./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/elevator_spec3_product26.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 4fc63b2a 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_dc3e116b-89de-4a06-b84e-9870f8a276b0/bin/utaipan-verify-DbMuA5NWw2/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc3e116b-89de-4a06-b84e-9870f8a276b0/bin/utaipan-verify-DbMuA5NWw2/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc3e116b-89de-4a06-b84e-9870f8a276b0/bin/utaipan-verify-DbMuA5NWw2/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc3e116b-89de-4a06-b84e-9870f8a276b0/bin/utaipan-verify-DbMuA5NWw2/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec3_product26.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc3e116b-89de-4a06-b84e-9870f8a276b0/bin/utaipan-verify-DbMuA5NWw2/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc3e116b-89de-4a06-b84e-9870f8a276b0/bin/utaipan-verify-DbMuA5NWw2 --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 64b60b46be25872d2112a950c23ddbe99bccee21bea4e463fd90753650d2a7bd --- Real Ultimate output --- This is Ultimate 0.2.5-dev-4fc63b2 [2024-11-02 12:32:13,846 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-02 12:32:13,955 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc3e116b-89de-4a06-b84e-9870f8a276b0/bin/utaipan-verify-DbMuA5NWw2/config/svcomp-Reach-32bit-Taipan_Default.epf [2024-11-02 12:32:13,961 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-02 12:32:13,961 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-02 12:32:13,987 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-02 12:32:13,987 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-02 12:32:13,988 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-02 12:32:13,989 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-02 12:32:13,989 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-02 12:32:13,990 INFO L153 SettingsManager]: * User list type=DISABLED [2024-11-02 12:32:13,990 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2024-11-02 12:32:13,991 INFO L153 SettingsManager]: * Explicit value domain=true [2024-11-02 12:32:13,991 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2024-11-02 12:32:13,992 INFO L153 SettingsManager]: * Octagon Domain=false [2024-11-02 12:32:13,992 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2024-11-02 12:32:13,993 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2024-11-02 12:32:13,993 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2024-11-02 12:32:13,994 INFO L153 SettingsManager]: * Interval Domain=false [2024-11-02 12:32:13,994 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2024-11-02 12:32:13,995 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2024-11-02 12:32:13,996 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2024-11-02 12:32:13,996 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-02 12:32:13,997 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-02 12:32:13,997 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-02 12:32:13,998 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-02 12:32:13,998 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-02 12:32:13,999 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-02 12:32:13,999 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-02 12:32:14,000 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-02 12:32:14,000 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-02 12:32:14,001 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-02 12:32:14,001 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-02 12:32:14,001 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-02 12:32:14,002 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-02 12:32:14,002 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-02 12:32:14,003 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-02 12:32:14,003 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-02 12:32:14,003 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-02 12:32:14,004 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-02 12:32:14,004 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-02 12:32:14,005 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-02 12:32:14,005 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2024-11-02 12:32:14,005 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-02 12:32:14,006 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-02 12:32:14,006 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2024-11-02 12:32:14,006 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-02 12:32:14,007 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_dc3e116b-89de-4a06-b84e-9870f8a276b0/bin/utaipan-verify-DbMuA5NWw2/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc3e116b-89de-4a06-b84e-9870f8a276b0/bin/utaipan-verify-DbMuA5NWw2 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 64b60b46be25872d2112a950c23ddbe99bccee21bea4e463fd90753650d2a7bd [2024-11-02 12:32:14,357 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-02 12:32:14,393 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-02 12:32:14,396 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-02 12:32:14,399 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-02 12:32:14,399 INFO L274 PluginConnector]: CDTParser initialized [2024-11-02 12:32:14,401 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc3e116b-89de-4a06-b84e-9870f8a276b0/bin/utaipan-verify-DbMuA5NWw2/../../sv-benchmarks/c/product-lines/elevator_spec3_product26.cil.c Unable to find full path for "g++" [2024-11-02 12:32:16,396 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-02 12:32:16,837 INFO L384 CDTParser]: Found 1 translation units. [2024-11-02 12:32:16,837 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc3e116b-89de-4a06-b84e-9870f8a276b0/sv-benchmarks/c/product-lines/elevator_spec3_product26.cil.c [2024-11-02 12:32:16,873 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc3e116b-89de-4a06-b84e-9870f8a276b0/bin/utaipan-verify-DbMuA5NWw2/data/de914107b/b0f04fae0ec647cdaa212d8bf4106fde/FLAG2212ffb5c [2024-11-02 12:32:16,895 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc3e116b-89de-4a06-b84e-9870f8a276b0/bin/utaipan-verify-DbMuA5NWw2/data/de914107b/b0f04fae0ec647cdaa212d8bf4106fde [2024-11-02 12:32:16,898 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-02 12:32:16,900 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-02 12:32:16,902 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-02 12:32:16,902 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-02 12:32:16,912 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-02 12:32:16,915 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 12:32:16" (1/1) ... [2024-11-02 12:32:16,916 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@652fcf83 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:32:16, skipping insertion in model container [2024-11-02 12:32:16,917 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 12:32:16" (1/1) ... [2024-11-02 12:32:17,009 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-02 12:32:17,773 WARN L251 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_dc3e116b-89de-4a06-b84e-9870f8a276b0/sv-benchmarks/c/product-lines/elevator_spec3_product26.cil.c[67702,67715] [2024-11-02 12:32:17,788 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-02 12:32:17,805 INFO L200 MainTranslator]: Completed pre-run [2024-11-02 12:32:17,817 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"scenario.i","") [48] [2024-11-02 12:32:17,819 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"UnitTests.i","") [67] [2024-11-02 12:32:17,819 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Test.i","") [168] [2024-11-02 12:32:17,819 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Elevator.i","") [520] [2024-11-02 12:32:17,820 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"libacc.i","") [2041] [2024-11-02 12:32:17,820 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Floor.i","") [2407] [2024-11-02 12:32:17,820 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Person.i","") [3068] [2024-11-02 12:32:17,820 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"wsllib_check.i","") [3186] [2024-11-02 12:32:17,821 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"featureselect.i","") [3195] [2024-11-02 12:32:17,821 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Specification3_spec.i","") [3230] [2024-11-02 12:32:17,986 WARN L251 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_dc3e116b-89de-4a06-b84e-9870f8a276b0/sv-benchmarks/c/product-lines/elevator_spec3_product26.cil.c[67702,67715] [2024-11-02 12:32:17,992 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-02 12:32:18,027 INFO L204 MainTranslator]: Completed translation [2024-11-02 12:32:18,028 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:32:18 WrapperNode [2024-11-02 12:32:18,028 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-02 12:32:18,029 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-02 12:32:18,030 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-02 12:32:18,030 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-02 12:32:18,039 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:32:18" (1/1) ... [2024-11-02 12:32:18,069 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:32:18" (1/1) ... [2024-11-02 12:32:18,138 INFO L138 Inliner]: procedures = 91, calls = 346, calls flagged for inlining = 27, calls inlined = 23, statements flattened = 862 [2024-11-02 12:32:18,138 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-02 12:32:18,139 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-02 12:32:18,139 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-02 12:32:18,139 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-02 12:32:18,151 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:32:18" (1/1) ... [2024-11-02 12:32:18,151 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:32:18" (1/1) ... [2024-11-02 12:32:18,181 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:32:18" (1/1) ... [2024-11-02 12:32:18,182 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:32:18" (1/1) ... [2024-11-02 12:32:18,236 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:32:18" (1/1) ... [2024-11-02 12:32:18,249 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:32:18" (1/1) ... [2024-11-02 12:32:18,254 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:32:18" (1/1) ... [2024-11-02 12:32:18,259 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:32:18" (1/1) ... [2024-11-02 12:32:18,266 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-02 12:32:18,267 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-02 12:32:18,268 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-02 12:32:18,268 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-02 12:32:18,269 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:32:18" (1/1) ... [2024-11-02 12:32:18,275 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-02 12:32:18,288 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc3e116b-89de-4a06-b84e-9870f8a276b0/bin/utaipan-verify-DbMuA5NWw2/z3 [2024-11-02 12:32:18,313 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc3e116b-89de-4a06-b84e-9870f8a276b0/bin/utaipan-verify-DbMuA5NWw2/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2024-11-02 12:32:18,327 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc3e116b-89de-4a06-b84e-9870f8a276b0/bin/utaipan-verify-DbMuA5NWw2/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2024-11-02 12:32:18,362 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-02 12:32:18,362 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentHeading [2024-11-02 12:32:18,363 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentHeading [2024-11-02 12:32:18,363 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2024-11-02 12:32:18,363 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2024-11-02 12:32:18,363 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2024-11-02 12:32:18,363 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2024-11-02 12:32:18,364 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2024-11-02 12:32:18,364 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2024-11-02 12:32:18,364 INFO L130 BoogieDeclarations]: Found specification of procedure bobCall [2024-11-02 12:32:18,364 INFO L138 BoogieDeclarations]: Found implementation of procedure bobCall [2024-11-02 12:32:18,364 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2024-11-02 12:32:18,364 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2024-11-02 12:32:18,365 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2024-11-02 12:32:18,365 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2024-11-02 12:32:18,365 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2024-11-02 12:32:18,365 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2024-11-02 12:32:18,365 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2024-11-02 12:32:18,365 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2024-11-02 12:32:18,366 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2024-11-02 12:32:18,366 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2024-11-02 12:32:18,366 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2024-11-02 12:32:18,366 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2024-11-02 12:32:18,366 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2024-11-02 12:32:18,366 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2024-11-02 12:32:18,367 INFO L130 BoogieDeclarations]: Found specification of procedure initTopDown [2024-11-02 12:32:18,367 INFO L138 BoogieDeclarations]: Found implementation of procedure initTopDown [2024-11-02 12:32:18,367 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2024-11-02 12:32:18,368 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2024-11-02 12:32:18,368 INFO L130 BoogieDeclarations]: Found specification of procedure initFloors [2024-11-02 12:32:18,368 INFO L138 BoogieDeclarations]: Found implementation of procedure initFloors [2024-11-02 12:32:18,368 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2024-11-02 12:32:18,369 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2024-11-02 12:32:18,369 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift__wrappee__empty [2024-11-02 12:32:18,369 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift__wrappee__empty [2024-11-02 12:32:18,369 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2024-11-02 12:32:18,369 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2024-11-02 12:32:18,370 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2024-11-02 12:32:18,370 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2024-11-02 12:32:18,370 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2024-11-02 12:32:18,370 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2024-11-02 12:32:18,371 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2024-11-02 12:32:18,371 INFO L130 BoogieDeclarations]: Found specification of procedure buttonForFloorIsPressed [2024-11-02 12:32:18,371 INFO L138 BoogieDeclarations]: Found implementation of procedure buttonForFloorIsPressed [2024-11-02 12:32:18,371 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2024-11-02 12:32:18,371 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2024-11-02 12:32:18,372 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2024-11-02 12:32:18,372 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2024-11-02 12:32:18,372 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2024-11-02 12:32:18,372 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2024-11-02 12:32:18,373 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-02 12:32:18,373 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-02 12:32:18,373 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2024-11-02 12:32:18,373 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2024-11-02 12:32:18,554 INFO L238 CfgBuilder]: Building ICFG [2024-11-02 12:32:18,557 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-02 12:32:20,439 INFO L? ?]: Removed 451 outVars from TransFormulas that were not future-live. [2024-11-02 12:32:20,440 INFO L287 CfgBuilder]: Performing block encoding [2024-11-02 12:32:21,523 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-02 12:32:21,523 INFO L316 CfgBuilder]: Removed 1 assume(true) statements. [2024-11-02 12:32:21,524 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 12:32:21 BoogieIcfgContainer [2024-11-02 12:32:21,524 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-02 12:32:21,529 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-02 12:32:21,529 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-02 12:32:21,535 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-02 12:32:21,536 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.11 12:32:16" (1/3) ... [2024-11-02 12:32:21,537 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@146eb45 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 12:32:21, skipping insertion in model container [2024-11-02 12:32:21,537 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:32:18" (2/3) ... [2024-11-02 12:32:21,538 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@146eb45 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 12:32:21, skipping insertion in model container [2024-11-02 12:32:21,538 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 12:32:21" (3/3) ... [2024-11-02 12:32:21,540 INFO L112 eAbstractionObserver]: Analyzing ICFG elevator_spec3_product26.cil.c [2024-11-02 12:32:21,567 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-02 12:32:21,567 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-11-02 12:32:21,702 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-02 12:32:21,711 INFO L333 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, 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;@302de6f5, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-02 12:32:21,713 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-02 12:32:21,722 INFO L276 IsEmpty]: Start isEmpty. Operand has 390 states, 261 states have (on average 1.5900383141762453) internal successors, (415), 281 states have internal predecessors, (415), 102 states have call successors, (102), 25 states have call predecessors, (102), 25 states have return successors, (102), 98 states have call predecessors, (102), 102 states have call successors, (102) [2024-11-02 12:32:21,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2024-11-02 12:32:21,738 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:32:21,739 INFO L215 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] [2024-11-02 12:32:21,741 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 12:32:21,748 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:32:21,749 INFO L85 PathProgramCache]: Analyzing trace with hash 1572057387, now seen corresponding path program 1 times [2024-11-02 12:32:21,761 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:32:21,762 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1246566971] [2024-11-02 12:32:21,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:32:21,764 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:32:22,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:32:22,896 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-02 12:32:22,896 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 12:32:22,897 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1246566971] [2024-11-02 12:32:22,898 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1246566971] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-02 12:32:22,898 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [537607012] [2024-11-02 12:32:22,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:32:22,899 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 12:32:22,899 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc3e116b-89de-4a06-b84e-9870f8a276b0/bin/utaipan-verify-DbMuA5NWw2/z3 [2024-11-02 12:32:22,903 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc3e116b-89de-4a06-b84e-9870f8a276b0/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-02 12:32:22,905 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc3e116b-89de-4a06-b84e-9870f8a276b0/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-02 12:32:23,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:32:23,550 INFO L255 TraceCheckSpWp]: Trace formula consists of 1429 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-02 12:32:23,560 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-02 12:32:23,635 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-02 12:32:23,638 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-02 12:32:23,639 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [537607012] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-02 12:32:23,639 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-02 12:32:23,639 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2024-11-02 12:32:23,642 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2058578312] [2024-11-02 12:32:23,642 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-02 12:32:23,648 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-02 12:32:23,649 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 12:32:23,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-02 12:32:23,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2024-11-02 12:32:23,684 INFO L87 Difference]: Start difference. First operand has 390 states, 261 states have (on average 1.5900383141762453) internal successors, (415), 281 states have internal predecessors, (415), 102 states have call successors, (102), 25 states have call predecessors, (102), 25 states have return successors, (102), 98 states have call predecessors, (102), 102 states have call successors, (102) 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, (9), 3 states have call predecessors, (9), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2024-11-02 12:32:24,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 12:32:24,131 INFO L93 Difference]: Finished difference Result 1095 states and 1764 transitions. [2024-11-02 12:32:24,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-02 12:32:24,134 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, (9), 3 states have call predecessors, (9), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 45 [2024-11-02 12:32:24,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 12:32:24,168 INFO L225 Difference]: With dead ends: 1095 [2024-11-02 12:32:24,169 INFO L226 Difference]: Without dead ends: 707 [2024-11-02 12:32:24,182 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2024-11-02 12:32:24,188 INFO L432 NwaCegarLoop]: 581 mSDtfsCounter, 585 mSDsluCounter, 488 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 585 SdHoareTripleChecker+Valid, 1069 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-02 12:32:24,191 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [585 Valid, 1069 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-02 12:32:24,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 707 states. [2024-11-02 12:32:24,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 707 to 695. [2024-11-02 12:32:24,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 695 states, 470 states have (on average 1.5829787234042554) internal successors, (744), 505 states have internal predecessors, (744), 180 states have call successors, (180), 45 states have call predecessors, (180), 44 states have return successors, (182), 172 states have call predecessors, (182), 177 states have call successors, (182) [2024-11-02 12:32:24,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 695 states to 695 states and 1106 transitions. [2024-11-02 12:32:24,347 INFO L78 Accepts]: Start accepts. Automaton has 695 states and 1106 transitions. Word has length 45 [2024-11-02 12:32:24,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 12:32:24,348 INFO L471 AbstractCegarLoop]: Abstraction has 695 states and 1106 transitions. [2024-11-02 12:32:24,349 INFO L472 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, (9), 3 states have call predecessors, (9), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2024-11-02 12:32:24,349 INFO L276 IsEmpty]: Start isEmpty. Operand 695 states and 1106 transitions. [2024-11-02 12:32:24,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2024-11-02 12:32:24,354 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:32:24,355 INFO L215 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] [2024-11-02 12:32:24,380 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc3e116b-89de-4a06-b84e-9870f8a276b0/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-02 12:32:24,560 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc3e116b-89de-4a06-b84e-9870f8a276b0/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2024-11-02 12:32:24,561 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 12:32:24,561 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:32:24,561 INFO L85 PathProgramCache]: Analyzing trace with hash -1390007206, now seen corresponding path program 1 times [2024-11-02 12:32:24,562 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:32:24,562 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1929582678] [2024-11-02 12:32:24,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:32:24,563 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:32:24,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:32:25,162 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-02 12:32:25,164 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 12:32:25,164 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1929582678] [2024-11-02 12:32:25,164 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1929582678] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-02 12:32:25,165 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-02 12:32:25,165 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-02 12:32:25,165 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2106167603] [2024-11-02 12:32:25,167 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-02 12:32:25,168 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-02 12:32:25,168 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 12:32:25,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-02 12:32:25,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-02 12:32:25,169 INFO L87 Difference]: Start difference. First operand 695 states and 1106 transitions. Second operand has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 3 states have call successors, (10), 3 states have call predecessors, (10), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2024-11-02 12:32:25,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 12:32:25,559 INFO L93 Difference]: Finished difference Result 2057 states and 3312 transitions. [2024-11-02 12:32:25,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-02 12:32:25,560 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 3 states have call successors, (10), 3 states have call predecessors, (10), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 46 [2024-11-02 12:32:25,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 12:32:25,578 INFO L225 Difference]: With dead ends: 2057 [2024-11-02 12:32:25,578 INFO L226 Difference]: Without dead ends: 1374 [2024-11-02 12:32:25,582 INFO L431 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 [2024-11-02 12:32:25,584 INFO L432 NwaCegarLoop]: 627 mSDtfsCounter, 576 mSDsluCounter, 546 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 576 SdHoareTripleChecker+Valid, 1173 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-02 12:32:25,585 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [576 Valid, 1173 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 98 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-02 12:32:25,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1374 states. [2024-11-02 12:32:25,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1374 to 1290. [2024-11-02 12:32:25,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1290 states, 903 states have (on average 1.6046511627906976) internal successors, (1449), 957 states have internal predecessors, (1449), 311 states have call successors, (311), 76 states have call predecessors, (311), 75 states have return successors, (330), 286 states have call predecessors, (330), 307 states have call successors, (330) [2024-11-02 12:32:25,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1290 states to 1290 states and 2090 transitions. [2024-11-02 12:32:25,753 INFO L78 Accepts]: Start accepts. Automaton has 1290 states and 2090 transitions. Word has length 46 [2024-11-02 12:32:25,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 12:32:25,754 INFO L471 AbstractCegarLoop]: Abstraction has 1290 states and 2090 transitions. [2024-11-02 12:32:25,754 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 3 states have call successors, (10), 3 states have call predecessors, (10), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2024-11-02 12:32:25,754 INFO L276 IsEmpty]: Start isEmpty. Operand 1290 states and 2090 transitions. [2024-11-02 12:32:25,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2024-11-02 12:32:25,767 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:32:25,767 INFO L215 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, 1] [2024-11-02 12:32:25,767 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-02 12:32:25,768 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 12:32:25,768 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:32:25,768 INFO L85 PathProgramCache]: Analyzing trace with hash 735812807, now seen corresponding path program 1 times [2024-11-02 12:32:25,769 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:32:25,769 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [767867875] [2024-11-02 12:32:25,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:32:25,769 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:32:25,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:32:26,231 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-02 12:32:26,232 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 12:32:26,232 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [767867875] [2024-11-02 12:32:26,232 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [767867875] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-02 12:32:26,232 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-02 12:32:26,232 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-02 12:32:26,233 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [860870976] [2024-11-02 12:32:26,233 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-02 12:32:26,233 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-02 12:32:26,233 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 12:32:26,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-02 12:32:26,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-02 12:32:26,236 INFO L87 Difference]: Start difference. First operand 1290 states and 2090 transitions. Second operand has 4 states, 4 states have (on average 10.5) internal successors, (42), 4 states have internal predecessors, (42), 3 states have call successors, (14), 3 states have call predecessors, (14), 1 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2024-11-02 12:32:26,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 12:32:26,537 INFO L93 Difference]: Finished difference Result 2925 states and 4747 transitions. [2024-11-02 12:32:26,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-02 12:32:26,538 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), 3 states have call successors, (14), 3 states have call predecessors, (14), 1 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) Word has length 69 [2024-11-02 12:32:26,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 12:32:26,552 INFO L225 Difference]: With dead ends: 2925 [2024-11-02 12:32:26,552 INFO L226 Difference]: Without dead ends: 1647 [2024-11-02 12:32:26,559 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-11-02 12:32:26,561 INFO L432 NwaCegarLoop]: 643 mSDtfsCounter, 409 mSDsluCounter, 984 mSDsCounter, 0 mSdLazyCounter, 113 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 409 SdHoareTripleChecker+Valid, 1627 SdHoareTripleChecker+Invalid, 115 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-02 12:32:26,561 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [409 Valid, 1627 Invalid, 115 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 113 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-02 12:32:26,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1647 states. [2024-11-02 12:32:26,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1647 to 1609. [2024-11-02 12:32:26,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1609 states, 1119 states have (on average 1.5630026809651474) internal successors, (1749), 1173 states have internal predecessors, (1749), 386 states have call successors, (386), 104 states have call predecessors, (386), 103 states have return successors, (464), 359 states have call predecessors, (464), 380 states have call successors, (464) [2024-11-02 12:32:26,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1609 states to 1609 states and 2599 transitions. [2024-11-02 12:32:26,762 INFO L78 Accepts]: Start accepts. Automaton has 1609 states and 2599 transitions. Word has length 69 [2024-11-02 12:32:26,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 12:32:26,762 INFO L471 AbstractCegarLoop]: Abstraction has 1609 states and 2599 transitions. [2024-11-02 12:32:26,763 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.5) internal successors, (42), 4 states have internal predecessors, (42), 3 states have call successors, (14), 3 states have call predecessors, (14), 1 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2024-11-02 12:32:26,763 INFO L276 IsEmpty]: Start isEmpty. Operand 1609 states and 2599 transitions. [2024-11-02 12:32:26,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2024-11-02 12:32:26,768 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:32:26,769 INFO L215 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, 1, 1] [2024-11-02 12:32:26,769 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-02 12:32:26,770 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 12:32:26,770 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:32:26,770 INFO L85 PathProgramCache]: Analyzing trace with hash 1775828163, now seen corresponding path program 1 times [2024-11-02 12:32:26,771 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:32:26,771 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1379312495] [2024-11-02 12:32:26,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:32:26,771 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:32:26,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:32:27,212 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-02 12:32:27,212 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 12:32:27,213 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1379312495] [2024-11-02 12:32:27,213 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1379312495] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-02 12:32:27,213 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-02 12:32:27,213 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-02 12:32:27,213 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2110599581] [2024-11-02 12:32:27,213 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-02 12:32:27,214 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-02 12:32:27,214 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 12:32:27,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-02 12:32:27,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-02 12:32:27,215 INFO L87 Difference]: Start difference. First operand 1609 states and 2599 transitions. Second operand has 6 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 3 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (12), 4 states have call predecessors, (12), 3 states have call successors, (12) [2024-11-02 12:32:28,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 12:32:28,180 INFO L93 Difference]: Finished difference Result 3966 states and 6575 transitions. [2024-11-02 12:32:28,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-02 12:32:28,181 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 3 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (12), 4 states have call predecessors, (12), 3 states have call successors, (12) Word has length 70 [2024-11-02 12:32:28,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 12:32:28,200 INFO L225 Difference]: With dead ends: 3966 [2024-11-02 12:32:28,200 INFO L226 Difference]: Without dead ends: 2369 [2024-11-02 12:32:28,212 INFO L431 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 [2024-11-02 12:32:28,213 INFO L432 NwaCegarLoop]: 626 mSDtfsCounter, 561 mSDsluCounter, 2232 mSDsCounter, 0 mSdLazyCounter, 434 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 572 SdHoareTripleChecker+Valid, 2858 SdHoareTripleChecker+Invalid, 459 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 434 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-11-02 12:32:28,213 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [572 Valid, 2858 Invalid, 459 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 434 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-11-02 12:32:28,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2369 states. [2024-11-02 12:32:28,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2369 to 2333. [2024-11-02 12:32:28,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2333 states, 1628 states have (on average 1.5546683046683047) internal successors, (2531), 1714 states have internal predecessors, (2531), 552 states have call successors, (552), 153 states have call predecessors, (552), 152 states have return successors, (723), 509 states have call predecessors, (723), 544 states have call successors, (723) [2024-11-02 12:32:28,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2333 states to 2333 states and 3806 transitions. [2024-11-02 12:32:28,415 INFO L78 Accepts]: Start accepts. Automaton has 2333 states and 3806 transitions. Word has length 70 [2024-11-02 12:32:28,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 12:32:28,416 INFO L471 AbstractCegarLoop]: Abstraction has 2333 states and 3806 transitions. [2024-11-02 12:32:28,416 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 3 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (12), 4 states have call predecessors, (12), 3 states have call successors, (12) [2024-11-02 12:32:28,416 INFO L276 IsEmpty]: Start isEmpty. Operand 2333 states and 3806 transitions. [2024-11-02 12:32:28,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2024-11-02 12:32:28,419 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:32:28,419 INFO L215 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, 1, 1] [2024-11-02 12:32:28,419 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-02 12:32:28,419 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 12:32:28,420 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:32:28,420 INFO L85 PathProgramCache]: Analyzing trace with hash -366657403, now seen corresponding path program 1 times [2024-11-02 12:32:28,425 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:32:28,425 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1503652665] [2024-11-02 12:32:28,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:32:28,425 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:32:28,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:32:28,736 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-02 12:32:28,736 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 12:32:28,737 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1503652665] [2024-11-02 12:32:28,737 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1503652665] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-02 12:32:28,737 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [995583019] [2024-11-02 12:32:28,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:32:28,737 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 12:32:28,738 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc3e116b-89de-4a06-b84e-9870f8a276b0/bin/utaipan-verify-DbMuA5NWw2/z3 [2024-11-02 12:32:28,739 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc3e116b-89de-4a06-b84e-9870f8a276b0/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-02 12:32:28,745 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc3e116b-89de-4a06-b84e-9870f8a276b0/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-02 12:32:29,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:32:29,200 INFO L255 TraceCheckSpWp]: Trace formula consists of 1704 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-02 12:32:29,206 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-02 12:32:29,317 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-02 12:32:29,317 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-02 12:32:29,317 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [995583019] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-02 12:32:29,318 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-02 12:32:29,318 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2024-11-02 12:32:29,318 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1829407041] [2024-11-02 12:32:29,318 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-02 12:32:29,318 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-02 12:32:29,319 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 12:32:29,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-02 12:32:29,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2024-11-02 12:32:29,319 INFO L87 Difference]: Start difference. First operand 2333 states and 3806 transitions. Second operand has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 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) [2024-11-02 12:32:29,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 12:32:29,800 INFO L93 Difference]: Finished difference Result 5739 states and 9684 transitions. [2024-11-02 12:32:29,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-02 12:32:29,801 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 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 70 [2024-11-02 12:32:29,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 12:32:29,841 INFO L225 Difference]: With dead ends: 5739 [2024-11-02 12:32:29,841 INFO L226 Difference]: Without dead ends: 3418 [2024-11-02 12:32:29,864 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2024-11-02 12:32:29,865 INFO L432 NwaCegarLoop]: 573 mSDtfsCounter, 553 mSDsluCounter, 482 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 553 SdHoareTripleChecker+Valid, 1055 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-02 12:32:29,866 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [553 Valid, 1055 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-02 12:32:29,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3418 states. [2024-11-02 12:32:30,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3418 to 3273. [2024-11-02 12:32:30,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3273 states, 2297 states have (on average 1.5559425337396604) internal successors, (3574), 2427 states have internal predecessors, (3574), 760 states have call successors, (760), 210 states have call predecessors, (760), 215 states have return successors, (1032), 701 states have call predecessors, (1032), 752 states have call successors, (1032) [2024-11-02 12:32:30,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3273 states to 3273 states and 5366 transitions. [2024-11-02 12:32:30,263 INFO L78 Accepts]: Start accepts. Automaton has 3273 states and 5366 transitions. Word has length 70 [2024-11-02 12:32:30,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 12:32:30,265 INFO L471 AbstractCegarLoop]: Abstraction has 3273 states and 5366 transitions. [2024-11-02 12:32:30,265 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 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) [2024-11-02 12:32:30,265 INFO L276 IsEmpty]: Start isEmpty. Operand 3273 states and 5366 transitions. [2024-11-02 12:32:30,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2024-11-02 12:32:30,272 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:32:30,272 INFO L215 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, 1, 1, 1] [2024-11-02 12:32:30,301 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc3e116b-89de-4a06-b84e-9870f8a276b0/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-11-02 12:32:30,473 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc3e116b-89de-4a06-b84e-9870f8a276b0/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 12:32:30,474 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 12:32:30,477 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:32:30,477 INFO L85 PathProgramCache]: Analyzing trace with hash 1531153482, now seen corresponding path program 1 times [2024-11-02 12:32:30,478 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:32:30,478 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1367995378] [2024-11-02 12:32:30,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:32:30,479 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:32:30,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:32:30,837 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-02 12:32:30,837 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 12:32:30,837 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1367995378] [2024-11-02 12:32:30,837 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1367995378] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-02 12:32:30,837 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [576922071] [2024-11-02 12:32:30,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:32:30,838 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 12:32:30,838 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc3e116b-89de-4a06-b84e-9870f8a276b0/bin/utaipan-verify-DbMuA5NWw2/z3 [2024-11-02 12:32:30,840 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc3e116b-89de-4a06-b84e-9870f8a276b0/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-02 12:32:30,841 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc3e116b-89de-4a06-b84e-9870f8a276b0/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-02 12:32:31,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:32:31,290 INFO L255 TraceCheckSpWp]: Trace formula consists of 1714 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-02 12:32:31,296 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-02 12:32:31,386 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-02 12:32:31,386 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-02 12:32:31,386 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [576922071] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-02 12:32:31,386 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-02 12:32:31,386 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 8 [2024-11-02 12:32:31,387 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1015461620] [2024-11-02 12:32:31,387 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-02 12:32:31,387 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-02 12:32:31,387 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 12:32:31,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-02 12:32:31,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2024-11-02 12:32:31,388 INFO L87 Difference]: Start difference. First operand 3273 states and 5366 transitions. Second operand has 4 states, 4 states have (on average 11.25) internal successors, (45), 4 states have internal predecessors, (45), 4 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (12), 3 states have call predecessors, (12), 4 states have call successors, (12) [2024-11-02 12:32:32,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 12:32:32,225 INFO L93 Difference]: Finished difference Result 8343 states and 13912 transitions. [2024-11-02 12:32:32,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-02 12:32:32,226 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.25) internal successors, (45), 4 states have internal predecessors, (45), 4 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (12), 3 states have call predecessors, (12), 4 states have call successors, (12) Word has length 71 [2024-11-02 12:32:32,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 12:32:32,277 INFO L225 Difference]: With dead ends: 8343 [2024-11-02 12:32:32,277 INFO L226 Difference]: Without dead ends: 5082 [2024-11-02 12:32:32,311 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-11-02 12:32:32,313 INFO L432 NwaCegarLoop]: 599 mSDtfsCounter, 487 mSDsluCounter, 1067 mSDsCounter, 0 mSdLazyCounter, 301 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 488 SdHoareTripleChecker+Valid, 1666 SdHoareTripleChecker+Invalid, 340 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 301 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-02 12:32:32,314 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [488 Valid, 1666 Invalid, 340 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 301 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-02 12:32:32,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5082 states. [2024-11-02 12:32:32,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5082 to 5034. [2024-11-02 12:32:32,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5034 states, 3538 states have (on average 1.5146975692481628) internal successors, (5359), 3752 states have internal predecessors, (5359), 1163 states have call successors, (1163), 336 states have call predecessors, (1163), 332 states have return successors, (1512), 1051 states have call predecessors, (1512), 1152 states have call successors, (1512) [2024-11-02 12:32:32,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5034 states to 5034 states and 8034 transitions. [2024-11-02 12:32:32,723 INFO L78 Accepts]: Start accepts. Automaton has 5034 states and 8034 transitions. Word has length 71 [2024-11-02 12:32:32,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 12:32:32,723 INFO L471 AbstractCegarLoop]: Abstraction has 5034 states and 8034 transitions. [2024-11-02 12:32:32,723 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.25) internal successors, (45), 4 states have internal predecessors, (45), 4 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (12), 3 states have call predecessors, (12), 4 states have call successors, (12) [2024-11-02 12:32:32,723 INFO L276 IsEmpty]: Start isEmpty. Operand 5034 states and 8034 transitions. [2024-11-02 12:32:32,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2024-11-02 12:32:32,727 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:32:32,727 INFO L215 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, 1, 1, 1, 1, 1] [2024-11-02 12:32:32,749 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc3e116b-89de-4a06-b84e-9870f8a276b0/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-02 12:32:32,931 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc3e116b-89de-4a06-b84e-9870f8a276b0/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 12:32:32,931 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 12:32:32,932 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:32:32,932 INFO L85 PathProgramCache]: Analyzing trace with hash -1480209759, now seen corresponding path program 1 times [2024-11-02 12:32:32,932 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:32:32,932 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1992628398] [2024-11-02 12:32:32,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:32:32,932 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:32:32,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:32:33,643 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-02 12:32:33,644 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 12:32:33,645 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1992628398] [2024-11-02 12:32:33,645 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1992628398] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-02 12:32:33,645 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [164724119] [2024-11-02 12:32:33,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:32:33,645 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 12:32:33,646 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc3e116b-89de-4a06-b84e-9870f8a276b0/bin/utaipan-verify-DbMuA5NWw2/z3 [2024-11-02 12:32:33,648 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc3e116b-89de-4a06-b84e-9870f8a276b0/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-02 12:32:33,651 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc3e116b-89de-4a06-b84e-9870f8a276b0/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-02 12:32:34,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:32:34,091 INFO L255 TraceCheckSpWp]: Trace formula consists of 1738 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-02 12:32:34,095 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-02 12:32:34,132 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-02 12:32:34,132 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-02 12:32:34,132 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [164724119] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-02 12:32:34,133 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-02 12:32:34,133 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [10] total 12 [2024-11-02 12:32:34,133 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2108800825] [2024-11-02 12:32:34,133 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-02 12:32:34,134 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-02 12:32:34,134 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 12:32:34,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-02 12:32:34,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2024-11-02 12:32:34,135 INFO L87 Difference]: Start difference. First operand 5034 states and 8034 transitions. Second operand has 4 states, 4 states have (on average 12.25) internal successors, (49), 4 states have internal predecessors, (49), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2024-11-02 12:32:34,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 12:32:34,698 INFO L93 Difference]: Finished difference Result 8919 states and 14391 transitions. [2024-11-02 12:32:34,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-02 12:32:34,699 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.25) internal successors, (49), 4 states have internal predecessors, (49), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) Word has length 80 [2024-11-02 12:32:34,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 12:32:34,751 INFO L225 Difference]: With dead ends: 8919 [2024-11-02 12:32:34,751 INFO L226 Difference]: Without dead ends: 5064 [2024-11-02 12:32:34,786 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2024-11-02 12:32:34,787 INFO L432 NwaCegarLoop]: 568 mSDtfsCounter, 0 mSDsluCounter, 1133 mSDsCounter, 0 mSdLazyCounter, 119 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 1701 SdHoareTripleChecker+Invalid, 119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-02 12:32:34,788 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 1701 Invalid, 119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 119 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-02 12:32:34,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5064 states. [2024-11-02 12:32:35,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5064 to 5064. [2024-11-02 12:32:35,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5064 states, 3568 states have (on average 1.5103699551569507) internal successors, (5389), 3782 states have internal predecessors, (5389), 1163 states have call successors, (1163), 336 states have call predecessors, (1163), 332 states have return successors, (1512), 1051 states have call predecessors, (1512), 1152 states have call successors, (1512) [2024-11-02 12:32:35,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5064 states to 5064 states and 8064 transitions. [2024-11-02 12:32:35,183 INFO L78 Accepts]: Start accepts. Automaton has 5064 states and 8064 transitions. Word has length 80 [2024-11-02 12:32:35,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 12:32:35,184 INFO L471 AbstractCegarLoop]: Abstraction has 5064 states and 8064 transitions. [2024-11-02 12:32:35,184 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.25) internal successors, (49), 4 states have internal predecessors, (49), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2024-11-02 12:32:35,185 INFO L276 IsEmpty]: Start isEmpty. Operand 5064 states and 8064 transitions. [2024-11-02 12:32:35,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2024-11-02 12:32:35,189 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:32:35,189 INFO L215 NwaCegarLoop]: trace histogram [3, 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] [2024-11-02 12:32:35,214 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc3e116b-89de-4a06-b84e-9870f8a276b0/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-02 12:32:35,389 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc3e116b-89de-4a06-b84e-9870f8a276b0/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 12:32:35,390 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 12:32:35,390 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:32:35,390 INFO L85 PathProgramCache]: Analyzing trace with hash -52631268, now seen corresponding path program 1 times [2024-11-02 12:32:35,391 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:32:35,391 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1473403926] [2024-11-02 12:32:35,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:32:35,391 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:32:35,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:32:36,061 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-02 12:32:36,062 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 12:32:36,062 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1473403926] [2024-11-02 12:32:36,062 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1473403926] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-02 12:32:36,062 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1589598205] [2024-11-02 12:32:36,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:32:36,063 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 12:32:36,063 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc3e116b-89de-4a06-b84e-9870f8a276b0/bin/utaipan-verify-DbMuA5NWw2/z3 [2024-11-02 12:32:36,065 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc3e116b-89de-4a06-b84e-9870f8a276b0/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-02 12:32:36,074 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc3e116b-89de-4a06-b84e-9870f8a276b0/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-02 12:32:36,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:32:36,499 INFO L255 TraceCheckSpWp]: Trace formula consists of 1745 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-02 12:32:36,503 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-02 12:32:36,681 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-02 12:32:36,681 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-02 12:32:37,144 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-02 12:32:37,145 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1589598205] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-02 12:32:37,145 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-02 12:32:37,145 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [10, 7] total 18 [2024-11-02 12:32:37,145 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [644435329] [2024-11-02 12:32:37,145 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-02 12:32:37,146 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-02 12:32:37,146 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 12:32:37,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-02 12:32:37,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2024-11-02 12:32:37,147 INFO L87 Difference]: Start difference. First operand 5064 states and 8064 transitions. Second operand has 7 states, 7 states have (on average 7.0) internal successors, (49), 7 states have internal predecessors, (49), 6 states have call successors, (17), 4 states have call predecessors, (17), 4 states have return successors, (15), 6 states have call predecessors, (15), 6 states have call successors, (15) [2024-11-02 12:32:39,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 12:32:39,932 INFO L93 Difference]: Finished difference Result 10433 states and 16815 transitions. [2024-11-02 12:32:39,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-02 12:32:39,933 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.0) internal successors, (49), 7 states have internal predecessors, (49), 6 states have call successors, (17), 4 states have call predecessors, (17), 4 states have return successors, (15), 6 states have call predecessors, (15), 6 states have call successors, (15) Word has length 84 [2024-11-02 12:32:39,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 12:32:40,003 INFO L225 Difference]: With dead ends: 10433 [2024-11-02 12:32:40,003 INFO L226 Difference]: Without dead ends: 6566 [2024-11-02 12:32:40,026 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 158 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=78, Invalid=428, Unknown=0, NotChecked=0, Total=506 [2024-11-02 12:32:40,026 INFO L432 NwaCegarLoop]: 627 mSDtfsCounter, 1068 mSDsluCounter, 988 mSDsCounter, 0 mSdLazyCounter, 1385 mSolverCounterSat, 140 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1156 SdHoareTripleChecker+Valid, 1615 SdHoareTripleChecker+Invalid, 1525 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 140 IncrementalHoareTripleChecker+Valid, 1385 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2024-11-02 12:32:40,027 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1156 Valid, 1615 Invalid, 1525 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [140 Valid, 1385 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2024-11-02 12:32:40,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6566 states. [2024-11-02 12:32:40,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6566 to 5759. [2024-11-02 12:32:40,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5759 states, 4069 states have (on average 1.4898009338903908) internal successors, (6062), 4326 states have internal predecessors, (6062), 1296 states have call successors, (1296), 360 states have call predecessors, (1296), 393 states have return successors, (1822), 1172 states have call predecessors, (1822), 1285 states have call successors, (1822) [2024-11-02 12:32:40,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5759 states to 5759 states and 9180 transitions. [2024-11-02 12:32:40,646 INFO L78 Accepts]: Start accepts. Automaton has 5759 states and 9180 transitions. Word has length 84 [2024-11-02 12:32:40,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 12:32:40,647 INFO L471 AbstractCegarLoop]: Abstraction has 5759 states and 9180 transitions. [2024-11-02 12:32:40,648 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.0) internal successors, (49), 7 states have internal predecessors, (49), 6 states have call successors, (17), 4 states have call predecessors, (17), 4 states have return successors, (15), 6 states have call predecessors, (15), 6 states have call successors, (15) [2024-11-02 12:32:40,649 INFO L276 IsEmpty]: Start isEmpty. Operand 5759 states and 9180 transitions. [2024-11-02 12:32:40,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2024-11-02 12:32:40,653 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:32:40,653 INFO L215 NwaCegarLoop]: trace histogram [3, 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] [2024-11-02 12:32:40,678 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc3e116b-89de-4a06-b84e-9870f8a276b0/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-02 12:32:40,857 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc3e116b-89de-4a06-b84e-9870f8a276b0/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 12:32:40,859 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 12:32:40,860 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:32:40,860 INFO L85 PathProgramCache]: Analyzing trace with hash 1630194338, now seen corresponding path program 1 times [2024-11-02 12:32:40,860 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:32:40,860 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1616170136] [2024-11-02 12:32:40,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:32:40,860 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:32:40,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:32:41,666 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-02 12:32:41,666 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 12:32:41,667 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1616170136] [2024-11-02 12:32:41,667 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1616170136] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-02 12:32:41,667 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1604981762] [2024-11-02 12:32:41,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:32:41,667 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 12:32:41,667 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc3e116b-89de-4a06-b84e-9870f8a276b0/bin/utaipan-verify-DbMuA5NWw2/z3 [2024-11-02 12:32:41,669 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc3e116b-89de-4a06-b84e-9870f8a276b0/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-02 12:32:41,671 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc3e116b-89de-4a06-b84e-9870f8a276b0/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-02 12:32:42,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:32:42,120 INFO L255 TraceCheckSpWp]: Trace formula consists of 1746 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-11-02 12:32:42,124 INFO L278 TraceCheckSpWp]: Computing forward predicates...