./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/elevator_spec3_product17.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70b98492-576d-4d4e-8440-3c3809be8f9e/bin/utaipan-verify-nQ1chXbOIh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70b98492-576d-4d4e-8440-3c3809be8f9e/bin/utaipan-verify-nQ1chXbOIh/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70b98492-576d-4d4e-8440-3c3809be8f9e/bin/utaipan-verify-nQ1chXbOIh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70b98492-576d-4d4e-8440-3c3809be8f9e/bin/utaipan-verify-nQ1chXbOIh/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec3_product17.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70b98492-576d-4d4e-8440-3c3809be8f9e/bin/utaipan-verify-nQ1chXbOIh/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70b98492-576d-4d4e-8440-3c3809be8f9e/bin/utaipan-verify-nQ1chXbOIh --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash c169527384ebd2beb44494ef6b1cbc32334198d2b76d2236e6ced79c84ed026c --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-12-02 18:39:23,013 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-02 18:39:23,078 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70b98492-576d-4d4e-8440-3c3809be8f9e/bin/utaipan-verify-nQ1chXbOIh/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-12-02 18:39:23,083 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-02 18:39:23,083 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-12-02 18:39:23,108 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-02 18:39:23,108 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-12-02 18:39:23,109 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-12-02 18:39:23,110 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-02 18:39:23,110 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-02 18:39:23,111 INFO L153 SettingsManager]: * User list type=DISABLED [2023-12-02 18:39:23,111 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-12-02 18:39:23,112 INFO L153 SettingsManager]: * Explicit value domain=true [2023-12-02 18:39:23,112 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-12-02 18:39:23,113 INFO L153 SettingsManager]: * Octagon Domain=false [2023-12-02 18:39:23,113 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-12-02 18:39:23,114 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-12-02 18:39:23,114 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-12-02 18:39:23,115 INFO L153 SettingsManager]: * Interval Domain=false [2023-12-02 18:39:23,115 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-12-02 18:39:23,116 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-12-02 18:39:23,117 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-12-02 18:39:23,117 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-02 18:39:23,118 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-12-02 18:39:23,118 INFO L153 SettingsManager]: * sizeof long=4 [2023-12-02 18:39:23,119 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-02 18:39:23,119 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-12-02 18:39:23,120 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-02 18:39:23,120 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-12-02 18:39:23,121 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-02 18:39:23,121 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-12-02 18:39:23,121 INFO L153 SettingsManager]: * sizeof long double=12 [2023-12-02 18:39:23,122 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-12-02 18:39:23,122 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-02 18:39:23,122 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-02 18:39:23,122 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-12-02 18:39:23,123 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-02 18:39:23,123 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 18:39:23,123 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-02 18:39:23,123 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-02 18:39:23,124 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-12-02 18:39:23,124 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-12-02 18:39:23,124 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-12-02 18:39:23,124 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-02 18:39:23,125 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-12-02 18:39:23,125 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-12-02 18:39:23,125 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-12-02 18:39:23,125 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_70b98492-576d-4d4e-8440-3c3809be8f9e/bin/utaipan-verify-nQ1chXbOIh/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70b98492-576d-4d4e-8440-3c3809be8f9e/bin/utaipan-verify-nQ1chXbOIh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c169527384ebd2beb44494ef6b1cbc32334198d2b76d2236e6ced79c84ed026c [2023-12-02 18:39:23,341 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-02 18:39:23,360 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-02 18:39:23,363 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-02 18:39:23,364 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-02 18:39:23,365 INFO L274 PluginConnector]: CDTParser initialized [2023-12-02 18:39:23,366 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70b98492-576d-4d4e-8440-3c3809be8f9e/bin/utaipan-verify-nQ1chXbOIh/../../sv-benchmarks/c/product-lines/elevator_spec3_product17.cil.c [2023-12-02 18:39:26,146 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-02 18:39:26,420 INFO L384 CDTParser]: Found 1 translation units. [2023-12-02 18:39:26,421 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70b98492-576d-4d4e-8440-3c3809be8f9e/sv-benchmarks/c/product-lines/elevator_spec3_product17.cil.c [2023-12-02 18:39:26,444 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70b98492-576d-4d4e-8440-3c3809be8f9e/bin/utaipan-verify-nQ1chXbOIh/data/8c5aba521/ba9094edfcaf4c60921baf565a479dd9/FLAG5ab7e2ed8 [2023-12-02 18:39:26,459 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70b98492-576d-4d4e-8440-3c3809be8f9e/bin/utaipan-verify-nQ1chXbOIh/data/8c5aba521/ba9094edfcaf4c60921baf565a479dd9 [2023-12-02 18:39:26,461 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-02 18:39:26,463 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-12-02 18:39:26,464 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-02 18:39:26,464 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-02 18:39:26,469 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-02 18:39:26,470 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 06:39:26" (1/1) ... [2023-12-02 18:39:26,471 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@155934a2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:39:26, skipping insertion in model container [2023-12-02 18:39:26,471 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 06:39:26" (1/1) ... [2023-12-02 18:39:26,560 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-02 18:39:26,751 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_70b98492-576d-4d4e-8440-3c3809be8f9e/sv-benchmarks/c/product-lines/elevator_spec3_product17.cil.c[5770,5783] [2023-12-02 18:39:26,998 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 18:39:27,011 INFO L202 MainTranslator]: Completed pre-run [2023-12-02 18:39:27,021 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"scenario.i","") [48] [2023-12-02 18:39:27,022 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Specification3_spec.i","") [67] [2023-12-02 18:39:27,023 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"wsllib_check.i","") [259] [2023-12-02 18:39:27,023 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"UnitTests.i","") [268] [2023-12-02 18:39:27,023 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Floor.i","") [366] [2023-12-02 18:39:27,023 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"libacc.i","") [1033] [2023-12-02 18:39:27,024 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Elevator.i","") [1399] [2023-12-02 18:39:27,024 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Test.i","") [2844] [2023-12-02 18:39:27,024 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Person.i","") [3195] [2023-12-02 18:39:27,024 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"featureselect.i","") [3313] [2023-12-02 18:39:27,035 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_70b98492-576d-4d4e-8440-3c3809be8f9e/sv-benchmarks/c/product-lines/elevator_spec3_product17.cil.c[5770,5783] [2023-12-02 18:39:27,142 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 18:39:27,169 INFO L206 MainTranslator]: Completed translation [2023-12-02 18:39:27,169 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:39:27 WrapperNode [2023-12-02 18:39:27,169 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-02 18:39:27,170 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-02 18:39:27,171 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-02 18:39:27,171 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-02 18:39:27,178 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:39:27" (1/1) ... [2023-12-02 18:39:27,204 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:39:27" (1/1) ... [2023-12-02 18:39:27,254 INFO L138 Inliner]: procedures = 88, calls = 338, calls flagged for inlining = 23, calls inlined = 20, statements flattened = 797 [2023-12-02 18:39:27,254 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-02 18:39:27,255 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-02 18:39:27,255 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-02 18:39:27,255 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-02 18:39:27,264 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:39:27" (1/1) ... [2023-12-02 18:39:27,264 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:39:27" (1/1) ... [2023-12-02 18:39:27,269 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:39:27" (1/1) ... [2023-12-02 18:39:27,270 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:39:27" (1/1) ... [2023-12-02 18:39:27,293 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:39:27" (1/1) ... [2023-12-02 18:39:27,308 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:39:27" (1/1) ... [2023-12-02 18:39:27,314 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:39:27" (1/1) ... [2023-12-02 18:39:27,320 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:39:27" (1/1) ... [2023-12-02 18:39:27,330 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-02 18:39:27,331 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-02 18:39:27,332 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-02 18:39:27,332 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-02 18:39:27,333 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:39:27" (1/1) ... [2023-12-02 18:39:27,339 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 18:39:27,356 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70b98492-576d-4d4e-8440-3c3809be8f9e/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 18:39:27,373 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70b98492-576d-4d4e-8440-3c3809be8f9e/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-12-02 18:39:27,377 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70b98492-576d-4d4e-8440-3c3809be8f9e/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-12-02 18:39:27,407 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-02 18:39:27,407 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentHeading [2023-12-02 18:39:27,407 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentHeading [2023-12-02 18:39:27,407 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2023-12-02 18:39:27,408 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2023-12-02 18:39:27,408 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2023-12-02 18:39:27,408 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2023-12-02 18:39:27,408 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2023-12-02 18:39:27,408 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2023-12-02 18:39:27,409 INFO L130 BoogieDeclarations]: Found specification of procedure bobCall [2023-12-02 18:39:27,409 INFO L138 BoogieDeclarations]: Found implementation of procedure bobCall [2023-12-02 18:39:27,409 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2023-12-02 18:39:27,409 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2023-12-02 18:39:27,409 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2023-12-02 18:39:27,410 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2023-12-02 18:39:27,410 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2023-12-02 18:39:27,410 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2023-12-02 18:39:27,410 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2023-12-02 18:39:27,410 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2023-12-02 18:39:27,410 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2023-12-02 18:39:27,411 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2023-12-02 18:39:27,411 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2023-12-02 18:39:27,411 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2023-12-02 18:39:27,411 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2023-12-02 18:39:27,411 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2023-12-02 18:39:27,411 INFO L130 BoogieDeclarations]: Found specification of procedure initTopDown [2023-12-02 18:39:27,412 INFO L138 BoogieDeclarations]: Found implementation of procedure initTopDown [2023-12-02 18:39:27,412 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2023-12-02 18:39:27,412 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2023-12-02 18:39:27,412 INFO L130 BoogieDeclarations]: Found specification of procedure initFloors [2023-12-02 18:39:27,412 INFO L138 BoogieDeclarations]: Found implementation of procedure initFloors [2023-12-02 18:39:27,412 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2023-12-02 18:39:27,413 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2023-12-02 18:39:27,413 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2023-12-02 18:39:27,413 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2023-12-02 18:39:27,413 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2023-12-02 18:39:27,413 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2023-12-02 18:39:27,413 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2023-12-02 18:39:27,414 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2023-12-02 18:39:27,414 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-12-02 18:39:27,414 INFO L130 BoogieDeclarations]: Found specification of procedure buttonForFloorIsPressed [2023-12-02 18:39:27,414 INFO L138 BoogieDeclarations]: Found implementation of procedure buttonForFloorIsPressed [2023-12-02 18:39:27,414 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2023-12-02 18:39:27,414 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2023-12-02 18:39:27,414 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2023-12-02 18:39:27,414 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2023-12-02 18:39:27,414 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2023-12-02 18:39:27,414 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2023-12-02 18:39:27,415 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-02 18:39:27,415 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-02 18:39:27,415 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2023-12-02 18:39:27,415 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2023-12-02 18:39:27,564 INFO L241 CfgBuilder]: Building ICFG [2023-12-02 18:39:27,567 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-02 18:39:28,500 INFO L282 CfgBuilder]: Performing block encoding [2023-12-02 18:39:29,224 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-02 18:39:29,225 INFO L309 CfgBuilder]: Removed 1 assume(true) statements. [2023-12-02 18:39:29,227 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 06:39:29 BoogieIcfgContainer [2023-12-02 18:39:29,227 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-02 18:39:29,229 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-02 18:39:29,230 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-02 18:39:29,233 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-02 18:39:29,233 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.12 06:39:26" (1/3) ... [2023-12-02 18:39:29,234 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7886fda6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 06:39:29, skipping insertion in model container [2023-12-02 18:39:29,234 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:39:27" (2/3) ... [2023-12-02 18:39:29,234 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7886fda6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 06:39:29, skipping insertion in model container [2023-12-02 18:39:29,235 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 06:39:29" (3/3) ... [2023-12-02 18:39:29,236 INFO L112 eAbstractionObserver]: Analyzing ICFG elevator_spec3_product17.cil.c [2023-12-02 18:39:29,255 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-02 18:39:29,255 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-12-02 18:39:29,314 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-02 18:39:29,321 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;@194b8e7d, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-02 18:39:29,321 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-12-02 18:39:29,328 INFO L276 IsEmpty]: Start isEmpty. Operand has 383 states, 257 states have (on average 1.5914396887159532) internal successors, (409), 275 states have internal predecessors, (409), 100 states have call successors, (100), 24 states have call predecessors, (100), 24 states have return successors, (100), 97 states have call predecessors, (100), 100 states have call successors, (100) [2023-12-02 18:39:29,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2023-12-02 18:39:29,347 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:39:29,348 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-12-02 18:39:29,348 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 18:39:29,353 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:39:29,354 INFO L85 PathProgramCache]: Analyzing trace with hash 1593585822, now seen corresponding path program 1 times [2023-12-02 18:39:29,364 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 18:39:29,364 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1356714268] [2023-12-02 18:39:29,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:39:29,365 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 18:39:29,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:39:30,072 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-02 18:39:30,072 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 18:39:30,072 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1356714268] [2023-12-02 18:39:30,073 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1356714268] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 18:39:30,073 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1667005381] [2023-12-02 18:39:30,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:39:30,074 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:39:30,074 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70b98492-576d-4d4e-8440-3c3809be8f9e/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 18:39:30,077 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70b98492-576d-4d4e-8440-3c3809be8f9e/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 18:39:30,078 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70b98492-576d-4d4e-8440-3c3809be8f9e/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-12-02 18:39:30,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:39:30,459 INFO L262 TraceCheckSpWp]: Trace formula consists of 1512 conjuncts, 2 conjunts are in the unsatisfiable core [2023-12-02 18:39:30,469 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:39:30,527 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 18:39:30,528 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 18:39:30,528 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1667005381] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 18:39:30,528 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 18:39:30,529 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2023-12-02 18:39:30,531 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1964772870] [2023-12-02 18:39:30,531 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 18:39:30,536 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 18:39:30,536 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 18:39:30,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 18:39:30,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-12-02 18:39:30,569 INFO L87 Difference]: Start difference. First operand has 383 states, 257 states have (on average 1.5914396887159532) internal successors, (409), 275 states have internal predecessors, (409), 100 states have call successors, (100), 24 states have call predecessors, (100), 24 states have return successors, (100), 97 states have call predecessors, (100), 100 states have call successors, (100) Second operand has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 3 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2023-12-02 18:39:30,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:39:30,868 INFO L93 Difference]: Finished difference Result 1074 states and 1734 transitions. [2023-12-02 18:39:30,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 18:39:30,870 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 3 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 64 [2023-12-02 18:39:30,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:39:30,889 INFO L225 Difference]: With dead ends: 1074 [2023-12-02 18:39:30,889 INFO L226 Difference]: Without dead ends: 693 [2023-12-02 18:39:30,899 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-12-02 18:39:30,901 INFO L413 NwaCegarLoop]: 984 mSDtfsCounter, 492 mSDsluCounter, 551 mSDsCounter, 0 mSdLazyCounter, 113 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 492 SdHoareTripleChecker+Valid, 1535 SdHoareTripleChecker+Invalid, 119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 18:39:30,902 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [492 Valid, 1535 Invalid, 119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 113 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-02 18:39:30,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 693 states. [2023-12-02 18:39:31,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 693 to 681. [2023-12-02 18:39:31,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 681 states, 462 states have (on average 1.5844155844155845) internal successors, (732), 493 states have internal predecessors, (732), 176 states have call successors, (176), 43 states have call predecessors, (176), 42 states have return successors, (178), 170 states have call predecessors, (178), 173 states have call successors, (178) [2023-12-02 18:39:31,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 681 states to 681 states and 1086 transitions. [2023-12-02 18:39:31,019 INFO L78 Accepts]: Start accepts. Automaton has 681 states and 1086 transitions. Word has length 64 [2023-12-02 18:39:31,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:39:31,020 INFO L495 AbstractCegarLoop]: Abstraction has 681 states and 1086 transitions. [2023-12-02 18:39:31,020 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 3 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2023-12-02 18:39:31,020 INFO L276 IsEmpty]: Start isEmpty. Operand 681 states and 1086 transitions. [2023-12-02 18:39:31,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2023-12-02 18:39:31,027 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:39:31,028 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-12-02 18:39:31,037 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70b98492-576d-4d4e-8440-3c3809be8f9e/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-12-02 18:39:31,229 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70b98492-576d-4d4e-8440-3c3809be8f9e/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-12-02 18:39:31,230 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 18:39:31,230 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:39:31,231 INFO L85 PathProgramCache]: Analyzing trace with hash 587561269, now seen corresponding path program 1 times [2023-12-02 18:39:31,231 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 18:39:31,231 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [288659633] [2023-12-02 18:39:31,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:39:31,231 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 18:39:31,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:39:31,571 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-02 18:39:31,571 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 18:39:31,571 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [288659633] [2023-12-02 18:39:31,572 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [288659633] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 18:39:31,572 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1375186863] [2023-12-02 18:39:31,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:39:31,573 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:39:31,573 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70b98492-576d-4d4e-8440-3c3809be8f9e/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 18:39:31,574 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70b98492-576d-4d4e-8440-3c3809be8f9e/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 18:39:31,577 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70b98492-576d-4d4e-8440-3c3809be8f9e/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-12-02 18:39:31,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:39:31,914 INFO L262 TraceCheckSpWp]: Trace formula consists of 1500 conjuncts, 2 conjunts are in the unsatisfiable core [2023-12-02 18:39:31,921 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:39:31,974 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 18:39:31,974 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 18:39:31,974 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1375186863] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 18:39:31,974 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 18:39:31,974 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2023-12-02 18:39:31,975 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [892016208] [2023-12-02 18:39:31,975 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 18:39:31,975 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 18:39:31,975 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 18:39:31,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 18:39:31,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-12-02 18:39:31,977 INFO L87 Difference]: Start difference. First operand 681 states and 1086 transitions. Second operand has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2023-12-02 18:39:32,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:39:32,176 INFO L93 Difference]: Finished difference Result 1666 states and 2688 transitions. [2023-12-02 18:39:32,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 18:39:32,177 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 63 [2023-12-02 18:39:32,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:39:32,187 INFO L225 Difference]: With dead ends: 1666 [2023-12-02 18:39:32,187 INFO L226 Difference]: Without dead ends: 997 [2023-12-02 18:39:32,192 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-12-02 18:39:32,194 INFO L413 NwaCegarLoop]: 560 mSDtfsCounter, 549 mSDsluCounter, 473 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 549 SdHoareTripleChecker+Valid, 1033 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 18:39:32,195 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [549 Valid, 1033 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 18:39:32,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 997 states. [2023-12-02 18:39:32,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 997 to 973. [2023-12-02 18:39:32,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 973 states, 664 states have (on average 1.5933734939759037) internal successors, (1058), 710 states have internal predecessors, (1058), 249 states have call successors, (249), 59 states have call predecessors, (249), 59 states have return successors, (256), 242 states have call predecessors, (256), 246 states have call successors, (256) [2023-12-02 18:39:32,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 973 states to 973 states and 1563 transitions. [2023-12-02 18:39:32,260 INFO L78 Accepts]: Start accepts. Automaton has 973 states and 1563 transitions. Word has length 63 [2023-12-02 18:39:32,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:39:32,261 INFO L495 AbstractCegarLoop]: Abstraction has 973 states and 1563 transitions. [2023-12-02 18:39:32,261 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2023-12-02 18:39:32,261 INFO L276 IsEmpty]: Start isEmpty. Operand 973 states and 1563 transitions. [2023-12-02 18:39:32,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2023-12-02 18:39:32,266 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:39:32,266 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-12-02 18:39:32,272 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70b98492-576d-4d4e-8440-3c3809be8f9e/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-12-02 18:39:32,467 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70b98492-576d-4d4e-8440-3c3809be8f9e/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:39:32,467 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 18:39:32,468 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:39:32,468 INFO L85 PathProgramCache]: Analyzing trace with hash -1243175374, now seen corresponding path program 1 times [2023-12-02 18:39:32,468 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 18:39:32,468 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1496075839] [2023-12-02 18:39:32,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:39:32,469 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 18:39:32,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:39:32,931 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-02 18:39:32,932 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 18:39:32,932 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1496075839] [2023-12-02 18:39:32,932 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1496075839] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 18:39:32,933 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1604531830] [2023-12-02 18:39:32,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:39:32,933 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:39:32,933 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70b98492-576d-4d4e-8440-3c3809be8f9e/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 18:39:32,936 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70b98492-576d-4d4e-8440-3c3809be8f9e/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 18:39:32,939 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70b98492-576d-4d4e-8440-3c3809be8f9e/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-12-02 18:39:33,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:39:33,256 INFO L262 TraceCheckSpWp]: Trace formula consists of 1511 conjuncts, 4 conjunts are in the unsatisfiable core [2023-12-02 18:39:33,261 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:39:33,341 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 18:39:33,341 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 18:39:33,342 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1604531830] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 18:39:33,342 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 18:39:33,342 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [8] total 9 [2023-12-02 18:39:33,342 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [182335482] [2023-12-02 18:39:33,342 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 18:39:33,343 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 18:39:33,343 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 18:39:33,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 18:39:33,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2023-12-02 18:39:33,344 INFO L87 Difference]: Start difference. First operand 973 states and 1563 transitions. Second operand has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 3 states have call successors, (13), 3 states have call predecessors, (13), 2 states have return successors, (11), 2 states have call predecessors, (11), 3 states have call successors, (11) [2023-12-02 18:39:33,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:39:33,687 INFO L93 Difference]: Finished difference Result 2778 states and 4510 transitions. [2023-12-02 18:39:33,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 18:39:33,688 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 3 states have call successors, (13), 3 states have call predecessors, (13), 2 states have return successors, (11), 2 states have call predecessors, (11), 3 states have call successors, (11) Word has length 64 [2023-12-02 18:39:33,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:39:33,703 INFO L225 Difference]: With dead ends: 2778 [2023-12-02 18:39:33,703 INFO L226 Difference]: Without dead ends: 1817 [2023-12-02 18:39:33,711 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2023-12-02 18:39:33,712 INFO L413 NwaCegarLoop]: 608 mSDtfsCounter, 481 mSDsluCounter, 485 mSDsCounter, 0 mSdLazyCounter, 165 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 481 SdHoareTripleChecker+Valid, 1093 SdHoareTripleChecker+Invalid, 186 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 165 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 18:39:33,713 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [481 Valid, 1093 Invalid, 186 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 165 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-02 18:39:33,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1817 states. [2023-12-02 18:39:33,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1817 to 1795. [2023-12-02 18:39:33,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1795 states, 1216 states have (on average 1.544407894736842) internal successors, (1878), 1306 states have internal predecessors, (1878), 468 states have call successors, (468), 112 states have call predecessors, (468), 110 states have return successors, (503), 451 states have call predecessors, (503), 464 states have call successors, (503) [2023-12-02 18:39:33,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1795 states to 1795 states and 2849 transitions. [2023-12-02 18:39:33,841 INFO L78 Accepts]: Start accepts. Automaton has 1795 states and 2849 transitions. Word has length 64 [2023-12-02 18:39:33,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:39:33,841 INFO L495 AbstractCegarLoop]: Abstraction has 1795 states and 2849 transitions. [2023-12-02 18:39:33,842 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 3 states have call successors, (13), 3 states have call predecessors, (13), 2 states have return successors, (11), 2 states have call predecessors, (11), 3 states have call successors, (11) [2023-12-02 18:39:33,842 INFO L276 IsEmpty]: Start isEmpty. Operand 1795 states and 2849 transitions. [2023-12-02 18:39:33,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2023-12-02 18:39:33,845 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:39:33,845 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-12-02 18:39:33,853 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70b98492-576d-4d4e-8440-3c3809be8f9e/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-12-02 18:39:34,047 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70b98492-576d-4d4e-8440-3c3809be8f9e/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:39:34,047 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 18:39:34,048 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:39:34,048 INFO L85 PathProgramCache]: Analyzing trace with hash -85380606, now seen corresponding path program 1 times [2023-12-02 18:39:34,048 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 18:39:34,048 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1544917981] [2023-12-02 18:39:34,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:39:34,048 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 18:39:34,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:39:34,386 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-02 18:39:34,386 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 18:39:34,387 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1544917981] [2023-12-02 18:39:34,387 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1544917981] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 18:39:34,387 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [597793195] [2023-12-02 18:39:34,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:39:34,387 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:39:34,387 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70b98492-576d-4d4e-8440-3c3809be8f9e/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 18:39:34,390 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70b98492-576d-4d4e-8440-3c3809be8f9e/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 18:39:34,395 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70b98492-576d-4d4e-8440-3c3809be8f9e/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-12-02 18:39:34,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:39:34,711 INFO L262 TraceCheckSpWp]: Trace formula consists of 1527 conjuncts, 4 conjunts are in the unsatisfiable core [2023-12-02 18:39:34,716 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:39:34,744 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 18:39:34,744 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 18:39:34,744 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [597793195] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 18:39:34,744 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 18:39:34,744 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [8] total 10 [2023-12-02 18:39:34,745 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [814011941] [2023-12-02 18:39:34,745 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 18:39:34,745 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 18:39:34,745 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 18:39:34,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 18:39:34,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2023-12-02 18:39:34,746 INFO L87 Difference]: Start difference. First operand 1795 states and 2849 transitions. Second operand has 4 states, 4 states have (on average 10.5) internal successors, (42), 4 states have internal predecessors, (42), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2023-12-02 18:39:35,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:39:35,118 INFO L93 Difference]: Finished difference Result 3490 states and 5650 transitions. [2023-12-02 18:39:35,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-02 18:39:35,119 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.5) internal successors, (42), 4 states have internal predecessors, (42), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) Word has length 68 [2023-12-02 18:39:35,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:39:35,139 INFO L225 Difference]: With dead ends: 3490 [2023-12-02 18:39:35,139 INFO L226 Difference]: Without dead ends: 2337 [2023-12-02 18:39:35,149 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2023-12-02 18:39:35,150 INFO L413 NwaCegarLoop]: 581 mSDtfsCounter, 139 mSDsluCounter, 1135 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 1716 SdHoareTripleChecker+Invalid, 205 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 18:39:35,150 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [139 Valid, 1716 Invalid, 205 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 115 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-02 18:39:35,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2337 states. [2023-12-02 18:39:35,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2337 to 2071. [2023-12-02 18:39:35,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2071 states, 1358 states have (on average 1.5316642120765833) internal successors, (2080), 1487 states have internal predecessors, (2080), 599 states have call successors, (599), 112 states have call predecessors, (599), 113 states have return successors, (646), 582 states have call predecessors, (646), 595 states have call successors, (646) [2023-12-02 18:39:35,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2071 states to 2071 states and 3325 transitions. [2023-12-02 18:39:35,358 INFO L78 Accepts]: Start accepts. Automaton has 2071 states and 3325 transitions. Word has length 68 [2023-12-02 18:39:35,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:39:35,358 INFO L495 AbstractCegarLoop]: Abstraction has 2071 states and 3325 transitions. [2023-12-02 18:39:35,359 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.5) internal successors, (42), 4 states have internal predecessors, (42), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2023-12-02 18:39:35,359 INFO L276 IsEmpty]: Start isEmpty. Operand 2071 states and 3325 transitions. [2023-12-02 18:39:35,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2023-12-02 18:39:35,362 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:39:35,362 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 18:39:35,370 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70b98492-576d-4d4e-8440-3c3809be8f9e/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-12-02 18:39:35,563 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70b98492-576d-4d4e-8440-3c3809be8f9e/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:39:35,563 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 18:39:35,563 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:39:35,563 INFO L85 PathProgramCache]: Analyzing trace with hash -377728026, now seen corresponding path program 1 times [2023-12-02 18:39:35,563 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 18:39:35,564 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1994176560] [2023-12-02 18:39:35,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:39:35,564 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 18:39:35,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:39:35,888 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-12-02 18:39:35,888 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 18:39:35,888 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1994176560] [2023-12-02 18:39:35,888 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1994176560] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 18:39:35,888 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2119073810] [2023-12-02 18:39:35,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:39:35,889 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:39:35,889 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70b98492-576d-4d4e-8440-3c3809be8f9e/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 18:39:35,890 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70b98492-576d-4d4e-8440-3c3809be8f9e/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 18:39:35,916 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70b98492-576d-4d4e-8440-3c3809be8f9e/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-12-02 18:39:36,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:39:36,262 INFO L262 TraceCheckSpWp]: Trace formula consists of 1538 conjuncts, 6 conjunts are in the unsatisfiable core [2023-12-02 18:39:36,268 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:39:36,398 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-02 18:39:36,399 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 18:39:36,399 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2119073810] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 18:39:36,399 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 18:39:36,399 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 9 [2023-12-02 18:39:36,399 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1739674351] [2023-12-02 18:39:36,400 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 18:39:36,400 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-02 18:39:36,400 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 18:39:36,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-02 18:39:36,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2023-12-02 18:39:36,401 INFO L87 Difference]: Start difference. First operand 2071 states and 3325 transitions. Second operand has 5 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 4 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (13), 3 states have call predecessors, (13), 4 states have call successors, (13) [2023-12-02 18:39:37,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:39:37,155 INFO L93 Difference]: Finished difference Result 3726 states and 5957 transitions. [2023-12-02 18:39:37,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-02 18:39:37,156 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 4 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (13), 3 states have call predecessors, (13), 4 states have call successors, (13) Word has length 72 [2023-12-02 18:39:37,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:39:37,175 INFO L225 Difference]: With dead ends: 3726 [2023-12-02 18:39:37,175 INFO L226 Difference]: Without dead ends: 2306 [2023-12-02 18:39:37,187 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2023-12-02 18:39:37,188 INFO L413 NwaCegarLoop]: 637 mSDtfsCounter, 539 mSDsluCounter, 1072 mSDsCounter, 0 mSdLazyCounter, 514 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 547 SdHoareTripleChecker+Valid, 1709 SdHoareTripleChecker+Invalid, 520 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 514 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-12-02 18:39:37,188 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [547 Valid, 1709 Invalid, 520 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 514 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-12-02 18:39:37,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2306 states. [2023-12-02 18:39:37,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2306 to 2287. [2023-12-02 18:39:37,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2287 states, 1532 states have (on average 1.5163185378590078) internal successors, (2323), 1664 states have internal predecessors, (2323), 626 states have call successors, (626), 124 states have call predecessors, (626), 128 states have return successors, (676), 609 states have call predecessors, (676), 622 states have call successors, (676) [2023-12-02 18:39:37,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2287 states to 2287 states and 3625 transitions. [2023-12-02 18:39:37,370 INFO L78 Accepts]: Start accepts. Automaton has 2287 states and 3625 transitions. Word has length 72 [2023-12-02 18:39:37,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:39:37,371 INFO L495 AbstractCegarLoop]: Abstraction has 2287 states and 3625 transitions. [2023-12-02 18:39:37,371 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 4 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (13), 3 states have call predecessors, (13), 4 states have call successors, (13) [2023-12-02 18:39:37,371 INFO L276 IsEmpty]: Start isEmpty. Operand 2287 states and 3625 transitions. [2023-12-02 18:39:37,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2023-12-02 18:39:37,375 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:39:37,375 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 18:39:37,383 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70b98492-576d-4d4e-8440-3c3809be8f9e/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-12-02 18:39:37,575 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70b98492-576d-4d4e-8440-3c3809be8f9e/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:39:37,576 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 18:39:37,576 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:39:37,576 INFO L85 PathProgramCache]: Analyzing trace with hash -123319056, now seen corresponding path program 1 times [2023-12-02 18:39:37,576 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 18:39:37,576 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1364940644] [2023-12-02 18:39:37,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:39:37,577 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 18:39:37,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:39:37,829 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-12-02 18:39:37,829 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 18:39:37,830 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1364940644] [2023-12-02 18:39:37,830 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1364940644] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 18:39:37,830 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [946106739] [2023-12-02 18:39:37,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:39:37,830 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:39:37,830 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70b98492-576d-4d4e-8440-3c3809be8f9e/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 18:39:37,831 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70b98492-576d-4d4e-8440-3c3809be8f9e/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 18:39:37,834 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70b98492-576d-4d4e-8440-3c3809be8f9e/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-12-02 18:39:38,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:39:38,137 INFO L262 TraceCheckSpWp]: Trace formula consists of 1527 conjuncts, 3 conjunts are in the unsatisfiable core [2023-12-02 18:39:38,141 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:39:38,173 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-02 18:39:38,173 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 18:39:38,173 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [946106739] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 18:39:38,173 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 18:39:38,174 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 8 [2023-12-02 18:39:38,174 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1003482433] [2023-12-02 18:39:38,174 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 18:39:38,175 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 18:39:38,175 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 18:39:38,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 18:39:38,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-12-02 18:39:38,176 INFO L87 Difference]: Start difference. First operand 2287 states and 3625 transitions. Second operand has 4 states, 4 states have (on average 11.5) internal successors, (46), 4 states have internal predecessors, (46), 2 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2023-12-02 18:39:38,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:39:38,499 INFO L93 Difference]: Finished difference Result 4310 states and 6908 transitions. [2023-12-02 18:39:38,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-02 18:39:38,500 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.5) internal successors, (46), 4 states have internal predecessors, (46), 2 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) Word has length 73 [2023-12-02 18:39:38,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:39:38,518 INFO L225 Difference]: With dead ends: 4310 [2023-12-02 18:39:38,518 INFO L226 Difference]: Without dead ends: 2287 [2023-12-02 18:39:38,532 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2023-12-02 18:39:38,533 INFO L413 NwaCegarLoop]: 583 mSDtfsCounter, 282 mSDsluCounter, 952 mSDsCounter, 0 mSdLazyCounter, 167 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 293 SdHoareTripleChecker+Valid, 1535 SdHoareTripleChecker+Invalid, 193 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 167 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 18:39:38,533 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [293 Valid, 1535 Invalid, 193 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 167 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-02 18:39:38,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2287 states. [2023-12-02 18:39:38,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2287 to 2287. [2023-12-02 18:39:38,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2287 states, 1532 states have (on average 1.481070496083551) internal successors, (2269), 1664 states have internal predecessors, (2269), 626 states have call successors, (626), 124 states have call predecessors, (626), 128 states have return successors, (676), 609 states have call predecessors, (676), 622 states have call successors, (676) [2023-12-02 18:39:38,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2287 states to 2287 states and 3571 transitions. [2023-12-02 18:39:38,685 INFO L78 Accepts]: Start accepts. Automaton has 2287 states and 3571 transitions. Word has length 73 [2023-12-02 18:39:38,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:39:38,685 INFO L495 AbstractCegarLoop]: Abstraction has 2287 states and 3571 transitions. [2023-12-02 18:39:38,685 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.5) internal successors, (46), 4 states have internal predecessors, (46), 2 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2023-12-02 18:39:38,686 INFO L276 IsEmpty]: Start isEmpty. Operand 2287 states and 3571 transitions. [2023-12-02 18:39:38,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2023-12-02 18:39:38,689 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:39:38,689 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 18:39:38,697 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70b98492-576d-4d4e-8440-3c3809be8f9e/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-12-02 18:39:38,890 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70b98492-576d-4d4e-8440-3c3809be8f9e/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:39:38,890 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 18:39:38,890 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:39:38,890 INFO L85 PathProgramCache]: Analyzing trace with hash 928321124, now seen corresponding path program 1 times [2023-12-02 18:39:38,890 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 18:39:38,890 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1725973257] [2023-12-02 18:39:38,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:39:38,891 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 18:39:38,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:39:39,166 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-12-02 18:39:39,167 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 18:39:39,167 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1725973257] [2023-12-02 18:39:39,167 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1725973257] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 18:39:39,167 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1249013260] [2023-12-02 18:39:39,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:39:39,167 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:39:39,167 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70b98492-576d-4d4e-8440-3c3809be8f9e/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 18:39:39,168 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70b98492-576d-4d4e-8440-3c3809be8f9e/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 18:39:39,171 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70b98492-576d-4d4e-8440-3c3809be8f9e/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-12-02 18:39:39,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:39:39,487 INFO L262 TraceCheckSpWp]: Trace formula consists of 1537 conjuncts, 17 conjunts are in the unsatisfiable core [2023-12-02 18:39:39,492 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:39:39,691 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-02 18:39:39,691 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 18:39:39,917 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-12-02 18:39:39,917 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1249013260] provided 1 perfect and 1 imperfect interpolant sequences [2023-12-02 18:39:39,917 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-12-02 18:39:39,918 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [6, 9] total 16 [2023-12-02 18:39:39,918 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [18775151] [2023-12-02 18:39:39,918 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 18:39:39,918 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-12-02 18:39:39,918 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 18:39:39,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-12-02 18:39:39,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2023-12-02 18:39:39,919 INFO L87 Difference]: Start difference. First operand 2287 states and 3571 transitions. Second operand has 9 states, 8 states have (on average 5.625) internal successors, (45), 8 states have internal predecessors, (45), 4 states have call successors, (15), 4 states have call predecessors, (15), 4 states have return successors, (13), 4 states have call predecessors, (13), 3 states have call successors, (13) [2023-12-02 18:39:42,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:39:42,720 INFO L93 Difference]: Finished difference Result 5619 states and 9003 transitions. [2023-12-02 18:39:42,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-12-02 18:39:42,721 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 5.625) internal successors, (45), 8 states have internal predecessors, (45), 4 states have call successors, (15), 4 states have call predecessors, (15), 4 states have return successors, (13), 4 states have call predecessors, (13), 3 states have call successors, (13) Word has length 75 [2023-12-02 18:39:42,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:39:42,755 INFO L225 Difference]: With dead ends: 5619 [2023-12-02 18:39:42,756 INFO L226 Difference]: Without dead ends: 4200 [2023-12-02 18:39:42,768 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=145, Invalid=725, Unknown=0, NotChecked=0, Total=870 [2023-12-02 18:39:42,769 INFO L413 NwaCegarLoop]: 625 mSDtfsCounter, 1794 mSDsluCounter, 2427 mSDsCounter, 0 mSdLazyCounter, 2156 mSolverCounterSat, 806 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1874 SdHoareTripleChecker+Valid, 3052 SdHoareTripleChecker+Invalid, 2962 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 806 IncrementalHoareTripleChecker+Valid, 2156 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2023-12-02 18:39:42,769 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1874 Valid, 3052 Invalid, 2962 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [806 Valid, 2156 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2023-12-02 18:39:42,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4200 states. [2023-12-02 18:39:43,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4200 to 3559. [2023-12-02 18:39:43,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3559 states, 2529 states have (on average 1.4887307236061684) internal successors, (3765), 2672 states have internal predecessors, (3765), 802 states have call successors, (802), 216 states have call predecessors, (802), 227 states have return successors, (973), 778 states have call predecessors, (973), 797 states have call successors, (973) [2023-12-02 18:39:43,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3559 states to 3559 states and 5540 transitions. [2023-12-02 18:39:43,072 INFO L78 Accepts]: Start accepts. Automaton has 3559 states and 5540 transitions. Word has length 75 [2023-12-02 18:39:43,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:39:43,072 INFO L495 AbstractCegarLoop]: Abstraction has 3559 states and 5540 transitions. [2023-12-02 18:39:43,072 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 5.625) internal successors, (45), 8 states have internal predecessors, (45), 4 states have call successors, (15), 4 states have call predecessors, (15), 4 states have return successors, (13), 4 states have call predecessors, (13), 3 states have call successors, (13) [2023-12-02 18:39:43,072 INFO L276 IsEmpty]: Start isEmpty. Operand 3559 states and 5540 transitions. [2023-12-02 18:39:43,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2023-12-02 18:39:43,076 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:39:43,076 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 18:39:43,083 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70b98492-576d-4d4e-8440-3c3809be8f9e/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-12-02 18:39:43,278 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70b98492-576d-4d4e-8440-3c3809be8f9e/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:39:43,278 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 18:39:43,279 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:39:43,279 INFO L85 PathProgramCache]: Analyzing trace with hash -1267124505, now seen corresponding path program 1 times [2023-12-02 18:39:43,279 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 18:39:43,279 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2027756645] [2023-12-02 18:39:43,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:39:43,279 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 18:39:43,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:39:43,523 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-12-02 18:39:43,523 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 18:39:43,524 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2027756645] [2023-12-02 18:39:43,524 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2027756645] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 18:39:43,524 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [236314280] [2023-12-02 18:39:43,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:39:43,524 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:39:43,524 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70b98492-576d-4d4e-8440-3c3809be8f9e/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 18:39:43,525 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70b98492-576d-4d4e-8440-3c3809be8f9e/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 18:39:43,528 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70b98492-576d-4d4e-8440-3c3809be8f9e/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-12-02 18:39:43,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:39:43,857 INFO L262 TraceCheckSpWp]: Trace formula consists of 1539 conjuncts, 7 conjunts are in the unsatisfiable core [2023-12-02 18:39:43,860 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:39:43,899 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-02 18:39:43,899 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 18:39:43,899 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [236314280] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 18:39:43,899 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 18:39:43,899 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 8 [2023-12-02 18:39:43,899 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2066286143] [2023-12-02 18:39:43,900 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 18:39:43,900 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 18:39:43,900 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 18:39:43,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 18:39:43,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-12-02 18:39:43,901 INFO L87 Difference]: Start difference. First operand 3559 states and 5540 transitions. Second operand has 4 states, 4 states have (on average 11.5) internal successors, (46), 4 states have internal predecessors, (46), 4 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (13), 3 states have call predecessors, (13), 4 states have call successors, (13) [2023-12-02 18:39:44,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:39:44,312 INFO L93 Difference]: Finished difference Result 6884 states and 10753 transitions. [2023-12-02 18:39:44,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-02 18:39:44,312 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.5) internal successors, (46), 4 states have internal predecessors, (46), 4 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (13), 3 states have call predecessors, (13), 4 states have call successors, (13) Word has length 76 [2023-12-02 18:39:44,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:39:44,337 INFO L225 Difference]: With dead ends: 6884 [2023-12-02 18:39:44,337 INFO L226 Difference]: Without dead ends: 3337 [2023-12-02 18:39:44,359 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2023-12-02 18:39:44,360 INFO L413 NwaCegarLoop]: 610 mSDtfsCounter, 479 mSDsluCounter, 1066 mSDsCounter, 0 mSdLazyCounter, 289 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 481 SdHoareTripleChecker+Valid, 1676 SdHoareTripleChecker+Invalid, 313 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 289 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 18:39:44,360 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [481 Valid, 1676 Invalid, 313 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 289 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-02 18:39:44,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3337 states. [2023-12-02 18:39:44,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3337 to 3319. [2023-12-02 18:39:44,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3319 states, 2365 states have (on average 1.4858350951374206) internal successors, (3514), 2494 states have internal predecessors, (3514), 739 states have call successors, (739), 204 states have call predecessors, (739), 214 states have return successors, (909), 716 states have call predecessors, (909), 734 states have call successors, (909) [2023-12-02 18:39:44,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3319 states to 3319 states and 5162 transitions. [2023-12-02 18:39:44,609 INFO L78 Accepts]: Start accepts. Automaton has 3319 states and 5162 transitions. Word has length 76 [2023-12-02 18:39:44,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:39:44,610 INFO L495 AbstractCegarLoop]: Abstraction has 3319 states and 5162 transitions. [2023-12-02 18:39:44,610 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.5) internal successors, (46), 4 states have internal predecessors, (46), 4 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (13), 3 states have call predecessors, (13), 4 states have call successors, (13) [2023-12-02 18:39:44,610 INFO L276 IsEmpty]: Start isEmpty. Operand 3319 states and 5162 transitions. [2023-12-02 18:39:44,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2023-12-02 18:39:44,612 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:39:44,613 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 18:39:44,620 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70b98492-576d-4d4e-8440-3c3809be8f9e/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-12-02 18:39:44,813 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70b98492-576d-4d4e-8440-3c3809be8f9e/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:39:44,813 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 18:39:44,814 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:39:44,814 INFO L85 PathProgramCache]: Analyzing trace with hash 1008686334, now seen corresponding path program 1 times [2023-12-02 18:39:44,814 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 18:39:44,814 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [789009372] [2023-12-02 18:39:44,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:39:44,814 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 18:39:44,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:39:45,020 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-12-02 18:39:45,020 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 18:39:45,020 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [789009372] [2023-12-02 18:39:45,020 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [789009372] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 18:39:45,020 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1802645324] [2023-12-02 18:39:45,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:39:45,021 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:39:45,021 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70b98492-576d-4d4e-8440-3c3809be8f9e/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 18:39:45,022 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70b98492-576d-4d4e-8440-3c3809be8f9e/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 18:39:45,027 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70b98492-576d-4d4e-8440-3c3809be8f9e/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-12-02 18:39:45,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:39:45,295 INFO L262 TraceCheckSpWp]: Trace formula consists of 1527 conjuncts, 2 conjunts are in the unsatisfiable core [2023-12-02 18:39:45,298 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:39:45,344 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-02 18:39:45,344 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 18:39:45,345 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1802645324] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 18:39:45,345 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 18:39:45,345 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2023-12-02 18:39:45,345 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1482323000] [2023-12-02 18:39:45,345 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 18:39:45,346 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 18:39:45,346 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 18:39:45,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 18:39:45,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-12-02 18:39:45,347 INFO L87 Difference]: Start difference. First operand 3319 states and 5162 transitions. Second operand has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 3 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2023-12-02 18:39:45,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:39:45,703 INFO L93 Difference]: Finished difference Result 7477 states and 11734 transitions. [2023-12-02 18:39:45,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 18:39:45,704 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 3 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) Word has length 75 [2023-12-02 18:39:45,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:39:45,740 INFO L225 Difference]: With dead ends: 7477 [2023-12-02 18:39:45,740 INFO L226 Difference]: Without dead ends: 4170 [2023-12-02 18:39:45,761 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-12-02 18:39:45,762 INFO L413 NwaCegarLoop]: 707 mSDtfsCounter, 527 mSDsluCounter, 461 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 527 SdHoareTripleChecker+Valid, 1168 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 18:39:45,763 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [527 Valid, 1168 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 18:39:45,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4170 states. [2023-12-02 18:39:45,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4170 to 3284. [2023-12-02 18:39:45,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3284 states, 2341 states have (on average 1.482699700982486) internal successors, (3471), 2470 states have internal predecessors, (3471), 732 states have call successors, (732), 201 states have call predecessors, (732), 210 states have return successors, (887), 708 states have call predecessors, (887), 727 states have call successors, (887) [2023-12-02 18:39:46,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3284 states to 3284 states and 5090 transitions. [2023-12-02 18:39:46,012 INFO L78 Accepts]: Start accepts. Automaton has 3284 states and 5090 transitions. Word has length 75 [2023-12-02 18:39:46,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:39:46,013 INFO L495 AbstractCegarLoop]: Abstraction has 3284 states and 5090 transitions. [2023-12-02 18:39:46,014 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 3 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2023-12-02 18:39:46,014 INFO L276 IsEmpty]: Start isEmpty. Operand 3284 states and 5090 transitions. [2023-12-02 18:39:46,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2023-12-02 18:39:46,017 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:39:46,017 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 18:39:46,024 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70b98492-576d-4d4e-8440-3c3809be8f9e/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-12-02 18:39:46,219 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70b98492-576d-4d4e-8440-3c3809be8f9e/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:39:46,219 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 18:39:46,219 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:39:46,219 INFO L85 PathProgramCache]: Analyzing trace with hash 113427313, now seen corresponding path program 1 times [2023-12-02 18:39:46,219 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 18:39:46,219 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1845771763] [2023-12-02 18:39:46,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:39:46,220 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 18:39:46,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:39:46,516 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-12-02 18:39:46,516 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 18:39:46,516 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1845771763] [2023-12-02 18:39:46,516 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1845771763] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 18:39:46,516 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1027935694] [2023-12-02 18:39:46,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:39:46,516 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:39:46,517 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70b98492-576d-4d4e-8440-3c3809be8f9e/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 18:39:46,518 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70b98492-576d-4d4e-8440-3c3809be8f9e/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 18:39:46,523 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70b98492-576d-4d4e-8440-3c3809be8f9e/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-12-02 18:39:46,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:39:46,830 INFO L262 TraceCheckSpWp]: Trace formula consists of 1554 conjuncts, 7 conjunts are in the unsatisfiable core [2023-12-02 18:39:46,834 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:39:46,924 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-02 18:39:46,925 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 18:39:46,925 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1027935694] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 18:39:46,925 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 18:39:46,925 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 9 [2023-12-02 18:39:46,925 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1779612572] [2023-12-02 18:39:46,925 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 18:39:46,926 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-02 18:39:46,926 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 18:39:46,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-02 18:39:46,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2023-12-02 18:39:46,927 INFO L87 Difference]: Start difference. First operand 3284 states and 5090 transitions. Second operand has 5 states, 5 states have (on average 9.4) internal successors, (47), 5 states have internal predecessors, (47), 4 states have call successors, (16), 3 states have call predecessors, (16), 4 states have return successors, (14), 3 states have call predecessors, (14), 4 states have call successors, (14) [2023-12-02 18:39:47,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:39:47,458 INFO L93 Difference]: Finished difference Result 5996 states and 9318 transitions. [2023-12-02 18:39:47,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-02 18:39:47,458 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.4) internal successors, (47), 5 states have internal predecessors, (47), 4 states have call successors, (16), 3 states have call predecessors, (16), 4 states have return successors, (14), 3 states have call predecessors, (14), 4 states have call successors, (14) Word has length 79 [2023-12-02 18:39:47,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:39:47,479 INFO L225 Difference]: With dead ends: 5996 [2023-12-02 18:39:47,479 INFO L226 Difference]: Without dead ends: 3305 [2023-12-02 18:39:47,487 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2023-12-02 18:39:47,487 INFO L413 NwaCegarLoop]: 667 mSDtfsCounter, 414 mSDsluCounter, 1694 mSDsCounter, 0 mSdLazyCounter, 378 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 414 SdHoareTripleChecker+Valid, 2361 SdHoareTripleChecker+Invalid, 384 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 378 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-02 18:39:47,487 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [414 Valid, 2361 Invalid, 384 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 378 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-02 18:39:47,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3305 states. [2023-12-02 18:39:47,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3305 to 3288. [2023-12-02 18:39:47,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3288 states, 2341 states have (on average 1.482699700982486) internal successors, (3471), 2474 states have internal predecessors, (3471), 736 states have call successors, (736), 201 states have call predecessors, (736), 210 states have return successors, (891), 708 states have call predecessors, (891), 731 states have call successors, (891) [2023-12-02 18:39:47,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3288 states to 3288 states and 5098 transitions. [2023-12-02 18:39:47,700 INFO L78 Accepts]: Start accepts. Automaton has 3288 states and 5098 transitions. Word has length 79 [2023-12-02 18:39:47,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:39:47,700 INFO L495 AbstractCegarLoop]: Abstraction has 3288 states and 5098 transitions. [2023-12-02 18:39:47,700 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.4) internal successors, (47), 5 states have internal predecessors, (47), 4 states have call successors, (16), 3 states have call predecessors, (16), 4 states have return successors, (14), 3 states have call predecessors, (14), 4 states have call successors, (14) [2023-12-02 18:39:47,700 INFO L276 IsEmpty]: Start isEmpty. Operand 3288 states and 5098 transitions. [2023-12-02 18:39:47,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2023-12-02 18:39:47,703 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:39:47,703 INFO L195 NwaCegarLoop]: trace histogram [2, 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, 1] [2023-12-02 18:39:47,709 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70b98492-576d-4d4e-8440-3c3809be8f9e/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2023-12-02 18:39:47,903 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70b98492-576d-4d4e-8440-3c3809be8f9e/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:39:47,904 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 18:39:47,904 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:39:47,904 INFO L85 PathProgramCache]: Analyzing trace with hash 436930049, now seen corresponding path program 1 times [2023-12-02 18:39:47,904 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 18:39:47,904 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [106876891] [2023-12-02 18:39:47,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:39:47,905 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 18:39:47,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:39:48,196 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-12-02 18:39:48,196 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 18:39:48,196 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [106876891] [2023-12-02 18:39:48,196 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [106876891] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 18:39:48,196 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [405857366] [2023-12-02 18:39:48,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:39:48,196 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:39:48,196 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70b98492-576d-4d4e-8440-3c3809be8f9e/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 18:39:48,197 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70b98492-576d-4d4e-8440-3c3809be8f9e/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 18:39:48,198 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70b98492-576d-4d4e-8440-3c3809be8f9e/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-12-02 18:39:48,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:39:48,492 INFO L262 TraceCheckSpWp]: Trace formula consists of 1626 conjuncts, 5 conjunts are in the unsatisfiable core [2023-12-02 18:39:48,495 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:39:48,527 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-12-02 18:39:48,527 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 18:39:48,527 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [405857366] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 18:39:48,527 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 18:39:48,527 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 9 [2023-12-02 18:39:48,528 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [178954198] [2023-12-02 18:39:48,528 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 18:39:48,528 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-02 18:39:48,528 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 18:39:48,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-02 18:39:48,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2023-12-02 18:39:48,529 INFO L87 Difference]: Start difference. First operand 3288 states and 5098 transitions. Second operand has 5 states, 5 states have (on average 11.4) internal successors, (57), 4 states have internal predecessors, (57), 2 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (18), 3 states have call predecessors, (18), 2 states have call successors, (18) [2023-12-02 18:39:48,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:39:48,837 INFO L93 Difference]: Finished difference Result 6257 states and 9837 transitions. [2023-12-02 18:39:48,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-02 18:39:48,837 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.4) internal successors, (57), 4 states have internal predecessors, (57), 2 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (18), 3 states have call predecessors, (18), 2 states have call successors, (18) Word has length 99 [2023-12-02 18:39:48,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:39:48,854 INFO L225 Difference]: With dead ends: 6257 [2023-12-02 18:39:48,854 INFO L226 Difference]: Without dead ends: 3423 [2023-12-02 18:39:48,864 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2023-12-02 18:39:48,865 INFO L413 NwaCegarLoop]: 561 mSDtfsCounter, 13 mSDsluCounter, 1655 mSDsCounter, 0 mSdLazyCounter, 155 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 2216 SdHoareTripleChecker+Invalid, 172 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 155 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 18:39:48,865 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 2216 Invalid, 172 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 155 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 18:39:48,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3423 states. [2023-12-02 18:39:49,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3423 to 3369. [2023-12-02 18:39:49,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3369 states, 2393 states have (on average 1.4730463852904305) internal successors, (3525), 2541 states have internal predecessors, (3525), 743 states have call successors, (743), 201 states have call predecessors, (743), 232 states have return successors, (990), 722 states have call predecessors, (990), 738 states have call successors, (990) [2023-12-02 18:39:49,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3369 states to 3369 states and 5258 transitions. [2023-12-02 18:39:49,059 INFO L78 Accepts]: Start accepts. Automaton has 3369 states and 5258 transitions. Word has length 99 [2023-12-02 18:39:49,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:39:49,060 INFO L495 AbstractCegarLoop]: Abstraction has 3369 states and 5258 transitions. [2023-12-02 18:39:49,060 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.4) internal successors, (57), 4 states have internal predecessors, (57), 2 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (18), 3 states have call predecessors, (18), 2 states have call successors, (18) [2023-12-02 18:39:49,060 INFO L276 IsEmpty]: Start isEmpty. Operand 3369 states and 5258 transitions. [2023-12-02 18:39:49,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2023-12-02 18:39:49,067 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:39:49,068 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2023-12-02 18:39:49,076 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70b98492-576d-4d4e-8440-3c3809be8f9e/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2023-12-02 18:39:49,268 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70b98492-576d-4d4e-8440-3c3809be8f9e/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:39:49,268 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 18:39:49,269 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:39:49,269 INFO L85 PathProgramCache]: Analyzing trace with hash -1122046179, now seen corresponding path program 1 times [2023-12-02 18:39:49,269 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 18:39:49,269 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [577340613] [2023-12-02 18:39:49,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:39:49,269 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 18:39:49,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:39:49,526 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 18 proven. 2 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2023-12-02 18:39:49,526 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 18:39:49,526 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [577340613] [2023-12-02 18:39:49,526 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [577340613] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 18:39:49,526 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [292034403] [2023-12-02 18:39:49,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:39:49,526 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:39:49,526 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70b98492-576d-4d4e-8440-3c3809be8f9e/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 18:39:49,527 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70b98492-576d-4d4e-8440-3c3809be8f9e/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 18:39:49,535 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70b98492-576d-4d4e-8440-3c3809be8f9e/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-12-02 18:39:49,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:39:49,922 INFO L262 TraceCheckSpWp]: Trace formula consists of 1861 conjuncts, 8 conjunts are in the unsatisfiable core [2023-12-02 18:39:49,928 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:39:50,046 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 39 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-12-02 18:39:50,046 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 18:39:50,047 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [292034403] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 18:39:50,047 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 18:39:50,047 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 14 [2023-12-02 18:39:50,047 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [613619106] [2023-12-02 18:39:50,047 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 18:39:50,048 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-12-02 18:39:50,048 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 18:39:50,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-12-02 18:39:50,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2023-12-02 18:39:50,049 INFO L87 Difference]: Start difference. First operand 3369 states and 5258 transitions. Second operand has 8 states, 7 states have (on average 10.571428571428571) internal successors, (74), 7 states have internal predecessors, (74), 5 states have call successors, (21), 4 states have call predecessors, (21), 5 states have return successors, (19), 5 states have call predecessors, (19), 5 states have call successors, (19) [2023-12-02 18:39:52,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:39:52,531 INFO L93 Difference]: Finished difference Result 7525 states and 11955 transitions. [2023-12-02 18:39:52,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-12-02 18:39:52,532 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 10.571428571428571) internal successors, (74), 7 states have internal predecessors, (74), 5 states have call successors, (21), 4 states have call predecessors, (21), 5 states have return successors, (19), 5 states have call predecessors, (19), 5 states have call successors, (19) Word has length 117 [2023-12-02 18:39:52,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:39:52,553 INFO L225 Difference]: With dead ends: 7525 [2023-12-02 18:39:52,553 INFO L226 Difference]: Without dead ends: 4052 [2023-12-02 18:39:52,560 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=98, Invalid=502, Unknown=0, NotChecked=0, Total=600 [2023-12-02 18:39:52,561 INFO L413 NwaCegarLoop]: 410 mSDtfsCounter, 1358 mSDsluCounter, 1286 mSDsCounter, 0 mSdLazyCounter, 3178 mSolverCounterSat, 733 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1441 SdHoareTripleChecker+Valid, 1696 SdHoareTripleChecker+Invalid, 3911 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 733 IncrementalHoareTripleChecker+Valid, 3178 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2023-12-02 18:39:52,561 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1441 Valid, 1696 Invalid, 3911 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [733 Valid, 3178 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2023-12-02 18:39:52,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4052 states. [2023-12-02 18:39:52,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4052 to 3450. [2023-12-02 18:39:52,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3450 states, 2441 states have (on average 1.4698893895944285) internal successors, (3588), 2594 states have internal predecessors, (3588), 775 states have call successors, (775), 201 states have call predecessors, (775), 233 states have return successors, (1074), 750 states have call predecessors, (1074), 770 states have call successors, (1074) [2023-12-02 18:39:52,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3450 states to 3450 states and 5437 transitions. [2023-12-02 18:39:52,766 INFO L78 Accepts]: Start accepts. Automaton has 3450 states and 5437 transitions. Word has length 117 [2023-12-02 18:39:52,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:39:52,767 INFO L495 AbstractCegarLoop]: Abstraction has 3450 states and 5437 transitions. [2023-12-02 18:39:52,767 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 10.571428571428571) internal successors, (74), 7 states have internal predecessors, (74), 5 states have call successors, (21), 4 states have call predecessors, (21), 5 states have return successors, (19), 5 states have call predecessors, (19), 5 states have call successors, (19) [2023-12-02 18:39:52,767 INFO L276 IsEmpty]: Start isEmpty. Operand 3450 states and 5437 transitions. [2023-12-02 18:39:52,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2023-12-02 18:39:52,774 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:39:52,774 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2023-12-02 18:39:52,782 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70b98492-576d-4d4e-8440-3c3809be8f9e/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2023-12-02 18:39:52,975 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70b98492-576d-4d4e-8440-3c3809be8f9e/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:39:52,975 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 18:39:52,976 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:39:52,976 INFO L85 PathProgramCache]: Analyzing trace with hash 339696730, now seen corresponding path program 1 times [2023-12-02 18:39:52,976 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 18:39:52,976 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [245069992] [2023-12-02 18:39:52,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:39:52,976 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 18:39:53,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:39:53,310 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 22 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-12-02 18:39:53,311 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 18:39:53,311 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [245069992] [2023-12-02 18:39:53,311 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [245069992] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 18:39:53,311 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1418056542] [2023-12-02 18:39:53,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:39:53,311 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:39:53,311 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70b98492-576d-4d4e-8440-3c3809be8f9e/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 18:39:53,312 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70b98492-576d-4d4e-8440-3c3809be8f9e/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 18:39:53,315 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70b98492-576d-4d4e-8440-3c3809be8f9e/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-12-02 18:39:53,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:39:53,663 INFO L262 TraceCheckSpWp]: Trace formula consists of 1872 conjuncts, 3 conjunts are in the unsatisfiable core [2023-12-02 18:39:53,668 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:39:53,721 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 49 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-12-02 18:39:53,721 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 18:39:53,721 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1418056542] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 18:39:53,721 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 18:39:53,722 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [8] total 9 [2023-12-02 18:39:53,722 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [148928842] [2023-12-02 18:39:53,722 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 18:39:53,723 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 18:39:53,723 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 18:39:53,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 18:39:53,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2023-12-02 18:39:53,724 INFO L87 Difference]: Start difference. First operand 3450 states and 5437 transitions. Second operand has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 3 states have call successors, (22), 3 states have call predecessors, (22), 3 states have return successors, (20), 3 states have call predecessors, (20), 3 states have call successors, (20) [2023-12-02 18:39:54,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:39:54,064 INFO L93 Difference]: Finished difference Result 8086 states and 12966 transitions. [2023-12-02 18:39:54,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 18:39:54,065 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 3 states have call successors, (22), 3 states have call predecessors, (22), 3 states have return successors, (20), 3 states have call predecessors, (20), 3 states have call successors, (20) Word has length 118 [2023-12-02 18:39:54,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:39:54,083 INFO L225 Difference]: With dead ends: 8086 [2023-12-02 18:39:54,083 INFO L226 Difference]: Without dead ends: 4648 [2023-12-02 18:39:54,095 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2023-12-02 18:39:54,095 INFO L413 NwaCegarLoop]: 728 mSDtfsCounter, 463 mSDsluCounter, 536 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 463 SdHoareTripleChecker+Valid, 1264 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 18:39:54,095 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [463 Valid, 1264 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 94 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 18:39:54,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4648 states. [2023-12-02 18:39:54,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4648 to 4580. [2023-12-02 18:39:54,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4580 states, 3248 states have (on average 1.4713669950738917) internal successors, (4779), 3457 states have internal predecessors, (4779), 1022 states have call successors, (1022), 263 states have call predecessors, (1022), 309 states have return successors, (1419), 991 states have call predecessors, (1419), 1017 states have call successors, (1419) [2023-12-02 18:39:54,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4580 states to 4580 states and 7220 transitions. [2023-12-02 18:39:54,356 INFO L78 Accepts]: Start accepts. Automaton has 4580 states and 7220 transitions. Word has length 118 [2023-12-02 18:39:54,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:39:54,356 INFO L495 AbstractCegarLoop]: Abstraction has 4580 states and 7220 transitions. [2023-12-02 18:39:54,356 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 3 states have call successors, (22), 3 states have call predecessors, (22), 3 states have return successors, (20), 3 states have call predecessors, (20), 3 states have call successors, (20) [2023-12-02 18:39:54,356 INFO L276 IsEmpty]: Start isEmpty. Operand 4580 states and 7220 transitions. [2023-12-02 18:39:54,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2023-12-02 18:39:54,362 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:39:54,363 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2023-12-02 18:39:54,369 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70b98492-576d-4d4e-8440-3c3809be8f9e/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2023-12-02 18:39:54,563 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70b98492-576d-4d4e-8440-3c3809be8f9e/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:39:54,563 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 18:39:54,563 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:39:54,564 INFO L85 PathProgramCache]: Analyzing trace with hash 1235135700, now seen corresponding path program 1 times [2023-12-02 18:39:54,564 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 18:39:54,564 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2040141923] [2023-12-02 18:39:54,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:39:54,564 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 18:39:54,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:39:54,888 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 25 proven. 3 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-12-02 18:39:54,888 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 18:39:54,888 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2040141923] [2023-12-02 18:39:54,888 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2040141923] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 18:39:54,889 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1269543563] [2023-12-02 18:39:54,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:39:54,889 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:39:54,889 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70b98492-576d-4d4e-8440-3c3809be8f9e/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 18:39:54,890 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70b98492-576d-4d4e-8440-3c3809be8f9e/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 18:39:54,895 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70b98492-576d-4d4e-8440-3c3809be8f9e/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-12-02 18:39:55,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:39:55,208 INFO L262 TraceCheckSpWp]: Trace formula consists of 1887 conjuncts, 5 conjunts are in the unsatisfiable core [2023-12-02 18:39:55,212 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:39:55,260 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 51 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-12-02 18:39:55,260 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 18:39:55,260 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1269543563] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 18:39:55,260 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 18:39:55,261 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [8] total 10 [2023-12-02 18:39:55,261 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [827723116] [2023-12-02 18:39:55,261 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 18:39:55,261 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 18:39:55,261 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 18:39:55,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 18:39:55,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2023-12-02 18:39:55,263 INFO L87 Difference]: Start difference. First operand 4580 states and 7220 transitions. Second operand has 4 states, 4 states have (on average 18.5) internal successors, (74), 4 states have internal predecessors, (74), 4 states have call successors, (23), 3 states have call predecessors, (23), 3 states have return successors, (21), 4 states have call predecessors, (21), 4 states have call successors, (21) [2023-12-02 18:39:56,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:39:56,187 INFO L93 Difference]: Finished difference Result 9190 states and 14819 transitions. [2023-12-02 18:39:56,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-02 18:39:56,187 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.5) internal successors, (74), 4 states have internal predecessors, (74), 4 states have call successors, (23), 3 states have call predecessors, (23), 3 states have return successors, (21), 4 states have call predecessors, (21), 4 states have call successors, (21) Word has length 123 [2023-12-02 18:39:56,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:39:56,207 INFO L225 Difference]: With dead ends: 9190 [2023-12-02 18:39:56,207 INFO L226 Difference]: Without dead ends: 5473 [2023-12-02 18:39:56,225 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2023-12-02 18:39:56,226 INFO L413 NwaCegarLoop]: 578 mSDtfsCounter, 578 mSDsluCounter, 731 mSDsCounter, 0 mSdLazyCounter, 521 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 583 SdHoareTripleChecker+Valid, 1309 SdHoareTripleChecker+Invalid, 568 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 521 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-12-02 18:39:56,226 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [583 Valid, 1309 Invalid, 568 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 521 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-12-02 18:39:56,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5473 states. [2023-12-02 18:39:56,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5473 to 5358. [2023-12-02 18:39:56,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5358 states, 3696 states have (on average 1.4650974025974026) internal successors, (5415), 3951 states have internal predecessors, (5415), 1285 states have call successors, (1285), 339 states have call predecessors, (1285), 376 states have return successors, (1735), 1247 states have call predecessors, (1735), 1278 states have call successors, (1735) [2023-12-02 18:39:56,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5358 states to 5358 states and 8435 transitions. [2023-12-02 18:39:56,684 INFO L78 Accepts]: Start accepts. Automaton has 5358 states and 8435 transitions. Word has length 123 [2023-12-02 18:39:56,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:39:56,684 INFO L495 AbstractCegarLoop]: Abstraction has 5358 states and 8435 transitions. [2023-12-02 18:39:56,684 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.5) internal successors, (74), 4 states have internal predecessors, (74), 4 states have call successors, (23), 3 states have call predecessors, (23), 3 states have return successors, (21), 4 states have call predecessors, (21), 4 states have call successors, (21) [2023-12-02 18:39:56,685 INFO L276 IsEmpty]: Start isEmpty. Operand 5358 states and 8435 transitions. [2023-12-02 18:39:56,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2023-12-02 18:39:56,690 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:39:56,690 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2023-12-02 18:39:56,696 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70b98492-576d-4d4e-8440-3c3809be8f9e/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2023-12-02 18:39:56,890 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70b98492-576d-4d4e-8440-3c3809be8f9e/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-12-02 18:39:56,890 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 18:39:56,891 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:39:56,891 INFO L85 PathProgramCache]: Analyzing trace with hash -366856417, now seen corresponding path program 1 times [2023-12-02 18:39:56,891 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 18:39:56,891 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [117440063] [2023-12-02 18:39:56,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:39:56,891 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 18:39:56,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:39:57,116 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 19 proven. 3 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-12-02 18:39:57,116 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 18:39:57,116 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [117440063] [2023-12-02 18:39:57,116 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [117440063] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 18:39:57,117 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [496935519] [2023-12-02 18:39:57,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:39:57,117 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:39:57,117 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70b98492-576d-4d4e-8440-3c3809be8f9e/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 18:39:57,118 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70b98492-576d-4d4e-8440-3c3809be8f9e/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 18:39:57,123 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70b98492-576d-4d4e-8440-3c3809be8f9e/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-12-02 18:39:57,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:39:57,453 INFO L262 TraceCheckSpWp]: Trace formula consists of 1889 conjuncts, 5 conjunts are in the unsatisfiable core [2023-12-02 18:39:57,456 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:39:57,499 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 45 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-12-02 18:39:57,499 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 18:39:57,499 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [496935519] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 18:39:57,500 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 18:39:57,500 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [8] total 10 [2023-12-02 18:39:57,500 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1849761596] [2023-12-02 18:39:57,500 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 18:39:57,500 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 18:39:57,500 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 18:39:57,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 18:39:57,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2023-12-02 18:39:57,501 INFO L87 Difference]: Start difference. First operand 5358 states and 8435 transitions. Second operand has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 4 states have call successors, (23), 3 states have call predecessors, (23), 3 states have return successors, (21), 4 states have call predecessors, (21), 4 states have call successors, (21) [2023-12-02 18:39:58,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:39:58,566 INFO L93 Difference]: Finished difference Result 12862 states and 20676 transitions. [2023-12-02 18:39:58,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-02 18:39:58,566 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), 4 states have call successors, (23), 3 states have call predecessors, (23), 3 states have return successors, (21), 4 states have call predecessors, (21), 4 states have call successors, (21) Word has length 124 [2023-12-02 18:39:58,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:39:58,597 INFO L225 Difference]: With dead ends: 12862 [2023-12-02 18:39:58,597 INFO L226 Difference]: Without dead ends: 8345 [2023-12-02 18:39:58,615 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2023-12-02 18:39:58,615 INFO L413 NwaCegarLoop]: 906 mSDtfsCounter, 524 mSDsluCounter, 1075 mSDsCounter, 0 mSdLazyCounter, 603 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 533 SdHoareTripleChecker+Valid, 1981 SdHoareTripleChecker+Invalid, 635 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 603 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-12-02 18:39:58,616 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [533 Valid, 1981 Invalid, 635 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 603 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-12-02 18:39:58,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8345 states. [2023-12-02 18:39:59,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8345 to 8329. [2023-12-02 18:39:59,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8329 states, 5631 states have (on average 1.4674125377375244) internal successors, (8263), 6057 states have internal predecessors, (8263), 2113 states have call successors, (2113), 545 states have call predecessors, (2113), 584 states have return successors, (2737), 2050 states have call predecessors, (2737), 2102 states have call successors, (2737) [2023-12-02 18:39:59,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8329 states to 8329 states and 13113 transitions. [2023-12-02 18:39:59,247 INFO L78 Accepts]: Start accepts. Automaton has 8329 states and 13113 transitions. Word has length 124 [2023-12-02 18:39:59,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:39:59,248 INFO L495 AbstractCegarLoop]: Abstraction has 8329 states and 13113 transitions. [2023-12-02 18:39:59,248 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), 4 states have call successors, (23), 3 states have call predecessors, (23), 3 states have return successors, (21), 4 states have call predecessors, (21), 4 states have call successors, (21) [2023-12-02 18:39:59,248 INFO L276 IsEmpty]: Start isEmpty. Operand 8329 states and 13113 transitions. [2023-12-02 18:39:59,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2023-12-02 18:39:59,259 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:39:59,259 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2023-12-02 18:39:59,267 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70b98492-576d-4d4e-8440-3c3809be8f9e/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2023-12-02 18:39:59,459 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70b98492-576d-4d4e-8440-3c3809be8f9e/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-12-02 18:39:59,460 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 18:39:59,460 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:39:59,460 INFO L85 PathProgramCache]: Analyzing trace with hash -218101296, now seen corresponding path program 1 times [2023-12-02 18:39:59,460 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 18:39:59,460 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [968232685] [2023-12-02 18:39:59,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:39:59,460 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 18:39:59,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:39:59,718 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 19 proven. 3 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-12-02 18:39:59,718 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 18:39:59,718 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [968232685] [2023-12-02 18:39:59,719 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [968232685] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 18:39:59,719 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1769767472] [2023-12-02 18:39:59,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:39:59,719 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:39:59,719 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70b98492-576d-4d4e-8440-3c3809be8f9e/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 18:39:59,720 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70b98492-576d-4d4e-8440-3c3809be8f9e/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 18:39:59,721 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70b98492-576d-4d4e-8440-3c3809be8f9e/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-12-02 18:40:00,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:40:00,026 INFO L262 TraceCheckSpWp]: Trace formula consists of 1890 conjuncts, 23 conjunts are in the unsatisfiable core [2023-12-02 18:40:00,030 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:40:00,106 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 51 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-12-02 18:40:00,106 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 18:40:00,106 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1769767472] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 18:40:00,106 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 18:40:00,106 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [8] total 15 [2023-12-02 18:40:00,106 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [781781231] [2023-12-02 18:40:00,106 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 18:40:00,107 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-12-02 18:40:00,107 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 18:40:00,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-12-02 18:40:00,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=181, Unknown=0, NotChecked=0, Total=210 [2023-12-02 18:40:00,108 INFO L87 Difference]: Start difference. First operand 8329 states and 13113 transitions. Second operand has 9 states, 7 states have (on average 11.142857142857142) internal successors, (78), 7 states have internal predecessors, (78), 3 states have call successors, (23), 3 states have call predecessors, (23), 5 states have return successors, (21), 5 states have call predecessors, (21), 3 states have call successors, (21) [2023-12-02 18:40:01,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:40:01,619 INFO L93 Difference]: Finished difference Result 20106 states and 31862 transitions. [2023-12-02 18:40:01,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-12-02 18:40:01,620 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 11.142857142857142) internal successors, (78), 7 states have internal predecessors, (78), 3 states have call successors, (23), 3 states have call predecessors, (23), 5 states have return successors, (21), 5 states have call predecessors, (21), 3 states have call successors, (21) Word has length 125 [2023-12-02 18:40:01,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:40:01,662 INFO L225 Difference]: With dead ends: 20106 [2023-12-02 18:40:01,662 INFO L226 Difference]: Without dead ends: 12640 [2023-12-02 18:40:01,694 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=297, Unknown=0, NotChecked=0, Total=342 [2023-12-02 18:40:01,695 INFO L413 NwaCegarLoop]: 610 mSDtfsCounter, 566 mSDsluCounter, 3445 mSDsCounter, 0 mSdLazyCounter, 1151 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 573 SdHoareTripleChecker+Valid, 4055 SdHoareTripleChecker+Invalid, 1164 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 1151 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-12-02 18:40:01,695 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [573 Valid, 4055 Invalid, 1164 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 1151 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-12-02 18:40:01,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12640 states. [2023-12-02 18:40:02,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12640 to 11452. [2023-12-02 18:40:02,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11452 states, 7722 states have (on average 1.4724164724164723) internal successors, (11370), 8302 states have internal predecessors, (11370), 2922 states have call successors, (2922), 759 states have call predecessors, (2922), 807 states have return successors, (3848), 2858 states have call predecessors, (3848), 2905 states have call successors, (3848) [2023-12-02 18:40:02,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11452 states to 11452 states and 18140 transitions. [2023-12-02 18:40:02,457 INFO L78 Accepts]: Start accepts. Automaton has 11452 states and 18140 transitions. Word has length 125 [2023-12-02 18:40:02,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:40:02,458 INFO L495 AbstractCegarLoop]: Abstraction has 11452 states and 18140 transitions. [2023-12-02 18:40:02,458 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 11.142857142857142) internal successors, (78), 7 states have internal predecessors, (78), 3 states have call successors, (23), 3 states have call predecessors, (23), 5 states have return successors, (21), 5 states have call predecessors, (21), 3 states have call successors, (21) [2023-12-02 18:40:02,458 INFO L276 IsEmpty]: Start isEmpty. Operand 11452 states and 18140 transitions. [2023-12-02 18:40:02,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2023-12-02 18:40:02,468 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:40:02,468 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2023-12-02 18:40:02,474 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70b98492-576d-4d4e-8440-3c3809be8f9e/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2023-12-02 18:40:02,669 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70b98492-576d-4d4e-8440-3c3809be8f9e/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-12-02 18:40:02,669 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 18:40:02,669 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:40:02,669 INFO L85 PathProgramCache]: Analyzing trace with hash 1343821732, now seen corresponding path program 1 times [2023-12-02 18:40:02,670 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 18:40:02,670 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [424414604] [2023-12-02 18:40:02,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:40:02,670 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 18:40:02,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:40:02,894 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 25 proven. 3 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2023-12-02 18:40:02,895 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 18:40:02,895 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [424414604] [2023-12-02 18:40:02,895 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [424414604] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 18:40:02,895 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [80424000] [2023-12-02 18:40:02,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:40:02,895 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:40:02,895 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70b98492-576d-4d4e-8440-3c3809be8f9e/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 18:40:02,896 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70b98492-576d-4d4e-8440-3c3809be8f9e/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 18:40:02,897 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70b98492-576d-4d4e-8440-3c3809be8f9e/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-12-02 18:40:03,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:40:03,247 INFO L262 TraceCheckSpWp]: Trace formula consists of 1903 conjuncts, 19 conjunts are in the unsatisfiable core [2023-12-02 18:40:03,251 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:40:03,353 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 55 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-12-02 18:40:03,353 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 18:40:03,562 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 29 proven. 2 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2023-12-02 18:40:03,562 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [80424000] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 18:40:03,562 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [882248411] [2023-12-02 18:40:03,581 INFO L159 IcfgInterpreter]: Started Sifa with 79 locations of interest [2023-12-02 18:40:03,581 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 18:40:03,584 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 18:40:03,587 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 18:40:03,588 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 18:40:28,138 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 659 for LOIs [2023-12-02 18:41:39,549 INFO L197 IcfgInterpreter]: Interpreting procedure __automaton_fail with input of size 56 for LOIs [2023-12-02 18:41:39,558 INFO L197 IcfgInterpreter]: Interpreting procedure stopRequestedInDirection with input of size 44 for LOIs [2023-12-02 18:41:39,995 INFO L197 IcfgInterpreter]: Interpreting procedure isTopFloor with input of size 38 for LOIs [2023-12-02 18:41:40,001 INFO L197 IcfgInterpreter]: Interpreting procedure isFloorCalling with input of size 446 for LOIs [2023-12-02 18:41:40,830 INFO L197 IcfgInterpreter]: Interpreting procedure buttonForFloorIsPressed with input of size 683 for LOIs [2023-12-02 18:41:46,000 INFO L197 IcfgInterpreter]: Interpreting procedure initTopDown with input of size 595 for LOIs [2023-12-02 18:41:54,153 INFO L197 IcfgInterpreter]: Interpreting procedure initFloors with input of size 569 for LOIs [2023-12-02 18:41:54,782 INFO L197 IcfgInterpreter]: Interpreting procedure continueInDirection with input of size 48 for LOIs [2023-12-02 18:41:54,807 INFO L197 IcfgInterpreter]: Interpreting procedure getCurrentHeading with input of size 7 for LOIs [2023-12-02 18:41:54,808 INFO L197 IcfgInterpreter]: Interpreting procedure bobCall with input of size 569 for LOIs [2023-12-02 18:42:07,302 INFO L197 IcfgInterpreter]: Interpreting procedure initPersonOnFloor with input of size 573 for LOIs [2023-12-02 18:42:08,315 INFO L197 IcfgInterpreter]: Interpreting procedure getOrigin with input of size 501 for LOIs [2023-12-02 18:42:08,754 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 18:43:23,008 WARN L293 SmtUtils]: Spent 18.65s on a formula simplification. DAG size of input: 659 DAG size of output: 631 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 18:43:43,356 WARN L293 SmtUtils]: Spent 19.91s on a formula simplification. DAG size of input: 672 DAG size of output: 644 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 18:44:03,914 WARN L293 SmtUtils]: Spent 19.90s on a formula simplification. DAG size of input: 683 DAG size of output: 646 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 18:44:24,344 WARN L293 SmtUtils]: Spent 19.83s on a formula simplification. DAG size of input: 686 DAG size of output: 646 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 18:44:45,459 WARN L293 SmtUtils]: Spent 19.86s on a formula simplification. DAG size of input: 687 DAG size of output: 642 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 18:45:21,187 WARN L293 SmtUtils]: Spent 35.09s on a formula simplification. DAG size of input: 683 DAG size of output: 645 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 18:45:57,568 WARN L293 SmtUtils]: Spent 35.65s on a formula simplification. DAG size of input: 720 DAG size of output: 687 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 18:46:18,064 WARN L293 SmtUtils]: Spent 19.74s on a formula simplification. DAG size of input: 689 DAG size of output: 644 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 18:46:38,174 WARN L293 SmtUtils]: Spent 19.33s on a formula simplification. DAG size of input: 689 DAG size of output: 644 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 18:46:49,983 WARN L293 SmtUtils]: Spent 11.20s on a formula simplification. DAG size of input: 692 DAG size of output: 606 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 18:47:02,615 WARN L293 SmtUtils]: Spent 7.10s on a formula simplification. DAG size of input: 446 DAG size of output: 436 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 18:47:10,262 WARN L293 SmtUtils]: Spent 7.23s on a formula simplification. DAG size of input: 478 DAG size of output: 473 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 18:47:25,374 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '224106#(and (<= 1 |#StackHeapBarrier|) (= ~head~0.offset 0) (or (and (not (= ~calls_0~0 0)) (= ~currentHeading~0 1) (exists ((|v_old(~currentHeading~0)_AFTER_CALL_55| Int)) (and (<= |v_old(~currentHeading~0)_AFTER_CALL_55| 2147483647) (<= 0 (+ |v_old(~currentHeading~0)_AFTER_CALL_55| 2147483648)) (not (= |v_old(~currentHeading~0)_AFTER_CALL_55| 1)))) (not (= ~doorState~0 1)) (= ~currentFloorID~0 1)) (and (not (= ~calls_0~0 0)) (exists ((|v_old(~currentHeading~0)_AFTER_CALL_56| Int)) (and (<= |v_old(~currentHeading~0)_AFTER_CALL_56| 2147483647) (<= 0 (+ |v_old(~currentHeading~0)_AFTER_CALL_56| 2147483648)) (not (= |v_old(~currentHeading~0)_AFTER_CALL_56| 1)))) (= ~currentHeading~0 1) (not (= ~doorState~0 1)) (= ~currentFloorID~0 1))) (<= ~floorButtons_0~0 2147483647) (<= 0 (+ ~calls_0~0 2147483648)) (= ~head~0.base 0) (= 0 (+ ~expectedDirection~0 1)) (<= 0 (+ ~floorButtons_0~0 2147483648)) (<= ~calls_0~0 2147483647) (= ~maximumWeight~0 100) (= ~cleanupTimeShifts~0 12))' at error location [2023-12-02 18:47:25,374 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 18:47:25,374 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 18:47:25,375 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 19 [2023-12-02 18:47:25,375 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [203897460] [2023-12-02 18:47:25,375 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 18:47:25,376 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-12-02 18:47:25,376 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 18:47:25,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-12-02 18:47:25,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=498, Invalid=5508, Unknown=0, NotChecked=0, Total=6006 [2023-12-02 18:47:25,379 INFO L87 Difference]: Start difference. First operand 11452 states and 18140 transitions. Second operand has 19 states, 16 states have (on average 7.875) internal successors, (126), 16 states have internal predecessors, (126), 8 states have call successors, (49), 4 states have call predecessors, (49), 10 states have return successors, (48), 11 states have call predecessors, (48), 8 states have call successors, (48) [2023-12-02 18:47:36,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:47:36,729 INFO L93 Difference]: Finished difference Result 49237 states and 83038 transitions. [2023-12-02 18:47:36,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2023-12-02 18:47:36,730 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 16 states have (on average 7.875) internal successors, (126), 16 states have internal predecessors, (126), 8 states have call successors, (49), 4 states have call predecessors, (49), 10 states have return successors, (48), 11 states have call predecessors, (48), 8 states have call successors, (48) Word has length 127 [2023-12-02 18:47:36,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:47:36,946 INFO L225 Difference]: With dead ends: 49237 [2023-12-02 18:47:36,946 INFO L226 Difference]: Without dead ends: 33857 [2023-12-02 18:47:37,114 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 481 GetRequests, 334 SyntacticMatches, 4 SemanticMatches, 143 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8258 ImplicationChecksByTransitivity, 318.4s TimeCoverageRelationStatistics Valid=1226, Invalid=19654, Unknown=0, NotChecked=0, Total=20880 [2023-12-02 18:47:37,115 INFO L413 NwaCegarLoop]: 689 mSDtfsCounter, 4929 mSDsluCounter, 6041 mSDsCounter, 0 mSdLazyCounter, 12559 mSolverCounterSat, 2007 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5055 SdHoareTripleChecker+Valid, 6730 SdHoareTripleChecker+Invalid, 14566 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 2007 IncrementalHoareTripleChecker+Valid, 12559 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.5s IncrementalHoareTripleChecker+Time [2023-12-02 18:47:37,115 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5055 Valid, 6730 Invalid, 14566 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [2007 Valid, 12559 Invalid, 0 Unknown, 0 Unchecked, 6.5s Time] [2023-12-02 18:47:37,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33857 states. [2023-12-02 18:47:38,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33857 to 28040. [2023-12-02 18:47:38,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28040 states, 19172 states have (on average 1.4661485499687044) internal successors, (28109), 20741 states have internal predecessors, (28109), 6897 states have call successors, (6897), 1756 states have call predecessors, (6897), 1970 states have return successors, (10607), 6401 states have call predecessors, (10607), 6869 states have call successors, (10607) [2023-12-02 18:47:39,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28040 states to 28040 states and 45613 transitions. [2023-12-02 18:47:39,181 INFO L78 Accepts]: Start accepts. Automaton has 28040 states and 45613 transitions. Word has length 127 [2023-12-02 18:47:39,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:47:39,181 INFO L495 AbstractCegarLoop]: Abstraction has 28040 states and 45613 transitions. [2023-12-02 18:47:39,182 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 16 states have (on average 7.875) internal successors, (126), 16 states have internal predecessors, (126), 8 states have call successors, (49), 4 states have call predecessors, (49), 10 states have return successors, (48), 11 states have call predecessors, (48), 8 states have call successors, (48) [2023-12-02 18:47:39,182 INFO L276 IsEmpty]: Start isEmpty. Operand 28040 states and 45613 transitions. [2023-12-02 18:47:39,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2023-12-02 18:47:39,190 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:47:39,191 INFO L195 NwaCegarLoop]: trace histogram [5, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 18:47:39,197 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70b98492-576d-4d4e-8440-3c3809be8f9e/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2023-12-02 18:47:39,391 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70b98492-576d-4d4e-8440-3c3809be8f9e/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-12-02 18:47:39,391 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 18:47:39,392 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:47:39,392 INFO L85 PathProgramCache]: Analyzing trace with hash -709060180, now seen corresponding path program 1 times [2023-12-02 18:47:39,392 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 18:47:39,392 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1346946525] [2023-12-02 18:47:39,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:47:39,392 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 18:47:39,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:47:39,728 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2023-12-02 18:47:39,728 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 18:47:39,729 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1346946525] [2023-12-02 18:47:39,729 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1346946525] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 18:47:39,729 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1613453428] [2023-12-02 18:47:39,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:47:39,729 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:47:39,729 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70b98492-576d-4d4e-8440-3c3809be8f9e/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 18:47:39,730 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70b98492-576d-4d4e-8440-3c3809be8f9e/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 18:47:39,730 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70b98492-576d-4d4e-8440-3c3809be8f9e/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-12-02 18:47:39,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:47:39,997 INFO L262 TraceCheckSpWp]: Trace formula consists of 1704 conjuncts, 3 conjunts are in the unsatisfiable core [2023-12-02 18:47:40,001 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:47:40,052 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-12-02 18:47:40,052 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 18:47:40,052 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1613453428] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 18:47:40,053 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 18:47:40,053 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [10] total 12 [2023-12-02 18:47:40,053 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [209750174] [2023-12-02 18:47:40,053 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 18:47:40,053 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 18:47:40,053 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 18:47:40,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 18:47:40,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2023-12-02 18:47:40,054 INFO L87 Difference]: Start difference. First operand 28040 states and 45613 transitions. Second operand has 4 states, 4 states have (on average 20.5) internal successors, (82), 4 states have internal predecessors, (82), 4 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (22), 4 states have call predecessors, (22), 4 states have call successors, (22) [2023-12-02 18:47:42,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:47:42,259 INFO L93 Difference]: Finished difference Result 56777 states and 94285 transitions. [2023-12-02 18:47:42,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-02 18:47:42,260 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.5) internal successors, (82), 4 states have internal predecessors, (82), 4 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (22), 4 states have call predecessors, (22), 4 states have call successors, (22) Word has length 136 [2023-12-02 18:47:42,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:47:42,401 INFO L225 Difference]: With dead ends: 56777 [2023-12-02 18:47:42,402 INFO L226 Difference]: Without dead ends: 26068 [2023-12-02 18:47:42,581 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2023-12-02 18:47:42,582 INFO L413 NwaCegarLoop]: 605 mSDtfsCounter, 183 mSDsluCounter, 952 mSDsCounter, 0 mSdLazyCounter, 166 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 193 SdHoareTripleChecker+Valid, 1557 SdHoareTripleChecker+Invalid, 182 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 166 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 18:47:42,582 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [193 Valid, 1557 Invalid, 182 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 166 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 18:47:42,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26068 states. [2023-12-02 18:47:44,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26068 to 26046. [2023-12-02 18:47:44,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26046 states, 17500 states have (on average 1.4515428571428572) internal successors, (25402), 19044 states have internal predecessors, (25402), 6646 states have call successors, (6646), 1711 states have call predecessors, (6646), 1899 states have return successors, (10089), 6149 states have call predecessors, (10089), 6618 states have call successors, (10089) [2023-12-02 18:47:44,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26046 states to 26046 states and 42137 transitions. [2023-12-02 18:47:44,718 INFO L78 Accepts]: Start accepts. Automaton has 26046 states and 42137 transitions. Word has length 136 [2023-12-02 18:47:44,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:47:44,718 INFO L495 AbstractCegarLoop]: Abstraction has 26046 states and 42137 transitions. [2023-12-02 18:47:44,718 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.5) internal successors, (82), 4 states have internal predecessors, (82), 4 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (22), 4 states have call predecessors, (22), 4 states have call successors, (22) [2023-12-02 18:47:44,718 INFO L276 IsEmpty]: Start isEmpty. Operand 26046 states and 42137 transitions. [2023-12-02 18:47:44,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2023-12-02 18:47:44,728 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:47:44,728 INFO L195 NwaCegarLoop]: trace histogram [5, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 18:47:44,734 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70b98492-576d-4d4e-8440-3c3809be8f9e/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2023-12-02 18:47:44,928 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70b98492-576d-4d4e-8440-3c3809be8f9e/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-12-02 18:47:44,929 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 18:47:44,929 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:47:44,929 INFO L85 PathProgramCache]: Analyzing trace with hash 1229899496, now seen corresponding path program 1 times [2023-12-02 18:47:44,929 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 18:47:44,929 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [394836145] [2023-12-02 18:47:44,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:47:44,929 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 18:47:44,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:47:45,482 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2023-12-02 18:47:45,483 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 18:47:45,483 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [394836145] [2023-12-02 18:47:45,483 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [394836145] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 18:47:45,483 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1764988895] [2023-12-02 18:47:45,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:47:45,483 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:47:45,483 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70b98492-576d-4d4e-8440-3c3809be8f9e/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 18:47:45,484 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70b98492-576d-4d4e-8440-3c3809be8f9e/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 18:47:45,487 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70b98492-576d-4d4e-8440-3c3809be8f9e/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-12-02 18:47:45,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:47:45,760 INFO L262 TraceCheckSpWp]: Trace formula consists of 1708 conjuncts, 18 conjunts are in the unsatisfiable core [2023-12-02 18:47:45,765 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:47:45,923 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 20 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-12-02 18:47:45,923 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 18:47:48,349 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2023-12-02 18:47:48,350 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1764988895] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 18:47:48,350 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2036306136] [2023-12-02 18:47:48,355 INFO L159 IcfgInterpreter]: Started Sifa with 119 locations of interest [2023-12-02 18:47:48,355 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 18:47:48,356 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 18:47:48,356 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 18:47:48,356 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 18:48:03,252 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 568 for LOIs [2023-12-02 18:48:18,705 INFO L197 IcfgInterpreter]: Interpreting procedure buttonForFloorIsPressed with input of size 442 for LOIs [2023-12-02 18:48:19,961 INFO L197 IcfgInterpreter]: Interpreting procedure initTopDown with input of size 595 for LOIs [2023-12-02 18:48:28,358 INFO L197 IcfgInterpreter]: Interpreting procedure initFloors with input of size 569 for LOIs [2023-12-02 18:48:28,992 INFO L197 IcfgInterpreter]: Interpreting procedure getCurrentHeading with input of size 433 for LOIs [2023-12-02 18:48:29,357 INFO L197 IcfgInterpreter]: Interpreting procedure bobCall with input of size 569 for LOIs [2023-12-02 18:48:41,468 INFO L197 IcfgInterpreter]: Interpreting procedure initPersonOnFloor with input of size 573 for LOIs [2023-12-02 18:48:44,861 INFO L197 IcfgInterpreter]: Interpreting procedure getOrigin with input of size 501 for LOIs [2023-12-02 18:48:45,305 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 18:48:54,176 WARN L293 SmtUtils]: Spent 5.00s on a formula simplification that was a NOOP. DAG size: 595 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 18:50:31,000 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [2036306136] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 18:50:31,001 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2023-12-02 18:50:31,001 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [10, 6, 7] total 42 [2023-12-02 18:50:31,001 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1653765278] [2023-12-02 18:50:31,001 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 18:50:31,002 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-12-02 18:50:31,002 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 18:50:31,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-12-02 18:50:31,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=197, Invalid=1525, Unknown=0, NotChecked=0, Total=1722 [2023-12-02 18:50:31,003 INFO L87 Difference]: Start difference. First operand 26046 states and 42137 transitions. Second operand has 27 states, 20 states have (on average 4.15) internal successors, (83), 15 states have internal predecessors, (83), 10 states have call successors, (24), 8 states have call predecessors, (24), 8 states have return successors, (22), 9 states have call predecessors, (22), 9 states have call successors, (22) [2023-12-02 18:51:22,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:51:22,566 INFO L93 Difference]: Finished difference Result 52202 states and 84444 transitions. [2023-12-02 18:51:22,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-12-02 18:51:22,567 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 20 states have (on average 4.15) internal successors, (83), 15 states have internal predecessors, (83), 10 states have call successors, (24), 8 states have call predecessors, (24), 8 states have return successors, (22), 9 states have call predecessors, (22), 9 states have call successors, (22) Word has length 140 [2023-12-02 18:51:22,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:51:22,727 INFO L225 Difference]: With dead ends: 52202 [2023-12-02 18:51:22,727 INFO L226 Difference]: Without dead ends: 26168 [2023-12-02 18:51:22,878 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 434 GetRequests, 389 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 367 ImplicationChecksByTransitivity, 128.0s TimeCoverageRelationStatistics Valid=238, Invalid=1924, Unknown=0, NotChecked=0, Total=2162 [2023-12-02 18:51:22,879 INFO L413 NwaCegarLoop]: 567 mSDtfsCounter, 239 mSDsluCounter, 3298 mSDsCounter, 0 mSdLazyCounter, 5505 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 26.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 249 SdHoareTripleChecker+Valid, 3865 SdHoareTripleChecker+Invalid, 5564 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 5505 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 27.3s IncrementalHoareTripleChecker+Time [2023-12-02 18:51:22,879 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [249 Valid, 3865 Invalid, 5564 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [59 Valid, 5505 Invalid, 0 Unknown, 0 Unchecked, 27.3s Time] [2023-12-02 18:51:22,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26168 states. [2023-12-02 18:51:24,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26168 to 26089. [2023-12-02 18:51:24,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26089 states, 17533 states have (on average 1.4509211201733874) internal successors, (25439), 19076 states have internal predecessors, (25439), 6652 states have call successors, (6652), 1716 states have call predecessors, (6652), 1903 states have return successors, (10091), 6155 states have call predecessors, (10091), 6624 states have call successors, (10091) [2023-12-02 18:51:24,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26089 states to 26089 states and 42182 transitions. [2023-12-02 18:51:24,876 INFO L78 Accepts]: Start accepts. Automaton has 26089 states and 42182 transitions. Word has length 140 [2023-12-02 18:51:24,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:51:24,877 INFO L495 AbstractCegarLoop]: Abstraction has 26089 states and 42182 transitions. [2023-12-02 18:51:24,877 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 20 states have (on average 4.15) internal successors, (83), 15 states have internal predecessors, (83), 10 states have call successors, (24), 8 states have call predecessors, (24), 8 states have return successors, (22), 9 states have call predecessors, (22), 9 states have call successors, (22) [2023-12-02 18:51:24,877 INFO L276 IsEmpty]: Start isEmpty. Operand 26089 states and 42182 transitions. [2023-12-02 18:51:24,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2023-12-02 18:51:24,885 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:51:24,885 INFO L195 NwaCegarLoop]: trace histogram [7, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2023-12-02 18:51:24,891 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70b98492-576d-4d4e-8440-3c3809be8f9e/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2023-12-02 18:51:25,085 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70b98492-576d-4d4e-8440-3c3809be8f9e/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:51:25,085 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 18:51:25,086 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:51:25,086 INFO L85 PathProgramCache]: Analyzing trace with hash -229428655, now seen corresponding path program 1 times [2023-12-02 18:51:25,086 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 18:51:25,086 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1314447025] [2023-12-02 18:51:25,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:51:25,086 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 18:51:25,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:51:25,812 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 20 proven. 3 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2023-12-02 18:51:25,812 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 18:51:25,812 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1314447025] [2023-12-02 18:51:25,812 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1314447025] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 18:51:25,812 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1850617881] [2023-12-02 18:51:25,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:51:25,812 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:51:25,813 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70b98492-576d-4d4e-8440-3c3809be8f9e/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 18:51:25,813 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70b98492-576d-4d4e-8440-3c3809be8f9e/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 18:51:25,819 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70b98492-576d-4d4e-8440-3c3809be8f9e/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-12-02 18:51:26,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:51:26,120 INFO L262 TraceCheckSpWp]: Trace formula consists of 1923 conjuncts, 15 conjunts are in the unsatisfiable core [2023-12-02 18:51:26,123 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:51:26,214 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 55 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2023-12-02 18:51:26,214 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 18:51:26,214 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1850617881] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 18:51:26,214 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 18:51:26,214 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [18] total 24 [2023-12-02 18:51:26,214 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1130164985] [2023-12-02 18:51:26,214 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 18:51:26,215 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-12-02 18:51:26,215 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 18:51:26,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-12-02 18:51:26,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=489, Unknown=0, NotChecked=0, Total=552 [2023-12-02 18:51:26,216 INFO L87 Difference]: Start difference. First operand 26089 states and 42182 transitions. Second operand has 8 states, 7 states have (on average 12.0) internal successors, (84), 7 states have internal predecessors, (84), 3 states have call successors, (24), 3 states have call predecessors, (24), 5 states have return successors, (23), 4 states have call predecessors, (23), 3 states have call successors, (23) [2023-12-02 18:51:29,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:51:29,053 INFO L93 Difference]: Finished difference Result 50733 states and 82569 transitions. [2023-12-02 18:51:29,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-12-02 18:51:29,053 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 12.0) internal successors, (84), 7 states have internal predecessors, (84), 3 states have call successors, (24), 3 states have call predecessors, (24), 5 states have return successors, (23), 4 states have call predecessors, (23), 3 states have call successors, (23) Word has length 139 [2023-12-02 18:51:29,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:51:29,193 INFO L225 Difference]: With dead ends: 50733 [2023-12-02 18:51:29,194 INFO L226 Difference]: Without dead ends: 26110 [2023-12-02 18:51:29,315 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=80, Invalid=676, Unknown=0, NotChecked=0, Total=756 [2023-12-02 18:51:29,315 INFO L413 NwaCegarLoop]: 978 mSDtfsCounter, 567 mSDsluCounter, 4276 mSDsCounter, 0 mSdLazyCounter, 1466 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 582 SdHoareTripleChecker+Valid, 5254 SdHoareTripleChecker+Invalid, 1499 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 1466 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-12-02 18:51:29,316 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [582 Valid, 5254 Invalid, 1499 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 1466 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-12-02 18:51:29,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26110 states. [2023-12-02 18:51:31,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26110 to 24986. [2023-12-02 18:51:31,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24986 states, 16765 states have (on average 1.4481956456904266) internal successors, (24279), 18233 states have internal predecessors, (24279), 6340 states have call successors, (6340), 1687 states have call predecessors, (6340), 1880 states have return successors, (9676), 5892 states have call predecessors, (9676), 6304 states have call successors, (9676) [2023-12-02 18:51:31,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24986 states to 24986 states and 40295 transitions. [2023-12-02 18:51:31,257 INFO L78 Accepts]: Start accepts. Automaton has 24986 states and 40295 transitions. Word has length 139 [2023-12-02 18:51:31,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:51:31,257 INFO L495 AbstractCegarLoop]: Abstraction has 24986 states and 40295 transitions. [2023-12-02 18:51:31,258 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 12.0) internal successors, (84), 7 states have internal predecessors, (84), 3 states have call successors, (24), 3 states have call predecessors, (24), 5 states have return successors, (23), 4 states have call predecessors, (23), 3 states have call successors, (23) [2023-12-02 18:51:31,258 INFO L276 IsEmpty]: Start isEmpty. Operand 24986 states and 40295 transitions. [2023-12-02 18:51:31,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2023-12-02 18:51:31,267 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:51:31,267 INFO L195 NwaCegarLoop]: trace histogram [7, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2023-12-02 18:51:31,273 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70b98492-576d-4d4e-8440-3c3809be8f9e/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2023-12-02 18:51:31,467 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70b98492-576d-4d4e-8440-3c3809be8f9e/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:51:31,467 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 18:51:31,468 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:51:31,468 INFO L85 PathProgramCache]: Analyzing trace with hash -1802438610, now seen corresponding path program 1 times [2023-12-02 18:51:31,468 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 18:51:31,468 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [525438997] [2023-12-02 18:51:31,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:51:31,468 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 18:51:31,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:51:32,075 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 20 proven. 3 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2023-12-02 18:51:32,076 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 18:51:32,076 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [525438997] [2023-12-02 18:51:32,076 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [525438997] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 18:51:32,076 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [553387184] [2023-12-02 18:51:32,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:51:32,076 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:51:32,076 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70b98492-576d-4d4e-8440-3c3809be8f9e/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 18:51:32,077 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70b98492-576d-4d4e-8440-3c3809be8f9e/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 18:51:32,078 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70b98492-576d-4d4e-8440-3c3809be8f9e/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-12-02 18:51:32,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:51:32,371 INFO L262 TraceCheckSpWp]: Trace formula consists of 1938 conjuncts, 17 conjunts are in the unsatisfiable core [2023-12-02 18:51:32,374 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:51:32,472 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 53 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-12-02 18:51:32,472 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 18:51:32,473 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [553387184] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 18:51:32,473 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 18:51:32,473 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [18] total 24 [2023-12-02 18:51:32,473 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1421433391] [2023-12-02 18:51:32,473 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 18:51:32,473 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-12-02 18:51:32,473 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 18:51:32,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-12-02 18:51:32,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=491, Unknown=0, NotChecked=0, Total=552 [2023-12-02 18:51:32,475 INFO L87 Difference]: Start difference. First operand 24986 states and 40295 transitions. Second operand has 8 states, 7 states have (on average 12.142857142857142) internal successors, (85), 7 states have internal predecessors, (85), 3 states have call successors, (25), 3 states have call predecessors, (25), 5 states have return successors, (24), 4 states have call predecessors, (24), 3 states have call successors, (24) [2023-12-02 18:51:35,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:51:35,174 INFO L93 Difference]: Finished difference Result 48572 states and 78104 transitions. [2023-12-02 18:51:35,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-12-02 18:51:35,175 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 12.142857142857142) internal successors, (85), 7 states have internal predecessors, (85), 3 states have call successors, (25), 3 states have call predecessors, (25), 5 states have return successors, (24), 4 states have call predecessors, (24), 3 states have call successors, (24) Word has length 142 [2023-12-02 18:51:35,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:51:35,324 INFO L225 Difference]: With dead ends: 48572 [2023-12-02 18:51:35,325 INFO L226 Difference]: Without dead ends: 25090 [2023-12-02 18:51:35,442 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 141 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=77, Invalid=679, Unknown=0, NotChecked=0, Total=756 [2023-12-02 18:51:35,443 INFO L413 NwaCegarLoop]: 984 mSDtfsCounter, 529 mSDsluCounter, 4604 mSDsCounter, 0 mSdLazyCounter, 1296 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 536 SdHoareTripleChecker+Valid, 5588 SdHoareTripleChecker+Invalid, 1313 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 1296 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-12-02 18:51:35,443 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [536 Valid, 5588 Invalid, 1313 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 1296 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-12-02 18:51:35,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25090 states. [2023-12-02 18:51:37,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25090 to 25050. [2023-12-02 18:51:37,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25050 states, 16825 states have (on average 1.4465973254086182) internal successors, (24339), 18267 states have internal predecessors, (24339), 6344 states have call successors, (6344), 1717 states have call predecessors, (6344), 1880 states have return successors, (9624), 5892 states have call predecessors, (9624), 6308 states have call successors, (9624) [2023-12-02 18:51:37,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25050 states to 25050 states and 40307 transitions. [2023-12-02 18:51:37,473 INFO L78 Accepts]: Start accepts. Automaton has 25050 states and 40307 transitions. Word has length 142 [2023-12-02 18:51:37,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:51:37,473 INFO L495 AbstractCegarLoop]: Abstraction has 25050 states and 40307 transitions. [2023-12-02 18:51:37,473 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 12.142857142857142) internal successors, (85), 7 states have internal predecessors, (85), 3 states have call successors, (25), 3 states have call predecessors, (25), 5 states have return successors, (24), 4 states have call predecessors, (24), 3 states have call successors, (24) [2023-12-02 18:51:37,473 INFO L276 IsEmpty]: Start isEmpty. Operand 25050 states and 40307 transitions. [2023-12-02 18:51:37,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2023-12-02 18:51:37,482 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:51:37,483 INFO L195 NwaCegarLoop]: trace histogram [7, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2023-12-02 18:51:37,489 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70b98492-576d-4d4e-8440-3c3809be8f9e/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2023-12-02 18:51:37,683 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70b98492-576d-4d4e-8440-3c3809be8f9e/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2023-12-02 18:51:37,683 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 18:51:37,683 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:51:37,683 INFO L85 PathProgramCache]: Analyzing trace with hash -1246180374, now seen corresponding path program 1 times [2023-12-02 18:51:37,684 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 18:51:37,684 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1101513027] [2023-12-02 18:51:37,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:51:37,684 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 18:51:37,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:51:38,311 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 24 proven. 3 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2023-12-02 18:51:38,312 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 18:51:38,312 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1101513027] [2023-12-02 18:51:38,312 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1101513027] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 18:51:38,312 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1975470708] [2023-12-02 18:51:38,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:51:38,312 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:51:38,312 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70b98492-576d-4d4e-8440-3c3809be8f9e/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 18:51:38,313 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70b98492-576d-4d4e-8440-3c3809be8f9e/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 18:51:38,319 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70b98492-576d-4d4e-8440-3c3809be8f9e/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-12-02 18:51:38,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:51:38,600 INFO L262 TraceCheckSpWp]: Trace formula consists of 1937 conjuncts, 2 conjunts are in the unsatisfiable core [2023-12-02 18:51:38,603 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:51:38,618 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 54 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2023-12-02 18:51:38,618 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 18:51:38,618 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1975470708] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 18:51:38,618 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 18:51:38,619 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [18] total 19 [2023-12-02 18:51:38,619 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [515073379] [2023-12-02 18:51:38,619 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 18:51:38,619 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 18:51:38,619 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 18:51:38,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 18:51:38,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2023-12-02 18:51:38,620 INFO L87 Difference]: Start difference. First operand 25050 states and 40307 transitions. Second operand has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 2 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (23), 2 states have call predecessors, (23), 2 states have call successors, (23) [2023-12-02 18:51:40,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:51:40,476 INFO L93 Difference]: Finished difference Result 45258 states and 74214 transitions. [2023-12-02 18:51:40,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 18:51:40,477 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 2 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (23), 2 states have call predecessors, (23), 2 states have call successors, (23) Word has length 142 [2023-12-02 18:51:40,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:51:40,566 INFO L225 Difference]: With dead ends: 45258 [2023-12-02 18:51:40,566 INFO L226 Difference]: Without dead ends: 21664 [2023-12-02 18:51:40,715 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2023-12-02 18:51:40,715 INFO L413 NwaCegarLoop]: 553 mSDtfsCounter, 20 mSDsluCounter, 517 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 1070 SdHoareTripleChecker+Invalid, 109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 18:51:40,716 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 1070 Invalid, 109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 100 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 18:51:40,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21664 states. [2023-12-02 18:51:42,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21664 to 21622. [2023-12-02 18:51:42,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21622 states, 14730 states have (on average 1.4365241004752207) internal successors, (21160), 15858 states have internal predecessors, (21160), 5237 states have call successors, (5237), 1522 states have call predecessors, (5237), 1654 states have return successors, (7981), 4887 states have call predecessors, (7981), 5201 states have call successors, (7981) [2023-12-02 18:51:42,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21622 states to 21622 states and 34378 transitions. [2023-12-02 18:51:42,768 INFO L78 Accepts]: Start accepts. Automaton has 21622 states and 34378 transitions. Word has length 142 [2023-12-02 18:51:42,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:51:42,768 INFO L495 AbstractCegarLoop]: Abstraction has 21622 states and 34378 transitions. [2023-12-02 18:51:42,769 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 2 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (23), 2 states have call predecessors, (23), 2 states have call successors, (23) [2023-12-02 18:51:42,769 INFO L276 IsEmpty]: Start isEmpty. Operand 21622 states and 34378 transitions. [2023-12-02 18:51:42,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2023-12-02 18:51:42,775 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:51:42,775 INFO L195 NwaCegarLoop]: trace histogram [7, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2023-12-02 18:51:42,782 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70b98492-576d-4d4e-8440-3c3809be8f9e/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2023-12-02 18:51:42,975 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70b98492-576d-4d4e-8440-3c3809be8f9e/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2023-12-02 18:51:42,976 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 18:51:42,976 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:51:42,976 INFO L85 PathProgramCache]: Analyzing trace with hash -116927679, now seen corresponding path program 1 times [2023-12-02 18:51:42,976 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 18:51:42,976 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [639524024] [2023-12-02 18:51:42,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:51:42,976 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 18:51:43,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:51:43,596 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 20 proven. 3 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2023-12-02 18:51:43,596 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 18:51:43,596 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [639524024] [2023-12-02 18:51:43,596 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [639524024] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 18:51:43,596 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1931153439] [2023-12-02 18:51:43,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:51:43,596 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:51:43,596 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70b98492-576d-4d4e-8440-3c3809be8f9e/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 18:51:43,597 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70b98492-576d-4d4e-8440-3c3809be8f9e/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 18:51:43,598 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70b98492-576d-4d4e-8440-3c3809be8f9e/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-12-02 18:51:43,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:51:43,918 INFO L262 TraceCheckSpWp]: Trace formula consists of 1955 conjuncts, 21 conjunts are in the unsatisfiable core [2023-12-02 18:51:43,922 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:51:44,116 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 53 proven. 4 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2023-12-02 18:51:44,116 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 18:51:44,501 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2023-12-02 18:51:44,501 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1931153439] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 18:51:44,501 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1375551914] [2023-12-02 18:51:44,505 INFO L159 IcfgInterpreter]: Started Sifa with 98 locations of interest [2023-12-02 18:51:44,505 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 18:51:44,505 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 18:51:44,506 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 18:51:44,506 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 18:52:05,816 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 608 for LOIs