./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/elevator_spec2_product31.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_241524ac-965a-42a3-ac5e-7ff0e23e7189/bin/utaipan-verify-nQ1chXbOIh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_241524ac-965a-42a3-ac5e-7ff0e23e7189/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_241524ac-965a-42a3-ac5e-7ff0e23e7189/bin/utaipan-verify-nQ1chXbOIh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_241524ac-965a-42a3-ac5e-7ff0e23e7189/bin/utaipan-verify-nQ1chXbOIh/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec2_product31.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_241524ac-965a-42a3-ac5e-7ff0e23e7189/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_241524ac-965a-42a3-ac5e-7ff0e23e7189/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 a8dba55a6053d72f9111ac5cd147f9f45da0f79494b1facfa57c6480910007fb --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-12-02 16:40:14,921 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-02 16:40:14,992 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_241524ac-965a-42a3-ac5e-7ff0e23e7189/bin/utaipan-verify-nQ1chXbOIh/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-12-02 16:40:14,997 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-02 16:40:14,997 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-12-02 16:40:15,022 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-02 16:40:15,023 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-12-02 16:40:15,024 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-12-02 16:40:15,024 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-02 16:40:15,025 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-02 16:40:15,025 INFO L153 SettingsManager]: * User list type=DISABLED [2023-12-02 16:40:15,026 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-12-02 16:40:15,027 INFO L153 SettingsManager]: * Explicit value domain=true [2023-12-02 16:40:15,027 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-12-02 16:40:15,028 INFO L153 SettingsManager]: * Octagon Domain=false [2023-12-02 16:40:15,028 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-12-02 16:40:15,029 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-12-02 16:40:15,029 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-12-02 16:40:15,030 INFO L153 SettingsManager]: * Interval Domain=false [2023-12-02 16:40:15,031 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-12-02 16:40:15,031 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-12-02 16:40:15,032 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-12-02 16:40:15,033 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-02 16:40:15,033 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-12-02 16:40:15,034 INFO L153 SettingsManager]: * sizeof long=4 [2023-12-02 16:40:15,034 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-02 16:40:15,035 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-12-02 16:40:15,035 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-02 16:40:15,036 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-12-02 16:40:15,036 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-02 16:40:15,036 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-12-02 16:40:15,037 INFO L153 SettingsManager]: * sizeof long double=12 [2023-12-02 16:40:15,037 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-12-02 16:40:15,037 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-02 16:40:15,038 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-02 16:40:15,038 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-12-02 16:40:15,038 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-02 16:40:15,038 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 16:40:15,039 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-02 16:40:15,039 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-02 16:40:15,039 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-12-02 16:40:15,040 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-12-02 16:40:15,040 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-12-02 16:40:15,040 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-02 16:40:15,040 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-12-02 16:40:15,040 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-12-02 16:40:15,040 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-12-02 16:40:15,041 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_241524ac-965a-42a3-ac5e-7ff0e23e7189/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_241524ac-965a-42a3-ac5e-7ff0e23e7189/bin/utaipan-verify-nQ1chXbOIh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a8dba55a6053d72f9111ac5cd147f9f45da0f79494b1facfa57c6480910007fb [2023-12-02 16:40:15,252 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-02 16:40:15,274 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-02 16:40:15,276 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-02 16:40:15,278 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-02 16:40:15,278 INFO L274 PluginConnector]: CDTParser initialized [2023-12-02 16:40:15,280 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_241524ac-965a-42a3-ac5e-7ff0e23e7189/bin/utaipan-verify-nQ1chXbOIh/../../sv-benchmarks/c/product-lines/elevator_spec2_product31.cil.c [2023-12-02 16:40:18,138 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-02 16:40:18,434 INFO L384 CDTParser]: Found 1 translation units. [2023-12-02 16:40:18,435 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_241524ac-965a-42a3-ac5e-7ff0e23e7189/sv-benchmarks/c/product-lines/elevator_spec2_product31.cil.c [2023-12-02 16:40:18,460 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_241524ac-965a-42a3-ac5e-7ff0e23e7189/bin/utaipan-verify-nQ1chXbOIh/data/c5993096a/fece13b567c44f66bcd24a2c4a73c025/FLAG46cb8c1b2 [2023-12-02 16:40:18,476 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_241524ac-965a-42a3-ac5e-7ff0e23e7189/bin/utaipan-verify-nQ1chXbOIh/data/c5993096a/fece13b567c44f66bcd24a2c4a73c025 [2023-12-02 16:40:18,479 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-02 16:40:18,480 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-12-02 16:40:18,482 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-02 16:40:18,482 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-02 16:40:18,488 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-02 16:40:18,488 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 04:40:18" (1/1) ... [2023-12-02 16:40:18,490 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2f4cc3b5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:40:18, skipping insertion in model container [2023-12-02 16:40:18,490 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 04:40:18" (1/1) ... [2023-12-02 16:40:18,572 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-02 16:40:18,997 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_241524ac-965a-42a3-ac5e-7ff0e23e7189/sv-benchmarks/c/product-lines/elevator_spec2_product31.cil.c[64450,64463] [2023-12-02 16:40:19,038 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 16:40:19,052 INFO L202 MainTranslator]: Completed pre-run [2023-12-02 16:40:19,063 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Floor.i","") [48] [2023-12-02 16:40:19,064 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Person.i","") [716] [2023-12-02 16:40:19,065 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Specification2_spec.i","") [837] [2023-12-02 16:40:19,065 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"UnitTests.i","") [1024] [2023-12-02 16:40:19,065 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Test.i","") [1121] [2023-12-02 16:40:19,065 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Elevator.i","") [1476] [2023-12-02 16:40:19,066 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"featureselect.i","") [3091] [2023-12-02 16:40:19,066 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"wsllib_check.i","") [3126] [2023-12-02 16:40:19,066 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"libacc.i","") [3135] [2023-12-02 16:40:19,066 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"scenario.i","") [3501] [2023-12-02 16:40:19,168 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_241524ac-965a-42a3-ac5e-7ff0e23e7189/sv-benchmarks/c/product-lines/elevator_spec2_product31.cil.c[64450,64463] [2023-12-02 16:40:19,183 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 16:40:19,211 INFO L206 MainTranslator]: Completed translation [2023-12-02 16:40:19,212 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:40:19 WrapperNode [2023-12-02 16:40:19,212 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-02 16:40:19,213 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-02 16:40:19,213 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-02 16:40:19,213 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-02 16:40:19,218 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:40:19" (1/1) ... [2023-12-02 16:40:19,249 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:40:19" (1/1) ... [2023-12-02 16:40:19,296 INFO L138 Inliner]: procedures = 97, calls = 349, calls flagged for inlining = 28, calls inlined = 25, statements flattened = 965 [2023-12-02 16:40:19,296 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-02 16:40:19,297 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-02 16:40:19,297 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-02 16:40:19,297 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-02 16:40:19,306 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:40:19" (1/1) ... [2023-12-02 16:40:19,306 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:40:19" (1/1) ... [2023-12-02 16:40:19,313 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:40:19" (1/1) ... [2023-12-02 16:40:19,313 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:40:19" (1/1) ... [2023-12-02 16:40:19,338 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:40:19" (1/1) ... [2023-12-02 16:40:19,353 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:40:19" (1/1) ... [2023-12-02 16:40:19,359 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:40:19" (1/1) ... [2023-12-02 16:40:19,366 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:40:19" (1/1) ... [2023-12-02 16:40:19,377 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-02 16:40:19,378 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-02 16:40:19,378 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-02 16:40:19,378 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-02 16:40:19,379 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:40:19" (1/1) ... [2023-12-02 16:40:19,386 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 16:40:19,399 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_241524ac-965a-42a3-ac5e-7ff0e23e7189/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 16:40:19,413 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_241524ac-965a-42a3-ac5e-7ff0e23e7189/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-12-02 16:40:19,416 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_241524ac-965a-42a3-ac5e-7ff0e23e7189/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-12-02 16:40:19,448 INFO L130 BoogieDeclarations]: Found specification of procedure bigMacCall [2023-12-02 16:40:19,448 INFO L138 BoogieDeclarations]: Found implementation of procedure bigMacCall [2023-12-02 16:40:19,448 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2023-12-02 16:40:19,448 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2023-12-02 16:40:19,448 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2023-12-02 16:40:19,449 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2023-12-02 16:40:19,449 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection__wrappee__empty [2023-12-02 16:40:19,449 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection__wrappee__empty [2023-12-02 16:40:19,449 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2023-12-02 16:40:19,449 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2023-12-02 16:40:19,449 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2023-12-02 16:40:19,449 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2023-12-02 16:40:19,449 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2023-12-02 16:40:19,450 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2023-12-02 16:40:19,450 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2023-12-02 16:40:19,450 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2023-12-02 16:40:19,450 INFO L130 BoogieDeclarations]: Found specification of procedure buttonForFloorIsPressed [2023-12-02 16:40:19,450 INFO L138 BoogieDeclarations]: Found implementation of procedure buttonForFloorIsPressed [2023-12-02 16:40:19,450 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2023-12-02 16:40:19,450 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2023-12-02 16:40:19,451 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2023-12-02 16:40:19,451 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2023-12-02 16:40:19,451 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-02 16:40:19,451 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor__wrappee__twothirdsfull [2023-12-02 16:40:19,451 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor__wrappee__twothirdsfull [2023-12-02 16:40:19,451 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2023-12-02 16:40:19,451 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2023-12-02 16:40:19,451 INFO L130 BoogieDeclarations]: Found specification of procedure isExecutiveFloorCalling [2023-12-02 16:40:19,452 INFO L138 BoogieDeclarations]: Found implementation of procedure isExecutiveFloorCalling [2023-12-02 16:40:19,452 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2023-12-02 16:40:19,452 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2023-12-02 16:40:19,452 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2023-12-02 16:40:19,452 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2023-12-02 16:40:19,452 INFO L130 BoogieDeclarations]: Found specification of procedure areDoorsOpen [2023-12-02 16:40:19,452 INFO L138 BoogieDeclarations]: Found implementation of procedure areDoorsOpen [2023-12-02 16:40:19,452 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2023-12-02 16:40:19,453 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2023-12-02 16:40:19,453 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2023-12-02 16:40:19,453 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2023-12-02 16:40:19,453 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2023-12-02 16:40:19,453 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2023-12-02 16:40:19,453 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2023-12-02 16:40:19,453 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2023-12-02 16:40:19,454 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2023-12-02 16:40:19,454 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2023-12-02 16:40:19,454 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2023-12-02 16:40:19,454 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2023-12-02 16:40:19,454 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2023-12-02 16:40:19,454 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2023-12-02 16:40:19,454 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-12-02 16:40:19,454 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2023-12-02 16:40:19,455 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2023-12-02 16:40:19,455 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-02 16:40:19,455 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-02 16:40:19,455 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2023-12-02 16:40:19,455 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2023-12-02 16:40:19,608 INFO L241 CfgBuilder]: Building ICFG [2023-12-02 16:40:19,610 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-02 16:40:20,639 INFO L282 CfgBuilder]: Performing block encoding [2023-12-02 16:40:21,424 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-02 16:40:21,424 INFO L309 CfgBuilder]: Removed 1 assume(true) statements. [2023-12-02 16:40:21,426 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 04:40:21 BoogieIcfgContainer [2023-12-02 16:40:21,426 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-02 16:40:21,429 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-02 16:40:21,429 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-02 16:40:21,431 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-02 16:40:21,432 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.12 04:40:18" (1/3) ... [2023-12-02 16:40:21,432 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5a31ce7c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 04:40:21, skipping insertion in model container [2023-12-02 16:40:21,432 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:40:19" (2/3) ... [2023-12-02 16:40:21,433 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5a31ce7c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 04:40:21, skipping insertion in model container [2023-12-02 16:40:21,433 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 04:40:21" (3/3) ... [2023-12-02 16:40:21,434 INFO L112 eAbstractionObserver]: Analyzing ICFG elevator_spec2_product31.cil.c [2023-12-02 16:40:21,448 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-02 16:40:21,449 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-12-02 16:40:21,502 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-02 16:40:21,507 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;@45758eb1, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-02 16:40:21,508 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-12-02 16:40:21,514 INFO L276 IsEmpty]: Start isEmpty. Operand has 397 states, 267 states have (on average 1.5767790262172285) internal successors, (421), 288 states have internal predecessors, (421), 102 states have call successors, (102), 26 states have call predecessors, (102), 26 states have return successors, (102), 96 states have call predecessors, (102), 102 states have call successors, (102) [2023-12-02 16:40:21,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2023-12-02 16:40:21,538 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:40:21,538 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] [2023-12-02 16:40:21,539 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 16:40:21,544 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:40:21,544 INFO L85 PathProgramCache]: Analyzing trace with hash 672001314, now seen corresponding path program 1 times [2023-12-02 16:40:21,551 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 16:40:21,551 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [628445964] [2023-12-02 16:40:21,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:40:21,552 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 16:40:21,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:40:21,959 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 16:40:21,959 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 16:40:21,960 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [628445964] [2023-12-02 16:40:21,960 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [628445964] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 16:40:21,960 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 16:40:21,961 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-02 16:40:21,962 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1363711869] [2023-12-02 16:40:21,963 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 16:40:21,967 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-12-02 16:40:21,967 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 16:40:21,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-12-02 16:40:21,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-12-02 16:40:22,001 INFO L87 Difference]: Start difference. First operand has 397 states, 267 states have (on average 1.5767790262172285) internal successors, (421), 288 states have internal predecessors, (421), 102 states have call successors, (102), 26 states have call predecessors, (102), 26 states have return successors, (102), 96 states have call predecessors, (102), 102 states have call successors, (102) Second operand has 2 states, 2 states have (on average 21.5) internal successors, (43), 2 states have internal predecessors, (43), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 1 states have call successors, (13) [2023-12-02 16:40:22,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:40:22,145 INFO L93 Difference]: Finished difference Result 415 states and 652 transitions. [2023-12-02 16:40:22,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-12-02 16:40:22,148 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 21.5) internal successors, (43), 2 states have internal predecessors, (43), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 1 states have call successors, (13) Word has length 77 [2023-12-02 16:40:22,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:40:22,164 INFO L225 Difference]: With dead ends: 415 [2023-12-02 16:40:22,165 INFO L226 Difference]: Without dead ends: 393 [2023-12-02 16:40:22,168 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 16:40:22,172 INFO L413 NwaCegarLoop]: 580 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 580 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 16:40:22,173 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 580 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 16:40:22,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 393 states. [2023-12-02 16:40:22,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 393 to 393. [2023-12-02 16:40:22,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 393 states, 265 states have (on average 1.5660377358490567) internal successors, (415), 284 states have internal predecessors, (415), 102 states have call successors, (102), 26 states have call predecessors, (102), 25 states have return successors, (97), 95 states have call predecessors, (97), 97 states have call successors, (97) [2023-12-02 16:40:22,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 393 states to 393 states and 614 transitions. [2023-12-02 16:40:22,250 INFO L78 Accepts]: Start accepts. Automaton has 393 states and 614 transitions. Word has length 77 [2023-12-02 16:40:22,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:40:22,252 INFO L495 AbstractCegarLoop]: Abstraction has 393 states and 614 transitions. [2023-12-02 16:40:22,252 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 21.5) internal successors, (43), 2 states have internal predecessors, (43), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 1 states have call successors, (13) [2023-12-02 16:40:22,252 INFO L276 IsEmpty]: Start isEmpty. Operand 393 states and 614 transitions. [2023-12-02 16:40:22,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2023-12-02 16:40:22,259 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:40:22,259 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] [2023-12-02 16:40:22,259 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-12-02 16:40:22,259 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 16:40:22,260 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:40:22,260 INFO L85 PathProgramCache]: Analyzing trace with hash -1955866558, now seen corresponding path program 1 times [2023-12-02 16:40:22,260 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 16:40:22,261 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1873482520] [2023-12-02 16:40:22,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:40:22,261 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 16:40:22,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:40:22,694 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 16:40:22,695 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 16:40:22,695 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1873482520] [2023-12-02 16:40:22,695 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1873482520] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 16:40:22,696 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 16:40:22,696 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-12-02 16:40:22,696 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [534836202] [2023-12-02 16:40:22,697 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 16:40:22,698 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-02 16:40:22,698 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 16:40:22,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-02 16:40:22,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-12-02 16:40:22,700 INFO L87 Difference]: Start difference. First operand 393 states and 614 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 16:40:25,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:40:25,025 INFO L93 Difference]: Finished difference Result 1210 states and 1921 transitions. [2023-12-02 16:40:25,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-12-02 16:40:25,026 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 78 [2023-12-02 16:40:25,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:40:25,034 INFO L225 Difference]: With dead ends: 1210 [2023-12-02 16:40:25,034 INFO L226 Difference]: Without dead ends: 833 [2023-12-02 16:40:25,039 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2023-12-02 16:40:25,041 INFO L413 NwaCegarLoop]: 374 mSDtfsCounter, 1209 mSDsluCounter, 1229 mSDsCounter, 0 mSdLazyCounter, 2335 mSolverCounterSat, 448 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1292 SdHoareTripleChecker+Valid, 1603 SdHoareTripleChecker+Invalid, 2783 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 448 IncrementalHoareTripleChecker+Valid, 2335 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2023-12-02 16:40:25,041 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1292 Valid, 1603 Invalid, 2783 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [448 Valid, 2335 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2023-12-02 16:40:25,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 833 states. [2023-12-02 16:40:25,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 833 to 784. [2023-12-02 16:40:25,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 784 states, 537 states have (on average 1.5772811918063314) internal successors, (847), 570 states have internal predecessors, (847), 198 states have call successors, (198), 48 states have call predecessors, (198), 48 states have return successors, (199), 190 states have call predecessors, (199), 193 states have call successors, (199) [2023-12-02 16:40:25,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 784 states to 784 states and 1244 transitions. [2023-12-02 16:40:25,123 INFO L78 Accepts]: Start accepts. Automaton has 784 states and 1244 transitions. Word has length 78 [2023-12-02 16:40:25,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:40:25,124 INFO L495 AbstractCegarLoop]: Abstraction has 784 states and 1244 transitions. [2023-12-02 16:40:25,124 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 16:40:25,124 INFO L276 IsEmpty]: Start isEmpty. Operand 784 states and 1244 transitions. [2023-12-02 16:40:25,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2023-12-02 16:40:25,128 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:40:25,128 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] [2023-12-02 16:40:25,128 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-12-02 16:40:25,128 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 16:40:25,129 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:40:25,129 INFO L85 PathProgramCache]: Analyzing trace with hash -606004096, now seen corresponding path program 1 times [2023-12-02 16:40:25,129 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 16:40:25,129 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [428872578] [2023-12-02 16:40:25,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:40:25,130 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 16:40:25,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:40:25,446 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 16:40:25,447 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 16:40:25,447 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [428872578] [2023-12-02 16:40:25,447 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [428872578] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 16:40:25,447 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 16:40:25,448 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-12-02 16:40:25,448 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [814486515] [2023-12-02 16:40:25,448 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 16:40:25,448 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-02 16:40:25,449 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 16:40:25,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-02 16:40:25,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-12-02 16:40:25,450 INFO L87 Difference]: Start difference. First operand 784 states and 1244 transitions. Second operand has 6 states, 6 states have (on average 7.666666666666667) internal successors, (46), 6 states have internal predecessors, (46), 3 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 3 states have call predecessors, (14), 2 states have call successors, (14) [2023-12-02 16:40:25,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:40:25,990 INFO L93 Difference]: Finished difference Result 855 states and 1356 transitions. [2023-12-02 16:40:25,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-02 16:40:25,991 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.666666666666667) internal successors, (46), 6 states have internal predecessors, (46), 3 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 3 states have call predecessors, (14), 2 states have call successors, (14) Word has length 82 [2023-12-02 16:40:25,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:40:26,001 INFO L225 Difference]: With dead ends: 855 [2023-12-02 16:40:26,001 INFO L226 Difference]: Without dead ends: 840 [2023-12-02 16:40:26,003 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 16:40:26,004 INFO L413 NwaCegarLoop]: 569 mSDtfsCounter, 707 mSDsluCounter, 950 mSDsCounter, 0 mSdLazyCounter, 323 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 708 SdHoareTripleChecker+Valid, 1519 SdHoareTripleChecker+Invalid, 345 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 323 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-02 16:40:26,005 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [708 Valid, 1519 Invalid, 345 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 323 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-02 16:40:26,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 840 states. [2023-12-02 16:40:26,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 840 to 788. [2023-12-02 16:40:26,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 788 states, 541 states have (on average 1.5730129390018484) internal successors, (851), 574 states have internal predecessors, (851), 198 states have call successors, (198), 48 states have call predecessors, (198), 48 states have return successors, (199), 190 states have call predecessors, (199), 193 states have call successors, (199) [2023-12-02 16:40:26,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 788 states to 788 states and 1248 transitions. [2023-12-02 16:40:26,086 INFO L78 Accepts]: Start accepts. Automaton has 788 states and 1248 transitions. Word has length 82 [2023-12-02 16:40:26,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:40:26,087 INFO L495 AbstractCegarLoop]: Abstraction has 788 states and 1248 transitions. [2023-12-02 16:40:26,087 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.666666666666667) internal successors, (46), 6 states have internal predecessors, (46), 3 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 3 states have call predecessors, (14), 2 states have call successors, (14) [2023-12-02 16:40:26,087 INFO L276 IsEmpty]: Start isEmpty. Operand 788 states and 1248 transitions. [2023-12-02 16:40:26,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2023-12-02 16:40:26,091 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:40:26,091 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 16:40:26,091 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-12-02 16:40:26,091 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 16:40:26,092 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:40:26,092 INFO L85 PathProgramCache]: Analyzing trace with hash -973677026, now seen corresponding path program 1 times [2023-12-02 16:40:26,092 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 16:40:26,092 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1252263102] [2023-12-02 16:40:26,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:40:26,092 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 16:40:26,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:40:26,390 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 16:40:26,391 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 16:40:26,391 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1252263102] [2023-12-02 16:40:26,391 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1252263102] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 16:40:26,391 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 16:40:26,392 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-12-02 16:40:26,392 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2107883371] [2023-12-02 16:40:26,392 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 16:40:26,393 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-02 16:40:26,393 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 16:40:26,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-02 16:40:26,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-12-02 16:40:26,394 INFO L87 Difference]: Start difference. First operand 788 states and 1248 transitions. Second operand has 6 states, 5 states have (on average 9.8) internal successors, (49), 5 states have internal predecessors, (49), 2 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 3 states have call predecessors, (15), 1 states have call successors, (15) [2023-12-02 16:40:26,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:40:26,590 INFO L93 Difference]: Finished difference Result 807 states and 1272 transitions. [2023-12-02 16:40:26,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-12-02 16:40:26,591 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 9.8) internal successors, (49), 5 states have internal predecessors, (49), 2 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 3 states have call predecessors, (15), 1 states have call successors, (15) Word has length 87 [2023-12-02 16:40:26,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:40:26,598 INFO L225 Difference]: With dead ends: 807 [2023-12-02 16:40:26,598 INFO L226 Difference]: Without dead ends: 792 [2023-12-02 16:40:26,599 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-12-02 16:40:26,601 INFO L413 NwaCegarLoop]: 579 mSDtfsCounter, 41 mSDsluCounter, 2268 mSDsCounter, 0 mSdLazyCounter, 187 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 2847 SdHoareTripleChecker+Invalid, 187 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 187 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 16:40:26,601 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 2847 Invalid, 187 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 187 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 16:40:26,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 792 states. [2023-12-02 16:40:26,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 792 to 788. [2023-12-02 16:40:26,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 788 states, 541 states have (on average 1.5693160813308689) internal successors, (849), 574 states have internal predecessors, (849), 198 states have call successors, (198), 48 states have call predecessors, (198), 48 states have return successors, (199), 190 states have call predecessors, (199), 193 states have call successors, (199) [2023-12-02 16:40:26,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 788 states to 788 states and 1246 transitions. [2023-12-02 16:40:26,692 INFO L78 Accepts]: Start accepts. Automaton has 788 states and 1246 transitions. Word has length 87 [2023-12-02 16:40:26,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:40:26,693 INFO L495 AbstractCegarLoop]: Abstraction has 788 states and 1246 transitions. [2023-12-02 16:40:26,693 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 9.8) internal successors, (49), 5 states have internal predecessors, (49), 2 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 3 states have call predecessors, (15), 1 states have call successors, (15) [2023-12-02 16:40:26,693 INFO L276 IsEmpty]: Start isEmpty. Operand 788 states and 1246 transitions. [2023-12-02 16:40:26,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2023-12-02 16:40:26,697 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:40:26,697 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 16:40:26,697 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-12-02 16:40:26,697 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 16:40:26,698 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:40:26,698 INFO L85 PathProgramCache]: Analyzing trace with hash 1660365447, now seen corresponding path program 1 times [2023-12-02 16:40:26,698 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 16:40:26,698 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2109248104] [2023-12-02 16:40:26,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:40:26,699 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 16:40:26,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:40:26,921 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 16:40:26,921 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 16:40:26,922 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2109248104] [2023-12-02 16:40:26,922 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2109248104] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 16:40:26,922 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 16:40:26,922 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-02 16:40:26,922 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1892976795] [2023-12-02 16:40:26,922 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 16:40:26,923 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 16:40:26,923 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 16:40:26,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 16:40:26,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-02 16:40:26,924 INFO L87 Difference]: Start difference. First operand 788 states and 1246 transitions. Second operand has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 4 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2023-12-02 16:40:28,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:40:28,473 INFO L93 Difference]: Finished difference Result 2521 states and 4055 transitions. [2023-12-02 16:40:28,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-02 16:40:28,474 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 4 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) Word has length 94 [2023-12-02 16:40:28,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:40:28,488 INFO L225 Difference]: With dead ends: 2521 [2023-12-02 16:40:28,489 INFO L226 Difference]: Without dead ends: 1749 [2023-12-02 16:40:28,494 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-12-02 16:40:28,495 INFO L413 NwaCegarLoop]: 298 mSDtfsCounter, 1219 mSDsluCounter, 378 mSDsCounter, 0 mSdLazyCounter, 914 mSolverCounterSat, 387 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1297 SdHoareTripleChecker+Valid, 676 SdHoareTripleChecker+Invalid, 1301 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 387 IncrementalHoareTripleChecker+Valid, 914 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2023-12-02 16:40:28,495 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1297 Valid, 676 Invalid, 1301 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [387 Valid, 914 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2023-12-02 16:40:28,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1749 states. [2023-12-02 16:40:28,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1749 to 1583. [2023-12-02 16:40:28,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1583 states, 1109 states have (on average 1.5807033363390441) internal successors, (1753), 1172 states have internal predecessors, (1753), 381 states have call successors, (381), 87 states have call predecessors, (381), 92 states have return successors, (399), 359 states have call predecessors, (399), 376 states have call successors, (399) [2023-12-02 16:40:28,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1583 states to 1583 states and 2533 transitions. [2023-12-02 16:40:28,623 INFO L78 Accepts]: Start accepts. Automaton has 1583 states and 2533 transitions. Word has length 94 [2023-12-02 16:40:28,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:40:28,623 INFO L495 AbstractCegarLoop]: Abstraction has 1583 states and 2533 transitions. [2023-12-02 16:40:28,624 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 4 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2023-12-02 16:40:28,624 INFO L276 IsEmpty]: Start isEmpty. Operand 1583 states and 2533 transitions. [2023-12-02 16:40:28,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2023-12-02 16:40:28,627 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:40:28,627 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 16:40:28,627 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-12-02 16:40:28,628 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 16:40:28,628 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:40:28,628 INFO L85 PathProgramCache]: Analyzing trace with hash -68428219, now seen corresponding path program 1 times [2023-12-02 16:40:28,628 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 16:40:28,629 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1943637571] [2023-12-02 16:40:28,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:40:28,629 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 16:40:28,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:40:28,852 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 16:40:28,852 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 16:40:28,853 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1943637571] [2023-12-02 16:40:28,853 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1943637571] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 16:40:28,853 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 16:40:28,853 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-02 16:40:28,853 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1975664527] [2023-12-02 16:40:28,853 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 16:40:28,854 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 16:40:28,854 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 16:40:28,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 16:40:28,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-02 16:40:28,855 INFO L87 Difference]: Start difference. First operand 1583 states and 2533 transitions. Second operand has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 4 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2023-12-02 16:40:30,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:40:30,475 INFO L93 Difference]: Finished difference Result 4838 states and 7859 transitions. [2023-12-02 16:40:30,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-02 16:40:30,476 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 4 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) Word has length 95 [2023-12-02 16:40:30,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:40:30,510 INFO L225 Difference]: With dead ends: 4838 [2023-12-02 16:40:30,510 INFO L226 Difference]: Without dead ends: 3274 [2023-12-02 16:40:30,521 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-12-02 16:40:30,522 INFO L413 NwaCegarLoop]: 306 mSDtfsCounter, 1209 mSDsluCounter, 378 mSDsCounter, 0 mSdLazyCounter, 914 mSolverCounterSat, 386 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1286 SdHoareTripleChecker+Valid, 684 SdHoareTripleChecker+Invalid, 1300 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 386 IncrementalHoareTripleChecker+Valid, 914 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2023-12-02 16:40:30,523 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1286 Valid, 684 Invalid, 1300 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [386 Valid, 914 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2023-12-02 16:40:30,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3274 states. [2023-12-02 16:40:30,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3274 to 3061. [2023-12-02 16:40:30,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3061 states, 2167 states have (on average 1.5874480849100139) internal successors, (3440), 2297 states have internal predecessors, (3440), 710 states have call successors, (710), 165 states have call predecessors, (710), 183 states have return successors, (788), 660 states have call predecessors, (788), 705 states have call successors, (788) [2023-12-02 16:40:30,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3061 states to 3061 states and 4938 transitions. [2023-12-02 16:40:30,807 INFO L78 Accepts]: Start accepts. Automaton has 3061 states and 4938 transitions. Word has length 95 [2023-12-02 16:40:30,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:40:30,807 INFO L495 AbstractCegarLoop]: Abstraction has 3061 states and 4938 transitions. [2023-12-02 16:40:30,807 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 4 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2023-12-02 16:40:30,808 INFO L276 IsEmpty]: Start isEmpty. Operand 3061 states and 4938 transitions. [2023-12-02 16:40:30,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2023-12-02 16:40:30,811 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:40:30,811 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 16:40:30,811 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-12-02 16:40:30,812 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 16:40:30,812 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:40:30,812 INFO L85 PathProgramCache]: Analyzing trace with hash -2121420407, now seen corresponding path program 1 times [2023-12-02 16:40:30,812 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 16:40:30,812 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [357353277] [2023-12-02 16:40:30,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:40:30,813 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 16:40:30,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:40:30,998 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 16:40:30,998 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 16:40:30,998 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [357353277] [2023-12-02 16:40:30,998 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [357353277] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 16:40:30,998 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 16:40:30,998 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-02 16:40:30,999 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1231142658] [2023-12-02 16:40:30,999 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 16:40:30,999 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 16:40:30,999 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 16:40:31,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 16:40:31,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-02 16:40:31,000 INFO L87 Difference]: Start difference. First operand 3061 states and 4938 transitions. Second operand has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 4 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2023-12-02 16:40:32,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:40:32,587 INFO L93 Difference]: Finished difference Result 9314 states and 15343 transitions. [2023-12-02 16:40:32,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-02 16:40:32,588 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 4 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) Word has length 96 [2023-12-02 16:40:32,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:40:32,643 INFO L225 Difference]: With dead ends: 9314 [2023-12-02 16:40:32,644 INFO L226 Difference]: Without dead ends: 6278 [2023-12-02 16:40:32,664 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-12-02 16:40:32,665 INFO L413 NwaCegarLoop]: 319 mSDtfsCounter, 1196 mSDsluCounter, 378 mSDsCounter, 0 mSdLazyCounter, 912 mSolverCounterSat, 385 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1272 SdHoareTripleChecker+Valid, 697 SdHoareTripleChecker+Invalid, 1297 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 385 IncrementalHoareTripleChecker+Valid, 912 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2023-12-02 16:40:32,665 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1272 Valid, 697 Invalid, 1297 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [385 Valid, 912 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2023-12-02 16:40:32,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6278 states. [2023-12-02 16:40:33,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6278 to 5962. [2023-12-02 16:40:33,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5962 states, 4238 states have (on average 1.5875412930627655) internal successors, (6728), 4508 states have internal predecessors, (6728), 1352 states have call successors, (1352), 321 states have call predecessors, (1352), 371 states have return successors, (1642), 1246 states have call predecessors, (1642), 1347 states have call successors, (1642) [2023-12-02 16:40:33,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5962 states to 5962 states and 9722 transitions. [2023-12-02 16:40:33,231 INFO L78 Accepts]: Start accepts. Automaton has 5962 states and 9722 transitions. Word has length 96 [2023-12-02 16:40:33,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:40:33,232 INFO L495 AbstractCegarLoop]: Abstraction has 5962 states and 9722 transitions. [2023-12-02 16:40:33,232 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 4 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2023-12-02 16:40:33,232 INFO L276 IsEmpty]: Start isEmpty. Operand 5962 states and 9722 transitions. [2023-12-02 16:40:33,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2023-12-02 16:40:33,235 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:40:33,236 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 16:40:33,236 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-12-02 16:40:33,236 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 16:40:33,236 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:40:33,237 INFO L85 PathProgramCache]: Analyzing trace with hash -1339664889, now seen corresponding path program 1 times [2023-12-02 16:40:33,237 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 16:40:33,237 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [949668831] [2023-12-02 16:40:33,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:40:33,237 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 16:40:33,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:40:33,390 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 16:40:33,391 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 16:40:33,391 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [949668831] [2023-12-02 16:40:33,391 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [949668831] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 16:40:33,391 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 16:40:33,391 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-02 16:40:33,391 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [527646350] [2023-12-02 16:40:33,391 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 16:40:33,392 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 16:40:33,392 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 16:40:33,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 16:40:33,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-02 16:40:33,393 INFO L87 Difference]: Start difference. First operand 5962 states and 9722 transitions. Second operand has 4 states, 4 states have (on average 14.0) internal successors, (56), 4 states have internal predecessors, (56), 4 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2023-12-02 16:40:35,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:40:35,131 INFO L93 Difference]: Finished difference Result 18119 states and 30598 transitions. [2023-12-02 16:40:35,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-02 16:40:35,132 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.0) internal successors, (56), 4 states have internal predecessors, (56), 4 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) Word has length 97 [2023-12-02 16:40:35,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:40:35,238 INFO L225 Difference]: With dead ends: 18119 [2023-12-02 16:40:35,239 INFO L226 Difference]: Without dead ends: 12194 [2023-12-02 16:40:35,269 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-12-02 16:40:35,269 INFO L413 NwaCegarLoop]: 332 mSDtfsCounter, 1183 mSDsluCounter, 375 mSDsCounter, 0 mSdLazyCounter, 914 mSolverCounterSat, 383 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1258 SdHoareTripleChecker+Valid, 707 SdHoareTripleChecker+Invalid, 1297 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 383 IncrementalHoareTripleChecker+Valid, 914 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-12-02 16:40:35,270 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1258 Valid, 707 Invalid, 1297 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [383 Valid, 914 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-12-02 16:40:35,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12194 states. [2023-12-02 16:40:36,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12194 to 11663. [2023-12-02 16:40:36,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11663 states, 8297 states have (on average 1.5841870555622515) internal successors, (13144), 8859 states have internal predecessors, (13144), 2606 states have call successors, (2606), 633 states have call predecessors, (2606), 759 states have return successors, (3648), 2388 states have call predecessors, (3648), 2601 states have call successors, (3648) [2023-12-02 16:40:36,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11663 states to 11663 states and 19398 transitions. [2023-12-02 16:40:36,501 INFO L78 Accepts]: Start accepts. Automaton has 11663 states and 19398 transitions. Word has length 97 [2023-12-02 16:40:36,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:40:36,502 INFO L495 AbstractCegarLoop]: Abstraction has 11663 states and 19398 transitions. [2023-12-02 16:40:36,502 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.0) internal successors, (56), 4 states have internal predecessors, (56), 4 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2023-12-02 16:40:36,502 INFO L276 IsEmpty]: Start isEmpty. Operand 11663 states and 19398 transitions. [2023-12-02 16:40:36,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2023-12-02 16:40:36,506 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:40:36,506 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 16:40:36,506 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-12-02 16:40:36,506 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 16:40:36,507 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:40:36,507 INFO L85 PathProgramCache]: Analyzing trace with hash 1419923595, now seen corresponding path program 1 times [2023-12-02 16:40:36,507 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 16:40:36,507 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [685434008] [2023-12-02 16:40:36,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:40:36,508 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 16:40:36,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:40:36,692 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 16:40:36,692 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 16:40:36,692 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [685434008] [2023-12-02 16:40:36,692 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [685434008] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 16:40:36,692 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 16:40:36,692 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-02 16:40:36,693 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [884618183] [2023-12-02 16:40:36,693 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 16:40:36,693 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 16:40:36,693 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 16:40:36,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 16:40:36,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-02 16:40:36,694 INFO L87 Difference]: Start difference. First operand 11663 states and 19398 transitions. Second operand has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 4 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2023-12-02 16:40:39,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:40:39,182 INFO L93 Difference]: Finished difference Result 35520 states and 62814 transitions. [2023-12-02 16:40:39,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-02 16:40:39,183 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 4 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) Word has length 98 [2023-12-02 16:40:39,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:40:39,291 INFO L225 Difference]: With dead ends: 35520 [2023-12-02 16:40:39,291 INFO L226 Difference]: Without dead ends: 23908 [2023-12-02 16:40:39,340 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-12-02 16:40:39,341 INFO L413 NwaCegarLoop]: 343 mSDtfsCounter, 1175 mSDsluCounter, 379 mSDsCounter, 0 mSdLazyCounter, 913 mSolverCounterSat, 379 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1249 SdHoareTripleChecker+Valid, 722 SdHoareTripleChecker+Invalid, 1292 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 379 IncrementalHoareTripleChecker+Valid, 913 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-12-02 16:40:39,342 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1249 Valid, 722 Invalid, 1292 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [379 Valid, 913 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-12-02 16:40:39,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23908 states. [2023-12-02 16:40:41,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23908 to 22836. [2023-12-02 16:40:41,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22836 states, 16271 states have (on average 1.582631675987954) internal successors, (25751), 17395 states have internal predecessors, (25751), 5054 states have call successors, (5054), 1255 states have call predecessors, (5054), 1510 states have return successors, (8491), 4611 states have call predecessors, (8491), 5049 states have call successors, (8491) [2023-12-02 16:40:41,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22836 states to 22836 states and 39296 transitions. [2023-12-02 16:40:41,233 INFO L78 Accepts]: Start accepts. Automaton has 22836 states and 39296 transitions. Word has length 98 [2023-12-02 16:40:41,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:40:41,234 INFO L495 AbstractCegarLoop]: Abstraction has 22836 states and 39296 transitions. [2023-12-02 16:40:41,234 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 4 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2023-12-02 16:40:41,234 INFO L276 IsEmpty]: Start isEmpty. Operand 22836 states and 39296 transitions. [2023-12-02 16:40:41,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2023-12-02 16:40:41,246 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:40:41,246 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 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, 1, 1, 1] [2023-12-02 16:40:41,247 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-12-02 16:40:41,247 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 16:40:41,247 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:40:41,247 INFO L85 PathProgramCache]: Analyzing trace with hash 1254957889, now seen corresponding path program 1 times [2023-12-02 16:40:41,248 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 16:40:41,248 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1656672232] [2023-12-02 16:40:41,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:40:41,248 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 16:40:41,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:40:41,521 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2023-12-02 16:40:41,521 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 16:40:41,521 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1656672232] [2023-12-02 16:40:41,521 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1656672232] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 16:40:41,521 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 16:40:41,521 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-02 16:40:41,522 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1001108774] [2023-12-02 16:40:41,522 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 16:40:41,522 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 16:40:41,522 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 16:40:41,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 16:40:41,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-02 16:40:41,523 INFO L87 Difference]: Start difference. First operand 22836 states and 39296 transitions. Second operand has 4 states, 4 states have (on average 18.5) internal successors, (74), 4 states have internal predecessors, (74), 2 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (24), 2 states have call predecessors, (24), 2 states have call successors, (24) [2023-12-02 16:40:43,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:40:43,202 INFO L93 Difference]: Finished difference Result 48931 states and 87571 transitions. [2023-12-02 16:40:43,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-02 16:40:43,203 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.5) internal successors, (74), 4 states have internal predecessors, (74), 2 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (24), 2 states have call predecessors, (24), 2 states have call successors, (24) Word has length 146 [2023-12-02 16:40:43,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:40:43,363 INFO L225 Difference]: With dead ends: 48931 [2023-12-02 16:40:43,363 INFO L226 Difference]: Without dead ends: 26112 [2023-12-02 16:40:43,450 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-12-02 16:40:43,450 INFO L413 NwaCegarLoop]: 611 mSDtfsCounter, 132 mSDsluCounter, 1167 mSDsCounter, 0 mSdLazyCounter, 117 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 145 SdHoareTripleChecker+Valid, 1778 SdHoareTripleChecker+Invalid, 141 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 16:40:43,451 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [145 Valid, 1778 Invalid, 141 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 117 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 16:40:43,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26112 states. [2023-12-02 16:40:45,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26112 to 23076. [2023-12-02 16:40:45,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23076 states, 16494 states have (on average 1.5776039772038317) internal successors, (26021), 17602 states have internal predecessors, (26021), 5071 states have call successors, (5071), 1255 states have call predecessors, (5071), 1510 states have return successors, (8508), 4628 states have call predecessors, (8508), 5066 states have call successors, (8508) [2023-12-02 16:40:45,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23076 states to 23076 states and 39600 transitions. [2023-12-02 16:40:45,325 INFO L78 Accepts]: Start accepts. Automaton has 23076 states and 39600 transitions. Word has length 146 [2023-12-02 16:40:45,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:40:45,325 INFO L495 AbstractCegarLoop]: Abstraction has 23076 states and 39600 transitions. [2023-12-02 16:40:45,325 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.5) internal successors, (74), 4 states have internal predecessors, (74), 2 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (24), 2 states have call predecessors, (24), 2 states have call successors, (24) [2023-12-02 16:40:45,325 INFO L276 IsEmpty]: Start isEmpty. Operand 23076 states and 39600 transitions. [2023-12-02 16:40:45,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2023-12-02 16:40:45,334 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:40:45,334 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 16:40:45,334 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-12-02 16:40:45,334 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 16:40:45,335 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:40:45,335 INFO L85 PathProgramCache]: Analyzing trace with hash 682705609, now seen corresponding path program 1 times [2023-12-02 16:40:45,335 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 16:40:45,335 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019302492] [2023-12-02 16:40:45,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:40:45,336 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 16:40:45,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:40:45,595 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2023-12-02 16:40:45,596 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 16:40:45,596 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019302492] [2023-12-02 16:40:45,596 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2019302492] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 16:40:45,596 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [63811253] [2023-12-02 16:40:45,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:40:45,596 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 16:40:45,597 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_241524ac-965a-42a3-ac5e-7ff0e23e7189/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 16:40:45,600 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_241524ac-965a-42a3-ac5e-7ff0e23e7189/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 16:40:45,608 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_241524ac-965a-42a3-ac5e-7ff0e23e7189/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-12-02 16:40:46,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:40:46,014 INFO L262 TraceCheckSpWp]: Trace formula consists of 1844 conjuncts, 3 conjunts are in the unsatisfiable core [2023-12-02 16:40:46,028 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 16:40:46,089 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 48 proven. 0 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2023-12-02 16:40:46,089 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 16:40:46,090 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [63811253] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 16:40:46,090 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 16:40:46,090 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 7 [2023-12-02 16:40:46,090 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1784548479] [2023-12-02 16:40:46,091 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 16:40:46,091 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 16:40:46,091 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 16:40:46,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 16:40:46,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-12-02 16:40:46,093 INFO L87 Difference]: Start difference. First operand 23076 states and 39600 transitions. Second operand has 4 states, 4 states have (on average 22.0) internal successors, (88), 4 states have internal predecessors, (88), 2 states have call successors, (26), 2 states have call predecessors, (26), 3 states have return successors, (25), 2 states have call predecessors, (25), 2 states have call successors, (25) [2023-12-02 16:40:47,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:40:47,958 INFO L93 Difference]: Finished difference Result 48631 states and 86786 transitions. [2023-12-02 16:40:47,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-02 16:40:47,959 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 22.0) internal successors, (88), 4 states have internal predecessors, (88), 2 states have call successors, (26), 2 states have call predecessors, (26), 3 states have return successors, (25), 2 states have call predecessors, (25), 2 states have call successors, (25) Word has length 153 [2023-12-02 16:40:47,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:40:48,065 INFO L225 Difference]: With dead ends: 48631 [2023-12-02 16:40:48,065 INFO L226 Difference]: Without dead ends: 25572 [2023-12-02 16:40:48,123 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 155 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-12-02 16:40:48,123 INFO L413 NwaCegarLoop]: 510 mSDtfsCounter, 213 mSDsluCounter, 996 mSDsCounter, 0 mSdLazyCounter, 254 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 213 SdHoareTripleChecker+Valid, 1506 SdHoareTripleChecker+Invalid, 263 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 254 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 16:40:48,124 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [213 Valid, 1506 Invalid, 263 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 254 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-02 16:40:48,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25572 states. [2023-12-02 16:40:49,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25572 to 25572. [2023-12-02 16:40:49,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25572 states, 18926 states have (on average 1.6217372926133362) internal successors, (30693), 20034 states have internal predecessors, (30693), 5071 states have call successors, (5071), 1319 states have call predecessors, (5071), 1574 states have return successors, (8508), 4628 states have call predecessors, (8508), 5066 states have call successors, (8508) [2023-12-02 16:40:49,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25572 states to 25572 states and 44272 transitions. [2023-12-02 16:40:49,720 INFO L78 Accepts]: Start accepts. Automaton has 25572 states and 44272 transitions. Word has length 153 [2023-12-02 16:40:49,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:40:49,721 INFO L495 AbstractCegarLoop]: Abstraction has 25572 states and 44272 transitions. [2023-12-02 16:40:49,721 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.0) internal successors, (88), 4 states have internal predecessors, (88), 2 states have call successors, (26), 2 states have call predecessors, (26), 3 states have return successors, (25), 2 states have call predecessors, (25), 2 states have call successors, (25) [2023-12-02 16:40:49,721 INFO L276 IsEmpty]: Start isEmpty. Operand 25572 states and 44272 transitions. [2023-12-02 16:40:49,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2023-12-02 16:40:49,735 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:40:49,735 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 5, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 16:40:49,746 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_241524ac-965a-42a3-ac5e-7ff0e23e7189/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-12-02 16:40:49,935 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_241524ac-965a-42a3-ac5e-7ff0e23e7189/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 16:40:49,936 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 16:40:49,936 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:40:49,936 INFO L85 PathProgramCache]: Analyzing trace with hash 1500166066, now seen corresponding path program 1 times [2023-12-02 16:40:49,936 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 16:40:49,936 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [544279866] [2023-12-02 16:40:49,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:40:49,937 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 16:40:49,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:40:50,155 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 9 proven. 15 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2023-12-02 16:40:50,155 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 16:40:50,155 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [544279866] [2023-12-02 16:40:50,155 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [544279866] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 16:40:50,155 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2005679902] [2023-12-02 16:40:50,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:40:50,156 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 16:40:50,156 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_241524ac-965a-42a3-ac5e-7ff0e23e7189/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 16:40:50,157 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_241524ac-965a-42a3-ac5e-7ff0e23e7189/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 16:40:50,160 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_241524ac-965a-42a3-ac5e-7ff0e23e7189/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-12-02 16:40:50,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:40:50,555 INFO L262 TraceCheckSpWp]: Trace formula consists of 1849 conjuncts, 3 conjunts are in the unsatisfiable core [2023-12-02 16:40:50,563 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 16:40:50,597 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 66 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2023-12-02 16:40:50,597 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 16:40:50,598 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2005679902] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 16:40:50,598 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 16:40:50,598 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2023-12-02 16:40:50,598 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [765056624] [2023-12-02 16:40:50,598 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 16:40:50,599 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 16:40:50,599 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 16:40:50,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 16:40:50,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-12-02 16:40:50,600 INFO L87 Difference]: Start difference. First operand 25572 states and 44272 transitions. Second operand has 4 states, 4 states have (on average 23.25) internal successors, (93), 4 states have internal predecessors, (93), 2 states have call successors, (26), 2 states have call predecessors, (26), 3 states have return successors, (25), 2 states have call predecessors, (25), 2 states have call successors, (25) [2023-12-02 16:40:52,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:40:52,051 INFO L93 Difference]: Finished difference Result 53623 states and 96064 transitions. [2023-12-02 16:40:52,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-02 16:40:52,052 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 23.25) internal successors, (93), 4 states have internal predecessors, (93), 2 states have call successors, (26), 2 states have call predecessors, (26), 3 states have return successors, (25), 2 states have call predecessors, (25), 2 states have call successors, (25) Word has length 158 [2023-12-02 16:40:52,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:40:52,142 INFO L225 Difference]: With dead ends: 53623 [2023-12-02 16:40:52,142 INFO L226 Difference]: Without dead ends: 28068 [2023-12-02 16:40:52,194 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 158 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 16:40:52,194 INFO L413 NwaCegarLoop]: 510 mSDtfsCounter, 211 mSDsluCounter, 996 mSDsCounter, 0 mSdLazyCounter, 248 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 211 SdHoareTripleChecker+Valid, 1506 SdHoareTripleChecker+Invalid, 262 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 248 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 16:40:52,194 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [211 Valid, 1506 Invalid, 262 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 248 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-02 16:40:52,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28068 states. [2023-12-02 16:40:53,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28068 to 28068. [2023-12-02 16:40:53,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28068 states, 21358 states have (on average 1.6558198333177263) internal successors, (35365), 22466 states have internal predecessors, (35365), 5071 states have call successors, (5071), 1383 states have call predecessors, (5071), 1638 states have return successors, (8508), 4628 states have call predecessors, (8508), 5066 states have call successors, (8508) [2023-12-02 16:40:53,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28068 states to 28068 states and 48944 transitions. [2023-12-02 16:40:53,969 INFO L78 Accepts]: Start accepts. Automaton has 28068 states and 48944 transitions. Word has length 158 [2023-12-02 16:40:53,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:40:53,970 INFO L495 AbstractCegarLoop]: Abstraction has 28068 states and 48944 transitions. [2023-12-02 16:40:53,970 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.25) internal successors, (93), 4 states have internal predecessors, (93), 2 states have call successors, (26), 2 states have call predecessors, (26), 3 states have return successors, (25), 2 states have call predecessors, (25), 2 states have call successors, (25) [2023-12-02 16:40:53,970 INFO L276 IsEmpty]: Start isEmpty. Operand 28068 states and 48944 transitions. [2023-12-02 16:40:53,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2023-12-02 16:40:53,977 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:40:53,977 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 4, 4, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 16:40:53,985 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_241524ac-965a-42a3-ac5e-7ff0e23e7189/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-12-02 16:40:54,177 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_241524ac-965a-42a3-ac5e-7ff0e23e7189/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-12-02 16:40:54,177 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 16:40:54,178 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:40:54,178 INFO L85 PathProgramCache]: Analyzing trace with hash -456160478, now seen corresponding path program 1 times [2023-12-02 16:40:54,178 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 16:40:54,178 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1488529054] [2023-12-02 16:40:54,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:40:54,178 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 16:40:54,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:40:56,278 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 1 proven. 19 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2023-12-02 16:40:56,278 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 16:40:56,278 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1488529054] [2023-12-02 16:40:56,279 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1488529054] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 16:40:56,279 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [401382771] [2023-12-02 16:40:56,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:40:56,279 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 16:40:56,279 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_241524ac-965a-42a3-ac5e-7ff0e23e7189/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 16:40:56,280 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_241524ac-965a-42a3-ac5e-7ff0e23e7189/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 16:40:56,288 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_241524ac-965a-42a3-ac5e-7ff0e23e7189/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-12-02 16:40:56,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:40:56,650 INFO L262 TraceCheckSpWp]: Trace formula consists of 1853 conjuncts, 3 conjunts are in the unsatisfiable core [2023-12-02 16:40:56,659 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 16:40:56,725 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 71 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-12-02 16:40:56,725 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 16:40:56,725 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [401382771] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 16:40:56,726 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 16:40:56,726 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [22] total 24 [2023-12-02 16:40:56,726 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [23478078] [2023-12-02 16:40:56,726 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 16:40:56,727 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 16:40:56,727 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 16:40:56,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 16:40:56,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=498, Unknown=0, NotChecked=0, Total=552 [2023-12-02 16:40:56,729 INFO L87 Difference]: Start difference. First operand 28068 states and 48944 transitions. Second operand has 4 states, 4 states have (on average 24.25) internal successors, (97), 4 states have internal predecessors, (97), 2 states have call successors, (26), 2 states have call predecessors, (26), 3 states have return successors, (25), 2 states have call predecessors, (25), 2 states have call successors, (25) [2023-12-02 16:40:58,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:40:58,597 INFO L93 Difference]: Finished difference Result 58615 states and 105342 transitions. [2023-12-02 16:40:58,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-02 16:40:58,597 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 24.25) internal successors, (97), 4 states have internal predecessors, (97), 2 states have call successors, (26), 2 states have call predecessors, (26), 3 states have return successors, (25), 2 states have call predecessors, (25), 2 states have call successors, (25) Word has length 162 [2023-12-02 16:40:58,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:40:58,686 INFO L225 Difference]: With dead ends: 58615 [2023-12-02 16:40:58,686 INFO L226 Difference]: Without dead ends: 30564 [2023-12-02 16:40:58,740 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 165 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=58, Invalid=542, Unknown=0, NotChecked=0, Total=600 [2023-12-02 16:40:58,741 INFO L413 NwaCegarLoop]: 510 mSDtfsCounter, 209 mSDsluCounter, 996 mSDsCounter, 0 mSdLazyCounter, 242 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 209 SdHoareTripleChecker+Valid, 1506 SdHoareTripleChecker+Invalid, 261 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 242 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 16:40:58,741 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [209 Valid, 1506 Invalid, 261 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 242 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-02 16:40:58,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30564 states. [2023-12-02 16:41:00,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30564 to 30564. [2023-12-02 16:41:00,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30564 states, 23790 states have (on average 1.6829340058848257) internal successors, (40037), 24898 states have internal predecessors, (40037), 5071 states have call successors, (5071), 1447 states have call predecessors, (5071), 1702 states have return successors, (8508), 4628 states have call predecessors, (8508), 5066 states have call successors, (8508) [2023-12-02 16:41:00,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30564 states to 30564 states and 53616 transitions. [2023-12-02 16:41:00,262 INFO L78 Accepts]: Start accepts. Automaton has 30564 states and 53616 transitions. Word has length 162 [2023-12-02 16:41:00,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:41:00,262 INFO L495 AbstractCegarLoop]: Abstraction has 30564 states and 53616 transitions. [2023-12-02 16:41:00,263 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.25) internal successors, (97), 4 states have internal predecessors, (97), 2 states have call successors, (26), 2 states have call predecessors, (26), 3 states have return successors, (25), 2 states have call predecessors, (25), 2 states have call successors, (25) [2023-12-02 16:41:00,263 INFO L276 IsEmpty]: Start isEmpty. Operand 30564 states and 53616 transitions. [2023-12-02 16:41:00,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2023-12-02 16:41:00,269 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:41:00,269 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 4, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 16:41:00,275 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_241524ac-965a-42a3-ac5e-7ff0e23e7189/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-12-02 16:41:00,469 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_241524ac-965a-42a3-ac5e-7ff0e23e7189/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-12-02 16:41:00,469 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 16:41:00,470 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:41:00,470 INFO L85 PathProgramCache]: Analyzing trace with hash 553011453, now seen corresponding path program 1 times [2023-12-02 16:41:00,470 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 16:41:00,470 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1690760200] [2023-12-02 16:41:00,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:41:00,470 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 16:41:00,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:41:01,994 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 1 proven. 19 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2023-12-02 16:41:01,995 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 16:41:01,995 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1690760200] [2023-12-02 16:41:01,995 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1690760200] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 16:41:01,995 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1903441879] [2023-12-02 16:41:01,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:41:01,995 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 16:41:01,995 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_241524ac-965a-42a3-ac5e-7ff0e23e7189/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 16:41:01,996 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_241524ac-965a-42a3-ac5e-7ff0e23e7189/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 16:41:01,997 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_241524ac-965a-42a3-ac5e-7ff0e23e7189/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-12-02 16:41:02,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:41:02,306 INFO L262 TraceCheckSpWp]: Trace formula consists of 1856 conjuncts, 3 conjunts are in the unsatisfiable core [2023-12-02 16:41:02,311 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 16:41:02,376 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 62 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2023-12-02 16:41:02,376 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 16:41:02,376 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1903441879] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 16:41:02,376 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 16:41:02,376 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [22] total 24 [2023-12-02 16:41:02,377 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1890268438] [2023-12-02 16:41:02,377 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 16:41:02,377 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 16:41:02,377 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 16:41:02,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 16:41:02,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=498, Unknown=0, NotChecked=0, Total=552 [2023-12-02 16:41:02,379 INFO L87 Difference]: Start difference. First operand 30564 states and 53616 transitions. Second operand has 4 states, 4 states have (on average 25.25) internal successors, (101), 4 states have internal predecessors, (101), 2 states have call successors, (26), 2 states have call predecessors, (26), 3 states have return successors, (25), 2 states have call predecessors, (25), 2 states have call successors, (25) [2023-12-02 16:41:04,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:41:04,297 INFO L93 Difference]: Finished difference Result 63607 states and 114620 transitions. [2023-12-02 16:41:04,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-02 16:41:04,297 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 25.25) internal successors, (101), 4 states have internal predecessors, (101), 2 states have call successors, (26), 2 states have call predecessors, (26), 3 states have return successors, (25), 2 states have call predecessors, (25), 2 states have call successors, (25) Word has length 165 [2023-12-02 16:41:04,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:41:04,416 INFO L225 Difference]: With dead ends: 63607 [2023-12-02 16:41:04,416 INFO L226 Difference]: Without dead ends: 33060 [2023-12-02 16:41:04,493 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 168 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=58, Invalid=542, Unknown=0, NotChecked=0, Total=600 [2023-12-02 16:41:04,494 INFO L413 NwaCegarLoop]: 510 mSDtfsCounter, 207 mSDsluCounter, 996 mSDsCounter, 0 mSdLazyCounter, 236 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 207 SdHoareTripleChecker+Valid, 1506 SdHoareTripleChecker+Invalid, 260 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 236 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 16:41:04,494 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [207 Valid, 1506 Invalid, 260 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 236 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-02 16:41:04,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33060 states. [2023-12-02 16:41:05,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33060 to 33060. [2023-12-02 16:41:06,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33060 states, 26222 states have (on average 1.7050186865990389) internal successors, (44709), 27330 states have internal predecessors, (44709), 5071 states have call successors, (5071), 1511 states have call predecessors, (5071), 1766 states have return successors, (8508), 4628 states have call predecessors, (8508), 5066 states have call successors, (8508) [2023-12-02 16:41:06,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33060 states to 33060 states and 58288 transitions. [2023-12-02 16:41:06,100 INFO L78 Accepts]: Start accepts. Automaton has 33060 states and 58288 transitions. Word has length 165 [2023-12-02 16:41:06,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:41:06,100 INFO L495 AbstractCegarLoop]: Abstraction has 33060 states and 58288 transitions. [2023-12-02 16:41:06,100 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 25.25) internal successors, (101), 4 states have internal predecessors, (101), 2 states have call successors, (26), 2 states have call predecessors, (26), 3 states have return successors, (25), 2 states have call predecessors, (25), 2 states have call successors, (25) [2023-12-02 16:41:06,100 INFO L276 IsEmpty]: Start isEmpty. Operand 33060 states and 58288 transitions. [2023-12-02 16:41:06,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2023-12-02 16:41:06,106 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:41:06,107 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 4, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 16:41:06,113 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_241524ac-965a-42a3-ac5e-7ff0e23e7189/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-12-02 16:41:06,307 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_241524ac-965a-42a3-ac5e-7ff0e23e7189/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-12-02 16:41:06,307 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 16:41:06,307 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:41:06,308 INFO L85 PathProgramCache]: Analyzing trace with hash -256880723, now seen corresponding path program 1 times [2023-12-02 16:41:06,308 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 16:41:06,308 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2031876132] [2023-12-02 16:41:06,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:41:06,308 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 16:41:06,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:41:07,732 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 1 proven. 19 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2023-12-02 16:41:07,732 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 16:41:07,732 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2031876132] [2023-12-02 16:41:07,732 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2031876132] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 16:41:07,732 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [766154153] [2023-12-02 16:41:07,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:41:07,733 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 16:41:07,733 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_241524ac-965a-42a3-ac5e-7ff0e23e7189/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 16:41:07,734 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_241524ac-965a-42a3-ac5e-7ff0e23e7189/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 16:41:07,734 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_241524ac-965a-42a3-ac5e-7ff0e23e7189/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-12-02 16:41:08,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:41:08,056 INFO L262 TraceCheckSpWp]: Trace formula consists of 1858 conjuncts, 3 conjunts are in the unsatisfiable core [2023-12-02 16:41:08,062 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 16:41:08,112 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2023-12-02 16:41:08,112 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 16:41:08,112 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [766154153] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 16:41:08,112 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 16:41:08,113 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [22] total 24 [2023-12-02 16:41:08,113 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1619267038] [2023-12-02 16:41:08,113 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 16:41:08,113 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 16:41:08,113 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 16:41:08,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 16:41:08,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=498, Unknown=0, NotChecked=0, Total=552 [2023-12-02 16:41:08,115 INFO L87 Difference]: Start difference. First operand 33060 states and 58288 transitions. Second operand has 4 states, 4 states have (on average 24.25) internal successors, (97), 4 states have internal predecessors, (97), 2 states have call successors, (26), 2 states have call predecessors, (26), 3 states have return successors, (25), 2 states have call predecessors, (25), 2 states have call successors, (25) [2023-12-02 16:41:09,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:41:09,483 INFO L93 Difference]: Finished difference Result 68599 states and 123898 transitions. [2023-12-02 16:41:09,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-02 16:41:09,483 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 24.25) internal successors, (97), 4 states have internal predecessors, (97), 2 states have call successors, (26), 2 states have call predecessors, (26), 3 states have return successors, (25), 2 states have call predecessors, (25), 2 states have call successors, (25) Word has length 167 [2023-12-02 16:41:09,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:41:09,607 INFO L225 Difference]: With dead ends: 68599 [2023-12-02 16:41:09,607 INFO L226 Difference]: Without dead ends: 35556 [2023-12-02 16:41:09,683 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 170 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=58, Invalid=542, Unknown=0, NotChecked=0, Total=600 [2023-12-02 16:41:09,684 INFO L413 NwaCegarLoop]: 510 mSDtfsCounter, 205 mSDsluCounter, 996 mSDsCounter, 0 mSdLazyCounter, 230 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 205 SdHoareTripleChecker+Valid, 1506 SdHoareTripleChecker+Invalid, 259 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 230 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 16:41:09,684 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [205 Valid, 1506 Invalid, 259 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 230 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-02 16:41:09,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35556 states. [2023-12-02 16:41:11,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35556 to 35556. [2023-12-02 16:41:11,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35556 states, 28654 states have (on average 1.7233545054791652) internal successors, (49381), 29762 states have internal predecessors, (49381), 5071 states have call successors, (5071), 1575 states have call predecessors, (5071), 1830 states have return successors, (8508), 4628 states have call predecessors, (8508), 5066 states have call successors, (8508) [2023-12-02 16:41:11,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35556 states to 35556 states and 62960 transitions. [2023-12-02 16:41:11,233 INFO L78 Accepts]: Start accepts. Automaton has 35556 states and 62960 transitions. Word has length 167 [2023-12-02 16:41:11,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:41:11,234 INFO L495 AbstractCegarLoop]: Abstraction has 35556 states and 62960 transitions. [2023-12-02 16:41:11,234 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.25) internal successors, (97), 4 states have internal predecessors, (97), 2 states have call successors, (26), 2 states have call predecessors, (26), 3 states have return successors, (25), 2 states have call predecessors, (25), 2 states have call successors, (25) [2023-12-02 16:41:11,234 INFO L276 IsEmpty]: Start isEmpty. Operand 35556 states and 62960 transitions. [2023-12-02 16:41:11,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2023-12-02 16:41:11,239 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:41:11,239 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 4, 3, 3, 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, 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 16:41:11,246 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_241524ac-965a-42a3-ac5e-7ff0e23e7189/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-12-02 16:41:11,440 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_241524ac-965a-42a3-ac5e-7ff0e23e7189/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-12-02 16:41:11,440 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 16:41:11,440 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:41:11,440 INFO L85 PathProgramCache]: Analyzing trace with hash 327691484, now seen corresponding path program 1 times [2023-12-02 16:41:11,440 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 16:41:11,441 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1100005932] [2023-12-02 16:41:11,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:41:11,441 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 16:41:11,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:41:12,763 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 1 proven. 19 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2023-12-02 16:41:12,764 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 16:41:12,764 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1100005932] [2023-12-02 16:41:12,764 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1100005932] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 16:41:12,764 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2068351208] [2023-12-02 16:41:12,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:41:12,764 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 16:41:12,764 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_241524ac-965a-42a3-ac5e-7ff0e23e7189/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 16:41:12,765 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_241524ac-965a-42a3-ac5e-7ff0e23e7189/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 16:41:12,767 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_241524ac-965a-42a3-ac5e-7ff0e23e7189/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-12-02 16:41:13,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:41:13,072 INFO L262 TraceCheckSpWp]: Trace formula consists of 1855 conjuncts, 7 conjunts are in the unsatisfiable core [2023-12-02 16:41:13,076 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 16:41:13,119 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2023-12-02 16:41:13,119 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 16:41:13,119 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2068351208] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 16:41:13,119 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 16:41:13,120 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [22] total 24 [2023-12-02 16:41:13,120 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2020299723] [2023-12-02 16:41:13,120 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 16:41:13,120 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 16:41:13,120 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 16:41:13,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 16:41:13,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=498, Unknown=0, NotChecked=0, Total=552 [2023-12-02 16:41:13,121 INFO L87 Difference]: Start difference. First operand 35556 states and 62960 transitions. Second operand has 4 states, 4 states have (on average 23.25) internal successors, (93), 4 states have internal predecessors, (93), 2 states have call successors, (26), 2 states have call predecessors, (26), 2 states have return successors, (25), 2 states have call predecessors, (25), 1 states have call successors, (25) [2023-12-02 16:41:14,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:41:14,539 INFO L93 Difference]: Finished difference Result 37176 states and 68603 transitions. [2023-12-02 16:41:14,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-02 16:41:14,540 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 23.25) internal successors, (93), 4 states have internal predecessors, (93), 2 states have call successors, (26), 2 states have call predecessors, (26), 2 states have return successors, (25), 2 states have call predecessors, (25), 1 states have call successors, (25) Word has length 167 [2023-12-02 16:41:14,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:41:14,662 INFO L225 Difference]: With dead ends: 37176 [2023-12-02 16:41:14,662 INFO L226 Difference]: Without dead ends: 37019 [2023-12-02 16:41:14,681 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 170 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=58, Invalid=542, Unknown=0, NotChecked=0, Total=600 [2023-12-02 16:41:14,681 INFO L413 NwaCegarLoop]: 612 mSDtfsCounter, 44 mSDsluCounter, 1175 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 1787 SdHoareTripleChecker+Invalid, 132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 16:41:14,682 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 1787 Invalid, 132 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 120 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 16:41:14,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37019 states. [2023-12-02 16:41:16,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37019 to 35680. [2023-12-02 16:41:16,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35680 states, 28778 states have (on average 1.7202376815623046) internal successors, (49505), 29886 states have internal predecessors, (49505), 5071 states have call successors, (5071), 1575 states have call predecessors, (5071), 1830 states have return successors, (8508), 4628 states have call predecessors, (8508), 5066 states have call successors, (8508) [2023-12-02 16:41:16,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35680 states to 35680 states and 63084 transitions. [2023-12-02 16:41:16,281 INFO L78 Accepts]: Start accepts. Automaton has 35680 states and 63084 transitions. Word has length 167 [2023-12-02 16:41:16,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:41:16,281 INFO L495 AbstractCegarLoop]: Abstraction has 35680 states and 63084 transitions. [2023-12-02 16:41:16,281 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.25) internal successors, (93), 4 states have internal predecessors, (93), 2 states have call successors, (26), 2 states have call predecessors, (26), 2 states have return successors, (25), 2 states have call predecessors, (25), 1 states have call successors, (25) [2023-12-02 16:41:16,281 INFO L276 IsEmpty]: Start isEmpty. Operand 35680 states and 63084 transitions. [2023-12-02 16:41:16,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2023-12-02 16:41:16,292 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:41:16,292 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 5, 4, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 16:41:16,298 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_241524ac-965a-42a3-ac5e-7ff0e23e7189/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-12-02 16:41:16,492 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_241524ac-965a-42a3-ac5e-7ff0e23e7189/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-12-02 16:41:16,493 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 16:41:16,493 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:41:16,493 INFO L85 PathProgramCache]: Analyzing trace with hash -1025402068, now seen corresponding path program 1 times [2023-12-02 16:41:16,493 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 16:41:16,493 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1671100178] [2023-12-02 16:41:16,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:41:16,493 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 16:41:16,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:41:18,100 INFO L134 CoverageAnalysis]: Checked inductivity of 124 backedges. 1 proven. 23 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2023-12-02 16:41:18,100 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 16:41:18,100 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1671100178] [2023-12-02 16:41:18,101 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1671100178] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 16:41:18,101 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [556986581] [2023-12-02 16:41:18,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:41:18,101 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 16:41:18,101 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_241524ac-965a-42a3-ac5e-7ff0e23e7189/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 16:41:18,102 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_241524ac-965a-42a3-ac5e-7ff0e23e7189/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 16:41:18,103 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_241524ac-965a-42a3-ac5e-7ff0e23e7189/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-12-02 16:41:18,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:41:18,442 INFO L262 TraceCheckSpWp]: Trace formula consists of 1919 conjuncts, 53 conjunts are in the unsatisfiable core [2023-12-02 16:41:18,450 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 16:41:20,080 INFO L134 CoverageAnalysis]: Checked inductivity of 124 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2023-12-02 16:41:20,080 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 16:41:24,104 WARN L176 XnfTransformerHelper]: Simplifying conjunction of 9813 disjunctions. This might take some time... [2023-12-02 16:41:30,332 INFO L192 XnfTransformerHelper]: Simplified to conjunction of 9813 disjunctions. [2023-12-02 16:41:30,666 WARN L176 XnfTransformerHelper]: Simplifying conjunction of 9813 disjunctions. This might take some time... [2023-12-02 16:41:36,898 INFO L192 XnfTransformerHelper]: Simplified to conjunction of 9813 disjunctions. [2023-12-02 16:41:37,012 WARN L176 XnfTransformerHelper]: Simplifying conjunction of 49188 disjunctions. This might take some time... [2023-12-02 16:44:27,253 INFO L192 XnfTransformerHelper]: Simplified to conjunction of 49188 disjunctions. [2023-12-02 16:44:27,684 WARN L176 XnfTransformerHelper]: Simplifying conjunction of 9813 disjunctions. This might take some time... [2023-12-02 16:44:34,006 INFO L192 XnfTransformerHelper]: Simplified to conjunction of 9813 disjunctions.