./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 9bd2c7ff Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6cd7ec-a700-4baf-bcc1-5d5089ee6441/bin/utaipan-verify-t7M7D8N6sZ/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6cd7ec-a700-4baf-bcc1-5d5089ee6441/bin/utaipan-verify-t7M7D8N6sZ/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6cd7ec-a700-4baf-bcc1-5d5089ee6441/bin/utaipan-verify-t7M7D8N6sZ/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6cd7ec-a700-4baf-bcc1-5d5089ee6441/bin/utaipan-verify-t7M7D8N6sZ/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_4a6cd7ec-a700-4baf-bcc1-5d5089ee6441/bin/utaipan-verify-t7M7D8N6sZ/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6cd7ec-a700-4baf-bcc1-5d5089ee6441/bin/utaipan-verify-t7M7D8N6sZ --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash e942074e046d4b6eec963a95d600daf33500a37aba1da700aae37a309fea4cda --- Real Ultimate output --- This is Ultimate 0.2.3-dev-9bd2c7f [2023-11-19 04:59:27,598 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-19 04:59:27,697 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6cd7ec-a700-4baf-bcc1-5d5089ee6441/bin/utaipan-verify-t7M7D8N6sZ/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-11-19 04:59:27,703 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-19 04:59:27,704 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-19 04:59:27,751 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-19 04:59:27,752 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-19 04:59:27,753 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-19 04:59:27,754 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-19 04:59:27,754 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-19 04:59:27,760 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-19 04:59:27,761 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-19 04:59:27,762 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-19 04:59:27,767 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-19 04:59:27,767 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-19 04:59:27,768 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-19 04:59:27,769 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-19 04:59:27,770 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-19 04:59:27,770 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-19 04:59:27,771 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-19 04:59:27,771 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-19 04:59:27,772 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-19 04:59:27,773 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-19 04:59:27,773 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-19 04:59:27,774 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-19 04:59:27,774 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-19 04:59:27,774 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-19 04:59:27,775 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-19 04:59:27,775 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-19 04:59:27,775 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-19 04:59:27,777 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-19 04:59:27,777 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-19 04:59:27,777 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-19 04:59:27,777 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-19 04:59:27,778 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-19 04:59:27,778 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-19 04:59:27,778 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 04:59:27,778 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-19 04:59:27,778 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-19 04:59:27,779 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-19 04:59:27,779 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-19 04:59:27,779 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-19 04:59:27,779 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-19 04:59:27,779 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-19 04:59:27,780 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-19 04:59:27,780 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_4a6cd7ec-a700-4baf-bcc1-5d5089ee6441/bin/utaipan-verify-t7M7D8N6sZ/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6cd7ec-a700-4baf-bcc1-5d5089ee6441/bin/utaipan-verify-t7M7D8N6sZ Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e942074e046d4b6eec963a95d600daf33500a37aba1da700aae37a309fea4cda [2023-11-19 04:59:28,077 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-19 04:59:28,100 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-19 04:59:28,102 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-19 04:59:28,104 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-19 04:59:28,104 INFO L274 PluginConnector]: CDTParser initialized [2023-11-19 04:59:28,106 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6cd7ec-a700-4baf-bcc1-5d5089ee6441/bin/utaipan-verify-t7M7D8N6sZ/../../sv-benchmarks/c/product-lines/elevator_spec2_product24.cil.c [2023-11-19 04:59:31,167 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-19 04:59:31,496 INFO L384 CDTParser]: Found 1 translation units. [2023-11-19 04:59:31,496 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6cd7ec-a700-4baf-bcc1-5d5089ee6441/sv-benchmarks/c/product-lines/elevator_spec2_product24.cil.c [2023-11-19 04:59:31,524 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6cd7ec-a700-4baf-bcc1-5d5089ee6441/bin/utaipan-verify-t7M7D8N6sZ/data/18110b975/c14b537bb4774d56a8baa92d29d9516f/FLAG484d6b38b [2023-11-19 04:59:31,539 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6cd7ec-a700-4baf-bcc1-5d5089ee6441/bin/utaipan-verify-t7M7D8N6sZ/data/18110b975/c14b537bb4774d56a8baa92d29d9516f [2023-11-19 04:59:31,542 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-19 04:59:31,543 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-19 04:59:31,545 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-19 04:59:31,545 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-19 04:59:31,552 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-19 04:59:31,553 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 04:59:31" (1/1) ... [2023-11-19 04:59:31,554 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@406800c5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:59:31, skipping insertion in model container [2023-11-19 04:59:31,554 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 04:59:31" (1/1) ... [2023-11-19 04:59:31,650 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-19 04:59:32,280 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_4a6cd7ec-a700-4baf-bcc1-5d5089ee6441/sv-benchmarks/c/product-lines/elevator_spec2_product24.cil.c[63703,63716] [2023-11-19 04:59:32,379 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 04:59:32,400 INFO L202 MainTranslator]: Completed pre-run [2023-11-19 04:59:32,413 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Floor.i","") [48] [2023-11-19 04:59:32,415 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Elevator.i","") [716] [2023-11-19 04:59:32,415 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Specification2_spec.i","") [2374] [2023-11-19 04:59:32,416 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Test.i","") [2556] [2023-11-19 04:59:32,417 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Person.i","") [2912] [2023-11-19 04:59:32,418 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"scenario.i","") [3030] [2023-11-19 04:59:32,418 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"featureselect.i","") [3042] [2023-11-19 04:59:32,418 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"wsllib_check.i","") [3077] [2023-11-19 04:59:32,419 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"UnitTests.i","") [3086] [2023-11-19 04:59:32,419 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"libacc.i","") [3177] [2023-11-19 04:59:32,548 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_4a6cd7ec-a700-4baf-bcc1-5d5089ee6441/sv-benchmarks/c/product-lines/elevator_spec2_product24.cil.c[63703,63716] [2023-11-19 04:59:32,574 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 04:59:32,614 INFO L206 MainTranslator]: Completed translation [2023-11-19 04:59:32,615 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:59:32 WrapperNode [2023-11-19 04:59:32,615 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-19 04:59:32,616 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-19 04:59:32,616 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-19 04:59:32,616 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-19 04:59:32,624 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:59:32" (1/1) ... [2023-11-19 04:59:32,670 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:59:32" (1/1) ... [2023-11-19 04:59:32,736 INFO L138 Inliner]: procedures = 98, calls = 353, calls flagged for inlining = 27, calls inlined = 23, statements flattened = 936 [2023-11-19 04:59:32,736 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-19 04:59:32,737 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-19 04:59:32,737 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-19 04:59:32,737 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-19 04:59:32,747 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:59:32" (1/1) ... [2023-11-19 04:59:32,748 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:59:32" (1/1) ... [2023-11-19 04:59:32,754 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:59:32" (1/1) ... [2023-11-19 04:59:32,755 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:59:32" (1/1) ... [2023-11-19 04:59:32,781 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:59:32" (1/1) ... [2023-11-19 04:59:32,797 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:59:32" (1/1) ... [2023-11-19 04:59:32,812 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:59:32" (1/1) ... [2023-11-19 04:59:32,834 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:59:32" (1/1) ... [2023-11-19 04:59:32,845 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-19 04:59:32,851 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-19 04:59:32,852 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-19 04:59:32,852 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-19 04:59:32,853 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:59:32" (1/1) ... [2023-11-19 04:59:32,859 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 04:59:32,873 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6cd7ec-a700-4baf-bcc1-5d5089ee6441/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 04:59:32,897 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6cd7ec-a700-4baf-bcc1-5d5089ee6441/bin/utaipan-verify-t7M7D8N6sZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-19 04:59:32,933 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6cd7ec-a700-4baf-bcc1-5d5089ee6441/bin/utaipan-verify-t7M7D8N6sZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-19 04:59:32,949 INFO L130 BoogieDeclarations]: Found specification of procedure bigMacCall [2023-11-19 04:59:32,950 INFO L138 BoogieDeclarations]: Found implementation of procedure bigMacCall [2023-11-19 04:59:32,950 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2023-11-19 04:59:32,950 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2023-11-19 04:59:32,950 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2023-11-19 04:59:32,950 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2023-11-19 04:59:32,951 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2023-11-19 04:59:32,951 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2023-11-19 04:59:32,951 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2023-11-19 04:59:32,952 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2023-11-19 04:59:32,952 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2023-11-19 04:59:32,952 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2023-11-19 04:59:32,952 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2023-11-19 04:59:32,953 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2023-11-19 04:59:32,954 INFO L130 BoogieDeclarations]: Found specification of procedure buttonForFloorIsPressed [2023-11-19 04:59:32,954 INFO L138 BoogieDeclarations]: Found implementation of procedure buttonForFloorIsPressed [2023-11-19 04:59:32,955 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2023-11-19 04:59:32,955 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2023-11-19 04:59:32,957 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2023-11-19 04:59:32,958 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2023-11-19 04:59:32,958 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-19 04:59:32,958 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor__wrappee__twothirdsfull [2023-11-19 04:59:32,958 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor__wrappee__twothirdsfull [2023-11-19 04:59:32,958 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2023-11-19 04:59:32,958 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2023-11-19 04:59:32,959 INFO L130 BoogieDeclarations]: Found specification of procedure isExecutiveFloorCalling [2023-11-19 04:59:32,960 INFO L138 BoogieDeclarations]: Found implementation of procedure isExecutiveFloorCalling [2023-11-19 04:59:32,960 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2023-11-19 04:59:32,960 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2023-11-19 04:59:32,960 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2023-11-19 04:59:32,960 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2023-11-19 04:59:32,960 INFO L130 BoogieDeclarations]: Found specification of procedure areDoorsOpen [2023-11-19 04:59:32,960 INFO L138 BoogieDeclarations]: Found implementation of procedure areDoorsOpen [2023-11-19 04:59:32,961 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2023-11-19 04:59:32,961 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2023-11-19 04:59:32,961 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2023-11-19 04:59:32,961 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2023-11-19 04:59:32,962 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2023-11-19 04:59:32,962 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2023-11-19 04:59:32,962 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2023-11-19 04:59:32,962 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2023-11-19 04:59:32,963 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2023-11-19 04:59:32,963 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2023-11-19 04:59:32,963 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2023-11-19 04:59:32,963 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2023-11-19 04:59:32,963 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2023-11-19 04:59:32,963 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2023-11-19 04:59:32,964 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-19 04:59:32,964 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2023-11-19 04:59:32,964 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2023-11-19 04:59:32,965 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection__wrappee__weight [2023-11-19 04:59:32,965 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection__wrappee__weight [2023-11-19 04:59:32,966 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-19 04:59:32,966 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-19 04:59:32,967 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2023-11-19 04:59:32,967 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2023-11-19 04:59:32,967 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift__wrappee__executivefloor [2023-11-19 04:59:32,967 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift__wrappee__executivefloor [2023-11-19 04:59:33,149 INFO L236 CfgBuilder]: Building ICFG [2023-11-19 04:59:33,152 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-19 04:59:34,660 INFO L277 CfgBuilder]: Performing block encoding [2023-11-19 04:59:35,668 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-19 04:59:35,668 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-19 04:59:35,684 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 04:59:35 BoogieIcfgContainer [2023-11-19 04:59:35,685 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-19 04:59:35,689 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-19 04:59:35,689 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-19 04:59:35,693 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-19 04:59:35,693 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 04:59:31" (1/3) ... [2023-11-19 04:59:35,694 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@e6f0367 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 04:59:35, skipping insertion in model container [2023-11-19 04:59:35,694 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:59:32" (2/3) ... [2023-11-19 04:59:35,696 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@e6f0367 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 04:59:35, skipping insertion in model container [2023-11-19 04:59:35,697 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 04:59:35" (3/3) ... [2023-11-19 04:59:35,700 INFO L112 eAbstractionObserver]: Analyzing ICFG elevator_spec2_product24.cil.c [2023-11-19 04:59:35,722 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-19 04:59:35,723 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-19 04:59:35,814 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 04:59:35,820 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;@fabaf3, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-19 04:59:35,821 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-19 04:59:35,828 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) [2023-11-19 04:59:35,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-11-19 04:59:35,842 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:59:35,842 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] [2023-11-19 04:59:35,843 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:59:35,849 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:59:35,849 INFO L85 PathProgramCache]: Analyzing trace with hash -21517909, now seen corresponding path program 1 times [2023-11-19 04:59:35,860 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:59:35,860 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [311665263] [2023-11-19 04:59:35,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:59:35,861 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:59:36,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:59:36,320 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 04:59:36,320 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:59:36,321 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [311665263] [2023-11-19 04:59:36,321 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [311665263] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:59:36,322 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 04:59:36,322 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 04:59:36,324 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1740121155] [2023-11-19 04:59:36,324 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:59:36,329 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-19 04:59:36,329 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:59:36,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-19 04:59:36,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-19 04:59:36,368 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) [2023-11-19 04:59:36,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:59:36,644 INFO L93 Difference]: Finished difference Result 424 states and 665 transitions. [2023-11-19 04:59:36,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-19 04:59:36,648 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 [2023-11-19 04:59:36,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:59:36,679 INFO L225 Difference]: With dead ends: 424 [2023-11-19 04:59:36,680 INFO L226 Difference]: Without dead ends: 402 [2023-11-19 04:59:36,685 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-19 04:59:36,692 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 [2023-11-19 04:59:36,693 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] [2023-11-19 04:59:36,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 402 states. [2023-11-19 04:59:36,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 402 to 402. [2023-11-19 04:59:36,800 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) [2023-11-19 04:59:36,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 402 states to 402 states and 627 transitions. [2023-11-19 04:59:36,813 INFO L78 Accepts]: Start accepts. Automaton has 402 states and 627 transitions. Word has length 43 [2023-11-19 04:59:36,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:59:36,815 INFO L495 AbstractCegarLoop]: Abstraction has 402 states and 627 transitions. [2023-11-19 04:59:36,816 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) [2023-11-19 04:59:36,816 INFO L276 IsEmpty]: Start isEmpty. Operand 402 states and 627 transitions. [2023-11-19 04:59:36,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2023-11-19 04:59:36,820 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:59:36,820 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] [2023-11-19 04:59:36,821 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-19 04:59:36,821 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:59:36,822 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:59:36,822 INFO L85 PathProgramCache]: Analyzing trace with hash 1006208728, now seen corresponding path program 1 times [2023-11-19 04:59:36,822 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:59:36,823 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [757910447] [2023-11-19 04:59:36,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:59:36,823 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:59:36,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:59:37,424 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 04:59:37,425 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:59:37,428 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [757910447] [2023-11-19 04:59:37,429 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [757910447] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:59:37,429 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 04:59:37,429 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-19 04:59:37,430 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1397509685] [2023-11-19 04:59:37,431 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:59:37,433 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-19 04:59:37,434 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:59:37,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-19 04:59:37,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-19 04:59:37,442 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) [2023-11-19 04:59:40,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:59:40,157 INFO L93 Difference]: Finished difference Result 1312 states and 2089 transitions. [2023-11-19 04:59:40,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-19 04:59:40,158 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 [2023-11-19 04:59:40,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:59:40,168 INFO L225 Difference]: With dead ends: 1312 [2023-11-19 04:59:40,168 INFO L226 Difference]: Without dead ends: 926 [2023-11-19 04:59:40,173 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2023-11-19 04:59:40,175 INFO L413 NwaCegarLoop]: 294 mSDtfsCounter, 1288 mSDsluCounter, 713 mSDsCounter, 0 mSdLazyCounter, 1499 mSolverCounterSat, 471 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1362 SdHoareTripleChecker+Valid, 1007 SdHoareTripleChecker+Invalid, 1970 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 471 IncrementalHoareTripleChecker+Valid, 1499 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2023-11-19 04:59:40,176 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1362 Valid, 1007 Invalid, 1970 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [471 Valid, 1499 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2023-11-19 04:59:40,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 926 states. [2023-11-19 04:59:40,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 926 to 839. [2023-11-19 04:59:40,264 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) [2023-11-19 04:59:40,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 839 states to 839 states and 1339 transitions. [2023-11-19 04:59:40,275 INFO L78 Accepts]: Start accepts. Automaton has 839 states and 1339 transitions. Word has length 44 [2023-11-19 04:59:40,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:59:40,275 INFO L495 AbstractCegarLoop]: Abstraction has 839 states and 1339 transitions. [2023-11-19 04:59:40,276 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) [2023-11-19 04:59:40,276 INFO L276 IsEmpty]: Start isEmpty. Operand 839 states and 1339 transitions. [2023-11-19 04:59:40,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2023-11-19 04:59:40,285 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:59:40,286 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] [2023-11-19 04:59:40,286 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-19 04:59:40,286 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:59:40,287 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:59:40,287 INFO L85 PathProgramCache]: Analyzing trace with hash -1895530835, now seen corresponding path program 1 times [2023-11-19 04:59:40,287 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:59:40,287 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2040695949] [2023-11-19 04:59:40,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:59:40,288 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:59:40,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:59:40,988 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-19 04:59:40,988 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:59:40,989 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2040695949] [2023-11-19 04:59:40,989 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2040695949] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:59:40,991 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 04:59:40,991 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-11-19 04:59:40,991 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [507282185] [2023-11-19 04:59:40,991 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:59:40,992 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-19 04:59:40,992 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:59:40,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-19 04:59:40,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2023-11-19 04:59:40,994 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) [2023-11-19 04:59:44,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:59:44,763 INFO L93 Difference]: Finished difference Result 2489 states and 3984 transitions. [2023-11-19 04:59:44,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-11-19 04:59:44,764 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 [2023-11-19 04:59:44,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:59:44,777 INFO L225 Difference]: With dead ends: 2489 [2023-11-19 04:59:44,777 INFO L226 Difference]: Without dead ends: 1666 [2023-11-19 04:59:44,783 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 [2023-11-19 04:59:44,785 INFO L413 NwaCegarLoop]: 592 mSDtfsCounter, 1059 mSDsluCounter, 2232 mSDsCounter, 0 mSdLazyCounter, 5321 mSolverCounterSat, 323 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s 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, 3.3s IncrementalHoareTripleChecker+Time [2023-11-19 04:59:44,785 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1133 Valid, 2824 Invalid, 5644 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [323 Valid, 5321 Invalid, 0 Unknown, 0 Unchecked, 3.3s Time] [2023-11-19 04:59:44,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1666 states. [2023-11-19 04:59:44,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1666 to 1648. [2023-11-19 04:59:44,949 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) [2023-11-19 04:59:44,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1648 states to 1648 states and 2633 transitions. [2023-11-19 04:59:44,967 INFO L78 Accepts]: Start accepts. Automaton has 1648 states and 2633 transitions. Word has length 87 [2023-11-19 04:59:44,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:59:44,968 INFO L495 AbstractCegarLoop]: Abstraction has 1648 states and 2633 transitions. [2023-11-19 04:59:44,968 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) [2023-11-19 04:59:44,968 INFO L276 IsEmpty]: Start isEmpty. Operand 1648 states and 2633 transitions. [2023-11-19 04:59:44,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2023-11-19 04:59:44,972 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:59:44,973 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] [2023-11-19 04:59:44,973 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-19 04:59:44,973 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:59:44,973 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:59:44,974 INFO L85 PathProgramCache]: Analyzing trace with hash 769734355, now seen corresponding path program 1 times [2023-11-19 04:59:44,974 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:59:44,974 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1559099093] [2023-11-19 04:59:44,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:59:44,974 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:59:45,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:59:45,389 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-19 04:59:45,389 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:59:45,389 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1559099093] [2023-11-19 04:59:45,390 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1559099093] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:59:45,390 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 04:59:45,390 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-19 04:59:45,390 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1224283289] [2023-11-19 04:59:45,390 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:59:45,392 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-19 04:59:45,392 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:59:45,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-19 04:59:45,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-19 04:59:45,393 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) [2023-11-19 04:59:47,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:59:47,935 INFO L93 Difference]: Finished difference Result 4267 states and 6829 transitions. [2023-11-19 04:59:47,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-19 04:59:47,935 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 [2023-11-19 04:59:47,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:59:47,964 INFO L225 Difference]: With dead ends: 4267 [2023-11-19 04:59:47,964 INFO L226 Difference]: Without dead ends: 2637 [2023-11-19 04:59:47,976 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 [2023-11-19 04:59:47,985 INFO L413 NwaCegarLoop]: 385 mSDtfsCounter, 1221 mSDsluCounter, 1268 mSDsCounter, 0 mSdLazyCounter, 2366 mSolverCounterSat, 459 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s 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, 2.2s IncrementalHoareTripleChecker+Time [2023-11-19 04:59:47,987 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1304 Valid, 1653 Invalid, 2825 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [459 Valid, 2366 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2023-11-19 04:59:47,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2637 states. [2023-11-19 04:59:48,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2637 to 2546. [2023-11-19 04:59:48,265 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) [2023-11-19 04:59:48,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2546 states to 2546 states and 4064 transitions. [2023-11-19 04:59:48,289 INFO L78 Accepts]: Start accepts. Automaton has 2546 states and 4064 transitions. Word has length 88 [2023-11-19 04:59:48,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:59:48,289 INFO L495 AbstractCegarLoop]: Abstraction has 2546 states and 4064 transitions. [2023-11-19 04:59:48,290 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) [2023-11-19 04:59:48,290 INFO L276 IsEmpty]: Start isEmpty. Operand 2546 states and 4064 transitions. [2023-11-19 04:59:48,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2023-11-19 04:59:48,294 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:59:48,294 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] [2023-11-19 04:59:48,294 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-19 04:59:48,294 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:59:48,295 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:59:48,295 INFO L85 PathProgramCache]: Analyzing trace with hash 1797810284, now seen corresponding path program 1 times [2023-11-19 04:59:48,295 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:59:48,295 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [99194514] [2023-11-19 04:59:48,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:59:48,296 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:59:48,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:59:48,662 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-19 04:59:48,664 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:59:48,664 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [99194514] [2023-11-19 04:59:48,664 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [99194514] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:59:48,664 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 04:59:48,665 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-19 04:59:48,666 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1497470028] [2023-11-19 04:59:48,666 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:59:48,666 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-19 04:59:48,667 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:59:48,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-19 04:59:48,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-19 04:59:48,668 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) [2023-11-19 04:59:49,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:59:49,304 INFO L93 Difference]: Finished difference Result 2647 states and 4232 transitions. [2023-11-19 04:59:49,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-19 04:59:49,305 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 [2023-11-19 04:59:49,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:59:49,332 INFO L225 Difference]: With dead ends: 2647 [2023-11-19 04:59:49,332 INFO L226 Difference]: Without dead ends: 2632 [2023-11-19 04:59:49,335 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2023-11-19 04:59:49,340 INFO L413 NwaCegarLoop]: 582 mSDtfsCounter, 720 mSDsluCounter, 970 mSDsCounter, 0 mSdLazyCounter, 329 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s 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 [2023-11-19 04:59:49,340 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] [2023-11-19 04:59:49,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2632 states. [2023-11-19 04:59:49,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2632 to 2552. [2023-11-19 04:59:49,547 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) [2023-11-19 04:59:49,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2552 states to 2552 states and 4070 transitions. [2023-11-19 04:59:49,585 INFO L78 Accepts]: Start accepts. Automaton has 2552 states and 4070 transitions. Word has length 92 [2023-11-19 04:59:49,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:59:49,588 INFO L495 AbstractCegarLoop]: Abstraction has 2552 states and 4070 transitions. [2023-11-19 04:59:49,589 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) [2023-11-19 04:59:49,589 INFO L276 IsEmpty]: Start isEmpty. Operand 2552 states and 4070 transitions. [2023-11-19 04:59:49,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2023-11-19 04:59:49,601 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:59:49,601 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] [2023-11-19 04:59:49,601 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-19 04:59:49,602 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:59:49,602 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:59:49,602 INFO L85 PathProgramCache]: Analyzing trace with hash 2003675615, now seen corresponding path program 1 times [2023-11-19 04:59:49,602 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:59:49,603 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1704127125] [2023-11-19 04:59:49,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:59:49,604 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:59:49,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:59:49,982 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-19 04:59:49,982 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:59:49,982 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1704127125] [2023-11-19 04:59:49,982 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1704127125] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:59:49,982 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 04:59:49,982 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-19 04:59:49,983 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1939056740] [2023-11-19 04:59:49,983 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:59:49,983 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-19 04:59:49,983 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:59:49,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-19 04:59:49,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-19 04:59:49,985 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) [2023-11-19 04:59:50,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:59:50,797 INFO L93 Difference]: Finished difference Result 2697 states and 4275 transitions. [2023-11-19 04:59:50,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-19 04:59:50,798 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 [2023-11-19 04:59:50,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:59:50,823 INFO L225 Difference]: With dead ends: 2697 [2023-11-19 04:59:50,823 INFO L226 Difference]: Without dead ends: 2682 [2023-11-19 04:59:50,826 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 [2023-11-19 04:59:50,827 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 [2023-11-19 04:59:50,828 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] [2023-11-19 04:59:50,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2682 states. [2023-11-19 04:59:51,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2682 to 2628. [2023-11-19 04:59:51,084 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) [2023-11-19 04:59:51,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2628 states to 2628 states and 4180 transitions. [2023-11-19 04:59:51,102 INFO L78 Accepts]: Start accepts. Automaton has 2628 states and 4180 transitions. Word has length 97 [2023-11-19 04:59:51,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:59:51,103 INFO L495 AbstractCegarLoop]: Abstraction has 2628 states and 4180 transitions. [2023-11-19 04:59:51,103 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) [2023-11-19 04:59:51,103 INFO L276 IsEmpty]: Start isEmpty. Operand 2628 states and 4180 transitions. [2023-11-19 04:59:51,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2023-11-19 04:59:51,108 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:59:51,108 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] [2023-11-19 04:59:51,108 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-19 04:59:51,109 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:59:51,109 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:59:51,109 INFO L85 PathProgramCache]: Analyzing trace with hash 3618192, now seen corresponding path program 1 times [2023-11-19 04:59:51,110 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:59:51,110 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1004434757] [2023-11-19 04:59:51,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:59:51,110 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:59:51,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:59:51,416 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-11-19 04:59:51,417 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:59:51,417 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1004434757] [2023-11-19 04:59:51,417 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1004434757] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:59:51,417 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 04:59:51,418 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-19 04:59:51,418 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2041291068] [2023-11-19 04:59:51,418 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:59:51,418 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 04:59:51,419 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:59:51,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 04:59:51,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-19 04:59:51,420 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) [2023-11-19 04:59:53,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:59:53,542 INFO L93 Difference]: Finished difference Result 7108 states and 11509 transitions. [2023-11-19 04:59:53,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-19 04:59:53,543 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 [2023-11-19 04:59:53,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:59:53,580 INFO L225 Difference]: With dead ends: 7108 [2023-11-19 04:59:53,580 INFO L226 Difference]: Without dead ends: 4496 [2023-11-19 04:59:53,598 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 [2023-11-19 04:59:53,599 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, 1.6s IncrementalHoareTripleChecker+Time [2023-11-19 04:59:53,599 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1308 Valid, 704 Invalid, 1324 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [400 Valid, 924 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2023-11-19 04:59:53,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4496 states. [2023-11-19 04:59:53,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4496 to 4133. [2023-11-19 04:59:53,983 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) [2023-11-19 04:59:54,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4133 states to 4133 states and 6609 transitions. [2023-11-19 04:59:54,011 INFO L78 Accepts]: Start accepts. Automaton has 4133 states and 6609 transitions. Word has length 104 [2023-11-19 04:59:54,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:59:54,014 INFO L495 AbstractCegarLoop]: Abstraction has 4133 states and 6609 transitions. [2023-11-19 04:59:54,014 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) [2023-11-19 04:59:54,014 INFO L276 IsEmpty]: Start isEmpty. Operand 4133 states and 6609 transitions. [2023-11-19 04:59:54,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2023-11-19 04:59:54,020 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:59:54,020 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] [2023-11-19 04:59:54,021 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-19 04:59:54,021 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:59:54,022 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:59:54,022 INFO L85 PathProgramCache]: Analyzing trace with hash 111871861, now seen corresponding path program 1 times [2023-11-19 04:59:54,022 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:59:54,023 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [900062104] [2023-11-19 04:59:54,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:59:54,023 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:59:54,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:59:54,401 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-11-19 04:59:54,402 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:59:54,402 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [900062104] [2023-11-19 04:59:54,402 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [900062104] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:59:54,402 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 04:59:54,402 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-19 04:59:54,403 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [299896969] [2023-11-19 04:59:54,403 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:59:54,403 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 04:59:54,404 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:59:54,404 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 04:59:54,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-19 04:59:54,405 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) [2023-11-19 04:59:56,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:59:56,616 INFO L93 Difference]: Finished difference Result 11577 states and 19028 transitions. [2023-11-19 04:59:56,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-19 04:59:56,617 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 [2023-11-19 04:59:56,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:59:56,740 INFO L225 Difference]: With dead ends: 11577 [2023-11-19 04:59:56,740 INFO L226 Difference]: Without dead ends: 7463 [2023-11-19 04:59:56,775 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 [2023-11-19 04:59:56,776 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, 1.5s IncrementalHoareTripleChecker+Time [2023-11-19 04:59:56,777 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1294 Valid, 717 Invalid, 1323 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [398 Valid, 925 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2023-11-19 04:59:56,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7463 states. [2023-11-19 04:59:57,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7463 to 6992. [2023-11-19 04:59:57,572 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) [2023-11-19 04:59:57,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6992 states to 6992 states and 11317 transitions. [2023-11-19 04:59:57,625 INFO L78 Accepts]: Start accepts. Automaton has 6992 states and 11317 transitions. Word has length 105 [2023-11-19 04:59:57,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:59:57,625 INFO L495 AbstractCegarLoop]: Abstraction has 6992 states and 11317 transitions. [2023-11-19 04:59:57,626 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) [2023-11-19 04:59:57,627 INFO L276 IsEmpty]: Start isEmpty. Operand 6992 states and 11317 transitions. [2023-11-19 04:59:57,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2023-11-19 04:59:57,633 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:59:57,634 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] [2023-11-19 04:59:57,634 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-19 04:59:57,634 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:59:57,634 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:59:57,635 INFO L85 PathProgramCache]: Analyzing trace with hash -827227790, now seen corresponding path program 1 times [2023-11-19 04:59:57,635 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:59:57,635 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [221400274] [2023-11-19 04:59:57,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:59:57,636 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:59:57,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:59:57,920 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-11-19 04:59:57,920 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:59:57,920 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [221400274] [2023-11-19 04:59:57,920 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [221400274] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:59:57,921 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 04:59:57,921 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-19 04:59:57,921 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [178661847] [2023-11-19 04:59:57,921 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:59:57,922 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 04:59:57,922 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:59:57,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 04:59:57,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-19 04:59:57,924 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) [2023-11-19 05:00:00,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:00:00,688 INFO L93 Difference]: Finished difference Result 20336 states and 34435 transitions. [2023-11-19 05:00:00,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-19 05:00:00,689 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 [2023-11-19 05:00:00,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:00:00,800 INFO L225 Difference]: With dead ends: 20336 [2023-11-19 05:00:00,801 INFO L226 Difference]: Without dead ends: 13369 [2023-11-19 05:00:00,861 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 [2023-11-19 05:00:00,865 INFO L413 NwaCegarLoop]: 338 mSDtfsCounter, 1204 mSDsluCounter, 392 mSDsCounter, 0 mSdLazyCounter, 924 mSolverCounterSat, 396 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s 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, 1.5s IncrementalHoareTripleChecker+Time [2023-11-19 05:00:00,865 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1280 Valid, 730 Invalid, 1320 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [396 Valid, 924 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2023-11-19 05:00:00,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13369 states. [2023-11-19 05:00:02,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13369 to 12653. [2023-11-19 05:00:02,260 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) [2023-11-19 05:00:02,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12653 states to 12653 states and 20967 transitions. [2023-11-19 05:00:02,340 INFO L78 Accepts]: Start accepts. Automaton has 12653 states and 20967 transitions. Word has length 106 [2023-11-19 05:00:02,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:00:02,341 INFO L495 AbstractCegarLoop]: Abstraction has 12653 states and 20967 transitions. [2023-11-19 05:00:02,341 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) [2023-11-19 05:00:02,341 INFO L276 IsEmpty]: Start isEmpty. Operand 12653 states and 20967 transitions. [2023-11-19 05:00:02,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2023-11-19 05:00:02,346 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:00:02,346 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] [2023-11-19 05:00:02,347 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-19 05:00:02,347 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:00:02,347 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:00:02,348 INFO L85 PathProgramCache]: Analyzing trace with hash 125458007, now seen corresponding path program 1 times [2023-11-19 05:00:02,348 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:00:02,348 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [327083493] [2023-11-19 05:00:02,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:00:02,349 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:00:02,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:00:02,708 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-11-19 05:00:02,709 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:00:02,709 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [327083493] [2023-11-19 05:00:02,709 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [327083493] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:00:02,709 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 05:00:02,709 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-19 05:00:02,710 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [790518314] [2023-11-19 05:00:02,710 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:00:02,710 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 05:00:02,710 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:00:02,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 05:00:02,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-19 05:00:02,712 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) [2023-11-19 05:00:06,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:00:06,426 INFO L93 Difference]: Finished difference Result 37693 states and 67262 transitions. [2023-11-19 05:00:06,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-19 05:00:06,426 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 [2023-11-19 05:00:06,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:00:06,569 INFO L225 Difference]: With dead ends: 37693 [2023-11-19 05:00:06,570 INFO L226 Difference]: Without dead ends: 25077 [2023-11-19 05:00:06,629 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 [2023-11-19 05:00:06,630 INFO L413 NwaCegarLoop]: 351 mSDtfsCounter, 1191 mSDsluCounter, 389 mSDsCounter, 0 mSdLazyCounter, 926 mSolverCounterSat, 394 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s 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, 1.6s IncrementalHoareTripleChecker+Time [2023-11-19 05:00:06,631 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1266 Valid, 740 Invalid, 1320 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [394 Valid, 926 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2023-11-19 05:00:06,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25077 states. [2023-11-19 05:00:08,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25077 to 23842. [2023-11-19 05:00:08,858 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) [2023-11-19 05:00:09,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23842 states to 23842 states and 41225 transitions. [2023-11-19 05:00:09,017 INFO L78 Accepts]: Start accepts. Automaton has 23842 states and 41225 transitions. Word has length 107 [2023-11-19 05:00:09,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:00:09,018 INFO L495 AbstractCegarLoop]: Abstraction has 23842 states and 41225 transitions. [2023-11-19 05:00:09,018 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) [2023-11-19 05:00:09,019 INFO L276 IsEmpty]: Start isEmpty. Operand 23842 states and 41225 transitions. [2023-11-19 05:00:09,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2023-11-19 05:00:09,024 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:00:09,024 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] [2023-11-19 05:00:09,024 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-11-19 05:00:09,025 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:00:09,025 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:00:09,025 INFO L85 PathProgramCache]: Analyzing trace with hash -406049452, now seen corresponding path program 1 times [2023-11-19 05:00:09,026 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:00:09,026 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1670071592] [2023-11-19 05:00:09,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:00:09,026 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:00:09,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:00:09,306 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-11-19 05:00:09,306 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:00:09,306 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1670071592] [2023-11-19 05:00:09,306 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1670071592] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:00:09,307 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 05:00:09,307 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-19 05:00:09,307 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1917620425] [2023-11-19 05:00:09,307 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:00:09,308 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 05:00:09,308 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:00:09,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 05:00:09,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-19 05:00:09,309 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)