./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/elevator_spec1_product21.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_73fd5982-3c43-445e-bd00-ee8817abc353/bin/utaipan-verify-nQ1chXbOIh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73fd5982-3c43-445e-bd00-ee8817abc353/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_73fd5982-3c43-445e-bd00-ee8817abc353/bin/utaipan-verify-nQ1chXbOIh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73fd5982-3c43-445e-bd00-ee8817abc353/bin/utaipan-verify-nQ1chXbOIh/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec1_product21.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73fd5982-3c43-445e-bd00-ee8817abc353/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_73fd5982-3c43-445e-bd00-ee8817abc353/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 b57471ff7da280977e3c808cc9c84e84708264492bfd0c5193cf422adb691b70 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-12-02 18:48:31,446 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-02 18:48:31,513 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73fd5982-3c43-445e-bd00-ee8817abc353/bin/utaipan-verify-nQ1chXbOIh/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-12-02 18:48:31,519 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-02 18:48:31,519 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-12-02 18:48:31,545 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-02 18:48:31,546 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-12-02 18:48:31,546 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-12-02 18:48:31,547 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-02 18:48:31,547 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-02 18:48:31,548 INFO L153 SettingsManager]: * User list type=DISABLED [2023-12-02 18:48:31,548 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-12-02 18:48:31,549 INFO L153 SettingsManager]: * Explicit value domain=true [2023-12-02 18:48:31,550 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-12-02 18:48:31,550 INFO L153 SettingsManager]: * Octagon Domain=false [2023-12-02 18:48:31,551 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-12-02 18:48:31,551 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-12-02 18:48:31,552 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-12-02 18:48:31,552 INFO L153 SettingsManager]: * Interval Domain=false [2023-12-02 18:48:31,553 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-12-02 18:48:31,553 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-12-02 18:48:31,554 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-12-02 18:48:31,555 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-02 18:48:31,555 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-12-02 18:48:31,556 INFO L153 SettingsManager]: * sizeof long=4 [2023-12-02 18:48:31,556 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-02 18:48:31,557 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-12-02 18:48:31,557 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-02 18:48:31,557 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-12-02 18:48:31,558 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-02 18:48:31,558 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-12-02 18:48:31,559 INFO L153 SettingsManager]: * sizeof long double=12 [2023-12-02 18:48:31,559 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-12-02 18:48:31,559 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-02 18:48:31,559 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-02 18:48:31,560 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-12-02 18:48:31,560 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-02 18:48:31,560 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 18:48:31,560 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-02 18:48:31,561 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-02 18:48:31,561 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-12-02 18:48:31,561 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-12-02 18:48:31,561 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-12-02 18:48:31,562 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-02 18:48:31,562 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-12-02 18:48:31,562 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-12-02 18:48:31,562 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-12-02 18:48:31,562 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_73fd5982-3c43-445e-bd00-ee8817abc353/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73fd5982-3c43-445e-bd00-ee8817abc353/bin/utaipan-verify-nQ1chXbOIh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b57471ff7da280977e3c808cc9c84e84708264492bfd0c5193cf422adb691b70 [2023-12-02 18:48:31,786 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-02 18:48:31,807 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-02 18:48:31,809 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-02 18:48:31,811 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-02 18:48:31,811 INFO L274 PluginConnector]: CDTParser initialized [2023-12-02 18:48:31,813 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73fd5982-3c43-445e-bd00-ee8817abc353/bin/utaipan-verify-nQ1chXbOIh/../../sv-benchmarks/c/product-lines/elevator_spec1_product21.cil.c [2023-12-02 18:48:34,547 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-02 18:48:34,817 INFO L384 CDTParser]: Found 1 translation units. [2023-12-02 18:48:34,817 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73fd5982-3c43-445e-bd00-ee8817abc353/sv-benchmarks/c/product-lines/elevator_spec1_product21.cil.c [2023-12-02 18:48:34,837 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73fd5982-3c43-445e-bd00-ee8817abc353/bin/utaipan-verify-nQ1chXbOIh/data/09e00d9a1/43a6bb18d42941bc8f6ecac8b4ea5359/FLAG64c9fe680 [2023-12-02 18:48:34,849 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73fd5982-3c43-445e-bd00-ee8817abc353/bin/utaipan-verify-nQ1chXbOIh/data/09e00d9a1/43a6bb18d42941bc8f6ecac8b4ea5359 [2023-12-02 18:48:34,851 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-02 18:48:34,852 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-12-02 18:48:34,853 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-02 18:48:34,853 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-02 18:48:34,858 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-02 18:48:34,858 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 06:48:34" (1/1) ... [2023-12-02 18:48:34,860 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@78f0203f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:48:34, skipping insertion in model container [2023-12-02 18:48:34,860 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 06:48:34" (1/1) ... [2023-12-02 18:48:34,936 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-02 18:48:35,322 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_73fd5982-3c43-445e-bd00-ee8817abc353/sv-benchmarks/c/product-lines/elevator_spec1_product21.cil.c[66510,66523] [2023-12-02 18:48:35,332 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 18:48:35,344 INFO L202 MainTranslator]: Completed pre-run [2023-12-02 18:48:35,351 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Elevator.i","") [48] [2023-12-02 18:48:35,352 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Test.i","") [1575] [2023-12-02 18:48:35,353 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"libacc.i","") [1934] [2023-12-02 18:48:35,353 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"UnitTests.i","") [2300] [2023-12-02 18:48:35,353 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"scenario.i","") [2391] [2023-12-02 18:48:35,353 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"featureselect.i","") [2404] [2023-12-02 18:48:35,353 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Floor.i","") [2439] [2023-12-02 18:48:35,354 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"wsllib_check.i","") [3105] [2023-12-02 18:48:35,354 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Person.i","") [3114] [2023-12-02 18:48:35,354 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Specification1_spec.i","") [3232] [2023-12-02 18:48:35,434 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_73fd5982-3c43-445e-bd00-ee8817abc353/sv-benchmarks/c/product-lines/elevator_spec1_product21.cil.c[66510,66523] [2023-12-02 18:48:35,438 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 18:48:35,516 INFO L206 MainTranslator]: Completed translation [2023-12-02 18:48:35,516 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:48:35 WrapperNode [2023-12-02 18:48:35,516 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-02 18:48:35,517 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-02 18:48:35,517 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-02 18:48:35,518 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-02 18:48:35,523 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:48:35" (1/1) ... [2023-12-02 18:48:35,551 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:48:35" (1/1) ... [2023-12-02 18:48:35,590 INFO L138 Inliner]: procedures = 92, calls = 340, calls flagged for inlining = 25, calls inlined = 22, statements flattened = 849 [2023-12-02 18:48:35,590 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-02 18:48:35,591 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-02 18:48:35,591 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-02 18:48:35,591 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-02 18:48:35,601 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:48:35" (1/1) ... [2023-12-02 18:48:35,601 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:48:35" (1/1) ... [2023-12-02 18:48:35,608 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:48:35" (1/1) ... [2023-12-02 18:48:35,609 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:48:35" (1/1) ... [2023-12-02 18:48:35,630 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:48:35" (1/1) ... [2023-12-02 18:48:35,645 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:48:35" (1/1) ... [2023-12-02 18:48:35,649 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:48:35" (1/1) ... [2023-12-02 18:48:35,656 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:48:35" (1/1) ... [2023-12-02 18:48:35,665 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-02 18:48:35,666 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-02 18:48:35,666 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-02 18:48:35,666 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-02 18:48:35,667 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:48:35" (1/1) ... [2023-12-02 18:48:35,673 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 18:48:35,688 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73fd5982-3c43-445e-bd00-ee8817abc353/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 18:48:35,701 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73fd5982-3c43-445e-bd00-ee8817abc353/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-12-02 18:48:35,709 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73fd5982-3c43-445e-bd00-ee8817abc353/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-12-02 18:48:35,740 INFO L130 BoogieDeclarations]: Found specification of procedure angelinaCall [2023-12-02 18:48:35,740 INFO L138 BoogieDeclarations]: Found implementation of procedure angelinaCall [2023-12-02 18:48:35,740 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-02 18:48:35,741 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2023-12-02 18:48:35,741 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2023-12-02 18:48:35,741 INFO L130 BoogieDeclarations]: Found specification of procedure bigMacCall [2023-12-02 18:48:35,741 INFO L138 BoogieDeclarations]: Found implementation of procedure bigMacCall [2023-12-02 18:48:35,741 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2023-12-02 18:48:35,741 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2023-12-02 18:48:35,741 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2023-12-02 18:48:35,741 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2023-12-02 18:48:35,742 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2023-12-02 18:48:35,742 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2023-12-02 18:48:35,742 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2023-12-02 18:48:35,742 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2023-12-02 18:48:35,742 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2023-12-02 18:48:35,742 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2023-12-02 18:48:35,742 INFO L130 BoogieDeclarations]: Found specification of procedure areDoorsOpen [2023-12-02 18:48:35,742 INFO L138 BoogieDeclarations]: Found implementation of procedure areDoorsOpen [2023-12-02 18:48:35,743 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2023-12-02 18:48:35,743 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2023-12-02 18:48:35,743 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2023-12-02 18:48:35,743 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2023-12-02 18:48:35,743 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2023-12-02 18:48:35,743 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2023-12-02 18:48:35,743 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2023-12-02 18:48:35,743 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2023-12-02 18:48:35,744 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2023-12-02 18:48:35,744 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2023-12-02 18:48:35,744 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2023-12-02 18:48:35,744 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2023-12-02 18:48:35,744 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2023-12-02 18:48:35,744 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2023-12-02 18:48:35,744 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2023-12-02 18:48:35,744 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2023-12-02 18:48:35,744 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2023-12-02 18:48:35,745 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2023-12-02 18:48:35,745 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2023-12-02 18:48:35,745 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2023-12-02 18:48:35,745 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-12-02 18:48:35,745 INFO L130 BoogieDeclarations]: Found specification of procedure buttonForFloorIsPressed [2023-12-02 18:48:35,745 INFO L138 BoogieDeclarations]: Found implementation of procedure buttonForFloorIsPressed [2023-12-02 18:48:35,745 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2023-12-02 18:48:35,745 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2023-12-02 18:48:35,746 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2023-12-02 18:48:35,746 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2023-12-02 18:48:35,746 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2023-12-02 18:48:35,746 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2023-12-02 18:48:35,746 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection__wrappee__weight [2023-12-02 18:48:35,746 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection__wrappee__weight [2023-12-02 18:48:35,746 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-02 18:48:35,746 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-02 18:48:35,746 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2023-12-02 18:48:35,747 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2023-12-02 18:48:35,895 INFO L241 CfgBuilder]: Building ICFG [2023-12-02 18:48:35,898 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-02 18:48:36,811 INFO L282 CfgBuilder]: Performing block encoding [2023-12-02 18:48:37,637 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-02 18:48:37,637 INFO L309 CfgBuilder]: Removed 1 assume(true) statements. [2023-12-02 18:48:37,639 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 06:48:37 BoogieIcfgContainer [2023-12-02 18:48:37,639 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-02 18:48:37,641 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-02 18:48:37,642 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-02 18:48:37,645 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-02 18:48:37,645 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.12 06:48:34" (1/3) ... [2023-12-02 18:48:37,646 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@786a0e37 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 06:48:37, skipping insertion in model container [2023-12-02 18:48:37,646 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:48:35" (2/3) ... [2023-12-02 18:48:37,646 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@786a0e37 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 06:48:37, skipping insertion in model container [2023-12-02 18:48:37,646 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 06:48:37" (3/3) ... [2023-12-02 18:48:37,648 INFO L112 eAbstractionObserver]: Analyzing ICFG elevator_spec1_product21.cil.c [2023-12-02 18:48:37,667 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-02 18:48:37,667 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-12-02 18:48:37,724 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-02 18:48:37,731 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;@529e6694, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-02 18:48:37,732 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-12-02 18:48:37,738 INFO L276 IsEmpty]: Start isEmpty. Operand has 381 states, 256 states have (on average 1.58984375) internal successors, (407), 277 states have internal predecessors, (407), 98 states have call successors, (98), 25 states have call predecessors, (98), 25 states have return successors, (98), 92 states have call predecessors, (98), 98 states have call successors, (98) [2023-12-02 18:48:37,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2023-12-02 18:48:37,762 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:48:37,763 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 18:48:37,763 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 18:48:37,768 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:48:37,769 INFO L85 PathProgramCache]: Analyzing trace with hash 412965801, now seen corresponding path program 1 times [2023-12-02 18:48:37,778 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 18:48:37,779 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [361035136] [2023-12-02 18:48:37,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:48:37,779 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 18:48:38,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:48:38,524 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-02 18:48:38,525 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 18:48:38,525 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [361035136] [2023-12-02 18:48:38,526 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [361035136] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 18:48:38,526 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 18:48:38,526 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-12-02 18:48:38,528 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2043031839] [2023-12-02 18:48:38,528 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 18:48:38,533 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-02 18:48:38,533 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 18:48:38,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-02 18:48:38,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-12-02 18:48:38,566 INFO L87 Difference]: Start difference. First operand has 381 states, 256 states have (on average 1.58984375) internal successors, (407), 277 states have internal predecessors, (407), 98 states have call successors, (98), 25 states have call predecessors, (98), 25 states have return successors, (98), 92 states have call predecessors, (98), 98 states have call successors, (98) Second operand has 5 states, 5 states have (on average 9.4) internal successors, (47), 5 states have internal predecessors, (47), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2023-12-02 18:48:39,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:48:39,052 INFO L93 Difference]: Finished difference Result 851 states and 1377 transitions. [2023-12-02 18:48:39,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-02 18:48:39,055 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.4) internal successors, (47), 5 states have internal predecessors, (47), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) Word has length 76 [2023-12-02 18:48:39,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:48:39,074 INFO L225 Difference]: With dead ends: 851 [2023-12-02 18:48:39,074 INFO L226 Difference]: Without dead ends: 490 [2023-12-02 18:48:39,082 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-12-02 18:48:39,085 INFO L413 NwaCegarLoop]: 618 mSDtfsCounter, 282 mSDsluCounter, 1696 mSDsCounter, 0 mSdLazyCounter, 163 mSolverCounterSat, 148 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 282 SdHoareTripleChecker+Valid, 2314 SdHoareTripleChecker+Invalid, 311 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 148 IncrementalHoareTripleChecker+Valid, 163 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-02 18:48:39,086 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [282 Valid, 2314 Invalid, 311 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [148 Valid, 163 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-02 18:48:39,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 490 states. [2023-12-02 18:48:39,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 490 to 380. [2023-12-02 18:48:39,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 380 states, 257 states have (on average 1.5719844357976653) internal successors, (404), 276 states have internal predecessors, (404), 98 states have call successors, (98), 25 states have call predecessors, (98), 24 states have return successors, (93), 91 states have call predecessors, (93), 93 states have call successors, (93) [2023-12-02 18:48:39,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 380 states to 380 states and 595 transitions. [2023-12-02 18:48:39,168 INFO L78 Accepts]: Start accepts. Automaton has 380 states and 595 transitions. Word has length 76 [2023-12-02 18:48:39,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:48:39,169 INFO L495 AbstractCegarLoop]: Abstraction has 380 states and 595 transitions. [2023-12-02 18:48:39,169 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.4) internal successors, (47), 5 states have internal predecessors, (47), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2023-12-02 18:48:39,169 INFO L276 IsEmpty]: Start isEmpty. Operand 380 states and 595 transitions. [2023-12-02 18:48:39,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2023-12-02 18:48:39,175 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:48:39,175 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 18:48:39,175 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-12-02 18:48:39,175 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 18:48:39,176 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:48:39,176 INFO L85 PathProgramCache]: Analyzing trace with hash -67014492, now seen corresponding path program 1 times [2023-12-02 18:48:39,176 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 18:48:39,177 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [860327591] [2023-12-02 18:48:39,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:48:39,177 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 18:48:39,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:48:39,714 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-12-02 18:48:39,714 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 18:48:39,715 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [860327591] [2023-12-02 18:48:39,715 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [860327591] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 18:48:39,715 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 18:48:39,715 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-12-02 18:48:39,716 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1766235644] [2023-12-02 18:48:39,716 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 18:48:39,717 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-12-02 18:48:39,717 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 18:48:39,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-12-02 18:48:39,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2023-12-02 18:48:39,719 INFO L87 Difference]: Start difference. First operand 380 states and 595 transitions. Second operand has 9 states, 9 states have (on average 5.222222222222222) internal successors, (47), 9 states have internal predecessors, (47), 6 states have call successors, (15), 3 states have call predecessors, (15), 4 states have return successors, (14), 6 states have call predecessors, (14), 5 states have call successors, (14) [2023-12-02 18:48:42,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:48:42,618 INFO L93 Difference]: Finished difference Result 1287 states and 2054 transitions. [2023-12-02 18:48:42,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-12-02 18:48:42,619 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.222222222222222) internal successors, (47), 9 states have internal predecessors, (47), 6 states have call successors, (15), 3 states have call predecessors, (15), 4 states have return successors, (14), 6 states have call predecessors, (14), 5 states have call successors, (14) Word has length 79 [2023-12-02 18:48:42,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:48:42,628 INFO L225 Difference]: With dead ends: 1287 [2023-12-02 18:48:42,628 INFO L226 Difference]: Without dead ends: 930 [2023-12-02 18:48:42,631 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=115, Invalid=437, Unknown=0, NotChecked=0, Total=552 [2023-12-02 18:48:42,632 INFO L413 NwaCegarLoop]: 395 mSDtfsCounter, 1740 mSDsluCounter, 2083 mSDsCounter, 0 mSdLazyCounter, 3578 mSolverCounterSat, 554 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1805 SdHoareTripleChecker+Valid, 2478 SdHoareTripleChecker+Invalid, 4132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 554 IncrementalHoareTripleChecker+Valid, 3578 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2023-12-02 18:48:42,633 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1805 Valid, 2478 Invalid, 4132 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [554 Valid, 3578 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2023-12-02 18:48:42,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 930 states. [2023-12-02 18:48:42,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 930 to 874. [2023-12-02 18:48:42,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 874 states, 614 states have (on average 1.5944625407166124) internal successors, (979), 645 states have internal predecessors, (979), 206 states have call successors, (206), 49 states have call predecessors, (206), 53 states have return successors, (213), 204 states have call predecessors, (213), 201 states have call successors, (213) [2023-12-02 18:48:42,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 874 states to 874 states and 1398 transitions. [2023-12-02 18:48:42,725 INFO L78 Accepts]: Start accepts. Automaton has 874 states and 1398 transitions. Word has length 79 [2023-12-02 18:48:42,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:48:42,725 INFO L495 AbstractCegarLoop]: Abstraction has 874 states and 1398 transitions. [2023-12-02 18:48:42,726 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.222222222222222) internal successors, (47), 9 states have internal predecessors, (47), 6 states have call successors, (15), 3 states have call predecessors, (15), 4 states have return successors, (14), 6 states have call predecessors, (14), 5 states have call successors, (14) [2023-12-02 18:48:42,726 INFO L276 IsEmpty]: Start isEmpty. Operand 874 states and 1398 transitions. [2023-12-02 18:48:42,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2023-12-02 18:48:42,730 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:48:42,730 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 18:48:42,730 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-12-02 18:48:42,730 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 18:48:42,731 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:48:42,731 INFO L85 PathProgramCache]: Analyzing trace with hash -1659199173, now seen corresponding path program 1 times [2023-12-02 18:48:42,731 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 18:48:42,732 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [901376978] [2023-12-02 18:48:42,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:48:42,732 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 18:48:42,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:48:43,116 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-12-02 18:48:43,117 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 18:48:43,117 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [901376978] [2023-12-02 18:48:43,117 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [901376978] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 18:48:43,117 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 18:48:43,118 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-12-02 18:48:43,118 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [262710119] [2023-12-02 18:48:43,118 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 18:48:43,119 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-02 18:48:43,119 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 18:48:43,120 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-02 18:48:43,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-12-02 18:48:43,120 INFO L87 Difference]: Start difference. First operand 874 states and 1398 transitions. Second operand has 7 states, 7 states have (on average 7.142857142857143) internal successors, (50), 5 states have internal predecessors, (50), 2 states have call successors, (16), 2 states have call predecessors, (16), 4 states have return successors, (15), 4 states have call predecessors, (15), 2 states have call successors, (15) [2023-12-02 18:48:43,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:48:43,360 INFO L93 Difference]: Finished difference Result 1477 states and 2374 transitions. [2023-12-02 18:48:43,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-12-02 18:48:43,361 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.142857142857143) internal successors, (50), 5 states have internal predecessors, (50), 2 states have call successors, (16), 2 states have call predecessors, (16), 4 states have return successors, (15), 4 states have call predecessors, (15), 2 states have call successors, (15) Word has length 84 [2023-12-02 18:48:43,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:48:43,370 INFO L225 Difference]: With dead ends: 1477 [2023-12-02 18:48:43,370 INFO L226 Difference]: Without dead ends: 963 [2023-12-02 18:48:43,373 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-12-02 18:48:43,375 INFO L413 NwaCegarLoop]: 603 mSDtfsCounter, 42 mSDsluCounter, 2940 mSDsCounter, 0 mSdLazyCounter, 259 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 3543 SdHoareTripleChecker+Invalid, 261 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 259 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 18:48:43,375 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 3543 Invalid, 261 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 259 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-02 18:48:43,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 963 states. [2023-12-02 18:48:43,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 963 to 895. [2023-12-02 18:48:43,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 895 states, 629 states have (on average 1.5802861685214626) internal successors, (994), 660 states have internal predecessors, (994), 206 states have call successors, (206), 49 states have call predecessors, (206), 59 states have return successors, (228), 210 states have call predecessors, (228), 201 states have call successors, (228) [2023-12-02 18:48:43,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 895 states to 895 states and 1428 transitions. [2023-12-02 18:48:43,472 INFO L78 Accepts]: Start accepts. Automaton has 895 states and 1428 transitions. Word has length 84 [2023-12-02 18:48:43,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:48:43,473 INFO L495 AbstractCegarLoop]: Abstraction has 895 states and 1428 transitions. [2023-12-02 18:48:43,473 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.142857142857143) internal successors, (50), 5 states have internal predecessors, (50), 2 states have call successors, (16), 2 states have call predecessors, (16), 4 states have return successors, (15), 4 states have call predecessors, (15), 2 states have call successors, (15) [2023-12-02 18:48:43,473 INFO L276 IsEmpty]: Start isEmpty. Operand 895 states and 1428 transitions. [2023-12-02 18:48:43,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2023-12-02 18:48:43,477 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:48:43,477 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 18:48:43,477 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-12-02 18:48:43,478 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 18:48:43,478 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:48:43,478 INFO L85 PathProgramCache]: Analyzing trace with hash -229814340, now seen corresponding path program 1 times [2023-12-02 18:48:43,479 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 18:48:43,479 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1700767764] [2023-12-02 18:48:43,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:48:43,479 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 18:48:43,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:48:43,799 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-12-02 18:48:43,799 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 18:48:43,799 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1700767764] [2023-12-02 18:48:43,799 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1700767764] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 18:48:43,800 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 18:48:43,800 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-12-02 18:48:43,800 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1808307409] [2023-12-02 18:48:43,800 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 18:48:43,801 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-02 18:48:43,801 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 18:48:43,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-02 18:48:43,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-12-02 18:48:43,802 INFO L87 Difference]: Start difference. First operand 895 states and 1428 transitions. Second operand has 7 states, 7 states have (on average 7.0) internal successors, (49), 5 states have internal predecessors, (49), 2 states have call successors, (16), 2 states have call predecessors, (16), 4 states have return successors, (15), 4 states have call predecessors, (15), 2 states have call successors, (15) [2023-12-02 18:48:44,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:48:44,053 INFO L93 Difference]: Finished difference Result 1506 states and 2412 transitions. [2023-12-02 18:48:44,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-12-02 18:48:44,054 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.0) internal successors, (49), 5 states have internal predecessors, (49), 2 states have call successors, (16), 2 states have call predecessors, (16), 4 states have return successors, (15), 4 states have call predecessors, (15), 2 states have call successors, (15) Word has length 83 [2023-12-02 18:48:44,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:48:44,064 INFO L225 Difference]: With dead ends: 1506 [2023-12-02 18:48:44,064 INFO L226 Difference]: Without dead ends: 978 [2023-12-02 18:48:44,068 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-12-02 18:48:44,069 INFO L413 NwaCegarLoop]: 606 mSDtfsCounter, 41 mSDsluCounter, 2951 mSDsCounter, 0 mSdLazyCounter, 260 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 3557 SdHoareTripleChecker+Invalid, 262 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 260 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 18:48:44,070 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 3557 Invalid, 262 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 260 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-02 18:48:44,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 978 states. [2023-12-02 18:48:44,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 978 to 898. [2023-12-02 18:48:44,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 898 states, 632 states have (on average 1.5775316455696202) internal successors, (997), 660 states have internal predecessors, (997), 206 states have call successors, (206), 49 states have call predecessors, (206), 59 states have return successors, (228), 213 states have call predecessors, (228), 201 states have call successors, (228) [2023-12-02 18:48:44,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 898 states to 898 states and 1431 transitions. [2023-12-02 18:48:44,156 INFO L78 Accepts]: Start accepts. Automaton has 898 states and 1431 transitions. Word has length 83 [2023-12-02 18:48:44,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:48:44,157 INFO L495 AbstractCegarLoop]: Abstraction has 898 states and 1431 transitions. [2023-12-02 18:48:44,157 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.0) internal successors, (49), 5 states have internal predecessors, (49), 2 states have call successors, (16), 2 states have call predecessors, (16), 4 states have return successors, (15), 4 states have call predecessors, (15), 2 states have call successors, (15) [2023-12-02 18:48:44,158 INFO L276 IsEmpty]: Start isEmpty. Operand 898 states and 1431 transitions. [2023-12-02 18:48:44,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2023-12-02 18:48:44,161 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:48:44,161 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 18:48:44,162 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-12-02 18:48:44,162 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 18:48:44,162 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:48:44,162 INFO L85 PathProgramCache]: Analyzing trace with hash 463826715, now seen corresponding path program 1 times [2023-12-02 18:48:44,162 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 18:48:44,163 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1419824023] [2023-12-02 18:48:44,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:48:44,163 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 18:48:44,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:48:44,471 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-12-02 18:48:44,471 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 18:48:44,471 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1419824023] [2023-12-02 18:48:44,471 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1419824023] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 18:48:44,472 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 18:48:44,472 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-12-02 18:48:44,472 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [772134403] [2023-12-02 18:48:44,472 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 18:48:44,473 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-02 18:48:44,473 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 18:48:44,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-02 18:48:44,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-12-02 18:48:44,474 INFO L87 Difference]: Start difference. First operand 898 states and 1431 transitions. Second operand has 7 states, 7 states have (on average 7.142857142857143) internal successors, (50), 5 states have internal predecessors, (50), 2 states have call successors, (16), 2 states have call predecessors, (16), 4 states have return successors, (15), 4 states have call predecessors, (15), 2 states have call successors, (15) [2023-12-02 18:48:44,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:48:44,703 INFO L93 Difference]: Finished difference Result 1511 states and 2417 transitions. [2023-12-02 18:48:44,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-12-02 18:48:44,704 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.142857142857143) internal successors, (50), 5 states have internal predecessors, (50), 2 states have call successors, (16), 2 states have call predecessors, (16), 4 states have return successors, (15), 4 states have call predecessors, (15), 2 states have call successors, (15) Word has length 84 [2023-12-02 18:48:44,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:48:44,712 INFO L225 Difference]: With dead ends: 1511 [2023-12-02 18:48:44,712 INFO L226 Difference]: Without dead ends: 981 [2023-12-02 18:48:44,715 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-12-02 18:48:44,716 INFO L413 NwaCegarLoop]: 603 mSDtfsCounter, 42 mSDsluCounter, 2940 mSDsCounter, 0 mSdLazyCounter, 259 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 3543 SdHoareTripleChecker+Invalid, 261 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 259 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 18:48:44,717 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 3543 Invalid, 261 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 259 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-02 18:48:44,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 981 states. [2023-12-02 18:48:44,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 981 to 901. [2023-12-02 18:48:44,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 901 states, 635 states have (on average 1.5748031496062993) internal successors, (1000), 660 states have internal predecessors, (1000), 206 states have call successors, (206), 49 states have call predecessors, (206), 59 states have return successors, (228), 216 states have call predecessors, (228), 201 states have call successors, (228) [2023-12-02 18:48:44,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 901 states to 901 states and 1434 transitions. [2023-12-02 18:48:44,798 INFO L78 Accepts]: Start accepts. Automaton has 901 states and 1434 transitions. Word has length 84 [2023-12-02 18:48:44,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:48:44,798 INFO L495 AbstractCegarLoop]: Abstraction has 901 states and 1434 transitions. [2023-12-02 18:48:44,799 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.142857142857143) internal successors, (50), 5 states have internal predecessors, (50), 2 states have call successors, (16), 2 states have call predecessors, (16), 4 states have return successors, (15), 4 states have call predecessors, (15), 2 states have call successors, (15) [2023-12-02 18:48:44,799 INFO L276 IsEmpty]: Start isEmpty. Operand 901 states and 1434 transitions. [2023-12-02 18:48:44,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2023-12-02 18:48:44,802 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:48:44,802 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 18:48:44,802 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-12-02 18:48:44,803 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 18:48:44,803 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:48:44,803 INFO L85 PathProgramCache]: Analyzing trace with hash 837166515, now seen corresponding path program 1 times [2023-12-02 18:48:44,803 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 18:48:44,804 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [9104081] [2023-12-02 18:48:44,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:48:44,804 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 18:48:44,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:48:45,112 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-12-02 18:48:45,112 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 18:48:45,112 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [9104081] [2023-12-02 18:48:45,112 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [9104081] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 18:48:45,113 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 18:48:45,113 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-12-02 18:48:45,113 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [976528175] [2023-12-02 18:48:45,113 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 18:48:45,113 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-12-02 18:48:45,113 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 18:48:45,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-12-02 18:48:45,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-12-02 18:48:45,115 INFO L87 Difference]: Start difference. First operand 901 states and 1434 transitions. Second operand has 8 states, 8 states have (on average 6.75) internal successors, (54), 8 states have internal predecessors, (54), 7 states have call successors, (16), 4 states have call predecessors, (16), 3 states have return successors, (15), 7 states have call predecessors, (15), 6 states have call successors, (15) [2023-12-02 18:48:47,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:48:47,146 INFO L93 Difference]: Finished difference Result 2053 states and 3286 transitions. [2023-12-02 18:48:47,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-12-02 18:48:47,147 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.75) internal successors, (54), 8 states have internal predecessors, (54), 7 states have call successors, (16), 4 states have call predecessors, (16), 3 states have return successors, (15), 7 states have call predecessors, (15), 6 states have call successors, (15) Word has length 88 [2023-12-02 18:48:47,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:48:47,159 INFO L225 Difference]: With dead ends: 2053 [2023-12-02 18:48:47,159 INFO L226 Difference]: Without dead ends: 1400 [2023-12-02 18:48:47,164 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2023-12-02 18:48:47,165 INFO L413 NwaCegarLoop]: 511 mSDtfsCounter, 2362 mSDsluCounter, 879 mSDsCounter, 0 mSdLazyCounter, 1995 mSolverCounterSat, 992 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2526 SdHoareTripleChecker+Valid, 1390 SdHoareTripleChecker+Invalid, 2987 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 992 IncrementalHoareTripleChecker+Valid, 1995 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2023-12-02 18:48:47,165 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2526 Valid, 1390 Invalid, 2987 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [992 Valid, 1995 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2023-12-02 18:48:47,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1400 states. [2023-12-02 18:48:47,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1400 to 1302. [2023-12-02 18:48:47,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1302 states, 904 states have (on average 1.5342920353982301) internal successors, (1387), 944 states have internal predecessors, (1387), 306 states have call successors, (306), 77 states have call predecessors, (306), 91 states have return successors, (346), 317 states have call predecessors, (346), 301 states have call successors, (346) [2023-12-02 18:48:47,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1302 states to 1302 states and 2039 transitions. [2023-12-02 18:48:47,261 INFO L78 Accepts]: Start accepts. Automaton has 1302 states and 2039 transitions. Word has length 88 [2023-12-02 18:48:47,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:48:47,262 INFO L495 AbstractCegarLoop]: Abstraction has 1302 states and 2039 transitions. [2023-12-02 18:48:47,262 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.75) internal successors, (54), 8 states have internal predecessors, (54), 7 states have call successors, (16), 4 states have call predecessors, (16), 3 states have return successors, (15), 7 states have call predecessors, (15), 6 states have call successors, (15) [2023-12-02 18:48:47,262 INFO L276 IsEmpty]: Start isEmpty. Operand 1302 states and 2039 transitions. [2023-12-02 18:48:47,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2023-12-02 18:48:47,265 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:48:47,265 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 18:48:47,265 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-12-02 18:48:47,265 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 18:48:47,266 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:48:47,266 INFO L85 PathProgramCache]: Analyzing trace with hash -1209892621, now seen corresponding path program 1 times [2023-12-02 18:48:47,266 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 18:48:47,266 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1598183060] [2023-12-02 18:48:47,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:48:47,266 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 18:48:47,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:48:47,538 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-12-02 18:48:47,538 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 18:48:47,539 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1598183060] [2023-12-02 18:48:47,539 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1598183060] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 18:48:47,539 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 18:48:47,539 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-12-02 18:48:47,539 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1120036521] [2023-12-02 18:48:47,539 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 18:48:47,540 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-02 18:48:47,540 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 18:48:47,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-02 18:48:47,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-12-02 18:48:47,541 INFO L87 Difference]: Start difference. First operand 1302 states and 2039 transitions. Second operand has 6 states, 6 states have (on average 9.5) internal successors, (57), 6 states have internal predecessors, (57), 4 states have call successors, (16), 2 states have call predecessors, (16), 4 states have return successors, (15), 4 states have call predecessors, (15), 4 states have call successors, (15) [2023-12-02 18:48:47,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:48:47,871 INFO L93 Difference]: Finished difference Result 2584 states and 4121 transitions. [2023-12-02 18:48:47,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-12-02 18:48:47,871 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.5) internal successors, (57), 6 states have internal predecessors, (57), 4 states have call successors, (16), 2 states have call predecessors, (16), 4 states have return successors, (15), 4 states have call predecessors, (15), 4 states have call successors, (15) Word has length 91 [2023-12-02 18:48:47,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:48:47,884 INFO L225 Difference]: With dead ends: 2584 [2023-12-02 18:48:47,884 INFO L226 Difference]: Without dead ends: 1506 [2023-12-02 18:48:47,892 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 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 18:48:47,893 INFO L413 NwaCegarLoop]: 575 mSDtfsCounter, 246 mSDsluCounter, 2068 mSDsCounter, 0 mSdLazyCounter, 312 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 259 SdHoareTripleChecker+Valid, 2643 SdHoareTripleChecker+Invalid, 335 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 312 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 18:48:47,893 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [259 Valid, 2643 Invalid, 335 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 312 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-02 18:48:47,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1506 states. [2023-12-02 18:48:47,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1506 to 1506. [2023-12-02 18:48:47,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1506 states, 1092 states have (on average 1.5393772893772895) internal successors, (1681), 1138 states have internal predecessors, (1681), 311 states have call successors, (311), 82 states have call predecessors, (311), 102 states have return successors, (351), 322 states have call predecessors, (351), 306 states have call successors, (351) [2023-12-02 18:48:47,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1506 states to 1506 states and 2343 transitions. [2023-12-02 18:48:47,999 INFO L78 Accepts]: Start accepts. Automaton has 1506 states and 2343 transitions. Word has length 91 [2023-12-02 18:48:48,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:48:48,000 INFO L495 AbstractCegarLoop]: Abstraction has 1506 states and 2343 transitions. [2023-12-02 18:48:48,000 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.5) internal successors, (57), 6 states have internal predecessors, (57), 4 states have call successors, (16), 2 states have call predecessors, (16), 4 states have return successors, (15), 4 states have call predecessors, (15), 4 states have call successors, (15) [2023-12-02 18:48:48,000 INFO L276 IsEmpty]: Start isEmpty. Operand 1506 states and 2343 transitions. [2023-12-02 18:48:48,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2023-12-02 18:48:48,003 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:48:48,003 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 18:48:48,003 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-12-02 18:48:48,003 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 18:48:48,004 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:48:48,004 INFO L85 PathProgramCache]: Analyzing trace with hash -157968719, now seen corresponding path program 1 times [2023-12-02 18:48:48,004 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 18:48:48,004 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1589801229] [2023-12-02 18:48:48,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:48:48,005 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 18:48:48,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:48:49,202 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-12-02 18:48:49,202 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 18:48:49,202 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1589801229] [2023-12-02 18:48:49,203 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1589801229] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 18:48:49,203 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 18:48:49,203 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-12-02 18:48:49,203 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2071178016] [2023-12-02 18:48:49,203 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 18:48:49,204 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-02 18:48:49,204 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 18:48:49,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-02 18:48:49,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-12-02 18:48:49,205 INFO L87 Difference]: Start difference. First operand 1506 states and 2343 transitions. Second operand has 7 states, 7 states have (on average 8.142857142857142) internal successors, (57), 7 states have internal predecessors, (57), 6 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 6 states have call predecessors, (15), 5 states have call successors, (15) [2023-12-02 18:48:52,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:48:52,414 INFO L93 Difference]: Finished difference Result 6018 states and 9554 transitions. [2023-12-02 18:48:52,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-12-02 18:48:52,415 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 8.142857142857142) internal successors, (57), 7 states have internal predecessors, (57), 6 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 6 states have call predecessors, (15), 5 states have call successors, (15) Word has length 91 [2023-12-02 18:48:52,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:48:52,438 INFO L225 Difference]: With dead ends: 6018 [2023-12-02 18:48:52,438 INFO L226 Difference]: Without dead ends: 4248 [2023-12-02 18:48:52,445 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2023-12-02 18:48:52,446 INFO L413 NwaCegarLoop]: 504 mSDtfsCounter, 2565 mSDsluCounter, 894 mSDsCounter, 0 mSdLazyCounter, 2348 mSolverCounterSat, 1161 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2637 SdHoareTripleChecker+Valid, 1398 SdHoareTripleChecker+Invalid, 3509 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1161 IncrementalHoareTripleChecker+Valid, 2348 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2023-12-02 18:48:52,446 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2637 Valid, 1398 Invalid, 3509 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1161 Valid, 2348 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2023-12-02 18:48:52,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4248 states. [2023-12-02 18:48:52,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4248 to 3957. [2023-12-02 18:48:52,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3957 states, 2834 states have (on average 1.514820042342978) internal successors, (4293), 2966 states have internal predecessors, (4293), 854 states have call successors, (854), 216 states have call predecessors, (854), 268 states have return successors, (1017), 865 states have call predecessors, (1017), 849 states have call successors, (1017) [2023-12-02 18:48:52,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3957 states to 3957 states and 6164 transitions. [2023-12-02 18:48:52,804 INFO L78 Accepts]: Start accepts. Automaton has 3957 states and 6164 transitions. Word has length 91 [2023-12-02 18:48:52,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:48:52,805 INFO L495 AbstractCegarLoop]: Abstraction has 3957 states and 6164 transitions. [2023-12-02 18:48:52,805 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.142857142857142) internal successors, (57), 7 states have internal predecessors, (57), 6 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 6 states have call predecessors, (15), 5 states have call successors, (15) [2023-12-02 18:48:52,805 INFO L276 IsEmpty]: Start isEmpty. Operand 3957 states and 6164 transitions. [2023-12-02 18:48:52,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2023-12-02 18:48:52,808 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:48:52,808 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 18:48:52,808 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-12-02 18:48:52,808 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 18:48:52,809 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:48:52,809 INFO L85 PathProgramCache]: Analyzing trace with hash 880233906, now seen corresponding path program 1 times [2023-12-02 18:48:52,809 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 18:48:52,809 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [699793195] [2023-12-02 18:48:52,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:48:52,809 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 18:48:52,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:48:53,022 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-12-02 18:48:53,022 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 18:48:53,022 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [699793195] [2023-12-02 18:48:53,023 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [699793195] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 18:48:53,023 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 18:48:53,023 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-12-02 18:48:53,023 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1494935273] [2023-12-02 18:48:53,023 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 18:48:53,023 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-02 18:48:53,024 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 18:48:53,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-02 18:48:53,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-12-02 18:48:53,025 INFO L87 Difference]: Start difference. First operand 3957 states and 6164 transitions. Second operand has 7 states, 7 states have (on average 8.142857142857142) internal successors, (57), 7 states have internal predecessors, (57), 5 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 5 states have call predecessors, (16), 4 states have call successors, (16) [2023-12-02 18:48:54,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:48:54,889 INFO L93 Difference]: Finished difference Result 7517 states and 11784 transitions. [2023-12-02 18:48:54,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-12-02 18:48:54,890 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 8.142857142857142) internal successors, (57), 7 states have internal predecessors, (57), 5 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 5 states have call predecessors, (16), 4 states have call successors, (16) Word has length 93 [2023-12-02 18:48:54,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:48:54,918 INFO L225 Difference]: With dead ends: 7517 [2023-12-02 18:48:54,918 INFO L226 Difference]: Without dead ends: 4463 [2023-12-02 18:48:54,932 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2023-12-02 18:48:54,932 INFO L413 NwaCegarLoop]: 378 mSDtfsCounter, 997 mSDsluCounter, 1230 mSDsCounter, 0 mSdLazyCounter, 2243 mSolverCounterSat, 399 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1073 SdHoareTripleChecker+Valid, 1608 SdHoareTripleChecker+Invalid, 2642 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 399 IncrementalHoareTripleChecker+Valid, 2243 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2023-12-02 18:48:54,933 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1073 Valid, 1608 Invalid, 2642 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [399 Valid, 2243 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2023-12-02 18:48:54,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4463 states. [2023-12-02 18:48:55,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4463 to 4038. [2023-12-02 18:48:55,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4038 states, 2888 states have (on average 1.509349030470914) internal successors, (4359), 3032 states have internal predecessors, (4359), 857 states have call successors, (857), 231 states have call predecessors, (857), 292 states have return successors, (1050), 865 states have call predecessors, (1050), 852 states have call successors, (1050) [2023-12-02 18:48:55,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4038 states to 4038 states and 6266 transitions. [2023-12-02 18:48:55,405 INFO L78 Accepts]: Start accepts. Automaton has 4038 states and 6266 transitions. Word has length 93 [2023-12-02 18:48:55,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:48:55,405 INFO L495 AbstractCegarLoop]: Abstraction has 4038 states and 6266 transitions. [2023-12-02 18:48:55,405 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.142857142857142) internal successors, (57), 7 states have internal predecessors, (57), 5 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 5 states have call predecessors, (16), 4 states have call successors, (16) [2023-12-02 18:48:55,406 INFO L276 IsEmpty]: Start isEmpty. Operand 4038 states and 6266 transitions. [2023-12-02 18:48:55,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2023-12-02 18:48:55,409 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:48:55,409 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 18:48:55,409 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-12-02 18:48:55,409 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 18:48:55,410 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:48:55,410 INFO L85 PathProgramCache]: Analyzing trace with hash -214094587, now seen corresponding path program 1 times [2023-12-02 18:48:55,410 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 18:48:55,410 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1409807147] [2023-12-02 18:48:55,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:48:55,410 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 18:48:55,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:48:55,658 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-12-02 18:48:55,659 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 18:48:55,659 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1409807147] [2023-12-02 18:48:55,659 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1409807147] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 18:48:55,659 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 18:48:55,659 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-12-02 18:48:55,659 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [468173383] [2023-12-02 18:48:55,660 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 18:48:55,660 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-02 18:48:55,660 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 18:48:55,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-02 18:48:55,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-12-02 18:48:55,661 INFO L87 Difference]: Start difference. First operand 4038 states and 6266 transitions. Second operand has 6 states, 6 states have (on average 9.5) internal successors, (57), 6 states have internal predecessors, (57), 3 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (17), 3 states have call predecessors, (17), 2 states have call successors, (17) [2023-12-02 18:48:56,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:48:56,428 INFO L93 Difference]: Finished difference Result 4142 states and 6428 transitions. [2023-12-02 18:48:56,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-02 18:48:56,428 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.5) internal successors, (57), 6 states have internal predecessors, (57), 3 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (17), 3 states have call predecessors, (17), 2 states have call successors, (17) Word has length 96 [2023-12-02 18:48:56,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:48:56,448 INFO L225 Difference]: With dead ends: 4142 [2023-12-02 18:48:56,448 INFO L226 Difference]: Without dead ends: 4127 [2023-12-02 18:48:56,451 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-12-02 18:48:56,451 INFO L413 NwaCegarLoop]: 548 mSDtfsCounter, 685 mSDsluCounter, 1277 mSDsCounter, 0 mSdLazyCounter, 542 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 686 SdHoareTripleChecker+Valid, 1825 SdHoareTripleChecker+Invalid, 564 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 542 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-02 18:48:56,451 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [686 Valid, 1825 Invalid, 564 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 542 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-02 18:48:56,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4127 states. [2023-12-02 18:48:56,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4127 to 4044. [2023-12-02 18:48:56,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4044 states, 2894 states have (on average 1.508293020041465) internal successors, (4365), 3038 states have internal predecessors, (4365), 857 states have call successors, (857), 231 states have call predecessors, (857), 292 states have return successors, (1050), 865 states have call predecessors, (1050), 852 states have call successors, (1050) [2023-12-02 18:48:56,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4044 states to 4044 states and 6272 transitions. [2023-12-02 18:48:56,891 INFO L78 Accepts]: Start accepts. Automaton has 4044 states and 6272 transitions. Word has length 96 [2023-12-02 18:48:56,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:48:56,891 INFO L495 AbstractCegarLoop]: Abstraction has 4044 states and 6272 transitions. [2023-12-02 18:48:56,891 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.5) internal successors, (57), 6 states have internal predecessors, (57), 3 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (17), 3 states have call predecessors, (17), 2 states have call successors, (17) [2023-12-02 18:48:56,891 INFO L276 IsEmpty]: Start isEmpty. Operand 4044 states and 6272 transitions. [2023-12-02 18:48:56,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2023-12-02 18:48:56,893 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:48:56,894 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 18:48:56,894 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-12-02 18:48:56,894 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 18:48:56,894 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:48:56,894 INFO L85 PathProgramCache]: Analyzing trace with hash 600343808, now seen corresponding path program 1 times [2023-12-02 18:48:56,894 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 18:48:56,895 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1448958068] [2023-12-02 18:48:56,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:48:56,895 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 18:48:56,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:48:57,118 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-12-02 18:48:57,119 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 18:48:57,119 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1448958068] [2023-12-02 18:48:57,119 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1448958068] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 18:48:57,119 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 18:48:57,119 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-12-02 18:48:57,119 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1372219892] [2023-12-02 18:48:57,119 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 18:48:57,120 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-12-02 18:48:57,120 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 18:48:57,120 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-12-02 18:48:57,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2023-12-02 18:48:57,121 INFO L87 Difference]: Start difference. First operand 4044 states and 6272 transitions. Second operand has 9 states, 8 states have (on average 7.5) internal successors, (60), 8 states have internal predecessors, (60), 5 states have call successors, (19), 2 states have call predecessors, (19), 5 states have return successors, (18), 6 states have call predecessors, (18), 4 states have call successors, (18) [2023-12-02 18:48:57,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:48:57,608 INFO L93 Difference]: Finished difference Result 4209 states and 6525 transitions. [2023-12-02 18:48:57,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-12-02 18:48:57,609 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 7.5) internal successors, (60), 8 states have internal predecessors, (60), 5 states have call successors, (19), 2 states have call predecessors, (19), 5 states have return successors, (18), 6 states have call predecessors, (18), 4 states have call successors, (18) Word has length 101 [2023-12-02 18:48:57,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:48:57,631 INFO L225 Difference]: With dead ends: 4209 [2023-12-02 18:48:57,631 INFO L226 Difference]: Without dead ends: 4050 [2023-12-02 18:48:57,634 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2023-12-02 18:48:57,635 INFO L413 NwaCegarLoop]: 535 mSDtfsCounter, 350 mSDsluCounter, 3519 mSDsCounter, 0 mSdLazyCounter, 472 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 357 SdHoareTripleChecker+Valid, 4054 SdHoareTripleChecker+Invalid, 511 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 472 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 18:48:57,635 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [357 Valid, 4054 Invalid, 511 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 472 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-02 18:48:57,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4050 states. [2023-12-02 18:48:57,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4050 to 4044. [2023-12-02 18:48:57,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4044 states, 2894 states have (on average 1.4944713199723565) internal successors, (4325), 3038 states have internal predecessors, (4325), 857 states have call successors, (857), 231 states have call predecessors, (857), 292 states have return successors, (1050), 865 states have call predecessors, (1050), 852 states have call successors, (1050) [2023-12-02 18:48:57,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4044 states to 4044 states and 6232 transitions. [2023-12-02 18:48:57,982 INFO L78 Accepts]: Start accepts. Automaton has 4044 states and 6232 transitions. Word has length 101 [2023-12-02 18:48:57,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:48:57,983 INFO L495 AbstractCegarLoop]: Abstraction has 4044 states and 6232 transitions. [2023-12-02 18:48:57,984 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 7.5) internal successors, (60), 8 states have internal predecessors, (60), 5 states have call successors, (19), 2 states have call predecessors, (19), 5 states have return successors, (18), 6 states have call predecessors, (18), 4 states have call successors, (18) [2023-12-02 18:48:57,984 INFO L276 IsEmpty]: Start isEmpty. Operand 4044 states and 6232 transitions. [2023-12-02 18:48:57,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2023-12-02 18:48:57,987 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:48:57,987 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 18:48:57,988 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-12-02 18:48:57,988 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 18:48:57,988 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:48:57,988 INFO L85 PathProgramCache]: Analyzing trace with hash 986884524, now seen corresponding path program 1 times [2023-12-02 18:48:57,988 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 18:48:57,988 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [581182172] [2023-12-02 18:48:57,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:48:57,989 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 18:48:58,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:48:58,461 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-12-02 18:48:58,461 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 18:48:58,461 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [581182172] [2023-12-02 18:48:58,461 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [581182172] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 18:48:58,461 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 18:48:58,461 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-12-02 18:48:58,462 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [457369934] [2023-12-02 18:48:58,462 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 18:48:58,462 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-12-02 18:48:58,462 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 18:48:58,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-12-02 18:48:58,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-12-02 18:48:58,463 INFO L87 Difference]: Start difference. First operand 4044 states and 6232 transitions. Second operand has 8 states, 8 states have (on average 8.125) internal successors, (65), 7 states have internal predecessors, (65), 6 states have call successors, (20), 4 states have call predecessors, (20), 2 states have return successors, (19), 5 states have call predecessors, (19), 5 states have call successors, (19) [2023-12-02 18:49:01,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:49:01,730 INFO L93 Difference]: Finished difference Result 14751 states and 23122 transitions. [2023-12-02 18:49:01,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-12-02 18:49:01,731 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 8.125) internal successors, (65), 7 states have internal predecessors, (65), 6 states have call successors, (20), 4 states have call predecessors, (20), 2 states have return successors, (19), 5 states have call predecessors, (19), 5 states have call successors, (19) Word has length 109 [2023-12-02 18:49:01,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:49:01,770 INFO L225 Difference]: With dead ends: 14751 [2023-12-02 18:49:01,771 INFO L226 Difference]: Without dead ends: 10730 [2023-12-02 18:49:01,783 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2023-12-02 18:49:01,784 INFO L413 NwaCegarLoop]: 501 mSDtfsCounter, 2745 mSDsluCounter, 965 mSDsCounter, 0 mSdLazyCounter, 2659 mSolverCounterSat, 1021 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2853 SdHoareTripleChecker+Valid, 1466 SdHoareTripleChecker+Invalid, 3680 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1021 IncrementalHoareTripleChecker+Valid, 2659 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2023-12-02 18:49:01,784 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2853 Valid, 1466 Invalid, 3680 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1021 Valid, 2659 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2023-12-02 18:49:01,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10730 states. [2023-12-02 18:49:02,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10730 to 9477. [2023-12-02 18:49:02,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9477 states, 6733 states have (on average 1.5061636714688846) internal successors, (10141), 7100 states have internal predecessors, (10141), 2111 states have call successors, (2111), 497 states have call predecessors, (2111), 632 states have return successors, (2538), 2016 states have call predecessors, (2538), 2106 states have call successors, (2538) [2023-12-02 18:49:02,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9477 states to 9477 states and 14790 transitions. [2023-12-02 18:49:02,664 INFO L78 Accepts]: Start accepts. Automaton has 9477 states and 14790 transitions. Word has length 109 [2023-12-02 18:49:02,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:49:02,664 INFO L495 AbstractCegarLoop]: Abstraction has 9477 states and 14790 transitions. [2023-12-02 18:49:02,664 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.125) internal successors, (65), 7 states have internal predecessors, (65), 6 states have call successors, (20), 4 states have call predecessors, (20), 2 states have return successors, (19), 5 states have call predecessors, (19), 5 states have call successors, (19) [2023-12-02 18:49:02,664 INFO L276 IsEmpty]: Start isEmpty. Operand 9477 states and 14790 transitions. [2023-12-02 18:49:02,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2023-12-02 18:49:02,669 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:49:02,669 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-12-02 18:49:02,669 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-12-02 18:49:02,669 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 18:49:02,670 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:49:02,670 INFO L85 PathProgramCache]: Analyzing trace with hash -1200483762, now seen corresponding path program 1 times [2023-12-02 18:49:02,670 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 18:49:02,670 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1333905311] [2023-12-02 18:49:02,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:49:02,670 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 18:49:02,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:49:04,037 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-12-02 18:49:04,037 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 18:49:04,037 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1333905311] [2023-12-02 18:49:04,037 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1333905311] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 18:49:04,037 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1534851738] [2023-12-02 18:49:04,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:49:04,038 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:49:04,038 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73fd5982-3c43-445e-bd00-ee8817abc353/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 18:49:04,042 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73fd5982-3c43-445e-bd00-ee8817abc353/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 18:49:04,044 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73fd5982-3c43-445e-bd00-ee8817abc353/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-12-02 18:49:04,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:49:04,385 INFO L262 TraceCheckSpWp]: Trace formula consists of 1848 conjuncts, 23 conjunts are in the unsatisfiable core [2023-12-02 18:49:04,397 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:49:06,692 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-02 18:49:06,692 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 18:49:39,191 WARN L293 SmtUtils]: Spent 32.30s on a formula simplification. DAG size of input: 766 DAG size of output: 43 (called from [L 279] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2023-12-02 18:50:13,609 WARN L293 SmtUtils]: Spent 31.27s on a formula simplification. DAG size of input: 766 DAG size of output: 43 (called from [L 279] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2023-12-02 18:50:44,511 WARN L293 SmtUtils]: Spent 30.54s on a formula simplification. DAG size of input: 766 DAG size of output: 43 (called from [L 279] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2023-12-02 18:50:44,600 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-12-02 18:50:44,600 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1534851738] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 18:50:44,600 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [110957145] [2023-12-02 18:50:44,622 INFO L159 IcfgInterpreter]: Started Sifa with 101 locations of interest [2023-12-02 18:50:44,622 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 18:50:44,625 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 18:50:44,629 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 18:50:44,629 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 18:51:02,212 INFO L197 IcfgInterpreter]: Interpreting procedure cleanup with input of size 580 for LOIs [2023-12-02 18:51:25,633 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 580 for LOIs [2023-12-02 18:52:24,760 INFO L197 IcfgInterpreter]: Interpreting procedure stopRequestedInDirection with input of size 441 for LOIs [2023-12-02 18:52:28,881 INFO L197 IcfgInterpreter]: Interpreting procedure stopRequestedInDirection__wrappee__weight with input of size 441 for LOIs [2023-12-02 18:52:37,210 INFO L197 IcfgInterpreter]: Interpreting procedure isFloorCalling with input of size 55 for LOIs [2023-12-02 18:52:37,242 INFO L197 IcfgInterpreter]: Interpreting procedure buttonForFloorIsPressed with input of size 437 for LOIs [2023-12-02 18:52:37,680 INFO L197 IcfgInterpreter]: Interpreting procedure getCurrentFloorID with input of size 595 for LOIs [2023-12-02 18:52:40,414 INFO L197 IcfgInterpreter]: Interpreting procedure bigMacCall with input of size 587 for LOIs [2023-12-02 18:52:53,835 INFO L197 IcfgInterpreter]: Interpreting procedure isBlocked with input of size 469 for LOIs [2023-12-02 18:52:54,558 INFO L197 IcfgInterpreter]: Interpreting procedure continueInDirection with input of size 447 for LOIs [2023-12-02 18:52:58,899 INFO L197 IcfgInterpreter]: Interpreting procedure isTopFloor with input of size 449 for LOIs [2023-12-02 18:53:00,147 INFO L197 IcfgInterpreter]: Interpreting procedure angelinaCall with input of size 550 for LOIs [2023-12-02 18:53:11,615 INFO L197 IcfgInterpreter]: Interpreting procedure initPersonOnFloor with input of size 642 for LOIs [2023-12-02 18:53:16,539 INFO L197 IcfgInterpreter]: Interpreting procedure getOrigin with input of size 519 for LOIs [2023-12-02 18:53:18,353 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 18:53:38,350 WARN L293 SmtUtils]: Spent 6.65s on a formula simplification. DAG size of input: 563 DAG size of output: 529 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 18:54:01,418 WARN L293 SmtUtils]: Spent 12.63s on a formula simplification. DAG size of input: 642 DAG size of output: 602 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 18:55:43,098 WARN L293 SmtUtils]: Spent 5.21s on a formula simplification. DAG size of input: 461 DAG size of output: 443 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 18:56:43,750 WARN L293 SmtUtils]: Spent 10.25s on a formula simplification. DAG size of input: 639 DAG size of output: 632 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 18:56:55,129 WARN L293 SmtUtils]: Spent 10.42s on a formula simplification. DAG size of input: 595 DAG size of output: 587 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 18:57:06,900 WARN L293 SmtUtils]: Spent 10.75s on a formula simplification. DAG size of input: 599 DAG size of output: 591 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 18:57:18,152 WARN L293 SmtUtils]: Spent 10.36s on a formula simplification. DAG size of input: 641 DAG size of output: 634 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 18:57:29,815 WARN L293 SmtUtils]: Spent 10.73s on a formula simplification. DAG size of input: 646 DAG size of output: 639 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 18:57:41,569 WARN L293 SmtUtils]: Spent 10.78s on a formula simplification. DAG size of input: 648 DAG size of output: 641 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 18:57:53,394 WARN L293 SmtUtils]: Spent 10.78s on a formula simplification. DAG size of input: 650 DAG size of output: 643 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 18:58:04,827 WARN L293 SmtUtils]: Spent 10.36s on a formula simplification. DAG size of input: 652 DAG size of output: 645 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 18:58:16,141 WARN L293 SmtUtils]: Spent 10.26s on a formula simplification. DAG size of input: 654 DAG size of output: 624 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 18:58:27,594 WARN L293 SmtUtils]: Spent 10.33s on a formula simplification. DAG size of input: 656 DAG size of output: 626 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 18:58:39,540 WARN L293 SmtUtils]: Spent 10.91s on a formula simplification. DAG size of input: 656 DAG size of output: 626 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 18:59:21,380 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [110957145] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 18:59:21,380 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2023-12-02 18:59:21,380 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [72] imperfect sequences [20, 12, 12] total 107 [2023-12-02 18:59:21,380 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [305638247] [2023-12-02 18:59:21,380 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 18:59:21,381 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 72 states [2023-12-02 18:59:21,381 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 18:59:21,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2023-12-02 18:59:21,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1156, Invalid=10186, Unknown=0, NotChecked=0, Total=11342 [2023-12-02 18:59:21,388 INFO L87 Difference]: Start difference. First operand 9477 states and 14790 transitions. Second operand has 72 states, 58 states have (on average 1.1379310344827587) internal successors, (66), 47 states have internal predecessors, (66), 20 states have call successors, (20), 14 states have call predecessors, (20), 14 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) [2023-12-02 18:59:38,050 WARN L293 SmtUtils]: Spent 5.15s on a formula simplification. DAG size of input: 639 DAG size of output: 591 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 19:00:54,063 WARN L293 SmtUtils]: Spent 5.67s on a formula simplification. DAG size of input: 704 DAG size of output: 679 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 19:01:02,292 WARN L293 SmtUtils]: Spent 5.08s on a formula simplification. DAG size of input: 641 DAG size of output: 612 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 19:02:10,710 WARN L293 SmtUtils]: Spent 13.83s on a formula simplification. DAG size of input: 594 DAG size of output: 593 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 19:02:18,991 WARN L293 SmtUtils]: Spent 7.76s on a formula simplification. DAG size of input: 636 DAG size of output: 600 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 19:02:33,266 WARN L293 SmtUtils]: Spent 14.00s on a formula simplification. DAG size of input: 606 DAG size of output: 606 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)