./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/elevator_spec1_product17.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 30e01a73 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_13d065f5-aeb4-44be-a787-c7016129cc23/bin/utaipan-verify-mE87zJ7Ire/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13d065f5-aeb4-44be-a787-c7016129cc23/bin/utaipan-verify-mE87zJ7Ire/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13d065f5-aeb4-44be-a787-c7016129cc23/bin/utaipan-verify-mE87zJ7Ire/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13d065f5-aeb4-44be-a787-c7016129cc23/bin/utaipan-verify-mE87zJ7Ire/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec1_product17.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13d065f5-aeb4-44be-a787-c7016129cc23/bin/utaipan-verify-mE87zJ7Ire/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13d065f5-aeb4-44be-a787-c7016129cc23/bin/utaipan-verify-mE87zJ7Ire --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 09d600be73ca435c113b9c0e8e087d96a910d62ea2126c235d6963c00b3a91c2 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-30e01a7 [2023-11-23 21:09:20,820 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-23 21:09:20,891 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13d065f5-aeb4-44be-a787-c7016129cc23/bin/utaipan-verify-mE87zJ7Ire/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-11-23 21:09:20,897 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-23 21:09:20,898 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-23 21:09:20,930 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-23 21:09:20,931 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-23 21:09:20,932 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-23 21:09:20,932 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-23 21:09:20,933 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-23 21:09:20,934 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-23 21:09:20,934 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-23 21:09:20,937 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-23 21:09:20,942 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-23 21:09:20,942 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-23 21:09:20,943 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-23 21:09:20,944 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-23 21:09:20,945 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-23 21:09:20,945 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-23 21:09:20,946 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-23 21:09:20,946 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-23 21:09:20,947 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-23 21:09:20,948 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-23 21:09:20,948 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-23 21:09:20,949 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-23 21:09:20,949 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-23 21:09:20,950 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-23 21:09:20,950 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-23 21:09:20,950 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-23 21:09:20,951 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-23 21:09:20,952 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-23 21:09:20,952 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-23 21:09:20,953 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-23 21:09:20,953 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-23 21:09:20,953 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-23 21:09:20,953 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-23 21:09:20,954 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-23 21:09:20,954 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 21:09:20,954 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-23 21:09:20,954 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-23 21:09:20,955 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-23 21:09:20,956 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-23 21:09:20,956 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-23 21:09:20,956 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-23 21:09:20,957 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-23 21:09:20,957 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-23 21:09:20,957 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-23 21:09:20,957 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_13d065f5-aeb4-44be-a787-c7016129cc23/bin/utaipan-verify-mE87zJ7Ire/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13d065f5-aeb4-44be-a787-c7016129cc23/bin/utaipan-verify-mE87zJ7Ire Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 09d600be73ca435c113b9c0e8e087d96a910d62ea2126c235d6963c00b3a91c2 [2023-11-23 21:09:21,236 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-23 21:09:21,282 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-23 21:09:21,294 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-23 21:09:21,301 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-23 21:09:21,302 INFO L274 PluginConnector]: CDTParser initialized [2023-11-23 21:09:21,303 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13d065f5-aeb4-44be-a787-c7016129cc23/bin/utaipan-verify-mE87zJ7Ire/../../sv-benchmarks/c/product-lines/elevator_spec1_product17.cil.c [2023-11-23 21:09:24,452 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-23 21:09:24,837 INFO L384 CDTParser]: Found 1 translation units. [2023-11-23 21:09:24,837 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13d065f5-aeb4-44be-a787-c7016129cc23/sv-benchmarks/c/product-lines/elevator_spec1_product17.cil.c [2023-11-23 21:09:24,870 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13d065f5-aeb4-44be-a787-c7016129cc23/bin/utaipan-verify-mE87zJ7Ire/data/794a67ffa/b5efedbd621e43e5949a6bd82a2a30d2/FLAGa30d37093 [2023-11-23 21:09:24,887 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13d065f5-aeb4-44be-a787-c7016129cc23/bin/utaipan-verify-mE87zJ7Ire/data/794a67ffa/b5efedbd621e43e5949a6bd82a2a30d2 [2023-11-23 21:09:24,895 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-23 21:09:24,897 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-23 21:09:24,930 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-23 21:09:24,930 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-23 21:09:24,936 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-23 21:09:24,937 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 09:09:24" (1/1) ... [2023-11-23 21:09:24,938 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@ca57042 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:09:24, skipping insertion in model container [2023-11-23 21:09:24,938 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 09:09:24" (1/1) ... [2023-11-23 21:09:25,055 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-23 21:09:25,412 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_13d065f5-aeb4-44be-a787-c7016129cc23/sv-benchmarks/c/product-lines/elevator_spec1_product17.cil.c[27470,27483] [2023-11-23 21:09:25,711 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 21:09:25,730 INFO L202 MainTranslator]: Completed pre-run [2023-11-23 21:09:25,742 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Floor.i","") [48] [2023-11-23 21:09:25,743 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"libacc.i","") [721] [2023-11-23 21:09:25,744 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"scenario.i","") [1087] [2023-11-23 21:09:25,744 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"wsllib_check.i","") [1103] [2023-11-23 21:09:25,744 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"featureselect.i","") [1112] [2023-11-23 21:09:25,745 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Elevator.i","") [1150] [2023-11-23 21:09:25,745 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Specification1_spec.i","") [2604] [2023-11-23 21:09:25,746 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"UnitTests.i","") [2785] [2023-11-23 21:09:25,746 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Test.i","") [2878] [2023-11-23 21:09:25,747 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Person.i","") [3228] [2023-11-23 21:09:25,830 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_13d065f5-aeb4-44be-a787-c7016129cc23/sv-benchmarks/c/product-lines/elevator_spec1_product17.cil.c[27470,27483] [2023-11-23 21:09:25,924 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 21:09:25,960 INFO L206 MainTranslator]: Completed translation [2023-11-23 21:09:25,960 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:09:25 WrapperNode [2023-11-23 21:09:25,960 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-23 21:09:25,962 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-23 21:09:25,962 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-23 21:09:25,962 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-23 21:09:25,970 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:09:25" (1/1) ... [2023-11-23 21:09:26,028 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:09:25" (1/1) ... [2023-11-23 21:09:26,113 INFO L138 Inliner]: procedures = 90, calls = 333, calls flagged for inlining = 25, calls inlined = 22, statements flattened = 790 [2023-11-23 21:09:26,114 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-23 21:09:26,115 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-23 21:09:26,115 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-23 21:09:26,115 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-23 21:09:26,142 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:09:25" (1/1) ... [2023-11-23 21:09:26,142 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:09:25" (1/1) ... [2023-11-23 21:09:26,148 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:09:25" (1/1) ... [2023-11-23 21:09:26,149 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:09:25" (1/1) ... [2023-11-23 21:09:26,172 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:09:25" (1/1) ... [2023-11-23 21:09:26,200 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:09:25" (1/1) ... [2023-11-23 21:09:26,205 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:09:25" (1/1) ... [2023-11-23 21:09:26,227 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:09:25" (1/1) ... [2023-11-23 21:09:26,236 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-23 21:09:26,237 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-23 21:09:26,237 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-23 21:09:26,237 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-23 21:09:26,240 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:09:25" (1/1) ... [2023-11-23 21:09:26,246 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 21:09:26,258 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13d065f5-aeb4-44be-a787-c7016129cc23/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:09:26,271 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13d065f5-aeb4-44be-a787-c7016129cc23/bin/utaipan-verify-mE87zJ7Ire/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-23 21:09:26,305 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13d065f5-aeb4-44be-a787-c7016129cc23/bin/utaipan-verify-mE87zJ7Ire/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-23 21:09:26,321 INFO L130 BoogieDeclarations]: Found specification of procedure angelinaCall [2023-11-23 21:09:26,321 INFO L138 BoogieDeclarations]: Found implementation of procedure angelinaCall [2023-11-23 21:09:26,321 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-23 21:09:26,321 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2023-11-23 21:09:26,322 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2023-11-23 21:09:26,322 INFO L130 BoogieDeclarations]: Found specification of procedure bigMacCall [2023-11-23 21:09:26,322 INFO L138 BoogieDeclarations]: Found implementation of procedure bigMacCall [2023-11-23 21:09:26,322 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2023-11-23 21:09:26,322 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2023-11-23 21:09:26,322 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2023-11-23 21:09:26,322 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2023-11-23 21:09:26,323 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2023-11-23 21:09:26,323 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2023-11-23 21:09:26,323 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2023-11-23 21:09:26,323 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2023-11-23 21:09:26,323 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2023-11-23 21:09:26,323 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2023-11-23 21:09:26,324 INFO L130 BoogieDeclarations]: Found specification of procedure areDoorsOpen [2023-11-23 21:09:26,324 INFO L138 BoogieDeclarations]: Found implementation of procedure areDoorsOpen [2023-11-23 21:09:26,324 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2023-11-23 21:09:26,324 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2023-11-23 21:09:26,324 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2023-11-23 21:09:26,324 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2023-11-23 21:09:26,324 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2023-11-23 21:09:26,325 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2023-11-23 21:09:26,325 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2023-11-23 21:09:26,325 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2023-11-23 21:09:26,325 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2023-11-23 21:09:26,325 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2023-11-23 21:09:26,325 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2023-11-23 21:09:26,325 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2023-11-23 21:09:26,325 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2023-11-23 21:09:26,326 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2023-11-23 21:09:26,326 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2023-11-23 21:09:26,326 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2023-11-23 21:09:26,326 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2023-11-23 21:09:26,326 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2023-11-23 21:09:26,326 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-23 21:09:26,326 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2023-11-23 21:09:26,327 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2023-11-23 21:09:26,327 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2023-11-23 21:09:26,327 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2023-11-23 21:09:26,327 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2023-11-23 21:09:26,327 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2023-11-23 21:09:26,327 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-23 21:09:26,327 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-23 21:09:26,327 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2023-11-23 21:09:26,328 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2023-11-23 21:09:26,485 INFO L241 CfgBuilder]: Building ICFG [2023-11-23 21:09:26,488 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-23 21:09:27,712 INFO L282 CfgBuilder]: Performing block encoding [2023-11-23 21:09:28,868 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-23 21:09:28,869 INFO L309 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-23 21:09:28,871 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 09:09:28 BoogieIcfgContainer [2023-11-23 21:09:28,871 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-23 21:09:28,875 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-23 21:09:28,875 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-23 21:09:28,879 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-23 21:09:28,879 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 09:09:24" (1/3) ... [2023-11-23 21:09:28,880 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@61226713 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 09:09:28, skipping insertion in model container [2023-11-23 21:09:28,881 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:09:25" (2/3) ... [2023-11-23 21:09:28,882 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@61226713 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 09:09:28, skipping insertion in model container [2023-11-23 21:09:28,883 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 09:09:28" (3/3) ... [2023-11-23 21:09:28,884 INFO L112 eAbstractionObserver]: Analyzing ICFG elevator_spec1_product17.cil.c [2023-11-23 21:09:28,907 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-23 21:09:28,907 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-23 21:09:29,001 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-23 21:09:29,009 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;@16a39846, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-23 21:09:29,009 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-23 21:09:29,018 INFO L276 IsEmpty]: Start isEmpty. Operand has 354 states, 239 states have (on average 1.6150627615062763) internal successors, (386), 260 states have internal predecessors, (386), 91 states have call successors, (91), 22 states have call predecessors, (91), 22 states have return successors, (91), 85 states have call predecessors, (91), 91 states have call successors, (91) [2023-11-23 21:09:29,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2023-11-23 21:09:29,055 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:09:29,056 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] [2023-11-23 21:09:29,057 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:09:29,065 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:09:29,065 INFO L85 PathProgramCache]: Analyzing trace with hash -1848822970, now seen corresponding path program 1 times [2023-11-23 21:09:29,074 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:09:29,075 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2020460662] [2023-11-23 21:09:29,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:09:29,075 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:09:29,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:09:30,195 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-23 21:09:30,196 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:09:30,196 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2020460662] [2023-11-23 21:09:30,198 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2020460662] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:09:30,198 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:09:30,198 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-23 21:09:30,200 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2006475660] [2023-11-23 21:09:30,201 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:09:30,207 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-23 21:09:30,207 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:09:30,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-23 21:09:30,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-23 21:09:30,251 INFO L87 Difference]: Start difference. First operand has 354 states, 239 states have (on average 1.6150627615062763) internal successors, (386), 260 states have internal predecessors, (386), 91 states have call successors, (91), 22 states have call predecessors, (91), 22 states have return successors, (91), 85 states have call predecessors, (91), 91 states have call successors, (91) Second operand has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 7 states have internal predecessors, (37), 5 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 5 states have call predecessors, (11), 4 states have call successors, (11) [2023-11-23 21:09:33,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:09:33,254 INFO L93 Difference]: Finished difference Result 1177 states and 1929 transitions. [2023-11-23 21:09:33,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-23 21:09:33,257 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 7 states have internal predecessors, (37), 5 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 5 states have call predecessors, (11), 4 states have call successors, (11) Word has length 62 [2023-11-23 21:09:33,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:09:33,284 INFO L225 Difference]: With dead ends: 1177 [2023-11-23 21:09:33,284 INFO L226 Difference]: Without dead ends: 840 [2023-11-23 21:09:33,293 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=67, Invalid=173, Unknown=0, NotChecked=0, Total=240 [2023-11-23 21:09:33,297 INFO L413 NwaCegarLoop]: 376 mSDtfsCounter, 1636 mSDsluCounter, 1272 mSDsCounter, 0 mSdLazyCounter, 2284 mSolverCounterSat, 487 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1699 SdHoareTripleChecker+Valid, 1648 SdHoareTripleChecker+Invalid, 2771 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 487 IncrementalHoareTripleChecker+Valid, 2284 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2023-11-23 21:09:33,298 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1699 Valid, 1648 Invalid, 2771 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [487 Valid, 2284 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2023-11-23 21:09:33,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 840 states. [2023-11-23 21:09:33,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 840 to 791. [2023-11-23 21:09:33,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 791 states, 558 states have (on average 1.636200716845878) internal successors, (913), 593 states have internal predecessors, (913), 188 states have call successors, (188), 42 states have call predecessors, (188), 44 states have return successors, (189), 180 states have call predecessors, (189), 183 states have call successors, (189) [2023-11-23 21:09:33,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 791 states to 791 states and 1290 transitions. [2023-11-23 21:09:33,473 INFO L78 Accepts]: Start accepts. Automaton has 791 states and 1290 transitions. Word has length 62 [2023-11-23 21:09:33,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:09:33,474 INFO L495 AbstractCegarLoop]: Abstraction has 791 states and 1290 transitions. [2023-11-23 21:09:33,474 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 7 states have internal predecessors, (37), 5 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 5 states have call predecessors, (11), 4 states have call successors, (11) [2023-11-23 21:09:33,475 INFO L276 IsEmpty]: Start isEmpty. Operand 791 states and 1290 transitions. [2023-11-23 21:09:33,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2023-11-23 21:09:33,480 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:09:33,481 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] [2023-11-23 21:09:33,481 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-23 21:09:33,482 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:09:33,483 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:09:33,483 INFO L85 PathProgramCache]: Analyzing trace with hash -38535152, now seen corresponding path program 1 times [2023-11-23 21:09:33,483 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:09:33,483 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [361250752] [2023-11-23 21:09:33,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:09:33,484 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:09:33,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:09:33,898 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-23 21:09:33,898 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:09:33,899 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [361250752] [2023-11-23 21:09:33,899 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [361250752] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:09:33,899 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:09:33,899 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-23 21:09:33,900 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [648302827] [2023-11-23 21:09:33,901 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:09:33,904 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-23 21:09:33,905 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:09:33,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-23 21:09:33,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-23 21:09:33,909 INFO L87 Difference]: Start difference. First operand 791 states and 1290 transitions. Second operand has 5 states, 5 states have (on average 8.0) internal successors, (40), 4 states have internal predecessors, (40), 2 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (12), 3 states have call predecessors, (12), 2 states have call successors, (12) [2023-11-23 21:09:34,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:09:34,175 INFO L93 Difference]: Finished difference Result 1327 states and 2172 transitions. [2023-11-23 21:09:34,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-23 21:09:34,177 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.0) internal successors, (40), 4 states have internal predecessors, (40), 2 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (12), 3 states have call predecessors, (12), 2 states have call successors, (12) Word has length 67 [2023-11-23 21:09:34,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:09:34,189 INFO L225 Difference]: With dead ends: 1327 [2023-11-23 21:09:34,194 INFO L226 Difference]: Without dead ends: 861 [2023-11-23 21:09:34,201 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-23 21:09:34,204 INFO L413 NwaCegarLoop]: 566 mSDtfsCounter, 41 mSDsluCounter, 1629 mSDsCounter, 0 mSdLazyCounter, 168 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 2195 SdHoareTripleChecker+Invalid, 170 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 168 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-23 21:09:34,205 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 2195 Invalid, 170 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 168 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-23 21:09:34,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 861 states. [2023-11-23 21:09:34,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 861 to 803. [2023-11-23 21:09:34,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 803 states, 567 states have (on average 1.6261022927689595) internal successors, (922), 602 states have internal predecessors, (922), 188 states have call successors, (188), 42 states have call predecessors, (188), 47 states have return successors, (195), 183 states have call predecessors, (195), 183 states have call successors, (195) [2023-11-23 21:09:34,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 803 states to 803 states and 1305 transitions. [2023-11-23 21:09:34,289 INFO L78 Accepts]: Start accepts. Automaton has 803 states and 1305 transitions. Word has length 67 [2023-11-23 21:09:34,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:09:34,290 INFO L495 AbstractCegarLoop]: Abstraction has 803 states and 1305 transitions. [2023-11-23 21:09:34,290 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.0) internal successors, (40), 4 states have internal predecessors, (40), 2 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (12), 3 states have call predecessors, (12), 2 states have call successors, (12) [2023-11-23 21:09:34,290 INFO L276 IsEmpty]: Start isEmpty. Operand 803 states and 1305 transitions. [2023-11-23 21:09:34,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2023-11-23 21:09:34,293 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:09:34,293 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] [2023-11-23 21:09:34,294 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-23 21:09:34,294 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:09:34,294 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:09:34,295 INFO L85 PathProgramCache]: Analyzing trace with hash -136083080, now seen corresponding path program 1 times [2023-11-23 21:09:34,295 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:09:34,295 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [355794226] [2023-11-23 21:09:34,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:09:34,295 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:09:34,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:09:34,815 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-23 21:09:34,815 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:09:34,816 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [355794226] [2023-11-23 21:09:34,816 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [355794226] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:09:34,817 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:09:34,817 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-23 21:09:34,818 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [509797560] [2023-11-23 21:09:34,818 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:09:34,818 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-23 21:09:34,819 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:09:34,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-23 21:09:34,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-11-23 21:09:34,820 INFO L87 Difference]: Start difference. First operand 803 states and 1305 transitions. Second operand has 8 states, 8 states have (on average 5.5) internal successors, (44), 8 states have internal predecessors, (44), 6 states have call successors, (13), 4 states have call predecessors, (13), 3 states have return successors, (12), 6 states have call predecessors, (12), 5 states have call successors, (12) [2023-11-23 21:09:37,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:09:37,138 INFO L93 Difference]: Finished difference Result 1822 states and 2958 transitions. [2023-11-23 21:09:37,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-23 21:09:37,139 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.5) internal successors, (44), 8 states have internal predecessors, (44), 6 states have call successors, (13), 4 states have call predecessors, (13), 3 states have return successors, (12), 6 states have call predecessors, (12), 5 states have call successors, (12) Word has length 71 [2023-11-23 21:09:37,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:09:37,149 INFO L225 Difference]: With dead ends: 1822 [2023-11-23 21:09:37,150 INFO L226 Difference]: Without dead ends: 1248 [2023-11-23 21:09:37,153 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 [2023-11-23 21:09:37,154 INFO L413 NwaCegarLoop]: 475 mSDtfsCounter, 1925 mSDsluCounter, 827 mSDsCounter, 0 mSdLazyCounter, 1880 mSolverCounterSat, 752 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2072 SdHoareTripleChecker+Valid, 1302 SdHoareTripleChecker+Invalid, 2632 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 752 IncrementalHoareTripleChecker+Valid, 1880 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2023-11-23 21:09:37,155 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2072 Valid, 1302 Invalid, 2632 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [752 Valid, 1880 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2023-11-23 21:09:37,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1248 states. [2023-11-23 21:09:37,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1248 to 1154. [2023-11-23 21:09:37,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1154 states, 803 states have (on average 1.5815691158156913) internal successors, (1270), 855 states have internal predecessors, (1270), 276 states have call successors, (276), 66 states have call predecessors, (276), 74 states have return successors, (292), 269 states have call predecessors, (292), 271 states have call successors, (292) [2023-11-23 21:09:37,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1154 states to 1154 states and 1838 transitions. [2023-11-23 21:09:37,271 INFO L78 Accepts]: Start accepts. Automaton has 1154 states and 1838 transitions. Word has length 71 [2023-11-23 21:09:37,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:09:37,272 INFO L495 AbstractCegarLoop]: Abstraction has 1154 states and 1838 transitions. [2023-11-23 21:09:37,272 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.5) internal successors, (44), 8 states have internal predecessors, (44), 6 states have call successors, (13), 4 states have call predecessors, (13), 3 states have return successors, (12), 6 states have call predecessors, (12), 5 states have call successors, (12) [2023-11-23 21:09:37,272 INFO L276 IsEmpty]: Start isEmpty. Operand 1154 states and 1838 transitions. [2023-11-23 21:09:37,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2023-11-23 21:09:37,275 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:09:37,276 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] [2023-11-23 21:09:37,276 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-23 21:09:37,276 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:09:37,277 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:09:37,277 INFO L85 PathProgramCache]: Analyzing trace with hash -1108812212, now seen corresponding path program 1 times [2023-11-23 21:09:37,277 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:09:37,278 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1127342427] [2023-11-23 21:09:37,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:09:37,278 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:09:37,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:09:37,620 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-23 21:09:37,621 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:09:37,621 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1127342427] [2023-11-23 21:09:37,621 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1127342427] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:09:37,621 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:09:37,621 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-23 21:09:37,622 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1934138838] [2023-11-23 21:09:37,622 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:09:37,624 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-23 21:09:37,624 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:09:37,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-23 21:09:37,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-23 21:09:37,625 INFO L87 Difference]: Start difference. First operand 1154 states and 1838 transitions. Second operand has 4 states, 4 states have (on average 11.75) internal successors, (47), 4 states have internal predecessors, (47), 3 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2023-11-23 21:09:37,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:09:37,972 INFO L93 Difference]: Finished difference Result 2223 states and 3599 transitions. [2023-11-23 21:09:37,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-23 21:09:37,973 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.75) internal successors, (47), 4 states have internal predecessors, (47), 3 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) Word has length 74 [2023-11-23 21:09:37,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:09:37,985 INFO L225 Difference]: With dead ends: 2223 [2023-11-23 21:09:37,985 INFO L226 Difference]: Without dead ends: 1154 [2023-11-23 21:09:37,991 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-23 21:09:37,993 INFO L413 NwaCegarLoop]: 549 mSDtfsCounter, 210 mSDsluCounter, 870 mSDsCounter, 0 mSdLazyCounter, 155 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 220 SdHoareTripleChecker+Valid, 1419 SdHoareTripleChecker+Invalid, 173 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 155 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-23 21:09:37,993 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [220 Valid, 1419 Invalid, 173 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 155 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-23 21:09:37,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1154 states. [2023-11-23 21:09:38,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1154 to 1154. [2023-11-23 21:09:38,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1154 states, 803 states have (on average 1.5417185554171855) internal successors, (1238), 855 states have internal predecessors, (1238), 276 states have call successors, (276), 66 states have call predecessors, (276), 74 states have return successors, (292), 269 states have call predecessors, (292), 271 states have call successors, (292) [2023-11-23 21:09:38,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1154 states to 1154 states and 1806 transitions. [2023-11-23 21:09:38,129 INFO L78 Accepts]: Start accepts. Automaton has 1154 states and 1806 transitions. Word has length 74 [2023-11-23 21:09:38,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:09:38,130 INFO L495 AbstractCegarLoop]: Abstraction has 1154 states and 1806 transitions. [2023-11-23 21:09:38,130 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.75) internal successors, (47), 4 states have internal predecessors, (47), 3 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2023-11-23 21:09:38,131 INFO L276 IsEmpty]: Start isEmpty. Operand 1154 states and 1806 transitions. [2023-11-23 21:09:38,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2023-11-23 21:09:38,134 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:09:38,134 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] [2023-11-23 21:09:38,135 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-23 21:09:38,135 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:09:38,136 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:09:38,136 INFO L85 PathProgramCache]: Analyzing trace with hash -741446209, now seen corresponding path program 1 times [2023-11-23 21:09:38,136 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:09:38,137 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [650470661] [2023-11-23 21:09:38,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:09:38,137 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:09:38,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:09:38,543 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-23 21:09:38,544 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:09:38,544 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [650470661] [2023-11-23 21:09:38,544 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [650470661] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:09:38,544 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:09:38,545 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-23 21:09:38,545 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [621721784] [2023-11-23 21:09:38,545 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:09:38,545 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-23 21:09:38,546 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:09:38,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-23 21:09:38,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-23 21:09:38,547 INFO L87 Difference]: Start difference. First operand 1154 states and 1806 transitions. Second operand has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 7 states have internal predecessors, (46), 4 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (13), 5 states have call predecessors, (13), 3 states have call successors, (13) [2023-11-23 21:09:40,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:09:40,730 INFO L93 Difference]: Finished difference Result 2210 states and 3477 transitions. [2023-11-23 21:09:40,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-23 21:09:40,731 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 7 states have internal predecessors, (46), 4 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (13), 5 states have call predecessors, (13), 3 states have call successors, (13) Word has length 76 [2023-11-23 21:09:40,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:09:40,749 INFO L225 Difference]: With dead ends: 2210 [2023-11-23 21:09:40,749 INFO L226 Difference]: Without dead ends: 1342 [2023-11-23 21:09:40,754 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2023-11-23 21:09:40,756 INFO L413 NwaCegarLoop]: 353 mSDtfsCounter, 923 mSDsluCounter, 1158 mSDsCounter, 0 mSdLazyCounter, 2057 mSolverCounterSat, 375 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 993 SdHoareTripleChecker+Valid, 1511 SdHoareTripleChecker+Invalid, 2432 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 375 IncrementalHoareTripleChecker+Valid, 2057 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2023-11-23 21:09:40,756 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [993 Valid, 1511 Invalid, 2432 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [375 Valid, 2057 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2023-11-23 21:09:40,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1342 states. [2023-11-23 21:09:40,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1342 to 1181. [2023-11-23 21:09:40,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1181 states, 821 states have (on average 1.5347137637028014) internal successors, (1260), 877 states have internal predecessors, (1260), 277 states have call successors, (277), 71 states have call predecessors, (277), 82 states have return successors, (303), 269 states have call predecessors, (303), 272 states have call successors, (303) [2023-11-23 21:09:40,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1181 states to 1181 states and 1840 transitions. [2023-11-23 21:09:40,902 INFO L78 Accepts]: Start accepts. Automaton has 1181 states and 1840 transitions. Word has length 76 [2023-11-23 21:09:40,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:09:40,905 INFO L495 AbstractCegarLoop]: Abstraction has 1181 states and 1840 transitions. [2023-11-23 21:09:40,905 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 7 states have internal predecessors, (46), 4 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (13), 5 states have call predecessors, (13), 3 states have call successors, (13) [2023-11-23 21:09:40,905 INFO L276 IsEmpty]: Start isEmpty. Operand 1181 states and 1840 transitions. [2023-11-23 21:09:40,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2023-11-23 21:09:40,908 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:09:40,908 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] [2023-11-23 21:09:40,908 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-23 21:09:40,908 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:09:40,909 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:09:40,909 INFO L85 PathProgramCache]: Analyzing trace with hash -740345125, now seen corresponding path program 1 times [2023-11-23 21:09:40,910 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:09:40,910 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1459800332] [2023-11-23 21:09:40,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:09:40,910 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:09:41,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:09:41,328 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-23 21:09:41,329 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:09:41,329 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1459800332] [2023-11-23 21:09:41,329 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1459800332] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:09:41,329 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:09:41,329 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-23 21:09:41,330 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2054329259] [2023-11-23 21:09:41,330 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:09:41,330 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-23 21:09:41,331 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:09:41,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-23 21:09:41,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-23 21:09:41,332 INFO L87 Difference]: Start difference. First operand 1181 states and 1840 transitions. Second operand has 6 states, 6 states have (on average 7.833333333333333) internal successors, (47), 6 states have internal predecessors, (47), 3 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 3 states have call predecessors, (15), 2 states have call successors, (15) [2023-11-23 21:09:42,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:09:42,104 INFO L93 Difference]: Finished difference Result 1253 states and 1953 transitions. [2023-11-23 21:09:42,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-23 21:09:42,105 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.833333333333333) internal successors, (47), 6 states have internal predecessors, (47), 3 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 3 states have call predecessors, (15), 2 states have call successors, (15) Word has length 83 [2023-11-23 21:09:42,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:09:42,119 INFO L225 Difference]: With dead ends: 1253 [2023-11-23 21:09:42,119 INFO L226 Difference]: Without dead ends: 1238 [2023-11-23 21:09:42,121 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 [2023-11-23 21:09:42,125 INFO L413 NwaCegarLoop]: 505 mSDtfsCounter, 640 mSDsluCounter, 1176 mSDsCounter, 0 mSdLazyCounter, 506 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 641 SdHoareTripleChecker+Valid, 1681 SdHoareTripleChecker+Invalid, 528 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 506 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-23 21:09:42,128 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [641 Valid, 1681 Invalid, 528 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 506 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-23 21:09:42,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1238 states. [2023-11-23 21:09:42,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1238 to 1185. [2023-11-23 21:09:42,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1185 states, 825 states have (on average 1.5321212121212122) internal successors, (1264), 881 states have internal predecessors, (1264), 277 states have call successors, (277), 71 states have call predecessors, (277), 82 states have return successors, (303), 269 states have call predecessors, (303), 272 states have call successors, (303) [2023-11-23 21:09:42,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1185 states to 1185 states and 1844 transitions. [2023-11-23 21:09:42,301 INFO L78 Accepts]: Start accepts. Automaton has 1185 states and 1844 transitions. Word has length 83 [2023-11-23 21:09:42,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:09:42,302 INFO L495 AbstractCegarLoop]: Abstraction has 1185 states and 1844 transitions. [2023-11-23 21:09:42,303 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.833333333333333) internal successors, (47), 6 states have internal predecessors, (47), 3 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 3 states have call predecessors, (15), 2 states have call successors, (15) [2023-11-23 21:09:42,303 INFO L276 IsEmpty]: Start isEmpty. Operand 1185 states and 1844 transitions. [2023-11-23 21:09:42,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2023-11-23 21:09:42,310 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:09:42,311 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] [2023-11-23 21:09:42,311 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-23 21:09:42,311 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:09:42,312 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:09:42,312 INFO L85 PathProgramCache]: Analyzing trace with hash -2020321711, now seen corresponding path program 1 times [2023-11-23 21:09:42,312 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:09:42,312 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [178284921] [2023-11-23 21:09:42,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:09:42,313 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:09:42,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:09:42,710 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-23 21:09:42,710 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:09:42,711 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [178284921] [2023-11-23 21:09:42,711 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [178284921] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:09:42,711 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:09:42,711 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-23 21:09:42,711 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1272197977] [2023-11-23 21:09:42,712 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:09:42,713 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-23 21:09:42,713 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:09:42,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-23 21:09:42,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-23 21:09:42,714 INFO L87 Difference]: Start difference. First operand 1185 states and 1844 transitions. Second operand has 5 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 2 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 3 states have call predecessors, (16), 1 states have call successors, (16) [2023-11-23 21:09:42,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:09:42,937 INFO L93 Difference]: Finished difference Result 1204 states and 1868 transitions. [2023-11-23 21:09:42,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-23 21:09:42,938 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 2 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 3 states have call predecessors, (16), 1 states have call successors, (16) Word has length 88 [2023-11-23 21:09:42,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:09:42,948 INFO L225 Difference]: With dead ends: 1204 [2023-11-23 21:09:42,948 INFO L226 Difference]: Without dead ends: 1189 [2023-11-23 21:09:42,950 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-23 21:09:42,951 INFO L413 NwaCegarLoop]: 515 mSDtfsCounter, 30 mSDsluCounter, 1509 mSDsCounter, 0 mSdLazyCounter, 138 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 2024 SdHoareTripleChecker+Invalid, 138 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 138 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 21:09:42,952 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 2024 Invalid, 138 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 138 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 21:09:42,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1189 states. [2023-11-23 21:09:43,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1189 to 1185. [2023-11-23 21:09:43,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1185 states, 825 states have (on average 1.5284848484848486) internal successors, (1261), 881 states have internal predecessors, (1261), 277 states have call successors, (277), 71 states have call predecessors, (277), 82 states have return successors, (303), 269 states have call predecessors, (303), 272 states have call successors, (303) [2023-11-23 21:09:43,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1185 states to 1185 states and 1841 transitions. [2023-11-23 21:09:43,135 INFO L78 Accepts]: Start accepts. Automaton has 1185 states and 1841 transitions. Word has length 88 [2023-11-23 21:09:43,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:09:43,135 INFO L495 AbstractCegarLoop]: Abstraction has 1185 states and 1841 transitions. [2023-11-23 21:09:43,136 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 2 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 3 states have call predecessors, (16), 1 states have call successors, (16) [2023-11-23 21:09:43,136 INFO L276 IsEmpty]: Start isEmpty. Operand 1185 states and 1841 transitions. [2023-11-23 21:09:43,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2023-11-23 21:09:43,140 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:09:43,140 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:09:43,140 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-23 21:09:43,140 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:09:43,141 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:09:43,141 INFO L85 PathProgramCache]: Analyzing trace with hash -936401938, now seen corresponding path program 1 times [2023-11-23 21:09:43,141 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:09:43,142 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [416694321] [2023-11-23 21:09:43,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:09:43,142 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:09:43,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:09:45,368 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-23 21:09:45,368 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:09:45,368 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [416694321] [2023-11-23 21:09:45,369 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [416694321] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:09:45,369 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:09:45,369 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2023-11-23 21:09:45,369 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1176504569] [2023-11-23 21:09:45,369 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:09:45,370 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-23 21:09:45,370 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:09:45,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-23 21:09:45,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2023-11-23 21:09:45,372 INFO L87 Difference]: Start difference. First operand 1185 states and 1841 transitions. Second operand has 14 states, 12 states have (on average 4.5) internal successors, (54), 11 states have internal predecessors, (54), 7 states have call successors, (18), 4 states have call predecessors, (18), 5 states have return successors, (17), 8 states have call predecessors, (17), 6 states have call successors, (17) [2023-11-23 21:09:50,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:09:50,619 INFO L93 Difference]: Finished difference Result 1690 states and 2654 transitions. [2023-11-23 21:09:50,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-11-23 21:09:50,620 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 12 states have (on average 4.5) internal successors, (54), 11 states have internal predecessors, (54), 7 states have call successors, (18), 4 states have call predecessors, (18), 5 states have return successors, (17), 8 states have call predecessors, (17), 6 states have call successors, (17) Word has length 95 [2023-11-23 21:09:50,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:09:50,636 INFO L225 Difference]: With dead ends: 1690 [2023-11-23 21:09:50,636 INFO L226 Difference]: Without dead ends: 1537 [2023-11-23 21:09:50,641 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 283 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=307, Invalid=1175, Unknown=0, NotChecked=0, Total=1482 [2023-11-23 21:09:50,642 INFO L413 NwaCegarLoop]: 372 mSDtfsCounter, 2577 mSDsluCounter, 2191 mSDsCounter, 0 mSdLazyCounter, 4493 mSolverCounterSat, 993 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2623 SdHoareTripleChecker+Valid, 2563 SdHoareTripleChecker+Invalid, 5486 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 993 IncrementalHoareTripleChecker+Valid, 4493 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2023-11-23 21:09:50,643 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2623 Valid, 2563 Invalid, 5486 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [993 Valid, 4493 Invalid, 0 Unknown, 0 Unchecked, 4.2s Time] [2023-11-23 21:09:50,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1537 states. [2023-11-23 21:09:50,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1537 to 1412. [2023-11-23 21:09:50,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1412 states, 994 states have (on average 1.529175050301811) internal successors, (1520), 1054 states have internal predecessors, (1520), 319 states have call successors, (319), 84 states have call predecessors, (319), 98 states have return successors, (361), 309 states have call predecessors, (361), 314 states have call successors, (361) [2023-11-23 21:09:50,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1412 states to 1412 states and 2200 transitions. [2023-11-23 21:09:50,815 INFO L78 Accepts]: Start accepts. Automaton has 1412 states and 2200 transitions. Word has length 95 [2023-11-23 21:09:50,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:09:50,816 INFO L495 AbstractCegarLoop]: Abstraction has 1412 states and 2200 transitions. [2023-11-23 21:09:50,816 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 12 states have (on average 4.5) internal successors, (54), 11 states have internal predecessors, (54), 7 states have call successors, (18), 4 states have call predecessors, (18), 5 states have return successors, (17), 8 states have call predecessors, (17), 6 states have call successors, (17) [2023-11-23 21:09:50,816 INFO L276 IsEmpty]: Start isEmpty. Operand 1412 states and 2200 transitions. [2023-11-23 21:09:50,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2023-11-23 21:09:50,819 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:09:50,819 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:09:50,820 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-23 21:09:50,820 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:09:50,821 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:09:50,821 INFO L85 PathProgramCache]: Analyzing trace with hash 194399540, now seen corresponding path program 1 times [2023-11-23 21:09:50,821 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:09:50,821 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [137731480] [2023-11-23 21:09:50,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:09:50,822 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:09:50,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:09:51,119 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-23 21:09:51,119 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:09:51,119 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [137731480] [2023-11-23 21:09:51,119 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [137731480] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:09:51,120 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:09:51,120 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-23 21:09:51,120 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [110284363] [2023-11-23 21:09:51,120 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:09:51,121 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-23 21:09:51,121 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:09:51,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-23 21:09:51,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-23 21:09:51,122 INFO L87 Difference]: Start difference. First operand 1412 states and 2200 transitions. Second operand has 5 states, 5 states have (on average 11.0) internal successors, (55), 5 states have internal predecessors, (55), 4 states have call successors, (18), 3 states have call predecessors, (18), 3 states have return successors, (17), 4 states have call predecessors, (17), 3 states have call successors, (17) [2023-11-23 21:09:53,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:09:53,269 INFO L93 Difference]: Finished difference Result 4520 states and 7148 transitions. [2023-11-23 21:09:53,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-23 21:09:53,270 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.0) internal successors, (55), 5 states have internal predecessors, (55), 4 states have call successors, (18), 3 states have call predecessors, (18), 3 states have return successors, (17), 4 states have call predecessors, (17), 3 states have call successors, (17) Word has length 96 [2023-11-23 21:09:53,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:09:53,299 INFO L225 Difference]: With dead ends: 4520 [2023-11-23 21:09:53,299 INFO L226 Difference]: Without dead ends: 3139 [2023-11-23 21:09:53,310 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-11-23 21:09:53,310 INFO L413 NwaCegarLoop]: 333 mSDtfsCounter, 1215 mSDsluCounter, 525 mSDsCounter, 0 mSdLazyCounter, 1553 mSolverCounterSat, 409 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1275 SdHoareTripleChecker+Valid, 858 SdHoareTripleChecker+Invalid, 1962 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 409 IncrementalHoareTripleChecker+Valid, 1553 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2023-11-23 21:09:53,311 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1275 Valid, 858 Invalid, 1962 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [409 Valid, 1553 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2023-11-23 21:09:53,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3139 states. [2023-11-23 21:09:53,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3139 to 2888. [2023-11-23 21:09:53,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2888 states, 2087 states have (on average 1.5409678965021563) internal successors, (3216), 2208 states have internal predecessors, (3216), 601 states have call successors, (601), 167 states have call predecessors, (601), 199 states have return successors, (718), 566 states have call predecessors, (718), 596 states have call successors, (718) [2023-11-23 21:09:53,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2888 states to 2888 states and 4535 transitions. [2023-11-23 21:09:53,724 INFO L78 Accepts]: Start accepts. Automaton has 2888 states and 4535 transitions. Word has length 96 [2023-11-23 21:09:53,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:09:53,725 INFO L495 AbstractCegarLoop]: Abstraction has 2888 states and 4535 transitions. [2023-11-23 21:09:53,725 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.0) internal successors, (55), 5 states have internal predecessors, (55), 4 states have call successors, (18), 3 states have call predecessors, (18), 3 states have return successors, (17), 4 states have call predecessors, (17), 3 states have call successors, (17) [2023-11-23 21:09:53,725 INFO L276 IsEmpty]: Start isEmpty. Operand 2888 states and 4535 transitions. [2023-11-23 21:09:53,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2023-11-23 21:09:53,729 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:09:53,729 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:09:53,729 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-23 21:09:53,730 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:09:53,735 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:09:53,735 INFO L85 PathProgramCache]: Analyzing trace with hash -1740505804, now seen corresponding path program 1 times [2023-11-23 21:09:53,735 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:09:53,735 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2111234898] [2023-11-23 21:09:53,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:09:53,736 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:09:53,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:09:55,579 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-23 21:09:55,579 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:09:55,579 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2111234898] [2023-11-23 21:09:55,580 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2111234898] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 21:09:55,580 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1120550350] [2023-11-23 21:09:55,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:09:55,580 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:09:55,581 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13d065f5-aeb4-44be-a787-c7016129cc23/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:09:55,583 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13d065f5-aeb4-44be-a787-c7016129cc23/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:09:55,622 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13d065f5-aeb4-44be-a787-c7016129cc23/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-23 21:09:56,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:09:56,056 INFO L262 TraceCheckSpWp]: Trace formula consists of 1817 conjuncts, 69 conjunts are in the unsatisfiable core [2023-11-23 21:09:56,079 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:09:57,068 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-11-23 21:09:57,068 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 21:09:57,069 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1120550350] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:09:57,069 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-23 21:09:57,069 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [15] total 22 [2023-11-23 21:09:57,069 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [925319543] [2023-11-23 21:09:57,070 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:09:57,070 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-23 21:09:57,070 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:09:57,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-23 21:09:57,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=393, Unknown=0, NotChecked=0, Total=462 [2023-11-23 21:09:57,072 INFO L87 Difference]: Start difference. First operand 2888 states and 4535 transitions. Second operand has 11 states, 7 states have (on average 8.285714285714286) internal successors, (58), 9 states have internal predecessors, (58), 6 states have call successors, (19), 3 states have call predecessors, (19), 5 states have return successors, (18), 5 states have call predecessors, (18), 5 states have call successors, (18) [2023-11-23 21:10:00,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:10:00,655 INFO L93 Difference]: Finished difference Result 5713 states and 9010 transitions. [2023-11-23 21:10:00,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-23 21:10:00,656 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 7 states have (on average 8.285714285714286) internal successors, (58), 9 states have internal predecessors, (58), 6 states have call successors, (19), 3 states have call predecessors, (19), 5 states have return successors, (18), 5 states have call predecessors, (18), 5 states have call successors, (18) Word has length 101 [2023-11-23 21:10:00,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:10:00,681 INFO L225 Difference]: With dead ends: 5713 [2023-11-23 21:10:00,681 INFO L226 Difference]: Without dead ends: 2850 [2023-11-23 21:10:00,698 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=155, Invalid=775, Unknown=0, NotChecked=0, Total=930 [2023-11-23 21:10:00,699 INFO L413 NwaCegarLoop]: 270 mSDtfsCounter, 1374 mSDsluCounter, 1300 mSDsCounter, 0 mSdLazyCounter, 3354 mSolverCounterSat, 724 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1374 SdHoareTripleChecker+Valid, 1570 SdHoareTripleChecker+Invalid, 4078 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 724 IncrementalHoareTripleChecker+Valid, 3354 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2023-11-23 21:10:00,700 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1374 Valid, 1570 Invalid, 4078 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [724 Valid, 3354 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2023-11-23 21:10:00,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2850 states. [2023-11-23 21:10:01,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2850 to 2836. [2023-11-23 21:10:01,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2836 states, 2053 states have (on average 1.5328787140769606) internal successors, (3147), 2173 states have internal predecessors, (3147), 583 states have call successors, (583), 167 states have call predecessors, (583), 199 states have return successors, (701), 549 states have call predecessors, (701), 579 states have call successors, (701) [2023-11-23 21:10:01,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2836 states to 2836 states and 4431 transitions. [2023-11-23 21:10:01,039 INFO L78 Accepts]: Start accepts. Automaton has 2836 states and 4431 transitions. Word has length 101 [2023-11-23 21:10:01,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:10:01,039 INFO L495 AbstractCegarLoop]: Abstraction has 2836 states and 4431 transitions. [2023-11-23 21:10:01,040 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 7 states have (on average 8.285714285714286) internal successors, (58), 9 states have internal predecessors, (58), 6 states have call successors, (19), 3 states have call predecessors, (19), 5 states have return successors, (18), 5 states have call predecessors, (18), 5 states have call successors, (18) [2023-11-23 21:10:01,040 INFO L276 IsEmpty]: Start isEmpty. Operand 2836 states and 4431 transitions. [2023-11-23 21:10:01,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2023-11-23 21:10:01,043 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:10:01,044 INFO L195 NwaCegarLoop]: trace histogram [4, 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] [2023-11-23 21:10:01,076 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13d065f5-aeb4-44be-a787-c7016129cc23/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-23 21:10:01,261 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13d065f5-aeb4-44be-a787-c7016129cc23/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:10:01,262 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:10:01,262 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:10:01,262 INFO L85 PathProgramCache]: Analyzing trace with hash 1628316526, now seen corresponding path program 1 times [2023-11-23 21:10:01,263 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:10:01,263 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1364737844] [2023-11-23 21:10:01,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:10:01,263 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:10:01,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:10:01,810 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-11-23 21:10:01,810 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:10:01,810 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1364737844] [2023-11-23 21:10:01,810 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1364737844] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:10:01,811 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:10:01,811 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-23 21:10:01,811 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [611232018] [2023-11-23 21:10:01,811 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:10:01,812 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-23 21:10:01,812 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:10:01,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-23 21:10:01,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-23 21:10:01,813 INFO L87 Difference]: Start difference. First operand 2836 states and 4431 transitions. Second operand has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 2 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (17), 2 states have call predecessors, (17), 1 states have call successors, (17) [2023-11-23 21:10:02,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:10:02,299 INFO L93 Difference]: Finished difference Result 2971 states and 4641 transitions. [2023-11-23 21:10:02,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-23 21:10:02,299 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 2 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (17), 2 states have call predecessors, (17), 1 states have call successors, (17) Word has length 99 [2023-11-23 21:10:02,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:10:02,325 INFO L225 Difference]: With dead ends: 2971 [2023-11-23 21:10:02,325 INFO L226 Difference]: Without dead ends: 2957 [2023-11-23 21:10:02,328 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-23 21:10:02,329 INFO L413 NwaCegarLoop]: 538 mSDtfsCounter, 44 mSDsluCounter, 1029 mSDsCounter, 0 mSdLazyCounter, 111 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 1567 SdHoareTripleChecker+Invalid, 123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 21:10:02,329 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 1567 Invalid, 123 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 111 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 21:10:02,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2957 states. [2023-11-23 21:10:02,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2957 to 2846. [2023-11-23 21:10:02,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2846 states, 2063 states have (on average 1.528841492971401) internal successors, (3154), 2183 states have internal predecessors, (3154), 583 states have call successors, (583), 167 states have call predecessors, (583), 199 states have return successors, (701), 549 states have call predecessors, (701), 579 states have call successors, (701) [2023-11-23 21:10:02,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2846 states to 2846 states and 4438 transitions. [2023-11-23 21:10:02,885 INFO L78 Accepts]: Start accepts. Automaton has 2846 states and 4438 transitions. Word has length 99 [2023-11-23 21:10:02,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:10:02,887 INFO L495 AbstractCegarLoop]: Abstraction has 2846 states and 4438 transitions. [2023-11-23 21:10:02,888 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 2 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (17), 2 states have call predecessors, (17), 1 states have call successors, (17) [2023-11-23 21:10:02,888 INFO L276 IsEmpty]: Start isEmpty. Operand 2846 states and 4438 transitions. [2023-11-23 21:10:02,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2023-11-23 21:10:02,893 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:10:02,894 INFO L195 NwaCegarLoop]: trace histogram [6, 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, 1, 1, 1, 1] [2023-11-23 21:10:02,894 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-11-23 21:10:02,894 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:10:02,895 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:10:02,895 INFO L85 PathProgramCache]: Analyzing trace with hash 1711413045, now seen corresponding path program 1 times [2023-11-23 21:10:02,895 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:10:02,895 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [541506031] [2023-11-23 21:10:02,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:10:02,896 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:10:02,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat