dev-cf1a783 [2023-11-12 00:50:56,445 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-12 00:50:56,581 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ce80fce-02df-43b2-9a65-bcc32bfdd0c4/bin/utaipan-verify-NcY6lQBIFX/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-11-12 00:50:56,591 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-12 00:50:56,592 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-12 00:50:56,631 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-12 00:50:56,632 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-12 00:50:56,633 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-12 00:50:56,636 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-12 00:50:56,640 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-12 00:50:56,641 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-12 00:50:56,641 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-12 00:50:56,642 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-12 00:50:56,644 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-12 00:50:56,644 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-12 00:50:56,644 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-12 00:50:56,645 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-12 00:50:56,645 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-12 00:50:56,646 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-12 00:50:56,646 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-12 00:50:56,648 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-12 00:50:56,649 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-12 00:50:56,650 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-12 00:50:56,650 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-12 00:50:56,651 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-12 00:50:56,651 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-12 00:50:56,651 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-12 00:50:56,652 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-12 00:50:56,652 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-12 00:50:56,653 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-12 00:50:56,654 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-12 00:50:56,654 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-12 00:50:56,654 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-12 00:50:56,655 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-12 00:50:56,655 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-12 00:50:56,655 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-12 00:50:56,655 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 00:50:56,656 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-12 00:50:56,656 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-12 00:50:56,656 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-12 00:50:56,657 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-12 00:50:56,657 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-12 00:50:56,657 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-12 00:50:56,657 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-12 00:50:56,658 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-12 00:50:56,658 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_1ce80fce-02df-43b2-9a65-bcc32bfdd0c4/bin/utaipan-verify-NcY6lQBIFX/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ce80fce-02df-43b2-9a65-bcc32bfdd0c4/bin/utaipan-verify-NcY6lQBIFX Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e942074e046d4b6eec963a95d600daf33500a37aba1da700aae37a309fea4cda [2023-11-12 00:50:56,946 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-12 00:50:56,977 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-12 00:50:56,979 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-12 00:50:56,981 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-12 00:50:56,981 INFO L274 PluginConnector]: CDTParser initialized [2023-11-12 00:50:56,984 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ce80fce-02df-43b2-9a65-bcc32bfdd0c4/bin/utaipan-verify-NcY6lQBIFX/../../sv-benchmarks/c/product-lines/elevator_spec2_product24.cil.c [2023-11-12 00:51:00,100 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-12 00:51:00,465 INFO L384 CDTParser]: Found 1 translation units. [2023-11-12 00:51:00,470 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ce80fce-02df-43b2-9a65-bcc32bfdd0c4/sv-benchmarks/c/product-lines/elevator_spec2_product24.cil.c [2023-11-12 00:51:00,507 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ce80fce-02df-43b2-9a65-bcc32bfdd0c4/bin/utaipan-verify-NcY6lQBIFX/data/a505e08b6/da5448d165054adca8e816848c5546c9/FLAGdbb88023a [2023-11-12 00:51:00,525 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ce80fce-02df-43b2-9a65-bcc32bfdd0c4/bin/utaipan-verify-NcY6lQBIFX/data/a505e08b6/da5448d165054adca8e816848c5546c9 [2023-11-12 00:51:00,531 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-12 00:51:00,533 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-12 00:51:00,536 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-12 00:51:00,537 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-12 00:51:00,543 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-12 00:51:00,543 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 12:51:00" (1/1) ... [2023-11-12 00:51:00,545 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5e4e225e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:51:00, skipping insertion in model container [2023-11-12 00:51:00,545 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 12:51:00" (1/1) ... [2023-11-12 00:51:00,647 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-12 00:51:01,257 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_1ce80fce-02df-43b2-9a65-bcc32bfdd0c4/sv-benchmarks/c/product-lines/elevator_spec2_product24.cil.c[63703,63716] [2023-11-12 00:51:01,301 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 00:51:01,323 INFO L202 MainTranslator]: Completed pre-run [2023-11-12 00:51:01,337 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Floor.i","") [48] [2023-11-12 00:51:01,339 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Elevator.i","") [716] [2023-11-12 00:51:01,340 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Specification2_spec.i","") [2374] [2023-11-12 00:51:01,341 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Test.i","") [2556] [2023-11-12 00:51:01,341 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Person.i","") [2912] [2023-11-12 00:51:01,342 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"scenario.i","") [3030] [2023-11-12 00:51:01,342 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"featureselect.i","") [3042] [2023-11-12 00:51:01,342 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"wsllib_check.i","") [3077] [2023-11-12 00:51:01,343 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"UnitTests.i","") [3086] [2023-11-12 00:51:01,343 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"libacc.i","") [3177] [2023-11-12 00:51:01,485 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_1ce80fce-02df-43b2-9a65-bcc32bfdd0c4/sv-benchmarks/c/product-lines/elevator_spec2_product24.cil.c[63703,63716] [2023-11-12 00:51:01,502 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 00:51:01,535 INFO L206 MainTranslator]: Completed translation [2023-11-12 00:51:01,536 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:51:01 WrapperNode [2023-11-12 00:51:01,536 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-12 00:51:01,537 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-12 00:51:01,537 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-12 00:51:01,537 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-12 00:51:01,543 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:51:01" (1/1) ... [2023-11-12 00:51:01,575 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:51:01" (1/1) ... [2023-11-12 00:51:01,648 INFO L138 Inliner]: procedures = 98, calls = 353, calls flagged for inlining = 27, calls inlined = 23, statements flattened = 936 [2023-11-12 00:51:01,648 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-12 00:51:01,649 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-12 00:51:01,650 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-12 00:51:01,650 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-12 00:51:01,661 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:51:01" (1/1) ... [2023-11-12 00:51:01,661 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:51:01" (1/1) ... [2023-11-12 00:51:01,671 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:51:01" (1/1) ... [2023-11-12 00:51:01,671 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:51:01" (1/1) ... [2023-11-12 00:51:01,697 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:51:01" (1/1) ... [2023-11-12 00:51:01,729 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:51:01" (1/1) ... [2023-11-12 00:51:01,735 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:51:01" (1/1) ... [2023-11-12 00:51:01,754 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:51:01" (1/1) ... [2023-11-12 00:51:01,777 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-12 00:51:01,778 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-12 00:51:01,791 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-12 00:51:01,792 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-12 00:51:01,793 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:51:01" (1/1) ... [2023-11-12 00:51:01,800 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 00:51:01,826 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ce80fce-02df-43b2-9a65-bcc32bfdd0c4/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:51:01,845 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ce80fce-02df-43b2-9a65-bcc32bfdd0c4/bin/utaipan-verify-NcY6lQBIFX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-12 00:51:01,876 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ce80fce-02df-43b2-9a65-bcc32bfdd0c4/bin/utaipan-verify-NcY6lQBIFX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-12 00:51:01,886 INFO L130 BoogieDeclarations]: Found specification of procedure bigMacCall [2023-11-12 00:51:01,886 INFO L138 BoogieDeclarations]: Found implementation of procedure bigMacCall [2023-11-12 00:51:01,887 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2023-11-12 00:51:01,887 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2023-11-12 00:51:01,887 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2023-11-12 00:51:01,887 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2023-11-12 00:51:01,888 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2023-11-12 00:51:01,889 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2023-11-12 00:51:01,889 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2023-11-12 00:51:01,889 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2023-11-12 00:51:01,890 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2023-11-12 00:51:01,890 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2023-11-12 00:51:01,891 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2023-11-12 00:51:01,891 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2023-11-12 00:51:01,892 INFO L130 BoogieDeclarations]: Found specification of procedure buttonForFloorIsPressed [2023-11-12 00:51:01,892 INFO L138 BoogieDeclarations]: Found implementation of procedure buttonForFloorIsPressed [2023-11-12 00:51:01,892 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2023-11-12 00:51:01,893 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2023-11-12 00:51:01,895 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2023-11-12 00:51:01,895 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2023-11-12 00:51:01,895 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-12 00:51:01,895 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor__wrappee__twothirdsfull [2023-11-12 00:51:01,896 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor__wrappee__twothirdsfull [2023-11-12 00:51:01,896 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2023-11-12 00:51:01,896 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2023-11-12 00:51:01,896 INFO L130 BoogieDeclarations]: Found specification of procedure isExecutiveFloorCalling [2023-11-12 00:51:01,896 INFO L138 BoogieDeclarations]: Found implementation of procedure isExecutiveFloorCalling [2023-11-12 00:51:01,897 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2023-11-12 00:51:01,897 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2023-11-12 00:51:01,897 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2023-11-12 00:51:01,897 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2023-11-12 00:51:01,897 INFO L130 BoogieDeclarations]: Found specification of procedure areDoorsOpen [2023-11-12 00:51:01,897 INFO L138 BoogieDeclarations]: Found implementation of procedure areDoorsOpen [2023-11-12 00:51:01,898 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2023-11-12 00:51:01,898 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2023-11-12 00:51:01,898 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2023-11-12 00:51:01,899 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2023-11-12 00:51:01,899 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2023-11-12 00:51:01,899 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2023-11-12 00:51:01,899 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2023-11-12 00:51:01,900 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2023-11-12 00:51:01,900 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2023-11-12 00:51:01,900 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2023-11-12 00:51:01,900 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2023-11-12 00:51:01,900 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2023-11-12 00:51:01,900 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2023-11-12 00:51:01,901 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2023-11-12 00:51:01,901 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-12 00:51:01,901 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2023-11-12 00:51:01,901 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2023-11-12 00:51:01,902 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection__wrappee__weight [2023-11-12 00:51:01,903 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection__wrappee__weight [2023-11-12 00:51:01,903 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-12 00:51:01,904 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-12 00:51:01,904 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2023-11-12 00:51:01,904 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2023-11-12 00:51:01,904 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift__wrappee__executivefloor [2023-11-12 00:51:01,905 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift__wrappee__executivefloor [2023-11-12 00:51:02,112 INFO L236 CfgBuilder]: Building ICFG [2023-11-12 00:51:02,115 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-12 00:51:03,530 INFO L277 CfgBuilder]: Performing block encoding [2023-11-12 00:51:04,561 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-12 00:51:04,562 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-12 00:51:04,568 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 12:51:04 BoogieIcfgContainer [2023-11-12 00:51:04,568 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-12 00:51:04,572 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-12 00:51:04,572 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-12 00:51:04,576 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-12 00:51:04,576 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 12:51:00" (1/3) ... [2023-11-12 00:51:04,577 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7435ea4d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 12:51:04, skipping insertion in model container [2023-11-12 00:51:04,578 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:51:01" (2/3) ... [2023-11-12 00:51:04,579 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7435ea4d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 12:51:04, skipping insertion in model container [2023-11-12 00:51:04,580 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 12:51:04" (3/3) ... [2023-11-12 00:51:04,581 INFO L112 eAbstractionObserver]: Analyzing ICFG elevator_spec2_product24.cil.c [2023-11-12 00:51:04,602 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-12 00:51:04,603 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-12 00:51:04,694 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-12 00:51:04,703 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;@22ef255, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-12 00:51:04,704 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-12 00:51:04,714 INFO L276 IsEmpty]: Start isEmpty. Operand has 406 states, 272 states have (on average 1.5735294117647058) internal successors, (428), 295 states have internal predecessors, (428), 105 states have call successors, (105), 27 states have call predecessors, (105), 27 states have return successors, (105), 98 states have call predecessors, (105), 105 states have call successors, (105) [2023-11-12 00:51:04,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-11-12 00:51:04,735 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:51:04,735 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:51:04,736 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:51:04,744 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:51:04,745 INFO L85 PathProgramCache]: Analyzing trace with hash -21517909, now seen corresponding path program 1 times [2023-11-12 00:51:04,755 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:51:04,756 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1440817308] [2023-11-12 00:51:04,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:51:04,757 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:51:05,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:51:05,222 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:51:05,223 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:51:05,223 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1440817308] [2023-11-12 00:51:05,224 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1440817308] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:51:05,224 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:51:05,224 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-12 00:51:05,226 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2018369304] [2023-11-12 00:51:05,227 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:51:05,231 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-12 00:51:05,233 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:51:05,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-12 00:51:05,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-12 00:51:05,281 INFO L87 Difference]: Start difference. First operand has 406 states, 272 states have (on average 1.5735294117647058) internal successors, (428), 295 states have internal predecessors, (428), 105 states have call successors, (105), 27 states have call predecessors, (105), 27 states have return successors, (105), 98 states have call predecessors, (105), 105 states have call successors, (105) Second operand has 2 states, 2 states have (on average 14.0) internal successors, (28), 2 states have internal predecessors, (28), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) [2023-11-12 00:51:05,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:51:05,517 INFO L93 Difference]: Finished difference Result 424 states and 665 transitions. [2023-11-12 00:51:05,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-12 00:51:05,520 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 14.0) internal successors, (28), 2 states have internal predecessors, (28), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) Word has length 43 [2023-11-12 00:51:05,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:51:05,549 INFO L225 Difference]: With dead ends: 424 [2023-11-12 00:51:05,549 INFO L226 Difference]: Without dead ends: 402 [2023-11-12 00:51:05,554 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-12 00:51:05,559 INFO L413 NwaCegarLoop]: 593 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 593 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-12 00:51:05,560 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 593 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-12 00:51:05,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 402 states. [2023-11-12 00:51:05,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 402 to 402. [2023-11-12 00:51:05,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 402 states, 270 states have (on average 1.5629629629629629) internal successors, (422), 291 states have internal predecessors, (422), 105 states have call successors, (105), 27 states have call predecessors, (105), 26 states have return successors, (100), 97 states have call predecessors, (100), 100 states have call successors, (100) [2023-11-12 00:51:05,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 402 states to 402 states and 627 transitions. [2023-11-12 00:51:05,669 INFO L78 Accepts]: Start accepts. Automaton has 402 states and 627 transitions. Word has length 43 [2023-11-12 00:51:05,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:51:05,671 INFO L495 AbstractCegarLoop]: Abstraction has 402 states and 627 transitions. [2023-11-12 00:51:05,671 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 14.0) internal successors, (28), 2 states have internal predecessors, (28), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) [2023-11-12 00:51:05,671 INFO L276 IsEmpty]: Start isEmpty. Operand 402 states and 627 transitions. [2023-11-12 00:51:05,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2023-11-12 00:51:05,676 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:51:05,676 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:51:05,676 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-12 00:51:05,676 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:51:05,677 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:51:05,677 INFO L85 PathProgramCache]: Analyzing trace with hash 1006208728, now seen corresponding path program 1 times [2023-11-12 00:51:05,678 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:51:05,678 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1942132467] [2023-11-12 00:51:05,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:51:05,678 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:51:05,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:51:06,300 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:51:06,301 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:51:06,304 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1942132467] [2023-11-12 00:51:06,305 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1942132467] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:51:06,306 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:51:06,306 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-12 00:51:06,307 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1835551442] [2023-11-12 00:51:06,307 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:51:06,310 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-12 00:51:06,310 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:51:06,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-12 00:51:06,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-12 00:51:06,319 INFO L87 Difference]: Start difference. First operand 402 states and 627 transitions. Second operand has 6 states, 6 states have (on average 4.833333333333333) internal successors, (29), 6 states have internal predecessors, (29), 6 states have call successors, (8), 4 states have call predecessors, (8), 2 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2023-11-12 00:51:08,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:51:08,901 INFO L93 Difference]: Finished difference Result 1312 states and 2089 transitions. [2023-11-12 00:51:08,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-12 00:51:08,902 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.833333333333333) internal successors, (29), 6 states have internal predecessors, (29), 6 states have call successors, (8), 4 states have call predecessors, (8), 2 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) Word has length 44 [2023-11-12 00:51:08,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:51:08,918 INFO L225 Difference]: With dead ends: 1312 [2023-11-12 00:51:08,918 INFO L226 Difference]: Without dead ends: 926 [2023-11-12 00:51:08,930 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2023-11-12 00:51:08,933 INFO L413 NwaCegarLoop]: 294 mSDtfsCounter, 1288 mSDsluCounter, 713 mSDsCounter, 0 mSdLazyCounter, 1499 mSolverCounterSat, 471 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1362 SdHoareTripleChecker+Valid, 1007 SdHoareTripleChecker+Invalid, 1970 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 471 IncrementalHoareTripleChecker+Valid, 1499 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2023-11-12 00:51:08,934 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1362 Valid, 1007 Invalid, 1970 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [471 Valid, 1499 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2023-11-12 00:51:08,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 926 states. [2023-11-12 00:51:09,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 926 to 839. [2023-11-12 00:51:09,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 839 states, 586 states have (on average 1.5853242320819112) internal successors, (929), 616 states have internal predecessors, (929), 204 states have call successors, (204), 47 states have call predecessors, (204), 48 states have return successors, (206), 188 states have call predecessors, (206), 199 states have call successors, (206) [2023-11-12 00:51:09,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 839 states to 839 states and 1339 transitions. [2023-11-12 00:51:09,081 INFO L78 Accepts]: Start accepts. Automaton has 839 states and 1339 transitions. Word has length 44 [2023-11-12 00:51:09,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:51:09,082 INFO L495 AbstractCegarLoop]: Abstraction has 839 states and 1339 transitions. [2023-11-12 00:51:09,082 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.833333333333333) internal successors, (29), 6 states have internal predecessors, (29), 6 states have call successors, (8), 4 states have call predecessors, (8), 2 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2023-11-12 00:51:09,082 INFO L276 IsEmpty]: Start isEmpty. Operand 839 states and 1339 transitions. [2023-11-12 00:51:09,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2023-11-12 00:51:09,094 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:51:09,094 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] [2023-11-12 00:51:09,095 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-12 00:51:09,095 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:51:09,095 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:51:09,096 INFO L85 PathProgramCache]: Analyzing trace with hash -1895530835, now seen corresponding path program 1 times [2023-11-12 00:51:09,096 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:51:09,096 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [807991391] [2023-11-12 00:51:09,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:51:09,096 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:51:09,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:51:09,734 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-12 00:51:09,734 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:51:09,734 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [807991391] [2023-11-12 00:51:09,735 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [807991391] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:51:09,735 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:51:09,735 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-11-12 00:51:09,735 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [692642325] [2023-11-12 00:51:09,736 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:51:09,736 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-12 00:51:09,737 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:51:09,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-12 00:51:09,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2023-11-12 00:51:09,738 INFO L87 Difference]: Start difference. First operand 839 states and 1339 transitions. Second operand has 9 states, 7 states have (on average 7.0) internal successors, (49), 8 states have internal predecessors, (49), 5 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 5 states have call predecessors, (15), 4 states have call successors, (15) [2023-11-12 00:51:13,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:51:13,646 INFO L93 Difference]: Finished difference Result 2489 states and 3984 transitions. [2023-11-12 00:51:13,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-11-12 00:51:13,647 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 7.0) internal successors, (49), 8 states have internal predecessors, (49), 5 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 5 states have call predecessors, (15), 4 states have call successors, (15) Word has length 87 [2023-11-12 00:51:13,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:51:13,664 INFO L225 Difference]: With dead ends: 2489 [2023-11-12 00:51:13,664 INFO L226 Difference]: Without dead ends: 1666 [2023-11-12 00:51:13,675 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2023-11-12 00:51:13,681 INFO L413 NwaCegarLoop]: 592 mSDtfsCounter, 1059 mSDsluCounter, 2232 mSDsCounter, 0 mSdLazyCounter, 5321 mSolverCounterSat, 323 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1133 SdHoareTripleChecker+Valid, 2824 SdHoareTripleChecker+Invalid, 5644 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 323 IncrementalHoareTripleChecker+Valid, 5321 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2023-11-12 00:51:13,682 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1133 Valid, 2824 Invalid, 5644 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [323 Valid, 5321 Invalid, 0 Unknown, 0 Unchecked, 3.5s Time] [2023-11-12 00:51:13,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1666 states. [2023-11-12 00:51:13,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1666 to 1648. [2023-11-12 00:51:13,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1648 states, 1143 states have (on average 1.5695538057742782) internal successors, (1794), 1194 states have internal predecessors, (1794), 410 states have call successors, (410), 83 states have call predecessors, (410), 94 states have return successors, (429), 392 states have call predecessors, (429), 405 states have call successors, (429) [2023-11-12 00:51:13,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1648 states to 1648 states and 2633 transitions. [2023-11-12 00:51:13,899 INFO L78 Accepts]: Start accepts. Automaton has 1648 states and 2633 transitions. Word has length 87 [2023-11-12 00:51:13,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:51:13,901 INFO L495 AbstractCegarLoop]: Abstraction has 1648 states and 2633 transitions. [2023-11-12 00:51:13,901 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 7.0) internal successors, (49), 8 states have internal predecessors, (49), 5 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 5 states have call predecessors, (15), 4 states have call successors, (15) [2023-11-12 00:51:13,902 INFO L276 IsEmpty]: Start isEmpty. Operand 1648 states and 2633 transitions. [2023-11-12 00:51:13,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2023-11-12 00:51:13,907 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:51:13,908 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] [2023-11-12 00:51:13,908 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-12 00:51:13,908 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:51:13,909 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:51:13,910 INFO L85 PathProgramCache]: Analyzing trace with hash 769734355, now seen corresponding path program 1 times [2023-11-12 00:51:13,910 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:51:13,910 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [855402088] [2023-11-12 00:51:13,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:51:13,910 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:51:13,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:51:14,394 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-12 00:51:14,394 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:51:14,395 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [855402088] [2023-11-12 00:51:14,395 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [855402088] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:51:14,395 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:51:14,395 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-12 00:51:14,395 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [375918009] [2023-11-12 00:51:14,396 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:51:14,397 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-12 00:51:14,398 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:51:14,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-12 00:51:14,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-12 00:51:14,399 INFO L87 Difference]: Start difference. First operand 1648 states and 2633 transitions. Second operand has 7 states, 7 states have (on average 7.142857142857143) internal successors, (50), 7 states have internal predecessors, (50), 5 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 5 states have call predecessors, (15), 4 states have call successors, (15) [2023-11-12 00:51:17,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:51:17,022 INFO L93 Difference]: Finished difference Result 4267 states and 6829 transitions. [2023-11-12 00:51:17,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-12 00:51:17,023 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.142857142857143) internal successors, (50), 7 states have internal predecessors, (50), 5 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 5 states have call predecessors, (15), 4 states have call successors, (15) Word has length 88 [2023-11-12 00:51:17,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:51:17,045 INFO L225 Difference]: With dead ends: 4267 [2023-11-12 00:51:17,046 INFO L226 Difference]: Without dead ends: 2637 [2023-11-12 00:51:17,056 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2023-11-12 00:51:17,057 INFO L413 NwaCegarLoop]: 385 mSDtfsCounter, 1221 mSDsluCounter, 1268 mSDsCounter, 0 mSdLazyCounter, 2366 mSolverCounterSat, 459 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1304 SdHoareTripleChecker+Valid, 1653 SdHoareTripleChecker+Invalid, 2825 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 459 IncrementalHoareTripleChecker+Valid, 2366 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2023-11-12 00:51:17,058 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1304 Valid, 1653 Invalid, 2825 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [459 Valid, 2366 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2023-11-12 00:51:17,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2637 states. [2023-11-12 00:51:17,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2637 to 2546. [2023-11-12 00:51:17,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2546 states, 1777 states have (on average 1.5728756330894766) internal successors, (2795), 1855 states have internal predecessors, (2795), 612 states have call successors, (612), 137 states have call predecessors, (612), 156 states have return successors, (657), 586 states have call predecessors, (657), 607 states have call successors, (657) [2023-11-12 00:51:17,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2546 states to 2546 states and 4064 transitions. [2023-11-12 00:51:17,317 INFO L78 Accepts]: Start accepts. Automaton has 2546 states and 4064 transitions. Word has length 88 [2023-11-12 00:51:17,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:51:17,318 INFO L495 AbstractCegarLoop]: Abstraction has 2546 states and 4064 transitions. [2023-11-12 00:51:17,318 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.142857142857143) internal successors, (50), 7 states have internal predecessors, (50), 5 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 5 states have call predecessors, (15), 4 states have call successors, (15) [2023-11-12 00:51:17,319 INFO L276 IsEmpty]: Start isEmpty. Operand 2546 states and 4064 transitions. [2023-11-12 00:51:17,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2023-11-12 00:51:17,322 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:51:17,323 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] [2023-11-12 00:51:17,323 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-12 00:51:17,323 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:51:17,323 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:51:17,324 INFO L85 PathProgramCache]: Analyzing trace with hash 1797810284, now seen corresponding path program 1 times [2023-11-12 00:51:17,324 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:51:17,325 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [219834805] [2023-11-12 00:51:17,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:51:17,329 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:51:17,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:51:17,661 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-12 00:51:17,662 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:51:17,662 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [219834805] [2023-11-12 00:51:17,662 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [219834805] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:51:17,662 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:51:17,662 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-12 00:51:17,662 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1952007096] [2023-11-12 00:51:17,663 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:51:17,663 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-12 00:51:17,663 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:51:17,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-12 00:51:17,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-12 00:51:17,665 INFO L87 Difference]: Start difference. First operand 2546 states and 4064 transitions. Second operand has 6 states, 6 states have (on average 8.666666666666666) internal successors, (52), 6 states have internal predecessors, (52), 3 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 3 states have call predecessors, (16), 2 states have call successors, (16) [2023-11-12 00:51:18,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:51:18,319 INFO L93 Difference]: Finished difference Result 2647 states and 4232 transitions. [2023-11-12 00:51:18,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-12 00:51:18,320 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.666666666666666) internal successors, (52), 6 states have internal predecessors, (52), 3 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 3 states have call predecessors, (16), 2 states have call successors, (16) Word has length 92 [2023-11-12 00:51:18,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:51:18,342 INFO L225 Difference]: With dead ends: 2647 [2023-11-12 00:51:18,342 INFO L226 Difference]: Without dead ends: 2632 [2023-11-12 00:51:18,345 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2023-11-12 00:51:18,346 INFO L413 NwaCegarLoop]: 582 mSDtfsCounter, 720 mSDsluCounter, 970 mSDsCounter, 0 mSdLazyCounter, 329 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 721 SdHoareTripleChecker+Valid, 1552 SdHoareTripleChecker+Invalid, 351 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 329 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-12 00:51:18,346 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [721 Valid, 1552 Invalid, 351 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 329 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-12 00:51:18,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2632 states. [2023-11-12 00:51:18,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2632 to 2552. [2023-11-12 00:51:18,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2552 states, 1783 states have (on average 1.5709478407178912) internal successors, (2801), 1861 states have internal predecessors, (2801), 612 states have call successors, (612), 137 states have call predecessors, (612), 156 states have return successors, (657), 586 states have call predecessors, (657), 607 states have call successors, (657) [2023-11-12 00:51:18,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2552 states to 2552 states and 4070 transitions. [2023-11-12 00:51:18,609 INFO L78 Accepts]: Start accepts. Automaton has 2552 states and 4070 transitions. Word has length 92 [2023-11-12 00:51:18,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:51:18,610 INFO L495 AbstractCegarLoop]: Abstraction has 2552 states and 4070 transitions. [2023-11-12 00:51:18,610 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.666666666666666) internal successors, (52), 6 states have internal predecessors, (52), 3 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 3 states have call predecessors, (16), 2 states have call successors, (16) [2023-11-12 00:51:18,610 INFO L276 IsEmpty]: Start isEmpty. Operand 2552 states and 4070 transitions. [2023-11-12 00:51:18,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2023-11-12 00:51:18,614 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:51:18,615 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] [2023-11-12 00:51:18,615 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-12 00:51:18,615 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:51:18,616 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:51:18,616 INFO L85 PathProgramCache]: Analyzing trace with hash 2003675615, now seen corresponding path program 1 times [2023-11-12 00:51:18,616 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:51:18,616 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [792945321] [2023-11-12 00:51:18,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:51:18,617 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:51:18,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:51:18,936 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-12 00:51:18,936 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:51:18,936 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [792945321] [2023-11-12 00:51:18,936 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [792945321] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:51:18,937 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:51:18,937 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-12 00:51:18,937 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [792566543] [2023-11-12 00:51:18,937 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:51:18,938 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-12 00:51:18,938 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:51:18,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-12 00:51:18,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-12 00:51:18,939 INFO L87 Difference]: Start difference. First operand 2552 states and 4070 transitions. Second operand has 7 states, 6 states have (on average 9.166666666666666) internal successors, (55), 6 states have internal predecessors, (55), 3 states have call successors, (18), 2 states have call predecessors, (18), 4 states have return successors, (17), 4 states have call predecessors, (17), 2 states have call successors, (17) [2023-11-12 00:51:19,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:51:19,848 INFO L93 Difference]: Finished difference Result 2697 states and 4275 transitions. [2023-11-12 00:51:19,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-12 00:51:19,849 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 9.166666666666666) internal successors, (55), 6 states have internal predecessors, (55), 3 states have call successors, (18), 2 states have call predecessors, (18), 4 states have return successors, (17), 4 states have call predecessors, (17), 2 states have call successors, (17) Word has length 97 [2023-11-12 00:51:19,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:51:19,874 INFO L225 Difference]: With dead ends: 2697 [2023-11-12 00:51:19,874 INFO L226 Difference]: Without dead ends: 2682 [2023-11-12 00:51:19,877 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2023-11-12 00:51:19,878 INFO L413 NwaCegarLoop]: 586 mSDtfsCounter, 654 mSDsluCounter, 2241 mSDsCounter, 0 mSdLazyCounter, 435 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 656 SdHoareTripleChecker+Valid, 2827 SdHoareTripleChecker+Invalid, 463 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 435 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-12 00:51:19,879 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [656 Valid, 2827 Invalid, 463 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 435 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-12 00:51:19,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2682 states. [2023-11-12 00:51:20,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2682 to 2628. [2023-11-12 00:51:20,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2628 states, 1835 states have (on average 1.5634877384196186) internal successors, (2869), 1913 states have internal predecessors, (2869), 628 states have call successors, (628), 145 states have call predecessors, (628), 164 states have return successors, (683), 602 states have call predecessors, (683), 623 states have call successors, (683) [2023-11-12 00:51:20,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2628 states to 2628 states and 4180 transitions. [2023-11-12 00:51:20,166 INFO L78 Accepts]: Start accepts. Automaton has 2628 states and 4180 transitions. Word has length 97 [2023-11-12 00:51:20,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:51:20,167 INFO L495 AbstractCegarLoop]: Abstraction has 2628 states and 4180 transitions. [2023-11-12 00:51:20,167 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 9.166666666666666) internal successors, (55), 6 states have internal predecessors, (55), 3 states have call successors, (18), 2 states have call predecessors, (18), 4 states have return successors, (17), 4 states have call predecessors, (17), 2 states have call successors, (17) [2023-11-12 00:51:20,167 INFO L276 IsEmpty]: Start isEmpty. Operand 2628 states and 4180 transitions. [2023-11-12 00:51:20,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2023-11-12 00:51:20,173 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:51:20,173 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 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] [2023-11-12 00:51:20,174 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-12 00:51:20,174 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:51:20,174 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:51:20,174 INFO L85 PathProgramCache]: Analyzing trace with hash 3618192, now seen corresponding path program 1 times [2023-11-12 00:51:20,174 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:51:20,176 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1359025476] [2023-11-12 00:51:20,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:51:20,176 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:51:20,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:51:20,538 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-11-12 00:51:20,538 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:51:20,538 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1359025476] [2023-11-12 00:51:20,538 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1359025476] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:51:20,539 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:51:20,539 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-12 00:51:20,539 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1452927231] [2023-11-12 00:51:20,539 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:51:20,540 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-12 00:51:20,540 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:51:20,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-12 00:51:20,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-12 00:51:20,541 INFO L87 Difference]: Start difference. First operand 2628 states and 4180 transitions. Second operand has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 4 states have call successors, (19), 3 states have call predecessors, (19), 2 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) [2023-11-12 00:51:22,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:51:22,498 INFO L93 Difference]: Finished difference Result 7108 states and 11509 transitions. [2023-11-12 00:51:22,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-12 00:51:22,499 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 4 states have call successors, (19), 3 states have call predecessors, (19), 2 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) Word has length 104 [2023-11-12 00:51:22,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:51:22,538 INFO L225 Difference]: With dead ends: 7108 [2023-11-12 00:51:22,539 INFO L226 Difference]: Without dead ends: 4496 [2023-11-12 00:51:22,558 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-12 00:51:22,560 INFO L413 NwaCegarLoop]: 312 mSDtfsCounter, 1230 mSDsluCounter, 392 mSDsCounter, 0 mSdLazyCounter, 924 mSolverCounterSat, 400 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1308 SdHoareTripleChecker+Valid, 704 SdHoareTripleChecker+Invalid, 1324 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 400 IncrementalHoareTripleChecker+Valid, 924 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2023-11-12 00:51:22,560 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1308 Valid, 704 Invalid, 1324 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [400 Valid, 924 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2023-11-12 00:51:22,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4496 states. [2023-11-12 00:51:22,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4496 to 4133. [2023-11-12 00:51:22,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4133 states, 2891 states have (on average 1.5569007263922519) internal successors, (4501), 3021 states have internal predecessors, (4501), 976 states have call successors, (976), 221 states have call predecessors, (976), 265 states have return successors, (1132), 935 states have call predecessors, (1132), 971 states have call successors, (1132) [2023-11-12 00:51:23,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4133 states to 4133 states and 6609 transitions. [2023-11-12 00:51:23,006 INFO L78 Accepts]: Start accepts. Automaton has 4133 states and 6609 transitions. Word has length 104 [2023-11-12 00:51:23,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:51:23,007 INFO L495 AbstractCegarLoop]: Abstraction has 4133 states and 6609 transitions. [2023-11-12 00:51:23,008 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 4 states have call successors, (19), 3 states have call predecessors, (19), 2 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) [2023-11-12 00:51:23,008 INFO L276 IsEmpty]: Start isEmpty. Operand 4133 states and 6609 transitions. [2023-11-12 00:51:23,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2023-11-12 00:51:23,013 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:51:23,014 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 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] [2023-11-12 00:51:23,014 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-12 00:51:23,014 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:51:23,014 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:51:23,015 INFO L85 PathProgramCache]: Analyzing trace with hash 111871861, now seen corresponding path program 1 times [2023-11-12 00:51:23,015 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:51:23,015 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1308292316] [2023-11-12 00:51:23,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:51:23,015 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:51:23,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:51:23,358 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-11-12 00:51:23,359 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:51:23,359 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1308292316] [2023-11-12 00:51:23,359 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1308292316] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:51:23,359 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:51:23,359 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-12 00:51:23,360 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [717555639] [2023-11-12 00:51:23,360 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:51:23,360 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-12 00:51:23,360 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:51:23,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-12 00:51:23,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-12 00:51:23,361 INFO L87 Difference]: Start difference. First operand 4133 states and 6609 transitions. Second operand has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 4 states have call successors, (19), 3 states have call predecessors, (19), 2 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) [2023-11-12 00:51:25,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:51:25,654 INFO L93 Difference]: Finished difference Result 11577 states and 19028 transitions. [2023-11-12 00:51:25,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-12 00:51:25,655 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 4 states have call successors, (19), 3 states have call predecessors, (19), 2 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) Word has length 105 [2023-11-12 00:51:25,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:51:25,717 INFO L225 Difference]: With dead ends: 11577 [2023-11-12 00:51:25,717 INFO L226 Difference]: Without dead ends: 7463 [2023-11-12 00:51:25,748 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-12 00:51:25,750 INFO L413 NwaCegarLoop]: 325 mSDtfsCounter, 1217 mSDsluCounter, 392 mSDsCounter, 0 mSdLazyCounter, 925 mSolverCounterSat, 398 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1294 SdHoareTripleChecker+Valid, 717 SdHoareTripleChecker+Invalid, 1323 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 398 IncrementalHoareTripleChecker+Valid, 925 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2023-11-12 00:51:25,750 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1294 Valid, 717 Invalid, 1323 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [398 Valid, 925 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2023-11-12 00:51:25,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7463 states. [2023-11-12 00:51:26,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7463 to 6992. [2023-11-12 00:51:26,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6992 states, 4900 states have (on average 1.553265306122449) internal successors, (7611), 5148 states have internal predecessors, (7611), 1622 states have call successors, (1622), 373 states have call predecessors, (1622), 469 states have return successors, (2084), 1545 states have call predecessors, (2084), 1617 states have call successors, (2084) [2023-11-12 00:51:26,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6992 states to 6992 states and 11317 transitions. [2023-11-12 00:51:26,616 INFO L78 Accepts]: Start accepts. Automaton has 6992 states and 11317 transitions. Word has length 105 [2023-11-12 00:51:26,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:51:26,617 INFO L495 AbstractCegarLoop]: Abstraction has 6992 states and 11317 transitions. [2023-11-12 00:51:26,617 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 4 states have call successors, (19), 3 states have call predecessors, (19), 2 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) [2023-11-12 00:51:26,617 INFO L276 IsEmpty]: Start isEmpty. Operand 6992 states and 11317 transitions. [2023-11-12 00:51:26,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2023-11-12 00:51:26,622 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:51:26,622 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 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] [2023-11-12 00:51:26,622 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-12 00:51:26,622 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:51:26,623 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:51:26,623 INFO L85 PathProgramCache]: Analyzing trace with hash -827227790, now seen corresponding path program 1 times [2023-11-12 00:51:26,623 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:51:26,623 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [162109611] [2023-11-12 00:51:26,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:51:26,624 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:51:26,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:51:26,911 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-11-12 00:51:26,911 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:51:26,911 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [162109611] [2023-11-12 00:51:26,911 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [162109611] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:51:26,911 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:51:26,912 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-12 00:51:26,912 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1506578996] [2023-11-12 00:51:26,912 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:51:26,913 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-12 00:51:26,913 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:51:26,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-12 00:51:26,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-12 00:51:26,914 INFO L87 Difference]: Start difference. First operand 6992 states and 11317 transitions. Second operand has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 4 states have call successors, (19), 3 states have call predecessors, (19), 2 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) [2023-11-12 00:51:29,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:51:29,768 INFO L93 Difference]: Finished difference Result 20336 states and 34435 transitions. [2023-11-12 00:51:29,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-12 00:51:29,770 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 4 states have call successors, (19), 3 states have call predecessors, (19), 2 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) Word has length 106 [2023-11-12 00:51:29,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:51:29,887 INFO L225 Difference]: With dead ends: 20336 [2023-11-12 00:51:29,890 INFO L226 Difference]: Without dead ends: 13369 [2023-11-12 00:51:29,947 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-12 00:51:29,950 INFO L413 NwaCegarLoop]: 338 mSDtfsCounter, 1204 mSDsluCounter, 392 mSDsCounter, 0 mSdLazyCounter, 924 mSolverCounterSat, 396 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1280 SdHoareTripleChecker+Valid, 730 SdHoareTripleChecker+Invalid, 1320 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 396 IncrementalHoareTripleChecker+Valid, 924 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2023-11-12 00:51:29,950 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1280 Valid, 730 Invalid, 1320 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [396 Valid, 924 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2023-11-12 00:51:29,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13369 states. [2023-11-12 00:51:31,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13369 to 12653. [2023-11-12 00:51:31,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12653 states, 8867 states have (on average 1.547874140069922) internal successors, (13725), 9367 states have internal predecessors, (13725), 2892 states have call successors, (2892), 677 states have call predecessors, (2892), 893 states have return successors, (4350), 2743 states have call predecessors, (4350), 2887 states have call successors, (4350) [2023-11-12 00:51:31,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12653 states to 12653 states and 20967 transitions. [2023-11-12 00:51:31,440 INFO L78 Accepts]: Start accepts. Automaton has 12653 states and 20967 transitions. Word has length 106 [2023-11-12 00:51:31,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:51:31,441 INFO L495 AbstractCegarLoop]: Abstraction has 12653 states and 20967 transitions. [2023-11-12 00:51:31,442 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 4 states have call successors, (19), 3 states have call predecessors, (19), 2 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) [2023-11-12 00:51:31,442 INFO L276 IsEmpty]: Start isEmpty. Operand 12653 states and 20967 transitions. [2023-11-12 00:51:31,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2023-11-12 00:51:31,446 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:51:31,447 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:51:31,447 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-12 00:51:31,447 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:51:31,452 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:51:31,452 INFO L85 PathProgramCache]: Analyzing trace with hash 125458007, now seen corresponding path program 1 times [2023-11-12 00:51:31,452 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:51:31,453 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [489296713] [2023-11-12 00:51:31,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:51:31,453 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:51:31,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:51:31,950 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-11-12 00:51:31,950 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:51:31,950 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [489296713] [2023-11-12 00:51:31,950 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [489296713] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:51:31,951 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:51:31,951 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-12 00:51:31,951 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1316781770] [2023-11-12 00:51:31,951 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:51:31,952 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-12 00:51:31,952 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:51:31,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-12 00:51:31,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-12 00:51:31,953 INFO L87 Difference]: Start difference. First operand 12653 states and 20967 transitions. Second operand has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 4 states have call successors, (19), 3 states have call predecessors, (19), 2 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) [2023-11-12 00:51:35,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:51:35,461 INFO L93 Difference]: Finished difference Result 37693 states and 67262 transitions. [2023-11-12 00:51:35,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-12 00:51:35,462 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 4 states have call successors, (19), 3 states have call predecessors, (19), 2 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) Word has length 107 [2023-11-12 00:51:35,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:51:35,633 INFO L225 Difference]: With dead ends: 37693 [2023-11-12 00:51:35,633 INFO L226 Difference]: Without dead ends: 25077 [2023-11-12 00:51:35,703 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-12 00:51:35,704 INFO L413 NwaCegarLoop]: 351 mSDtfsCounter, 1191 mSDsluCounter, 389 mSDsCounter, 0 mSdLazyCounter, 926 mSolverCounterSat, 394 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1266 SdHoareTripleChecker+Valid, 740 SdHoareTripleChecker+Invalid, 1320 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 394 IncrementalHoareTripleChecker+Valid, 926 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2023-11-12 00:51:35,705 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1266 Valid, 740 Invalid, 1320 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [394 Valid, 926 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2023-11-12 00:51:35,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25077 states. [2023-11-12 00:51:38,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25077 to 23842. [2023-11-12 00:51:38,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23842 states, 16686 states have (on average 1.541112309720724) internal successors, (25715), 17722 states have internal predecessors, (25715), 5382 states have call successors, (5382), 1285 states have call predecessors, (5382), 1773 states have return successors, (10128), 5089 states have call predecessors, (10128), 5377 states have call successors, (10128) [2023-11-12 00:51:38,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23842 states to 23842 states and 41225 transitions. [2023-11-12 00:51:38,834 INFO L78 Accepts]: Start accepts. Automaton has 23842 states and 41225 transitions. Word has length 107 [2023-11-12 00:51:38,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:51:38,835 INFO L495 AbstractCegarLoop]: Abstraction has 23842 states and 41225 transitions. [2023-11-12 00:51:38,835 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 4 states have call successors, (19), 3 states have call predecessors, (19), 2 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) [2023-11-12 00:51:38,836 INFO L276 IsEmpty]: Start isEmpty. Operand 23842 states and 41225 transitions. [2023-11-12 00:51:38,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2023-11-12 00:51:38,840 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:51:38,841 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 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] [2023-11-12 00:51:38,841 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-11-12 00:51:38,841 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:51:38,841 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:51:38,842 INFO L85 PathProgramCache]: Analyzing trace with hash -406049452, now seen corresponding path program 1 times [2023-11-12 00:51:38,842 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:51:38,842 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2140459316] [2023-11-12 00:51:38,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:51:38,842 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:51:38,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:51:39,105 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-11-12 00:51:39,105 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:51:39,105 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2140459316] [2023-11-12 00:51:39,106 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2140459316] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:51:39,106 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:51:39,106 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-12 00:51:39,106 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1446942717] [2023-11-12 00:51:39,106 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:51:39,107 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-12 00:51:39,107 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:51:39,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-12 00:51:39,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-12 00:51:39,108 INFO L87 Difference]: Start difference. First operand 23842 states and 41225 transitions. Second operand has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 4 states have call successors, (19), 3 states have call predecessors, (19), 2 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18)