./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/elevator_spec3_product24.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version cf1a7837 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_57ed01fe-1594-4a08-a8d7-f63e1b819fca/bin/utaipan-verify-NcY6lQBIFX/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57ed01fe-1594-4a08-a8d7-f63e1b819fca/bin/utaipan-verify-NcY6lQBIFX/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57ed01fe-1594-4a08-a8d7-f63e1b819fca/bin/utaipan-verify-NcY6lQBIFX/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57ed01fe-1594-4a08-a8d7-f63e1b819fca/bin/utaipan-verify-NcY6lQBIFX/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec3_product24.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57ed01fe-1594-4a08-a8d7-f63e1b819fca/bin/utaipan-verify-NcY6lQBIFX/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57ed01fe-1594-4a08-a8d7-f63e1b819fca/bin/utaipan-verify-NcY6lQBIFX --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 8333bf118d61dc3e3ddedc658c9d6fef28fa288c9b6abdc361c7a0f5f6e109b7 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-cf1a783 [2023-11-12 00:58:52,325 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-12 00:58:52,448 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57ed01fe-1594-4a08-a8d7-f63e1b819fca/bin/utaipan-verify-NcY6lQBIFX/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-11-12 00:58:52,456 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-12 00:58:52,457 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-12 00:58:52,495 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-12 00:58:52,495 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-12 00:58:52,496 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-12 00:58:52,497 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-12 00:58:52,502 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-12 00:58:52,503 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-12 00:58:52,503 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-12 00:58:52,504 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-12 00:58:52,506 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-12 00:58:52,506 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-12 00:58:52,507 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-12 00:58:52,507 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-12 00:58:52,508 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-12 00:58:52,508 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-12 00:58:52,509 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-12 00:58:52,509 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-12 00:58:52,510 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-12 00:58:52,511 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-12 00:58:52,511 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-12 00:58:52,512 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-12 00:58:52,512 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-12 00:58:52,513 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-12 00:58:52,513 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-12 00:58:52,514 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-12 00:58:52,514 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-12 00:58:52,516 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-12 00:58:52,516 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-12 00:58:52,516 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-12 00:58:52,517 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-12 00:58:52,517 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-12 00:58:52,518 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-12 00:58:52,518 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 00:58:52,519 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-12 00:58:52,519 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-12 00:58:52,519 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-12 00:58:52,520 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-12 00:58:52,520 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-12 00:58:52,520 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-12 00:58:52,521 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-12 00:58:52,521 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-12 00:58:52,522 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_57ed01fe-1594-4a08-a8d7-f63e1b819fca/bin/utaipan-verify-NcY6lQBIFX/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57ed01fe-1594-4a08-a8d7-f63e1b819fca/bin/utaipan-verify-NcY6lQBIFX Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8333bf118d61dc3e3ddedc658c9d6fef28fa288c9b6abdc361c7a0f5f6e109b7 [2023-11-12 00:58:52,825 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-12 00:58:52,854 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-12 00:58:52,857 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-12 00:58:52,858 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-12 00:58:52,859 INFO L274 PluginConnector]: CDTParser initialized [2023-11-12 00:58:52,862 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57ed01fe-1594-4a08-a8d7-f63e1b819fca/bin/utaipan-verify-NcY6lQBIFX/../../sv-benchmarks/c/product-lines/elevator_spec3_product24.cil.c [2023-11-12 00:58:56,034 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-12 00:58:56,552 INFO L384 CDTParser]: Found 1 translation units. [2023-11-12 00:58:56,555 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57ed01fe-1594-4a08-a8d7-f63e1b819fca/sv-benchmarks/c/product-lines/elevator_spec3_product24.cil.c [2023-11-12 00:58:56,584 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57ed01fe-1594-4a08-a8d7-f63e1b819fca/bin/utaipan-verify-NcY6lQBIFX/data/4092f1642/3ff5296b8d3342fc96b7f11395963650/FLAG3c0a08c5d [2023-11-12 00:58:56,609 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57ed01fe-1594-4a08-a8d7-f63e1b819fca/bin/utaipan-verify-NcY6lQBIFX/data/4092f1642/3ff5296b8d3342fc96b7f11395963650 [2023-11-12 00:58:56,617 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-12 00:58:56,620 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-12 00:58:56,626 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-12 00:58:56,626 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-12 00:58:56,633 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-12 00:58:56,634 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 12:58:56" (1/1) ... [2023-11-12 00:58:56,636 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1dd0e38b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:58:56, skipping insertion in model container [2023-11-12 00:58:56,636 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 12:58:56" (1/1) ... [2023-11-12 00:58:56,756 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-12 00:58:57,459 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_57ed01fe-1594-4a08-a8d7-f63e1b819fca/sv-benchmarks/c/product-lines/elevator_spec3_product24.cil.c[75121,75134] [2023-11-12 00:58:57,465 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 00:58:57,486 INFO L202 MainTranslator]: Completed pre-run [2023-11-12 00:58:57,500 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"scenario.i","") [48] [2023-11-12 00:58:57,502 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Test.i","") [67] [2023-11-12 00:58:57,503 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Person.i","") [425] [2023-11-12 00:58:57,503 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"UnitTests.i","") [545] [2023-11-12 00:58:57,505 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Elevator.i","") [641] [2023-11-12 00:58:57,505 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Floor.i","") [2290] [2023-11-12 00:58:57,505 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Specification3_spec.i","") [2951] [2023-11-12 00:58:57,506 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"libacc.i","") [3138] [2023-11-12 00:58:57,506 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"featureselect.i","") [3504] [2023-11-12 00:58:57,506 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"wsllib_check.i","") [3539] [2023-11-12 00:58:57,711 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_57ed01fe-1594-4a08-a8d7-f63e1b819fca/sv-benchmarks/c/product-lines/elevator_spec3_product24.cil.c[75121,75134] [2023-11-12 00:58:57,715 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 00:58:57,803 INFO L206 MainTranslator]: Completed translation [2023-11-12 00:58:57,809 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:58:57 WrapperNode [2023-11-12 00:58:57,809 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-12 00:58:57,810 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-12 00:58:57,811 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-12 00:58:57,811 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-12 00:58:57,820 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:58:57" (1/1) ... [2023-11-12 00:58:57,887 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:58:57" (1/1) ... [2023-11-12 00:58:57,958 INFO L138 Inliner]: procedures = 96, calls = 359, calls flagged for inlining = 27, calls inlined = 23, statements flattened = 965 [2023-11-12 00:58:57,958 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-12 00:58:57,959 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-12 00:58:57,959 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-12 00:58:57,960 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-12 00:58:57,972 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:58:57" (1/1) ... [2023-11-12 00:58:57,972 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:58:57" (1/1) ... [2023-11-12 00:58:57,981 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:58:57" (1/1) ... [2023-11-12 00:58:57,981 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:58:57" (1/1) ... [2023-11-12 00:58:58,007 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:58:57" (1/1) ... [2023-11-12 00:58:58,023 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:58:57" (1/1) ... [2023-11-12 00:58:58,029 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:58:57" (1/1) ... [2023-11-12 00:58:58,036 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:58:57" (1/1) ... [2023-11-12 00:58:58,047 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-12 00:58:58,048 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-12 00:58:58,049 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-12 00:58:58,049 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-12 00:58:58,050 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:58:57" (1/1) ... [2023-11-12 00:58:58,060 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 00:58:58,079 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57ed01fe-1594-4a08-a8d7-f63e1b819fca/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:58:58,098 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57ed01fe-1594-4a08-a8d7-f63e1b819fca/bin/utaipan-verify-NcY6lQBIFX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-12 00:58:58,118 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57ed01fe-1594-4a08-a8d7-f63e1b819fca/bin/utaipan-verify-NcY6lQBIFX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-12 00:58:58,147 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-12 00:58:58,147 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor__wrappee__twothirdsfull [2023-11-12 00:58:58,147 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor__wrappee__twothirdsfull [2023-11-12 00:58:58,148 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentHeading [2023-11-12 00:58:58,148 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentHeading [2023-11-12 00:58:58,148 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2023-11-12 00:58:58,148 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2023-11-12 00:58:58,149 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2023-11-12 00:58:58,150 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2023-11-12 00:58:58,151 INFO L130 BoogieDeclarations]: Found specification of procedure isExecutiveFloorCalling [2023-11-12 00:58:58,151 INFO L138 BoogieDeclarations]: Found implementation of procedure isExecutiveFloorCalling [2023-11-12 00:58:58,151 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2023-11-12 00:58:58,152 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2023-11-12 00:58:58,154 INFO L130 BoogieDeclarations]: Found specification of procedure bobCall [2023-11-12 00:58:58,155 INFO L138 BoogieDeclarations]: Found implementation of procedure bobCall [2023-11-12 00:58:58,155 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2023-11-12 00:58:58,155 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2023-11-12 00:58:58,156 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2023-11-12 00:58:58,159 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2023-11-12 00:58:58,160 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2023-11-12 00:58:58,160 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2023-11-12 00:58:58,160 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2023-11-12 00:58:58,160 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2023-11-12 00:58:58,161 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2023-11-12 00:58:58,161 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2023-11-12 00:58:58,161 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2023-11-12 00:58:58,161 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2023-11-12 00:58:58,162 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2023-11-12 00:58:58,162 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2023-11-12 00:58:58,162 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2023-11-12 00:58:58,162 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2023-11-12 00:58:58,162 INFO L130 BoogieDeclarations]: Found specification of procedure initTopDown [2023-11-12 00:58:58,162 INFO L138 BoogieDeclarations]: Found implementation of procedure initTopDown [2023-11-12 00:58:58,163 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2023-11-12 00:58:58,163 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2023-11-12 00:58:58,163 INFO L130 BoogieDeclarations]: Found specification of procedure initFloors [2023-11-12 00:58:58,163 INFO L138 BoogieDeclarations]: Found implementation of procedure initFloors [2023-11-12 00:58:58,163 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2023-11-12 00:58:58,163 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2023-11-12 00:58:58,163 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2023-11-12 00:58:58,164 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2023-11-12 00:58:58,164 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2023-11-12 00:58:58,164 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2023-11-12 00:58:58,164 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2023-11-12 00:58:58,164 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2023-11-12 00:58:58,164 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-12 00:58:58,164 INFO L130 BoogieDeclarations]: Found specification of procedure buttonForFloorIsPressed [2023-11-12 00:58:58,164 INFO L138 BoogieDeclarations]: Found implementation of procedure buttonForFloorIsPressed [2023-11-12 00:58:58,165 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2023-11-12 00:58:58,165 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2023-11-12 00:58:58,165 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2023-11-12 00:58:58,165 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2023-11-12 00:58:58,165 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2023-11-12 00:58:58,165 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2023-11-12 00:58:58,165 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection__wrappee__weight [2023-11-12 00:58:58,165 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection__wrappee__weight [2023-11-12 00:58:58,165 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-12 00:58:58,166 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-12 00:58:58,166 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2023-11-12 00:58:58,166 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2023-11-12 00:58:58,166 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift__wrappee__executivefloor [2023-11-12 00:58:58,166 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift__wrappee__executivefloor [2023-11-12 00:58:58,342 INFO L236 CfgBuilder]: Building ICFG [2023-11-12 00:58:58,345 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-12 00:58:59,856 INFO L277 CfgBuilder]: Performing block encoding [2023-11-12 00:59:00,850 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-12 00:59:00,850 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-12 00:59:00,854 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 12:59:00 BoogieIcfgContainer [2023-11-12 00:59:00,854 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-12 00:59:00,857 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-12 00:59:00,857 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-12 00:59:00,861 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-12 00:59:00,861 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 12:58:56" (1/3) ... [2023-11-12 00:59:00,862 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@53b26df9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 12:59:00, skipping insertion in model container [2023-11-12 00:59:00,862 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:58:57" (2/3) ... [2023-11-12 00:59:00,863 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@53b26df9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 12:59:00, skipping insertion in model container [2023-11-12 00:59:00,863 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 12:59:00" (3/3) ... [2023-11-12 00:59:00,864 INFO L112 eAbstractionObserver]: Analyzing ICFG elevator_spec3_product24.cil.c [2023-11-12 00:59:00,884 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-12 00:59:00,884 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-12 00:59:00,952 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-12 00:59:00,959 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;@4db1b7fe, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-12 00:59:00,959 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-12 00:59:00,966 INFO L276 IsEmpty]: Start isEmpty. Operand has 434 states, 288 states have (on average 1.5555555555555556) internal successors, (448), 308 states have internal predecessors, (448), 115 states have call successors, (115), 29 states have call predecessors, (115), 29 states have return successors, (115), 111 states have call predecessors, (115), 115 states have call successors, (115) [2023-11-12 00:59:00,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2023-11-12 00:59:00,979 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:59:00,979 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] [2023-11-12 00:59:00,980 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:59:00,985 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:59:00,986 INFO L85 PathProgramCache]: Analyzing trace with hash -1537350806, now seen corresponding path program 1 times [2023-11-12 00:59:00,996 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:59:00,997 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1851847230] [2023-11-12 00:59:00,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:59:00,998 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:59:01,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:59:02,114 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-12 00:59:02,115 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:59:02,115 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1851847230] [2023-11-12 00:59:02,116 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1851847230] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:59:02,116 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:59:02,117 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-12 00:59:02,118 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2091731120] [2023-11-12 00:59:02,119 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:59:02,124 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-12 00:59:02,125 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:59:02,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-12 00:59:02,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-12 00:59:02,173 INFO L87 Difference]: Start difference. First operand has 434 states, 288 states have (on average 1.5555555555555556) internal successors, (448), 308 states have internal predecessors, (448), 115 states have call successors, (115), 29 states have call predecessors, (115), 29 states have return successors, (115), 111 states have call predecessors, (115), 115 states have call successors, (115) Second operand has 6 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 4 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2023-11-12 00:59:03,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:59:03,677 INFO L93 Difference]: Finished difference Result 1227 states and 1946 transitions. [2023-11-12 00:59:03,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-12 00:59:03,680 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 4 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) Word has length 49 [2023-11-12 00:59:03,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:59:03,715 INFO L225 Difference]: With dead ends: 1227 [2023-11-12 00:59:03,715 INFO L226 Difference]: Without dead ends: 795 [2023-11-12 00:59:03,731 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2023-11-12 00:59:03,736 INFO L413 NwaCegarLoop]: 638 mSDtfsCounter, 559 mSDsluCounter, 2257 mSDsCounter, 0 mSdLazyCounter, 725 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 563 SdHoareTripleChecker+Valid, 2895 SdHoareTripleChecker+Invalid, 763 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 725 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2023-11-12 00:59:03,738 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [563 Valid, 2895 Invalid, 763 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [38 Valid, 725 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2023-11-12 00:59:03,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 795 states. [2023-11-12 00:59:03,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 795 to 789. [2023-11-12 00:59:03,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 789 states, 525 states have (on average 1.4857142857142858) internal successors, (780), 559 states have internal predecessors, (780), 212 states have call successors, (212), 55 states have call predecessors, (212), 51 states have return successors, (215), 201 states have call predecessors, (215), 208 states have call successors, (215) [2023-11-12 00:59:03,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 789 states to 789 states and 1207 transitions. [2023-11-12 00:59:03,937 INFO L78 Accepts]: Start accepts. Automaton has 789 states and 1207 transitions. Word has length 49 [2023-11-12 00:59:03,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:59:03,938 INFO L495 AbstractCegarLoop]: Abstraction has 789 states and 1207 transitions. [2023-11-12 00:59:03,938 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 4 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2023-11-12 00:59:03,939 INFO L276 IsEmpty]: Start isEmpty. Operand 789 states and 1207 transitions. [2023-11-12 00:59:03,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2023-11-12 00:59:03,943 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:59:03,943 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] [2023-11-12 00:59:03,944 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-12 00:59:03,944 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:59:03,945 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:59:03,945 INFO L85 PathProgramCache]: Analyzing trace with hash -1594531912, now seen corresponding path program 1 times [2023-11-12 00:59:03,946 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:59:03,946 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1190214117] [2023-11-12 00:59:03,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:59:03,947 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:59:04,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:59:04,382 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-12 00:59:04,383 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:59:04,383 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1190214117] [2023-11-12 00:59:04,383 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1190214117] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:59:04,384 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:59:04,384 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-12 00:59:04,384 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1401534525] [2023-11-12 00:59:04,384 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:59:04,386 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 00:59:04,386 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:59:04,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 00:59:04,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 00:59:04,387 INFO L87 Difference]: Start difference. First operand 789 states and 1207 transitions. Second operand has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 3 states have call successors, (11), 3 states have call predecessors, (11), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2023-11-12 00:59:04,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:59:04,827 INFO L93 Difference]: Finished difference Result 2337 states and 3609 transitions. [2023-11-12 00:59:04,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 00:59:04,828 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 3 states have call successors, (11), 3 states have call predecessors, (11), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 50 [2023-11-12 00:59:04,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:59:04,850 INFO L225 Difference]: With dead ends: 2337 [2023-11-12 00:59:04,851 INFO L226 Difference]: Without dead ends: 1561 [2023-11-12 00:59:04,860 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 00:59:04,863 INFO L413 NwaCegarLoop]: 687 mSDtfsCounter, 633 mSDsluCounter, 601 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 633 SdHoareTripleChecker+Valid, 1288 SdHoareTripleChecker+Invalid, 108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-12 00:59:04,864 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [633 Valid, 1288 Invalid, 108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 108 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-12 00:59:04,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1561 states. [2023-11-12 00:59:04,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1561 to 1489. [2023-11-12 00:59:04,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1489 states, 1019 states have (on average 1.4985279685966635) internal successors, (1527), 1071 states have internal predecessors, (1527), 377 states have call successors, (377), 99 states have call predecessors, (377), 92 states have return successors, (397), 346 states have call predecessors, (397), 371 states have call successors, (397) [2023-11-12 00:59:05,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1489 states to 1489 states and 2301 transitions. [2023-11-12 00:59:05,017 INFO L78 Accepts]: Start accepts. Automaton has 1489 states and 2301 transitions. Word has length 50 [2023-11-12 00:59:05,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:59:05,017 INFO L495 AbstractCegarLoop]: Abstraction has 1489 states and 2301 transitions. [2023-11-12 00:59:05,018 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 3 states have call successors, (11), 3 states have call predecessors, (11), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2023-11-12 00:59:05,018 INFO L276 IsEmpty]: Start isEmpty. Operand 1489 states and 2301 transitions. [2023-11-12 00:59:05,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2023-11-12 00:59:05,027 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:59:05,027 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:59:05,028 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-12 00:59:05,028 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:59:05,028 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:59:05,029 INFO L85 PathProgramCache]: Analyzing trace with hash 421391640, now seen corresponding path program 1 times [2023-11-12 00:59:05,029 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:59:05,029 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [845547128] [2023-11-12 00:59:05,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:59:05,029 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:59:05,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:59:05,673 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-11-12 00:59:05,673 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:59:05,674 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [845547128] [2023-11-12 00:59:05,674 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [845547128] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:59:05,674 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:59:05,674 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-12 00:59:05,674 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1504707993] [2023-11-12 00:59:05,675 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:59:05,676 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-12 00:59:05,676 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:59:05,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-12 00:59:05,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-12 00:59:05,677 INFO L87 Difference]: Start difference. First operand 1489 states and 2301 transitions. Second operand has 6 states, 5 states have (on average 10.0) internal successors, (50), 5 states have internal predecessors, (50), 3 states have call successors, (19), 3 states have call predecessors, (19), 3 states have return successors, (17), 4 states have call predecessors, (17), 3 states have call successors, (17) [2023-11-12 00:59:06,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:59:06,779 INFO L93 Difference]: Finished difference Result 3749 states and 5904 transitions. [2023-11-12 00:59:06,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-12 00:59:06,780 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 10.0) internal successors, (50), 5 states have internal predecessors, (50), 3 states have call successors, (19), 3 states have call predecessors, (19), 3 states have return successors, (17), 4 states have call predecessors, (17), 3 states have call successors, (17) Word has length 94 [2023-11-12 00:59:06,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:59:06,803 INFO L225 Difference]: With dead ends: 3749 [2023-11-12 00:59:06,804 INFO L226 Difference]: Without dead ends: 2272 [2023-11-12 00:59:06,817 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2023-11-12 00:59:06,818 INFO L413 NwaCegarLoop]: 678 mSDtfsCounter, 672 mSDsluCounter, 2414 mSDsCounter, 0 mSdLazyCounter, 480 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 688 SdHoareTripleChecker+Valid, 3092 SdHoareTripleChecker+Invalid, 522 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 480 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-12 00:59:06,819 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [688 Valid, 3092 Invalid, 522 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 480 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-12 00:59:06,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2272 states. [2023-11-12 00:59:06,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2272 to 2185. [2023-11-12 00:59:06,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2185 states, 1499 states have (on average 1.4916611074049366) internal successors, (2236), 1583 states have internal predecessors, (2236), 548 states have call successors, (548), 147 states have call predecessors, (548), 137 states have return successors, (617), 497 states have call predecessors, (617), 540 states have call successors, (617) [2023-11-12 00:59:07,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2185 states to 2185 states and 3401 transitions. [2023-11-12 00:59:07,031 INFO L78 Accepts]: Start accepts. Automaton has 2185 states and 3401 transitions. Word has length 94 [2023-11-12 00:59:07,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:59:07,032 INFO L495 AbstractCegarLoop]: Abstraction has 2185 states and 3401 transitions. [2023-11-12 00:59:07,032 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 10.0) internal successors, (50), 5 states have internal predecessors, (50), 3 states have call successors, (19), 3 states have call predecessors, (19), 3 states have return successors, (17), 4 states have call predecessors, (17), 3 states have call successors, (17) [2023-11-12 00:59:07,032 INFO L276 IsEmpty]: Start isEmpty. Operand 2185 states and 3401 transitions. [2023-11-12 00:59:07,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2023-11-12 00:59:07,038 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:59:07,038 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:59:07,039 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-12 00:59:07,039 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:59:07,039 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:59:07,040 INFO L85 PathProgramCache]: Analyzing trace with hash -1397959990, now seen corresponding path program 1 times [2023-11-12 00:59:07,040 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:59:07,040 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1950876076] [2023-11-12 00:59:07,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:59:07,041 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:59:07,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:59:07,460 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-11-12 00:59:07,461 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:59:07,461 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1950876076] [2023-11-12 00:59:07,461 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1950876076] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 00:59:07,462 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [827771684] [2023-11-12 00:59:07,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:59:07,462 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:59:07,463 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57ed01fe-1594-4a08-a8d7-f63e1b819fca/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:59:07,471 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57ed01fe-1594-4a08-a8d7-f63e1b819fca/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:59:07,508 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57ed01fe-1594-4a08-a8d7-f63e1b819fca/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-12 00:59:07,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:59:07,976 INFO L262 TraceCheckSpWp]: Trace formula consists of 1798 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-12 00:59:07,992 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:59:08,172 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-12 00:59:08,173 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 00:59:08,173 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [827771684] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:59:08,173 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-12 00:59:08,173 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2023-11-12 00:59:08,174 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [568635005] [2023-11-12 00:59:08,174 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:59:08,175 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 00:59:08,175 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:59:08,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 00:59:08,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-12 00:59:08,176 INFO L87 Difference]: Start difference. First operand 2185 states and 3401 transitions. Second operand has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 3 states have call successors, (18), 3 states have call predecessors, (18), 3 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2023-11-12 00:59:08,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:59:08,685 INFO L93 Difference]: Finished difference Result 6283 states and 10039 transitions. [2023-11-12 00:59:08,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 00:59:08,686 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 3 states have call successors, (18), 3 states have call predecessors, (18), 3 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) Word has length 93 [2023-11-12 00:59:08,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:59:08,733 INFO L225 Difference]: With dead ends: 6283 [2023-11-12 00:59:08,733 INFO L226 Difference]: Without dead ends: 4110 [2023-11-12 00:59:08,756 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-12 00:59:08,757 INFO L413 NwaCegarLoop]: 1105 mSDtfsCounter, 594 mSDsluCounter, 535 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 594 SdHoareTripleChecker+Valid, 1640 SdHoareTripleChecker+Invalid, 116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-12 00:59:08,757 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [594 Valid, 1640 Invalid, 116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-12 00:59:08,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4110 states. [2023-11-12 00:59:09,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4110 to 3992. [2023-11-12 00:59:09,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3992 states, 2753 states have (on average 1.5041772611696331) internal successors, (4141), 2923 states have internal predecessors, (4141), 981 states have call successors, (981), 264 states have call predecessors, (981), 257 states have return successors, (1150), 890 states have call predecessors, (1150), 973 states have call successors, (1150) [2023-11-12 00:59:09,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3992 states to 3992 states and 6272 transitions. [2023-11-12 00:59:09,185 INFO L78 Accepts]: Start accepts. Automaton has 3992 states and 6272 transitions. Word has length 93 [2023-11-12 00:59:09,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:59:09,186 INFO L495 AbstractCegarLoop]: Abstraction has 3992 states and 6272 transitions. [2023-11-12 00:59:09,186 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 3 states have call successors, (18), 3 states have call predecessors, (18), 3 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2023-11-12 00:59:09,186 INFO L276 IsEmpty]: Start isEmpty. Operand 3992 states and 6272 transitions. [2023-11-12 00:59:09,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2023-11-12 00:59:09,191 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:59:09,191 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:59:09,201 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57ed01fe-1594-4a08-a8d7-f63e1b819fca/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-11-12 00:59:09,401 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57ed01fe-1594-4a08-a8d7-f63e1b819fca/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:59:09,401 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:59:09,401 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:59:09,401 INFO L85 PathProgramCache]: Analyzing trace with hash 1171013813, now seen corresponding path program 1 times [2023-11-12 00:59:09,402 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:59:09,403 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [195677889] [2023-11-12 00:59:09,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:59:09,404 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:59:09,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:59:09,846 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-11-12 00:59:09,846 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:59:09,846 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [195677889] [2023-11-12 00:59:09,847 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [195677889] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 00:59:09,847 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1456319303] [2023-11-12 00:59:09,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:59:09,847 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:59:09,848 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57ed01fe-1594-4a08-a8d7-f63e1b819fca/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:59:09,851 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57ed01fe-1594-4a08-a8d7-f63e1b819fca/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:59:09,867 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57ed01fe-1594-4a08-a8d7-f63e1b819fca/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-12 00:59:10,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:59:10,282 INFO L262 TraceCheckSpWp]: Trace formula consists of 1799 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-12 00:59:10,291 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:59:10,402 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-12 00:59:10,403 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 00:59:10,403 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1456319303] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:59:10,403 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-12 00:59:10,403 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2023-11-12 00:59:10,404 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1743269287] [2023-11-12 00:59:10,404 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:59:10,405 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 00:59:10,405 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:59:10,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 00:59:10,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-12 00:59:10,406 INFO L87 Difference]: Start difference. First operand 3992 states and 6272 transitions. Second operand has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 3 states have call successors, (18), 3 states have call predecessors, (18), 3 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2023-11-12 00:59:11,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:59:11,016 INFO L93 Difference]: Finished difference Result 8977 states and 14257 transitions. [2023-11-12 00:59:11,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 00:59:11,017 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 3 states have call successors, (18), 3 states have call predecessors, (18), 3 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) Word has length 94 [2023-11-12 00:59:11,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:59:11,092 INFO L225 Difference]: With dead ends: 8977 [2023-11-12 00:59:11,092 INFO L226 Difference]: Without dead ends: 4997 [2023-11-12 00:59:11,136 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-12 00:59:11,140 INFO L413 NwaCegarLoop]: 753 mSDtfsCounter, 592 mSDsluCounter, 534 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 592 SdHoareTripleChecker+Valid, 1287 SdHoareTripleChecker+Invalid, 95 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-12 00:59:11,141 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [592 Valid, 1287 Invalid, 95 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-12 00:59:11,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4997 states. [2023-11-12 00:59:11,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4997 to 4933. [2023-11-12 00:59:11,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4933 states, 3413 states have (on average 1.5145033694696748) internal successors, (5169), 3626 states have internal predecessors, (5169), 1202 states have call successors, (1202), 321 states have call predecessors, (1202), 317 states have return successors, (1408), 1094 states have call predecessors, (1408), 1194 states have call successors, (1408) [2023-11-12 00:59:11,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4933 states to 4933 states and 7779 transitions. [2023-11-12 00:59:11,698 INFO L78 Accepts]: Start accepts. Automaton has 4933 states and 7779 transitions. Word has length 94 [2023-11-12 00:59:11,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:59:11,700 INFO L495 AbstractCegarLoop]: Abstraction has 4933 states and 7779 transitions. [2023-11-12 00:59:11,701 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 3 states have call successors, (18), 3 states have call predecessors, (18), 3 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2023-11-12 00:59:11,701 INFO L276 IsEmpty]: Start isEmpty. Operand 4933 states and 7779 transitions. [2023-11-12 00:59:11,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2023-11-12 00:59:11,715 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:59:11,715 INFO L195 NwaCegarLoop]: trace histogram [3, 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] [2023-11-12 00:59:11,733 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57ed01fe-1594-4a08-a8d7-f63e1b819fca/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-12 00:59:11,926 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57ed01fe-1594-4a08-a8d7-f63e1b819fca/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:59:11,926 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:59:11,927 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:59:11,927 INFO L85 PathProgramCache]: Analyzing trace with hash -872877500, now seen corresponding path program 1 times [2023-11-12 00:59:11,927 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:59:11,927 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1804262439] [2023-11-12 00:59:11,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:59:11,928 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:59:11,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:59:12,961 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-11-12 00:59:12,962 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:59:12,962 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1804262439] [2023-11-12 00:59:12,962 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1804262439] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 00:59:12,962 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [344349460] [2023-11-12 00:59:12,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:59:12,963 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:59:12,963 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57ed01fe-1594-4a08-a8d7-f63e1b819fca/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:59:12,968 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57ed01fe-1594-4a08-a8d7-f63e1b819fca/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:59:12,995 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57ed01fe-1594-4a08-a8d7-f63e1b819fca/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-12 00:59:13,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:59:13,477 INFO L262 TraceCheckSpWp]: Trace formula consists of 1825 conjuncts, 21 conjunts are in the unsatisfiable core [2023-11-12 00:59:13,486 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:59:14,058 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-11-12 00:59:14,058 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 00:59:14,495 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-11-12 00:59:14,495 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [344349460] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 00:59:14,495 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [240276895] [2023-11-12 00:59:14,519 INFO L159 IcfgInterpreter]: Started Sifa with 87 locations of interest [2023-11-12 00:59:14,519 INFO L166 IcfgInterpreter]: Building call graph [2023-11-12 00:59:14,523 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-12 00:59:14,529 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-12 00:59:14,529 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-12 00:59:34,768 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 578 for LOIs