./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/list-properties/list_search-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 574ddb4e 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/list-properties/list_search-2.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 b1ea7ddff382751fa0e11562333bdb4981cac7bdbf1d356a007804e7e2e5a289 --- Real Ultimate output --- This is Ultimate 0.2.2-?-574ddb4 [2023-02-17 05:55:54,285 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-02-17 05:55:54,287 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-02-17 05:55:54,332 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-02-17 05:55:54,332 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-02-17 05:55:54,335 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-02-17 05:55:54,337 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-02-17 05:55:54,339 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-02-17 05:55:54,341 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-02-17 05:55:54,345 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-02-17 05:55:54,346 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-02-17 05:55:54,347 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-02-17 05:55:54,348 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-02-17 05:55:54,350 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-02-17 05:55:54,351 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-02-17 05:55:54,353 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-02-17 05:55:54,353 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-02-17 05:55:54,355 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-02-17 05:55:54,356 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-02-17 05:55:54,360 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-02-17 05:55:54,361 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-02-17 05:55:54,362 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-02-17 05:55:54,363 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-02-17 05:55:54,364 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-02-17 05:55:54,371 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-02-17 05:55:54,372 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-02-17 05:55:54,372 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-02-17 05:55:54,373 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-02-17 05:55:54,374 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-02-17 05:55:54,374 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-02-17 05:55:54,375 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-02-17 05:55:54,375 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-02-17 05:55:54,377 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-02-17 05:55:54,378 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-02-17 05:55:54,378 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-02-17 05:55:54,378 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-02-17 05:55:54,379 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-02-17 05:55:54,379 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-02-17 05:55:54,379 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-02-17 05:55:54,381 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-02-17 05:55:54,382 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-02-17 05:55:54,382 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-02-17 05:55:54,412 INFO L113 SettingsManager]: Loading preferences was successful [2023-02-17 05:55:54,412 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-02-17 05:55:54,413 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-02-17 05:55:54,413 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-02-17 05:55:54,415 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-02-17 05:55:54,415 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-02-17 05:55:54,415 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-02-17 05:55:54,416 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-02-17 05:55:54,416 INFO L138 SettingsManager]: * Use SBE=true [2023-02-17 05:55:54,416 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-02-17 05:55:54,417 INFO L138 SettingsManager]: * sizeof long=4 [2023-02-17 05:55:54,417 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-02-17 05:55:54,417 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-02-17 05:55:54,417 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-02-17 05:55:54,418 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-02-17 05:55:54,418 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-02-17 05:55:54,418 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-02-17 05:55:54,418 INFO L138 SettingsManager]: * sizeof long double=12 [2023-02-17 05:55:54,418 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-02-17 05:55:54,419 INFO L138 SettingsManager]: * Use constant arrays=true [2023-02-17 05:55:54,419 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-02-17 05:55:54,419 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-02-17 05:55:54,419 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-02-17 05:55:54,419 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-02-17 05:55:54,420 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-17 05:55:54,420 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-02-17 05:55:54,420 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-02-17 05:55:54,420 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-02-17 05:55:54,421 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-02-17 05:55:54,421 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-02-17 05:55:54,421 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-02-17 05:55:54,421 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-02-17 05:55:54,421 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-02-17 05:55:54,422 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-02-17 05:55:54,422 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-02-17 05:55:54,422 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b1ea7ddff382751fa0e11562333bdb4981cac7bdbf1d356a007804e7e2e5a289 [2023-02-17 05:55:54,644 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-02-17 05:55:54,664 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-02-17 05:55:54,667 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-02-17 05:55:54,668 INFO L271 PluginConnector]: Initializing CDTParser... [2023-02-17 05:55:54,668 INFO L275 PluginConnector]: CDTParser initialized [2023-02-17 05:55:54,669 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/list-properties/list_search-2.i [2023-02-17 05:55:55,777 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-02-17 05:55:56,006 INFO L351 CDTParser]: Found 1 translation units. [2023-02-17 05:55:56,007 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/list-properties/list_search-2.i [2023-02-17 05:55:56,022 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a8831cb8e/c85656df74964ffe9f3d56fd3ab7499f/FLAG8763029c6 [2023-02-17 05:55:56,043 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a8831cb8e/c85656df74964ffe9f3d56fd3ab7499f [2023-02-17 05:55:56,046 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-02-17 05:55:56,047 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-02-17 05:55:56,048 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-02-17 05:55:56,048 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-02-17 05:55:56,051 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-02-17 05:55:56,051 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.02 05:55:56" (1/1) ... [2023-02-17 05:55:56,052 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3e49a3f5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 05:55:56, skipping insertion in model container [2023-02-17 05:55:56,052 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.02 05:55:56" (1/1) ... [2023-02-17 05:55:56,058 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-02-17 05:55:56,108 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-02-17 05:55:56,219 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/list-properties/list_search-2.i[813,826] [2023-02-17 05:55:56,424 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-17 05:55:56,434 INFO L203 MainTranslator]: Completed pre-run [2023-02-17 05:55:56,447 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/list-properties/list_search-2.i[813,826] [2023-02-17 05:55:56,499 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-17 05:55:56,553 INFO L208 MainTranslator]: Completed translation [2023-02-17 05:55:56,554 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 05:55:56 WrapperNode [2023-02-17 05:55:56,554 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-02-17 05:55:56,555 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-02-17 05:55:56,555 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-02-17 05:55:56,555 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-02-17 05:55:56,561 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 05:55:56" (1/1) ... [2023-02-17 05:55:56,574 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 05:55:56" (1/1) ... [2023-02-17 05:55:56,601 INFO L138 Inliner]: procedures = 226, calls = 29, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 101 [2023-02-17 05:55:56,602 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-02-17 05:55:56,602 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-02-17 05:55:56,602 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-02-17 05:55:56,603 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-02-17 05:55:56,610 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 05:55:56" (1/1) ... [2023-02-17 05:55:56,611 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 05:55:56" (1/1) ... [2023-02-17 05:55:56,632 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 05:55:56" (1/1) ... [2023-02-17 05:55:56,632 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 05:55:56" (1/1) ... [2023-02-17 05:55:56,638 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 05:55:56" (1/1) ... [2023-02-17 05:55:56,653 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 05:55:56" (1/1) ... [2023-02-17 05:55:56,657 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 05:55:56" (1/1) ... [2023-02-17 05:55:56,663 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 05:55:56" (1/1) ... [2023-02-17 05:55:56,665 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-02-17 05:55:56,666 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-02-17 05:55:56,666 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-02-17 05:55:56,666 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-02-17 05:55:56,667 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 05:55:56" (1/1) ... [2023-02-17 05:55:56,676 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-17 05:55:56,686 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 05:55:56,706 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-02-17 05:55:56,732 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-02-17 05:55:56,748 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-02-17 05:55:56,748 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-02-17 05:55:56,748 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-02-17 05:55:56,749 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-02-17 05:55:56,749 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-02-17 05:55:56,749 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-02-17 05:55:56,749 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-02-17 05:55:56,749 INFO L130 BoogieDeclarations]: Found specification of procedure insert_list [2023-02-17 05:55:56,749 INFO L138 BoogieDeclarations]: Found implementation of procedure insert_list [2023-02-17 05:55:56,750 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-02-17 05:55:56,750 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-02-17 05:55:56,750 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-02-17 05:55:56,901 INFO L235 CfgBuilder]: Building ICFG [2023-02-17 05:55:56,902 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2023-02-17 05:55:57,078 INFO L276 CfgBuilder]: Performing block encoding [2023-02-17 05:55:57,084 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-02-17 05:55:57,085 INFO L300 CfgBuilder]: Removed 4 assume(true) statements. [2023-02-17 05:55:57,086 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.02 05:55:57 BoogieIcfgContainer [2023-02-17 05:55:57,086 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-02-17 05:55:57,089 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-02-17 05:55:57,089 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-02-17 05:55:57,091 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-02-17 05:55:57,092 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.02 05:55:56" (1/3) ... [2023-02-17 05:55:57,092 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@11e6bf42 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.02 05:55:57, skipping insertion in model container [2023-02-17 05:55:57,092 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 05:55:56" (2/3) ... [2023-02-17 05:55:57,093 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@11e6bf42 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.02 05:55:57, skipping insertion in model container [2023-02-17 05:55:57,093 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.02 05:55:57" (3/3) ... [2023-02-17 05:55:57,094 INFO L112 eAbstractionObserver]: Analyzing ICFG list_search-2.i [2023-02-17 05:55:57,111 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-02-17 05:55:57,111 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-02-17 05:55:57,169 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-02-17 05:55:57,178 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;@94cd95f, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-02-17 05:55:57,178 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-02-17 05:55:57,181 INFO L276 IsEmpty]: Start isEmpty. Operand has 36 states, 29 states have (on average 1.4482758620689655) internal successors, (42), 30 states have internal predecessors, (42), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-02-17 05:55:57,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2023-02-17 05:55:57,189 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 05:55:57,189 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 05:55:57,190 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 05:55:57,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 05:55:57,195 INFO L85 PathProgramCache]: Analyzing trace with hash 1135484681, now seen corresponding path program 1 times [2023-02-17 05:55:57,200 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 05:55:57,201 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [584909194] [2023-02-17 05:55:57,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 05:55:57,201 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 05:55:57,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 05:55:57,622 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-17 05:55:57,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 05:55:57,720 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-17 05:55:57,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 05:55:57,790 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-02-17 05:55:57,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 05:55:57,809 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2023-02-17 05:55:57,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 05:55:57,834 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-02-17 05:55:57,835 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 05:55:57,835 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [584909194] [2023-02-17 05:55:57,836 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [584909194] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 05:55:57,836 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1687286348] [2023-02-17 05:55:57,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 05:55:57,836 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 05:55:57,837 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 05:55:57,848 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-17 05:55:57,873 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-02-17 05:55:58,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 05:55:58,045 INFO L263 TraceCheckSpWp]: Trace formula consists of 367 conjuncts, 1 conjunts are in the unsatisfiable core [2023-02-17 05:55:58,050 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 05:55:58,064 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-02-17 05:55:58,064 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-17 05:55:58,065 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1687286348] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 05:55:58,065 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-02-17 05:55:58,065 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [7] total 7 [2023-02-17 05:55:58,067 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [853228493] [2023-02-17 05:55:58,068 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 05:55:58,071 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-02-17 05:55:58,071 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 05:55:58,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-02-17 05:55:58,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-02-17 05:55:58,097 INFO L87 Difference]: Start difference. First operand has 36 states, 29 states have (on average 1.4482758620689655) internal successors, (42), 30 states have internal predecessors, (42), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 2 states, 2 states have (on average 8.5) internal successors, (17), 2 states have internal predecessors, (17), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-02-17 05:55:58,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 05:55:58,116 INFO L93 Difference]: Finished difference Result 56 states and 78 transitions. [2023-02-17 05:55:58,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-02-17 05:55:58,117 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 8.5) internal successors, (17), 2 states have internal predecessors, (17), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 37 [2023-02-17 05:55:58,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 05:55:58,122 INFO L225 Difference]: With dead ends: 56 [2023-02-17 05:55:58,122 INFO L226 Difference]: Without dead ends: 25 [2023-02-17 05:55:58,124 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-02-17 05:55:58,128 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-17 05:55:58,129 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-17 05:55:58,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2023-02-17 05:55:58,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2023-02-17 05:55:58,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 19 states have internal predecessors, (23), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-02-17 05:55:58,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 31 transitions. [2023-02-17 05:55:58,164 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 31 transitions. Word has length 37 [2023-02-17 05:55:58,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 05:55:58,166 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 31 transitions. [2023-02-17 05:55:58,167 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 8.5) internal successors, (17), 2 states have internal predecessors, (17), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-02-17 05:55:58,167 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 31 transitions. [2023-02-17 05:55:58,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2023-02-17 05:55:58,170 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 05:55:58,170 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 05:55:58,181 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-02-17 05:55:58,377 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-02-17 05:55:58,377 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 05:55:58,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 05:55:58,378 INFO L85 PathProgramCache]: Analyzing trace with hash 1275349378, now seen corresponding path program 1 times [2023-02-17 05:55:58,378 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 05:55:58,378 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1829463295] [2023-02-17 05:55:58,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 05:55:58,379 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 05:55:58,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 05:55:58,508 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-17 05:55:58,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 05:55:58,558 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-17 05:55:58,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 05:55:58,595 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-02-17 05:55:58,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 05:55:58,625 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2023-02-17 05:55:58,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 05:55:58,639 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-02-17 05:55:58,639 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 05:55:58,640 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1829463295] [2023-02-17 05:55:58,643 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1829463295] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 05:55:58,643 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [948080940] [2023-02-17 05:55:58,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 05:55:58,649 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 05:55:58,649 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 05:55:58,651 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-17 05:55:58,679 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-02-17 05:55:58,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 05:55:58,807 INFO L263 TraceCheckSpWp]: Trace formula consists of 372 conjuncts, 9 conjunts are in the unsatisfiable core [2023-02-17 05:55:58,812 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 05:55:58,852 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 21 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-02-17 05:55:58,853 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 05:55:58,896 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 1 proven. 22 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-02-17 05:55:58,896 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [948080940] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 05:55:58,896 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 05:55:58,897 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 8 [2023-02-17 05:55:58,897 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [330972791] [2023-02-17 05:55:58,897 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 05:55:58,899 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-02-17 05:55:58,900 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 05:55:58,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-02-17 05:55:58,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2023-02-17 05:55:58,901 INFO L87 Difference]: Start difference. First operand 25 states and 31 transitions. Second operand has 8 states, 8 states have (on average 4.5) internal successors, (36), 7 states have internal predecessors, (36), 3 states have call successors, (11), 5 states have call predecessors, (11), 4 states have return successors, (6), 2 states have call predecessors, (6), 3 states have call successors, (6) [2023-02-17 05:55:58,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 05:55:58,997 INFO L93 Difference]: Finished difference Result 51 states and 65 transitions. [2023-02-17 05:55:58,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-02-17 05:55:58,998 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.5) internal successors, (36), 7 states have internal predecessors, (36), 3 states have call successors, (11), 5 states have call predecessors, (11), 4 states have return successors, (6), 2 states have call predecessors, (6), 3 states have call successors, (6) Word has length 39 [2023-02-17 05:55:58,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 05:55:59,000 INFO L225 Difference]: With dead ends: 51 [2023-02-17 05:55:59,000 INFO L226 Difference]: Without dead ends: 31 [2023-02-17 05:55:59,001 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 78 SyntacticMatches, 7 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2023-02-17 05:55:59,002 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 42 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-17 05:55:59,002 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 86 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-17 05:55:59,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2023-02-17 05:55:59,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 30. [2023-02-17 05:55:59,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 23 states have (on average 1.173913043478261) internal successors, (27), 23 states have internal predecessors, (27), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2023-02-17 05:55:59,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 36 transitions. [2023-02-17 05:55:59,008 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 36 transitions. Word has length 39 [2023-02-17 05:55:59,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 05:55:59,009 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 36 transitions. [2023-02-17 05:55:59,009 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.5) internal successors, (36), 7 states have internal predecessors, (36), 3 states have call successors, (11), 5 states have call predecessors, (11), 4 states have return successors, (6), 2 states have call predecessors, (6), 3 states have call successors, (6) [2023-02-17 05:55:59,009 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 36 transitions. [2023-02-17 05:55:59,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2023-02-17 05:55:59,010 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 05:55:59,011 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 05:55:59,020 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-02-17 05:55:59,218 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,SelfDestructingSolverStorable1 [2023-02-17 05:55:59,219 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 05:55:59,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 05:55:59,220 INFO L85 PathProgramCache]: Analyzing trace with hash 177460864, now seen corresponding path program 1 times [2023-02-17 05:55:59,220 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 05:55:59,224 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [463418212] [2023-02-17 05:55:59,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 05:55:59,224 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 05:55:59,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 05:55:59,304 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-17 05:55:59,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 05:55:59,311 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-17 05:55:59,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 05:55:59,319 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-02-17 05:55:59,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 05:55:59,326 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2023-02-17 05:55:59,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 05:55:59,355 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-02-17 05:55:59,355 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 05:55:59,356 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [463418212] [2023-02-17 05:55:59,356 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [463418212] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 05:55:59,356 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 05:55:59,356 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-02-17 05:55:59,356 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1145502596] [2023-02-17 05:55:59,357 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 05:55:59,357 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-02-17 05:55:59,357 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 05:55:59,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-17 05:55:59,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-02-17 05:55:59,358 INFO L87 Difference]: Start difference. First operand 30 states and 36 transitions. Second operand has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 1 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2023-02-17 05:55:59,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 05:55:59,421 INFO L93 Difference]: Finished difference Result 41 states and 49 transitions. [2023-02-17 05:55:59,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-02-17 05:55:59,421 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 1 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 39 [2023-02-17 05:55:59,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 05:55:59,423 INFO L225 Difference]: With dead ends: 41 [2023-02-17 05:55:59,424 INFO L226 Difference]: Without dead ends: 32 [2023-02-17 05:55:59,424 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2023-02-17 05:55:59,426 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 25 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-17 05:55:59,427 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 79 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-17 05:55:59,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2023-02-17 05:55:59,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 31. [2023-02-17 05:55:59,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 24 states have (on average 1.1666666666666667) internal successors, (28), 24 states have internal predecessors, (28), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2023-02-17 05:55:59,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 37 transitions. [2023-02-17 05:55:59,438 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 37 transitions. Word has length 39 [2023-02-17 05:55:59,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 05:55:59,439 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 37 transitions. [2023-02-17 05:55:59,439 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 1 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2023-02-17 05:55:59,439 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 37 transitions. [2023-02-17 05:55:59,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2023-02-17 05:55:59,440 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 05:55:59,440 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 05:55:59,440 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-02-17 05:55:59,441 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 05:55:59,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 05:55:59,441 INFO L85 PathProgramCache]: Analyzing trace with hash 104078038, now seen corresponding path program 1 times [2023-02-17 05:55:59,441 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 05:55:59,441 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2045858812] [2023-02-17 05:55:59,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 05:55:59,442 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 05:55:59,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 05:55:59,674 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-17 05:55:59,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 05:55:59,680 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-17 05:55:59,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 05:55:59,687 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-02-17 05:55:59,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 05:55:59,693 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2023-02-17 05:55:59,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 05:55:59,699 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2023-02-17 05:55:59,699 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 05:55:59,699 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2045858812] [2023-02-17 05:55:59,699 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2045858812] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 05:55:59,699 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 05:55:59,699 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-02-17 05:55:59,700 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [181836076] [2023-02-17 05:55:59,700 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 05:55:59,700 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-02-17 05:55:59,700 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 05:55:59,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-02-17 05:55:59,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2023-02-17 05:55:59,701 INFO L87 Difference]: Start difference. First operand 31 states and 37 transitions. Second operand has 8 states, 8 states have (on average 2.625) internal successors, (21), 7 states have internal predecessors, (21), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-02-17 05:55:59,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 05:55:59,752 INFO L93 Difference]: Finished difference Result 37 states and 43 transitions. [2023-02-17 05:55:59,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-02-17 05:55:59,752 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 7 states have internal predecessors, (21), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 40 [2023-02-17 05:55:59,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 05:55:59,753 INFO L225 Difference]: With dead ends: 37 [2023-02-17 05:55:59,753 INFO L226 Difference]: Without dead ends: 32 [2023-02-17 05:55:59,754 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2023-02-17 05:55:59,755 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 17 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-17 05:55:59,755 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 123 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-17 05:55:59,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2023-02-17 05:55:59,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2023-02-17 05:55:59,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 25 states have (on average 1.16) internal successors, (29), 25 states have internal predecessors, (29), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2023-02-17 05:55:59,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 38 transitions. [2023-02-17 05:55:59,760 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 38 transitions. Word has length 40 [2023-02-17 05:55:59,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 05:55:59,760 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 38 transitions. [2023-02-17 05:55:59,761 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 7 states have internal predecessors, (21), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-02-17 05:55:59,761 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 38 transitions. [2023-02-17 05:55:59,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2023-02-17 05:55:59,762 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 05:55:59,762 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 05:55:59,762 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-02-17 05:55:59,762 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 05:55:59,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 05:55:59,763 INFO L85 PathProgramCache]: Analyzing trace with hash 161336340, now seen corresponding path program 1 times [2023-02-17 05:55:59,763 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 05:55:59,763 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1987264720] [2023-02-17 05:55:59,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 05:55:59,764 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 05:55:59,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 05:55:59,852 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-17 05:55:59,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 05:55:59,858 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-17 05:55:59,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 05:55:59,864 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-02-17 05:55:59,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 05:55:59,870 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2023-02-17 05:55:59,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 05:55:59,894 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2023-02-17 05:55:59,894 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 05:55:59,894 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1987264720] [2023-02-17 05:55:59,895 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1987264720] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 05:55:59,895 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 05:55:59,895 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-02-17 05:55:59,895 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [323162855] [2023-02-17 05:55:59,895 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 05:55:59,896 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-02-17 05:55:59,896 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 05:55:59,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-02-17 05:55:59,897 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-02-17 05:55:59,897 INFO L87 Difference]: Start difference. First operand 32 states and 38 transitions. Second operand has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 states have internal predecessors, (25), 1 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2023-02-17 05:55:59,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 05:55:59,969 INFO L93 Difference]: Finished difference Result 45 states and 53 transitions. [2023-02-17 05:55:59,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-02-17 05:55:59,969 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 states have internal predecessors, (25), 1 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 40 [2023-02-17 05:55:59,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 05:55:59,970 INFO L225 Difference]: With dead ends: 45 [2023-02-17 05:55:59,970 INFO L226 Difference]: Without dead ends: 36 [2023-02-17 05:55:59,971 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2023-02-17 05:55:59,971 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 26 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-17 05:55:59,972 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 97 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-17 05:55:59,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2023-02-17 05:55:59,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 34. [2023-02-17 05:55:59,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 27 states have (on average 1.1481481481481481) internal successors, (31), 27 states have internal predecessors, (31), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2023-02-17 05:55:59,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 40 transitions. [2023-02-17 05:55:59,976 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 40 transitions. Word has length 40 [2023-02-17 05:55:59,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 05:55:59,977 INFO L495 AbstractCegarLoop]: Abstraction has 34 states and 40 transitions. [2023-02-17 05:55:59,977 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 states have internal predecessors, (25), 1 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2023-02-17 05:55:59,977 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 40 transitions. [2023-02-17 05:55:59,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-02-17 05:55:59,978 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 05:55:59,978 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 05:55:59,978 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-02-17 05:55:59,979 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 05:55:59,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 05:55:59,979 INFO L85 PathProgramCache]: Analyzing trace with hash -1968420967, now seen corresponding path program 1 times [2023-02-17 05:55:59,979 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 05:55:59,979 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1765734432] [2023-02-17 05:55:59,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 05:55:59,980 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 05:56:00,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 05:56:00,324 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-17 05:56:00,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 05:56:00,331 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-17 05:56:00,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 05:56:00,337 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-02-17 05:56:00,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 05:56:00,362 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2023-02-17 05:56:00,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 05:56:00,440 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 16 proven. 5 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-02-17 05:56:00,440 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 05:56:00,441 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1765734432] [2023-02-17 05:56:00,441 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1765734432] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 05:56:00,441 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1674932198] [2023-02-17 05:56:00,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 05:56:00,441 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 05:56:00,441 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 05:56:00,445 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-17 05:56:00,448 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-02-17 05:56:00,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 05:56:00,600 INFO L263 TraceCheckSpWp]: Trace formula consists of 375 conjuncts, 25 conjunts are in the unsatisfiable core [2023-02-17 05:56:00,604 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 05:56:00,670 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-02-17 05:56:00,723 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-17 05:56:00,725 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 11 [2023-02-17 05:56:00,729 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 19 proven. 5 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-02-17 05:56:00,730 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 05:56:00,840 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 19 proven. 5 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-02-17 05:56:00,840 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1674932198] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 05:56:00,840 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 05:56:00,851 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 17 [2023-02-17 05:56:00,851 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [587607215] [2023-02-17 05:56:00,851 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 05:56:00,852 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-02-17 05:56:00,852 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 05:56:00,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-02-17 05:56:00,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2023-02-17 05:56:00,853 INFO L87 Difference]: Start difference. First operand 34 states and 40 transitions. Second operand has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 13 states have internal predecessors, (41), 2 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) [2023-02-17 05:56:01,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 05:56:01,127 INFO L93 Difference]: Finished difference Result 53 states and 60 transitions. [2023-02-17 05:56:01,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-02-17 05:56:01,128 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 13 states have internal predecessors, (41), 2 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) Word has length 43 [2023-02-17 05:56:01,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 05:56:01,130 INFO L225 Difference]: With dead ends: 53 [2023-02-17 05:56:01,130 INFO L226 Difference]: Without dead ends: 41 [2023-02-17 05:56:01,130 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 77 SyntacticMatches, 12 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=188, Invalid=742, Unknown=0, NotChecked=0, Total=930 [2023-02-17 05:56:01,131 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 84 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 175 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 148 SdHoareTripleChecker+Invalid, 200 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 175 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-17 05:56:01,131 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [84 Valid, 148 Invalid, 200 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 175 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-17 05:56:01,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2023-02-17 05:56:01,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 35. [2023-02-17 05:56:01,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 28 states have (on average 1.1428571428571428) internal successors, (32), 28 states have internal predecessors, (32), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-02-17 05:56:01,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 40 transitions. [2023-02-17 05:56:01,141 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 40 transitions. Word has length 43 [2023-02-17 05:56:01,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 05:56:01,142 INFO L495 AbstractCegarLoop]: Abstraction has 35 states and 40 transitions. [2023-02-17 05:56:01,142 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 13 states have internal predecessors, (41), 2 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) [2023-02-17 05:56:01,142 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 40 transitions. [2023-02-17 05:56:01,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2023-02-17 05:56:01,146 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 05:56:01,146 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 05:56:01,153 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-02-17 05:56:01,352 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 [2023-02-17 05:56:01,353 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 05:56:01,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 05:56:01,354 INFO L85 PathProgramCache]: Analyzing trace with hash 2034659567, now seen corresponding path program 2 times [2023-02-17 05:56:01,354 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 05:56:01,354 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [738584483] [2023-02-17 05:56:01,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 05:56:01,357 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 05:56:01,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 05:56:01,735 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-17 05:56:01,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 05:56:01,742 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-17 05:56:01,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 05:56:01,749 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-02-17 05:56:01,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 05:56:01,773 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2023-02-17 05:56:01,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 05:56:01,836 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 17 proven. 6 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-02-17 05:56:01,836 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 05:56:01,836 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [738584483] [2023-02-17 05:56:01,837 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [738584483] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 05:56:01,837 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [83736923] [2023-02-17 05:56:01,837 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-17 05:56:01,837 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 05:56:01,837 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 05:56:01,841 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) [2023-02-17 05:56:01,844 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-02-17 05:56:02,008 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-17 05:56:02,009 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-17 05:56:02,011 INFO L263 TraceCheckSpWp]: Trace formula consists of 380 conjuncts, 23 conjunts are in the unsatisfiable core [2023-02-17 05:56:02,018 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 05:56:02,025 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-02-17 05:56:02,027 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-02-17 05:56:02,092 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 31 treesize of output 19 [2023-02-17 05:56:02,099 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 25 treesize of output 13 [2023-02-17 05:56:02,132 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-02-17 05:56:02,133 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 05:56:02,198 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-02-17 05:56:02,199 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [83736923] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 05:56:02,199 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 05:56:02,199 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8, 8] total 19 [2023-02-17 05:56:02,199 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [791631095] [2023-02-17 05:56:02,199 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 05:56:02,200 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-02-17 05:56:02,200 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 05:56:02,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-02-17 05:56:02,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=298, Unknown=0, NotChecked=0, Total=342 [2023-02-17 05:56:02,201 INFO L87 Difference]: Start difference. First operand 35 states and 40 transitions. Second operand has 19 states, 19 states have (on average 2.4210526315789473) internal successors, (46), 18 states have internal predecessors, (46), 2 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2023-02-17 05:56:02,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 05:56:02,565 INFO L93 Difference]: Finished difference Result 51 states and 58 transitions. [2023-02-17 05:56:02,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-02-17 05:56:02,565 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.4210526315789473) internal successors, (46), 18 states have internal predecessors, (46), 2 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) Word has length 44 [2023-02-17 05:56:02,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 05:56:02,566 INFO L225 Difference]: With dead ends: 51 [2023-02-17 05:56:02,566 INFO L226 Difference]: Without dead ends: 42 [2023-02-17 05:56:02,567 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 87 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=205, Invalid=1055, Unknown=0, NotChecked=0, Total=1260 [2023-02-17 05:56:02,567 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 61 mSDsluCounter, 141 mSDsCounter, 0 mSdLazyCounter, 286 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 159 SdHoareTripleChecker+Invalid, 302 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 286 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-17 05:56:02,568 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [61 Valid, 159 Invalid, 302 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 286 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-17 05:56:02,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2023-02-17 05:56:02,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 38. [2023-02-17 05:56:02,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 31 states have (on average 1.1290322580645162) internal successors, (35), 31 states have internal predecessors, (35), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-02-17 05:56:02,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 43 transitions. [2023-02-17 05:56:02,573 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 43 transitions. Word has length 44 [2023-02-17 05:56:02,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 05:56:02,573 INFO L495 AbstractCegarLoop]: Abstraction has 38 states and 43 transitions. [2023-02-17 05:56:02,573 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.4210526315789473) internal successors, (46), 18 states have internal predecessors, (46), 2 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2023-02-17 05:56:02,573 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 43 transitions. [2023-02-17 05:56:02,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2023-02-17 05:56:02,573 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 05:56:02,574 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 05:56:02,583 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-02-17 05:56:02,781 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 [2023-02-17 05:56:02,781 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 05:56:02,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 05:56:02,781 INFO L85 PathProgramCache]: Analyzing trace with hash 1693757662, now seen corresponding path program 3 times [2023-02-17 05:56:02,782 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 05:56:02,782 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [63616138] [2023-02-17 05:56:02,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 05:56:02,782 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 05:56:02,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 05:56:03,445 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-17 05:56:03,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 05:56:03,451 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-17 05:56:03,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 05:56:03,478 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-02-17 05:56:03,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 05:56:03,556 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2023-02-17 05:56:03,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 05:56:03,668 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 12 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-02-17 05:56:03,669 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 05:56:03,669 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [63616138] [2023-02-17 05:56:03,669 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [63616138] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 05:56:03,669 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1378875266] [2023-02-17 05:56:03,669 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-17 05:56:03,670 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 05:56:03,670 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 05:56:03,671 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) [2023-02-17 05:56:03,698 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-02-17 05:56:03,850 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-02-17 05:56:03,850 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-17 05:56:03,853 INFO L263 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 74 conjunts are in the unsatisfiable core [2023-02-17 05:56:03,856 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 05:56:03,887 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-02-17 05:56:03,891 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-02-17 05:56:03,979 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 14 [2023-02-17 05:56:03,982 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 14 [2023-02-17 05:56:04,108 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-17 05:56:04,109 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 64 [2023-02-17 05:56:04,115 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-17 05:56:04,115 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 58 [2023-02-17 05:56:04,342 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 19 proven. 7 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-02-17 05:56:04,343 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 05:56:04,662 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-17 05:56:04,663 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2023-02-17 05:56:04,666 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-17 05:56:04,667 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 35 [2023-02-17 05:56:04,672 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_~head~0.base_74 Int) (v_arrayElimArr_4 (Array Int Int)) (v_arrayElimArr_3 (Array Int Int))) (let ((.cse2 (+ 4 c_~head~0.offset))) (let ((.cse1 (+ 4 0)) (.cse0 (select (select (store |c_#memory_$Pointer$.base| v_~head~0.base_74 v_arrayElimArr_4) c_~head~0.base) .cse2))) (or (not (= .cse0 0)) (not (= (select v_arrayElimArr_3 .cse1) c_~head~0.offset)) (not (= (select v_arrayElimArr_4 .cse1) c_~head~0.base)) (not (= (select (select (store |c_#memory_$Pointer$.offset| v_~head~0.base_74 v_arrayElimArr_3) c_~head~0.base) .cse2) 0)) (not (= 0 .cse0)))))) is different from false [2023-02-17 05:56:04,673 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1378875266] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 05:56:04,673 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-17 05:56:04,673 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 27 [2023-02-17 05:56:04,674 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [538308911] [2023-02-17 05:56:04,674 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-17 05:56:04,674 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-02-17 05:56:04,674 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 05:56:04,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-02-17 05:56:04,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=1158, Unknown=3, NotChecked=68, Total=1332 [2023-02-17 05:56:04,676 INFO L87 Difference]: Start difference. First operand 38 states and 43 transitions. Second operand has 27 states, 27 states have (on average 1.8888888888888888) internal successors, (51), 23 states have internal predecessors, (51), 4 states have call successors, (8), 3 states have call predecessors, (8), 6 states have return successors, (7), 6 states have call predecessors, (7), 4 states have call successors, (7) [2023-02-17 05:56:06,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 05:56:06,058 INFO L93 Difference]: Finished difference Result 73 states and 82 transitions. [2023-02-17 05:56:06,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-02-17 05:56:06,058 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.8888888888888888) internal successors, (51), 23 states have internal predecessors, (51), 4 states have call successors, (8), 3 states have call predecessors, (8), 6 states have return successors, (7), 6 states have call predecessors, (7), 4 states have call successors, (7) Word has length 47 [2023-02-17 05:56:06,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 05:56:06,060 INFO L225 Difference]: With dead ends: 73 [2023-02-17 05:56:06,060 INFO L226 Difference]: Without dead ends: 58 [2023-02-17 05:56:06,061 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 50 SyntacticMatches, 2 SemanticMatches, 62 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 504 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=483, Invalid=3424, Unknown=3, NotChecked=122, Total=4032 [2023-02-17 05:56:06,062 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 105 mSDsluCounter, 307 mSDsCounter, 0 mSdLazyCounter, 607 mSolverCounterSat, 35 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 334 SdHoareTripleChecker+Invalid, 643 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 607 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-02-17 05:56:06,062 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [105 Valid, 334 Invalid, 643 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 607 Invalid, 1 Unknown, 0 Unchecked, 0.6s Time] [2023-02-17 05:56:06,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2023-02-17 05:56:06,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 39. [2023-02-17 05:56:06,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 32 states have (on average 1.125) internal successors, (36), 32 states have internal predecessors, (36), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-02-17 05:56:06,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 44 transitions. [2023-02-17 05:56:06,075 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 44 transitions. Word has length 47 [2023-02-17 05:56:06,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 05:56:06,076 INFO L495 AbstractCegarLoop]: Abstraction has 39 states and 44 transitions. [2023-02-17 05:56:06,076 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.8888888888888888) internal successors, (51), 23 states have internal predecessors, (51), 4 states have call successors, (8), 3 states have call predecessors, (8), 6 states have return successors, (7), 6 states have call predecessors, (7), 4 states have call successors, (7) [2023-02-17 05:56:06,076 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 44 transitions. [2023-02-17 05:56:06,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2023-02-17 05:56:06,078 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 05:56:06,078 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 05:56:06,089 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-02-17 05:56:06,284 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 [2023-02-17 05:56:06,285 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 05:56:06,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 05:56:06,285 INFO L85 PathProgramCache]: Analyzing trace with hash -1123139788, now seen corresponding path program 4 times [2023-02-17 05:56:06,286 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 05:56:06,286 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [888601815] [2023-02-17 05:56:06,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 05:56:06,286 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 05:56:06,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 05:56:06,886 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-17 05:56:06,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 05:56:06,903 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-17 05:56:06,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 05:56:06,927 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-02-17 05:56:06,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 05:56:06,993 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2023-02-17 05:56:06,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 05:56:07,098 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 14 proven. 19 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-02-17 05:56:07,099 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 05:56:07,099 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [888601815] [2023-02-17 05:56:07,099 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [888601815] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 05:56:07,099 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1350245843] [2023-02-17 05:56:07,100 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-17 05:56:07,100 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 05:56:07,100 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 05:56:07,101 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) [2023-02-17 05:56:07,124 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-02-17 05:56:07,299 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-17 05:56:07,299 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-17 05:56:07,302 INFO L263 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 63 conjunts are in the unsatisfiable core [2023-02-17 05:56:07,313 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 05:56:07,345 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-02-17 05:56:07,360 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-02-17 05:56:07,452 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-02-17 05:56:07,455 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 14 [2023-02-17 05:56:07,509 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-17 05:56:07,510 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 44 [2023-02-17 05:56:07,522 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-17 05:56:07,523 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2023-02-17 05:56:07,590 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 7 [2023-02-17 05:56:07,647 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-17 05:56:07,648 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 10 case distinctions, treesize of input 82 treesize of output 142 [2023-02-17 05:56:07,688 WARN L207 Elim1Store]: Array PQE input equivalent to false [2023-02-17 05:56:07,698 WARN L207 Elim1Store]: Array PQE input equivalent to false [2023-02-17 05:56:07,704 WARN L207 Elim1Store]: Array PQE input equivalent to false [2023-02-17 05:56:07,708 WARN L207 Elim1Store]: Array PQE input equivalent to false [2023-02-17 05:56:07,722 WARN L207 Elim1Store]: Array PQE input equivalent to false [2023-02-17 05:56:07,760 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 8 [2023-02-17 05:56:07,768 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 8 [2023-02-17 05:56:07,774 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 8 [2023-02-17 05:56:07,787 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 8 [2023-02-17 05:56:07,799 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 8 [2023-02-17 05:56:07,814 WARN L207 Elim1Store]: Array PQE input equivalent to false [2023-02-17 05:56:07,827 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 456 treesize of output 107 [2023-02-17 05:56:07,839 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 21 [2023-02-17 05:56:07,843 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 8 [2023-02-17 05:56:07,860 WARN L207 Elim1Store]: Array PQE input equivalent to false [2023-02-17 05:56:07,863 WARN L207 Elim1Store]: Array PQE input equivalent to false [2023-02-17 05:56:07,865 WARN L207 Elim1Store]: Array PQE input equivalent to false [2023-02-17 05:56:07,869 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 214 treesize of output 21 [2023-02-17 05:56:07,881 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 1 [2023-02-17 05:56:07,886 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 1 [2023-02-17 05:56:07,891 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 1 [2023-02-17 05:56:07,897 WARN L207 Elim1Store]: Array PQE input equivalent to false [2023-02-17 05:56:07,901 WARN L207 Elim1Store]: Array PQE input equivalent to false [2023-02-17 05:56:07,903 WARN L207 Elim1Store]: Array PQE input equivalent to false [2023-02-17 05:56:07,911 WARN L207 Elim1Store]: Array PQE input equivalent to false [2023-02-17 05:56:07,914 WARN L207 Elim1Store]: Array PQE input equivalent to false [2023-02-17 05:56:07,916 WARN L207 Elim1Store]: Array PQE input equivalent to false [2023-02-17 05:56:07,920 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 1 [2023-02-17 05:56:07,923 WARN L207 Elim1Store]: Array PQE input equivalent to false [2023-02-17 05:56:07,927 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 31 [2023-02-17 05:56:07,931 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 158 treesize of output 52 [2023-02-17 05:56:07,943 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 40 [2023-02-17 05:56:07,953 WARN L207 Elim1Store]: Array PQE input equivalent to false [2023-02-17 05:56:07,956 WARN L207 Elim1Store]: Array PQE input equivalent to false [2023-02-17 05:56:07,960 WARN L207 Elim1Store]: Array PQE input equivalent to false [2023-02-17 05:56:07,963 WARN L207 Elim1Store]: Array PQE input equivalent to false [2023-02-17 05:56:07,969 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 53 [2023-02-17 05:56:07,976 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 16 [2023-02-17 05:56:07,983 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 51 [2023-02-17 05:56:07,992 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 26 [2023-02-17 05:56:07,997 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 22 [2023-02-17 05:56:08,001 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 48 [2023-02-17 05:56:08,006 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 51 [2023-02-17 05:56:08,013 WARN L207 Elim1Store]: Array PQE input equivalent to false [2023-02-17 05:56:08,017 WARN L207 Elim1Store]: Array PQE input equivalent to false [2023-02-17 05:56:08,020 WARN L207 Elim1Store]: Array PQE input equivalent to false [2023-02-17 05:56:08,025 WARN L207 Elim1Store]: Array PQE input equivalent to false [2023-02-17 05:56:08,028 WARN L207 Elim1Store]: Array PQE input equivalent to false [2023-02-17 05:56:08,033 WARN L207 Elim1Store]: Array PQE input equivalent to false [2023-02-17 05:56:08,037 WARN L207 Elim1Store]: Array PQE input equivalent to false [2023-02-17 05:56:08,040 WARN L207 Elim1Store]: Array PQE input equivalent to false [2023-02-17 05:56:08,047 WARN L207 Elim1Store]: Array PQE input equivalent to false [2023-02-17 05:56:08,051 WARN L207 Elim1Store]: Array PQE input equivalent to false [2023-02-17 05:56:08,056 WARN L207 Elim1Store]: Array PQE input equivalent to false [2023-02-17 05:56:08,061 WARN L207 Elim1Store]: Array PQE input equivalent to false [2023-02-17 05:56:08,068 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 70 treesize of output 64 [2023-02-17 05:56:08,077 WARN L207 Elim1Store]: Array PQE input equivalent to false [2023-02-17 05:56:08,082 WARN L207 Elim1Store]: Array PQE input equivalent to false [2023-02-17 05:56:08,089 WARN L207 Elim1Store]: Array PQE input equivalent to false [2023-02-17 05:56:08,097 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 1 [2023-02-17 05:56:08,103 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 1 [2023-02-17 05:56:08,110 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 1 [2023-02-17 05:56:08,124 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 1 [2023-02-17 05:56:08,130 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 1 [2023-02-17 05:56:08,150 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 1 [2023-02-17 05:56:08,156 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 1 [2023-02-17 05:56:08,164 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 32 [2023-02-17 05:56:08,173 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 26 [2023-02-17 05:56:08,180 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 20 [2023-02-17 05:56:08,221 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 1107 treesize of output 408 [2023-02-17 05:56:08,238 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 19 proven. 19 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-02-17 05:56:08,238 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 05:56:08,315 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-17 05:56:08,315 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2023-02-17 05:56:08,345 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1350245843] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 05:56:08,346 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-17 05:56:08,346 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 23 [2023-02-17 05:56:08,346 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1564003643] [2023-02-17 05:56:08,346 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-17 05:56:08,346 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-02-17 05:56:08,346 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 05:56:08,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-02-17 05:56:08,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=635, Unknown=0, NotChecked=0, Total=702 [2023-02-17 05:56:08,347 INFO L87 Difference]: Start difference. First operand 39 states and 44 transitions. Second operand has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 20 states have internal predecessors, (54), 3 states have call successors, (8), 4 states have call predecessors, (8), 5 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) [2023-02-17 05:56:08,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 05:56:08,972 INFO L93 Difference]: Finished difference Result 58 states and 65 transitions. [2023-02-17 05:56:08,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-02-17 05:56:08,973 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 20 states have internal predecessors, (54), 3 states have call successors, (8), 4 states have call predecessors, (8), 5 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) Word has length 48 [2023-02-17 05:56:08,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 05:56:08,973 INFO L225 Difference]: With dead ends: 58 [2023-02-17 05:56:08,973 INFO L226 Difference]: Without dead ends: 49 [2023-02-17 05:56:08,974 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 56 SyntacticMatches, 10 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 316 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=316, Invalid=1940, Unknown=0, NotChecked=0, Total=2256 [2023-02-17 05:56:08,975 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 108 mSDsluCounter, 216 mSDsCounter, 0 mSdLazyCounter, 420 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 235 SdHoareTripleChecker+Invalid, 441 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 420 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-17 05:56:08,975 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [108 Valid, 235 Invalid, 441 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 420 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-17 05:56:08,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2023-02-17 05:56:08,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 42. [2023-02-17 05:56:08,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 35 states have (on average 1.1142857142857143) internal successors, (39), 35 states have internal predecessors, (39), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-02-17 05:56:08,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 47 transitions. [2023-02-17 05:56:08,982 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 47 transitions. Word has length 48 [2023-02-17 05:56:08,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 05:56:08,983 INFO L495 AbstractCegarLoop]: Abstraction has 42 states and 47 transitions. [2023-02-17 05:56:08,983 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 20 states have internal predecessors, (54), 3 states have call successors, (8), 4 states have call predecessors, (8), 5 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) [2023-02-17 05:56:08,983 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 47 transitions. [2023-02-17 05:56:08,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2023-02-17 05:56:08,984 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 05:56:08,984 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 05:56:08,995 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-02-17 05:56:09,191 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 [2023-02-17 05:56:09,191 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 05:56:09,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 05:56:09,192 INFO L85 PathProgramCache]: Analyzing trace with hash 361857145, now seen corresponding path program 5 times [2023-02-17 05:56:09,192 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 05:56:09,192 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1407975069] [2023-02-17 05:56:09,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 05:56:09,192 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 05:56:09,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 05:56:10,278 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-17 05:56:10,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 05:56:10,306 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-17 05:56:10,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 05:56:10,384 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-02-17 05:56:10,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 05:56:10,517 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2023-02-17 05:56:10,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 05:56:10,667 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 7 proven. 40 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-02-17 05:56:10,667 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 05:56:10,668 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1407975069] [2023-02-17 05:56:10,668 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1407975069] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 05:56:10,668 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1885375553] [2023-02-17 05:56:10,668 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-17 05:56:10,668 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 05:56:10,669 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 05:56:10,670 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) [2023-02-17 05:56:10,702 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-02-17 05:56:10,880 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-02-17 05:56:10,880 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-17 05:56:10,888 INFO L263 TraceCheckSpWp]: Trace formula consists of 405 conjuncts, 114 conjunts are in the unsatisfiable core [2023-02-17 05:56:10,892 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 05:56:10,956 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-02-17 05:56:10,979 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-02-17 05:56:11,083 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-02-17 05:56:11,086 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 14 [2023-02-17 05:56:11,160 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-17 05:56:11,160 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 44 [2023-02-17 05:56:11,167 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-17 05:56:11,167 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 23 treesize of output 56 [2023-02-17 05:56:11,264 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 14 [2023-02-17 05:56:11,267 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 14 [2023-02-17 05:56:11,339 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-17 05:56:11,341 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-17 05:56:11,341 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 158 treesize of output 129 [2023-02-17 05:56:11,347 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-17 05:56:11,348 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-17 05:56:11,348 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 80 treesize of output 62 [2023-02-17 05:56:11,352 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-17 05:56:11,353 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 15 [2023-02-17 05:56:11,622 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 19 proven. 17 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-02-17 05:56:11,622 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 05:56:11,786 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-17 05:56:11,787 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 45 [2023-02-17 05:56:11,789 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-17 05:56:11,789 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 40 [2023-02-17 05:56:11,867 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1885375553] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 05:56:11,867 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-17 05:56:11,867 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 23] total 40 [2023-02-17 05:56:11,868 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2105061536] [2023-02-17 05:56:11,868 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-17 05:56:11,868 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2023-02-17 05:56:11,868 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 05:56:11,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2023-02-17 05:56:11,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=1908, Unknown=1, NotChecked=0, Total=2070 [2023-02-17 05:56:11,870 INFO L87 Difference]: Start difference. First operand 42 states and 47 transitions. Second operand has 40 states, 40 states have (on average 1.725) internal successors, (69), 35 states have internal predecessors, (69), 6 states have call successors, (8), 5 states have call predecessors, (8), 8 states have return successors, (8), 7 states have call predecessors, (8), 6 states have call successors, (8) [2023-02-17 05:56:13,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 05:56:13,317 INFO L93 Difference]: Finished difference Result 87 states and 96 transitions. [2023-02-17 05:56:13,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2023-02-17 05:56:13,318 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 1.725) internal successors, (69), 35 states have internal predecessors, (69), 6 states have call successors, (8), 5 states have call predecessors, (8), 8 states have return successors, (8), 7 states have call predecessors, (8), 6 states have call successors, (8) Word has length 51 [2023-02-17 05:56:13,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 05:56:13,319 INFO L225 Difference]: With dead ends: 87 [2023-02-17 05:56:13,319 INFO L226 Difference]: Without dead ends: 69 [2023-02-17 05:56:13,321 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 51 SyntacticMatches, 7 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1386 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=799, Invalid=5680, Unknown=1, NotChecked=0, Total=6480 [2023-02-17 05:56:13,322 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 208 mSDsluCounter, 334 mSDsCounter, 0 mSdLazyCounter, 757 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 208 SdHoareTripleChecker+Valid, 358 SdHoareTripleChecker+Invalid, 816 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 757 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-02-17 05:56:13,322 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [208 Valid, 358 Invalid, 816 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 757 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-02-17 05:56:13,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2023-02-17 05:56:13,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 63. [2023-02-17 05:56:13,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 51 states have (on average 1.0784313725490196) internal successors, (55), 52 states have internal predecessors, (55), 6 states have call successors, (6), 4 states have call predecessors, (6), 5 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) [2023-02-17 05:56:13,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 68 transitions. [2023-02-17 05:56:13,334 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 68 transitions. Word has length 51 [2023-02-17 05:56:13,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 05:56:13,334 INFO L495 AbstractCegarLoop]: Abstraction has 63 states and 68 transitions. [2023-02-17 05:56:13,334 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 1.725) internal successors, (69), 35 states have internal predecessors, (69), 6 states have call successors, (8), 5 states have call predecessors, (8), 8 states have return successors, (8), 7 states have call predecessors, (8), 6 states have call successors, (8) [2023-02-17 05:56:13,335 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 68 transitions. [2023-02-17 05:56:13,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2023-02-17 05:56:13,335 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 05:56:13,335 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 05:56:13,348 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-02-17 05:56:13,547 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 [2023-02-17 05:56:13,547 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 05:56:13,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 05:56:13,548 INFO L85 PathProgramCache]: Analyzing trace with hash 1042924030, now seen corresponding path program 6 times [2023-02-17 05:56:13,548 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 05:56:13,548 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1333277506] [2023-02-17 05:56:13,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 05:56:13,548 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 05:56:13,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 05:56:15,071 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-17 05:56:15,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 05:56:15,153 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-17 05:56:15,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 05:56:15,314 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-02-17 05:56:15,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 05:56:15,503 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2023-02-17 05:56:15,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 05:56:15,696 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 14 proven. 49 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-02-17 05:56:15,696 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 05:56:15,696 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1333277506] [2023-02-17 05:56:15,696 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1333277506] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 05:56:15,696 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1064666039] [2023-02-17 05:56:15,696 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-02-17 05:56:15,696 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 05:56:15,697 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 05:56:15,698 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) [2023-02-17 05:56:15,701 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-02-17 05:56:15,924 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2023-02-17 05:56:15,924 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-17 05:56:15,928 INFO L263 TraceCheckSpWp]: Trace formula consists of 420 conjuncts, 156 conjunts are in the unsatisfiable core [2023-02-17 05:56:15,933 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 05:56:15,936 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-02-17 05:56:15,953 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-17 05:56:15,954 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 17 [2023-02-17 05:56:16,047 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-02-17 05:56:16,050 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-02-17 05:56:16,119 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-17 05:56:16,119 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 23 treesize of output 56 [2023-02-17 05:56:16,123 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 15 [2023-02-17 05:56:16,223 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 14 [2023-02-17 05:56:16,225 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 14 [2023-02-17 05:56:16,323 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-17 05:56:16,324 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 43 [2023-02-17 05:56:16,329 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-17 05:56:16,330 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 105 treesize of output 70 [2023-02-17 05:56:16,334 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-17 05:56:16,334 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 59 [2023-02-17 05:56:16,338 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-17 05:56:16,341 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-17 05:56:16,341 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 88 treesize of output 124 [2023-02-17 05:56:16,458 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 14 [2023-02-17 05:56:16,464 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 14 [2023-02-17 05:56:16,559 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-17 05:56:16,561 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-17 05:56:16,562 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 530 treesize of output 301 [2023-02-17 05:56:16,569 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-17 05:56:16,569 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 87 treesize of output 157 [2023-02-17 05:56:16,583 WARN L207 Elim1Store]: Array PQE input equivalent to false [2023-02-17 05:56:16,587 WARN L207 Elim1Store]: Array PQE input equivalent to false [2023-02-17 05:56:16,593 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-17 05:56:16,594 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-17 05:56:16,595 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-17 05:56:16,595 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 222 treesize of output 178 [2023-02-17 05:56:16,600 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-17 05:56:16,601 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-17 05:56:16,602 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-17 05:56:16,602 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 46 [2023-02-17 05:56:16,607 WARN L207 Elim1Store]: Array PQE input equivalent to false [2023-02-17 05:57:04,174 INFO L217 Elim1Store]: Index analysis took 205 ms [2023-02-17 05:57:21,312 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-17 05:57:26,772 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1153 select indices, 1153 select index equivalence classes, 0 disjoint index pairs (out of 664128 index pairs), introduced 2017 new quantified variables, introduced 664128 case distinctions, treesize of input 68235 treesize of output 5353993