./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/elevator_spec3_product09.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 4fc63b2a Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ef8d386-46e9-4386-976f-7dc64c985954/bin/utaipan-verify-DbMuA5NWw2/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ef8d386-46e9-4386-976f-7dc64c985954/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_1ef8d386-46e9-4386-976f-7dc64c985954/bin/utaipan-verify-DbMuA5NWw2/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ef8d386-46e9-4386-976f-7dc64c985954/bin/utaipan-verify-DbMuA5NWw2/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec3_product09.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ef8d386-46e9-4386-976f-7dc64c985954/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_1ef8d386-46e9-4386-976f-7dc64c985954/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 67b10dcf95f436cfd8f02a55d7d1d272656f1382a4eb6ab4ad3bba992e95e024 --- Real Ultimate output --- This is Ultimate 0.2.5-dev-4fc63b2 [2024-11-02 12:22:45,979 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-02 12:22:46,098 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ef8d386-46e9-4386-976f-7dc64c985954/bin/utaipan-verify-DbMuA5NWw2/config/svcomp-Reach-32bit-Taipan_Default.epf [2024-11-02 12:22:46,105 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-02 12:22:46,108 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-02 12:22:46,151 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-02 12:22:46,151 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-02 12:22:46,152 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-02 12:22:46,154 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-02 12:22:46,155 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-02 12:22:46,156 INFO L153 SettingsManager]: * User list type=DISABLED [2024-11-02 12:22:46,157 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2024-11-02 12:22:46,158 INFO L153 SettingsManager]: * Explicit value domain=true [2024-11-02 12:22:46,158 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2024-11-02 12:22:46,160 INFO L153 SettingsManager]: * Octagon Domain=false [2024-11-02 12:22:46,161 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2024-11-02 12:22:46,162 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2024-11-02 12:22:46,162 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2024-11-02 12:22:46,162 INFO L153 SettingsManager]: * Interval Domain=false [2024-11-02 12:22:46,163 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2024-11-02 12:22:46,167 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2024-11-02 12:22:46,168 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2024-11-02 12:22:46,169 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-02 12:22:46,169 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-02 12:22:46,170 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-02 12:22:46,170 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-02 12:22:46,170 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-02 12:22:46,171 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-02 12:22:46,171 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-02 12:22:46,171 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-02 12:22:46,172 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-02 12:22:46,172 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-02 12:22:46,173 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-02 12:22:46,173 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-02 12:22:46,173 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-02 12:22:46,174 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-02 12:22:46,174 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-02 12:22:46,175 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-02 12:22:46,175 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-02 12:22:46,176 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-02 12:22:46,176 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-02 12:22:46,176 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-02 12:22:46,177 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2024-11-02 12:22:46,177 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-02 12:22:46,178 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-02 12:22:46,178 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2024-11-02 12:22:46,179 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-02 12:22:46,179 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_1ef8d386-46e9-4386-976f-7dc64c985954/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ef8d386-46e9-4386-976f-7dc64c985954/bin/utaipan-verify-DbMuA5NWw2 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 67b10dcf95f436cfd8f02a55d7d1d272656f1382a4eb6ab4ad3bba992e95e024 [2024-11-02 12:22:46,556 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-02 12:22:46,582 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-02 12:22:46,585 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-02 12:22:46,587 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-02 12:22:46,588 INFO L274 PluginConnector]: CDTParser initialized [2024-11-02 12:22:46,590 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ef8d386-46e9-4386-976f-7dc64c985954/bin/utaipan-verify-DbMuA5NWw2/../../sv-benchmarks/c/product-lines/elevator_spec3_product09.cil.c Unable to find full path for "g++" [2024-11-02 12:22:48,658 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-02 12:22:49,143 INFO L384 CDTParser]: Found 1 translation units. [2024-11-02 12:22:49,143 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ef8d386-46e9-4386-976f-7dc64c985954/sv-benchmarks/c/product-lines/elevator_spec3_product09.cil.c [2024-11-02 12:22:49,172 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ef8d386-46e9-4386-976f-7dc64c985954/bin/utaipan-verify-DbMuA5NWw2/data/06462d9ef/ecf91e7b0777453a9e37ed25f15fa165/FLAG09ce03e89 [2024-11-02 12:22:49,193 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ef8d386-46e9-4386-976f-7dc64c985954/bin/utaipan-verify-DbMuA5NWw2/data/06462d9ef/ecf91e7b0777453a9e37ed25f15fa165 [2024-11-02 12:22:49,196 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-02 12:22:49,198 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-02 12:22:49,201 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-02 12:22:49,201 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-02 12:22:49,207 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-02 12:22:49,208 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 12:22:49" (1/1) ... [2024-11-02 12:22:49,209 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@66e49336 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:22:49, skipping insertion in model container [2024-11-02 12:22:49,211 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 12:22:49" (1/1) ... [2024-11-02 12:22:49,299 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-02 12:22:49,632 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_1ef8d386-46e9-4386-976f-7dc64c985954/sv-benchmarks/c/product-lines/elevator_spec3_product09.cil.c[21710,21723] [2024-11-02 12:22:49,959 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-02 12:22:49,974 INFO L200 MainTranslator]: Completed pre-run [2024-11-02 12:22:49,985 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"UnitTests.i","") [48] [2024-11-02 12:22:49,987 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"scenario.i","") [147] [2024-11-02 12:22:49,988 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Floor.i","") [165] [2024-11-02 12:22:49,988 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Person.i","") [832] [2024-11-02 12:22:49,988 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"wsllib_check.i","") [952] [2024-11-02 12:22:49,989 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Elevator.i","") [961] [2024-11-02 12:22:49,989 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"featureselect.i","") [2404] [2024-11-02 12:22:49,990 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Test.i","") [2442] [2024-11-02 12:22:49,990 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Specification3_spec.i","") [2790] [2024-11-02 12:22:49,990 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"libacc.i","") [2976] [2024-11-02 12:22:50,045 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_1ef8d386-46e9-4386-976f-7dc64c985954/sv-benchmarks/c/product-lines/elevator_spec3_product09.cil.c[21710,21723] [2024-11-02 12:22:50,158 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-02 12:22:50,196 INFO L204 MainTranslator]: Completed translation [2024-11-02 12:22:50,196 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:22:50 WrapperNode [2024-11-02 12:22:50,197 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-02 12:22:50,198 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-02 12:22:50,198 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-02 12:22:50,198 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-02 12:22:50,205 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:22:50" (1/1) ... [2024-11-02 12:22:50,234 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:22:50" (1/1) ... [2024-11-02 12:22:50,310 INFO L138 Inliner]: procedures = 87, calls = 336, calls flagged for inlining = 23, calls inlined = 20, statements flattened = 807 [2024-11-02 12:22:50,312 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-02 12:22:50,314 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-02 12:22:50,314 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-02 12:22:50,314 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-02 12:22:50,326 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:22:50" (1/1) ... [2024-11-02 12:22:50,326 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:22:50" (1/1) ... [2024-11-02 12:22:50,335 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:22:50" (1/1) ... [2024-11-02 12:22:50,336 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:22:50" (1/1) ... [2024-11-02 12:22:50,371 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:22:50" (1/1) ... [2024-11-02 12:22:50,394 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:22:50" (1/1) ... [2024-11-02 12:22:50,402 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:22:50" (1/1) ... [2024-11-02 12:22:50,414 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:22:50" (1/1) ... [2024-11-02 12:22:50,424 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-02 12:22:50,429 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-02 12:22:50,429 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-02 12:22:50,430 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-02 12:22:50,430 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:22:50" (1/1) ... [2024-11-02 12:22:50,438 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-02 12:22:50,450 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ef8d386-46e9-4386-976f-7dc64c985954/bin/utaipan-verify-DbMuA5NWw2/z3 [2024-11-02 12:22:50,466 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ef8d386-46e9-4386-976f-7dc64c985954/bin/utaipan-verify-DbMuA5NWw2/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2024-11-02 12:22:50,468 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ef8d386-46e9-4386-976f-7dc64c985954/bin/utaipan-verify-DbMuA5NWw2/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2024-11-02 12:22:50,498 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-02 12:22:50,498 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentHeading [2024-11-02 12:22:50,498 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentHeading [2024-11-02 12:22:50,499 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2024-11-02 12:22:50,499 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2024-11-02 12:22:50,499 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2024-11-02 12:22:50,499 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2024-11-02 12:22:50,499 INFO L130 BoogieDeclarations]: Found specification of procedure bobCall [2024-11-02 12:22:50,499 INFO L138 BoogieDeclarations]: Found implementation of procedure bobCall [2024-11-02 12:22:50,499 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2024-11-02 12:22:50,499 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2024-11-02 12:22:50,500 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2024-11-02 12:22:50,500 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2024-11-02 12:22:50,500 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2024-11-02 12:22:50,500 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2024-11-02 12:22:50,502 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2024-11-02 12:22:50,503 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2024-11-02 12:22:50,503 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2024-11-02 12:22:50,503 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2024-11-02 12:22:50,503 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2024-11-02 12:22:50,503 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2024-11-02 12:22:50,503 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2024-11-02 12:22:50,503 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2024-11-02 12:22:50,503 INFO L130 BoogieDeclarations]: Found specification of procedure initTopDown [2024-11-02 12:22:50,503 INFO L138 BoogieDeclarations]: Found implementation of procedure initTopDown [2024-11-02 12:22:50,504 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2024-11-02 12:22:50,504 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2024-11-02 12:22:50,504 INFO L130 BoogieDeclarations]: Found specification of procedure initFloors [2024-11-02 12:22:50,504 INFO L138 BoogieDeclarations]: Found implementation of procedure initFloors [2024-11-02 12:22:50,504 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2024-11-02 12:22:50,504 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2024-11-02 12:22:50,504 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2024-11-02 12:22:50,504 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2024-11-02 12:22:50,504 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2024-11-02 12:22:50,504 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2024-11-02 12:22:50,505 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2024-11-02 12:22:50,505 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2024-11-02 12:22:50,505 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2024-11-02 12:22:50,505 INFO L130 BoogieDeclarations]: Found specification of procedure buttonForFloorIsPressed [2024-11-02 12:22:50,505 INFO L138 BoogieDeclarations]: Found implementation of procedure buttonForFloorIsPressed [2024-11-02 12:22:50,505 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2024-11-02 12:22:50,505 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2024-11-02 12:22:50,505 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2024-11-02 12:22:50,509 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2024-11-02 12:22:50,510 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2024-11-02 12:22:50,510 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2024-11-02 12:22:50,510 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-02 12:22:50,510 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-02 12:22:50,510 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2024-11-02 12:22:50,510 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2024-11-02 12:22:50,655 INFO L238 CfgBuilder]: Building ICFG [2024-11-02 12:22:50,657 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-02 12:22:52,098 INFO L? ?]: Removed 429 outVars from TransFormulas that were not future-live. [2024-11-02 12:22:52,099 INFO L287 CfgBuilder]: Performing block encoding [2024-11-02 12:22:53,064 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-02 12:22:53,064 INFO L316 CfgBuilder]: Removed 1 assume(true) statements. [2024-11-02 12:22:53,065 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 12:22:53 BoogieIcfgContainer [2024-11-02 12:22:53,065 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-02 12:22:53,068 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-02 12:22:53,068 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-02 12:22:53,071 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-02 12:22:53,071 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.11 12:22:49" (1/3) ... [2024-11-02 12:22:53,072 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@507b4a89 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 12:22:53, skipping insertion in model container [2024-11-02 12:22:53,072 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:22:50" (2/3) ... [2024-11-02 12:22:53,073 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@507b4a89 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 12:22:53, skipping insertion in model container [2024-11-02 12:22:53,073 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 12:22:53" (3/3) ... [2024-11-02 12:22:53,074 INFO L112 eAbstractionObserver]: Analyzing ICFG elevator_spec3_product09.cil.c [2024-11-02 12:22:53,093 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-02 12:22:53,093 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-11-02 12:22:53,189 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-02 12:22:53,197 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;@5f4861e, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-02 12:22:53,197 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-02 12:22:53,205 INFO L276 IsEmpty]: Start isEmpty. Operand has 377 states, 254 states have (on average 1.5984251968503937) internal successors, (406), 272 states have internal predecessors, (406), 98 states have call successors, (98), 23 states have call predecessors, (98), 23 states have return successors, (98), 95 states have call predecessors, (98), 98 states have call successors, (98) [2024-11-02 12:22:53,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2024-11-02 12:22:53,227 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:22:53,228 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] [2024-11-02 12:22:53,229 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 12:22:53,236 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:22:53,237 INFO L85 PathProgramCache]: Analyzing trace with hash 1665794326, now seen corresponding path program 1 times [2024-11-02 12:22:53,251 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:22:53,251 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [407400987] [2024-11-02 12:22:53,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:22:53,253 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:22:53,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:22:54,157 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 12:22:54,158 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 12:22:54,158 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [407400987] [2024-11-02 12:22:54,159 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [407400987] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-02 12:22:54,159 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-02 12:22:54,159 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-02 12:22:54,162 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560908577] [2024-11-02 12:22:54,163 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-02 12:22:54,168 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-02 12:22:54,169 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 12:22:54,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-02 12:22:54,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-02 12:22:54,211 INFO L87 Difference]: Start difference. First operand has 377 states, 254 states have (on average 1.5984251968503937) internal successors, (406), 272 states have internal predecessors, (406), 98 states have call successors, (98), 23 states have call predecessors, (98), 23 states have return successors, (98), 95 states have call predecessors, (98), 98 states have call successors, (98) Second operand has 4 states, 4 states have (on average 10.0) internal successors, (40), 4 states have internal predecessors, (40), 4 states have call successors, (12), 3 states have call predecessors, (12), 2 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2024-11-02 12:22:55,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 12:22:55,022 INFO L93 Difference]: Finished difference Result 1057 states and 1712 transitions. [2024-11-02 12:22:55,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-02 12:22:55,026 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.0) internal successors, (40), 4 states have internal predecessors, (40), 4 states have call successors, (12), 3 states have call predecessors, (12), 2 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) Word has length 63 [2024-11-02 12:22:55,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 12:22:55,055 INFO L225 Difference]: With dead ends: 1057 [2024-11-02 12:22:55,055 INFO L226 Difference]: Without dead ends: 682 [2024-11-02 12:22:55,067 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 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 12:22:55,073 INFO L432 NwaCegarLoop]: 599 mSDtfsCounter, 486 mSDsluCounter, 1086 mSDsCounter, 0 mSdLazyCounter, 289 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 486 SdHoareTripleChecker+Valid, 1685 SdHoareTripleChecker+Invalid, 327 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 289 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-02 12:22:55,075 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [486 Valid, 1685 Invalid, 327 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 289 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-11-02 12:22:55,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 682 states. [2024-11-02 12:22:55,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 682 to 675. [2024-11-02 12:22:55,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 675 states, 457 states have (on average 1.5229759299781183) internal successors, (696), 487 states have internal predecessors, (696), 178 states have call successors, (178), 43 states have call predecessors, (178), 39 states have return successors, (179), 169 states have call predecessors, (179), 174 states have call successors, (179) [2024-11-02 12:22:55,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 675 states to 675 states and 1053 transitions. [2024-11-02 12:22:55,227 INFO L78 Accepts]: Start accepts. Automaton has 675 states and 1053 transitions. Word has length 63 [2024-11-02 12:22:55,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 12:22:55,228 INFO L471 AbstractCegarLoop]: Abstraction has 675 states and 1053 transitions. [2024-11-02 12:22:55,229 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.0) internal successors, (40), 4 states have internal predecessors, (40), 4 states have call successors, (12), 3 states have call predecessors, (12), 2 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2024-11-02 12:22:55,229 INFO L276 IsEmpty]: Start isEmpty. Operand 675 states and 1053 transitions. [2024-11-02 12:22:55,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2024-11-02 12:22:55,233 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:22:55,234 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] [2024-11-02 12:22:55,234 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-02 12:22:55,234 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 12:22:55,235 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:22:55,235 INFO L85 PathProgramCache]: Analyzing trace with hash 1607558271, now seen corresponding path program 1 times [2024-11-02 12:22:55,235 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:22:55,236 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1488976278] [2024-11-02 12:22:55,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:22:55,236 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:22:55,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:22:55,660 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 12:22:55,661 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 12:22:55,662 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1488976278] [2024-11-02 12:22:55,662 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1488976278] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-02 12:22:55,663 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-02 12:22:55,663 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-02 12:22:55,664 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [108591314] [2024-11-02 12:22:55,664 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-02 12:22:55,666 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-02 12:22:55,667 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 12:22:55,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-02 12:22:55,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-02 12:22:55,670 INFO L87 Difference]: Start difference. First operand 675 states and 1053 transitions. Second operand has 4 states, 4 states have (on average 10.25) internal successors, (41), 4 states have internal predecessors, (41), 2 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2024-11-02 12:22:55,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 12:22:55,894 INFO L93 Difference]: Finished difference Result 1112 states and 1748 transitions. [2024-11-02 12:22:55,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-02 12:22:55,895 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.25) internal successors, (41), 4 states have internal predecessors, (41), 2 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) Word has length 68 [2024-11-02 12:22:55,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 12:22:55,905 INFO L225 Difference]: With dead ends: 1112 [2024-11-02 12:22:55,905 INFO L226 Difference]: Without dead ends: 679 [2024-11-02 12:22:55,911 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-02 12:22:55,912 INFO L432 NwaCegarLoop]: 555 mSDtfsCounter, 0 mSDsluCounter, 1108 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 1663 SdHoareTripleChecker+Invalid, 106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-02 12:22:55,913 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 1663 Invalid, 106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-02 12:22:55,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 679 states. [2024-11-02 12:22:55,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 679 to 679. [2024-11-02 12:22:55,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 679 states, 461 states have (on average 1.5184381778741864) internal successors, (700), 491 states have internal predecessors, (700), 178 states have call successors, (178), 43 states have call predecessors, (178), 39 states have return successors, (179), 169 states have call predecessors, (179), 174 states have call successors, (179) [2024-11-02 12:22:55,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 679 states to 679 states and 1057 transitions. [2024-11-02 12:22:55,990 INFO L78 Accepts]: Start accepts. Automaton has 679 states and 1057 transitions. Word has length 68 [2024-11-02 12:22:55,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 12:22:55,991 INFO L471 AbstractCegarLoop]: Abstraction has 679 states and 1057 transitions. [2024-11-02 12:22:55,992 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.25) internal successors, (41), 4 states have internal predecessors, (41), 2 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2024-11-02 12:22:55,992 INFO L276 IsEmpty]: Start isEmpty. Operand 679 states and 1057 transitions. [2024-11-02 12:22:55,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2024-11-02 12:22:55,997 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:22:55,997 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] [2024-11-02 12:22:55,998 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-02 12:22:55,998 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 12:22:55,999 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:22:56,000 INFO L85 PathProgramCache]: Analyzing trace with hash 1594280789, now seen corresponding path program 1 times [2024-11-02 12:22:56,000 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:22:56,000 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [195022054] [2024-11-02 12:22:56,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:22:56,001 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:22:56,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:22:56,488 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-02 12:22:56,488 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 12:22:56,489 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [195022054] [2024-11-02 12:22:56,489 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [195022054] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-02 12:22:56,489 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2017024630] [2024-11-02 12:22:56,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:22:56,490 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 12:22:56,490 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ef8d386-46e9-4386-976f-7dc64c985954/bin/utaipan-verify-DbMuA5NWw2/z3 [2024-11-02 12:22:56,493 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ef8d386-46e9-4386-976f-7dc64c985954/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-02 12:22:56,494 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ef8d386-46e9-4386-976f-7dc64c985954/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-02 12:22:56,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:22:56,906 INFO L255 TraceCheckSpWp]: Trace formula consists of 1502 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-02 12:22:56,916 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-02 12:22:57,114 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 12:22:57,115 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-02 12:22:57,115 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2017024630] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-02 12:22:57,115 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-02 12:22:57,115 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 9 [2024-11-02 12:22:57,115 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [912828544] [2024-11-02 12:22:57,116 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-02 12:22:57,116 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-02 12:22:57,116 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 12:22:57,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-02 12:22:57,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-11-02 12:22:57,117 INFO L87 Difference]: Start difference. First operand 679 states and 1057 transitions. Second operand has 5 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 4 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (13), 3 states have call predecessors, (13), 4 states have call successors, (13) [2024-11-02 12:22:57,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 12:22:57,850 INFO L93 Difference]: Finished difference Result 1121 states and 1749 transitions. [2024-11-02 12:22:57,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-02 12:22:57,851 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 4 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (13), 3 states have call predecessors, (13), 4 states have call successors, (13) Word has length 72 [2024-11-02 12:22:57,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 12:22:57,857 INFO L225 Difference]: With dead ends: 1121 [2024-11-02 12:22:57,857 INFO L226 Difference]: Without dead ends: 687 [2024-11-02 12:22:57,860 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-11-02 12:22:57,861 INFO L432 NwaCegarLoop]: 624 mSDtfsCounter, 425 mSDsluCounter, 1075 mSDsCounter, 0 mSdLazyCounter, 467 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 426 SdHoareTripleChecker+Valid, 1699 SdHoareTripleChecker+Invalid, 467 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 467 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-02 12:22:57,864 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [426 Valid, 1699 Invalid, 467 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 467 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-11-02 12:22:57,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 687 states. [2024-11-02 12:22:57,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 687 to 683. [2024-11-02 12:22:57,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 683 states, 463 states have (on average 1.5161987041036717) internal successors, (702), 494 states have internal predecessors, (702), 178 states have call successors, (178), 44 states have call predecessors, (178), 41 states have return successors, (180), 169 states have call predecessors, (180), 174 states have call successors, (180) [2024-11-02 12:22:57,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 683 states to 683 states and 1060 transitions. [2024-11-02 12:22:57,916 INFO L78 Accepts]: Start accepts. Automaton has 683 states and 1060 transitions. Word has length 72 [2024-11-02 12:22:57,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 12:22:57,917 INFO L471 AbstractCegarLoop]: Abstraction has 683 states and 1060 transitions. [2024-11-02 12:22:57,917 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 4 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (13), 3 states have call predecessors, (13), 4 states have call successors, (13) [2024-11-02 12:22:57,917 INFO L276 IsEmpty]: Start isEmpty. Operand 683 states and 1060 transitions. [2024-11-02 12:22:57,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2024-11-02 12:22:57,919 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:22:57,920 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] [2024-11-02 12:22:57,944 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ef8d386-46e9-4386-976f-7dc64c985954/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-11-02 12:22:58,120 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ef8d386-46e9-4386-976f-7dc64c985954/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 12:22:58,121 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 12:22:58,122 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:22:58,122 INFO L85 PathProgramCache]: Analyzing trace with hash 62701401, now seen corresponding path program 1 times [2024-11-02 12:22:58,123 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:22:58,123 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1512859412] [2024-11-02 12:22:58,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:22:58,123 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:22:58,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:22:58,563 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-02 12:22:58,563 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 12:22:58,564 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1512859412] [2024-11-02 12:22:58,564 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1512859412] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-02 12:22:58,564 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1624330999] [2024-11-02 12:22:58,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:22:58,565 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 12:22:58,565 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ef8d386-46e9-4386-976f-7dc64c985954/bin/utaipan-verify-DbMuA5NWw2/z3 [2024-11-02 12:22:58,569 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ef8d386-46e9-4386-976f-7dc64c985954/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-02 12:22:58,572 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ef8d386-46e9-4386-976f-7dc64c985954/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-02 12:22:59,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:22:59,056 INFO L255 TraceCheckSpWp]: Trace formula consists of 1495 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-02 12:22:59,061 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-02 12:22:59,108 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 12:22:59,109 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-02 12:22:59,109 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1624330999] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-02 12:22:59,109 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-02 12:22:59,109 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 8 [2024-11-02 12:22:59,110 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [287564607] [2024-11-02 12:22:59,110 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-02 12:22:59,111 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-02 12:22:59,111 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 12:22:59,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-02 12:22:59,111 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2024-11-02 12:22:59,112 INFO L87 Difference]: Start difference. First operand 683 states and 1060 transitions. Second operand has 4 states, 4 states have (on average 11.5) internal successors, (46), 4 states have internal predecessors, (46), 2 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2024-11-02 12:22:59,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 12:22:59,412 INFO L93 Difference]: Finished difference Result 1228 states and 1936 transitions. [2024-11-02 12:22:59,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-02 12:22:59,412 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.5) internal successors, (46), 4 states have internal predecessors, (46), 2 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) Word has length 73 [2024-11-02 12:22:59,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 12:22:59,418 INFO L225 Difference]: With dead ends: 1228 [2024-11-02 12:22:59,418 INFO L226 Difference]: Without dead ends: 687 [2024-11-02 12:22:59,422 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-11-02 12:22:59,424 INFO L432 NwaCegarLoop]: 593 mSDtfsCounter, 258 mSDsluCounter, 959 mSDsCounter, 0 mSdLazyCounter, 170 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 269 SdHoareTripleChecker+Valid, 1552 SdHoareTripleChecker+Invalid, 191 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 170 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-02 12:22:59,424 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [269 Valid, 1552 Invalid, 191 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 170 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-02 12:22:59,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 687 states. [2024-11-02 12:22:59,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 687 to 683. [2024-11-02 12:22:59,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 683 states, 463 states have (on average 1.4859611231101513) internal successors, (688), 494 states have internal predecessors, (688), 178 states have call successors, (178), 44 states have call predecessors, (178), 41 states have return successors, (180), 169 states have call predecessors, (180), 174 states have call successors, (180) [2024-11-02 12:22:59,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 683 states to 683 states and 1046 transitions. [2024-11-02 12:22:59,472 INFO L78 Accepts]: Start accepts. Automaton has 683 states and 1046 transitions. Word has length 73 [2024-11-02 12:22:59,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 12:22:59,472 INFO L471 AbstractCegarLoop]: Abstraction has 683 states and 1046 transitions. [2024-11-02 12:22:59,474 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.5) internal successors, (46), 4 states have internal predecessors, (46), 2 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2024-11-02 12:22:59,477 INFO L276 IsEmpty]: Start isEmpty. Operand 683 states and 1046 transitions. [2024-11-02 12:22:59,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2024-11-02 12:22:59,478 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:22:59,478 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-02 12:22:59,502 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ef8d386-46e9-4386-976f-7dc64c985954/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-02 12:22:59,679 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ef8d386-46e9-4386-976f-7dc64c985954/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 12:22:59,679 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 12:22:59,679 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:22:59,679 INFO L85 PathProgramCache]: Analyzing trace with hash -1253365990, now seen corresponding path program 1 times [2024-11-02 12:22:59,680 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:22:59,680 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [69186734] [2024-11-02 12:22:59,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:22:59,680 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:22:59,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:23:00,060 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-02 12:23:00,061 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 12:23:00,061 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [69186734] [2024-11-02 12:23:00,061 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [69186734] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-02 12:23:00,062 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1113060810] [2024-11-02 12:23:00,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:23:00,062 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 12:23:00,062 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ef8d386-46e9-4386-976f-7dc64c985954/bin/utaipan-verify-DbMuA5NWw2/z3 [2024-11-02 12:23:00,064 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ef8d386-46e9-4386-976f-7dc64c985954/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-02 12:23:00,066 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ef8d386-46e9-4386-976f-7dc64c985954/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-02 12:23:00,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:23:00,461 INFO L255 TraceCheckSpWp]: Trace formula consists of 1503 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-11-02 12:23:00,466 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-02 12:23:00,744 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-02 12:23:00,744 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-02 12:23:01,079 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-02 12:23:01,079 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1113060810] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-02 12:23:01,079 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-02 12:23:01,079 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [6, 9] total 16 [2024-11-02 12:23:01,080 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1055428936] [2024-11-02 12:23:01,080 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-02 12:23:01,080 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-02 12:23:01,080 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 12:23:01,081 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-02 12:23:01,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2024-11-02 12:23:01,081 INFO L87 Difference]: Start difference. First operand 683 states and 1046 transitions. Second operand has 9 states, 8 states have (on average 5.625) internal successors, (45), 8 states have internal predecessors, (45), 4 states have call successors, (15), 4 states have call predecessors, (15), 4 states have return successors, (13), 4 states have call predecessors, (13), 3 states have call successors, (13) [2024-11-02 12:23:05,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 12:23:05,070 INFO L93 Difference]: Finished difference Result 1566 states and 2480 transitions. [2024-11-02 12:23:05,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-11-02 12:23:05,071 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 5.625) internal successors, (45), 8 states have internal predecessors, (45), 4 states have call successors, (15), 4 states have call predecessors, (15), 4 states have return successors, (13), 4 states have call predecessors, (13), 3 states have call successors, (13) Word has length 75 [2024-11-02 12:23:05,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 12:23:05,079 INFO L225 Difference]: With dead ends: 1566 [2024-11-02 12:23:05,080 INFO L226 Difference]: Without dead ends: 1206 [2024-11-02 12:23:05,083 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=139, Invalid=673, Unknown=0, NotChecked=0, Total=812 [2024-11-02 12:23:05,084 INFO L432 NwaCegarLoop]: 593 mSDtfsCounter, 2363 mSDsluCounter, 1983 mSDsCounter, 0 mSdLazyCounter, 1787 mSolverCounterSat, 1086 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2440 SdHoareTripleChecker+Valid, 2576 SdHoareTripleChecker+Invalid, 2873 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1086 IncrementalHoareTripleChecker+Valid, 1787 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2024-11-02 12:23:05,084 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2440 Valid, 2576 Invalid, 2873 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1086 Valid, 1787 Invalid, 0 Unknown, 0 Unchecked, 3.5s Time] [2024-11-02 12:23:05,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1206 states. [2024-11-02 12:23:05,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1206 to 1183. [2024-11-02 12:23:05,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1183 states, 822 states have (on average 1.5036496350364963) internal successors, (1236), 869 states have internal predecessors, (1236), 288 states have call successors, (288), 73 states have call predecessors, (288), 72 states have return successors, (325), 276 states have call predecessors, (325), 283 states have call successors, (325) [2024-11-02 12:23:05,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1183 states to 1183 states and 1849 transitions. [2024-11-02 12:23:05,177 INFO L78 Accepts]: Start accepts. Automaton has 1183 states and 1849 transitions. Word has length 75 [2024-11-02 12:23:05,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 12:23:05,177 INFO L471 AbstractCegarLoop]: Abstraction has 1183 states and 1849 transitions. [2024-11-02 12:23:05,178 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 5.625) internal successors, (45), 8 states have internal predecessors, (45), 4 states have call successors, (15), 4 states have call predecessors, (15), 4 states have return successors, (13), 4 states have call predecessors, (13), 3 states have call successors, (13) [2024-11-02 12:23:05,178 INFO L276 IsEmpty]: Start isEmpty. Operand 1183 states and 1849 transitions. [2024-11-02 12:23:05,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2024-11-02 12:23:05,180 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:23:05,180 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-02 12:23:05,203 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ef8d386-46e9-4386-976f-7dc64c985954/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-02 12:23:05,380 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ef8d386-46e9-4386-976f-7dc64c985954/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 12:23:05,381 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 12:23:05,381 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:23:05,381 INFO L85 PathProgramCache]: Analyzing trace with hash 503907876, now seen corresponding path program 1 times [2024-11-02 12:23:05,381 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:23:05,381 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1654252605] [2024-11-02 12:23:05,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:23:05,382 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:23:05,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:23:05,863 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-02 12:23:05,863 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 12:23:05,863 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1654252605] [2024-11-02 12:23:05,863 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1654252605] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-02 12:23:05,864 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1849678352] [2024-11-02 12:23:05,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:23:05,864 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 12:23:05,864 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ef8d386-46e9-4386-976f-7dc64c985954/bin/utaipan-verify-DbMuA5NWw2/z3 [2024-11-02 12:23:05,866 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ef8d386-46e9-4386-976f-7dc64c985954/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-02 12:23:05,868 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ef8d386-46e9-4386-976f-7dc64c985954/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-02 12:23:06,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:23:06,291 INFO L255 TraceCheckSpWp]: Trace formula consists of 1504 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-02 12:23:06,296 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-02 12:23:06,381 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-02 12:23:06,382 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-02 12:23:06,382 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1849678352] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-02 12:23:06,382 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-02 12:23:06,382 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2024-11-02 12:23:06,382 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [226676729] [2024-11-02 12:23:06,382 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-02 12:23:06,383 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-02 12:23:06,383 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 12:23:06,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-02 12:23:06,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2024-11-02 12:23:06,384 INFO L87 Difference]: Start difference. First operand 1183 states and 1849 transitions. Second operand has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 3 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2024-11-02 12:23:06,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 12:23:06,767 INFO L93 Difference]: Finished difference Result 3386 states and 5439 transitions. [2024-11-02 12:23:06,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-02 12:23:06,768 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 3 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) Word has length 76 [2024-11-02 12:23:06,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 12:23:06,790 INFO L225 Difference]: With dead ends: 3386 [2024-11-02 12:23:06,790 INFO L226 Difference]: Without dead ends: 2215 [2024-11-02 12:23:06,801 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 77 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 12:23:06,803 INFO L432 NwaCegarLoop]: 777 mSDtfsCounter, 459 mSDsluCounter, 529 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 459 SdHoareTripleChecker+Valid, 1306 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-02 12:23:06,803 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [459 Valid, 1306 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 90 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-02 12:23:06,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2215 states. [2024-11-02 12:23:06,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2215 to 2159. [2024-11-02 12:23:06,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2159 states, 1510 states have (on average 1.5119205298013245) internal successors, (2283), 1605 states have internal predecessors, (2283), 512 states have call successors, (512), 131 states have call predecessors, (512), 136 states have return successors, (604), 494 states have call predecessors, (604), 507 states have call successors, (604) [2024-11-02 12:23:06,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2159 states to 2159 states and 3399 transitions. [2024-11-02 12:23:07,002 INFO L78 Accepts]: Start accepts. Automaton has 2159 states and 3399 transitions. Word has length 76 [2024-11-02 12:23:07,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 12:23:07,003 INFO L471 AbstractCegarLoop]: Abstraction has 2159 states and 3399 transitions. [2024-11-02 12:23:07,004 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 3 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2024-11-02 12:23:07,004 INFO L276 IsEmpty]: Start isEmpty. Operand 2159 states and 3399 transitions. [2024-11-02 12:23:07,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2024-11-02 12:23:07,008 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:23:07,008 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] [2024-11-02 12:23:07,039 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ef8d386-46e9-4386-976f-7dc64c985954/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-02 12:23:07,212 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ef8d386-46e9-4386-976f-7dc64c985954/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 12:23:07,212 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 12:23:07,214 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:23:07,214 INFO L85 PathProgramCache]: Analyzing trace with hash 1073560945, now seen corresponding path program 1 times [2024-11-02 12:23:07,214 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:23:07,215 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1799754176] [2024-11-02 12:23:07,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:23:07,215 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:23:07,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:23:07,595 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-02 12:23:07,595 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 12:23:07,595 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1799754176] [2024-11-02 12:23:07,595 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1799754176] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-02 12:23:07,595 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [479096541] [2024-11-02 12:23:07,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:23:07,596 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 12:23:07,596 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ef8d386-46e9-4386-976f-7dc64c985954/bin/utaipan-verify-DbMuA5NWw2/z3 [2024-11-02 12:23:07,598 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ef8d386-46e9-4386-976f-7dc64c985954/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-02 12:23:07,599 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ef8d386-46e9-4386-976f-7dc64c985954/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-02 12:23:08,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:23:08,009 INFO L255 TraceCheckSpWp]: Trace formula consists of 1495 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-02 12:23:08,015 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-02 12:23:08,122 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 12:23:08,123 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-02 12:23:08,123 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [479096541] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-02 12:23:08,123 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-02 12:23:08,123 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2024-11-02 12:23:08,124 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1305152457] [2024-11-02 12:23:08,124 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-02 12:23:08,124 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-02 12:23:08,125 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 12:23:08,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-02 12:23:08,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2024-11-02 12:23:08,126 INFO L87 Difference]: Start difference. First operand 2159 states and 3399 transitions. Second operand has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 3 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2024-11-02 12:23:08,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 12:23:08,509 INFO L93 Difference]: Finished difference Result 5054 states and 8065 transitions. [2024-11-02 12:23:08,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-02 12:23:08,510 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 3 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) Word has length 75 [2024-11-02 12:23:08,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 12:23:08,535 INFO L225 Difference]: With dead ends: 5054 [2024-11-02 12:23:08,535 INFO L226 Difference]: Without dead ends: 2907 [2024-11-02 12:23:08,551 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2024-11-02 12:23:08,552 INFO L432 NwaCegarLoop]: 656 mSDtfsCounter, 519 mSDsluCounter, 458 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 519 SdHoareTripleChecker+Valid, 1114 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-02 12:23:08,552 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [519 Valid, 1114 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-02 12:23:08,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2907 states. [2024-11-02 12:23:08,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2907 to 2863. [2024-11-02 12:23:08,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2863 states, 2015 states have (on average 1.5205955334987593) internal successors, (3064), 2142 states have internal predecessors, (3064), 667 states have call successors, (667), 170 states have call predecessors, (667), 180 states have return successors, (795), 646 states have call predecessors, (795), 662 states have call successors, (795) [2024-11-02 12:23:08,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2863 states to 2863 states and 4526 transitions. [2024-11-02 12:23:08,819 INFO L78 Accepts]: Start accepts. Automaton has 2863 states and 4526 transitions. Word has length 75 [2024-11-02 12:23:08,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 12:23:08,820 INFO L471 AbstractCegarLoop]: Abstraction has 2863 states and 4526 transitions. [2024-11-02 12:23:08,820 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 3 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2024-11-02 12:23:08,820 INFO L276 IsEmpty]: Start isEmpty. Operand 2863 states and 4526 transitions. [2024-11-02 12:23:08,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2024-11-02 12:23:08,823 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:23:08,824 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-02 12:23:08,849 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ef8d386-46e9-4386-976f-7dc64c985954/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-02 12:23:09,024 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ef8d386-46e9-4386-976f-7dc64c985954/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 12:23:09,028 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 12:23:09,028 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:23:09,029 INFO L85 PathProgramCache]: Analyzing trace with hash 1103674593, now seen corresponding path program 1 times [2024-11-02 12:23:09,029 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:23:09,029 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [333664319] [2024-11-02 12:23:09,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:23:09,029 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:23:09,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:23:09,513 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-02 12:23:09,513 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 12:23:09,513 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [333664319] [2024-11-02 12:23:09,513 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [333664319] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-02 12:23:09,513 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2141190477] [2024-11-02 12:23:09,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:23:09,514 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 12:23:09,514 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ef8d386-46e9-4386-976f-7dc64c985954/bin/utaipan-verify-DbMuA5NWw2/z3 [2024-11-02 12:23:09,516 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ef8d386-46e9-4386-976f-7dc64c985954/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-02 12:23:09,518 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ef8d386-46e9-4386-976f-7dc64c985954/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-02 12:23:10,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:23:10,025 INFO L255 TraceCheckSpWp]: Trace formula consists of 1514 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-02 12:23:10,032 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-02 12:23:10,219 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-02 12:23:10,219 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-02 12:23:10,219 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2141190477] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-02 12:23:10,220 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-02 12:23:10,220 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 9 [2024-11-02 12:23:10,220 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [543128829] [2024-11-02 12:23:10,220 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-02 12:23:10,221 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-02 12:23:10,221 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 12:23:10,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-02 12:23:10,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2024-11-02 12:23:10,223 INFO L87 Difference]: Start difference. First operand 2863 states and 4526 transitions. Second operand has 5 states, 5 states have (on average 9.4) internal successors, (47), 5 states have internal predecessors, (47), 4 states have call successors, (16), 3 states have call predecessors, (16), 4 states have return successors, (14), 3 states have call predecessors, (14), 4 states have call successors, (14) [2024-11-02 12:23:11,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 12:23:11,203 INFO L93 Difference]: Finished difference Result 5145 states and 8164 transitions. [2024-11-02 12:23:11,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-02 12:23:11,204 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.4) internal successors, (47), 5 states have internal predecessors, (47), 4 states have call successors, (16), 3 states have call predecessors, (16), 4 states have return successors, (14), 3 states have call predecessors, (14), 4 states have call successors, (14) Word has length 79 [2024-11-02 12:23:11,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 12:23:11,232 INFO L225 Difference]: With dead ends: 5145 [2024-11-02 12:23:11,232 INFO L226 Difference]: Without dead ends: 2871 [2024-11-02 12:23:11,249 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-11-02 12:23:11,250 INFO L432 NwaCegarLoop]: 653 mSDtfsCounter, 396 mSDsluCounter, 1670 mSDsCounter, 0 mSdLazyCounter, 355 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 396 SdHoareTripleChecker+Valid, 2323 SdHoareTripleChecker+Invalid, 361 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 355 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-11-02 12:23:11,251 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [396 Valid, 2323 Invalid, 361 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 355 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-11-02 12:23:11,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2871 states. [2024-11-02 12:23:11,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2871 to 2863. [2024-11-02 12:23:11,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2863 states, 2015 states have (on average 1.5205955334987593) internal successors, (3064), 2142 states have internal predecessors, (3064), 667 states have call successors, (667), 170 states have call predecessors, (667), 180 states have return successors, (791), 646 states have call predecessors, (791), 662 states have call successors, (791) [2024-11-02 12:23:11,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2863 states to 2863 states and 4522 transitions. [2024-11-02 12:23:11,550 INFO L78 Accepts]: Start accepts. Automaton has 2863 states and 4522 transitions. Word has length 79 [2024-11-02 12:23:11,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 12:23:11,551 INFO L471 AbstractCegarLoop]: Abstraction has 2863 states and 4522 transitions. [2024-11-02 12:23:11,552 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.4) internal successors, (47), 5 states have internal predecessors, (47), 4 states have call successors, (16), 3 states have call predecessors, (16), 4 states have return successors, (14), 3 states have call predecessors, (14), 4 states have call successors, (14) [2024-11-02 12:23:11,552 INFO L276 IsEmpty]: Start isEmpty. Operand 2863 states and 4522 transitions. [2024-11-02 12:23:11,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2024-11-02 12:23:11,556 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:23:11,556 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-02 12:23:11,584 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ef8d386-46e9-4386-976f-7dc64c985954/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-02 12:23:11,757 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ef8d386-46e9-4386-976f-7dc64c985954/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 12:23:11,757 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 12:23:11,757 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:23:11,757 INFO L85 PathProgramCache]: Analyzing trace with hash 1904341993, now seen corresponding path program 1 times [2024-11-02 12:23:11,758 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:23:11,758 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1208880647] [2024-11-02 12:23:11,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:23:11,758 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:23:11,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:23:12,134 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2024-11-02 12:23:12,134 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 12:23:12,134 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1208880647] [2024-11-02 12:23:12,135 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1208880647] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-02 12:23:12,136 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1369501411] [2024-11-02 12:23:12,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:23:12,136 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 12:23:12,137 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ef8d386-46e9-4386-976f-7dc64c985954/bin/utaipan-verify-DbMuA5NWw2/z3 [2024-11-02 12:23:12,139 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ef8d386-46e9-4386-976f-7dc64c985954/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-02 12:23:12,140 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ef8d386-46e9-4386-976f-7dc64c985954/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-02 12:23:12,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:23:12,622 INFO L255 TraceCheckSpWp]: Trace formula consists of 1578 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-02 12:23:12,626 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-02 12:23:12,681 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-02 12:23:12,682 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-02 12:23:12,683 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1369501411] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-02 12:23:12,683 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-02 12:23:12,683 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 9 [2024-11-02 12:23:12,686 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [573687131] [2024-11-02 12:23:12,687 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-02 12:23:12,687 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-02 12:23:12,687 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 12:23:12,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-02 12:23:12,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2024-11-02 12:23:12,689 INFO L87 Difference]: Start difference. First operand 2863 states and 4522 transitions. Second operand has 5 states, 5 states have (on average 11.4) internal successors, (57), 4 states have internal predecessors, (57), 2 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (18), 3 states have call predecessors, (18), 2 states have call successors, (18) [2024-11-02 12:23:13,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 12:23:13,050 INFO L93 Difference]: Finished difference Result 5342 states and 8510 transitions. [2024-11-02 12:23:13,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-02 12:23:13,051 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.4) internal successors, (57), 4 states have internal predecessors, (57), 2 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (18), 3 states have call predecessors, (18), 2 states have call successors, (18) Word has length 99 [2024-11-02 12:23:13,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 12:23:13,087 INFO L225 Difference]: With dead ends: 5342 [2024-11-02 12:23:13,087 INFO L226 Difference]: Without dead ends: 2919 [2024-11-02 12:23:13,102 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2024-11-02 12:23:13,102 INFO L432 NwaCegarLoop]: 547 mSDtfsCounter, 0 mSDsluCounter, 1619 mSDsCounter, 0 mSdLazyCounter, 143 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 2166 SdHoareTripleChecker+Invalid, 160 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 143 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-02 12:23:13,103 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 2166 Invalid, 160 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 143 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-02 12:23:13,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2919 states. [2024-11-02 12:23:13,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2919 to 2907. [2024-11-02 12:23:13,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2907 states, 2045 states have (on average 1.512958435207824) internal successors, (3094), 2178 states have internal predecessors, (3094), 667 states have call successors, (667), 170 states have call predecessors, (667), 194 states have return successors, (831), 654 states have call predecessors, (831), 662 states have call successors, (831) [2024-11-02 12:23:13,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2907 states to 2907 states and 4592 transitions. [2024-11-02 12:23:13,404 INFO L78 Accepts]: Start accepts. Automaton has 2907 states and 4592 transitions. Word has length 99 [2024-11-02 12:23:13,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 12:23:13,405 INFO L471 AbstractCegarLoop]: Abstraction has 2907 states and 4592 transitions. [2024-11-02 12:23:13,405 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.4) internal successors, (57), 4 states have internal predecessors, (57), 2 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (18), 3 states have call predecessors, (18), 2 states have call successors, (18) [2024-11-02 12:23:13,405 INFO L276 IsEmpty]: Start isEmpty. Operand 2907 states and 4592 transitions. [2024-11-02 12:23:13,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2024-11-02 12:23:13,410 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:23:13,411 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2024-11-02 12:23:13,433 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ef8d386-46e9-4386-976f-7dc64c985954/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-02 12:23:13,611 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ef8d386-46e9-4386-976f-7dc64c985954/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 12:23:13,612 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 12:23:13,612 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:23:13,612 INFO L85 PathProgramCache]: Analyzing trace with hash 1952649793, now seen corresponding path program 1 times [2024-11-02 12:23:13,612 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:23:13,613 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [511985745] [2024-11-02 12:23:13,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:23:13,613 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:23:13,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:23:14,030 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 19 proven. 2 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-11-02 12:23:14,030 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 12:23:14,031 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [511985745] [2024-11-02 12:23:14,031 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [511985745] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-02 12:23:14,031 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1159904119] [2024-11-02 12:23:14,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:23:14,031 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 12:23:14,031 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ef8d386-46e9-4386-976f-7dc64c985954/bin/utaipan-verify-DbMuA5NWw2/z3 [2024-11-02 12:23:14,033 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ef8d386-46e9-4386-976f-7dc64c985954/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-02 12:23:14,035 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ef8d386-46e9-4386-976f-7dc64c985954/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-02 12:23:14,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:23:14,491 INFO L255 TraceCheckSpWp]: Trace formula consists of 1810 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-02 12:23:14,497 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-02 12:23:14,573 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 41 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-02 12:23:14,573 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-02 12:23:14,573 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1159904119] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-02 12:23:14,574 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-02 12:23:14,574 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [8] total 9 [2024-11-02 12:23:14,574 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1066999146] [2024-11-02 12:23:14,574 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-02 12:23:14,575 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-02 12:23:14,575 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 12:23:14,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-02 12:23:14,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2024-11-02 12:23:14,576 INFO L87 Difference]: Start difference. First operand 2907 states and 4592 transitions. Second operand has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 3 states have call successors, (21), 3 states have call predecessors, (21), 3 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) [2024-11-02 12:23:15,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 12:23:15,139 INFO L93 Difference]: Finished difference Result 6573 states and 10566 transitions. [2024-11-02 12:23:15,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-02 12:23:15,140 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 3 states have call successors, (21), 3 states have call predecessors, (21), 3 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) Word has length 117 [2024-11-02 12:23:15,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 12:23:15,187 INFO L225 Difference]: With dead ends: 6573 [2024-11-02 12:23:15,187 INFO L226 Difference]: Without dead ends: 3678 [2024-11-02 12:23:15,211 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2024-11-02 12:23:15,212 INFO L432 NwaCegarLoop]: 769 mSDtfsCounter, 527 mSDsluCounter, 460 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 527 SdHoareTripleChecker+Valid, 1229 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-02 12:23:15,214 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [527 Valid, 1229 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-02 12:23:15,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3678 states. [2024-11-02 12:23:15,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3678 to 3622. [2024-11-02 12:23:15,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3622 states, 2558 states have (on average 1.5152462861610634) internal successors, (3876), 2725 states have internal predecessors, (3876), 823 states have call successors, (823), 207 states have call predecessors, (823), 240 states have return successors, (1035), 809 states have call predecessors, (1035), 818 states have call successors, (1035)