./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/elevator_spec14_product31.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 30e01a73 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8097af62-d56c-4bce-a9c2-9f28fdc954ee/bin/utaipan-verify-mE87zJ7Ire/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8097af62-d56c-4bce-a9c2-9f28fdc954ee/bin/utaipan-verify-mE87zJ7Ire/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8097af62-d56c-4bce-a9c2-9f28fdc954ee/bin/utaipan-verify-mE87zJ7Ire/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8097af62-d56c-4bce-a9c2-9f28fdc954ee/bin/utaipan-verify-mE87zJ7Ire/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec14_product31.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8097af62-d56c-4bce-a9c2-9f28fdc954ee/bin/utaipan-verify-mE87zJ7Ire/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8097af62-d56c-4bce-a9c2-9f28fdc954ee/bin/utaipan-verify-mE87zJ7Ire --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 866b4070887ce539f36e137c6ed6e587ee3f43d9563c34ef0dd3382aa4e2313a --- Real Ultimate output --- This is Ultimate 0.2.3-dev-30e01a7 [2023-11-23 20:36:43,367 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-23 20:36:43,493 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8097af62-d56c-4bce-a9c2-9f28fdc954ee/bin/utaipan-verify-mE87zJ7Ire/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-11-23 20:36:43,502 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-23 20:36:43,503 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-23 20:36:43,545 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-23 20:36:43,545 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-23 20:36:43,546 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-23 20:36:43,547 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-23 20:36:43,555 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-23 20:36:43,555 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-23 20:36:43,557 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-23 20:36:43,557 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-23 20:36:43,559 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-23 20:36:43,559 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-23 20:36:43,560 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-23 20:36:43,560 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-23 20:36:43,561 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-23 20:36:43,561 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-23 20:36:43,562 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-23 20:36:43,562 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-23 20:36:43,564 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-23 20:36:43,566 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-23 20:36:43,566 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-23 20:36:43,567 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-23 20:36:43,567 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-23 20:36:43,567 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-23 20:36:43,568 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-23 20:36:43,568 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-23 20:36:43,569 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-23 20:36:43,570 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-23 20:36:43,570 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-23 20:36:43,570 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-23 20:36:43,571 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-23 20:36:43,571 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-23 20:36:43,571 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-23 20:36:43,571 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-23 20:36:43,572 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 20:36:43,572 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-23 20:36:43,572 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-23 20:36:43,572 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-23 20:36:43,575 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-23 20:36:43,576 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-23 20:36:43,576 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-23 20:36:43,577 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-23 20:36:43,577 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-23 20:36:43,577 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-23 20:36:43,577 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_8097af62-d56c-4bce-a9c2-9f28fdc954ee/bin/utaipan-verify-mE87zJ7Ire/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8097af62-d56c-4bce-a9c2-9f28fdc954ee/bin/utaipan-verify-mE87zJ7Ire Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 866b4070887ce539f36e137c6ed6e587ee3f43d9563c34ef0dd3382aa4e2313a [2023-11-23 20:36:43,879 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-23 20:36:43,910 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-23 20:36:43,913 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-23 20:36:43,914 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-23 20:36:43,915 INFO L274 PluginConnector]: CDTParser initialized [2023-11-23 20:36:43,916 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8097af62-d56c-4bce-a9c2-9f28fdc954ee/bin/utaipan-verify-mE87zJ7Ire/../../sv-benchmarks/c/product-lines/elevator_spec14_product31.cil.c [2023-11-23 20:36:46,967 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-23 20:36:47,351 INFO L384 CDTParser]: Found 1 translation units. [2023-11-23 20:36:47,351 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8097af62-d56c-4bce-a9c2-9f28fdc954ee/sv-benchmarks/c/product-lines/elevator_spec14_product31.cil.c [2023-11-23 20:36:47,375 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8097af62-d56c-4bce-a9c2-9f28fdc954ee/bin/utaipan-verify-mE87zJ7Ire/data/3d9b35eac/4d0155e43d254ba699358d120549c770/FLAGa693bcd31 [2023-11-23 20:36:47,391 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8097af62-d56c-4bce-a9c2-9f28fdc954ee/bin/utaipan-verify-mE87zJ7Ire/data/3d9b35eac/4d0155e43d254ba699358d120549c770 [2023-11-23 20:36:47,394 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-23 20:36:47,395 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-23 20:36:47,397 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-23 20:36:47,397 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-23 20:36:47,403 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-23 20:36:47,404 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 08:36:47" (1/1) ... [2023-11-23 20:36:47,405 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@75aa594 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:36:47, skipping insertion in model container [2023-11-23 20:36:47,405 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 08:36:47" (1/1) ... [2023-11-23 20:36:47,486 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-23 20:36:48,215 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_8097af62-d56c-4bce-a9c2-9f28fdc954ee/sv-benchmarks/c/product-lines/elevator_spec14_product31.cil.c[71150,71163] [2023-11-23 20:36:48,220 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 20:36:48,238 INFO L202 MainTranslator]: Completed pre-run [2023-11-23 20:36:48,250 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Floor.i","") [48] [2023-11-23 20:36:48,253 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"libacc.i","") [716] [2023-11-23 20:36:48,253 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"UnitTests.i","") [1082] [2023-11-23 20:36:48,253 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"featureselect.i","") [1183] [2023-11-23 20:36:48,254 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Person.i","") [1221] [2023-11-23 20:36:48,256 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Elevator.i","") [1341] [2023-11-23 20:36:48,257 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Test.i","") [2956] [2023-11-23 20:36:48,257 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Specification14_spec.i","") [3305] [2023-11-23 20:36:48,257 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"wsllib_check.i","") [3342] [2023-11-23 20:36:48,258 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"scenario.i","") [3351] [2023-11-23 20:36:48,396 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_8097af62-d56c-4bce-a9c2-9f28fdc954ee/sv-benchmarks/c/product-lines/elevator_spec14_product31.cil.c[71150,71163] [2023-11-23 20:36:48,397 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 20:36:48,463 INFO L206 MainTranslator]: Completed translation [2023-11-23 20:36:48,463 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:36:48 WrapperNode [2023-11-23 20:36:48,464 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-23 20:36:48,465 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-23 20:36:48,465 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-23 20:36:48,466 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-23 20:36:48,496 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:36:48" (1/1) ... [2023-11-23 20:36:48,577 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:36:48" (1/1) ... [2023-11-23 20:36:48,651 INFO L138 Inliner]: procedures = 94, calls = 342, calls flagged for inlining = 29, calls inlined = 26, statements flattened = 897 [2023-11-23 20:36:48,663 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-23 20:36:48,664 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-23 20:36:48,664 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-23 20:36:48,665 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-23 20:36:48,676 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:36:48" (1/1) ... [2023-11-23 20:36:48,677 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:36:48" (1/1) ... [2023-11-23 20:36:48,695 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:36:48" (1/1) ... [2023-11-23 20:36:48,695 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:36:48" (1/1) ... [2023-11-23 20:36:48,727 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:36:48" (1/1) ... [2023-11-23 20:36:48,743 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:36:48" (1/1) ... [2023-11-23 20:36:48,748 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:36:48" (1/1) ... [2023-11-23 20:36:48,755 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:36:48" (1/1) ... [2023-11-23 20:36:48,765 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-23 20:36:48,766 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-23 20:36:48,766 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-23 20:36:48,766 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-23 20:36:48,767 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:36:48" (1/1) ... [2023-11-23 20:36:48,787 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 20:36:48,816 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8097af62-d56c-4bce-a9c2-9f28fdc954ee/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 20:36:48,837 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8097af62-d56c-4bce-a9c2-9f28fdc954ee/bin/utaipan-verify-mE87zJ7Ire/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-23 20:36:48,846 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8097af62-d56c-4bce-a9c2-9f28fdc954ee/bin/utaipan-verify-mE87zJ7Ire/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-23 20:36:48,878 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-23 20:36:48,879 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor__wrappee__twothirdsfull [2023-11-23 20:36:48,879 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor__wrappee__twothirdsfull [2023-11-23 20:36:48,879 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2023-11-23 20:36:48,879 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2023-11-23 20:36:48,880 INFO L130 BoogieDeclarations]: Found specification of procedure bigMacCall [2023-11-23 20:36:48,880 INFO L138 BoogieDeclarations]: Found implementation of procedure bigMacCall [2023-11-23 20:36:48,880 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2023-11-23 20:36:48,880 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2023-11-23 20:36:48,880 INFO L130 BoogieDeclarations]: Found specification of procedure isExecutiveFloorCalling [2023-11-23 20:36:48,880 INFO L138 BoogieDeclarations]: Found implementation of procedure isExecutiveFloorCalling [2023-11-23 20:36:48,881 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2023-11-23 20:36:48,881 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2023-11-23 20:36:48,881 INFO L130 BoogieDeclarations]: Found specification of procedure bobCall [2023-11-23 20:36:48,881 INFO L138 BoogieDeclarations]: Found implementation of procedure bobCall [2023-11-23 20:36:48,881 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2023-11-23 20:36:48,881 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2023-11-23 20:36:48,882 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection__wrappee__empty [2023-11-23 20:36:48,882 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection__wrappee__empty [2023-11-23 20:36:48,882 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2023-11-23 20:36:48,882 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2023-11-23 20:36:48,882 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2023-11-23 20:36:48,882 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2023-11-23 20:36:48,882 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2023-11-23 20:36:48,882 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2023-11-23 20:36:48,883 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2023-11-23 20:36:48,883 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2023-11-23 20:36:48,883 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2023-11-23 20:36:48,883 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2023-11-23 20:36:48,883 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2023-11-23 20:36:48,883 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2023-11-23 20:36:48,883 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2023-11-23 20:36:48,884 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2023-11-23 20:36:48,884 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2023-11-23 20:36:48,884 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2023-11-23 20:36:48,884 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2023-11-23 20:36:48,884 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2023-11-23 20:36:48,884 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2023-11-23 20:36:48,885 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2023-11-23 20:36:48,885 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2023-11-23 20:36:48,885 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2023-11-23 20:36:48,885 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-23 20:36:48,885 INFO L130 BoogieDeclarations]: Found specification of procedure buttonForFloorIsPressed [2023-11-23 20:36:48,885 INFO L138 BoogieDeclarations]: Found implementation of procedure buttonForFloorIsPressed [2023-11-23 20:36:48,886 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2023-11-23 20:36:48,886 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2023-11-23 20:36:48,886 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2023-11-23 20:36:48,886 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2023-11-23 20:36:48,886 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2023-11-23 20:36:48,886 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2023-11-23 20:36:48,887 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-23 20:36:48,887 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-23 20:36:48,887 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2023-11-23 20:36:48,887 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2023-11-23 20:36:49,050 INFO L241 CfgBuilder]: Building ICFG [2023-11-23 20:36:49,053 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-23 20:36:50,333 INFO L282 CfgBuilder]: Performing block encoding [2023-11-23 20:36:51,337 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-23 20:36:51,337 INFO L309 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-23 20:36:51,339 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 08:36:51 BoogieIcfgContainer [2023-11-23 20:36:51,339 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-23 20:36:51,342 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-23 20:36:51,342 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-23 20:36:51,346 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-23 20:36:51,346 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 08:36:47" (1/3) ... [2023-11-23 20:36:51,347 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@650489fa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 08:36:51, skipping insertion in model container [2023-11-23 20:36:51,347 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:36:48" (2/3) ... [2023-11-23 20:36:51,348 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@650489fa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 08:36:51, skipping insertion in model container [2023-11-23 20:36:51,348 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 08:36:51" (3/3) ... [2023-11-23 20:36:51,349 INFO L112 eAbstractionObserver]: Analyzing ICFG elevator_spec14_product31.cil.c [2023-11-23 20:36:51,375 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-23 20:36:51,375 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-23 20:36:51,439 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-23 20:36:51,446 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;@8bb9add, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-23 20:36:51,447 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-23 20:36:51,453 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) [2023-11-23 20:36:51,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2023-11-23 20:36:51,478 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:36:51,479 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] [2023-11-23 20:36:51,480 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 20:36:51,485 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:36:51,485 INFO L85 PathProgramCache]: Analyzing trace with hash -634397853, now seen corresponding path program 1 times [2023-11-23 20:36:51,495 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:36:51,496 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1944823600] [2023-11-23 20:36:51,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:36:51,496 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:36:51,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:36:52,404 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-11-23 20:36:52,405 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:36:52,405 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1944823600] [2023-11-23 20:36:52,406 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1944823600] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 20:36:52,406 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 20:36:52,407 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-23 20:36:52,408 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [990420201] [2023-11-23 20:36:52,409 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:36:52,416 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-23 20:36:52,416 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:36:52,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-23 20:36:52,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-23 20:36:52,468 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) [2023-11-23 20:36:53,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:36:53,385 INFO L93 Difference]: Finished difference Result 1106 states and 1750 transitions. [2023-11-23 20:36:53,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-23 20:36:53,388 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 [2023-11-23 20:36:53,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:36:53,409 INFO L225 Difference]: With dead ends: 1106 [2023-11-23 20:36:53,409 INFO L226 Difference]: Without dead ends: 731 [2023-11-23 20:36:53,419 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 [2023-11-23 20:36:53,423 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 [2023-11-23 20:36:53,424 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] [2023-11-23 20:36:53,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 731 states. [2023-11-23 20:36:53,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 731 to 725. [2023-11-23 20:36:53,581 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) [2023-11-23 20:36:53,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 725 states to 725 states and 1138 transitions. [2023-11-23 20:36:53,593 INFO L78 Accepts]: Start accepts. Automaton has 725 states and 1138 transitions. Word has length 73 [2023-11-23 20:36:53,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:36:53,594 INFO L495 AbstractCegarLoop]: Abstraction has 725 states and 1138 transitions. [2023-11-23 20:36:53,595 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) [2023-11-23 20:36:53,595 INFO L276 IsEmpty]: Start isEmpty. Operand 725 states and 1138 transitions. [2023-11-23 20:36:53,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2023-11-23 20:36:53,601 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:36:53,601 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] [2023-11-23 20:36:53,602 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-23 20:36:53,602 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 20:36:53,603 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:36:53,603 INFO L85 PathProgramCache]: Analyzing trace with hash 1627808248, now seen corresponding path program 1 times [2023-11-23 20:36:53,604 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:36:53,604 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [840665537] [2023-11-23 20:36:53,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:36:53,604 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:36:53,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:36:54,085 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-11-23 20:36:54,086 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:36:54,088 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [840665537] [2023-11-23 20:36:54,088 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [840665537] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 20:36:54,091 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 20:36:54,092 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-23 20:36:54,092 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1011109657] [2023-11-23 20:36:54,093 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:36:54,094 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-23 20:36:54,095 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:36:54,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-23 20:36:54,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-23 20:36:54,096 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) [2023-11-23 20:36:54,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:36:54,858 INFO L93 Difference]: Finished difference Result 831 states and 1277 transitions. [2023-11-23 20:36:54,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-23 20:36:54,859 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 [2023-11-23 20:36:54,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:36:54,871 INFO L225 Difference]: With dead ends: 831 [2023-11-23 20:36:54,872 INFO L226 Difference]: Without dead ends: 829 [2023-11-23 20:36:54,877 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 [2023-11-23 20:36:54,879 INFO L413 NwaCegarLoop]: 655 mSDtfsCounter, 682 mSDsluCounter, 1049 mSDsCounter, 0 mSdLazyCounter, 423 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s 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, 0.7s IncrementalHoareTripleChecker+Time [2023-11-23 20:36:54,881 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [682 Valid, 1704 Invalid, 427 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 423 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-23 20:36:54,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 829 states. [2023-11-23 20:36:54,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 829 to 822. [2023-11-23 20:36:54,970 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) [2023-11-23 20:36:54,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 822 states to 822 states and 1267 transitions. [2023-11-23 20:36:54,986 INFO L78 Accepts]: Start accepts. Automaton has 822 states and 1267 transitions. Word has length 77 [2023-11-23 20:36:54,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:36:54,991 INFO L495 AbstractCegarLoop]: Abstraction has 822 states and 1267 transitions. [2023-11-23 20:36:54,991 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) [2023-11-23 20:36:54,992 INFO L276 IsEmpty]: Start isEmpty. Operand 822 states and 1267 transitions. [2023-11-23 20:36:55,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2023-11-23 20:36:55,001 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:36:55,002 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] [2023-11-23 20:36:55,002 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-23 20:36:55,002 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 20:36:55,003 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:36:55,003 INFO L85 PathProgramCache]: Analyzing trace with hash -1582319697, now seen corresponding path program 1 times [2023-11-23 20:36:55,003 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:36:55,003 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1424320929] [2023-11-23 20:36:55,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:36:55,004 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:36:55,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:36:55,324 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2023-11-23 20:36:55,324 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:36:55,324 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1424320929] [2023-11-23 20:36:55,325 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1424320929] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 20:36:55,325 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 20:36:55,325 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-23 20:36:55,326 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [820014564] [2023-11-23 20:36:55,326 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:36:55,326 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-23 20:36:55,327 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:36:55,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-23 20:36:55,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-23 20:36:55,328 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) [2023-11-23 20:36:55,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:36:55,573 INFO L93 Difference]: Finished difference Result 1670 states and 2603 transitions. [2023-11-23 20:36:55,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-23 20:36:55,574 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 [2023-11-23 20:36:55,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:36:55,581 INFO L225 Difference]: With dead ends: 1670 [2023-11-23 20:36:55,581 INFO L226 Difference]: Without dead ends: 860 [2023-11-23 20:36:55,589 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-23 20:36:55,590 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 [2023-11-23 20:36:55,591 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] [2023-11-23 20:36:55,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 860 states. [2023-11-23 20:36:55,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 860 to 826. [2023-11-23 20:36:55,648 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) [2023-11-23 20:36:55,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 826 states to 826 states and 1271 transitions. [2023-11-23 20:36:55,662 INFO L78 Accepts]: Start accepts. Automaton has 826 states and 1271 transitions. Word has length 108 [2023-11-23 20:36:55,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:36:55,662 INFO L495 AbstractCegarLoop]: Abstraction has 826 states and 1271 transitions. [2023-11-23 20:36:55,663 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) [2023-11-23 20:36:55,663 INFO L276 IsEmpty]: Start isEmpty. Operand 826 states and 1271 transitions. [2023-11-23 20:36:55,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2023-11-23 20:36:55,668 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:36:55,668 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] [2023-11-23 20:36:55,669 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-23 20:36:55,669 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 20:36:55,669 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:36:55,670 INFO L85 PathProgramCache]: Analyzing trace with hash -518821978, now seen corresponding path program 1 times [2023-11-23 20:36:55,670 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:36:55,670 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [658712408] [2023-11-23 20:36:55,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:36:55,671 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:36:55,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:36:55,959 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2023-11-23 20:36:55,960 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:36:55,960 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [658712408] [2023-11-23 20:36:55,960 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [658712408] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 20:36:55,961 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [318923864] [2023-11-23 20:36:55,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:36:55,961 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 20:36:55,961 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8097af62-d56c-4bce-a9c2-9f28fdc954ee/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 20:36:55,963 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8097af62-d56c-4bce-a9c2-9f28fdc954ee/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 20:36:55,968 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8097af62-d56c-4bce-a9c2-9f28fdc954ee/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-23 20:36:56,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:36:56,314 INFO L262 TraceCheckSpWp]: Trace formula consists of 1275 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-23 20:36:56,329 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 20:36:56,418 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 52 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2023-11-23 20:36:56,421 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 20:36:56,422 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [318923864] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 20:36:56,422 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-23 20:36:56,422 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 7 [2023-11-23 20:36:56,423 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [796614492] [2023-11-23 20:36:56,423 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:36:56,424 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-23 20:36:56,424 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:36:56,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-23 20:36:56,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-11-23 20:36:56,425 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) [2023-11-23 20:36:56,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:36:56,803 INFO L93 Difference]: Finished difference Result 1718 states and 2692 transitions. [2023-11-23 20:36:56,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-23 20:36:56,804 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 [2023-11-23 20:36:56,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:36:56,813 INFO L225 Difference]: With dead ends: 1718 [2023-11-23 20:36:56,814 INFO L226 Difference]: Without dead ends: 904 [2023-11-23 20:36:56,825 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-11-23 20:36:56,833 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 [2023-11-23 20:36:56,834 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] [2023-11-23 20:36:56,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 904 states. [2023-11-23 20:36:56,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 904 to 904. [2023-11-23 20:36:56,934 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) [2023-11-23 20:36:56,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 904 states to 904 states and 1417 transitions. [2023-11-23 20:36:56,947 INFO L78 Accepts]: Start accepts. Automaton has 904 states and 1417 transitions. Word has length 115 [2023-11-23 20:36:56,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:36:56,948 INFO L495 AbstractCegarLoop]: Abstraction has 904 states and 1417 transitions. [2023-11-23 20:36:56,949 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) [2023-11-23 20:36:56,949 INFO L276 IsEmpty]: Start isEmpty. Operand 904 states and 1417 transitions. [2023-11-23 20:36:56,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2023-11-23 20:36:56,955 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:36:56,955 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] [2023-11-23 20:36:56,978 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8097af62-d56c-4bce-a9c2-9f28fdc954ee/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-11-23 20:36:57,175 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8097af62-d56c-4bce-a9c2-9f28fdc954ee/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 20:36:57,176 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 20:36:57,176 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:36:57,177 INFO L85 PathProgramCache]: Analyzing trace with hash 1660922622, now seen corresponding path program 1 times [2023-11-23 20:36:57,177 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:36:57,177 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2092170206] [2023-11-23 20:36:57,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:36:57,177 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:36:57,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:36:57,463 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 9 proven. 15 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2023-11-23 20:36:57,463 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:36:57,463 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2092170206] [2023-11-23 20:36:57,464 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2092170206] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 20:36:57,464 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [44138062] [2023-11-23 20:36:57,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:36:57,464 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 20:36:57,465 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8097af62-d56c-4bce-a9c2-9f28fdc954ee/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 20:36:57,466 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8097af62-d56c-4bce-a9c2-9f28fdc954ee/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 20:36:57,487 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8097af62-d56c-4bce-a9c2-9f28fdc954ee/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-23 20:36:57,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:36:57,794 INFO L262 TraceCheckSpWp]: Trace formula consists of 1280 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-23 20:36:57,802 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 20:36:57,835 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 68 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2023-11-23 20:36:57,835 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 20:36:57,835 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [44138062] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 20:36:57,835 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-23 20:36:57,836 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2023-11-23 20:36:57,836 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [277806822] [2023-11-23 20:36:57,836 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:36:57,837 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-23 20:36:57,837 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:36:57,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-23 20:36:57,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-23 20:36:57,838 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) [2023-11-23 20:36:58,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:36:58,252 INFO L93 Difference]: Finished difference Result 1874 states and 2982 transitions. [2023-11-23 20:36:58,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-23 20:36:58,253 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 [2023-11-23 20:36:58,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:36:58,263 INFO L225 Difference]: With dead ends: 1874 [2023-11-23 20:36:58,263 INFO L226 Difference]: Without dead ends: 982 [2023-11-23 20:36:58,270 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 [2023-11-23 20:36:58,273 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 [2023-11-23 20:36:58,273 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] [2023-11-23 20:36:58,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 982 states. [2023-11-23 20:36:58,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 982 to 982. [2023-11-23 20:36:58,328 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) [2023-11-23 20:36:58,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 982 states to 982 states and 1563 transitions. [2023-11-23 20:36:58,341 INFO L78 Accepts]: Start accepts. Automaton has 982 states and 1563 transitions. Word has length 120 [2023-11-23 20:36:58,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:36:58,342 INFO L495 AbstractCegarLoop]: Abstraction has 982 states and 1563 transitions. [2023-11-23 20:36:58,342 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) [2023-11-23 20:36:58,342 INFO L276 IsEmpty]: Start isEmpty. Operand 982 states and 1563 transitions. [2023-11-23 20:36:58,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2023-11-23 20:36:58,348 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:36:58,348 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] [2023-11-23 20:36:58,380 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8097af62-d56c-4bce-a9c2-9f28fdc954ee/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-23 20:36:58,575 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8097af62-d56c-4bce-a9c2-9f28fdc954ee/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 20:36:58,576 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 20:36:58,576 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:36:58,576 INFO L85 PathProgramCache]: Analyzing trace with hash 1061413550, now seen corresponding path program 1 times [2023-11-23 20:36:58,577 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:36:58,577 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [801566928] [2023-11-23 20:36:58,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:36:58,577 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:36:58,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:36:58,780 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 15 proven. 12 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2023-11-23 20:36:58,780 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:36:58,781 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [801566928] [2023-11-23 20:36:58,781 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [801566928] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 20:36:58,781 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1231520066] [2023-11-23 20:36:58,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:36:58,781 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 20:36:58,782 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8097af62-d56c-4bce-a9c2-9f28fdc954ee/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 20:36:58,783 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8097af62-d56c-4bce-a9c2-9f28fdc954ee/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 20:36:58,799 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8097af62-d56c-4bce-a9c2-9f28fdc954ee/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-23 20:36:59,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:36:59,101 INFO L262 TraceCheckSpWp]: Trace formula consists of 1284 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-23 20:36:59,107 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 20:36:59,137 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 73 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-11-23 20:36:59,137 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 20:36:59,137 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1231520066] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 20:36:59,138 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-23 20:36:59,138 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2023-11-23 20:36:59,138 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [580289934] [2023-11-23 20:36:59,138 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:36:59,139 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-23 20:36:59,139 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:36:59,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-23 20:36:59,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-23 20:36:59,140 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) [2023-11-23 20:36:59,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:36:59,543 INFO L93 Difference]: Finished difference Result 2030 states and 3272 transitions. [2023-11-23 20:36:59,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-23 20:36:59,544 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 [2023-11-23 20:36:59,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:36:59,564 INFO L225 Difference]: With dead ends: 2030 [2023-11-23 20:36:59,564 INFO L226 Difference]: Without dead ends: 1060 [2023-11-23 20:36:59,575 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 [2023-11-23 20:36:59,577 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 [2023-11-23 20:36:59,577 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] [2023-11-23 20:36:59,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1060 states. [2023-11-23 20:36:59,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1060 to 1060. [2023-11-23 20:36:59,648 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) [2023-11-23 20:36:59,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1060 states to 1060 states and 1709 transitions. [2023-11-23 20:36:59,663 INFO L78 Accepts]: Start accepts. Automaton has 1060 states and 1709 transitions. Word has length 124 [2023-11-23 20:36:59,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:36:59,664 INFO L495 AbstractCegarLoop]: Abstraction has 1060 states and 1709 transitions. [2023-11-23 20:36:59,665 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) [2023-11-23 20:36:59,665 INFO L276 IsEmpty]: Start isEmpty. Operand 1060 states and 1709 transitions. [2023-11-23 20:36:59,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2023-11-23 20:36:59,675 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:36:59,675 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] [2023-11-23 20:36:59,706 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8097af62-d56c-4bce-a9c2-9f28fdc954ee/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-23 20:36:59,897 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8097af62-d56c-4bce-a9c2-9f28fdc954ee/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-11-23 20:36:59,897 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 20:36:59,898 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:36:59,898 INFO L85 PathProgramCache]: Analyzing trace with hash 2085186054, now seen corresponding path program 1 times [2023-11-23 20:36:59,898 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:36:59,898 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1878658043] [2023-11-23 20:36:59,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:36:59,899 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:36:59,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:37:00,167 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 22 proven. 7 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2023-11-23 20:37:00,168 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:37:00,168 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1878658043] [2023-11-23 20:37:00,168 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1878658043] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 20:37:00,168 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [186465659] [2023-11-23 20:37:00,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:37:00,169 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 20:37:00,169 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8097af62-d56c-4bce-a9c2-9f28fdc954ee/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 20:37:00,170 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8097af62-d56c-4bce-a9c2-9f28fdc954ee/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 20:37:00,191 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8097af62-d56c-4bce-a9c2-9f28fdc954ee/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-23 20:37:00,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:37:00,481 INFO L262 TraceCheckSpWp]: Trace formula consists of 1287 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-23 20:37:00,486 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 20:37:00,522 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 64 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2023-11-23 20:37:00,523 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 20:37:00,523 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [186465659] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 20:37:00,523 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-23 20:37:00,523 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2023-11-23 20:37:00,524 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [462502994] [2023-11-23 20:37:00,524 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:37:00,525 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-23 20:37:00,525 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:37:00,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-23 20:37:00,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-23 20:37:00,526 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) [2023-11-23 20:37:00,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:37:00,918 INFO L93 Difference]: Finished difference Result 2186 states and 3562 transitions. [2023-11-23 20:37:00,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-23 20:37:00,919 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 [2023-11-23 20:37:00,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:37:00,929 INFO L225 Difference]: With dead ends: 2186 [2023-11-23 20:37:00,929 INFO L226 Difference]: Without dead ends: 1138 [2023-11-23 20:37:00,937 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 [2023-11-23 20:37:00,938 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 [2023-11-23 20:37:00,939 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] [2023-11-23 20:37:00,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1138 states. [2023-11-23 20:37:01,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1138 to 1138. [2023-11-23 20:37:01,005 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) [2023-11-23 20:37:01,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1138 states to 1138 states and 1855 transitions. [2023-11-23 20:37:01,019 INFO L78 Accepts]: Start accepts. Automaton has 1138 states and 1855 transitions. Word has length 127 [2023-11-23 20:37:01,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:37:01,020 INFO L495 AbstractCegarLoop]: Abstraction has 1138 states and 1855 transitions. [2023-11-23 20:37:01,021 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) [2023-11-23 20:37:01,021 INFO L276 IsEmpty]: Start isEmpty. Operand 1138 states and 1855 transitions. [2023-11-23 20:37:01,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2023-11-23 20:37:01,029 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:37:01,030 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] [2023-11-23 20:37:01,059 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8097af62-d56c-4bce-a9c2-9f28fdc954ee/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-23 20:37:01,243 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8097af62-d56c-4bce-a9c2-9f28fdc954ee/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2023-11-23 20:37:01,244 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 20:37:01,244 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:37:01,244 INFO L85 PathProgramCache]: Analyzing trace with hash 41798550, now seen corresponding path program 1 times [2023-11-23 20:37:01,245 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:37:01,245 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2120727279] [2023-11-23 20:37:01,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:37:01,245 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:37:01,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:37:05,487 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 1 proven. 31 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2023-11-23 20:37:05,487 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:37:05,488 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2120727279] [2023-11-23 20:37:05,488 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2120727279] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 20:37:05,488 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1087414272] [2023-11-23 20:37:05,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:37:05,488 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 20:37:05,488 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8097af62-d56c-4bce-a9c2-9f28fdc954ee/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 20:37:05,496 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8097af62-d56c-4bce-a9c2-9f28fdc954ee/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 20:37:05,498 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8097af62-d56c-4bce-a9c2-9f28fdc954ee/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-23 20:37:05,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:37:05,810 INFO L262 TraceCheckSpWp]: Trace formula consists of 1289 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-23 20:37:05,815 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 20:37:05,900 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 38 proven. 0 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2023-11-23 20:37:05,901 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 20:37:05,901 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1087414272] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 20:37:05,901 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-23 20:37:05,901 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [35] total 37 [2023-11-23 20:37:05,902 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1701463936] [2023-11-23 20:37:05,902 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:37:05,902 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-23 20:37:05,902 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:37:05,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-23 20:37:05,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=1220, Unknown=0, NotChecked=0, Total=1332 [2023-11-23 20:37:05,904 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) [2023-11-23 20:37:06,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:37:06,260 INFO L93 Difference]: Finished difference Result 2342 states and 3852 transitions. [2023-11-23 20:37:06,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-23 20:37:06,261 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 [2023-11-23 20:37:06,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:37:06,273 INFO L225 Difference]: With dead ends: 2342 [2023-11-23 20:37:06,273 INFO L226 Difference]: Without dead ends: 1216 [2023-11-23 20:37:06,282 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=116, Invalid=1290, Unknown=0, NotChecked=0, Total=1406 [2023-11-23 20:37:06,284 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, 0.2s IncrementalHoareTripleChecker+Time [2023-11-23 20:37:06,284 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [205 Valid, 1395 Invalid, 259 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 230 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-23 20:37:06,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1216 states. [2023-11-23 20:37:06,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1216 to 1216. [2023-11-23 20:37:06,342 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) [2023-11-23 20:37:06,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1216 states to 1216 states and 2001 transitions. [2023-11-23 20:37:06,383 INFO L78 Accepts]: Start accepts. Automaton has 1216 states and 2001 transitions. Word has length 129 [2023-11-23 20:37:06,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:37:06,384 INFO L495 AbstractCegarLoop]: Abstraction has 1216 states and 2001 transitions. [2023-11-23 20:37:06,384 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) [2023-11-23 20:37:06,385 INFO L276 IsEmpty]: Start isEmpty. Operand 1216 states and 2001 transitions. [2023-11-23 20:37:06,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2023-11-23 20:37:06,391 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:37:06,391 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] [2023-11-23 20:37:06,420 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8097af62-d56c-4bce-a9c2-9f28fdc954ee/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-23 20:37:06,620 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8097af62-d56c-4bce-a9c2-9f28fdc954ee/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 20:37:06,621 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 20:37:06,621 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:37:06,621 INFO L85 PathProgramCache]: Analyzing trace with hash -1480857915, now seen corresponding path program 1 times [2023-11-23 20:37:06,622 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:37:06,622 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2002066921] [2023-11-23 20:37:06,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:37:06,622 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:37:06,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:37:06,897 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2023-11-23 20:37:06,898 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:37:06,898 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2002066921] [2023-11-23 20:37:06,898 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2002066921] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 20:37:06,898 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 20:37:06,898 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-23 20:37:06,899 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1852947354] [2023-11-23 20:37:06,899 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:37:06,899 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-23 20:37:06,899 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:37:06,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-23 20:37:06,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-23 20:37:06,901 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) [2023-11-23 20:37:07,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:37:07,555 INFO L93 Difference]: Finished difference Result 2504 states and 4108 transitions. [2023-11-23 20:37:07,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-23 20:37:07,556 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 [2023-11-23 20:37:07,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:37:07,565 INFO L225 Difference]: With dead ends: 2504 [2023-11-23 20:37:07,565 INFO L226 Difference]: Without dead ends: 1113 [2023-11-23 20:37:07,574 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 [2023-11-23 20:37:07,576 INFO L413 NwaCegarLoop]: 545 mSDtfsCounter, 695 mSDsluCounter, 1985 mSDsCounter, 0 mSdLazyCounter, 561 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s 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, 0.5s IncrementalHoareTripleChecker+Time [2023-11-23 20:37:07,577 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [695 Valid, 2530 Invalid, 640 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 561 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-23 20:37:07,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1113 states. [2023-11-23 20:37:07,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1113 to 1090. [2023-11-23 20:37:07,646 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) [2023-11-23 20:37:07,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1090 states to 1090 states and 1694 transitions. [2023-11-23 20:37:07,655 INFO L78 Accepts]: Start accepts. Automaton has 1090 states and 1694 transitions. Word has length 129 [2023-11-23 20:37:07,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:37:07,656 INFO L495 AbstractCegarLoop]: Abstraction has 1090 states and 1694 transitions. [2023-11-23 20:37:07,656 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) [2023-11-23 20:37:07,656 INFO L276 IsEmpty]: Start isEmpty. Operand 1090 states and 1694 transitions. [2023-11-23 20:37:07,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2023-11-23 20:37:07,662 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:37:07,662 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] [2023-11-23 20:37:07,662 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-23 20:37:07,662 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 20:37:07,663 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:37:07,663 INFO L85 PathProgramCache]: Analyzing trace with hash 465885118, now seen corresponding path program 1 times [2023-11-23 20:37:07,663 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:37:07,663 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [626793729] [2023-11-23 20:37:07,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:37:07,664 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:37:07,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:37:11,324 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 1 proven. 31 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2023-11-23 20:37:11,324 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:37:11,325 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [626793729] [2023-11-23 20:37:11,325 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [626793729] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 20:37:11,325 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1153233931] [2023-11-23 20:37:11,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:37:11,325 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 20:37:11,325 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8097af62-d56c-4bce-a9c2-9f28fdc954ee/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 20:37:11,326 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8097af62-d56c-4bce-a9c2-9f28fdc954ee/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 20:37:11,347 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8097af62-d56c-4bce-a9c2-9f28fdc954ee/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-23 20:37:11,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:37:11,671 INFO L262 TraceCheckSpWp]: Trace formula consists of 1290 conjuncts, 54 conjunts are in the unsatisfiable core [2023-11-23 20:37:11,682 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 20:37:14,083 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2023-11-23 20:37:14,084 INFO L327 TraceCheckSpWp]: Computing backward predicates...