./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/elevator_spec1_product26.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be2d219d-1f53-4702-9ced-591a2bfd8062/bin/utaipan-verify-nQ1chXbOIh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be2d219d-1f53-4702-9ced-591a2bfd8062/bin/utaipan-verify-nQ1chXbOIh/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be2d219d-1f53-4702-9ced-591a2bfd8062/bin/utaipan-verify-nQ1chXbOIh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be2d219d-1f53-4702-9ced-591a2bfd8062/bin/utaipan-verify-nQ1chXbOIh/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec1_product26.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be2d219d-1f53-4702-9ced-591a2bfd8062/bin/utaipan-verify-nQ1chXbOIh/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be2d219d-1f53-4702-9ced-591a2bfd8062/bin/utaipan-verify-nQ1chXbOIh --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 2b84cfef0f3fa5659093b8e6c2d8a82a1b18913f669c8d0a2efe9a0300cc4873 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-12-02 17:21:25,342 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-02 17:21:25,403 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be2d219d-1f53-4702-9ced-591a2bfd8062/bin/utaipan-verify-nQ1chXbOIh/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-12-02 17:21:25,409 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-02 17:21:25,410 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-12-02 17:21:25,435 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-02 17:21:25,435 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-12-02 17:21:25,436 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-12-02 17:21:25,437 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-02 17:21:25,437 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-02 17:21:25,438 INFO L153 SettingsManager]: * User list type=DISABLED [2023-12-02 17:21:25,438 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-12-02 17:21:25,439 INFO L153 SettingsManager]: * Explicit value domain=true [2023-12-02 17:21:25,439 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-12-02 17:21:25,439 INFO L153 SettingsManager]: * Octagon Domain=false [2023-12-02 17:21:25,440 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-12-02 17:21:25,440 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-12-02 17:21:25,441 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-12-02 17:21:25,441 INFO L153 SettingsManager]: * Interval Domain=false [2023-12-02 17:21:25,442 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-12-02 17:21:25,442 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-12-02 17:21:25,448 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-12-02 17:21:25,449 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-02 17:21:25,449 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-12-02 17:21:25,450 INFO L153 SettingsManager]: * sizeof long=4 [2023-12-02 17:21:25,450 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-02 17:21:25,451 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-12-02 17:21:25,451 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-02 17:21:25,451 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-12-02 17:21:25,452 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-02 17:21:25,452 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-12-02 17:21:25,452 INFO L153 SettingsManager]: * sizeof long double=12 [2023-12-02 17:21:25,453 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-12-02 17:21:25,453 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-02 17:21:25,453 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-02 17:21:25,453 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-12-02 17:21:25,453 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-02 17:21:25,454 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 17:21:25,454 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-02 17:21:25,454 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-02 17:21:25,454 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-12-02 17:21:25,455 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-12-02 17:21:25,455 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-12-02 17:21:25,455 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-02 17:21:25,455 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-12-02 17:21:25,455 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-12-02 17:21:25,455 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-12-02 17:21:25,456 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_be2d219d-1f53-4702-9ced-591a2bfd8062/bin/utaipan-verify-nQ1chXbOIh/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be2d219d-1f53-4702-9ced-591a2bfd8062/bin/utaipan-verify-nQ1chXbOIh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2b84cfef0f3fa5659093b8e6c2d8a82a1b18913f669c8d0a2efe9a0300cc4873 [2023-12-02 17:21:25,678 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-02 17:21:25,698 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-02 17:21:25,701 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-02 17:21:25,703 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-02 17:21:25,703 INFO L274 PluginConnector]: CDTParser initialized [2023-12-02 17:21:25,704 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be2d219d-1f53-4702-9ced-591a2bfd8062/bin/utaipan-verify-nQ1chXbOIh/../../sv-benchmarks/c/product-lines/elevator_spec1_product26.cil.c [2023-12-02 17:21:28,503 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-02 17:21:28,796 INFO L384 CDTParser]: Found 1 translation units. [2023-12-02 17:21:28,797 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be2d219d-1f53-4702-9ced-591a2bfd8062/sv-benchmarks/c/product-lines/elevator_spec1_product26.cil.c [2023-12-02 17:21:28,818 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be2d219d-1f53-4702-9ced-591a2bfd8062/bin/utaipan-verify-nQ1chXbOIh/data/e4eb97383/b876ecac5f2e41639b480811013a4094/FLAG86312b5f1 [2023-12-02 17:21:28,833 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be2d219d-1f53-4702-9ced-591a2bfd8062/bin/utaipan-verify-nQ1chXbOIh/data/e4eb97383/b876ecac5f2e41639b480811013a4094 [2023-12-02 17:21:28,836 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-02 17:21:28,837 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-12-02 17:21:28,839 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-02 17:21:28,839 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-02 17:21:28,844 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-02 17:21:28,845 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 05:21:28" (1/1) ... [2023-12-02 17:21:28,846 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@37f18c05 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:21:28, skipping insertion in model container [2023-12-02 17:21:28,846 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 05:21:28" (1/1) ... [2023-12-02 17:21:28,917 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-02 17:21:29,329 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_be2d219d-1f53-4702-9ced-591a2bfd8062/sv-benchmarks/c/product-lines/elevator_spec1_product26.cil.c[55974,55987] [2023-12-02 17:21:29,352 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 17:21:29,365 INFO L202 MainTranslator]: Completed pre-run [2023-12-02 17:21:29,375 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"scenario.i","") [48] [2023-12-02 17:21:29,377 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Elevator.i","") [64] [2023-12-02 17:21:29,377 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"libacc.i","") [1592] [2023-12-02 17:21:29,378 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"featureselect.i","") [1958] [2023-12-02 17:21:29,378 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"UnitTests.i","") [1996] [2023-12-02 17:21:29,378 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Person.i","") [2090] [2023-12-02 17:21:29,378 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Specification1_spec.i","") [2208] [2023-12-02 17:21:29,378 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Test.i","") [2390] [2023-12-02 17:21:29,379 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"wsllib_check.i","") [2740] [2023-12-02 17:21:29,379 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Floor.i","") [2749] [2023-12-02 17:21:29,470 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_be2d219d-1f53-4702-9ced-591a2bfd8062/sv-benchmarks/c/product-lines/elevator_spec1_product26.cil.c[55974,55987] [2023-12-02 17:21:29,479 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 17:21:29,502 INFO L206 MainTranslator]: Completed translation [2023-12-02 17:21:29,503 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:21:29 WrapperNode [2023-12-02 17:21:29,503 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-02 17:21:29,504 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-02 17:21:29,504 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-02 17:21:29,504 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-02 17:21:29,509 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:21:29" (1/1) ... [2023-12-02 17:21:29,535 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:21:29" (1/1) ... [2023-12-02 17:21:29,574 INFO L138 Inliner]: procedures = 93, calls = 341, calls flagged for inlining = 28, calls inlined = 24, statements flattened = 849 [2023-12-02 17:21:29,574 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-02 17:21:29,575 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-02 17:21:29,575 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-02 17:21:29,575 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-02 17:21:29,584 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:21:29" (1/1) ... [2023-12-02 17:21:29,585 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:21:29" (1/1) ... [2023-12-02 17:21:29,590 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:21:29" (1/1) ... [2023-12-02 17:21:29,591 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:21:29" (1/1) ... [2023-12-02 17:21:29,610 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:21:29" (1/1) ... [2023-12-02 17:21:29,623 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:21:29" (1/1) ... [2023-12-02 17:21:29,627 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:21:29" (1/1) ... [2023-12-02 17:21:29,633 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:21:29" (1/1) ... [2023-12-02 17:21:29,641 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-02 17:21:29,642 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-02 17:21:29,642 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-02 17:21:29,642 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-02 17:21:29,643 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:21:29" (1/1) ... [2023-12-02 17:21:29,649 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 17:21:29,664 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be2d219d-1f53-4702-9ced-591a2bfd8062/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 17:21:29,678 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be2d219d-1f53-4702-9ced-591a2bfd8062/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-12-02 17:21:29,698 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be2d219d-1f53-4702-9ced-591a2bfd8062/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-12-02 17:21:29,727 INFO L130 BoogieDeclarations]: Found specification of procedure angelinaCall [2023-12-02 17:21:29,727 INFO L138 BoogieDeclarations]: Found implementation of procedure angelinaCall [2023-12-02 17:21:29,728 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-02 17:21:29,728 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2023-12-02 17:21:29,728 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2023-12-02 17:21:29,728 INFO L130 BoogieDeclarations]: Found specification of procedure bigMacCall [2023-12-02 17:21:29,728 INFO L138 BoogieDeclarations]: Found implementation of procedure bigMacCall [2023-12-02 17:21:29,728 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2023-12-02 17:21:29,728 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2023-12-02 17:21:29,729 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2023-12-02 17:21:29,729 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2023-12-02 17:21:29,729 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2023-12-02 17:21:29,729 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2023-12-02 17:21:29,729 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2023-12-02 17:21:29,729 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2023-12-02 17:21:29,729 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2023-12-02 17:21:29,729 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2023-12-02 17:21:29,730 INFO L130 BoogieDeclarations]: Found specification of procedure areDoorsOpen [2023-12-02 17:21:29,730 INFO L138 BoogieDeclarations]: Found implementation of procedure areDoorsOpen [2023-12-02 17:21:29,730 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2023-12-02 17:21:29,730 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2023-12-02 17:21:29,730 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2023-12-02 17:21:29,730 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2023-12-02 17:21:29,730 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2023-12-02 17:21:29,731 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2023-12-02 17:21:29,731 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2023-12-02 17:21:29,731 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2023-12-02 17:21:29,731 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2023-12-02 17:21:29,731 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2023-12-02 17:21:29,731 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2023-12-02 17:21:29,731 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2023-12-02 17:21:29,731 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift__wrappee__empty [2023-12-02 17:21:29,732 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift__wrappee__empty [2023-12-02 17:21:29,732 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2023-12-02 17:21:29,732 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2023-12-02 17:21:29,732 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2023-12-02 17:21:29,732 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2023-12-02 17:21:29,732 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2023-12-02 17:21:29,732 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2023-12-02 17:21:29,733 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-12-02 17:21:29,733 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2023-12-02 17:21:29,733 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2023-12-02 17:21:29,733 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2023-12-02 17:21:29,733 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2023-12-02 17:21:29,733 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2023-12-02 17:21:29,733 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2023-12-02 17:21:29,733 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-02 17:21:29,734 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-02 17:21:29,734 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2023-12-02 17:21:29,734 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2023-12-02 17:21:29,880 INFO L241 CfgBuilder]: Building ICFG [2023-12-02 17:21:29,882 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-02 17:21:30,825 INFO L282 CfgBuilder]: Performing block encoding [2023-12-02 17:21:31,604 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-02 17:21:31,605 INFO L309 CfgBuilder]: Removed 1 assume(true) statements. [2023-12-02 17:21:31,606 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 05:21:31 BoogieIcfgContainer [2023-12-02 17:21:31,607 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-02 17:21:31,609 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-02 17:21:31,609 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-02 17:21:31,612 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-02 17:21:31,612 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.12 05:21:28" (1/3) ... [2023-12-02 17:21:31,612 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3e857246 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 05:21:31, skipping insertion in model container [2023-12-02 17:21:31,612 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:21:29" (2/3) ... [2023-12-02 17:21:31,613 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3e857246 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 05:21:31, skipping insertion in model container [2023-12-02 17:21:31,613 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 05:21:31" (3/3) ... [2023-12-02 17:21:31,614 INFO L112 eAbstractionObserver]: Analyzing ICFG elevator_spec1_product26.cil.c [2023-12-02 17:21:31,629 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-02 17:21:31,630 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-12-02 17:21:31,680 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-02 17:21:31,686 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;@9857ace, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-02 17:21:31,686 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-12-02 17:21:31,692 INFO L276 IsEmpty]: Start isEmpty. Operand has 363 states, 244 states have (on average 1.610655737704918) internal successors, (393), 267 states have internal predecessors, (393), 94 states have call successors, (94), 23 states have call predecessors, (94), 23 states have return successors, (94), 87 states have call predecessors, (94), 94 states have call successors, (94) [2023-12-02 17:21:31,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2023-12-02 17:21:31,705 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:21:31,706 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 17:21:31,707 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:21:31,711 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:21:31,711 INFO L85 PathProgramCache]: Analyzing trace with hash 1885651054, now seen corresponding path program 1 times [2023-12-02 17:21:31,718 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:21:31,719 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2102778101] [2023-12-02 17:21:31,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:21:31,720 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:21:31,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:21:32,071 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-02 17:21:32,072 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:21:32,072 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2102778101] [2023-12-02 17:21:32,072 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2102778101] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 17:21:32,073 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 17:21:32,073 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-02 17:21:32,074 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [948722229] [2023-12-02 17:21:32,075 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 17:21:32,079 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-12-02 17:21:32,079 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:21:32,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-12-02 17:21:32,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-12-02 17:21:32,109 INFO L87 Difference]: Start difference. First operand has 363 states, 244 states have (on average 1.610655737704918) internal successors, (393), 267 states have internal predecessors, (393), 94 states have call successors, (94), 23 states have call predecessors, (94), 23 states have return successors, (94), 87 states have call predecessors, (94), 94 states have call successors, (94) Second operand has 2 states, 2 states have (on average 14.5) internal successors, (29), 2 states have internal predecessors, (29), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 2 states have call predecessors, (9), 1 states have call successors, (9) [2023-12-02 17:21:32,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:21:32,255 INFO L93 Difference]: Finished difference Result 381 states and 608 transitions. [2023-12-02 17:21:32,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-12-02 17:21:32,257 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 14.5) internal successors, (29), 2 states have internal predecessors, (29), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 2 states have call predecessors, (9), 1 states have call successors, (9) Word has length 50 [2023-12-02 17:21:32,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:21:32,274 INFO L225 Difference]: With dead ends: 381 [2023-12-02 17:21:32,274 INFO L226 Difference]: Without dead ends: 359 [2023-12-02 17:21:32,277 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 [2023-12-02 17:21:32,281 INFO L413 NwaCegarLoop]: 539 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 539 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 17:21:32,282 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 539 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 17:21:32,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 359 states. [2023-12-02 17:21:32,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 359 to 359. [2023-12-02 17:21:32,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 359 states, 242 states have (on average 1.5991735537190082) internal successors, (387), 263 states have internal predecessors, (387), 94 states have call successors, (94), 23 states have call predecessors, (94), 22 states have return successors, (89), 86 states have call predecessors, (89), 89 states have call successors, (89) [2023-12-02 17:21:32,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 359 states to 359 states and 570 transitions. [2023-12-02 17:21:32,371 INFO L78 Accepts]: Start accepts. Automaton has 359 states and 570 transitions. Word has length 50 [2023-12-02 17:21:32,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:21:32,372 INFO L495 AbstractCegarLoop]: Abstraction has 359 states and 570 transitions. [2023-12-02 17:21:32,372 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 14.5) internal successors, (29), 2 states have internal predecessors, (29), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 2 states have call predecessors, (9), 1 states have call successors, (9) [2023-12-02 17:21:32,373 INFO L276 IsEmpty]: Start isEmpty. Operand 359 states and 570 transitions. [2023-12-02 17:21:32,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2023-12-02 17:21:32,377 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:21:32,377 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 17:21:32,378 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-12-02 17:21:32,378 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:21:32,379 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:21:32,379 INFO L85 PathProgramCache]: Analyzing trace with hash 902523787, now seen corresponding path program 1 times [2023-12-02 17:21:32,379 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:21:32,379 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1880838485] [2023-12-02 17:21:32,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:21:32,380 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:21:32,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:21:32,924 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-02 17:21:32,925 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:21:32,925 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1880838485] [2023-12-02 17:21:32,925 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1880838485] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 17:21:32,925 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 17:21:32,926 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-12-02 17:21:32,926 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1540308077] [2023-12-02 17:21:32,926 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 17:21:32,927 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-02 17:21:32,928 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:21:32,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-02 17:21:32,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-12-02 17:21:32,929 INFO L87 Difference]: Start difference. First operand 359 states and 570 transitions. Second operand has 6 states, 6 states have (on average 5.0) internal successors, (30), 6 states have internal predecessors, (30), 5 states have call successors, (10), 4 states have call predecessors, (10), 2 states have return successors, (9), 5 states have call predecessors, (9), 4 states have call successors, (9) [2023-12-02 17:21:34,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:21:34,902 INFO L93 Difference]: Finished difference Result 1163 states and 1893 transitions. [2023-12-02 17:21:34,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-02 17:21:34,903 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.0) internal successors, (30), 6 states have internal predecessors, (30), 5 states have call successors, (10), 4 states have call predecessors, (10), 2 states have return successors, (9), 5 states have call predecessors, (9), 4 states have call successors, (9) Word has length 51 [2023-12-02 17:21:34,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:21:34,910 INFO L225 Difference]: With dead ends: 1163 [2023-12-02 17:21:34,911 INFO L226 Difference]: Without dead ends: 827 [2023-12-02 17:21:34,916 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2023-12-02 17:21:34,917 INFO L413 NwaCegarLoop]: 284 mSDtfsCounter, 1910 mSDsluCounter, 451 mSDsCounter, 0 mSdLazyCounter, 1219 mSolverCounterSat, 733 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1970 SdHoareTripleChecker+Valid, 735 SdHoareTripleChecker+Invalid, 1952 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 733 IncrementalHoareTripleChecker+Valid, 1219 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2023-12-02 17:21:34,918 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1970 Valid, 735 Invalid, 1952 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [733 Valid, 1219 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2023-12-02 17:21:34,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 827 states. [2023-12-02 17:21:34,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 827 to 740. [2023-12-02 17:21:34,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 740 states, 524 states have (on average 1.6278625954198473) internal successors, (853), 554 states have internal predecessors, (853), 177 states have call successors, (177), 37 states have call predecessors, (177), 38 states have return successors, (179), 161 states have call predecessors, (179), 172 states have call successors, (179) [2023-12-02 17:21:34,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 740 states to 740 states and 1209 transitions. [2023-12-02 17:21:34,998 INFO L78 Accepts]: Start accepts. Automaton has 740 states and 1209 transitions. Word has length 51 [2023-12-02 17:21:34,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:21:34,999 INFO L495 AbstractCegarLoop]: Abstraction has 740 states and 1209 transitions. [2023-12-02 17:21:34,999 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.0) internal successors, (30), 6 states have internal predecessors, (30), 5 states have call successors, (10), 4 states have call predecessors, (10), 2 states have return successors, (9), 5 states have call predecessors, (9), 4 states have call successors, (9) [2023-12-02 17:21:34,999 INFO L276 IsEmpty]: Start isEmpty. Operand 740 states and 1209 transitions. [2023-12-02 17:21:35,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2023-12-02 17:21:35,004 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:21:35,005 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 17:21:35,005 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-12-02 17:21:35,005 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:21:35,006 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:21:35,006 INFO L85 PathProgramCache]: Analyzing trace with hash -1559231367, now seen corresponding path program 1 times [2023-12-02 17:21:35,006 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:21:35,006 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1982703942] [2023-12-02 17:21:35,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:21:35,006 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:21:35,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:21:35,507 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-02 17:21:35,507 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:21:35,507 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1982703942] [2023-12-02 17:21:35,507 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1982703942] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 17:21:35,508 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 17:21:35,508 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-12-02 17:21:35,508 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1284179009] [2023-12-02 17:21:35,508 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 17:21:35,509 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-02 17:21:35,509 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:21:35,510 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-02 17:21:35,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-12-02 17:21:35,510 INFO L87 Difference]: Start difference. First operand 740 states and 1209 transitions. Second operand has 7 states, 7 states have (on average 6.285714285714286) internal successors, (44), 7 states have internal predecessors, (44), 5 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (13), 5 states have call predecessors, (13), 4 states have call successors, (13) [2023-12-02 17:21:37,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:21:37,639 INFO L93 Difference]: Finished difference Result 2506 states and 4147 transitions. [2023-12-02 17:21:37,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-12-02 17:21:37,640 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.285714285714286) internal successors, (44), 7 states have internal predecessors, (44), 5 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (13), 5 states have call predecessors, (13), 4 states have call successors, (13) Word has length 73 [2023-12-02 17:21:37,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:21:37,653 INFO L225 Difference]: With dead ends: 2506 [2023-12-02 17:21:37,653 INFO L226 Difference]: Without dead ends: 1790 [2023-12-02 17:21:37,657 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=67, Invalid=173, Unknown=0, NotChecked=0, Total=240 [2023-12-02 17:21:37,659 INFO L413 NwaCegarLoop]: 385 mSDtfsCounter, 1646 mSDsluCounter, 1303 mSDsCounter, 0 mSdLazyCounter, 2297 mSolverCounterSat, 501 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1709 SdHoareTripleChecker+Valid, 1688 SdHoareTripleChecker+Invalid, 2798 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 501 IncrementalHoareTripleChecker+Valid, 2297 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2023-12-02 17:21:37,660 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1709 Valid, 1688 Invalid, 2798 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [501 Valid, 2297 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2023-12-02 17:21:37,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1790 states. [2023-12-02 17:21:37,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1790 to 1703. [2023-12-02 17:21:37,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1703 states, 1236 states have (on average 1.6472491909385114) internal successors, (2036), 1296 states have internal predecessors, (2036), 379 states have call successors, (379), 76 states have call predecessors, (379), 87 states have return successors, (406), 354 states have call predecessors, (406), 374 states have call successors, (406) [2023-12-02 17:21:37,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1703 states to 1703 states and 2821 transitions. [2023-12-02 17:21:37,784 INFO L78 Accepts]: Start accepts. Automaton has 1703 states and 2821 transitions. Word has length 73 [2023-12-02 17:21:37,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:21:37,785 INFO L495 AbstractCegarLoop]: Abstraction has 1703 states and 2821 transitions. [2023-12-02 17:21:37,785 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.285714285714286) internal successors, (44), 7 states have internal predecessors, (44), 5 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (13), 5 states have call predecessors, (13), 4 states have call successors, (13) [2023-12-02 17:21:37,786 INFO L276 IsEmpty]: Start isEmpty. Operand 1703 states and 2821 transitions. [2023-12-02 17:21:37,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2023-12-02 17:21:37,789 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:21:37,789 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 17:21:37,789 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-12-02 17:21:37,790 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:21:37,790 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:21:37,790 INFO L85 PathProgramCache]: Analyzing trace with hash 393474966, now seen corresponding path program 1 times [2023-12-02 17:21:37,790 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:21:37,791 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1014307024] [2023-12-02 17:21:37,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:21:37,791 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:21:37,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:21:38,141 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-02 17:21:38,141 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:21:38,142 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1014307024] [2023-12-02 17:21:38,142 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1014307024] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 17:21:38,142 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 17:21:38,142 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-12-02 17:21:38,142 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [164559522] [2023-12-02 17:21:38,142 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 17:21:38,143 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-12-02 17:21:38,143 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:21:38,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-12-02 17:21:38,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-12-02 17:21:38,144 INFO L87 Difference]: Start difference. First operand 1703 states and 2821 transitions. Second operand has 8 states, 7 states have (on average 6.428571428571429) internal successors, (45), 7 states have internal predecessors, (45), 5 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (14), 5 states have call predecessors, (14), 4 states have call successors, (14) [2023-12-02 17:21:40,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:21:40,777 INFO L93 Difference]: Finished difference Result 4677 states and 7767 transitions. [2023-12-02 17:21:40,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-12-02 17:21:40,777 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 6.428571428571429) internal successors, (45), 7 states have internal predecessors, (45), 5 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (14), 5 states have call predecessors, (14), 4 states have call successors, (14) Word has length 76 [2023-12-02 17:21:40,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:21:40,795 INFO L225 Difference]: With dead ends: 4677 [2023-12-02 17:21:40,795 INFO L226 Difference]: Without dead ends: 2997 [2023-12-02 17:21:40,803 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=84, Invalid=336, Unknown=0, NotChecked=0, Total=420 [2023-12-02 17:21:40,805 INFO L413 NwaCegarLoop]: 504 mSDtfsCounter, 1283 mSDsluCounter, 1487 mSDsCounter, 0 mSdLazyCounter, 3806 mSolverCounterSat, 610 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1351 SdHoareTripleChecker+Valid, 1991 SdHoareTripleChecker+Invalid, 4416 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 610 IncrementalHoareTripleChecker+Valid, 3806 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2023-12-02 17:21:40,805 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1351 Valid, 1991 Invalid, 4416 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [610 Valid, 3806 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2023-12-02 17:21:40,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2997 states. [2023-12-02 17:21:40,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2997 to 2792. [2023-12-02 17:21:40,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2792 states, 1995 states have (on average 1.6340852130325814) internal successors, (3260), 2098 states have internal predecessors, (3260), 660 states have call successors, (660), 112 states have call predecessors, (660), 136 states have return successors, (705), 626 states have call predecessors, (705), 655 states have call successors, (705) [2023-12-02 17:21:40,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2792 states to 2792 states and 4625 transitions. [2023-12-02 17:21:40,987 INFO L78 Accepts]: Start accepts. Automaton has 2792 states and 4625 transitions. Word has length 76 [2023-12-02 17:21:40,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:21:40,987 INFO L495 AbstractCegarLoop]: Abstraction has 2792 states and 4625 transitions. [2023-12-02 17:21:40,988 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 6.428571428571429) internal successors, (45), 7 states have internal predecessors, (45), 5 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (14), 5 states have call predecessors, (14), 4 states have call successors, (14) [2023-12-02 17:21:40,988 INFO L276 IsEmpty]: Start isEmpty. Operand 2792 states and 4625 transitions. [2023-12-02 17:21:40,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2023-12-02 17:21:40,991 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:21:40,991 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 17:21:40,991 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-12-02 17:21:40,991 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:21:40,992 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:21:40,992 INFO L85 PathProgramCache]: Analyzing trace with hash -1898589688, now seen corresponding path program 1 times [2023-12-02 17:21:40,992 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:21:40,992 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1521641971] [2023-12-02 17:21:40,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:21:40,992 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:21:41,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:21:41,195 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-02 17:21:41,195 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:21:41,195 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1521641971] [2023-12-02 17:21:41,196 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1521641971] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 17:21:41,196 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 17:21:41,196 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-12-02 17:21:41,196 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [260238805] [2023-12-02 17:21:41,196 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 17:21:41,197 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-02 17:21:41,197 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:21:41,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-02 17:21:41,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-12-02 17:21:41,198 INFO L87 Difference]: Start difference. First operand 2792 states and 4625 transitions. Second operand has 5 states, 5 states have (on average 9.2) internal successors, (46), 4 states have internal predecessors, (46), 2 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (14), 3 states have call predecessors, (14), 2 states have call successors, (14) [2023-12-02 17:21:41,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:21:41,449 INFO L93 Difference]: Finished difference Result 4941 states and 8201 transitions. [2023-12-02 17:21:41,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-02 17:21:41,449 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.2) internal successors, (46), 4 states have internal predecessors, (46), 2 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (14), 3 states have call predecessors, (14), 2 states have call successors, (14) Word has length 77 [2023-12-02 17:21:41,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:21:41,465 INFO L225 Difference]: With dead ends: 4941 [2023-12-02 17:21:41,465 INFO L226 Difference]: Without dead ends: 2856 [2023-12-02 17:21:41,474 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-12-02 17:21:41,475 INFO L413 NwaCegarLoop]: 538 mSDtfsCounter, 7 mSDsluCounter, 1581 mSDsCounter, 0 mSdLazyCounter, 159 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 2119 SdHoareTripleChecker+Invalid, 161 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 159 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 17:21:41,475 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 2119 Invalid, 161 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 159 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 17:21:41,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2856 states. [2023-12-02 17:21:41,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2856 to 2832. [2023-12-02 17:21:41,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2832 states, 2025 states have (on average 1.6246913580246913) internal successors, (3290), 2128 states have internal predecessors, (3290), 660 states have call successors, (660), 112 states have call predecessors, (660), 146 states have return successors, (725), 636 states have call predecessors, (725), 655 states have call successors, (725) [2023-12-02 17:21:41,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2832 states to 2832 states and 4675 transitions. [2023-12-02 17:21:41,661 INFO L78 Accepts]: Start accepts. Automaton has 2832 states and 4675 transitions. Word has length 77 [2023-12-02 17:21:41,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:21:41,661 INFO L495 AbstractCegarLoop]: Abstraction has 2832 states and 4675 transitions. [2023-12-02 17:21:41,661 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.2) internal successors, (46), 4 states have internal predecessors, (46), 2 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (14), 3 states have call predecessors, (14), 2 states have call successors, (14) [2023-12-02 17:21:41,661 INFO L276 IsEmpty]: Start isEmpty. Operand 2832 states and 4675 transitions. [2023-12-02 17:21:41,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2023-12-02 17:21:41,664 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:21:41,664 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 17:21:41,665 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-12-02 17:21:41,665 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:21:41,665 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:21:41,665 INFO L85 PathProgramCache]: Analyzing trace with hash -1360653072, now seen corresponding path program 1 times [2023-12-02 17:21:41,665 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:21:41,666 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [983683353] [2023-12-02 17:21:41,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:21:41,666 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:21:41,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:21:42,052 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-02 17:21:42,052 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:21:42,052 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [983683353] [2023-12-02 17:21:42,052 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [983683353] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 17:21:42,053 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 17:21:42,053 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-12-02 17:21:42,053 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1153514071] [2023-12-02 17:21:42,053 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 17:21:42,053 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-12-02 17:21:42,054 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:21:42,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-12-02 17:21:42,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-12-02 17:21:42,055 INFO L87 Difference]: Start difference. First operand 2832 states and 4675 transitions. Second operand has 8 states, 8 states have (on average 6.25) internal successors, (50), 8 states have internal predecessors, (50), 6 states have call successors, (15), 4 states have call predecessors, (15), 3 states have return successors, (14), 7 states have call predecessors, (14), 5 states have call successors, (14) [2023-12-02 17:21:44,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:21:44,100 INFO L93 Difference]: Finished difference Result 7042 states and 11647 transitions. [2023-12-02 17:21:44,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-12-02 17:21:44,101 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.25) internal successors, (50), 8 states have internal predecessors, (50), 6 states have call successors, (15), 4 states have call predecessors, (15), 3 states have return successors, (14), 7 states have call predecessors, (14), 5 states have call successors, (14) Word has length 81 [2023-12-02 17:21:44,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:21:44,126 INFO L225 Difference]: With dead ends: 7042 [2023-12-02 17:21:44,126 INFO L226 Difference]: Without dead ends: 4725 [2023-12-02 17:21:44,138 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2023-12-02 17:21:44,139 INFO L413 NwaCegarLoop]: 497 mSDtfsCounter, 2250 mSDsluCounter, 859 mSDsCounter, 0 mSdLazyCounter, 1920 mSolverCounterSat, 939 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2398 SdHoareTripleChecker+Valid, 1356 SdHoareTripleChecker+Invalid, 2859 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 939 IncrementalHoareTripleChecker+Valid, 1920 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2023-12-02 17:21:44,139 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2398 Valid, 1356 Invalid, 2859 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [939 Valid, 1920 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2023-12-02 17:21:44,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4725 states. [2023-12-02 17:21:44,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4725 to 4590. [2023-12-02 17:21:44,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4590 states, 3214 states have (on average 1.5821406347230864) internal successors, (5085), 3395 states have internal predecessors, (5085), 1116 states have call successors, (1116), 199 states have call predecessors, (1116), 259 states have return successors, (1252), 1073 states have call predecessors, (1252), 1111 states have call successors, (1252) [2023-12-02 17:21:44,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4590 states to 4590 states and 7453 transitions. [2023-12-02 17:21:44,469 INFO L78 Accepts]: Start accepts. Automaton has 4590 states and 7453 transitions. Word has length 81 [2023-12-02 17:21:44,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:21:44,470 INFO L495 AbstractCegarLoop]: Abstraction has 4590 states and 7453 transitions. [2023-12-02 17:21:44,470 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.25) internal successors, (50), 8 states have internal predecessors, (50), 6 states have call successors, (15), 4 states have call predecessors, (15), 3 states have return successors, (14), 7 states have call predecessors, (14), 5 states have call successors, (14) [2023-12-02 17:21:44,470 INFO L276 IsEmpty]: Start isEmpty. Operand 4590 states and 7453 transitions. [2023-12-02 17:21:44,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2023-12-02 17:21:44,473 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:21:44,473 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 17:21:44,473 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-12-02 17:21:44,473 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:21:44,474 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:21:44,474 INFO L85 PathProgramCache]: Analyzing trace with hash -25854062, now seen corresponding path program 1 times [2023-12-02 17:21:44,474 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:21:44,474 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1228492124] [2023-12-02 17:21:44,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:21:44,474 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:21:44,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:21:44,955 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-02 17:21:44,955 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:21:44,955 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1228492124] [2023-12-02 17:21:44,955 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1228492124] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 17:21:44,955 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 17:21:44,955 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-12-02 17:21:44,956 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1518969390] [2023-12-02 17:21:44,956 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 17:21:44,956 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-12-02 17:21:44,956 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:21:44,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-12-02 17:21:44,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2023-12-02 17:21:44,957 INFO L87 Difference]: Start difference. First operand 4590 states and 7453 transitions. Second operand has 11 states, 10 states have (on average 5.3) internal successors, (53), 10 states have internal predecessors, (53), 6 states have call successors, (15), 3 states have call predecessors, (15), 5 states have return successors, (14), 6 states have call predecessors, (14), 6 states have call successors, (14) [2023-12-02 17:21:48,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:21:48,356 INFO L93 Difference]: Finished difference Result 9423 states and 15539 transitions. [2023-12-02 17:21:48,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-12-02 17:21:48,357 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 5.3) internal successors, (53), 10 states have internal predecessors, (53), 6 states have call successors, (15), 3 states have call predecessors, (15), 5 states have return successors, (14), 6 states have call predecessors, (14), 6 states have call successors, (14) Word has length 84 [2023-12-02 17:21:48,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:21:48,392 INFO L225 Difference]: With dead ends: 9423 [2023-12-02 17:21:48,392 INFO L226 Difference]: Without dead ends: 4808 [2023-12-02 17:21:48,417 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 217 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=161, Invalid=895, Unknown=0, NotChecked=0, Total=1056 [2023-12-02 17:21:48,418 INFO L413 NwaCegarLoop]: 500 mSDtfsCounter, 2051 mSDsluCounter, 2758 mSDsCounter, 0 mSdLazyCounter, 5130 mSolverCounterSat, 1114 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2069 SdHoareTripleChecker+Valid, 3258 SdHoareTripleChecker+Invalid, 6244 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1114 IncrementalHoareTripleChecker+Valid, 5130 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2023-12-02 17:21:48,418 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2069 Valid, 3258 Invalid, 6244 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1114 Valid, 5130 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2023-12-02 17:21:48,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4808 states. [2023-12-02 17:21:48,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4808 to 4626. [2023-12-02 17:21:48,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4626 states, 3239 states have (on average 1.54492127199753) internal successors, (5004), 3420 states have internal predecessors, (5004), 1121 states have call successors, (1121), 205 states have call predecessors, (1121), 265 states have return successors, (1257), 1077 states have call predecessors, (1257), 1116 states have call successors, (1257) [2023-12-02 17:21:48,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4626 states to 4626 states and 7382 transitions. [2023-12-02 17:21:48,859 INFO L78 Accepts]: Start accepts. Automaton has 4626 states and 7382 transitions. Word has length 84 [2023-12-02 17:21:48,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:21:48,860 INFO L495 AbstractCegarLoop]: Abstraction has 4626 states and 7382 transitions. [2023-12-02 17:21:48,860 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 5.3) internal successors, (53), 10 states have internal predecessors, (53), 6 states have call successors, (15), 3 states have call predecessors, (15), 5 states have return successors, (14), 6 states have call predecessors, (14), 6 states have call successors, (14) [2023-12-02 17:21:48,860 INFO L276 IsEmpty]: Start isEmpty. Operand 4626 states and 7382 transitions. [2023-12-02 17:21:48,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2023-12-02 17:21:48,863 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:21:48,863 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 17:21:48,863 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-12-02 17:21:48,864 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:21:48,864 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:21:48,864 INFO L85 PathProgramCache]: Analyzing trace with hash 1642672924, now seen corresponding path program 1 times [2023-12-02 17:21:48,864 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:21:48,864 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [525409850] [2023-12-02 17:21:48,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:21:48,865 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:21:48,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:21:49,224 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-12-02 17:21:49,224 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:21:49,224 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [525409850] [2023-12-02 17:21:49,224 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [525409850] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 17:21:49,224 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 17:21:49,225 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-12-02 17:21:49,225 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [552521139] [2023-12-02 17:21:49,225 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 17:21:49,225 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-02 17:21:49,225 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:21:49,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-02 17:21:49,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-12-02 17:21:49,226 INFO L87 Difference]: Start difference. First operand 4626 states and 7382 transitions. Second operand has 7 states, 7 states have (on average 7.428571428571429) internal successors, (52), 7 states have internal predecessors, (52), 4 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 5 states have call predecessors, (15), 3 states have call successors, (15) [2023-12-02 17:21:50,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:21:50,817 INFO L93 Difference]: Finished difference Result 9171 states and 14674 transitions. [2023-12-02 17:21:50,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-12-02 17:21:50,817 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.428571428571429) internal successors, (52), 7 states have internal predecessors, (52), 4 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 5 states have call predecessors, (15), 3 states have call successors, (15) Word has length 86 [2023-12-02 17:21:50,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:21:50,848 INFO L225 Difference]: With dead ends: 9171 [2023-12-02 17:21:50,848 INFO L226 Difference]: Without dead ends: 5174 [2023-12-02 17:21:50,864 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2023-12-02 17:21:50,865 INFO L413 NwaCegarLoop]: 371 mSDtfsCounter, 931 mSDsluCounter, 1209 mSDsCounter, 0 mSdLazyCounter, 2111 mSolverCounterSat, 380 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1001 SdHoareTripleChecker+Valid, 1580 SdHoareTripleChecker+Invalid, 2491 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 380 IncrementalHoareTripleChecker+Valid, 2111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2023-12-02 17:21:50,865 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1001 Valid, 1580 Invalid, 2491 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [380 Valid, 2111 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2023-12-02 17:21:50,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5174 states. [2023-12-02 17:21:51,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5174 to 4716. [2023-12-02 17:21:51,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4716 states, 3299 states have (on average 1.5392543194907549) internal successors, (5078), 3494 states have internal predecessors, (5078), 1123 states have call successors, (1123), 221 states have call predecessors, (1123), 293 states have return successors, (1295), 1077 states have call predecessors, (1295), 1118 states have call successors, (1295) [2023-12-02 17:21:51,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4716 states to 4716 states and 7496 transitions. [2023-12-02 17:21:51,218 INFO L78 Accepts]: Start accepts. Automaton has 4716 states and 7496 transitions. Word has length 86 [2023-12-02 17:21:51,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:21:51,219 INFO L495 AbstractCegarLoop]: Abstraction has 4716 states and 7496 transitions. [2023-12-02 17:21:51,219 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.428571428571429) internal successors, (52), 7 states have internal predecessors, (52), 4 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 5 states have call predecessors, (15), 3 states have call successors, (15) [2023-12-02 17:21:51,219 INFO L276 IsEmpty]: Start isEmpty. Operand 4716 states and 7496 transitions. [2023-12-02 17:21:51,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2023-12-02 17:21:51,221 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:21:51,221 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 17:21:51,221 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-12-02 17:21:51,221 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:21:51,222 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:21:51,222 INFO L85 PathProgramCache]: Analyzing trace with hash -2045128252, now seen corresponding path program 1 times [2023-12-02 17:21:51,222 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:21:51,222 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [473832524] [2023-12-02 17:21:51,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:21:51,223 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:21:51,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:21:51,447 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-12-02 17:21:51,447 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:21:51,447 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [473832524] [2023-12-02 17:21:51,448 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [473832524] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 17:21:51,448 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 17:21:51,448 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-12-02 17:21:51,448 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [266093487] [2023-12-02 17:21:51,448 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 17:21:51,448 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-02 17:21:51,449 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:21:51,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-02 17:21:51,449 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-12-02 17:21:51,450 INFO L87 Difference]: Start difference. First operand 4716 states and 7496 transitions. Second operand has 6 states, 6 states have (on average 8.833333333333334) internal successors, (53), 6 states have internal predecessors, (53), 3 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (17), 3 states have call predecessors, (17), 2 states have call successors, (17) [2023-12-02 17:21:52,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:21:52,106 INFO L93 Difference]: Finished difference Result 4818 states and 7662 transitions. [2023-12-02 17:21:52,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-02 17:21:52,107 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.833333333333334) internal successors, (53), 6 states have internal predecessors, (53), 3 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (17), 3 states have call predecessors, (17), 2 states have call successors, (17) Word has length 93 [2023-12-02 17:21:52,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:21:52,136 INFO L225 Difference]: With dead ends: 4818 [2023-12-02 17:21:52,136 INFO L226 Difference]: Without dead ends: 4803 [2023-12-02 17:21:52,140 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2023-12-02 17:21:52,140 INFO L413 NwaCegarLoop]: 518 mSDtfsCounter, 623 mSDsluCounter, 1203 mSDsCounter, 0 mSdLazyCounter, 518 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 624 SdHoareTripleChecker+Valid, 1721 SdHoareTripleChecker+Invalid, 533 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 518 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-02 17:21:52,141 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [624 Valid, 1721 Invalid, 533 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 518 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-02 17:21:52,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4803 states. [2023-12-02 17:21:52,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4803 to 4722. [2023-12-02 17:21:52,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4722 states, 3305 states have (on average 1.5382753403933433) internal successors, (5084), 3500 states have internal predecessors, (5084), 1123 states have call successors, (1123), 221 states have call predecessors, (1123), 293 states have return successors, (1295), 1077 states have call predecessors, (1295), 1118 states have call successors, (1295) [2023-12-02 17:21:52,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4722 states to 4722 states and 7502 transitions. [2023-12-02 17:21:52,481 INFO L78 Accepts]: Start accepts. Automaton has 4722 states and 7502 transitions. Word has length 93 [2023-12-02 17:21:52,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:21:52,481 INFO L495 AbstractCegarLoop]: Abstraction has 4722 states and 7502 transitions. [2023-12-02 17:21:52,481 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.833333333333334) internal successors, (53), 6 states have internal predecessors, (53), 3 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (17), 3 states have call predecessors, (17), 2 states have call successors, (17) [2023-12-02 17:21:52,482 INFO L276 IsEmpty]: Start isEmpty. Operand 4722 states and 7502 transitions. [2023-12-02 17:21:52,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2023-12-02 17:21:52,485 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:21:52,485 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 17:21:52,485 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-12-02 17:21:52,485 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:21:52,485 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:21:52,486 INFO L85 PathProgramCache]: Analyzing trace with hash -1486550297, now seen corresponding path program 1 times [2023-12-02 17:21:52,486 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:21:52,486 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1225066476] [2023-12-02 17:21:52,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:21:52,486 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:21:52,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:21:52,990 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-12-02 17:21:52,990 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:21:52,990 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1225066476] [2023-12-02 17:21:52,990 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1225066476] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 17:21:52,990 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 17:21:52,990 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2023-12-02 17:21:52,990 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [450659368] [2023-12-02 17:21:52,990 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 17:21:52,991 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-12-02 17:21:52,991 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:21:52,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-12-02 17:21:52,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2023-12-02 17:21:52,992 INFO L87 Difference]: Start difference. First operand 4722 states and 7502 transitions. Second operand has 13 states, 11 states have (on average 5.090909090909091) internal successors, (56), 11 states have internal predecessors, (56), 5 states have call successors, (18), 3 states have call predecessors, (18), 5 states have return successors, (17), 6 states have call predecessors, (17), 4 states have call successors, (17) [2023-12-02 17:21:56,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:21:56,858 INFO L93 Difference]: Finished difference Result 5298 states and 8396 transitions. [2023-12-02 17:21:56,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2023-12-02 17:21:56,859 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 5.090909090909091) internal successors, (56), 11 states have internal predecessors, (56), 5 states have call successors, (18), 3 states have call predecessors, (18), 5 states have return successors, (17), 6 states have call predecessors, (17), 4 states have call successors, (17) Word has length 95 [2023-12-02 17:21:56,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:21:56,878 INFO L225 Difference]: With dead ends: 5298 [2023-12-02 17:21:56,879 INFO L226 Difference]: Without dead ends: 5281 [2023-12-02 17:21:56,882 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 714 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=375, Invalid=2277, Unknown=0, NotChecked=0, Total=2652 [2023-12-02 17:21:56,883 INFO L413 NwaCegarLoop]: 515 mSDtfsCounter, 2577 mSDsluCounter, 3175 mSDsCounter, 0 mSdLazyCounter, 6434 mSolverCounterSat, 1368 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2600 SdHoareTripleChecker+Valid, 3690 SdHoareTripleChecker+Invalid, 7802 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1368 IncrementalHoareTripleChecker+Valid, 6434 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2023-12-02 17:21:56,883 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2600 Valid, 3690 Invalid, 7802 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1368 Valid, 6434 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2023-12-02 17:21:56,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5281 states. [2023-12-02 17:21:57,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5281 to 5004. [2023-12-02 17:21:57,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5004 states, 3531 states have (on average 1.5465873690172756) internal successors, (5461), 3724 states have internal predecessors, (5461), 1142 states have call successors, (1142), 259 states have call predecessors, (1142), 330 states have return successors, (1318), 1097 states have call predecessors, (1318), 1137 states have call successors, (1318) [2023-12-02 17:21:57,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5004 states to 5004 states and 7921 transitions. [2023-12-02 17:21:57,201 INFO L78 Accepts]: Start accepts. Automaton has 5004 states and 7921 transitions. Word has length 95 [2023-12-02 17:21:57,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:21:57,201 INFO L495 AbstractCegarLoop]: Abstraction has 5004 states and 7921 transitions. [2023-12-02 17:21:57,202 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 5.090909090909091) internal successors, (56), 11 states have internal predecessors, (56), 5 states have call successors, (18), 3 states have call predecessors, (18), 5 states have return successors, (17), 6 states have call predecessors, (17), 4 states have call successors, (17) [2023-12-02 17:21:57,202 INFO L276 IsEmpty]: Start isEmpty. Operand 5004 states and 7921 transitions. [2023-12-02 17:21:57,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2023-12-02 17:21:57,204 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:21:57,205 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 17:21:57,205 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-12-02 17:21:57,205 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:21:57,205 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:21:57,205 INFO L85 PathProgramCache]: Analyzing trace with hash -456433715, now seen corresponding path program 1 times [2023-12-02 17:21:57,205 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:21:57,206 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [303401523] [2023-12-02 17:21:57,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:21:57,206 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:21:57,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:21:58,668 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-12-02 17:21:58,669 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:21:58,669 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [303401523] [2023-12-02 17:21:58,669 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [303401523] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 17:21:58,669 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 17:21:58,669 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2023-12-02 17:21:58,669 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1161421934] [2023-12-02 17:21:58,669 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 17:21:58,670 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-12-02 17:21:58,670 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:21:58,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-12-02 17:21:58,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=325, Unknown=0, NotChecked=0, Total=380 [2023-12-02 17:21:58,671 INFO L87 Difference]: Start difference. First operand 5004 states and 7921 transitions. Second operand has 20 states, 17 states have (on average 3.5294117647058822) internal successors, (60), 16 states have internal predecessors, (60), 10 states have call successors, (20), 5 states have call predecessors, (20), 7 states have return successors, (19), 10 states have call predecessors, (19), 9 states have call successors, (19) [2023-12-02 17:22:04,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:22:04,300 INFO L93 Difference]: Finished difference Result 6003 states and 9612 transitions. [2023-12-02 17:22:04,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2023-12-02 17:22:04,301 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 17 states have (on average 3.5294117647058822) internal successors, (60), 16 states have internal predecessors, (60), 10 states have call successors, (20), 5 states have call predecessors, (20), 7 states have return successors, (19), 10 states have call predecessors, (19), 9 states have call successors, (19) Word has length 105 [2023-12-02 17:22:04,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:22:04,331 INFO L225 Difference]: With dead ends: 6003 [2023-12-02 17:22:04,331 INFO L226 Difference]: Without dead ends: 5714 [2023-12-02 17:22:04,339 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 890 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=518, Invalid=3142, Unknown=0, NotChecked=0, Total=3660 [2023-12-02 17:22:04,340 INFO L413 NwaCegarLoop]: 505 mSDtfsCounter, 2922 mSDsluCounter, 4278 mSDsCounter, 0 mSdLazyCounter, 7920 mSolverCounterSat, 1050 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2997 SdHoareTripleChecker+Valid, 4783 SdHoareTripleChecker+Invalid, 8970 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1050 IncrementalHoareTripleChecker+Valid, 7920 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2023-12-02 17:22:04,340 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2997 Valid, 4783 Invalid, 8970 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1050 Valid, 7920 Invalid, 0 Unknown, 0 Unchecked, 4.2s Time] [2023-12-02 17:22:04,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5714 states. [2023-12-02 17:22:04,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5714 to 5339. [2023-12-02 17:22:04,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5339 states, 3798 states have (on average 1.55028962611901) internal successors, (5888), 3999 states have internal predecessors, (5888), 1189 states have call successors, (1189), 276 states have call predecessors, (1189), 351 states have return successors, (1384), 1140 states have call predecessors, (1384), 1184 states have call successors, (1384) [2023-12-02 17:22:04,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5339 states to 5339 states and 8461 transitions. [2023-12-02 17:22:04,807 INFO L78 Accepts]: Start accepts. Automaton has 5339 states and 8461 transitions. Word has length 105 [2023-12-02 17:22:04,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:22:04,807 INFO L495 AbstractCegarLoop]: Abstraction has 5339 states and 8461 transitions. [2023-12-02 17:22:04,807 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 17 states have (on average 3.5294117647058822) internal successors, (60), 16 states have internal predecessors, (60), 10 states have call successors, (20), 5 states have call predecessors, (20), 7 states have return successors, (19), 10 states have call predecessors, (19), 9 states have call successors, (19) [2023-12-02 17:22:04,808 INFO L276 IsEmpty]: Start isEmpty. Operand 5339 states and 8461 transitions. [2023-12-02 17:22:04,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2023-12-02 17:22:04,810 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:22:04,810 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 17:22:04,811 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-12-02 17:22:04,811 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:22:04,811 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:22:04,811 INFO L85 PathProgramCache]: Analyzing trace with hash 1104323073, now seen corresponding path program 1 times [2023-12-02 17:22:04,811 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:22:04,812 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1762924408] [2023-12-02 17:22:04,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:22:04,812 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:22:04,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:22:05,098 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-12-02 17:22:05,098 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:22:05,098 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1762924408] [2023-12-02 17:22:05,098 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1762924408] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 17:22:05,098 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 17:22:05,098 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-12-02 17:22:05,099 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1550572399] [2023-12-02 17:22:05,099 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 17:22:05,099 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-02 17:22:05,099 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:22:05,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-02 17:22:05,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-12-02 17:22:05,100 INFO L87 Difference]: Start difference. First operand 5339 states and 8461 transitions. Second operand has 5 states, 5 states have (on average 12.2) internal successors, (61), 5 states have internal predecessors, (61), 4 states have call successors, (20), 3 states have call predecessors, (20), 3 states have return successors, (19), 4 states have call predecessors, (19), 3 states have call successors, (19) [2023-12-02 17:22:07,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:22:07,235 INFO L93 Difference]: Finished difference Result 14543 states and 23310 transitions. [2023-12-02 17:22:07,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-02 17:22:07,236 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.2) internal successors, (61), 5 states have internal predecessors, (61), 4 states have call successors, (20), 3 states have call predecessors, (20), 3 states have return successors, (19), 4 states have call predecessors, (19), 3 states have call successors, (19) Word has length 106 [2023-12-02 17:22:07,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:22:07,273 INFO L225 Difference]: With dead ends: 14543 [2023-12-02 17:22:07,273 INFO L226 Difference]: Without dead ends: 9245 [2023-12-02 17:22:07,294 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-12-02 17:22:07,295 INFO L413 NwaCegarLoop]: 347 mSDtfsCounter, 1225 mSDsluCounter, 582 mSDsCounter, 0 mSdLazyCounter, 1580 mSolverCounterSat, 443 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1279 SdHoareTripleChecker+Valid, 929 SdHoareTripleChecker+Invalid, 2023 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 443 IncrementalHoareTripleChecker+Valid, 1580 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2023-12-02 17:22:07,295 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1279 Valid, 929 Invalid, 2023 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [443 Valid, 1580 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2023-12-02 17:22:07,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9245 states. [2023-12-02 17:22:08,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9245 to 8752. [2023-12-02 17:22:08,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8752 states, 6296 states have (on average 1.5524142312579416) internal successors, (9774), 6631 states have internal predecessors, (9774), 1885 states have call successors, (1885), 442 states have call predecessors, (1885), 570 states have return successors, (2268), 1790 states have call predecessors, (2268), 1880 states have call successors, (2268) [2023-12-02 17:22:08,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8752 states to 8752 states and 13927 transitions. [2023-12-02 17:22:08,063 INFO L78 Accepts]: Start accepts. Automaton has 8752 states and 13927 transitions. Word has length 106 [2023-12-02 17:22:08,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:22:08,064 INFO L495 AbstractCegarLoop]: Abstraction has 8752 states and 13927 transitions. [2023-12-02 17:22:08,064 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.2) internal successors, (61), 5 states have internal predecessors, (61), 4 states have call successors, (20), 3 states have call predecessors, (20), 3 states have return successors, (19), 4 states have call predecessors, (19), 3 states have call successors, (19) [2023-12-02 17:22:08,064 INFO L276 IsEmpty]: Start isEmpty. Operand 8752 states and 13927 transitions. [2023-12-02 17:22:08,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2023-12-02 17:22:08,067 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:22:08,067 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 17:22:08,067 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-12-02 17:22:08,067 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:22:08,068 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:22:08,068 INFO L85 PathProgramCache]: Analyzing trace with hash -19416708, now seen corresponding path program 1 times [2023-12-02 17:22:08,068 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:22:08,068 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1777443950] [2023-12-02 17:22:08,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:22:08,068 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:22:08,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:22:09,493 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-12-02 17:22:09,493 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:22:09,493 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1777443950] [2023-12-02 17:22:09,493 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1777443950] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 17:22:09,494 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1474303235] [2023-12-02 17:22:09,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:22:09,494 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:22:09,494 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be2d219d-1f53-4702-9ced-591a2bfd8062/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 17:22:09,495 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be2d219d-1f53-4702-9ced-591a2bfd8062/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 17:22:09,500 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be2d219d-1f53-4702-9ced-591a2bfd8062/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-12-02 17:22:09,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:22:09,876 INFO L262 TraceCheckSpWp]: Trace formula consists of 2052 conjuncts, 7 conjunts are in the unsatisfiable core [2023-12-02 17:22:09,889 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:22:09,947 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-12-02 17:22:09,947 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 17:22:09,948 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1474303235] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 17:22:09,948 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 17:22:09,948 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [21] total 23 [2023-12-02 17:22:09,948 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1182195977] [2023-12-02 17:22:09,948 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 17:22:09,949 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 17:22:09,949 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:22:09,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 17:22:09,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2023-12-02 17:22:09,950 INFO L87 Difference]: Start difference. First operand 8752 states and 13927 transitions. Second operand has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 2 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (20), 2 states have call predecessors, (20), 1 states have call successors, (20) [2023-12-02 17:22:10,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:22:10,723 INFO L93 Difference]: Finished difference Result 8992 states and 14355 transitions. [2023-12-02 17:22:10,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-02 17:22:10,724 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 2 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (20), 2 states have call predecessors, (20), 1 states have call successors, (20) Word has length 111 [2023-12-02 17:22:10,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:22:10,753 INFO L225 Difference]: With dead ends: 8992 [2023-12-02 17:22:10,753 INFO L226 Difference]: Without dead ends: 8977 [2023-12-02 17:22:10,756 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=86, Invalid=466, Unknown=0, NotChecked=0, Total=552 [2023-12-02 17:22:10,757 INFO L413 NwaCegarLoop]: 560 mSDtfsCounter, 47 mSDsluCounter, 1072 mSDsCounter, 0 mSdLazyCounter, 111 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 1632 SdHoareTripleChecker+Invalid, 123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 17:22:10,758 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 1632 Invalid, 123 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 111 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 17:22:10,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8977 states. [2023-12-02 17:22:11,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8977 to 8778. [2023-12-02 17:22:11,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8778 states, 6322 states have (on average 1.5491932932616261) internal successors, (9794), 6657 states have internal predecessors, (9794), 1885 states have call successors, (1885), 442 states have call predecessors, (1885), 570 states have return successors, (2268), 1790 states have call predecessors, (2268), 1880 states have call successors, (2268) [2023-12-02 17:22:11,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8778 states to 8778 states and 13947 transitions. [2023-12-02 17:22:11,665 INFO L78 Accepts]: Start accepts. Automaton has 8778 states and 13947 transitions. Word has length 111 [2023-12-02 17:22:11,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:22:11,666 INFO L495 AbstractCegarLoop]: Abstraction has 8778 states and 13947 transitions. [2023-12-02 17:22:11,666 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 2 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (20), 2 states have call predecessors, (20), 1 states have call successors, (20) [2023-12-02 17:22:11,666 INFO L276 IsEmpty]: Start isEmpty. Operand 8778 states and 13947 transitions. [2023-12-02 17:22:11,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2023-12-02 17:22:11,671 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:22:11,671 INFO L195 NwaCegarLoop]: trace histogram [7, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 17:22:11,684 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be2d219d-1f53-4702-9ced-591a2bfd8062/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-12-02 17:22:11,871 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be2d219d-1f53-4702-9ced-591a2bfd8062/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:22:11,872 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:22:11,872 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:22:11,872 INFO L85 PathProgramCache]: Analyzing trace with hash 1370002375, now seen corresponding path program 1 times [2023-12-02 17:22:11,872 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:22:11,872 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [807039664] [2023-12-02 17:22:11,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:22:11,873 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:22:11,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:22:12,592 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2023-12-02 17:22:12,592 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:22:12,592 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [807039664] [2023-12-02 17:22:12,592 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [807039664] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 17:22:12,592 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [189389694] [2023-12-02 17:22:12,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:22:12,593 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:22:12,593 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be2d219d-1f53-4702-9ced-591a2bfd8062/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 17:22:12,594 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be2d219d-1f53-4702-9ced-591a2bfd8062/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 17:22:12,594 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be2d219d-1f53-4702-9ced-591a2bfd8062/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-12-02 17:22:12,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:22:12,929 INFO L262 TraceCheckSpWp]: Trace formula consists of 2074 conjuncts, 27 conjunts are in the unsatisfiable core [2023-12-02 17:22:12,939 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:22:13,371 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 35 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-12-02 17:22:13,371 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 17:22:20,765 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2023-12-02 17:22:20,765 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [189389694] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 17:22:20,765 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1833819797] [2023-12-02 17:22:20,789 INFO L159 IcfgInterpreter]: Started Sifa with 108 locations of interest [2023-12-02 17:22:20,789 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 17:22:20,791 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 17:22:20,795 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 17:22:20,795 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 17:22:42,878 INFO L197 IcfgInterpreter]: Interpreting procedure cleanup with input of size 588 for LOIs [2023-12-02 17:23:56,964 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 588 for LOIs [2023-12-02 17:24:21,467 INFO L197 IcfgInterpreter]: Interpreting procedure areDoorsOpen with input of size 439 for LOIs [2023-12-02 17:24:21,818 INFO L197 IcfgInterpreter]: Interpreting procedure bigMacCall with input of size 593 for LOIs [2023-12-02 17:24:35,323 INFO L197 IcfgInterpreter]: Interpreting procedure isBlocked with input of size 497 for LOIs [2023-12-02 17:24:37,606 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift__wrappee__empty with input of size 572 for LOIs [2023-12-02 17:24:56,588 INFO L197 IcfgInterpreter]: Interpreting procedure stopRequestedInDirection with input of size 447 for LOIs [2023-12-02 17:25:04,932 INFO L197 IcfgInterpreter]: Interpreting procedure isFloorCalling with input of size 28 for LOIs [2023-12-02 17:25:04,961 INFO L197 IcfgInterpreter]: Interpreting procedure continueInDirection with input of size 455 for LOIs [2023-12-02 17:25:09,451 INFO L197 IcfgInterpreter]: Interpreting procedure isTopFloor with input of size 457 for LOIs [2023-12-02 17:25:10,749 INFO L197 IcfgInterpreter]: Interpreting procedure angelinaCall with input of size 556 for LOIs [2023-12-02 17:25:22,366 INFO L197 IcfgInterpreter]: Interpreting procedure initPersonOnFloor with input of size 648 for LOIs [2023-12-02 17:25:27,490 INFO L197 IcfgInterpreter]: Interpreting procedure getOrigin with input of size 525 for LOIs [2023-12-02 17:25:29,167 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 17:25:38,226 WARN L293 SmtUtils]: Spent 5.02s on a formula simplification that was a NOOP. DAG size: 593 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 17:25:50,265 WARN L293 SmtUtils]: Spent 7.08s on a formula simplification. DAG size of input: 569 DAG size of output: 535 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 17:26:15,195 WARN L293 SmtUtils]: Spent 14.10s on a formula simplification. DAG size of input: 648 DAG size of output: 608 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 17:27:30,212 WARN L293 SmtUtils]: Spent 5.21s on a formula simplification. DAG size of input: 457 DAG size of output: 443 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 17:27:36,193 WARN L293 SmtUtils]: Spent 5.48s on a formula simplification. DAG size of input: 469 DAG size of output: 449 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 17:28:29,815 WARN L293 SmtUtils]: Spent 10.49s on a formula simplification. DAG size of input: 633 DAG size of output: 626 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 17:28:38,093 WARN L293 SmtUtils]: Spent 7.56s on a formula simplification. DAG size of input: 516 DAG size of output: 512 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 17:28:46,618 WARN L293 SmtUtils]: Spent 7.79s on a formula simplification. DAG size of input: 525 DAG size of output: 521 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 17:28:55,287 WARN L293 SmtUtils]: Spent 7.92s on a formula simplification. DAG size of input: 527 DAG size of output: 523 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 17:29:04,627 WARN L293 SmtUtils]: Spent 8.32s on a formula simplification. DAG size of input: 529 DAG size of output: 525 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 17:29:14,048 WARN L293 SmtUtils]: Spent 8.52s on a formula simplification. DAG size of input: 531 DAG size of output: 527 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 17:29:22,932 WARN L293 SmtUtils]: Spent 8.01s on a formula simplification. DAG size of input: 533 DAG size of output: 506 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 17:29:31,720 WARN L293 SmtUtils]: Spent 7.86s on a formula simplification. DAG size of input: 535 DAG size of output: 508 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 17:29:40,202 WARN L293 SmtUtils]: Spent 7.70s on a formula simplification. DAG size of input: 531 DAG size of output: 504 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 17:29:49,432 WARN L293 SmtUtils]: Spent 8.38s on a formula simplification. DAG size of input: 535 DAG size of output: 508 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 17:29:58,665 WARN L293 SmtUtils]: Spent 8.23s on a formula simplification. DAG size of input: 537 DAG size of output: 510 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 17:30:07,804 WARN L293 SmtUtils]: Spent 8.20s on a formula simplification. DAG size of input: 539 DAG size of output: 512 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 17:30:16,598 WARN L293 SmtUtils]: Spent 7.99s on a formula simplification. DAG size of input: 497 DAG size of output: 470 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 17:30:25,465 WARN L293 SmtUtils]: Spent 8.07s on a formula simplification. DAG size of input: 501 DAG size of output: 474 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 17:30:34,551 WARN L293 SmtUtils]: Spent 8.12s on a formula simplification. DAG size of input: 541 DAG size of output: 514 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 17:30:43,910 WARN L293 SmtUtils]: Spent 8.41s on a formula simplification. DAG size of input: 541 DAG size of output: 514 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 17:30:53,405 WARN L293 SmtUtils]: Spent 8.44s on a formula simplification. DAG size of input: 544 DAG size of output: 517 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 17:31:02,819 WARN L293 SmtUtils]: Spent 8.43s on a formula simplification. DAG size of input: 547 DAG size of output: 520 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 17:31:12,063 WARN L293 SmtUtils]: Spent 8.21s on a formula simplification. DAG size of input: 545 DAG size of output: 518 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 17:31:22,061 WARN L293 SmtUtils]: Spent 8.77s on a formula simplification. DAG size of input: 550 DAG size of output: 520 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 17:31:31,814 WARN L293 SmtUtils]: Spent 8.60s on a formula simplification. DAG size of input: 550 DAG size of output: 520 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 17:31:31,818 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [1833819797] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 17:31:31,819 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2023-12-02 17:31:31,819 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [64] imperfect sequences [16, 9, 11] total 88 [2023-12-02 17:31:31,819 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [708980926] [2023-12-02 17:31:31,820 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 17:31:31,820 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2023-12-02 17:31:31,820 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:31:31,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2023-12-02 17:31:31,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=641, Invalid=7015, Unknown=0, NotChecked=0, Total=7656 [2023-12-02 17:31:31,825 INFO L87 Difference]: Start difference. First operand 8778 states and 13947 transitions. Second operand has 64 states, 52 states have (on average 1.3653846153846154) internal successors, (71), 41 states have internal predecessors, (71), 19 states have call successors, (23), 13 states have call predecessors, (23), 13 states have return successors, (22), 19 states have call predecessors, (22), 19 states have call successors, (22) [2023-12-02 17:31:37,921 WARN L293 SmtUtils]: Spent 5.30s on a formula simplification. DAG size of input: 602 DAG size of output: 595 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 17:31:43,899 WARN L293 SmtUtils]: Spent 5.61s on a formula simplification. DAG size of input: 615 DAG size of output: 601 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 17:31:49,758 WARN L293 SmtUtils]: Spent 5.27s on a formula simplification. DAG size of input: 645 DAG size of output: 597 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 17:33:09,787 WARN L293 SmtUtils]: Spent 5.48s on a formula simplification that was a NOOP. DAG size: 473 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 17:33:15,564 WARN L293 SmtUtils]: Spent 5.45s on a formula simplification that was a NOOP. DAG size: 486 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 17:34:18,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:34:18,972 INFO L93 Difference]: Finished difference Result 18326 states and 29123 transitions. [2023-12-02 17:34:18,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2023-12-02 17:34:18,973 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 52 states have (on average 1.3653846153846154) internal successors, (71), 41 states have internal predecessors, (71), 19 states have call successors, (23), 13 states have call predecessors, (23), 13 states have return successors, (22), 19 states have call predecessors, (22), 19 states have call successors, (22) Word has length 125 [2023-12-02 17:34:18,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:34:19,006 INFO L225 Difference]: With dead ends: 18326 [2023-12-02 17:34:19,007 INFO L226 Difference]: Without dead ends: 9577 [2023-12-02 17:34:19,034 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 405 GetRequests, 306 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3446 ImplicationChecksByTransitivity, 428.0s TimeCoverageRelationStatistics Valid=779, Invalid=9321, Unknown=0, NotChecked=0, Total=10100 [2023-12-02 17:34:19,034 INFO L413 NwaCegarLoop]: 549 mSDtfsCounter, 528 mSDsluCounter, 6960 mSDsCounter, 0 mSdLazyCounter, 19483 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 96.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 545 SdHoareTripleChecker+Valid, 7509 SdHoareTripleChecker+Invalid, 19581 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 19483 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 100.1s IncrementalHoareTripleChecker+Time [2023-12-02 17:34:19,035 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [545 Valid, 7509 Invalid, 19581 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [98 Valid, 19483 Invalid, 0 Unknown, 0 Unchecked, 100.1s Time] [2023-12-02 17:34:19,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9577 states. [2023-12-02 17:34:20,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9577 to 9464. [2023-12-02 17:34:20,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9464 states, 6864 states have (on average 1.5461829836829837) internal successors, (10613), 7209 states have internal predecessors, (10613), 1982 states have call successors, (1982), 485 states have call predecessors, (1982), 617 states have return successors, (2388), 1881 states have call predecessors, (2388), 1977 states have call successors, (2388) [2023-12-02 17:34:20,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9464 states to 9464 states and 14983 transitions. [2023-12-02 17:34:20,345 INFO L78 Accepts]: Start accepts. Automaton has 9464 states and 14983 transitions. Word has length 125 [2023-12-02 17:34:20,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:34:20,346 INFO L495 AbstractCegarLoop]: Abstraction has 9464 states and 14983 transitions. [2023-12-02 17:34:20,346 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 52 states have (on average 1.3653846153846154) internal successors, (71), 41 states have internal predecessors, (71), 19 states have call successors, (23), 13 states have call predecessors, (23), 13 states have return successors, (22), 19 states have call predecessors, (22), 19 states have call successors, (22) [2023-12-02 17:34:20,346 INFO L276 IsEmpty]: Start isEmpty. Operand 9464 states and 14983 transitions. [2023-12-02 17:34:20,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2023-12-02 17:34:20,350 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:34:20,350 INFO L195 NwaCegarLoop]: trace histogram [7, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 17:34:20,357 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be2d219d-1f53-4702-9ced-591a2bfd8062/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-12-02 17:34:20,550 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be2d219d-1f53-4702-9ced-591a2bfd8062/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-12-02 17:34:20,550 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:34:20,551 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:34:20,551 INFO L85 PathProgramCache]: Analyzing trace with hash 461098915, now seen corresponding path program 1 times [2023-12-02 17:34:20,551 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:34:20,551 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1018984499] [2023-12-02 17:34:20,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:34:20,551 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:34:20,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:34:20,943 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2023-12-02 17:34:20,943 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:34:20,943 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1018984499] [2023-12-02 17:34:20,944 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1018984499] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 17:34:20,944 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 17:34:20,944 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-12-02 17:34:20,944 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [719188124] [2023-12-02 17:34:20,944 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 17:34:20,945 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-12-02 17:34:20,945 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:34:20,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-12-02 17:34:20,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2023-12-02 17:34:20,945 INFO L87 Difference]: Start difference. First operand 9464 states and 14983 transitions. Second operand has 9 states, 8 states have (on average 8.875) internal successors, (71), 8 states have internal predecessors, (71), 6 states have call successors, (24), 3 states have call predecessors, (24), 4 states have return successors, (23), 7 states have call predecessors, (23), 5 states have call successors, (23) [2023-12-02 17:34:24,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:34:24,148 INFO L93 Difference]: Finished difference Result 18602 states and 29818 transitions. [2023-12-02 17:34:24,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-12-02 17:34:24,148 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 8.875) internal successors, (71), 8 states have internal predecessors, (71), 6 states have call successors, (24), 3 states have call predecessors, (24), 4 states have return successors, (23), 7 states have call predecessors, (23), 5 states have call successors, (23) Word has length 127 [2023-12-02 17:34:24,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:34:24,175 INFO L225 Difference]: With dead ends: 18602 [2023-12-02 17:34:24,175 INFO L226 Difference]: Without dead ends: 10873 [2023-12-02 17:34:24,189 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2023-12-02 17:34:24,189 INFO L413 NwaCegarLoop]: 412 mSDtfsCounter, 1019 mSDsluCounter, 1782 mSDsCounter, 0 mSdLazyCounter, 3261 mSolverCounterSat, 350 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1106 SdHoareTripleChecker+Valid, 2194 SdHoareTripleChecker+Invalid, 3611 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 350 IncrementalHoareTripleChecker+Valid, 3261 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2023-12-02 17:34:24,189 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1106 Valid, 2194 Invalid, 3611 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [350 Valid, 3261 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2023-12-02 17:34:24,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10873 states. [2023-12-02 17:34:25,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10873 to 9464. [2023-12-02 17:34:25,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9464 states, 6864 states have (on average 1.5461829836829837) internal successors, (10613), 7209 states have internal predecessors, (10613), 1982 states have call successors, (1982), 485 states have call predecessors, (1982), 617 states have return successors, (2388), 1881 states have call predecessors, (2388), 1977 states have call successors, (2388) [2023-12-02 17:34:25,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9464 states to 9464 states and 14983 transitions. [2023-12-02 17:34:25,374 INFO L78 Accepts]: Start accepts. Automaton has 9464 states and 14983 transitions. Word has length 127 [2023-12-02 17:34:25,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:34:25,374 INFO L495 AbstractCegarLoop]: Abstraction has 9464 states and 14983 transitions. [2023-12-02 17:34:25,374 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 8.875) internal successors, (71), 8 states have internal predecessors, (71), 6 states have call successors, (24), 3 states have call predecessors, (24), 4 states have return successors, (23), 7 states have call predecessors, (23), 5 states have call successors, (23) [2023-12-02 17:34:25,374 INFO L276 IsEmpty]: Start isEmpty. Operand 9464 states and 14983 transitions. [2023-12-02 17:34:25,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2023-12-02 17:34:25,377 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:34:25,377 INFO L195 NwaCegarLoop]: trace histogram [7, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 17:34:25,377 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-12-02 17:34:25,377 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:34:25,377 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:34:25,377 INFO L85 PathProgramCache]: Analyzing trace with hash 1374815083, now seen corresponding path program 1 times [2023-12-02 17:34:25,378 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:34:25,378 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1088373489] [2023-12-02 17:34:25,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:34:25,378 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:34:25,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:34:25,463 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2023-12-02 17:34:25,463 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:34:25,463 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1088373489] [2023-12-02 17:34:25,463 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1088373489] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 17:34:25,463 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 17:34:25,463 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 17:34:25,463 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1616183005] [2023-12-02 17:34:25,463 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 17:34:25,464 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 17:34:25,464 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:34:25,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 17:34:25,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 17:34:25,465 INFO L87 Difference]: Start difference. First operand 9464 states and 14983 transitions. Second operand has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 3 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (22), 2 states have call predecessors, (22), 2 states have call successors, (22) [2023-12-02 17:34:27,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:34:27,532 INFO L93 Difference]: Finished difference Result 26780 states and 42766 transitions. [2023-12-02 17:34:27,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 17:34:27,532 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 3 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (22), 2 states have call predecessors, (22), 2 states have call successors, (22) Word has length 126 [2023-12-02 17:34:27,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:34:27,583 INFO L225 Difference]: With dead ends: 26780 [2023-12-02 17:34:27,583 INFO L226 Difference]: Without dead ends: 18046 [2023-12-02 17:34:27,602 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 17:34:27,603 INFO L413 NwaCegarLoop]: 999 mSDtfsCounter, 497 mSDsluCounter, 505 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 497 SdHoareTripleChecker+Valid, 1504 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 17:34:27,603 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [497 Valid, 1504 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 17:34:27,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18046 states. [2023-12-02 17:34:29,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18046 to 18044. [2023-12-02 17:34:29,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18044 states, 13063 states have (on average 1.5443619382990126) internal successors, (20174), 13740 states have internal predecessors, (20174), 3798 states have call successors, (3798), 918 states have call predecessors, (3798), 1182 states have return successors, (4718), 3609 states have call predecessors, (4718), 3793 states have call successors, (4718) [2023-12-02 17:34:29,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18044 states to 18044 states and 28690 transitions. [2023-12-02 17:34:29,564 INFO L78 Accepts]: Start accepts. Automaton has 18044 states and 28690 transitions. Word has length 126 [2023-12-02 17:34:29,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:34:29,564 INFO L495 AbstractCegarLoop]: Abstraction has 18044 states and 28690 transitions. [2023-12-02 17:34:29,565 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 3 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (22), 2 states have call predecessors, (22), 2 states have call successors, (22) [2023-12-02 17:34:29,565 INFO L276 IsEmpty]: Start isEmpty. Operand 18044 states and 28690 transitions. [2023-12-02 17:34:29,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2023-12-02 17:34:29,568 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:34:29,568 INFO L195 NwaCegarLoop]: trace histogram [7, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 17:34:29,568 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-12-02 17:34:29,568 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:34:29,568 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:34:29,568 INFO L85 PathProgramCache]: Analyzing trace with hash -1615303445, now seen corresponding path program 1 times [2023-12-02 17:34:29,568 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:34:29,569 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2083459877] [2023-12-02 17:34:29,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:34:29,569 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:34:29,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:34:30,281 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2023-12-02 17:34:30,281 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:34:30,281 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2083459877] [2023-12-02 17:34:30,281 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2083459877] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 17:34:30,281 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [564567941] [2023-12-02 17:34:30,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:34:30,281 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:34:30,282 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be2d219d-1f53-4702-9ced-591a2bfd8062/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 17:34:30,282 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be2d219d-1f53-4702-9ced-591a2bfd8062/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 17:34:30,283 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be2d219d-1f53-4702-9ced-591a2bfd8062/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-12-02 17:34:30,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:34:30,605 INFO L262 TraceCheckSpWp]: Trace formula consists of 2077 conjuncts, 27 conjunts are in the unsatisfiable core [2023-12-02 17:34:30,610 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:34:30,899 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 35 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-12-02 17:34:30,899 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 17:34:39,425 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2023-12-02 17:34:39,426 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [564567941] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 17:34:39,426 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1886991057] [2023-12-02 17:34:39,431 INFO L159 IcfgInterpreter]: Started Sifa with 109 locations of interest [2023-12-02 17:34:39,431 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 17:34:39,432 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 17:34:39,432 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 17:34:39,432 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 17:34:59,898 INFO L197 IcfgInterpreter]: Interpreting procedure cleanup with input of size 588 for LOIs