./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/elevator_spec14_product23.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24194dc6-540c-4f6f-906b-7c8c49351706/bin/utaipan-verify-SwPr7d2a91/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24194dc6-540c-4f6f-906b-7c8c49351706/bin/utaipan-verify-SwPr7d2a91/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24194dc6-540c-4f6f-906b-7c8c49351706/bin/utaipan-verify-SwPr7d2a91/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24194dc6-540c-4f6f-906b-7c8c49351706/bin/utaipan-verify-SwPr7d2a91/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec14_product23.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24194dc6-540c-4f6f-906b-7c8c49351706/bin/utaipan-verify-SwPr7d2a91/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24194dc6-540c-4f6f-906b-7c8c49351706/bin/utaipan-verify-SwPr7d2a91 --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 8e3e095c3e35754b69c5b770f69d2f55696576eebdd6e61f09ab7280f663a93f --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-25 00:03:16,744 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-25 00:03:16,845 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24194dc6-540c-4f6f-906b-7c8c49351706/bin/utaipan-verify-SwPr7d2a91/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-11-25 00:03:16,859 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-25 00:03:16,860 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-25 00:03:16,900 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-25 00:03:16,901 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-25 00:03:16,902 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-25 00:03:16,902 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-25 00:03:16,903 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-25 00:03:16,904 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-25 00:03:16,904 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-25 00:03:16,905 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-25 00:03:16,905 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-25 00:03:16,906 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-25 00:03:16,906 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-25 00:03:16,907 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-25 00:03:16,907 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-25 00:03:16,908 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-25 00:03:16,908 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-25 00:03:16,909 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-25 00:03:16,909 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-25 00:03:16,910 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-25 00:03:16,911 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-25 00:03:16,911 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-25 00:03:16,912 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-25 00:03:16,912 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-25 00:03:16,912 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-25 00:03:16,913 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-25 00:03:16,922 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-25 00:03:16,923 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-25 00:03:16,923 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-25 00:03:16,924 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-25 00:03:16,924 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-25 00:03:16,924 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-25 00:03:16,924 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-25 00:03:16,925 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-25 00:03:16,925 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-25 00:03:16,925 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-25 00:03:16,926 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-25 00:03:16,926 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-25 00:03:16,926 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-25 00:03:16,926 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-25 00:03:16,927 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-25 00:03:16,927 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-25 00:03:16,927 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-25 00:03:16,927 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-25 00:03:16,928 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_24194dc6-540c-4f6f-906b-7c8c49351706/bin/utaipan-verify-SwPr7d2a91/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24194dc6-540c-4f6f-906b-7c8c49351706/bin/utaipan-verify-SwPr7d2a91 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8e3e095c3e35754b69c5b770f69d2f55696576eebdd6e61f09ab7280f663a93f [2023-11-25 00:03:17,187 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-25 00:03:17,220 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-25 00:03:17,223 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-25 00:03:17,225 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-25 00:03:17,226 INFO L274 PluginConnector]: CDTParser initialized [2023-11-25 00:03:17,227 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24194dc6-540c-4f6f-906b-7c8c49351706/bin/utaipan-verify-SwPr7d2a91/../../sv-benchmarks/c/product-lines/elevator_spec14_product23.cil.c [2023-11-25 00:03:20,440 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-25 00:03:20,847 INFO L384 CDTParser]: Found 1 translation units. [2023-11-25 00:03:20,848 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24194dc6-540c-4f6f-906b-7c8c49351706/sv-benchmarks/c/product-lines/elevator_spec14_product23.cil.c [2023-11-25 00:03:20,873 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24194dc6-540c-4f6f-906b-7c8c49351706/bin/utaipan-verify-SwPr7d2a91/data/5fa8b9863/23a8011edd544c80bbd847849708c69a/FLAG44c8dabb7 [2023-11-25 00:03:20,888 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24194dc6-540c-4f6f-906b-7c8c49351706/bin/utaipan-verify-SwPr7d2a91/data/5fa8b9863/23a8011edd544c80bbd847849708c69a [2023-11-25 00:03:20,891 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-25 00:03:20,893 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-25 00:03:20,894 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-25 00:03:20,895 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-25 00:03:20,900 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-25 00:03:20,901 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 12:03:20" (1/1) ... [2023-11-25 00:03:20,902 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@19b35e3e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:03:20, skipping insertion in model container [2023-11-25 00:03:20,902 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 12:03:20" (1/1) ... [2023-11-25 00:03:20,970 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-25 00:03:21,283 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_24194dc6-540c-4f6f-906b-7c8c49351706/sv-benchmarks/c/product-lines/elevator_spec14_product23.cil.c[8585,8598] [2023-11-25 00:03:21,560 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-25 00:03:21,580 INFO L202 MainTranslator]: Completed pre-run [2023-11-25 00:03:21,591 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Test.i","") [48] [2023-11-25 00:03:21,593 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"UnitTests.i","") [408] [2023-11-25 00:03:21,593 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Specification14_spec.i","") [503] [2023-11-25 00:03:21,594 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"wsllib_check.i","") [544] [2023-11-25 00:03:21,594 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"libacc.i","") [553] [2023-11-25 00:03:21,594 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Floor.i","") [919] [2023-11-25 00:03:21,596 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Elevator.i","") [1586] [2023-11-25 00:03:21,596 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Person.i","") [3177] [2023-11-25 00:03:21,596 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"featureselect.i","") [3295] [2023-11-25 00:03:21,597 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"scenario.i","") [3330] [2023-11-25 00:03:21,650 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_24194dc6-540c-4f6f-906b-7c8c49351706/sv-benchmarks/c/product-lines/elevator_spec14_product23.cil.c[8585,8598] [2023-11-25 00:03:21,806 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-25 00:03:21,874 INFO L206 MainTranslator]: Completed translation [2023-11-25 00:03:21,874 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:03:21 WrapperNode [2023-11-25 00:03:21,875 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-25 00:03:21,876 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-25 00:03:21,876 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-25 00:03:21,877 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-25 00:03:21,911 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:03:21" (1/1) ... [2023-11-25 00:03:21,965 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:03:21" (1/1) ... [2023-11-25 00:03:22,034 INFO L138 Inliner]: procedures = 93, calls = 340, calls flagged for inlining = 27, calls inlined = 24, statements flattened = 853 [2023-11-25 00:03:22,034 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-25 00:03:22,035 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-25 00:03:22,035 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-25 00:03:22,036 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-25 00:03:22,046 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:03:21" (1/1) ... [2023-11-25 00:03:22,047 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:03:21" (1/1) ... [2023-11-25 00:03:22,053 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:03:21" (1/1) ... [2023-11-25 00:03:22,053 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:03:21" (1/1) ... [2023-11-25 00:03:22,078 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:03:21" (1/1) ... [2023-11-25 00:03:22,093 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:03:21" (1/1) ... [2023-11-25 00:03:22,098 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:03:21" (1/1) ... [2023-11-25 00:03:22,104 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:03:21" (1/1) ... [2023-11-25 00:03:22,128 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-25 00:03:22,129 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-25 00:03:22,130 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-25 00:03:22,130 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-25 00:03:22,131 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:03:21" (1/1) ... [2023-11-25 00:03:22,137 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-25 00:03:22,151 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24194dc6-540c-4f6f-906b-7c8c49351706/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-25 00:03:22,172 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24194dc6-540c-4f6f-906b-7c8c49351706/bin/utaipan-verify-SwPr7d2a91/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-25 00:03:22,204 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24194dc6-540c-4f6f-906b-7c8c49351706/bin/utaipan-verify-SwPr7d2a91/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-25 00:03:22,222 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-25 00:03:22,223 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor__wrappee__twothirdsfull [2023-11-25 00:03:22,223 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor__wrappee__twothirdsfull [2023-11-25 00:03:22,223 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2023-11-25 00:03:22,223 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2023-11-25 00:03:22,224 INFO L130 BoogieDeclarations]: Found specification of procedure bigMacCall [2023-11-25 00:03:22,225 INFO L138 BoogieDeclarations]: Found implementation of procedure bigMacCall [2023-11-25 00:03:22,225 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2023-11-25 00:03:22,225 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2023-11-25 00:03:22,225 INFO L130 BoogieDeclarations]: Found specification of procedure isExecutiveFloorCalling [2023-11-25 00:03:22,226 INFO L138 BoogieDeclarations]: Found implementation of procedure isExecutiveFloorCalling [2023-11-25 00:03:22,226 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2023-11-25 00:03:22,227 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2023-11-25 00:03:22,227 INFO L130 BoogieDeclarations]: Found specification of procedure bobCall [2023-11-25 00:03:22,228 INFO L138 BoogieDeclarations]: Found implementation of procedure bobCall [2023-11-25 00:03:22,228 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2023-11-25 00:03:22,230 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2023-11-25 00:03:22,230 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2023-11-25 00:03:22,230 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2023-11-25 00:03:22,230 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2023-11-25 00:03:22,231 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2023-11-25 00:03:22,231 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2023-11-25 00:03:22,231 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2023-11-25 00:03:22,231 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2023-11-25 00:03:22,231 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2023-11-25 00:03:22,231 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2023-11-25 00:03:22,232 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2023-11-25 00:03:22,232 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2023-11-25 00:03:22,232 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2023-11-25 00:03:22,233 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2023-11-25 00:03:22,233 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2023-11-25 00:03:22,233 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2023-11-25 00:03:22,233 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2023-11-25 00:03:22,233 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2023-11-25 00:03:22,234 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2023-11-25 00:03:22,234 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2023-11-25 00:03:22,234 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2023-11-25 00:03:22,234 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2023-11-25 00:03:22,234 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2023-11-25 00:03:22,234 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-25 00:03:22,235 INFO L130 BoogieDeclarations]: Found specification of procedure buttonForFloorIsPressed [2023-11-25 00:03:22,235 INFO L138 BoogieDeclarations]: Found implementation of procedure buttonForFloorIsPressed [2023-11-25 00:03:22,235 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2023-11-25 00:03:22,235 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2023-11-25 00:03:22,235 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2023-11-25 00:03:22,235 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2023-11-25 00:03:22,236 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2023-11-25 00:03:22,236 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2023-11-25 00:03:22,236 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection__wrappee__weight [2023-11-25 00:03:22,237 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection__wrappee__weight [2023-11-25 00:03:22,237 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-25 00:03:22,238 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-25 00:03:22,238 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2023-11-25 00:03:22,238 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2023-11-25 00:03:22,455 INFO L241 CfgBuilder]: Building ICFG [2023-11-25 00:03:22,459 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-25 00:03:23,766 INFO L282 CfgBuilder]: Performing block encoding [2023-11-25 00:03:24,767 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-25 00:03:24,768 INFO L309 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-25 00:03:24,770 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 12:03:24 BoogieIcfgContainer [2023-11-25 00:03:24,770 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-25 00:03:24,774 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-25 00:03:24,774 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-25 00:03:24,777 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-25 00:03:24,777 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 12:03:20" (1/3) ... [2023-11-25 00:03:24,778 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7e25bdae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 12:03:24, skipping insertion in model container [2023-11-25 00:03:24,778 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:03:21" (2/3) ... [2023-11-25 00:03:24,780 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7e25bdae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 12:03:24, skipping insertion in model container [2023-11-25 00:03:24,780 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 12:03:24" (3/3) ... [2023-11-25 00:03:24,782 INFO L112 eAbstractionObserver]: Analyzing ICFG elevator_spec14_product23.cil.c [2023-11-25 00:03:24,802 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-25 00:03:24,802 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-25 00:03:24,898 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-25 00:03:24,907 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;@54b02f72, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-25 00:03:24,908 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-25 00:03:24,916 INFO L276 IsEmpty]: Start isEmpty. Operand has 376 states, 250 states have (on average 1.552) internal successors, (388), 266 states have internal predecessors, (388), 99 states have call successors, (99), 25 states have call predecessors, (99), 25 states have return successors, (99), 97 states have call predecessors, (99), 99 states have call successors, (99) [2023-11-25 00:03:24,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2023-11-25 00:03:24,958 INFO L187 NwaCegarLoop]: Found error trace [2023-11-25 00:03:24,959 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-25 00:03:24,960 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-25 00:03:24,967 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-25 00:03:24,967 INFO L85 PathProgramCache]: Analyzing trace with hash -1209479793, now seen corresponding path program 1 times [2023-11-25 00:03:24,977 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-25 00:03:24,978 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1364042797] [2023-11-25 00:03:24,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:03:24,979 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-25 00:03:25,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:03:25,952 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-11-25 00:03:25,953 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-25 00:03:25,953 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1364042797] [2023-11-25 00:03:25,954 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1364042797] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-25 00:03:25,954 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-25 00:03:25,955 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-25 00:03:25,956 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1741510400] [2023-11-25 00:03:25,957 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-25 00:03:25,962 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-25 00:03:25,962 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-25 00:03:25,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-25 00:03:25,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-25 00:03:26,002 INFO L87 Difference]: Start difference. First operand has 376 states, 250 states have (on average 1.552) internal successors, (388), 266 states have internal predecessors, (388), 99 states have call successors, (99), 25 states have call predecessors, (99), 25 states have return successors, (99), 97 states have call predecessors, (99), 99 states have call successors, (99) Second operand has 5 states, 5 states have (on average 7.2) internal successors, (36), 5 states have internal predecessors, (36), 3 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2023-11-25 00:03:26,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-25 00:03:26,903 INFO L93 Difference]: Finished difference Result 1106 states and 1750 transitions. [2023-11-25 00:03:26,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-25 00:03:26,906 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.2) internal successors, (36), 5 states have internal predecessors, (36), 3 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) Word has length 73 [2023-11-25 00:03:26,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-25 00:03:26,927 INFO L225 Difference]: With dead ends: 1106 [2023-11-25 00:03:26,927 INFO L226 Difference]: Without dead ends: 731 [2023-11-25 00:03:26,939 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-25 00:03:26,942 INFO L413 NwaCegarLoop]: 619 mSDtfsCounter, 561 mSDsluCounter, 1570 mSDsCounter, 0 mSdLazyCounter, 408 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 561 SdHoareTripleChecker+Valid, 2189 SdHoareTripleChecker+Invalid, 418 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 408 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-25 00:03:26,943 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [561 Valid, 2189 Invalid, 418 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 408 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-25 00:03:26,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 731 states. [2023-11-25 00:03:27,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 731 to 725. [2023-11-25 00:03:27,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 725 states, 485 states have (on average 1.5422680412371135) internal successors, (748), 514 states have internal predecessors, (748), 192 states have call successors, (192), 49 states have call predecessors, (192), 47 states have return successors, (198), 186 states have call predecessors, (198), 190 states have call successors, (198) [2023-11-25 00:03:27,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 725 states to 725 states and 1138 transitions. [2023-11-25 00:03:27,108 INFO L78 Accepts]: Start accepts. Automaton has 725 states and 1138 transitions. Word has length 73 [2023-11-25 00:03:27,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-25 00:03:27,109 INFO L495 AbstractCegarLoop]: Abstraction has 725 states and 1138 transitions. [2023-11-25 00:03:27,109 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.2) internal successors, (36), 5 states have internal predecessors, (36), 3 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2023-11-25 00:03:27,110 INFO L276 IsEmpty]: Start isEmpty. Operand 725 states and 1138 transitions. [2023-11-25 00:03:27,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2023-11-25 00:03:27,116 INFO L187 NwaCegarLoop]: Found error trace [2023-11-25 00:03:27,116 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-25 00:03:27,116 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-25 00:03:27,117 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-25 00:03:27,117 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-25 00:03:27,117 INFO L85 PathProgramCache]: Analyzing trace with hash 479602059, now seen corresponding path program 1 times [2023-11-25 00:03:27,118 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-25 00:03:27,118 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1572461361] [2023-11-25 00:03:27,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:03:27,118 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-25 00:03:27,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:03:27,554 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-11-25 00:03:27,556 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-25 00:03:27,557 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1572461361] [2023-11-25 00:03:27,558 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1572461361] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-25 00:03:27,560 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-25 00:03:27,560 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-25 00:03:27,561 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [942504004] [2023-11-25 00:03:27,561 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-25 00:03:27,563 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-25 00:03:27,563 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-25 00:03:27,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-25 00:03:27,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-25 00:03:27,566 INFO L87 Difference]: Start difference. First operand 725 states and 1138 transitions. Second operand has 5 states, 5 states have (on average 7.6) internal successors, (38), 5 states have internal predecessors, (38), 3 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2023-11-25 00:03:28,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-25 00:03:28,306 INFO L93 Difference]: Finished difference Result 831 states and 1277 transitions. [2023-11-25 00:03:28,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-25 00:03:28,307 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.6) internal successors, (38), 5 states have internal predecessors, (38), 3 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) Word has length 77 [2023-11-25 00:03:28,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-25 00:03:28,318 INFO L225 Difference]: With dead ends: 831 [2023-11-25 00:03:28,318 INFO L226 Difference]: Without dead ends: 829 [2023-11-25 00:03:28,324 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-11-25 00:03:28,326 INFO L413 NwaCegarLoop]: 655 mSDtfsCounter, 682 mSDsluCounter, 1049 mSDsCounter, 0 mSdLazyCounter, 423 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 682 SdHoareTripleChecker+Valid, 1704 SdHoareTripleChecker+Invalid, 427 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 423 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-25 00:03:28,327 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [682 Valid, 1704 Invalid, 427 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 423 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-25 00:03:28,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 829 states. [2023-11-25 00:03:28,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 829 to 822. [2023-11-25 00:03:28,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 822 states, 544 states have (on average 1.5091911764705883) internal successors, (821), 573 states have internal predecessors, (821), 217 states have call successors, (217), 63 states have call predecessors, (217), 60 states have return successors, (229), 209 states have call predecessors, (229), 214 states have call successors, (229) [2023-11-25 00:03:28,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 822 states to 822 states and 1267 transitions. [2023-11-25 00:03:28,429 INFO L78 Accepts]: Start accepts. Automaton has 822 states and 1267 transitions. Word has length 77 [2023-11-25 00:03:28,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-25 00:03:28,431 INFO L495 AbstractCegarLoop]: Abstraction has 822 states and 1267 transitions. [2023-11-25 00:03:28,432 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.6) internal successors, (38), 5 states have internal predecessors, (38), 3 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2023-11-25 00:03:28,432 INFO L276 IsEmpty]: Start isEmpty. Operand 822 states and 1267 transitions. [2023-11-25 00:03:28,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2023-11-25 00:03:28,441 INFO L187 NwaCegarLoop]: Found error trace [2023-11-25 00:03:28,441 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 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] [2023-11-25 00:03:28,441 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-25 00:03:28,442 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-25 00:03:28,452 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-25 00:03:28,452 INFO L85 PathProgramCache]: Analyzing trace with hash 1152121879, now seen corresponding path program 1 times [2023-11-25 00:03:28,452 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-25 00:03:28,452 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [951381489] [2023-11-25 00:03:28,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:03:28,453 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-25 00:03:28,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:03:28,756 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2023-11-25 00:03:28,756 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-25 00:03:28,757 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [951381489] [2023-11-25 00:03:28,757 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [951381489] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-25 00:03:28,758 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-25 00:03:28,758 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-25 00:03:28,758 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [621065386] [2023-11-25 00:03:28,758 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-25 00:03:28,760 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-25 00:03:28,760 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-25 00:03:28,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-25 00:03:28,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-25 00:03:28,762 INFO L87 Difference]: Start difference. First operand 822 states and 1267 transitions. Second operand has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 2 states have call successors, (16), 1 states have call predecessors, (16), 1 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2023-11-25 00:03:29,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-25 00:03:29,006 INFO L93 Difference]: Finished difference Result 1670 states and 2603 transitions. [2023-11-25 00:03:29,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-25 00:03:29,007 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 2 states have call successors, (16), 1 states have call predecessors, (16), 1 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) Word has length 108 [2023-11-25 00:03:29,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-25 00:03:29,016 INFO L225 Difference]: With dead ends: 1670 [2023-11-25 00:03:29,016 INFO L226 Difference]: Without dead ends: 860 [2023-11-25 00:03:29,027 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 [2023-11-25 00:03:29,028 INFO L413 NwaCegarLoop]: 543 mSDtfsCounter, 54 mSDsluCounter, 1065 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 1608 SdHoareTripleChecker+Invalid, 134 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-25 00:03:29,029 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 1608 Invalid, 134 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 115 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-25 00:03:29,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 860 states. [2023-11-25 00:03:29,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 860 to 826. [2023-11-25 00:03:29,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 826 states, 548 states have (on average 1.5054744525547445) internal successors, (825), 577 states have internal predecessors, (825), 217 states have call successors, (217), 63 states have call predecessors, (217), 60 states have return successors, (229), 209 states have call predecessors, (229), 214 states have call successors, (229) [2023-11-25 00:03:29,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 826 states to 826 states and 1271 transitions. [2023-11-25 00:03:29,105 INFO L78 Accepts]: Start accepts. Automaton has 826 states and 1271 transitions. Word has length 108 [2023-11-25 00:03:29,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-25 00:03:29,106 INFO L495 AbstractCegarLoop]: Abstraction has 826 states and 1271 transitions. [2023-11-25 00:03:29,106 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 2 states have call successors, (16), 1 states have call predecessors, (16), 1 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2023-11-25 00:03:29,106 INFO L276 IsEmpty]: Start isEmpty. Operand 826 states and 1271 transitions. [2023-11-25 00:03:29,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2023-11-25 00:03:29,114 INFO L187 NwaCegarLoop]: Found error trace [2023-11-25 00:03:29,115 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-25 00:03:29,115 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-25 00:03:29,115 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-25 00:03:29,115 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-25 00:03:29,116 INFO L85 PathProgramCache]: Analyzing trace with hash -640535430, now seen corresponding path program 1 times [2023-11-25 00:03:29,116 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-25 00:03:29,116 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [42692838] [2023-11-25 00:03:29,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:03:29,117 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-25 00:03:29,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:03:30,252 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 5 proven. 17 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2023-11-25 00:03:30,252 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-25 00:03:30,252 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [42692838] [2023-11-25 00:03:30,253 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [42692838] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-25 00:03:30,253 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1897131994] [2023-11-25 00:03:30,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:03:30,253 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-25 00:03:30,254 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24194dc6-540c-4f6f-906b-7c8c49351706/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-25 00:03:30,260 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24194dc6-540c-4f6f-906b-7c8c49351706/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-25 00:03:30,286 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24194dc6-540c-4f6f-906b-7c8c49351706/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-25 00:03:30,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:03:30,618 INFO L262 TraceCheckSpWp]: Trace formula consists of 1275 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-25 00:03:30,632 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-25 00:03:30,734 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 52 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2023-11-25 00:03:30,734 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-25 00:03:30,734 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1897131994] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-25 00:03:30,734 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-25 00:03:30,735 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [12] total 14 [2023-11-25 00:03:30,735 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [686043008] [2023-11-25 00:03:30,735 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-25 00:03:30,736 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-25 00:03:30,736 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-25 00:03:30,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-25 00:03:30,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2023-11-25 00:03:30,738 INFO L87 Difference]: Start difference. First operand 826 states and 1271 transitions. Second operand has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 2 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2023-11-25 00:03:31,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-25 00:03:31,142 INFO L93 Difference]: Finished difference Result 1718 states and 2692 transitions. [2023-11-25 00:03:31,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-25 00:03:31,143 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 2 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) Word has length 115 [2023-11-25 00:03:31,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-25 00:03:31,152 INFO L225 Difference]: With dead ends: 1718 [2023-11-25 00:03:31,152 INFO L226 Difference]: Without dead ends: 904 [2023-11-25 00:03:31,162 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2023-11-25 00:03:31,168 INFO L413 NwaCegarLoop]: 473 mSDtfsCounter, 213 mSDsluCounter, 922 mSDsCounter, 0 mSdLazyCounter, 254 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 213 SdHoareTripleChecker+Valid, 1395 SdHoareTripleChecker+Invalid, 263 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 254 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-25 00:03:31,169 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [213 Valid, 1395 Invalid, 263 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 254 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-25 00:03:31,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 904 states. [2023-11-25 00:03:31,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 904 to 904. [2023-11-25 00:03:31,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 904 states, 624 states have (on average 1.5560897435897436) internal successors, (971), 653 states have internal predecessors, (971), 217 states have call successors, (217), 65 states have call predecessors, (217), 62 states have return successors, (229), 209 states have call predecessors, (229), 214 states have call successors, (229) [2023-11-25 00:03:31,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 904 states to 904 states and 1417 transitions. [2023-11-25 00:03:31,274 INFO L78 Accepts]: Start accepts. Automaton has 904 states and 1417 transitions. Word has length 115 [2023-11-25 00:03:31,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-25 00:03:31,276 INFO L495 AbstractCegarLoop]: Abstraction has 904 states and 1417 transitions. [2023-11-25 00:03:31,277 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 2 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2023-11-25 00:03:31,281 INFO L276 IsEmpty]: Start isEmpty. Operand 904 states and 1417 transitions. [2023-11-25 00:03:31,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2023-11-25 00:03:31,289 INFO L187 NwaCegarLoop]: Found error trace [2023-11-25 00:03:31,289 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 5, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-25 00:03:31,309 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24194dc6-540c-4f6f-906b-7c8c49351706/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-25 00:03:31,497 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24194dc6-540c-4f6f-906b-7c8c49351706/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-25 00:03:31,498 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-25 00:03:31,498 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-25 00:03:31,498 INFO L85 PathProgramCache]: Analyzing trace with hash 601027858, now seen corresponding path program 1 times [2023-11-25 00:03:31,498 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-25 00:03:31,499 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [691069145] [2023-11-25 00:03:31,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:03:31,499 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-25 00:03:31,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:03:31,699 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 9 proven. 15 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2023-11-25 00:03:31,699 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-25 00:03:31,700 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [691069145] [2023-11-25 00:03:31,700 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [691069145] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-25 00:03:31,700 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [395016706] [2023-11-25 00:03:31,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:03:31,701 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-25 00:03:31,701 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24194dc6-540c-4f6f-906b-7c8c49351706/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-25 00:03:31,702 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24194dc6-540c-4f6f-906b-7c8c49351706/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-25 00:03:31,724 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24194dc6-540c-4f6f-906b-7c8c49351706/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-25 00:03:32,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:03:32,040 INFO L262 TraceCheckSpWp]: Trace formula consists of 1280 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-25 00:03:32,047 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-25 00:03:32,096 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 68 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2023-11-25 00:03:32,096 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-25 00:03:32,096 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [395016706] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-25 00:03:32,096 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-25 00:03:32,097 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2023-11-25 00:03:32,097 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2068490743] [2023-11-25 00:03:32,097 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-25 00:03:32,098 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-25 00:03:32,098 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-25 00:03:32,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-25 00:03:32,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-25 00:03:32,099 INFO L87 Difference]: Start difference. First operand 904 states and 1417 transitions. Second operand has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 2 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2023-11-25 00:03:32,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-25 00:03:32,527 INFO L93 Difference]: Finished difference Result 1874 states and 2982 transitions. [2023-11-25 00:03:32,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-25 00:03:32,528 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 2 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) Word has length 120 [2023-11-25 00:03:32,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-25 00:03:32,538 INFO L225 Difference]: With dead ends: 1874 [2023-11-25 00:03:32,539 INFO L226 Difference]: Without dead ends: 982 [2023-11-25 00:03:32,545 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-11-25 00:03:32,548 INFO L413 NwaCegarLoop]: 473 mSDtfsCounter, 211 mSDsluCounter, 922 mSDsCounter, 0 mSdLazyCounter, 248 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 211 SdHoareTripleChecker+Valid, 1395 SdHoareTripleChecker+Invalid, 262 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 248 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-25 00:03:32,549 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [211 Valid, 1395 Invalid, 262 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 248 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-25 00:03:32,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 982 states. [2023-11-25 00:03:32,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 982 to 982. [2023-11-25 00:03:32,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 982 states, 700 states have (on average 1.5957142857142856) internal successors, (1117), 729 states have internal predecessors, (1117), 217 states have call successors, (217), 67 states have call predecessors, (217), 64 states have return successors, (229), 209 states have call predecessors, (229), 214 states have call successors, (229) [2023-11-25 00:03:32,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 982 states to 982 states and 1563 transitions. [2023-11-25 00:03:32,615 INFO L78 Accepts]: Start accepts. Automaton has 982 states and 1563 transitions. Word has length 120 [2023-11-25 00:03:32,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-25 00:03:32,616 INFO L495 AbstractCegarLoop]: Abstraction has 982 states and 1563 transitions. [2023-11-25 00:03:32,616 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 2 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2023-11-25 00:03:32,616 INFO L276 IsEmpty]: Start isEmpty. Operand 982 states and 1563 transitions. [2023-11-25 00:03:32,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2023-11-25 00:03:32,623 INFO L187 NwaCegarLoop]: Found error trace [2023-11-25 00:03:32,623 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 4, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-25 00:03:32,637 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24194dc6-540c-4f6f-906b-7c8c49351706/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-25 00:03:32,832 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24194dc6-540c-4f6f-906b-7c8c49351706/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-25 00:03:32,832 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-25 00:03:32,833 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-25 00:03:32,833 INFO L85 PathProgramCache]: Analyzing trace with hash 1553042114, now seen corresponding path program 1 times [2023-11-25 00:03:32,833 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-25 00:03:32,833 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [569684158] [2023-11-25 00:03:32,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:03:32,834 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-25 00:03:32,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:03:33,061 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 15 proven. 12 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2023-11-25 00:03:33,061 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-25 00:03:33,061 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [569684158] [2023-11-25 00:03:33,062 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [569684158] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-25 00:03:33,062 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [25911918] [2023-11-25 00:03:33,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:03:33,062 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-25 00:03:33,063 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24194dc6-540c-4f6f-906b-7c8c49351706/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-25 00:03:33,064 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24194dc6-540c-4f6f-906b-7c8c49351706/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-25 00:03:33,089 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24194dc6-540c-4f6f-906b-7c8c49351706/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-25 00:03:33,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:03:33,404 INFO L262 TraceCheckSpWp]: Trace formula consists of 1284 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-25 00:03:33,411 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-25 00:03:33,460 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 73 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-11-25 00:03:33,461 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-25 00:03:33,461 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [25911918] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-25 00:03:33,461 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-25 00:03:33,461 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2023-11-25 00:03:33,462 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1819032180] [2023-11-25 00:03:33,462 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-25 00:03:33,462 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-25 00:03:33,463 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-25 00:03:33,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-25 00:03:33,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-25 00:03:33,464 INFO L87 Difference]: Start difference. First operand 982 states and 1563 transitions. Second operand has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 2 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2023-11-25 00:03:33,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-25 00:03:33,898 INFO L93 Difference]: Finished difference Result 2030 states and 3272 transitions. [2023-11-25 00:03:33,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-25 00:03:33,899 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 2 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) Word has length 124 [2023-11-25 00:03:33,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-25 00:03:33,909 INFO L225 Difference]: With dead ends: 2030 [2023-11-25 00:03:33,910 INFO L226 Difference]: Without dead ends: 1060 [2023-11-25 00:03:33,918 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-11-25 00:03:33,919 INFO L413 NwaCegarLoop]: 473 mSDtfsCounter, 209 mSDsluCounter, 922 mSDsCounter, 0 mSdLazyCounter, 242 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 209 SdHoareTripleChecker+Valid, 1395 SdHoareTripleChecker+Invalid, 261 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 242 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-25 00:03:33,919 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [209 Valid, 1395 Invalid, 261 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 242 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-25 00:03:33,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1060 states. [2023-11-25 00:03:33,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1060 to 1060. [2023-11-25 00:03:33,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1060 states, 776 states have (on average 1.6275773195876289) internal successors, (1263), 805 states have internal predecessors, (1263), 217 states have call successors, (217), 69 states have call predecessors, (217), 66 states have return successors, (229), 209 states have call predecessors, (229), 214 states have call successors, (229) [2023-11-25 00:03:34,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1060 states to 1060 states and 1709 transitions. [2023-11-25 00:03:34,001 INFO L78 Accepts]: Start accepts. Automaton has 1060 states and 1709 transitions. Word has length 124 [2023-11-25 00:03:34,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-25 00:03:34,002 INFO L495 AbstractCegarLoop]: Abstraction has 1060 states and 1709 transitions. [2023-11-25 00:03:34,002 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 2 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2023-11-25 00:03:34,002 INFO L276 IsEmpty]: Start isEmpty. Operand 1060 states and 1709 transitions. [2023-11-25 00:03:34,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2023-11-25 00:03:34,010 INFO L187 NwaCegarLoop]: Found error trace [2023-11-25 00:03:34,010 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 4, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-25 00:03:34,023 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24194dc6-540c-4f6f-906b-7c8c49351706/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-25 00:03:34,218 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24194dc6-540c-4f6f-906b-7c8c49351706/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-25 00:03:34,219 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-25 00:03:34,219 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-25 00:03:34,219 INFO L85 PathProgramCache]: Analyzing trace with hash 1062765018, now seen corresponding path program 1 times [2023-11-25 00:03:34,219 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-25 00:03:34,220 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1292573126] [2023-11-25 00:03:34,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:03:34,220 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-25 00:03:34,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:03:34,486 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 22 proven. 7 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2023-11-25 00:03:34,487 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-25 00:03:34,487 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1292573126] [2023-11-25 00:03:34,487 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1292573126] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-25 00:03:34,487 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [653301517] [2023-11-25 00:03:34,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:03:34,488 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-25 00:03:34,488 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24194dc6-540c-4f6f-906b-7c8c49351706/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-25 00:03:34,489 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24194dc6-540c-4f6f-906b-7c8c49351706/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-25 00:03:34,508 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24194dc6-540c-4f6f-906b-7c8c49351706/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-25 00:03:34,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:03:34,818 INFO L262 TraceCheckSpWp]: Trace formula consists of 1287 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-25 00:03:34,823 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-25 00:03:34,856 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 64 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2023-11-25 00:03:34,856 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-25 00:03:34,856 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [653301517] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-25 00:03:34,857 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-25 00:03:34,857 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2023-11-25 00:03:34,857 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [123197213] [2023-11-25 00:03:34,857 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-25 00:03:34,858 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-25 00:03:34,858 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-25 00:03:34,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-25 00:03:34,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-25 00:03:34,859 INFO L87 Difference]: Start difference. First operand 1060 states and 1709 transitions. Second operand has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 2 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2023-11-25 00:03:35,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-25 00:03:35,243 INFO L93 Difference]: Finished difference Result 2186 states and 3562 transitions. [2023-11-25 00:03:35,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-25 00:03:35,244 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 2 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) Word has length 127 [2023-11-25 00:03:35,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-25 00:03:35,254 INFO L225 Difference]: With dead ends: 2186 [2023-11-25 00:03:35,254 INFO L226 Difference]: Without dead ends: 1138 [2023-11-25 00:03:35,262 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 127 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-11-25 00:03:35,262 INFO L413 NwaCegarLoop]: 473 mSDtfsCounter, 207 mSDsluCounter, 922 mSDsCounter, 0 mSdLazyCounter, 236 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 207 SdHoareTripleChecker+Valid, 1395 SdHoareTripleChecker+Invalid, 260 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 236 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-25 00:03:35,263 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [207 Valid, 1395 Invalid, 260 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 236 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-25 00:03:35,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1138 states. [2023-11-25 00:03:35,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1138 to 1138. [2023-11-25 00:03:35,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1138 states, 852 states have (on average 1.653755868544601) internal successors, (1409), 881 states have internal predecessors, (1409), 217 states have call successors, (217), 71 states have call predecessors, (217), 68 states have return successors, (229), 209 states have call predecessors, (229), 214 states have call successors, (229) [2023-11-25 00:03:35,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1138 states to 1138 states and 1855 transitions. [2023-11-25 00:03:35,331 INFO L78 Accepts]: Start accepts. Automaton has 1138 states and 1855 transitions. Word has length 127 [2023-11-25 00:03:35,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-25 00:03:35,332 INFO L495 AbstractCegarLoop]: Abstraction has 1138 states and 1855 transitions. [2023-11-25 00:03:35,332 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 2 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2023-11-25 00:03:35,333 INFO L276 IsEmpty]: Start isEmpty. Operand 1138 states and 1855 transitions. [2023-11-25 00:03:35,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2023-11-25 00:03:35,340 INFO L187 NwaCegarLoop]: Found error trace [2023-11-25 00:03:35,340 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 4, 3, 3, 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] [2023-11-25 00:03:35,353 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24194dc6-540c-4f6f-906b-7c8c49351706/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-25 00:03:35,556 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24194dc6-540c-4f6f-906b-7c8c49351706/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-25 00:03:35,556 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-25 00:03:35,557 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-25 00:03:35,557 INFO L85 PathProgramCache]: Analyzing trace with hash 1962779242, now seen corresponding path program 1 times [2023-11-25 00:03:35,557 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-25 00:03:35,557 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [63713530] [2023-11-25 00:03:35,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:03:35,558 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-25 00:03:35,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:03:39,363 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 1 proven. 31 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2023-11-25 00:03:39,363 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-25 00:03:39,364 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [63713530] [2023-11-25 00:03:39,364 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [63713530] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-25 00:03:39,364 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1352449766] [2023-11-25 00:03:39,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:03:39,364 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-25 00:03:39,364 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24194dc6-540c-4f6f-906b-7c8c49351706/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-25 00:03:39,367 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24194dc6-540c-4f6f-906b-7c8c49351706/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-25 00:03:39,392 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24194dc6-540c-4f6f-906b-7c8c49351706/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-25 00:03:39,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:03:39,699 INFO L262 TraceCheckSpWp]: Trace formula consists of 1289 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-25 00:03:39,704 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-25 00:03:39,804 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 38 proven. 0 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2023-11-25 00:03:39,805 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-25 00:03:39,805 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1352449766] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-25 00:03:39,805 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-25 00:03:39,805 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [34] total 36 [2023-11-25 00:03:39,806 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [514240518] [2023-11-25 00:03:39,806 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-25 00:03:39,807 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-25 00:03:39,807 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-25 00:03:39,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-25 00:03:39,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=1150, Unknown=0, NotChecked=0, Total=1260 [2023-11-25 00:03:39,809 INFO L87 Difference]: Start difference. First operand 1138 states and 1855 transitions. Second operand has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 2 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2023-11-25 00:03:40,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-25 00:03:40,185 INFO L93 Difference]: Finished difference Result 2342 states and 3852 transitions. [2023-11-25 00:03:40,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-25 00:03:40,185 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 2 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) Word has length 129 [2023-11-25 00:03:40,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-25 00:03:40,197 INFO L225 Difference]: With dead ends: 2342 [2023-11-25 00:03:40,197 INFO L226 Difference]: Without dead ends: 1216 [2023-11-25 00:03:40,205 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 213 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=114, Invalid=1218, Unknown=0, NotChecked=0, Total=1332 [2023-11-25 00:03:40,207 INFO L413 NwaCegarLoop]: 473 mSDtfsCounter, 205 mSDsluCounter, 922 mSDsCounter, 0 mSdLazyCounter, 230 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 205 SdHoareTripleChecker+Valid, 1395 SdHoareTripleChecker+Invalid, 259 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 230 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-25 00:03:40,207 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [205 Valid, 1395 Invalid, 259 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 230 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-25 00:03:40,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1216 states. [2023-11-25 00:03:40,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1216 to 1216. [2023-11-25 00:03:40,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1216 states, 928 states have (on average 1.675646551724138) internal successors, (1555), 957 states have internal predecessors, (1555), 217 states have call successors, (217), 73 states have call predecessors, (217), 70 states have return successors, (229), 209 states have call predecessors, (229), 214 states have call successors, (229) [2023-11-25 00:03:40,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1216 states to 1216 states and 2001 transitions. [2023-11-25 00:03:40,279 INFO L78 Accepts]: Start accepts. Automaton has 1216 states and 2001 transitions. Word has length 129 [2023-11-25 00:03:40,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-25 00:03:40,280 INFO L495 AbstractCegarLoop]: Abstraction has 1216 states and 2001 transitions. [2023-11-25 00:03:40,280 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 2 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2023-11-25 00:03:40,281 INFO L276 IsEmpty]: Start isEmpty. Operand 1216 states and 2001 transitions. [2023-11-25 00:03:40,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2023-11-25 00:03:40,287 INFO L187 NwaCegarLoop]: Found error trace [2023-11-25 00:03:40,287 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 4, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-25 00:03:40,300 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24194dc6-540c-4f6f-906b-7c8c49351706/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-25 00:03:40,495 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24194dc6-540c-4f6f-906b-7c8c49351706/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2023-11-25 00:03:40,495 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-25 00:03:40,496 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-25 00:03:40,496 INFO L85 PathProgramCache]: Analyzing trace with hash 440122777, now seen corresponding path program 1 times [2023-11-25 00:03:40,497 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-25 00:03:40,497 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2129557033] [2023-11-25 00:03:40,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:03:40,497 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-25 00:03:40,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:03:40,759 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2023-11-25 00:03:40,759 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-25 00:03:40,759 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2129557033] [2023-11-25 00:03:40,760 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2129557033] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-25 00:03:40,760 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-25 00:03:40,760 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-25 00:03:40,760 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1447115563] [2023-11-25 00:03:40,760 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-25 00:03:40,761 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-25 00:03:40,761 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-25 00:03:40,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-25 00:03:40,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-25 00:03:40,762 INFO L87 Difference]: Start difference. First operand 1216 states and 2001 transitions. Second operand has 6 states, 6 states have (on average 12.0) internal successors, (72), 6 states have internal predecessors, (72), 4 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) [2023-11-25 00:03:41,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-25 00:03:41,507 INFO L93 Difference]: Finished difference Result 2504 states and 4108 transitions. [2023-11-25 00:03:41,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-25 00:03:41,508 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.0) internal successors, (72), 6 states have internal predecessors, (72), 4 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) Word has length 129 [2023-11-25 00:03:41,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-25 00:03:41,518 INFO L225 Difference]: With dead ends: 2504 [2023-11-25 00:03:41,518 INFO L226 Difference]: Without dead ends: 1113 [2023-11-25 00:03:41,526 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2023-11-25 00:03:41,528 INFO L413 NwaCegarLoop]: 545 mSDtfsCounter, 695 mSDsluCounter, 1985 mSDsCounter, 0 mSdLazyCounter, 561 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 695 SdHoareTripleChecker+Valid, 2530 SdHoareTripleChecker+Invalid, 640 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 561 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-25 00:03:41,529 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [695 Valid, 2530 Invalid, 640 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 561 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-25 00:03:41,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1113 states. [2023-11-25 00:03:41,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1113 to 1090. [2023-11-25 00:03:41,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1090 states, 782 states have (on average 1.5549872122762147) internal successors, (1216), 813 states have internal predecessors, (1216), 229 states have call successors, (229), 82 states have call predecessors, (229), 78 states have return successors, (249), 218 states have call predecessors, (249), 226 states have call successors, (249) [2023-11-25 00:03:41,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1090 states to 1090 states and 1694 transitions. [2023-11-25 00:03:41,609 INFO L78 Accepts]: Start accepts. Automaton has 1090 states and 1694 transitions. Word has length 129 [2023-11-25 00:03:41,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-25 00:03:41,610 INFO L495 AbstractCegarLoop]: Abstraction has 1090 states and 1694 transitions. [2023-11-25 00:03:41,610 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.0) internal successors, (72), 6 states have internal predecessors, (72), 4 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) [2023-11-25 00:03:41,610 INFO L276 IsEmpty]: Start isEmpty. Operand 1090 states and 1694 transitions. [2023-11-25 00:03:41,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2023-11-25 00:03:41,616 INFO L187 NwaCegarLoop]: Found error trace [2023-11-25 00:03:41,616 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 4, 3, 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] [2023-11-25 00:03:41,617 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-25 00:03:41,617 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-25 00:03:41,617 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-25 00:03:41,617 INFO L85 PathProgramCache]: Analyzing trace with hash -497370670, now seen corresponding path program 1 times [2023-11-25 00:03:41,618 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-25 00:03:41,618 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1113895466] [2023-11-25 00:03:41,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:03:41,618 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-25 00:03:41,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:03:44,894 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 1 proven. 31 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2023-11-25 00:03:44,894 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-25 00:03:44,894 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1113895466] [2023-11-25 00:03:44,894 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1113895466] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-25 00:03:44,894 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1724127356] [2023-11-25 00:03:44,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:03:44,895 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-25 00:03:44,895 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24194dc6-540c-4f6f-906b-7c8c49351706/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-25 00:03:44,896 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24194dc6-540c-4f6f-906b-7c8c49351706/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-25 00:03:44,912 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24194dc6-540c-4f6f-906b-7c8c49351706/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-25 00:03:45,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:03:45,230 INFO L262 TraceCheckSpWp]: Trace formula consists of 1290 conjuncts, 40 conjunts are in the unsatisfiable core [2023-11-25 00:03:45,237 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-25 00:03:46,874 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2023-11-25 00:03:46,874 INFO L327 TraceCheckSpWp]: Computing backward predicates...