./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-examples/sorting_selectionsort_ground-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 2329fc70 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/array-examples/sorting_selectionsort_ground-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 5aa72773233f17156d62ec9c7729aefdd69e77cc68e9bdd6e006eaf36895d27a --- Real Ultimate output --- This is Ultimate 0.2.2-?-2329fc7 [2023-02-13 21:55:08,569 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-02-13 21:55:08,572 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-02-13 21:55:08,613 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-02-13 21:55:08,614 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-02-13 21:55:08,617 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-02-13 21:55:08,619 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-02-13 21:55:08,622 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-02-13 21:55:08,624 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-02-13 21:55:08,628 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-02-13 21:55:08,630 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-02-13 21:55:08,632 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-02-13 21:55:08,632 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-02-13 21:55:08,634 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-02-13 21:55:08,635 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-02-13 21:55:08,637 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-02-13 21:55:08,637 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-02-13 21:55:08,639 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-02-13 21:55:08,640 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-02-13 21:55:08,645 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-02-13 21:55:08,647 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-02-13 21:55:08,648 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-02-13 21:55:08,649 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-02-13 21:55:08,650 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-02-13 21:55:08,657 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-02-13 21:55:08,658 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-02-13 21:55:08,659 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-02-13 21:55:08,660 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-02-13 21:55:08,661 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-02-13 21:55:08,661 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-02-13 21:55:08,662 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-02-13 21:55:08,662 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-02-13 21:55:08,664 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-02-13 21:55:08,665 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-02-13 21:55:08,666 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-02-13 21:55:08,666 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-02-13 21:55:08,666 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-02-13 21:55:08,667 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-02-13 21:55:08,667 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-02-13 21:55:08,668 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-02-13 21:55:08,669 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-02-13 21:55:08,670 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-02-13 21:55:08,699 INFO L113 SettingsManager]: Loading preferences was successful [2023-02-13 21:55:08,699 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-02-13 21:55:08,700 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-02-13 21:55:08,700 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-02-13 21:55:08,701 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-02-13 21:55:08,701 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-02-13 21:55:08,702 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-02-13 21:55:08,702 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-02-13 21:55:08,702 INFO L138 SettingsManager]: * Use SBE=true [2023-02-13 21:55:08,703 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-02-13 21:55:08,703 INFO L138 SettingsManager]: * sizeof long=4 [2023-02-13 21:55:08,703 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-02-13 21:55:08,704 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-02-13 21:55:08,704 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-02-13 21:55:08,704 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-02-13 21:55:08,704 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-02-13 21:55:08,704 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-02-13 21:55:08,704 INFO L138 SettingsManager]: * sizeof long double=12 [2023-02-13 21:55:08,705 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-02-13 21:55:08,705 INFO L138 SettingsManager]: * Use constant arrays=true [2023-02-13 21:55:08,705 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-02-13 21:55:08,705 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-02-13 21:55:08,705 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-02-13 21:55:08,705 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-02-13 21:55:08,706 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-13 21:55:08,706 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-02-13 21:55:08,706 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-02-13 21:55:08,706 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-02-13 21:55:08,707 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-02-13 21:55:08,707 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-02-13 21:55:08,707 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-02-13 21:55:08,707 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-02-13 21:55:08,708 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-02-13 21:55:08,708 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-02-13 21:55:08,708 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-02-13 21:55:08,708 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5aa72773233f17156d62ec9c7729aefdd69e77cc68e9bdd6e006eaf36895d27a [2023-02-13 21:55:08,965 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-02-13 21:55:08,988 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-02-13 21:55:08,990 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-02-13 21:55:08,991 INFO L271 PluginConnector]: Initializing CDTParser... [2023-02-13 21:55:08,992 INFO L275 PluginConnector]: CDTParser initialized [2023-02-13 21:55:08,993 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-examples/sorting_selectionsort_ground-1.i [2023-02-13 21:55:10,132 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-02-13 21:55:10,310 INFO L351 CDTParser]: Found 1 translation units. [2023-02-13 21:55:10,311 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/sorting_selectionsort_ground-1.i [2023-02-13 21:55:10,317 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4ad0d3091/1ae7ae077b0a417fad8210965e846761/FLAGa0edd19b8 [2023-02-13 21:55:10,335 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4ad0d3091/1ae7ae077b0a417fad8210965e846761 [2023-02-13 21:55:10,337 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-02-13 21:55:10,339 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-02-13 21:55:10,342 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-02-13 21:55:10,342 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-02-13 21:55:10,345 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-02-13 21:55:10,346 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.02 09:55:10" (1/1) ... [2023-02-13 21:55:10,347 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6c37fbc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.02 09:55:10, skipping insertion in model container [2023-02-13 21:55:10,347 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.02 09:55:10" (1/1) ... [2023-02-13 21:55:10,353 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-02-13 21:55:10,369 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-02-13 21:55:10,510 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/array-examples/sorting_selectionsort_ground-1.i[823,836] [2023-02-13 21:55:10,540 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-13 21:55:10,549 INFO L203 MainTranslator]: Completed pre-run [2023-02-13 21:55:10,566 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/array-examples/sorting_selectionsort_ground-1.i[823,836] [2023-02-13 21:55:10,591 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-13 21:55:10,604 INFO L208 MainTranslator]: Completed translation [2023-02-13 21:55:10,605 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.02 09:55:10 WrapperNode [2023-02-13 21:55:10,605 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-02-13 21:55:10,606 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-02-13 21:55:10,607 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-02-13 21:55:10,607 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-02-13 21:55:10,612 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.02 09:55:10" (1/1) ... [2023-02-13 21:55:10,627 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.02 09:55:10" (1/1) ... [2023-02-13 21:55:10,651 INFO L138 Inliner]: procedures = 16, calls = 25, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 114 [2023-02-13 21:55:10,652 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-02-13 21:55:10,652 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-02-13 21:55:10,653 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-02-13 21:55:10,653 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-02-13 21:55:10,661 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.02 09:55:10" (1/1) ... [2023-02-13 21:55:10,661 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.02 09:55:10" (1/1) ... [2023-02-13 21:55:10,665 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.02 09:55:10" (1/1) ... [2023-02-13 21:55:10,666 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.02 09:55:10" (1/1) ... [2023-02-13 21:55:10,683 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.02 09:55:10" (1/1) ... [2023-02-13 21:55:10,688 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.02 09:55:10" (1/1) ... [2023-02-13 21:55:10,692 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.02 09:55:10" (1/1) ... [2023-02-13 21:55:10,693 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.02 09:55:10" (1/1) ... [2023-02-13 21:55:10,698 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-02-13 21:55:10,700 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-02-13 21:55:10,700 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-02-13 21:55:10,700 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-02-13 21:55:10,701 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.02 09:55:10" (1/1) ... [2023-02-13 21:55:10,707 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-13 21:55:10,716 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-13 21:55:10,734 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) [2023-02-13 21:55:10,753 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 [2023-02-13 21:55:10,774 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-02-13 21:55:10,775 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-02-13 21:55:10,775 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-02-13 21:55:10,775 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-02-13 21:55:10,775 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-02-13 21:55:10,775 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-02-13 21:55:10,776 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-02-13 21:55:10,776 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-02-13 21:55:10,776 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-02-13 21:55:10,776 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-02-13 21:55:10,873 INFO L235 CfgBuilder]: Building ICFG [2023-02-13 21:55:10,887 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2023-02-13 21:55:11,108 INFO L276 CfgBuilder]: Performing block encoding [2023-02-13 21:55:11,117 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-02-13 21:55:11,117 INFO L300 CfgBuilder]: Removed 8 assume(true) statements. [2023-02-13 21:55:11,119 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.02 09:55:11 BoogieIcfgContainer [2023-02-13 21:55:11,119 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-02-13 21:55:11,121 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-02-13 21:55:11,122 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-02-13 21:55:11,125 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-02-13 21:55:11,125 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.02 09:55:10" (1/3) ... [2023-02-13 21:55:11,126 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7dbd18b1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.02 09:55:11, skipping insertion in model container [2023-02-13 21:55:11,126 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.02 09:55:10" (2/3) ... [2023-02-13 21:55:11,127 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7dbd18b1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.02 09:55:11, skipping insertion in model container [2023-02-13 21:55:11,127 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.02 09:55:11" (3/3) ... [2023-02-13 21:55:11,128 INFO L112 eAbstractionObserver]: Analyzing ICFG sorting_selectionsort_ground-1.i [2023-02-13 21:55:11,144 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-02-13 21:55:11,144 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-02-13 21:55:11,198 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-02-13 21:55:11,205 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;@5e5614d0, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-02-13 21:55:11,206 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-02-13 21:55:11,210 INFO L276 IsEmpty]: Start isEmpty. Operand has 40 states, 34 states have (on average 1.588235294117647) internal successors, (54), 35 states have internal predecessors, (54), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-13 21:55:11,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-02-13 21:55:11,216 INFO L187 NwaCegarLoop]: Found error trace [2023-02-13 21:55:11,217 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-13 21:55:11,218 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-13 21:55:11,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-13 21:55:11,224 INFO L85 PathProgramCache]: Analyzing trace with hash -1922481208, now seen corresponding path program 1 times [2023-02-13 21:55:11,232 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-13 21:55:11,232 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1083670202] [2023-02-13 21:55:11,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-13 21:55:11,234 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-13 21:55:11,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 21:55:11,470 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-13 21:55:11,471 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-13 21:55:11,471 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1083670202] [2023-02-13 21:55:11,472 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1083670202] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-13 21:55:11,472 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-13 21:55:11,472 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-13 21:55:11,474 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [705124334] [2023-02-13 21:55:11,474 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-13 21:55:11,478 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-13 21:55:11,479 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-13 21:55:11,510 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-13 21:55:11,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-13 21:55:11,515 INFO L87 Difference]: Start difference. First operand has 40 states, 34 states have (on average 1.588235294117647) internal successors, (54), 35 states have internal predecessors, (54), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-13 21:55:11,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-13 21:55:11,569 INFO L93 Difference]: Finished difference Result 78 states and 121 transitions. [2023-02-13 21:55:11,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-13 21:55:11,571 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2023-02-13 21:55:11,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-13 21:55:11,580 INFO L225 Difference]: With dead ends: 78 [2023-02-13 21:55:11,580 INFO L226 Difference]: Without dead ends: 38 [2023-02-13 21:55:11,583 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-13 21:55:11,587 INFO L413 NwaCegarLoop]: 49 mSDtfsCounter, 1 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-13 21:55:11,588 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 96 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-13 21:55:11,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2023-02-13 21:55:11,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 37. [2023-02-13 21:55:11,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 32 states have (on average 1.3125) internal successors, (42), 32 states have internal predecessors, (42), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-13 21:55:11,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 48 transitions. [2023-02-13 21:55:11,625 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 48 transitions. Word has length 12 [2023-02-13 21:55:11,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-13 21:55:11,626 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 48 transitions. [2023-02-13 21:55:11,626 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-13 21:55:11,627 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 48 transitions. [2023-02-13 21:55:11,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-02-13 21:55:11,628 INFO L187 NwaCegarLoop]: Found error trace [2023-02-13 21:55:11,628 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-13 21:55:11,644 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-02-13 21:55:11,645 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-13 21:55:11,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-13 21:55:11,646 INFO L85 PathProgramCache]: Analyzing trace with hash -326095532, now seen corresponding path program 1 times [2023-02-13 21:55:11,646 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-13 21:55:11,646 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1077600044] [2023-02-13 21:55:11,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-13 21:55:11,647 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-13 21:55:11,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 21:55:11,766 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-13 21:55:11,766 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-13 21:55:11,766 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1077600044] [2023-02-13 21:55:11,767 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1077600044] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-13 21:55:11,767 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [444499136] [2023-02-13 21:55:11,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-13 21:55:11,767 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-13 21:55:11,767 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-13 21:55:11,777 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) [2023-02-13 21:55:11,803 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-02-13 21:55:11,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 21:55:11,837 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 2 conjunts are in the unsatisfiable core [2023-02-13 21:55:11,840 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-13 21:55:11,858 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-13 21:55:11,858 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-13 21:55:11,858 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [444499136] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-13 21:55:11,858 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-02-13 21:55:11,859 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-02-13 21:55:11,859 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [225525236] [2023-02-13 21:55:11,859 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-13 21:55:11,860 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-13 21:55:11,860 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-13 21:55:11,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-13 21:55:11,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-02-13 21:55:11,861 INFO L87 Difference]: Start difference. First operand 37 states and 48 transitions. Second operand has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-13 21:55:11,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-13 21:55:11,900 INFO L93 Difference]: Finished difference Result 68 states and 89 transitions. [2023-02-13 21:55:11,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-13 21:55:11,900 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2023-02-13 21:55:11,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-13 21:55:11,901 INFO L225 Difference]: With dead ends: 68 [2023-02-13 21:55:11,901 INFO L226 Difference]: Without dead ends: 55 [2023-02-13 21:55:11,902 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-02-13 21:55:11,903 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 24 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 72 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 [2023-02-13 21:55:11,903 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 72 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-13 21:55:11,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2023-02-13 21:55:11,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 38. [2023-02-13 21:55:11,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 33 states have (on average 1.303030303030303) internal successors, (43), 33 states have internal predecessors, (43), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-13 21:55:11,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 49 transitions. [2023-02-13 21:55:11,911 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 49 transitions. Word has length 14 [2023-02-13 21:55:11,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-13 21:55:11,911 INFO L495 AbstractCegarLoop]: Abstraction has 38 states and 49 transitions. [2023-02-13 21:55:11,911 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-13 21:55:11,911 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 49 transitions. [2023-02-13 21:55:11,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-02-13 21:55:11,912 INFO L187 NwaCegarLoop]: Found error trace [2023-02-13 21:55:11,912 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-13 21:55:11,921 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-02-13 21:55:12,117 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-13 21:55:12,118 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-13 21:55:12,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-13 21:55:12,119 INFO L85 PathProgramCache]: Analyzing trace with hash -916904651, now seen corresponding path program 1 times [2023-02-13 21:55:12,119 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-13 21:55:12,120 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1868458221] [2023-02-13 21:55:12,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-13 21:55:12,120 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-13 21:55:12,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 21:55:12,191 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-13 21:55:12,191 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-13 21:55:12,191 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1868458221] [2023-02-13 21:55:12,192 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1868458221] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-13 21:55:12,194 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1199498647] [2023-02-13 21:55:12,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-13 21:55:12,196 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-13 21:55:12,196 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-13 21:55:12,197 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) [2023-02-13 21:55:12,200 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-02-13 21:55:12,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 21:55:12,254 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 3 conjunts are in the unsatisfiable core [2023-02-13 21:55:12,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-13 21:55:12,296 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-13 21:55:12,296 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-13 21:55:12,335 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-13 21:55:12,335 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1199498647] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-13 21:55:12,335 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-13 21:55:12,335 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2023-02-13 21:55:12,336 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1239552654] [2023-02-13 21:55:12,336 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-13 21:55:12,336 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-02-13 21:55:12,337 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-13 21:55:12,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-02-13 21:55:12,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-02-13 21:55:12,338 INFO L87 Difference]: Start difference. First operand 38 states and 49 transitions. Second operand has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-13 21:55:12,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-13 21:55:12,368 INFO L93 Difference]: Finished difference Result 77 states and 101 transitions. [2023-02-13 21:55:12,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-13 21:55:12,369 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2023-02-13 21:55:12,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-13 21:55:12,370 INFO L225 Difference]: With dead ends: 77 [2023-02-13 21:55:12,372 INFO L226 Difference]: Without dead ends: 44 [2023-02-13 21:55:12,372 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-02-13 21:55:12,373 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 2 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-13 21:55:12,375 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 88 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-13 21:55:12,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2023-02-13 21:55:12,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2023-02-13 21:55:12,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 39 states have (on average 1.2564102564102564) internal successors, (49), 39 states have internal predecessors, (49), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-13 21:55:12,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 55 transitions. [2023-02-13 21:55:12,385 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 55 transitions. Word has length 16 [2023-02-13 21:55:12,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-13 21:55:12,385 INFO L495 AbstractCegarLoop]: Abstraction has 44 states and 55 transitions. [2023-02-13 21:55:12,386 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-13 21:55:12,386 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 55 transitions. [2023-02-13 21:55:12,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-02-13 21:55:12,389 INFO L187 NwaCegarLoop]: Found error trace [2023-02-13 21:55:12,389 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-13 21:55:12,397 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-02-13 21:55:12,594 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,SelfDestructingSolverStorable2 [2023-02-13 21:55:12,595 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-13 21:55:12,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-13 21:55:12,595 INFO L85 PathProgramCache]: Analyzing trace with hash 1414516411, now seen corresponding path program 2 times [2023-02-13 21:55:12,595 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-13 21:55:12,595 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1128072184] [2023-02-13 21:55:12,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-13 21:55:12,596 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-13 21:55:12,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 21:55:12,722 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-02-13 21:55:12,722 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-13 21:55:12,723 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1128072184] [2023-02-13 21:55:12,725 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1128072184] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-13 21:55:12,727 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-13 21:55:12,727 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-13 21:55:12,727 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [47005558] [2023-02-13 21:55:12,728 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-13 21:55:12,729 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-13 21:55:12,730 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-13 21:55:12,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-13 21:55:12,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-02-13 21:55:12,732 INFO L87 Difference]: Start difference. First operand 44 states and 55 transitions. Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-13 21:55:12,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-13 21:55:12,795 INFO L93 Difference]: Finished difference Result 95 states and 126 transitions. [2023-02-13 21:55:12,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-13 21:55:12,796 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2023-02-13 21:55:12,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-13 21:55:12,798 INFO L225 Difference]: With dead ends: 95 [2023-02-13 21:55:12,798 INFO L226 Difference]: Without dead ends: 64 [2023-02-13 21:55:12,799 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-02-13 21:55:12,800 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 30 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-13 21:55:12,801 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 81 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-13 21:55:12,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2023-02-13 21:55:12,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 45. [2023-02-13 21:55:12,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 40 states have (on average 1.25) internal successors, (50), 40 states have internal predecessors, (50), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-13 21:55:12,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 56 transitions. [2023-02-13 21:55:12,815 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 56 transitions. Word has length 22 [2023-02-13 21:55:12,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-13 21:55:12,816 INFO L495 AbstractCegarLoop]: Abstraction has 45 states and 56 transitions. [2023-02-13 21:55:12,816 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-13 21:55:12,816 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 56 transitions. [2023-02-13 21:55:12,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-02-13 21:55:12,817 INFO L187 NwaCegarLoop]: Found error trace [2023-02-13 21:55:12,818 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-13 21:55:12,818 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-02-13 21:55:12,818 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-13 21:55:12,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-13 21:55:12,820 INFO L85 PathProgramCache]: Analyzing trace with hash -1079334847, now seen corresponding path program 1 times [2023-02-13 21:55:12,820 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-13 21:55:12,822 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [653487605] [2023-02-13 21:55:12,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-13 21:55:12,824 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-13 21:55:12,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 21:55:12,948 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-02-13 21:55:12,948 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-13 21:55:12,948 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [653487605] [2023-02-13 21:55:12,948 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [653487605] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-13 21:55:12,949 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-13 21:55:12,954 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-13 21:55:12,954 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1784286272] [2023-02-13 21:55:12,955 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-13 21:55:12,956 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-13 21:55:12,956 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-13 21:55:12,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-13 21:55:12,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-02-13 21:55:12,957 INFO L87 Difference]: Start difference. First operand 45 states and 56 transitions. Second operand has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-13 21:55:13,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-13 21:55:13,016 INFO L93 Difference]: Finished difference Result 92 states and 121 transitions. [2023-02-13 21:55:13,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-13 21:55:13,017 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2023-02-13 21:55:13,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-13 21:55:13,018 INFO L225 Difference]: With dead ends: 92 [2023-02-13 21:55:13,018 INFO L226 Difference]: Without dead ends: 61 [2023-02-13 21:55:13,018 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-02-13 21:55:13,019 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 17 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-13 21:55:13,019 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 83 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-13 21:55:13,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2023-02-13 21:55:13,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 53. [2023-02-13 21:55:13,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 48 states have (on average 1.2708333333333333) internal successors, (61), 48 states have internal predecessors, (61), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-13 21:55:13,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 67 transitions. [2023-02-13 21:55:13,026 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 67 transitions. Word has length 25 [2023-02-13 21:55:13,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-13 21:55:13,027 INFO L495 AbstractCegarLoop]: Abstraction has 53 states and 67 transitions. [2023-02-13 21:55:13,027 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-13 21:55:13,027 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 67 transitions. [2023-02-13 21:55:13,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-02-13 21:55:13,028 INFO L187 NwaCegarLoop]: Found error trace [2023-02-13 21:55:13,028 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-13 21:55:13,028 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-02-13 21:55:13,028 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-13 21:55:13,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-13 21:55:13,029 INFO L85 PathProgramCache]: Analyzing trace with hash -581508620, now seen corresponding path program 1 times [2023-02-13 21:55:13,029 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-13 21:55:13,029 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [343188449] [2023-02-13 21:55:13,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-13 21:55:13,030 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-13 21:55:13,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 21:55:13,117 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-13 21:55:13,118 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-13 21:55:13,118 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [343188449] [2023-02-13 21:55:13,118 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [343188449] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-13 21:55:13,118 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1241710289] [2023-02-13 21:55:13,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-13 21:55:13,119 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-13 21:55:13,119 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-13 21:55:13,120 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) [2023-02-13 21:55:13,132 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-02-13 21:55:13,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 21:55:13,193 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 6 conjunts are in the unsatisfiable core [2023-02-13 21:55:13,196 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-13 21:55:13,234 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-13 21:55:13,235 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-13 21:55:13,307 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-13 21:55:13,307 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1241710289] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-13 21:55:13,308 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-13 21:55:13,308 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2023-02-13 21:55:13,308 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [944407912] [2023-02-13 21:55:13,308 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-13 21:55:13,309 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-02-13 21:55:13,309 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-13 21:55:13,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-02-13 21:55:13,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2023-02-13 21:55:13,311 INFO L87 Difference]: Start difference. First operand 53 states and 67 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-13 21:55:13,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-13 21:55:13,355 INFO L93 Difference]: Finished difference Result 107 states and 140 transitions. [2023-02-13 21:55:13,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-02-13 21:55:13,356 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2023-02-13 21:55:13,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-13 21:55:13,357 INFO L225 Difference]: With dead ends: 107 [2023-02-13 21:55:13,357 INFO L226 Difference]: Without dead ends: 65 [2023-02-13 21:55:13,358 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2023-02-13 21:55:13,358 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 2 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 131 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-13 21:55:13,358 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 131 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-13 21:55:13,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2023-02-13 21:55:13,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2023-02-13 21:55:13,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 60 states have (on average 1.2166666666666666) internal successors, (73), 60 states have internal predecessors, (73), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-13 21:55:13,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 79 transitions. [2023-02-13 21:55:13,372 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 79 transitions. Word has length 26 [2023-02-13 21:55:13,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-13 21:55:13,372 INFO L495 AbstractCegarLoop]: Abstraction has 65 states and 79 transitions. [2023-02-13 21:55:13,372 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-13 21:55:13,373 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 79 transitions. [2023-02-13 21:55:13,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2023-02-13 21:55:13,373 INFO L187 NwaCegarLoop]: Found error trace [2023-02-13 21:55:13,373 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-13 21:55:13,379 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-02-13 21:55:13,574 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-13 21:55:13,574 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-13 21:55:13,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-13 21:55:13,575 INFO L85 PathProgramCache]: Analyzing trace with hash -772621952, now seen corresponding path program 2 times [2023-02-13 21:55:13,575 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-13 21:55:13,575 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [850303797] [2023-02-13 21:55:13,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-13 21:55:13,576 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-13 21:55:13,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 21:55:13,803 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-13 21:55:13,804 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-13 21:55:13,804 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [850303797] [2023-02-13 21:55:13,804 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [850303797] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-13 21:55:13,804 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1468255336] [2023-02-13 21:55:13,804 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-13 21:55:13,805 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-13 21:55:13,805 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-13 21:55:13,809 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-13 21:55:13,825 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-02-13 21:55:13,866 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-02-13 21:55:13,866 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-13 21:55:13,867 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 14 conjunts are in the unsatisfiable core [2023-02-13 21:55:13,869 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-13 21:55:13,993 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 [2023-02-13 21:55:14,036 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 101 trivial. 0 not checked. [2023-02-13 21:55:14,037 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-13 21:55:14,037 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1468255336] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-13 21:55:14,037 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-02-13 21:55:14,037 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [13] total 19 [2023-02-13 21:55:14,037 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1018185480] [2023-02-13 21:55:14,038 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-13 21:55:14,039 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-02-13 21:55:14,040 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-13 21:55:14,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-02-13 21:55:14,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=249, Unknown=0, NotChecked=0, Total=342 [2023-02-13 21:55:14,041 INFO L87 Difference]: Start difference. First operand 65 states and 79 transitions. Second operand has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-13 21:55:14,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-13 21:55:14,165 INFO L93 Difference]: Finished difference Result 79 states and 95 transitions. [2023-02-13 21:55:14,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-02-13 21:55:14,166 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2023-02-13 21:55:14,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-13 21:55:14,167 INFO L225 Difference]: With dead ends: 79 [2023-02-13 21:55:14,170 INFO L226 Difference]: Without dead ends: 77 [2023-02-13 21:55:14,170 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=103, Invalid=317, Unknown=0, NotChecked=0, Total=420 [2023-02-13 21:55:14,171 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 58 mSDsluCounter, 134 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 169 SdHoareTripleChecker+Invalid, 113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-13 21:55:14,171 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [62 Valid, 169 Invalid, 113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-13 21:55:14,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2023-02-13 21:55:14,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 70. [2023-02-13 21:55:14,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 63 states have (on average 1.2063492063492063) internal successors, (76), 64 states have internal predecessors, (76), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2023-02-13 21:55:14,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 84 transitions. [2023-02-13 21:55:14,179 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 84 transitions. Word has length 38 [2023-02-13 21:55:14,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-13 21:55:14,180 INFO L495 AbstractCegarLoop]: Abstraction has 70 states and 84 transitions. [2023-02-13 21:55:14,180 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-13 21:55:14,180 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 84 transitions. [2023-02-13 21:55:14,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2023-02-13 21:55:14,184 INFO L187 NwaCegarLoop]: Found error trace [2023-02-13 21:55:14,184 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-13 21:55:14,193 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-02-13 21:55:14,389 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-13 21:55:14,390 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-13 21:55:14,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-13 21:55:14,390 INFO L85 PathProgramCache]: Analyzing trace with hash -602796711, now seen corresponding path program 1 times [2023-02-13 21:55:14,390 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-13 21:55:14,390 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [196966275] [2023-02-13 21:55:14,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-13 21:55:14,390 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-13 21:55:14,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 21:55:14,628 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2023-02-13 21:55:14,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 21:55:14,632 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 2 proven. 100 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-02-13 21:55:14,632 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-13 21:55:14,632 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [196966275] [2023-02-13 21:55:14,632 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [196966275] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-13 21:55:14,633 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1820776686] [2023-02-13 21:55:14,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-13 21:55:14,633 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-13 21:55:14,633 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-13 21:55:14,637 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-13 21:55:14,664 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-02-13 21:55:14,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 21:55:14,723 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 12 conjunts are in the unsatisfiable core [2023-02-13 21:55:14,726 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-13 21:55:14,764 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-02-13 21:55:14,764 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-13 21:55:14,967 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 2 proven. 100 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-02-13 21:55:14,967 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1820776686] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-13 21:55:14,967 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-13 21:55:14,967 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 25 [2023-02-13 21:55:14,967 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [34731276] [2023-02-13 21:55:14,968 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-13 21:55:14,968 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-02-13 21:55:14,968 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-13 21:55:14,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-02-13 21:55:14,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2023-02-13 21:55:14,970 INFO L87 Difference]: Start difference. First operand 70 states and 84 transitions. Second operand has 25 states, 25 states have (on average 2.76) internal successors, (69), 25 states have internal predecessors, (69), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-13 21:55:15,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-13 21:55:15,031 INFO L93 Difference]: Finished difference Result 141 states and 180 transitions. [2023-02-13 21:55:15,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-02-13 21:55:15,031 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.76) internal successors, (69), 25 states have internal predecessors, (69), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 46 [2023-02-13 21:55:15,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-13 21:55:15,033 INFO L225 Difference]: With dead ends: 141 [2023-02-13 21:55:15,033 INFO L226 Difference]: Without dead ends: 94 [2023-02-13 21:55:15,034 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2023-02-13 21:55:15,035 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 2 mSDsluCounter, 129 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 174 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-13 21:55:15,035 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 174 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-13 21:55:15,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2023-02-13 21:55:15,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 94. [2023-02-13 21:55:15,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 87 states have (on average 1.1494252873563218) internal successors, (100), 88 states have internal predecessors, (100), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2023-02-13 21:55:15,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 108 transitions. [2023-02-13 21:55:15,044 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 108 transitions. Word has length 46 [2023-02-13 21:55:15,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-13 21:55:15,045 INFO L495 AbstractCegarLoop]: Abstraction has 94 states and 108 transitions. [2023-02-13 21:55:15,045 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.76) internal successors, (69), 25 states have internal predecessors, (69), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-13 21:55:15,045 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 108 transitions. [2023-02-13 21:55:15,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2023-02-13 21:55:15,046 INFO L187 NwaCegarLoop]: Found error trace [2023-02-13 21:55:15,046 INFO L195 NwaCegarLoop]: trace histogram [22, 22, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-13 21:55:15,055 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-02-13 21:55:15,251 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-13 21:55:15,252 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-13 21:55:15,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-13 21:55:15,252 INFO L85 PathProgramCache]: Analyzing trace with hash -1736618383, now seen corresponding path program 2 times [2023-02-13 21:55:15,253 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-13 21:55:15,253 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1691340690] [2023-02-13 21:55:15,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-13 21:55:15,253 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-13 21:55:15,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 21:55:15,863 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2023-02-13 21:55:15,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 21:55:15,870 INFO L134 CoverageAnalysis]: Checked inductivity of 489 backedges. 2 proven. 484 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-02-13 21:55:15,870 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-13 21:55:15,870 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1691340690] [2023-02-13 21:55:15,870 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1691340690] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-13 21:55:15,870 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1695762642] [2023-02-13 21:55:15,871 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-13 21:55:15,871 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-13 21:55:15,871 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-13 21:55:15,873 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-13 21:55:15,898 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-02-13 21:55:15,986 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-13 21:55:15,986 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-13 21:55:15,988 INFO L263 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 24 conjunts are in the unsatisfiable core [2023-02-13 21:55:15,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-13 21:55:16,065 INFO L134 CoverageAnalysis]: Checked inductivity of 489 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-02-13 21:55:16,065 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-13 21:55:16,770 INFO L134 CoverageAnalysis]: Checked inductivity of 489 backedges. 2 proven. 484 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-02-13 21:55:16,771 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1695762642] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-13 21:55:16,771 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-13 21:55:16,771 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 49 [2023-02-13 21:55:16,771 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [604178038] [2023-02-13 21:55:16,771 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-13 21:55:16,771 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2023-02-13 21:55:16,772 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-13 21:55:16,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2023-02-13 21:55:16,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2023-02-13 21:55:16,774 INFO L87 Difference]: Start difference. First operand 94 states and 108 transitions. Second operand has 49 states, 49 states have (on average 2.3877551020408165) internal successors, (117), 49 states have internal predecessors, (117), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-13 21:55:16,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-13 21:55:16,917 INFO L93 Difference]: Finished difference Result 189 states and 240 transitions. [2023-02-13 21:55:16,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2023-02-13 21:55:16,918 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 2.3877551020408165) internal successors, (117), 49 states have internal predecessors, (117), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 70 [2023-02-13 21:55:16,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-13 21:55:16,920 INFO L225 Difference]: With dead ends: 189 [2023-02-13 21:55:16,920 INFO L226 Difference]: Without dead ends: 142 [2023-02-13 21:55:16,922 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2023-02-13 21:55:16,924 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 2 mSDsluCounter, 215 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 260 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-13 21:55:16,924 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 260 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 100 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-13 21:55:16,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2023-02-13 21:55:16,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 142. [2023-02-13 21:55:16,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 135 states have (on average 1.0962962962962963) internal successors, (148), 136 states have internal predecessors, (148), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2023-02-13 21:55:16,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 156 transitions. [2023-02-13 21:55:16,949 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 156 transitions. Word has length 70 [2023-02-13 21:55:16,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-13 21:55:16,949 INFO L495 AbstractCegarLoop]: Abstraction has 142 states and 156 transitions. [2023-02-13 21:55:16,950 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 2.3877551020408165) internal successors, (117), 49 states have internal predecessors, (117), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-13 21:55:16,950 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 156 transitions. [2023-02-13 21:55:16,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2023-02-13 21:55:16,953 INFO L187 NwaCegarLoop]: Found error trace [2023-02-13 21:55:16,953 INFO L195 NwaCegarLoop]: trace histogram [46, 46, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-13 21:55:16,965 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-02-13 21:55:17,161 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-13 21:55:17,161 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-13 21:55:17,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-13 21:55:17,162 INFO L85 PathProgramCache]: Analyzing trace with hash 728266913, now seen corresponding path program 3 times [2023-02-13 21:55:17,162 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-13 21:55:17,162 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1753494736] [2023-02-13 21:55:17,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-13 21:55:17,162 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-13 21:55:17,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 21:55:18,909 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2023-02-13 21:55:18,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 21:55:18,912 INFO L134 CoverageAnalysis]: Checked inductivity of 2121 backedges. 2 proven. 2116 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-02-13 21:55:18,913 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-13 21:55:18,913 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1753494736] [2023-02-13 21:55:18,913 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1753494736] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-13 21:55:18,913 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1976876925] [2023-02-13 21:55:18,913 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-13 21:55:18,913 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-13 21:55:18,913 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-13 21:55:18,921 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-13 21:55:18,948 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-02-13 21:55:19,019 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-02-13 21:55:19,019 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-13 21:55:19,020 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 3 conjunts are in the unsatisfiable core [2023-02-13 21:55:19,030 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-13 21:55:19,090 INFO L134 CoverageAnalysis]: Checked inductivity of 2121 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2120 trivial. 0 not checked. [2023-02-13 21:55:19,090 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-13 21:55:19,150 INFO L134 CoverageAnalysis]: Checked inductivity of 2121 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 2118 trivial. 0 not checked. [2023-02-13 21:55:19,150 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1976876925] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-13 21:55:19,150 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-13 21:55:19,151 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 4, 4] total 51 [2023-02-13 21:55:19,152 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [258915403] [2023-02-13 21:55:19,153 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-13 21:55:19,153 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2023-02-13 21:55:19,154 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-13 21:55:19,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2023-02-13 21:55:19,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1180, Invalid=1370, Unknown=0, NotChecked=0, Total=2550 [2023-02-13 21:55:19,178 INFO L87 Difference]: Start difference. First operand 142 states and 156 transitions. Second operand has 51 states, 51 states have (on average 2.4901960784313726) internal successors, (127), 51 states have internal predecessors, (127), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-13 21:55:19,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-13 21:55:19,387 INFO L93 Difference]: Finished difference Result 218 states and 258 transitions. [2023-02-13 21:55:19,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2023-02-13 21:55:19,388 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 2.4901960784313726) internal successors, (127), 51 states have internal predecessors, (127), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 118 [2023-02-13 21:55:19,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-13 21:55:19,391 INFO L225 Difference]: With dead ends: 218 [2023-02-13 21:55:19,391 INFO L226 Difference]: Without dead ends: 171 [2023-02-13 21:55:19,393 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 286 GetRequests, 234 SyntacticMatches, 2 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1184, Invalid=1468, Unknown=0, NotChecked=0, Total=2652 [2023-02-13 21:55:19,393 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 44 mSDsluCounter, 313 mSDsCounter, 0 mSdLazyCounter, 264 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 353 SdHoareTripleChecker+Invalid, 270 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 264 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-13 21:55:19,394 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 353 Invalid, 270 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 264 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-13 21:55:19,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2023-02-13 21:55:19,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 152. [2023-02-13 21:55:19,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 145 states have (on average 1.1172413793103448) internal successors, (162), 146 states have internal predecessors, (162), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2023-02-13 21:55:19,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 170 transitions. [2023-02-13 21:55:19,403 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 170 transitions. Word has length 118 [2023-02-13 21:55:19,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-13 21:55:19,404 INFO L495 AbstractCegarLoop]: Abstraction has 152 states and 170 transitions. [2023-02-13 21:55:19,404 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 2.4901960784313726) internal successors, (127), 51 states have internal predecessors, (127), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-13 21:55:19,404 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 170 transitions. [2023-02-13 21:55:19,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2023-02-13 21:55:19,409 INFO L187 NwaCegarLoop]: Found error trace [2023-02-13 21:55:19,409 INFO L195 NwaCegarLoop]: trace histogram [47, 47, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-13 21:55:19,418 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-02-13 21:55:19,614 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-13 21:55:19,615 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-13 21:55:19,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-13 21:55:19,615 INFO L85 PathProgramCache]: Analyzing trace with hash -870454239, now seen corresponding path program 1 times [2023-02-13 21:55:19,615 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-13 21:55:19,616 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [149149969] [2023-02-13 21:55:19,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-13 21:55:19,616 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-13 21:55:19,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 21:55:21,242 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2023-02-13 21:55:21,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 21:55:21,246 INFO L134 CoverageAnalysis]: Checked inductivity of 2214 backedges. 2 proven. 2209 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-02-13 21:55:21,247 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-13 21:55:21,247 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [149149969] [2023-02-13 21:55:21,247 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [149149969] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-13 21:55:21,247 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1545908980] [2023-02-13 21:55:21,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-13 21:55:21,247 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-13 21:55:21,247 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-13 21:55:21,249 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-13 21:55:21,252 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-02-13 21:55:21,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 21:55:21,400 INFO L263 TraceCheckSpWp]: Trace formula consists of 524 conjuncts, 49 conjunts are in the unsatisfiable core [2023-02-13 21:55:21,405 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-13 21:55:21,545 INFO L134 CoverageAnalysis]: Checked inductivity of 2214 backedges. 0 proven. 2209 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-02-13 21:55:21,545 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-13 21:55:24,088 INFO L134 CoverageAnalysis]: Checked inductivity of 2214 backedges. 2 proven. 2209 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-02-13 21:55:24,088 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1545908980] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-13 21:55:24,088 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-13 21:55:24,089 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50, 50] total 99 [2023-02-13 21:55:24,089 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [770021123] [2023-02-13 21:55:24,089 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-13 21:55:24,090 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 99 states [2023-02-13 21:55:24,090 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-13 21:55:24,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 99 interpolants. [2023-02-13 21:55:24,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4851, Invalid=4851, Unknown=0, NotChecked=0, Total=9702 [2023-02-13 21:55:24,096 INFO L87 Difference]: Start difference. First operand 152 states and 170 transitions. Second operand has 99 states, 99 states have (on average 2.191919191919192) internal successors, (217), 99 states have internal predecessors, (217), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-13 21:55:24,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-13 21:55:24,349 INFO L93 Difference]: Finished difference Result 305 states and 389 transitions. [2023-02-13 21:55:24,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2023-02-13 21:55:24,350 INFO L78 Accepts]: Start accepts. Automaton has has 99 states, 99 states have (on average 2.191919191919192) internal successors, (217), 99 states have internal predecessors, (217), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 120 [2023-02-13 21:55:24,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-13 21:55:24,351 INFO L225 Difference]: With dead ends: 305 [2023-02-13 21:55:24,351 INFO L226 Difference]: Without dead ends: 250 [2023-02-13 21:55:24,355 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 290 GetRequests, 193 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=4851, Invalid=4851, Unknown=0, NotChecked=0, Total=9702 [2023-02-13 21:55:24,355 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 2 mSDsluCounter, 258 mSDsCounter, 0 mSdLazyCounter, 201 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 303 SdHoareTripleChecker+Invalid, 203 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 201 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-13 21:55:24,355 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 303 Invalid, 203 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 201 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-13 21:55:24,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2023-02-13 21:55:24,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 250. [2023-02-13 21:55:24,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 250 states, 243 states have (on average 1.0699588477366255) internal successors, (260), 244 states have internal predecessors, (260), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2023-02-13 21:55:24,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 268 transitions. [2023-02-13 21:55:24,368 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 268 transitions. Word has length 120 [2023-02-13 21:55:24,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-13 21:55:24,368 INFO L495 AbstractCegarLoop]: Abstraction has 250 states and 268 transitions. [2023-02-13 21:55:24,368 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 99 states, 99 states have (on average 2.191919191919192) internal successors, (217), 99 states have internal predecessors, (217), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-13 21:55:24,368 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 268 transitions. [2023-02-13 21:55:24,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2023-02-13 21:55:24,370 INFO L187 NwaCegarLoop]: Found error trace [2023-02-13 21:55:24,370 INFO L195 NwaCegarLoop]: trace histogram [96, 96, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-13 21:55:24,376 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-02-13 21:55:24,576 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-02-13 21:55:24,577 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-13 21:55:24,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-13 21:55:24,577 INFO L85 PathProgramCache]: Analyzing trace with hash -1106180221, now seen corresponding path program 2 times [2023-02-13 21:55:24,578 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-13 21:55:24,578 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1412948448] [2023-02-13 21:55:24,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-13 21:55:24,578 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-13 21:55:24,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 21:55:29,845 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 206 [2023-02-13 21:55:29,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 21:55:29,852 INFO L134 CoverageAnalysis]: Checked inductivity of 9221 backedges. 2 proven. 9216 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-02-13 21:55:29,852 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-13 21:55:29,852 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1412948448] [2023-02-13 21:55:29,853 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1412948448] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-13 21:55:29,853 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1973225861] [2023-02-13 21:55:29,853 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-13 21:55:29,853 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-13 21:55:29,853 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-13 21:55:29,857 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-13 21:55:29,862 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-02-13 21:55:30,122 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-13 21:55:30,122 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-13 21:55:30,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 965 conjuncts, 98 conjunts are in the unsatisfiable core [2023-02-13 21:55:30,136 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-13 21:55:30,438 INFO L134 CoverageAnalysis]: Checked inductivity of 9221 backedges. 0 proven. 9216 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-02-13 21:55:30,438 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-13 21:55:39,248 INFO L134 CoverageAnalysis]: Checked inductivity of 9221 backedges. 2 proven. 9216 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-02-13 21:55:39,249 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1973225861] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-13 21:55:39,249 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-13 21:55:39,249 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [99, 99, 99] total 197 [2023-02-13 21:55:39,249 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [3763144] [2023-02-13 21:55:39,249 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-13 21:55:39,250 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 197 states [2023-02-13 21:55:39,250 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-13 21:55:39,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 197 interpolants. [2023-02-13 21:55:39,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19306, Invalid=19306, Unknown=0, NotChecked=0, Total=38612 [2023-02-13 21:55:39,265 INFO L87 Difference]: Start difference. First operand 250 states and 268 transitions. Second operand has 197 states, 197 states have (on average 2.0964467005076144) internal successors, (413), 197 states have internal predecessors, (413), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-13 21:55:40,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-13 21:55:40,010 INFO L93 Difference]: Finished difference Result 501 states and 634 transitions. [2023-02-13 21:55:40,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 196 states. [2023-02-13 21:55:40,011 INFO L78 Accepts]: Start accepts. Automaton has has 197 states, 197 states have (on average 2.0964467005076144) internal successors, (413), 197 states have internal predecessors, (413), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 218 [2023-02-13 21:55:40,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-13 21:55:40,013 INFO L225 Difference]: With dead ends: 501 [2023-02-13 21:55:40,013 INFO L226 Difference]: Without dead ends: 446 [2023-02-13 21:55:40,017 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 535 GetRequests, 340 SyntacticMatches, 0 SemanticMatches, 195 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 384 ImplicationChecksByTransitivity, 11.4s TimeCoverageRelationStatistics Valid=19306, Invalid=19306, Unknown=0, NotChecked=0, Total=38612 [2023-02-13 21:55:40,018 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 2 mSDsluCounter, 129 mSDsCounter, 0 mSdLazyCounter, 394 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 174 SdHoareTripleChecker+Invalid, 396 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 394 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-13 21:55:40,018 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 174 Invalid, 396 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 394 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-13 21:55:40,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 446 states. [2023-02-13 21:55:40,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 446 to 446. [2023-02-13 21:55:40,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 446 states, 439 states have (on average 1.0387243735763099) internal successors, (456), 440 states have internal predecessors, (456), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2023-02-13 21:55:40,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 446 states to 446 states and 464 transitions. [2023-02-13 21:55:40,035 INFO L78 Accepts]: Start accepts. Automaton has 446 states and 464 transitions. Word has length 218 [2023-02-13 21:55:40,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-13 21:55:40,035 INFO L495 AbstractCegarLoop]: Abstraction has 446 states and 464 transitions. [2023-02-13 21:55:40,036 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 197 states, 197 states have (on average 2.0964467005076144) internal successors, (413), 197 states have internal predecessors, (413), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-13 21:55:40,036 INFO L276 IsEmpty]: Start isEmpty. Operand 446 states and 464 transitions. [2023-02-13 21:55:40,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 415 [2023-02-13 21:55:40,041 INFO L187 NwaCegarLoop]: Found error trace [2023-02-13 21:55:40,041 INFO L195 NwaCegarLoop]: trace histogram [194, 194, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-13 21:55:40,048 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-02-13 21:55:40,248 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-13 21:55:40,248 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-13 21:55:40,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-13 21:55:40,249 INFO L85 PathProgramCache]: Analyzing trace with hash -1565186873, now seen corresponding path program 3 times [2023-02-13 21:55:40,249 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-13 21:55:40,249 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [671932128] [2023-02-13 21:55:40,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-13 21:55:40,250 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-13 21:55:40,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 21:55:59,041 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 402 [2023-02-13 21:55:59,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 21:55:59,053 INFO L134 CoverageAnalysis]: Checked inductivity of 37641 backedges. 2 proven. 37636 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-02-13 21:55:59,053 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-13 21:55:59,053 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [671932128] [2023-02-13 21:55:59,053 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [671932128] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-13 21:55:59,054 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1908790511] [2023-02-13 21:55:59,054 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-13 21:55:59,054 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-13 21:55:59,054 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-13 21:55:59,055 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-13 21:55:59,058 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-02-13 21:55:59,284 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-02-13 21:55:59,285 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-13 21:55:59,286 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 4 conjunts are in the unsatisfiable core [2023-02-13 21:55:59,291 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-13 21:55:59,500 INFO L134 CoverageAnalysis]: Checked inductivity of 37641 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 37640 trivial. 0 not checked. [2023-02-13 21:55:59,500 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-13 21:55:59,741 INFO L134 CoverageAnalysis]: Checked inductivity of 37641 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 37638 trivial. 0 not checked. [2023-02-13 21:55:59,742 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1908790511] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-13 21:55:59,742 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-13 21:55:59,742 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [197, 5, 5] total 203 [2023-02-13 21:55:59,742 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [433252875] [2023-02-13 21:55:59,743 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-13 21:55:59,744 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 203 states [2023-02-13 21:55:59,744 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-13 21:55:59,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 203 interpolants. [2023-02-13 21:55:59,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19325, Invalid=21681, Unknown=0, NotChecked=0, Total=41006 [2023-02-13 21:55:59,754 INFO L87 Difference]: Start difference. First operand 446 states and 464 transitions. Second operand has 203 states, 203 states have (on average 2.1083743842364533) internal successors, (428), 203 states have internal predecessors, (428), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-13 21:56:13,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-13 21:56:13,802 INFO L93 Difference]: Finished difference Result 554 states and 618 transitions. [2023-02-13 21:56:13,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 206 states. [2023-02-13 21:56:13,803 INFO L78 Accepts]: Start accepts. Automaton has has 203 states, 203 states have (on average 2.1083743842364533) internal successors, (428), 203 states have internal predecessors, (428), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 414 [2023-02-13 21:56:13,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-13 21:56:13,805 INFO L225 Difference]: With dead ends: 554 [2023-02-13 21:56:13,806 INFO L226 Difference]: Without dead ends: 499 [2023-02-13 21:56:13,819 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1226 GetRequests, 824 SyntacticMatches, 0 SemanticMatches, 402 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21463 ImplicationChecksByTransitivity, 24.7s TimeCoverageRelationStatistics Valid=58179, Invalid=104633, Unknown=0, NotChecked=0, Total=162812 [2023-02-13 21:56:13,820 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 888 mSDsluCounter, 212 mSDsCounter, 0 mSdLazyCounter, 507 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 891 SdHoareTripleChecker+Valid, 248 SdHoareTripleChecker+Invalid, 516 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 507 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-02-13 21:56:13,820 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [891 Valid, 248 Invalid, 516 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 507 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-02-13 21:56:13,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 499 states. [2023-02-13 21:56:13,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 499 to 477. [2023-02-13 21:56:13,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 477 states, 469 states have (on average 1.0511727078891258) internal successors, (493), 470 states have internal predecessors, (493), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2023-02-13 21:56:13,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 477 states to 477 states and 503 transitions. [2023-02-13 21:56:13,839 INFO L78 Accepts]: Start accepts. Automaton has 477 states and 503 transitions. Word has length 414 [2023-02-13 21:56:13,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-13 21:56:13,839 INFO L495 AbstractCegarLoop]: Abstraction has 477 states and 503 transitions. [2023-02-13 21:56:13,840 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 203 states, 203 states have (on average 2.1083743842364533) internal successors, (428), 203 states have internal predecessors, (428), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-13 21:56:13,840 INFO L276 IsEmpty]: Start isEmpty. Operand 477 states and 503 transitions. [2023-02-13 21:56:13,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 426 [2023-02-13 21:56:13,845 INFO L187 NwaCegarLoop]: Found error trace [2023-02-13 21:56:13,845 INFO L195 NwaCegarLoop]: trace histogram [195, 195, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-13 21:56:13,850 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-02-13 21:56:14,050 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-02-13 21:56:14,051 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-13 21:56:14,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-13 21:56:14,051 INFO L85 PathProgramCache]: Analyzing trace with hash 1055751507, now seen corresponding path program 4 times [2023-02-13 21:56:14,051 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-13 21:56:14,051 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1878118981] [2023-02-13 21:56:14,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-13 21:56:14,052 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-13 21:56:14,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 21:56:32,416 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 413 [2023-02-13 21:56:32,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 21:56:32,422 INFO L134 CoverageAnalysis]: Checked inductivity of 38051 backedges. 2 proven. 38025 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-02-13 21:56:32,423 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-13 21:56:32,423 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1878118981] [2023-02-13 21:56:32,423 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1878118981] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-13 21:56:32,423 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1042357007] [2023-02-13 21:56:32,423 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-13 21:56:32,423 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-13 21:56:32,424 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-13 21:56:32,429 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-13 21:56:32,435 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-02-13 21:56:32,860 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-13 21:56:32,860 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-13 21:56:32,870 INFO L263 TraceCheckSpWp]: Trace formula consists of 1886 conjuncts, 197 conjunts are in the unsatisfiable core [2023-02-13 21:56:32,879 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-13 21:56:33,347 INFO L134 CoverageAnalysis]: Checked inductivity of 38051 backedges. 0 proven. 38025 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2023-02-13 21:56:33,347 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-13 21:57:07,972 INFO L134 CoverageAnalysis]: Checked inductivity of 38051 backedges. 2 proven. 38025 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-02-13 21:57:07,972 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1042357007] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-13 21:57:07,973 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-13 21:57:07,973 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [198, 198, 198] total 395 [2023-02-13 21:57:07,973 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [188895437] [2023-02-13 21:57:07,973 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-13 21:57:07,974 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 395 states [2023-02-13 21:57:07,975 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-13 21:57:07,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 395 interpolants. [2023-02-13 21:57:07,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77815, Invalid=77815, Unknown=0, NotChecked=0, Total=155630 [2023-02-13 21:57:07,996 INFO L87 Difference]: Start difference. First operand 477 states and 503 transitions. Second operand has 395 states, 395 states have (on average 2.0481012658227846) internal successors, (809), 395 states have internal predecessors, (809), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-13 21:57:11,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-13 21:57:11,265 INFO L93 Difference]: Finished difference Result 955 states and 1203 transitions. [2023-02-13 21:57:11,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 394 states. [2023-02-13 21:57:11,266 INFO L78 Accepts]: Start accepts. Automaton has has 395 states, 395 states have (on average 2.0481012658227846) internal successors, (809), 395 states have internal predecessors, (809), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 425 [2023-02-13 21:57:11,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-13 21:57:11,270 INFO L225 Difference]: With dead ends: 955 [2023-02-13 21:57:11,270 INFO L226 Difference]: Without dead ends: 871 [2023-02-13 21:57:11,276 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1048 GetRequests, 655 SyntacticMatches, 0 SemanticMatches, 393 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 780 ImplicationChecksByTransitivity, 45.3s TimeCoverageRelationStatistics Valid=77815, Invalid=77815, Unknown=0, NotChecked=0, Total=155630 [2023-02-13 21:57:11,277 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 2 mSDsluCounter, 516 mSDsCounter, 0 mSdLazyCounter, 799 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 561 SdHoareTripleChecker+Invalid, 801 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 799 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-02-13 21:57:11,277 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 561 Invalid, 801 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 799 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-02-13 21:57:11,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 871 states. [2023-02-13 21:57:11,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 871 to 871. [2023-02-13 21:57:11,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 871 states, 863 states have (on average 1.0278099652375434) internal successors, (887), 864 states have internal predecessors, (887), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2023-02-13 21:57:11,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 871 states to 871 states and 897 transitions. [2023-02-13 21:57:11,310 INFO L78 Accepts]: Start accepts. Automaton has 871 states and 897 transitions. Word has length 425 [2023-02-13 21:57:11,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-13 21:57:11,311 INFO L495 AbstractCegarLoop]: Abstraction has 871 states and 897 transitions. [2023-02-13 21:57:11,312 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 395 states, 395 states have (on average 2.0481012658227846) internal successors, (809), 395 states have internal predecessors, (809), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-13 21:57:11,312 INFO L276 IsEmpty]: Start isEmpty. Operand 871 states and 897 transitions. [2023-02-13 21:57:11,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 820 [2023-02-13 21:57:11,328 INFO L187 NwaCegarLoop]: Found error trace [2023-02-13 21:57:11,328 INFO L195 NwaCegarLoop]: trace histogram [392, 392, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-13 21:57:11,339 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-02-13 21:57:11,536 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-02-13 21:57:11,537 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-13 21:57:11,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-13 21:57:11,537 INFO L85 PathProgramCache]: Analyzing trace with hash -2116101367, now seen corresponding path program 5 times [2023-02-13 21:57:11,538 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-13 21:57:11,538 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1961493625] [2023-02-13 21:57:11,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-13 21:57:11,538 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-13 21:57:12,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 21:58:36,681 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 807 [2023-02-13 21:58:36,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 21:58:36,695 INFO L134 CoverageAnalysis]: Checked inductivity of 153690 backedges. 2 proven. 153664 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-02-13 21:58:36,695 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-13 21:58:36,695 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1961493625] [2023-02-13 21:58:36,695 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1961493625] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-13 21:58:36,696 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [809615410] [2023-02-13 21:58:36,696 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-13 21:58:36,696 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-13 21:58:36,696 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-13 21:58:36,698 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-13 21:58:36,699 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process