./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/forester-heap/sll-rb-sentinel-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 26d01a9c Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/forester-heap/sll-rb-sentinel-1.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash b05b18c0458ef705f828769f88cc2a590589ce4d5c3f0e48f99be90a949f7ed4 --- Real Ultimate output --- This is Ultimate 0.2.2-?-26d01a9 [2023-02-17 23:00:51,401 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-02-17 23:00:51,402 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-02-17 23:00:51,432 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-02-17 23:00:51,433 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-02-17 23:00:51,434 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-02-17 23:00:51,439 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-02-17 23:00:51,443 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-02-17 23:00:51,445 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-02-17 23:00:51,446 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-02-17 23:00:51,447 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-02-17 23:00:51,449 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-02-17 23:00:51,450 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-02-17 23:00:51,453 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-02-17 23:00:51,456 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-02-17 23:00:51,469 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-02-17 23:00:51,470 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-02-17 23:00:51,470 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-02-17 23:00:51,471 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-02-17 23:00:51,473 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-02-17 23:00:51,473 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-02-17 23:00:51,481 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-02-17 23:00:51,482 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-02-17 23:00:51,482 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-02-17 23:00:51,487 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-02-17 23:00:51,487 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-02-17 23:00:51,487 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-02-17 23:00:51,488 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-02-17 23:00:51,488 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-02-17 23:00:51,489 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-02-17 23:00:51,489 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-02-17 23:00:51,490 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-02-17 23:00:51,490 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-02-17 23:00:51,491 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-02-17 23:00:51,491 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-02-17 23:00:51,492 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-02-17 23:00:51,492 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-02-17 23:00:51,492 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-02-17 23:00:51,493 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-02-17 23:00:51,493 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-02-17 23:00:51,494 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-02-17 23:00:51,498 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-02-17 23:00:51,564 INFO L113 SettingsManager]: Loading preferences was successful [2023-02-17 23:00:51,564 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-02-17 23:00:51,565 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-02-17 23:00:51,565 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-02-17 23:00:51,569 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-02-17 23:00:51,569 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-02-17 23:00:51,570 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-02-17 23:00:51,570 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-02-17 23:00:51,570 INFO L138 SettingsManager]: * Use SBE=true [2023-02-17 23:00:51,570 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-02-17 23:00:51,570 INFO L138 SettingsManager]: * sizeof long=4 [2023-02-17 23:00:51,570 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-02-17 23:00:51,578 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-02-17 23:00:51,578 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-02-17 23:00:51,578 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-02-17 23:00:51,578 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-02-17 23:00:51,579 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-02-17 23:00:51,579 INFO L138 SettingsManager]: * sizeof long double=12 [2023-02-17 23:00:51,579 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-02-17 23:00:51,579 INFO L138 SettingsManager]: * Use constant arrays=true [2023-02-17 23:00:51,579 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-02-17 23:00:51,579 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-02-17 23:00:51,579 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-02-17 23:00:51,579 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-02-17 23:00:51,579 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-17 23:00:51,579 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-02-17 23:00:51,580 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-02-17 23:00:51,580 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-02-17 23:00:51,580 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-02-17 23:00:51,580 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-02-17 23:00:51,580 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-02-17 23:00:51,580 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-02-17 23:00:51,580 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-02-17 23:00:51,580 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-02-17 23:00:51,580 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-02-17 23:00:51,580 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b05b18c0458ef705f828769f88cc2a590589ce4d5c3f0e48f99be90a949f7ed4 [2023-02-17 23:00:51,772 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-02-17 23:00:51,795 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-02-17 23:00:51,798 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-02-17 23:00:51,799 INFO L271 PluginConnector]: Initializing CDTParser... [2023-02-17 23:00:51,799 INFO L275 PluginConnector]: CDTParser initialized [2023-02-17 23:00:51,800 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/forester-heap/sll-rb-sentinel-1.i [2023-02-17 23:00:52,971 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-02-17 23:00:53,184 INFO L351 CDTParser]: Found 1 translation units. [2023-02-17 23:00:53,185 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/forester-heap/sll-rb-sentinel-1.i [2023-02-17 23:00:53,192 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/34942a96f/083e9dd98f7145229a1781be83e20a1a/FLAG5608577b8 [2023-02-17 23:00:53,201 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/34942a96f/083e9dd98f7145229a1781be83e20a1a [2023-02-17 23:00:53,203 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-02-17 23:00:53,204 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-02-17 23:00:53,205 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-02-17 23:00:53,205 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-02-17 23:00:53,207 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-02-17 23:00:53,207 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.02 11:00:53" (1/1) ... [2023-02-17 23:00:53,208 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@349977b0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 11:00:53, skipping insertion in model container [2023-02-17 23:00:53,208 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.02 11:00:53" (1/1) ... [2023-02-17 23:00:53,213 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-02-17 23:00:53,231 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-02-17 23:00:53,443 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/forester-heap/sll-rb-sentinel-1.i[22534,22547] [2023-02-17 23:00:53,448 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/forester-heap/sll-rb-sentinel-1.i[22606,22619] [2023-02-17 23:00:53,450 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/forester-heap/sll-rb-sentinel-1.i[22746,22759] [2023-02-17 23:00:53,451 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/forester-heap/sll-rb-sentinel-1.i[22820,22833] [2023-02-17 23:00:53,457 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-17 23:00:53,474 INFO L203 MainTranslator]: Completed pre-run [2023-02-17 23:00:53,506 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/forester-heap/sll-rb-sentinel-1.i[22534,22547] [2023-02-17 23:00:53,508 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/forester-heap/sll-rb-sentinel-1.i[22606,22619] [2023-02-17 23:00:53,509 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/forester-heap/sll-rb-sentinel-1.i[22746,22759] [2023-02-17 23:00:53,510 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/forester-heap/sll-rb-sentinel-1.i[22820,22833] [2023-02-17 23:00:53,513 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-17 23:00:53,533 INFO L208 MainTranslator]: Completed translation [2023-02-17 23:00:53,533 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 11:00:53 WrapperNode [2023-02-17 23:00:53,534 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-02-17 23:00:53,534 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-02-17 23:00:53,535 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-02-17 23:00:53,535 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-02-17 23:00:53,539 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 11:00:53" (1/1) ... [2023-02-17 23:00:53,557 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 11:00:53" (1/1) ... [2023-02-17 23:00:53,570 INFO L138 Inliner]: procedures = 119, calls = 36, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 122 [2023-02-17 23:00:53,577 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-02-17 23:00:53,578 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-02-17 23:00:53,581 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-02-17 23:00:53,581 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-02-17 23:00:53,587 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 11:00:53" (1/1) ... [2023-02-17 23:00:53,587 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 11:00:53" (1/1) ... [2023-02-17 23:00:53,603 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 11:00:53" (1/1) ... [2023-02-17 23:00:53,603 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 11:00:53" (1/1) ... [2023-02-17 23:00:53,616 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 11:00:53" (1/1) ... [2023-02-17 23:00:53,619 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 11:00:53" (1/1) ... [2023-02-17 23:00:53,620 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 11:00:53" (1/1) ... [2023-02-17 23:00:53,621 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 11:00:53" (1/1) ... [2023-02-17 23:00:53,622 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-02-17 23:00:53,623 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-02-17 23:00:53,623 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-02-17 23:00:53,623 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-02-17 23:00:53,624 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 11:00:53" (1/1) ... [2023-02-17 23:00:53,628 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-17 23:00:53,637 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 23:00:53,653 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-02-17 23:00:53,669 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-02-17 23:00:53,679 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-02-17 23:00:53,679 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-02-17 23:00:53,680 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-02-17 23:00:53,680 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-02-17 23:00:53,680 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-02-17 23:00:53,680 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-02-17 23:00:53,680 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-02-17 23:00:53,680 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-02-17 23:00:53,680 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-02-17 23:00:53,680 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-02-17 23:00:53,749 INFO L235 CfgBuilder]: Building ICFG [2023-02-17 23:00:53,751 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2023-02-17 23:00:53,946 INFO L276 CfgBuilder]: Performing block encoding [2023-02-17 23:00:53,950 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-02-17 23:00:53,950 INFO L300 CfgBuilder]: Removed 11 assume(true) statements. [2023-02-17 23:00:53,951 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.02 11:00:53 BoogieIcfgContainer [2023-02-17 23:00:53,951 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-02-17 23:00:53,953 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-02-17 23:00:53,953 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-02-17 23:00:53,955 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-02-17 23:00:53,955 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.02 11:00:53" (1/3) ... [2023-02-17 23:00:53,955 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@544573a4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.02 11:00:53, skipping insertion in model container [2023-02-17 23:00:53,955 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 11:00:53" (2/3) ... [2023-02-17 23:00:53,955 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@544573a4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.02 11:00:53, skipping insertion in model container [2023-02-17 23:00:53,955 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.02 11:00:53" (3/3) ... [2023-02-17 23:00:53,956 INFO L112 eAbstractionObserver]: Analyzing ICFG sll-rb-sentinel-1.i [2023-02-17 23:00:53,981 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-02-17 23:00:53,982 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 4 error locations. [2023-02-17 23:00:54,057 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-02-17 23:00:54,063 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, 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;@6970a66b, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-02-17 23:00:54,064 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-02-17 23:00:54,066 INFO L276 IsEmpty]: Start isEmpty. Operand has 33 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 32 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 23:00:54,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2023-02-17 23:00:54,070 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 23:00:54,070 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2023-02-17 23:00:54,071 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-02-17 23:00:54,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 23:00:54,074 INFO L85 PathProgramCache]: Analyzing trace with hash 889968582, now seen corresponding path program 1 times [2023-02-17 23:00:54,080 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 23:00:54,080 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1632375869] [2023-02-17 23:00:54,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 23:00:54,081 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 23:00:54,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 23:00:54,264 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 23:00:54,264 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 23:00:54,264 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1632375869] [2023-02-17 23:00:54,267 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1632375869] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 23:00:54,267 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 23:00:54,268 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-02-17 23:00:54,269 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1960026936] [2023-02-17 23:00:54,269 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 23:00:54,271 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-02-17 23:00:54,272 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 23:00:54,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-02-17 23:00:54,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-02-17 23:00:54,298 INFO L87 Difference]: Start difference. First operand has 33 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 32 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 23:00:54,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 23:00:54,313 INFO L93 Difference]: Finished difference Result 61 states and 98 transitions. [2023-02-17 23:00:54,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-02-17 23:00:54,314 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2023-02-17 23:00:54,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 23:00:54,318 INFO L225 Difference]: With dead ends: 61 [2023-02-17 23:00:54,318 INFO L226 Difference]: Without dead ends: 27 [2023-02-17 23:00:54,320 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-02-17 23:00:54,323 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-17 23:00:54,324 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-17 23:00:54,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2023-02-17 23:00:54,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2023-02-17 23:00:54,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 23 states have (on average 1.3043478260869565) internal successors, (30), 26 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 23:00:54,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 30 transitions. [2023-02-17 23:00:54,345 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 30 transitions. Word has length 6 [2023-02-17 23:00:54,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 23:00:54,345 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 30 transitions. [2023-02-17 23:00:54,345 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 23:00:54,345 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 30 transitions. [2023-02-17 23:00:54,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-02-17 23:00:54,346 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 23:00:54,346 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-02-17 23:00:54,346 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-02-17 23:00:54,347 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-02-17 23:00:54,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 23:00:54,347 INFO L85 PathProgramCache]: Analyzing trace with hash 1806853233, now seen corresponding path program 1 times [2023-02-17 23:00:54,347 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 23:00:54,348 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1246268198] [2023-02-17 23:00:54,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 23:00:54,348 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 23:00:54,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 23:00:54,546 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 23:00:54,547 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 23:00:54,547 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1246268198] [2023-02-17 23:00:54,548 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1246268198] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 23:00:54,548 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 23:00:54,548 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-17 23:00:54,551 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1112123435] [2023-02-17 23:00:54,551 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 23:00:54,551 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-17 23:00:54,552 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 23:00:54,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-17 23:00:54,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-17 23:00:54,554 INFO L87 Difference]: Start difference. First operand 27 states and 30 transitions. Second operand has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 23:00:54,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 23:00:54,601 INFO L93 Difference]: Finished difference Result 33 states and 38 transitions. [2023-02-17 23:00:54,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-17 23:00:54,601 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2023-02-17 23:00:54,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 23:00:54,603 INFO L225 Difference]: With dead ends: 33 [2023-02-17 23:00:54,603 INFO L226 Difference]: Without dead ends: 31 [2023-02-17 23:00:54,604 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-02-17 23:00:54,607 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 41 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-17 23:00:54,607 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 29 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-17 23:00:54,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2023-02-17 23:00:54,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 25. [2023-02-17 23:00:54,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 22 states have (on average 1.2727272727272727) internal successors, (28), 24 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 23:00:54,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions. [2023-02-17 23:00:54,618 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 28 transitions. Word has length 7 [2023-02-17 23:00:54,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 23:00:54,618 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 28 transitions. [2023-02-17 23:00:54,619 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 23:00:54,619 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions. [2023-02-17 23:00:54,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-02-17 23:00:54,619 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 23:00:54,619 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 23:00:54,619 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-02-17 23:00:54,619 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-02-17 23:00:54,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 23:00:54,620 INFO L85 PathProgramCache]: Analyzing trace with hash -856511048, now seen corresponding path program 1 times [2023-02-17 23:00:54,620 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 23:00:54,620 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2032169409] [2023-02-17 23:00:54,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 23:00:54,620 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 23:00:54,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 23:00:54,762 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 23:00:54,762 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 23:00:54,762 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2032169409] [2023-02-17 23:00:54,763 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2032169409] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 23:00:54,763 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 23:00:54,763 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-17 23:00:54,763 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [255454862] [2023-02-17 23:00:54,763 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 23:00:54,763 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-17 23:00:54,763 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 23:00:54,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-17 23:00:54,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-02-17 23:00:54,764 INFO L87 Difference]: Start difference. First operand 25 states and 28 transitions. Second operand has 5 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 23:00:54,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 23:00:54,823 INFO L93 Difference]: Finished difference Result 50 states and 56 transitions. [2023-02-17 23:00:54,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-17 23:00:54,823 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2023-02-17 23:00:54,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 23:00:54,824 INFO L225 Difference]: With dead ends: 50 [2023-02-17 23:00:54,824 INFO L226 Difference]: Without dead ends: 48 [2023-02-17 23:00:54,824 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-02-17 23:00:54,825 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 32 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-17 23:00:54,825 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 53 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-17 23:00:54,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2023-02-17 23:00:54,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 32. [2023-02-17 23:00:54,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 29 states have (on average 1.2413793103448276) internal successors, (36), 31 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 23:00:54,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 36 transitions. [2023-02-17 23:00:54,830 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 36 transitions. Word has length 10 [2023-02-17 23:00:54,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 23:00:54,830 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 36 transitions. [2023-02-17 23:00:54,830 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 23:00:54,830 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 36 transitions. [2023-02-17 23:00:54,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-02-17 23:00:54,830 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 23:00:54,830 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 23:00:54,831 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-02-17 23:00:54,831 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-02-17 23:00:54,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 23:00:54,831 INFO L85 PathProgramCache]: Analyzing trace with hash 1594081566, now seen corresponding path program 1 times [2023-02-17 23:00:54,831 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 23:00:54,831 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2087131297] [2023-02-17 23:00:54,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 23:00:54,832 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 23:00:54,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 23:00:55,274 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 23:00:55,274 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 23:00:55,274 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2087131297] [2023-02-17 23:00:55,274 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2087131297] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 23:00:55,274 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1475351978] [2023-02-17 23:00:55,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 23:00:55,276 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 23:00:55,276 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 23:00:55,279 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-17 23:00:55,309 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-02-17 23:00:55,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 23:00:55,386 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 32 conjunts are in the unsatisfiable core [2023-02-17 23:00:55,392 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 23:00:55,430 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-02-17 23:00:55,435 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-17 23:00:55,437 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 25 [2023-02-17 23:00:55,472 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-17 23:00:55,475 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 26 [2023-02-17 23:00:55,480 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-17 23:00:55,480 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 32 [2023-02-17 23:00:55,485 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2023-02-17 23:00:55,489 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-17 23:00:55,490 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 39 [2023-02-17 23:00:55,530 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-17 23:00:55,530 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-17 23:00:55,531 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 35 [2023-02-17 23:00:55,535 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-17 23:00:55,535 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 38 [2023-02-17 23:00:55,563 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2023-02-17 23:00:55,564 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 23:00:55,564 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 23:00:55,648 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-17 23:00:55,649 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-17 23:00:55,649 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 34 [2023-02-17 23:00:55,653 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-17 23:00:55,654 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-17 23:00:55,654 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 23:00:55,655 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1475351978] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 23:00:55,655 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 23:00:55,655 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 15 [2023-02-17 23:00:55,655 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [814728449] [2023-02-17 23:00:55,655 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 23:00:55,655 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-02-17 23:00:55,655 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 23:00:55,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-02-17 23:00:55,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2023-02-17 23:00:55,656 INFO L87 Difference]: Start difference. First operand 32 states and 36 transitions. Second operand has 15 states, 15 states have (on average 2.066666666666667) internal successors, (31), 15 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 23:00:55,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 23:00:55,793 INFO L93 Difference]: Finished difference Result 38 states and 44 transitions. [2023-02-17 23:00:55,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-02-17 23:00:55,793 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.066666666666667) internal successors, (31), 15 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2023-02-17 23:00:55,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 23:00:55,794 INFO L225 Difference]: With dead ends: 38 [2023-02-17 23:00:55,794 INFO L226 Difference]: Without dead ends: 36 [2023-02-17 23:00:55,795 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=107, Invalid=273, Unknown=0, NotChecked=0, Total=380 [2023-02-17 23:00:55,795 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 86 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-17 23:00:55,795 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [86 Valid, 63 Invalid, 122 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 98 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-17 23:00:55,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2023-02-17 23:00:55,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 23. [2023-02-17 23:00:55,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 21 states have (on average 1.2380952380952381) internal successors, (26), 22 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 23:00:55,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 26 transitions. [2023-02-17 23:00:55,800 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 26 transitions. Word has length 13 [2023-02-17 23:00:55,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 23:00:55,801 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 26 transitions. [2023-02-17 23:00:55,801 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.066666666666667) internal successors, (31), 15 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 23:00:55,801 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 26 transitions. [2023-02-17 23:00:55,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-02-17 23:00:55,801 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 23:00:55,801 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 23:00:55,816 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-02-17 23:00:56,011 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 23:00:56,012 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-02-17 23:00:56,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 23:00:56,012 INFO L85 PathProgramCache]: Analyzing trace with hash -1689639521, now seen corresponding path program 1 times [2023-02-17 23:00:56,012 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 23:00:56,012 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [224273290] [2023-02-17 23:00:56,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 23:00:56,012 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 23:00:56,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 23:00:56,052 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 23:00:56,052 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 23:00:56,052 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [224273290] [2023-02-17 23:00:56,052 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [224273290] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 23:00:56,053 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 23:00:56,053 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-17 23:00:56,053 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [856520527] [2023-02-17 23:00:56,053 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 23:00:56,053 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-17 23:00:56,053 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 23:00:56,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-17 23:00:56,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-02-17 23:00:56,054 INFO L87 Difference]: Start difference. First operand 23 states and 26 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 23:00:56,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 23:00:56,099 INFO L93 Difference]: Finished difference Result 38 states and 43 transitions. [2023-02-17 23:00:56,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-02-17 23:00:56,099 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2023-02-17 23:00:56,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 23:00:56,100 INFO L225 Difference]: With dead ends: 38 [2023-02-17 23:00:56,100 INFO L226 Difference]: Without dead ends: 26 [2023-02-17 23:00:56,100 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 0 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-02-17 23:00:56,101 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 4 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-17 23:00:56,101 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 49 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-17 23:00:56,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2023-02-17 23:00:56,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 25. [2023-02-17 23:00:56,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 23 states have (on average 1.2173913043478262) internal successors, (28), 24 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 23:00:56,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions. [2023-02-17 23:00:56,106 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 28 transitions. Word has length 14 [2023-02-17 23:00:56,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 23:00:56,106 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 28 transitions. [2023-02-17 23:00:56,106 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 23:00:56,106 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions. [2023-02-17 23:00:56,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-02-17 23:00:56,106 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 23:00:56,106 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 23:00:56,106 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-02-17 23:00:56,106 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-02-17 23:00:56,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 23:00:56,107 INFO L85 PathProgramCache]: Analyzing trace with hash 2084817261, now seen corresponding path program 1 times [2023-02-17 23:00:56,107 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 23:00:56,107 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2109259002] [2023-02-17 23:00:56,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 23:00:56,107 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 23:00:56,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 23:00:56,209 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 23:00:56,209 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 23:00:56,209 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2109259002] [2023-02-17 23:00:56,209 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2109259002] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 23:00:56,210 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1541550057] [2023-02-17 23:00:56,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 23:00:56,210 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 23:00:56,210 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 23:00:56,211 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-17 23:00:56,235 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-02-17 23:00:56,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 23:00:56,282 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 21 conjunts are in the unsatisfiable core [2023-02-17 23:00:56,283 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 23:00:56,288 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-17 23:00:56,288 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 46 treesize of output 120 [2023-02-17 23:00:56,292 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-17 23:00:56,295 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 29 [2023-02-17 23:00:56,299 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-17 23:00:56,302 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 35 [2023-02-17 23:00:56,308 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 36 [2023-02-17 23:00:56,312 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-17 23:00:56,313 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2023-02-17 23:00:56,329 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-17 23:00:56,330 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 46 treesize of output 120 [2023-02-17 23:00:56,334 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-17 23:00:56,337 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 29 [2023-02-17 23:00:56,340 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-17 23:00:56,344 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 35 [2023-02-17 23:00:56,350 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-17 23:00:56,351 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 28 [2023-02-17 23:00:56,354 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-17 23:00:56,355 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2023-02-17 23:00:56,679 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-17 23:00:56,679 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 257 treesize of output 235 [2023-02-17 23:00:56,691 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-17 23:00:56,691 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 284 treesize of output 256 [2023-02-17 23:00:56,710 WARN L207 Elim1Store]: Array PQE input equivalent to false [2023-02-17 23:00:56,712 WARN L207 Elim1Store]: Array PQE input equivalent to false [2023-02-17 23:00:56,714 WARN L207 Elim1Store]: Array PQE input equivalent to false [2023-02-17 23:00:56,720 WARN L207 Elim1Store]: Array PQE input equivalent to false [2023-02-17 23:00:56,725 WARN L207 Elim1Store]: Array PQE input equivalent to false [2023-02-17 23:00:56,727 WARN L207 Elim1Store]: Array PQE input equivalent to false [2023-02-17 23:00:56,729 WARN L207 Elim1Store]: Array PQE input equivalent to false [2023-02-17 23:00:56,734 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2023-02-17 23:00:56,737 WARN L207 Elim1Store]: Array PQE input equivalent to false [2023-02-17 23:00:56,738 WARN L207 Elim1Store]: Array PQE input equivalent to false [2023-02-17 23:00:56,739 WARN L207 Elim1Store]: Array PQE input equivalent to false [2023-02-17 23:00:56,742 WARN L207 Elim1Store]: Array PQE input equivalent to false [2023-02-17 23:00:56,744 WARN L207 Elim1Store]: Array PQE input equivalent to false [2023-02-17 23:00:56,747 WARN L207 Elim1Store]: Array PQE input equivalent to false [2023-02-17 23:00:56,748 WARN L207 Elim1Store]: Array PQE input equivalent to false [2023-02-17 23:00:56,749 WARN L207 Elim1Store]: Array PQE input equivalent to false [2023-02-17 23:00:56,750 WARN L207 Elim1Store]: Array PQE input equivalent to false [2023-02-17 23:00:56,753 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 121 treesize of output 99 [2023-02-17 23:00:56,761 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-02-17 23:00:56,766 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 23:00:56,766 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 23:00:56,788 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 23:00:56,788 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1541550057] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 23:00:56,788 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 23:00:56,789 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2023-02-17 23:00:56,789 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1313122833] [2023-02-17 23:00:56,789 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 23:00:56,789 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-02-17 23:00:56,789 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 23:00:56,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-02-17 23:00:56,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2023-02-17 23:00:56,790 INFO L87 Difference]: Start difference. First operand 25 states and 28 transitions. Second operand has 10 states, 10 states have (on average 4.2) internal successors, (42), 10 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 23:00:57,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 23:00:57,024 INFO L93 Difference]: Finished difference Result 49 states and 54 transitions. [2023-02-17 23:00:57,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-02-17 23:00:57,025 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.2) internal successors, (42), 10 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2023-02-17 23:00:57,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 23:00:57,025 INFO L225 Difference]: With dead ends: 49 [2023-02-17 23:00:57,025 INFO L226 Difference]: Without dead ends: 27 [2023-02-17 23:00:57,025 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 28 SyntacticMatches, 3 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=109, Unknown=1, NotChecked=0, Total=156 [2023-02-17 23:00:57,026 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 14 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 6 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-17 23:00:57,026 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 85 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 59 Invalid, 5 Unknown, 0 Unchecked, 0.2s Time] [2023-02-17 23:00:57,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2023-02-17 23:00:57,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2023-02-17 23:00:57,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 25 states have (on average 1.2) internal successors, (30), 26 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 23:00:57,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 30 transitions. [2023-02-17 23:00:57,032 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 30 transitions. Word has length 17 [2023-02-17 23:00:57,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 23:00:57,032 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 30 transitions. [2023-02-17 23:00:57,032 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.2) internal successors, (42), 10 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 23:00:57,032 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 30 transitions. [2023-02-17 23:00:57,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-02-17 23:00:57,032 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 23:00:57,033 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 23:00:57,038 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-02-17 23:00:57,238 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-02-17 23:00:57,238 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-02-17 23:00:57,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 23:00:57,239 INFO L85 PathProgramCache]: Analyzing trace with hash -1088473273, now seen corresponding path program 1 times [2023-02-17 23:00:57,239 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 23:00:57,239 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1637247271] [2023-02-17 23:00:57,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 23:00:57,239 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 23:00:57,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 23:00:57,708 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 23:00:57,708 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 23:00:57,708 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1637247271] [2023-02-17 23:00:57,708 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1637247271] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 23:00:57,708 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1140789211] [2023-02-17 23:00:57,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 23:00:57,708 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 23:00:57,708 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 23:00:57,709 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-17 23:00:57,711 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-02-17 23:00:57,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 23:00:57,808 INFO L263 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 51 conjunts are in the unsatisfiable core [2023-02-17 23:00:57,811 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 23:00:57,815 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-17 23:00:57,815 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 25 [2023-02-17 23:00:57,829 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-17 23:00:57,829 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 36 treesize of output 89 [2023-02-17 23:00:57,833 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 14 [2023-02-17 23:00:57,841 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-02-17 23:00:57,846 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 14 [2023-02-17 23:00:57,848 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-02-17 23:00:57,873 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-17 23:00:57,873 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 162 treesize of output 194 [2023-02-17 23:00:57,878 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-17 23:00:57,879 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-17 23:00:57,879 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 23 [2023-02-17 23:00:57,883 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 34 [2023-02-17 23:00:57,888 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-17 23:00:57,888 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 114 treesize of output 144 [2023-02-17 23:00:57,905 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 697 treesize of output 553 [2023-02-17 23:00:58,184 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-02-17 23:00:58,413 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-17 23:00:58,417 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 48 select indices, 48 select index equivalence classes, 0 disjoint index pairs (out of 1128 index pairs), introduced 78 new quantified variables, introduced 1128 case distinctions, treesize of input 1564 treesize of output 9956