./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/elevator_spec3_product24.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 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_d604e7cd-80a9-40c2-8fa8-83c40e9721c0/bin/utaipan-verify-DbMuA5NWw2/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d604e7cd-80a9-40c2-8fa8-83c40e9721c0/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_d604e7cd-80a9-40c2-8fa8-83c40e9721c0/bin/utaipan-verify-DbMuA5NWw2/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d604e7cd-80a9-40c2-8fa8-83c40e9721c0/bin/utaipan-verify-DbMuA5NWw2/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec3_product24.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d604e7cd-80a9-40c2-8fa8-83c40e9721c0/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_d604e7cd-80a9-40c2-8fa8-83c40e9721c0/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 8333bf118d61dc3e3ddedc658c9d6fef28fa288c9b6abdc361c7a0f5f6e109b7 --- Real Ultimate output --- This is Ultimate 0.2.5-dev-4fc63b2 [2024-11-02 12:36:41,052 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-02 12:36:41,146 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d604e7cd-80a9-40c2-8fa8-83c40e9721c0/bin/utaipan-verify-DbMuA5NWw2/config/svcomp-Reach-32bit-Taipan_Default.epf [2024-11-02 12:36:41,153 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-02 12:36:41,154 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-02 12:36:41,181 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-02 12:36:41,182 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-02 12:36:41,182 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-02 12:36:41,183 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-02 12:36:41,183 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-02 12:36:41,184 INFO L153 SettingsManager]: * User list type=DISABLED [2024-11-02 12:36:41,184 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2024-11-02 12:36:41,184 INFO L153 SettingsManager]: * Explicit value domain=true [2024-11-02 12:36:41,185 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2024-11-02 12:36:41,185 INFO L153 SettingsManager]: * Octagon Domain=false [2024-11-02 12:36:41,185 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2024-11-02 12:36:41,186 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2024-11-02 12:36:41,186 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2024-11-02 12:36:41,186 INFO L153 SettingsManager]: * Interval Domain=false [2024-11-02 12:36:41,187 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2024-11-02 12:36:41,187 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2024-11-02 12:36:41,188 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2024-11-02 12:36:41,189 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-02 12:36:41,189 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-02 12:36:41,189 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-02 12:36:41,190 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-02 12:36:41,190 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-02 12:36:41,190 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-02 12:36:41,191 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-02 12:36:41,191 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-02 12:36:41,191 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-02 12:36:41,192 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-02 12:36:41,192 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-02 12:36:41,192 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-02 12:36:41,193 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-02 12:36:41,193 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-02 12:36:41,193 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-02 12:36:41,193 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-02 12:36:41,194 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-02 12:36:41,194 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-02 12:36:41,194 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-02 12:36:41,195 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-02 12:36:41,195 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2024-11-02 12:36:41,195 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-02 12:36:41,196 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-02 12:36:41,196 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2024-11-02 12:36:41,196 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-02 12:36:41,196 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_d604e7cd-80a9-40c2-8fa8-83c40e9721c0/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d604e7cd-80a9-40c2-8fa8-83c40e9721c0/bin/utaipan-verify-DbMuA5NWw2 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8333bf118d61dc3e3ddedc658c9d6fef28fa288c9b6abdc361c7a0f5f6e109b7 [2024-11-02 12:36:41,449 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-02 12:36:41,478 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-02 12:36:41,481 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-02 12:36:41,485 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-02 12:36:41,485 INFO L274 PluginConnector]: CDTParser initialized [2024-11-02 12:36:41,487 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d604e7cd-80a9-40c2-8fa8-83c40e9721c0/bin/utaipan-verify-DbMuA5NWw2/../../sv-benchmarks/c/product-lines/elevator_spec3_product24.cil.c Unable to find full path for "g++" [2024-11-02 12:36:43,532 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-02 12:36:43,973 INFO L384 CDTParser]: Found 1 translation units. [2024-11-02 12:36:43,973 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d604e7cd-80a9-40c2-8fa8-83c40e9721c0/sv-benchmarks/c/product-lines/elevator_spec3_product24.cil.c [2024-11-02 12:36:43,999 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d604e7cd-80a9-40c2-8fa8-83c40e9721c0/bin/utaipan-verify-DbMuA5NWw2/data/b1af385dd/19a6c1d238034fbca74902b72fe22f69/FLAG9af6c4b27 [2024-11-02 12:36:44,017 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d604e7cd-80a9-40c2-8fa8-83c40e9721c0/bin/utaipan-verify-DbMuA5NWw2/data/b1af385dd/19a6c1d238034fbca74902b72fe22f69 [2024-11-02 12:36:44,020 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-02 12:36:44,024 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-02 12:36:44,025 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-02 12:36:44,026 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-02 12:36:44,033 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-02 12:36:44,035 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 12:36:44" (1/1) ... [2024-11-02 12:36:44,036 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@46d70118 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:36:44, skipping insertion in model container [2024-11-02 12:36:44,039 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 12:36:44" (1/1) ... [2024-11-02 12:36:44,115 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-02 12:36:44,832 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_d604e7cd-80a9-40c2-8fa8-83c40e9721c0/sv-benchmarks/c/product-lines/elevator_spec3_product24.cil.c[75121,75134] [2024-11-02 12:36:44,836 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-02 12:36:44,848 INFO L200 MainTranslator]: Completed pre-run [2024-11-02 12:36:44,859 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"scenario.i","") [48] [2024-11-02 12:36:44,860 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Test.i","") [67] [2024-11-02 12:36:44,861 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Person.i","") [425] [2024-11-02 12:36:44,861 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"UnitTests.i","") [545] [2024-11-02 12:36:44,861 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Elevator.i","") [641] [2024-11-02 12:36:44,861 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Floor.i","") [2290] [2024-11-02 12:36:44,862 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Specification3_spec.i","") [2951] [2024-11-02 12:36:44,862 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"libacc.i","") [3138] [2024-11-02 12:36:44,862 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"featureselect.i","") [3504] [2024-11-02 12:36:44,862 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"wsllib_check.i","") [3539] [2024-11-02 12:36:45,047 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_d604e7cd-80a9-40c2-8fa8-83c40e9721c0/sv-benchmarks/c/product-lines/elevator_spec3_product24.cil.c[75121,75134] [2024-11-02 12:36:45,049 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-02 12:36:45,144 INFO L204 MainTranslator]: Completed translation [2024-11-02 12:36:45,144 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:36:45 WrapperNode [2024-11-02 12:36:45,144 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-02 12:36:45,145 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-02 12:36:45,146 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-02 12:36:45,146 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-02 12:36:45,157 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:36:45" (1/1) ... [2024-11-02 12:36:45,199 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:36:45" (1/1) ... [2024-11-02 12:36:45,281 INFO L138 Inliner]: procedures = 96, calls = 359, calls flagged for inlining = 27, calls inlined = 23, statements flattened = 965 [2024-11-02 12:36:45,281 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-02 12:36:45,285 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-02 12:36:45,285 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-02 12:36:45,285 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-02 12:36:45,296 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:36:45" (1/1) ... [2024-11-02 12:36:45,296 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:36:45" (1/1) ... [2024-11-02 12:36:45,307 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:36:45" (1/1) ... [2024-11-02 12:36:45,307 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:36:45" (1/1) ... [2024-11-02 12:36:45,341 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:36:45" (1/1) ... [2024-11-02 12:36:45,366 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:36:45" (1/1) ... [2024-11-02 12:36:45,373 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:36:45" (1/1) ... [2024-11-02 12:36:45,382 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:36:45" (1/1) ... [2024-11-02 12:36:45,396 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-02 12:36:45,396 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-02 12:36:45,396 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-02 12:36:45,397 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-02 12:36:45,397 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:36:45" (1/1) ... [2024-11-02 12:36:45,407 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-02 12:36:45,417 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d604e7cd-80a9-40c2-8fa8-83c40e9721c0/bin/utaipan-verify-DbMuA5NWw2/z3 [2024-11-02 12:36:45,432 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d604e7cd-80a9-40c2-8fa8-83c40e9721c0/bin/utaipan-verify-DbMuA5NWw2/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2024-11-02 12:36:45,438 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d604e7cd-80a9-40c2-8fa8-83c40e9721c0/bin/utaipan-verify-DbMuA5NWw2/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2024-11-02 12:36:45,467 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-02 12:36:45,467 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor__wrappee__twothirdsfull [2024-11-02 12:36:45,467 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor__wrappee__twothirdsfull [2024-11-02 12:36:45,468 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentHeading [2024-11-02 12:36:45,468 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentHeading [2024-11-02 12:36:45,468 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2024-11-02 12:36:45,469 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2024-11-02 12:36:45,469 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2024-11-02 12:36:45,469 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2024-11-02 12:36:45,469 INFO L130 BoogieDeclarations]: Found specification of procedure isExecutiveFloorCalling [2024-11-02 12:36:45,470 INFO L138 BoogieDeclarations]: Found implementation of procedure isExecutiveFloorCalling [2024-11-02 12:36:45,470 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2024-11-02 12:36:45,471 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2024-11-02 12:36:45,471 INFO L130 BoogieDeclarations]: Found specification of procedure bobCall [2024-11-02 12:36:45,472 INFO L138 BoogieDeclarations]: Found implementation of procedure bobCall [2024-11-02 12:36:45,472 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2024-11-02 12:36:45,472 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2024-11-02 12:36:45,472 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2024-11-02 12:36:45,472 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2024-11-02 12:36:45,472 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2024-11-02 12:36:45,472 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2024-11-02 12:36:45,472 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2024-11-02 12:36:45,472 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2024-11-02 12:36:45,473 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2024-11-02 12:36:45,473 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2024-11-02 12:36:45,473 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2024-11-02 12:36:45,473 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2024-11-02 12:36:45,473 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2024-11-02 12:36:45,473 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2024-11-02 12:36:45,473 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2024-11-02 12:36:45,473 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2024-11-02 12:36:45,473 INFO L130 BoogieDeclarations]: Found specification of procedure initTopDown [2024-11-02 12:36:45,473 INFO L138 BoogieDeclarations]: Found implementation of procedure initTopDown [2024-11-02 12:36:45,474 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2024-11-02 12:36:45,474 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2024-11-02 12:36:45,474 INFO L130 BoogieDeclarations]: Found specification of procedure initFloors [2024-11-02 12:36:45,474 INFO L138 BoogieDeclarations]: Found implementation of procedure initFloors [2024-11-02 12:36:45,474 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2024-11-02 12:36:45,474 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2024-11-02 12:36:45,474 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2024-11-02 12:36:45,478 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2024-11-02 12:36:45,478 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2024-11-02 12:36:45,478 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2024-11-02 12:36:45,479 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2024-11-02 12:36:45,479 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2024-11-02 12:36:45,479 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2024-11-02 12:36:45,479 INFO L130 BoogieDeclarations]: Found specification of procedure buttonForFloorIsPressed [2024-11-02 12:36:45,479 INFO L138 BoogieDeclarations]: Found implementation of procedure buttonForFloorIsPressed [2024-11-02 12:36:45,479 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2024-11-02 12:36:45,480 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2024-11-02 12:36:45,480 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2024-11-02 12:36:45,480 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2024-11-02 12:36:45,480 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2024-11-02 12:36:45,480 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2024-11-02 12:36:45,481 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection__wrappee__weight [2024-11-02 12:36:45,481 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection__wrappee__weight [2024-11-02 12:36:45,481 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-02 12:36:45,481 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-02 12:36:45,481 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2024-11-02 12:36:45,481 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2024-11-02 12:36:45,481 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift__wrappee__executivefloor [2024-11-02 12:36:45,481 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift__wrappee__executivefloor [2024-11-02 12:36:45,664 INFO L238 CfgBuilder]: Building ICFG [2024-11-02 12:36:45,667 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-02 12:36:47,286 INFO L? ?]: Removed 485 outVars from TransFormulas that were not future-live. [2024-11-02 12:36:47,287 INFO L287 CfgBuilder]: Performing block encoding [2024-11-02 12:36:48,238 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-02 12:36:48,238 INFO L316 CfgBuilder]: Removed 1 assume(true) statements. [2024-11-02 12:36:48,243 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 12:36:48 BoogieIcfgContainer [2024-11-02 12:36:48,243 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-02 12:36:48,245 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-02 12:36:48,245 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-02 12:36:48,251 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-02 12:36:48,251 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.11 12:36:44" (1/3) ... [2024-11-02 12:36:48,252 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5edcd339 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 12:36:48, skipping insertion in model container [2024-11-02 12:36:48,252 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:36:45" (2/3) ... [2024-11-02 12:36:48,253 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5edcd339 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 12:36:48, skipping insertion in model container [2024-11-02 12:36:48,254 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 12:36:48" (3/3) ... [2024-11-02 12:36:48,255 INFO L112 eAbstractionObserver]: Analyzing ICFG elevator_spec3_product24.cil.c [2024-11-02 12:36:48,274 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-02 12:36:48,274 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-11-02 12:36:48,361 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-02 12:36:48,370 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;@bd119eb, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-02 12:36:48,370 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-02 12:36:48,377 INFO L276 IsEmpty]: Start isEmpty. Operand has 434 states, 288 states have (on average 1.5555555555555556) internal successors, (448), 308 states have internal predecessors, (448), 115 states have call successors, (115), 29 states have call predecessors, (115), 29 states have return successors, (115), 111 states have call predecessors, (115), 115 states have call successors, (115) [2024-11-02 12:36:48,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2024-11-02 12:36:48,387 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:36:48,388 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] [2024-11-02 12:36:48,390 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 12:36:48,395 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:36:48,396 INFO L85 PathProgramCache]: Analyzing trace with hash -1954318302, now seen corresponding path program 1 times [2024-11-02 12:36:48,406 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:36:48,406 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [897297966] [2024-11-02 12:36:48,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:36:48,407 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:36:48,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:36:49,415 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 12:36:49,416 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 12:36:49,416 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [897297966] [2024-11-02 12:36:49,418 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [897297966] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-02 12:36:49,418 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-02 12:36:49,418 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-02 12:36:49,420 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1404503800] [2024-11-02 12:36:49,422 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-02 12:36:49,427 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-02 12:36:49,428 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 12:36:49,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-02 12:36:49,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-02 12:36:49,470 INFO L87 Difference]: Start difference. First operand has 434 states, 288 states have (on average 1.5555555555555556) internal successors, (448), 308 states have internal predecessors, (448), 115 states have call successors, (115), 29 states have call predecessors, (115), 29 states have return successors, (115), 111 states have call predecessors, (115), 115 states have call successors, (115) Second operand has 6 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 4 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2024-11-02 12:36:51,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 12:36:51,197 INFO L93 Difference]: Finished difference Result 1228 states and 1947 transitions. [2024-11-02 12:36:51,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-02 12:36:51,200 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 4 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) Word has length 49 [2024-11-02 12:36:51,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 12:36:51,231 INFO L225 Difference]: With dead ends: 1228 [2024-11-02 12:36:51,231 INFO L226 Difference]: Without dead ends: 796 [2024-11-02 12:36:51,245 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-11-02 12:36:51,250 INFO L432 NwaCegarLoop]: 638 mSDtfsCounter, 557 mSDsluCounter, 2257 mSDsCounter, 0 mSdLazyCounter, 729 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 561 SdHoareTripleChecker+Valid, 2895 SdHoareTripleChecker+Invalid, 767 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 729 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2024-11-02 12:36:51,252 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [561 Valid, 2895 Invalid, 767 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 729 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2024-11-02 12:36:51,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 796 states. [2024-11-02 12:36:51,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 796 to 789. [2024-11-02 12:36:51,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 789 states, 525 states have (on average 1.4857142857142858) internal successors, (780), 559 states have internal predecessors, (780), 212 states have call successors, (212), 55 states have call predecessors, (212), 51 states have return successors, (215), 201 states have call predecessors, (215), 208 states have call successors, (215) [2024-11-02 12:36:51,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 789 states to 789 states and 1207 transitions. [2024-11-02 12:36:51,389 INFO L78 Accepts]: Start accepts. Automaton has 789 states and 1207 transitions. Word has length 49 [2024-11-02 12:36:51,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 12:36:51,390 INFO L471 AbstractCegarLoop]: Abstraction has 789 states and 1207 transitions. [2024-11-02 12:36:51,391 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 4 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2024-11-02 12:36:51,391 INFO L276 IsEmpty]: Start isEmpty. Operand 789 states and 1207 transitions. [2024-11-02 12:36:51,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2024-11-02 12:36:51,393 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:36:51,394 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] [2024-11-02 12:36:51,394 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-02 12:36:51,394 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 12:36:51,395 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:36:51,396 INFO L85 PathProgramCache]: Analyzing trace with hash -1144215930, now seen corresponding path program 1 times [2024-11-02 12:36:51,396 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:36:51,396 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [734483196] [2024-11-02 12:36:51,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:36:51,397 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:36:51,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:36:51,740 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 12:36:51,740 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 12:36:51,741 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [734483196] [2024-11-02 12:36:51,741 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [734483196] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-02 12:36:51,742 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-02 12:36:51,742 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-02 12:36:51,742 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1062524032] [2024-11-02 12:36:51,743 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-02 12:36:51,744 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-02 12:36:51,745 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 12:36:51,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-02 12:36:51,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-02 12:36:51,747 INFO L87 Difference]: Start difference. First operand 789 states and 1207 transitions. Second operand has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 3 states have call successors, (11), 3 states have call predecessors, (11), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2024-11-02 12:36:52,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 12:36:52,134 INFO L93 Difference]: Finished difference Result 2337 states and 3609 transitions. [2024-11-02 12:36:52,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-02 12:36:52,135 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 3 states have call successors, (11), 3 states have call predecessors, (11), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 50 [2024-11-02 12:36:52,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 12:36:52,159 INFO L225 Difference]: With dead ends: 2337 [2024-11-02 12:36:52,159 INFO L226 Difference]: Without dead ends: 1561 [2024-11-02 12:36:52,165 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-02 12:36:52,166 INFO L432 NwaCegarLoop]: 688 mSDtfsCounter, 633 mSDsluCounter, 603 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 633 SdHoareTripleChecker+Valid, 1291 SdHoareTripleChecker+Invalid, 108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-02 12:36:52,167 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [633 Valid, 1291 Invalid, 108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 108 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-02 12:36:52,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1561 states. [2024-11-02 12:36:52,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1561 to 1489. [2024-11-02 12:36:52,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1489 states, 1019 states have (on average 1.4985279685966635) internal successors, (1527), 1071 states have internal predecessors, (1527), 377 states have call successors, (377), 99 states have call predecessors, (377), 92 states have return successors, (397), 346 states have call predecessors, (397), 371 states have call successors, (397) [2024-11-02 12:36:52,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1489 states to 1489 states and 2301 transitions. [2024-11-02 12:36:52,341 INFO L78 Accepts]: Start accepts. Automaton has 1489 states and 2301 transitions. Word has length 50 [2024-11-02 12:36:52,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 12:36:52,343 INFO L471 AbstractCegarLoop]: Abstraction has 1489 states and 2301 transitions. [2024-11-02 12:36:52,343 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 3 states have call successors, (11), 3 states have call predecessors, (11), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2024-11-02 12:36:52,343 INFO L276 IsEmpty]: Start isEmpty. Operand 1489 states and 2301 transitions. [2024-11-02 12:36:52,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2024-11-02 12:36:52,353 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:36:52,353 INFO L215 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-02 12:36:52,353 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-02 12:36:52,354 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 12:36:52,357 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:36:52,357 INFO L85 PathProgramCache]: Analyzing trace with hash -1576729362, now seen corresponding path program 1 times [2024-11-02 12:36:52,358 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:36:52,358 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1528615572] [2024-11-02 12:36:52,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:36:52,358 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:36:52,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:36:52,932 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2024-11-02 12:36:52,932 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 12:36:52,932 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1528615572] [2024-11-02 12:36:52,933 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1528615572] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-02 12:36:52,933 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-02 12:36:52,933 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-02 12:36:52,933 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1825891412] [2024-11-02 12:36:52,933 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-02 12:36:52,934 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-02 12:36:52,934 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 12:36:52,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-02 12:36:52,937 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-02 12:36:52,937 INFO L87 Difference]: Start difference. First operand 1489 states and 2301 transitions. Second operand has 6 states, 5 states have (on average 10.0) internal successors, (50), 5 states have internal predecessors, (50), 3 states have call successors, (19), 3 states have call predecessors, (19), 3 states have return successors, (17), 4 states have call predecessors, (17), 3 states have call successors, (17) [2024-11-02 12:36:53,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 12:36:53,949 INFO L93 Difference]: Finished difference Result 3698 states and 5820 transitions. [2024-11-02 12:36:53,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-02 12:36:53,950 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 10.0) internal successors, (50), 5 states have internal predecessors, (50), 3 states have call successors, (19), 3 states have call predecessors, (19), 3 states have return successors, (17), 4 states have call predecessors, (17), 3 states have call successors, (17) Word has length 94 [2024-11-02 12:36:53,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 12:36:53,972 INFO L225 Difference]: With dead ends: 3698 [2024-11-02 12:36:53,973 INFO L226 Difference]: Without dead ends: 2221 [2024-11-02 12:36:53,985 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-11-02 12:36:53,987 INFO L432 NwaCegarLoop]: 697 mSDtfsCounter, 620 mSDsluCounter, 2470 mSDsCounter, 0 mSdLazyCounter, 493 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 632 SdHoareTripleChecker+Valid, 3167 SdHoareTripleChecker+Invalid, 517 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 493 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-11-02 12:36:53,987 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [632 Valid, 3167 Invalid, 517 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 493 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-11-02 12:36:53,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2221 states. [2024-11-02 12:36:54,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2221 to 2185. [2024-11-02 12:36:54,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2185 states, 1499 states have (on average 1.4916611074049366) internal successors, (2236), 1583 states have internal predecessors, (2236), 548 states have call successors, (548), 147 states have call predecessors, (548), 137 states have return successors, (617), 497 states have call predecessors, (617), 540 states have call successors, (617) [2024-11-02 12:36:54,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2185 states to 2185 states and 3401 transitions. [2024-11-02 12:36:54,214 INFO L78 Accepts]: Start accepts. Automaton has 2185 states and 3401 transitions. Word has length 94 [2024-11-02 12:36:54,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 12:36:54,214 INFO L471 AbstractCegarLoop]: Abstraction has 2185 states and 3401 transitions. [2024-11-02 12:36:54,215 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 10.0) internal successors, (50), 5 states have internal predecessors, (50), 3 states have call successors, (19), 3 states have call predecessors, (19), 3 states have return successors, (17), 4 states have call predecessors, (17), 3 states have call successors, (17) [2024-11-02 12:36:54,215 INFO L276 IsEmpty]: Start isEmpty. Operand 2185 states and 3401 transitions. [2024-11-02 12:36:54,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2024-11-02 12:36:54,223 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:36:54,223 INFO L215 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-02 12:36:54,223 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-02 12:36:54,224 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 12:36:54,224 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:36:54,224 INFO L85 PathProgramCache]: Analyzing trace with hash 1483817016, now seen corresponding path program 1 times [2024-11-02 12:36:54,224 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:36:54,225 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [738271618] [2024-11-02 12:36:54,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:36:54,225 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:36:54,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:36:54,637 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 12:36:54,638 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 12:36:54,638 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [738271618] [2024-11-02 12:36:54,638 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [738271618] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-02 12:36:54,639 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [515193873] [2024-11-02 12:36:54,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:36:54,640 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 12:36:54,640 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d604e7cd-80a9-40c2-8fa8-83c40e9721c0/bin/utaipan-verify-DbMuA5NWw2/z3 [2024-11-02 12:36:54,643 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d604e7cd-80a9-40c2-8fa8-83c40e9721c0/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-02 12:36:54,644 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d604e7cd-80a9-40c2-8fa8-83c40e9721c0/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-02 12:36:55,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:36:55,141 INFO L255 TraceCheckSpWp]: Trace formula consists of 1770 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-02 12:36:55,158 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-02 12:36:55,337 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-02 12:36:55,338 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-02 12:36:55,338 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [515193873] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-02 12:36:55,338 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-02 12:36:55,339 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2024-11-02 12:36:55,339 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [668401123] [2024-11-02 12:36:55,339 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-02 12:36:55,340 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-02 12:36:55,340 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 12:36:55,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-02 12:36:55,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2024-11-02 12:36:55,342 INFO L87 Difference]: Start difference. First operand 2185 states and 3401 transitions. Second operand has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 3 states have call successors, (18), 3 states have call predecessors, (18), 3 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2024-11-02 12:36:55,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 12:36:55,805 INFO L93 Difference]: Finished difference Result 6283 states and 10039 transitions. [2024-11-02 12:36:55,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-02 12:36:55,805 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 3 states have call successors, (18), 3 states have call predecessors, (18), 3 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) Word has length 92 [2024-11-02 12:36:55,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 12:36:55,843 INFO L225 Difference]: With dead ends: 6283 [2024-11-02 12:36:55,844 INFO L226 Difference]: Without dead ends: 4110 [2024-11-02 12:36:55,861 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 93 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 12:36:55,862 INFO L432 NwaCegarLoop]: 1109 mSDtfsCounter, 593 mSDsluCounter, 537 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 593 SdHoareTripleChecker+Valid, 1646 SdHoareTripleChecker+Invalid, 116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-02 12:36:55,863 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [593 Valid, 1646 Invalid, 116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-02 12:36:55,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4110 states. [2024-11-02 12:36:56,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4110 to 3992. [2024-11-02 12:36:56,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3992 states, 2753 states have (on average 1.5041772611696331) internal successors, (4141), 2923 states have internal predecessors, (4141), 981 states have call successors, (981), 264 states have call predecessors, (981), 257 states have return successors, (1150), 890 states have call predecessors, (1150), 973 states have call successors, (1150) [2024-11-02 12:36:56,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3992 states to 3992 states and 6272 transitions. [2024-11-02 12:36:56,196 INFO L78 Accepts]: Start accepts. Automaton has 3992 states and 6272 transitions. Word has length 92 [2024-11-02 12:36:56,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 12:36:56,197 INFO L471 AbstractCegarLoop]: Abstraction has 3992 states and 6272 transitions. [2024-11-02 12:36:56,198 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 3 states have call successors, (18), 3 states have call predecessors, (18), 3 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2024-11-02 12:36:56,198 INFO L276 IsEmpty]: Start isEmpty. Operand 3992 states and 6272 transitions. [2024-11-02 12:36:56,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2024-11-02 12:36:56,201 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:36:56,202 INFO L215 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-02 12:36:56,228 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d604e7cd-80a9-40c2-8fa8-83c40e9721c0/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-11-02 12:36:56,402 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d604e7cd-80a9-40c2-8fa8-83c40e9721c0/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 12:36:56,403 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 12:36:56,403 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:36:56,404 INFO L85 PathProgramCache]: Analyzing trace with hash 822625353, now seen corresponding path program 1 times [2024-11-02 12:36:56,404 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:36:56,404 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [994975718] [2024-11-02 12:36:56,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:36:56,406 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:36:56,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:36:56,785 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 12:36:56,785 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 12:36:56,786 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [994975718] [2024-11-02 12:36:56,786 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [994975718] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-02 12:36:56,786 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1166377931] [2024-11-02 12:36:56,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:36:56,787 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 12:36:56,787 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d604e7cd-80a9-40c2-8fa8-83c40e9721c0/bin/utaipan-verify-DbMuA5NWw2/z3 [2024-11-02 12:36:56,790 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d604e7cd-80a9-40c2-8fa8-83c40e9721c0/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-02 12:36:56,792 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d604e7cd-80a9-40c2-8fa8-83c40e9721c0/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-02 12:36:57,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:36:57,246 INFO L255 TraceCheckSpWp]: Trace formula consists of 1771 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-02 12:36:57,251 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-02 12:36:57,394 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-02 12:36:57,395 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-02 12:36:57,395 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1166377931] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-02 12:36:57,395 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-02 12:36:57,396 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2024-11-02 12:36:57,396 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1100085377] [2024-11-02 12:36:57,396 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-02 12:36:57,397 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-02 12:36:57,398 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 12:36:57,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-02 12:36:57,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2024-11-02 12:36:57,400 INFO L87 Difference]: Start difference. First operand 3992 states and 6272 transitions. Second operand has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 3 states have call successors, (18), 3 states have call predecessors, (18), 3 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2024-11-02 12:36:57,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 12:36:57,968 INFO L93 Difference]: Finished difference Result 8977 states and 14257 transitions. [2024-11-02 12:36:57,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-02 12:36:57,968 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 3 states have call successors, (18), 3 states have call predecessors, (18), 3 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) Word has length 94 [2024-11-02 12:36:57,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 12:36:58,024 INFO L225 Difference]: With dead ends: 8977 [2024-11-02 12:36:58,024 INFO L226 Difference]: Without dead ends: 4997 [2024-11-02 12:36:58,059 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2024-11-02 12:36:58,063 INFO L432 NwaCegarLoop]: 638 mSDtfsCounter, 592 mSDsluCounter, 534 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 592 SdHoareTripleChecker+Valid, 1172 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-02 12:36:58,064 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [592 Valid, 1172 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-02 12:36:58,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4997 states. [2024-11-02 12:36:58,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4997 to 4933. [2024-11-02 12:36:58,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4933 states, 3413 states have (on average 1.5145033694696748) internal successors, (5169), 3626 states have internal predecessors, (5169), 1202 states have call successors, (1202), 321 states have call predecessors, (1202), 317 states have return successors, (1408), 1094 states have call predecessors, (1408), 1194 states have call successors, (1408) [2024-11-02 12:36:58,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4933 states to 4933 states and 7779 transitions. [2024-11-02 12:36:58,486 INFO L78 Accepts]: Start accepts. Automaton has 4933 states and 7779 transitions. Word has length 94 [2024-11-02 12:36:58,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 12:36:58,487 INFO L471 AbstractCegarLoop]: Abstraction has 4933 states and 7779 transitions. [2024-11-02 12:36:58,487 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 3 states have call successors, (18), 3 states have call predecessors, (18), 3 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2024-11-02 12:36:58,487 INFO L276 IsEmpty]: Start isEmpty. Operand 4933 states and 7779 transitions. [2024-11-02 12:36:58,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2024-11-02 12:36:58,491 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:36:58,492 INFO L215 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-02 12:36:58,518 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d604e7cd-80a9-40c2-8fa8-83c40e9721c0/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-11-02 12:36:58,695 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d604e7cd-80a9-40c2-8fa8-83c40e9721c0/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 12:36:58,696 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 12:36:58,696 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:36:58,697 INFO L85 PathProgramCache]: Analyzing trace with hash 692370920, now seen corresponding path program 1 times [2024-11-02 12:36:58,697 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:36:58,697 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1295326204] [2024-11-02 12:36:58,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:36:58,697 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:36:58,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:36:59,461 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2024-11-02 12:36:59,461 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 12:36:59,461 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1295326204] [2024-11-02 12:36:59,461 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1295326204] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-02 12:36:59,462 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [970190106] [2024-11-02 12:36:59,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:36:59,462 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 12:36:59,462 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d604e7cd-80a9-40c2-8fa8-83c40e9721c0/bin/utaipan-verify-DbMuA5NWw2/z3 [2024-11-02 12:36:59,464 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d604e7cd-80a9-40c2-8fa8-83c40e9721c0/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-02 12:36:59,465 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d604e7cd-80a9-40c2-8fa8-83c40e9721c0/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-02 12:36:59,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:36:59,951 INFO L255 TraceCheckSpWp]: Trace formula consists of 1793 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-02 12:36:59,957 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-02 12:37:00,146 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-02 12:37:00,147 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-02 12:37:00,147 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [970190106] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-02 12:37:00,147 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-02 12:37:00,147 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [10] total 12 [2024-11-02 12:37:00,147 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [387866698] [2024-11-02 12:37:00,148 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-02 12:37:00,148 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-02 12:37:00,149 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 12:37:00,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-02 12:37:00,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2024-11-02 12:37:00,150 INFO L87 Difference]: Start difference. First operand 4933 states and 7779 transitions. Second operand has 4 states, 4 states have (on average 13.5) internal successors, (54), 3 states have internal predecessors, (54), 2 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) [2024-11-02 12:37:00,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 12:37:00,801 INFO L93 Difference]: Finished difference Result 10754 states and 16982 transitions. [2024-11-02 12:37:00,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-02 12:37:00,801 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.5) internal successors, (54), 3 states have internal predecessors, (54), 2 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) Word has length 99 [2024-11-02 12:37:00,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 12:37:00,879 INFO L225 Difference]: With dead ends: 10754 [2024-11-02 12:37:00,879 INFO L226 Difference]: Without dead ends: 5833 [2024-11-02 12:37:00,923 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2024-11-02 12:37:00,924 INFO L432 NwaCegarLoop]: 740 mSDtfsCounter, 415 mSDsluCounter, 1137 mSDsCounter, 0 mSdLazyCounter, 124 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 415 SdHoareTripleChecker+Valid, 1877 SdHoareTripleChecker+Invalid, 126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 124 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-02 12:37:00,925 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [415 Valid, 1877 Invalid, 126 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 124 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-02 12:37:00,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5833 states. [2024-11-02 12:37:01,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5833 to 5793. [2024-11-02 12:37:01,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5793 states, 3970 states have (on average 1.480352644836272) internal successors, (5877), 4187 states have internal predecessors, (5877), 1397 states have call successors, (1397), 426 states have call predecessors, (1397), 425 states have return successors, (1736), 1285 states have call predecessors, (1736), 1386 states have call successors, (1736) [2024-11-02 12:37:01,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5793 states to 5793 states and 9010 transitions. [2024-11-02 12:37:01,452 INFO L78 Accepts]: Start accepts. Automaton has 5793 states and 9010 transitions. Word has length 99 [2024-11-02 12:37:01,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 12:37:01,453 INFO L471 AbstractCegarLoop]: Abstraction has 5793 states and 9010 transitions. [2024-11-02 12:37:01,453 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.5) internal successors, (54), 3 states have internal predecessors, (54), 2 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) [2024-11-02 12:37:01,454 INFO L276 IsEmpty]: Start isEmpty. Operand 5793 states and 9010 transitions. [2024-11-02 12:37:01,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2024-11-02 12:37:01,461 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:37:01,461 INFO L215 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-02 12:37:01,491 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d604e7cd-80a9-40c2-8fa8-83c40e9721c0/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-02 12:37:01,662 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d604e7cd-80a9-40c2-8fa8-83c40e9721c0/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 12:37:01,664 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 12:37:01,664 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:37:01,665 INFO L85 PathProgramCache]: Analyzing trace with hash 1072740826, now seen corresponding path program 1 times [2024-11-02 12:37:01,665 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:37:01,665 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1545739090] [2024-11-02 12:37:01,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:37:01,666 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:37:01,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:37:02,507 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2024-11-02 12:37:02,507 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 12:37:02,508 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1545739090] [2024-11-02 12:37:02,508 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1545739090] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-02 12:37:02,508 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [319020433] [2024-11-02 12:37:02,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:37:02,508 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 12:37:02,509 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d604e7cd-80a9-40c2-8fa8-83c40e9721c0/bin/utaipan-verify-DbMuA5NWw2/z3 [2024-11-02 12:37:02,511 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d604e7cd-80a9-40c2-8fa8-83c40e9721c0/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-02 12:37:02,512 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d604e7cd-80a9-40c2-8fa8-83c40e9721c0/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-02 12:37:02,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:37:02,962 INFO L255 TraceCheckSpWp]: Trace formula consists of 1793 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-11-02 12:37:02,966 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-02 12:37:03,415 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-02 12:37:03,415 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-02 12:37:03,890 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2024-11-02 12:37:03,890 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [319020433] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-02 12:37:03,890 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [55018136] [2024-11-02 12:37:03,922 INFO L159 IcfgInterpreter]: Started Sifa with 87 locations of interest [2024-11-02 12:37:03,922 INFO L166 IcfgInterpreter]: Building call graph [2024-11-02 12:37:03,927 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-02 12:37:03,932 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-02 12:37:03,933 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs