./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/recursive/EvenOdd01-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 3dbbec33 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/recursive/EvenOdd01-1.c -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 90982c548a5fc18702a6b533ab589c969b87a7efde724f265c9d2a7d593347dc --- Real Ultimate output --- This is Ultimate 0.2.2-?-3dbbec3 [2023-02-14 13:03:18,724 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-02-14 13:03:18,727 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-02-14 13:03:18,762 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-02-14 13:03:18,763 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-02-14 13:03:18,765 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-02-14 13:03:18,767 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-02-14 13:03:18,769 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-02-14 13:03:18,771 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-02-14 13:03:18,775 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-02-14 13:03:18,776 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-02-14 13:03:18,777 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-02-14 13:03:18,778 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-02-14 13:03:18,780 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-02-14 13:03:18,781 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-02-14 13:03:18,782 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-02-14 13:03:18,783 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-02-14 13:03:18,784 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-02-14 13:03:18,785 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-02-14 13:03:18,789 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-02-14 13:03:18,790 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-02-14 13:03:18,791 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-02-14 13:03:18,792 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-02-14 13:03:18,793 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-02-14 13:03:18,799 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-02-14 13:03:18,800 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-02-14 13:03:18,800 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-02-14 13:03:18,802 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-02-14 13:03:18,802 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-02-14 13:03:18,803 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-02-14 13:03:18,803 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-02-14 13:03:18,803 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-02-14 13:03:18,805 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-02-14 13:03:18,806 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-02-14 13:03:18,807 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-02-14 13:03:18,807 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-02-14 13:03:18,808 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-02-14 13:03:18,808 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-02-14 13:03:18,808 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-02-14 13:03:18,809 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-02-14 13:03:18,811 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-02-14 13:03:18,812 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-02-14 13:03:18,841 INFO L113 SettingsManager]: Loading preferences was successful [2023-02-14 13:03:18,842 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-02-14 13:03:18,843 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-02-14 13:03:18,843 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-02-14 13:03:18,844 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-02-14 13:03:18,844 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-02-14 13:03:18,845 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-02-14 13:03:18,845 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-02-14 13:03:18,845 INFO L138 SettingsManager]: * Use SBE=true [2023-02-14 13:03:18,845 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-02-14 13:03:18,846 INFO L138 SettingsManager]: * sizeof long=4 [2023-02-14 13:03:18,846 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-02-14 13:03:18,846 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-02-14 13:03:18,846 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-02-14 13:03:18,847 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-02-14 13:03:18,847 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-02-14 13:03:18,847 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-02-14 13:03:18,847 INFO L138 SettingsManager]: * sizeof long double=12 [2023-02-14 13:03:18,847 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-02-14 13:03:18,847 INFO L138 SettingsManager]: * Use constant arrays=true [2023-02-14 13:03:18,848 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-02-14 13:03:18,848 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-02-14 13:03:18,848 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-02-14 13:03:18,848 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-02-14 13:03:18,848 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-14 13:03:18,849 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-02-14 13:03:18,849 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-02-14 13:03:18,849 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-02-14 13:03:18,849 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-02-14 13:03:18,849 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-02-14 13:03:18,850 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-02-14 13:03:18,850 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-02-14 13:03:18,850 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-02-14 13:03:18,850 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-02-14 13:03:18,850 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-02-14 13:03:18,851 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 90982c548a5fc18702a6b533ab589c969b87a7efde724f265c9d2a7d593347dc [2023-02-14 13:03:19,059 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-02-14 13:03:19,078 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-02-14 13:03:19,080 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-02-14 13:03:19,081 INFO L271 PluginConnector]: Initializing CDTParser... [2023-02-14 13:03:19,081 INFO L275 PluginConnector]: CDTParser initialized [2023-02-14 13:03:19,082 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/recursive/EvenOdd01-1.c [2023-02-14 13:03:20,057 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-02-14 13:03:20,214 INFO L351 CDTParser]: Found 1 translation units. [2023-02-14 13:03:20,214 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursive/EvenOdd01-1.c [2023-02-14 13:03:20,219 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/de2d6e292/b24c04e6b0084d1ba970aa5ba233fbbc/FLAGb24910d8a [2023-02-14 13:03:20,232 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/de2d6e292/b24c04e6b0084d1ba970aa5ba233fbbc [2023-02-14 13:03:20,238 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-02-14 13:03:20,240 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-02-14 13:03:20,243 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-02-14 13:03:20,243 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-02-14 13:03:20,245 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-02-14 13:03:20,246 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.02 01:03:20" (1/1) ... [2023-02-14 13:03:20,247 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3870e023 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 01:03:20, skipping insertion in model container [2023-02-14 13:03:20,247 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.02 01:03:20" (1/1) ... [2023-02-14 13:03:20,253 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-02-14 13:03:20,266 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-02-14 13:03:20,400 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/recursive/EvenOdd01-1.c[975,988] [2023-02-14 13:03:20,403 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-14 13:03:20,413 INFO L203 MainTranslator]: Completed pre-run [2023-02-14 13:03:20,426 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/recursive/EvenOdd01-1.c[975,988] [2023-02-14 13:03:20,426 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-14 13:03:20,436 INFO L208 MainTranslator]: Completed translation [2023-02-14 13:03:20,436 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 01:03:20 WrapperNode [2023-02-14 13:03:20,436 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-02-14 13:03:20,437 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-02-14 13:03:20,437 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-02-14 13:03:20,438 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-02-14 13:03:20,443 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 01:03:20" (1/1) ... [2023-02-14 13:03:20,452 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 01:03:20" (1/1) ... [2023-02-14 13:03:20,463 INFO L138 Inliner]: procedures = 14, calls = 10, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 27 [2023-02-14 13:03:20,464 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-02-14 13:03:20,464 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-02-14 13:03:20,464 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-02-14 13:03:20,464 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-02-14 13:03:20,477 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 01:03:20" (1/1) ... [2023-02-14 13:03:20,477 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 01:03:20" (1/1) ... [2023-02-14 13:03:20,481 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 01:03:20" (1/1) ... [2023-02-14 13:03:20,482 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 01:03:20" (1/1) ... [2023-02-14 13:03:20,483 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 01:03:20" (1/1) ... [2023-02-14 13:03:20,485 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 01:03:20" (1/1) ... [2023-02-14 13:03:20,486 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 01:03:20" (1/1) ... [2023-02-14 13:03:20,487 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 01:03:20" (1/1) ... [2023-02-14 13:03:20,488 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-02-14 13:03:20,488 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-02-14 13:03:20,489 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-02-14 13:03:20,489 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-02-14 13:03:20,489 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 01:03:20" (1/1) ... [2023-02-14 13:03:20,499 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-14 13:03:20,510 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 13:03:20,525 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) [2023-02-14 13:03:20,533 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 [2023-02-14 13:03:20,558 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-02-14 13:03:20,558 INFO L130 BoogieDeclarations]: Found specification of procedure isEven [2023-02-14 13:03:20,558 INFO L138 BoogieDeclarations]: Found implementation of procedure isEven [2023-02-14 13:03:20,558 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-02-14 13:03:20,558 INFO L130 BoogieDeclarations]: Found specification of procedure isOdd [2023-02-14 13:03:20,558 INFO L138 BoogieDeclarations]: Found implementation of procedure isOdd [2023-02-14 13:03:20,558 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-02-14 13:03:20,559 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-02-14 13:03:20,601 INFO L235 CfgBuilder]: Building ICFG [2023-02-14 13:03:20,603 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2023-02-14 13:03:20,693 INFO L276 CfgBuilder]: Performing block encoding [2023-02-14 13:03:20,698 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-02-14 13:03:20,698 INFO L300 CfgBuilder]: Removed 0 assume(true) statements. [2023-02-14 13:03:20,699 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.02 01:03:20 BoogieIcfgContainer [2023-02-14 13:03:20,700 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-02-14 13:03:20,701 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-02-14 13:03:20,701 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-02-14 13:03:20,704 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-02-14 13:03:20,704 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.02 01:03:20" (1/3) ... [2023-02-14 13:03:20,704 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@25806da2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.02 01:03:20, skipping insertion in model container [2023-02-14 13:03:20,705 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 01:03:20" (2/3) ... [2023-02-14 13:03:20,705 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@25806da2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.02 01:03:20, skipping insertion in model container [2023-02-14 13:03:20,705 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.02 01:03:20" (3/3) ... [2023-02-14 13:03:20,706 INFO L112 eAbstractionObserver]: Analyzing ICFG EvenOdd01-1.c [2023-02-14 13:03:20,729 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-02-14 13:03:20,729 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-02-14 13:03:20,764 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-02-14 13:03:20,769 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;@7a027ec, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-02-14 13:03:20,769 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-02-14 13:03:20,772 INFO L276 IsEmpty]: Start isEmpty. Operand has 25 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 19 states have internal predecessors, (25), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-14 13:03:20,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-02-14 13:03:20,777 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 13:03:20,778 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 13:03:20,778 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 13:03:20,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 13:03:20,782 INFO L85 PathProgramCache]: Analyzing trace with hash 951696528, now seen corresponding path program 1 times [2023-02-14 13:03:20,788 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 13:03:20,789 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1364802350] [2023-02-14 13:03:20,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 13:03:20,789 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 13:03:20,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:03:21,302 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:03:21,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:03:21,373 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 13:03:21,373 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 13:03:21,373 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1364802350] [2023-02-14 13:03:21,374 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1364802350] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-14 13:03:21,374 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-14 13:03:21,375 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-02-14 13:03:21,376 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [396793700] [2023-02-14 13:03:21,377 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 13:03:21,380 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-02-14 13:03:21,381 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 13:03:21,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-14 13:03:21,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-02-14 13:03:21,405 INFO L87 Difference]: Start difference. First operand has 25 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 19 states have internal predecessors, (25), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 6 states, 6 states have (on average 1.5) internal successors, (9), 5 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-14 13:03:21,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 13:03:21,499 INFO L93 Difference]: Finished difference Result 37 states and 43 transitions. [2023-02-14 13:03:21,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-14 13:03:21,501 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.5) internal successors, (9), 5 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2023-02-14 13:03:21,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 13:03:21,525 INFO L225 Difference]: With dead ends: 37 [2023-02-14 13:03:21,526 INFO L226 Difference]: Without dead ends: 24 [2023-02-14 13:03:21,528 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-02-14 13:03:21,530 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 10 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-14 13:03:21,531 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 97 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-14 13:03:21,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2023-02-14 13:03:21,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2023-02-14 13:03:21,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 18 states have internal predecessors, (21), 3 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2023-02-14 13:03:21,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2023-02-14 13:03:21,579 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 11 [2023-02-14 13:03:21,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 13:03:21,580 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2023-02-14 13:03:21,580 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.5) internal successors, (9), 5 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-14 13:03:21,580 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2023-02-14 13:03:21,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-02-14 13:03:21,581 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 13:03:21,581 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 13:03:21,581 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-02-14 13:03:21,582 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 13:03:21,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 13:03:21,582 INFO L85 PathProgramCache]: Analyzing trace with hash 186374926, now seen corresponding path program 1 times [2023-02-14 13:03:21,582 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 13:03:21,583 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [999021644] [2023-02-14 13:03:21,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 13:03:21,583 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 13:03:21,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:03:21,874 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:03:21,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:03:21,937 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 13:03:21,938 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 13:03:21,938 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [999021644] [2023-02-14 13:03:21,938 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [999021644] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-14 13:03:21,939 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-14 13:03:21,939 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-02-14 13:03:21,939 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [953315825] [2023-02-14 13:03:21,940 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 13:03:21,941 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-02-14 13:03:21,941 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 13:03:21,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-02-14 13:03:21,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-02-14 13:03:21,943 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand has 7 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 6 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-14 13:03:22,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 13:03:22,014 INFO L93 Difference]: Finished difference Result 30 states and 34 transitions. [2023-02-14 13:03:22,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-02-14 13:03:22,015 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 6 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2023-02-14 13:03:22,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 13:03:22,017 INFO L225 Difference]: With dead ends: 30 [2023-02-14 13:03:22,017 INFO L226 Difference]: Without dead ends: 26 [2023-02-14 13:03:22,020 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2023-02-14 13:03:22,023 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 9 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-14 13:03:22,024 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 77 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-14 13:03:22,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2023-02-14 13:03:22,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 24. [2023-02-14 13:03:22,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 18 states have internal predecessors, (21), 3 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2023-02-14 13:03:22,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2023-02-14 13:03:22,043 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 12 [2023-02-14 13:03:22,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 13:03:22,044 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2023-02-14 13:03:22,044 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 6 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-14 13:03:22,044 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2023-02-14 13:03:22,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-02-14 13:03:22,045 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 13:03:22,049 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 13:03:22,049 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-02-14 13:03:22,049 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 13:03:22,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 13:03:22,050 INFO L85 PathProgramCache]: Analyzing trace with hash -1539294770, now seen corresponding path program 1 times [2023-02-14 13:03:22,050 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 13:03:22,050 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2045836348] [2023-02-14 13:03:22,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 13:03:22,050 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 13:03:22,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:03:22,072 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:03:22,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:03:22,108 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:03:22,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:03:22,127 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 13:03:22,127 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 13:03:22,127 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2045836348] [2023-02-14 13:03:22,128 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2045836348] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-14 13:03:22,128 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-14 13:03:22,128 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-14 13:03:22,128 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1794043574] [2023-02-14 13:03:22,128 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 13:03:22,129 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-14 13:03:22,129 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 13:03:22,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-14 13:03:22,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-02-14 13:03:22,130 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand has 5 states, 4 states have (on average 3.5) internal successors, (14), 5 states have internal predecessors, (14), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-14 13:03:22,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 13:03:22,157 INFO L93 Difference]: Finished difference Result 38 states and 42 transitions. [2023-02-14 13:03:22,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-02-14 13:03:22,158 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.5) internal successors, (14), 5 states have internal predecessors, (14), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 18 [2023-02-14 13:03:22,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 13:03:22,159 INFO L225 Difference]: With dead ends: 38 [2023-02-14 13:03:22,160 INFO L226 Difference]: Without dead ends: 26 [2023-02-14 13:03:22,162 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-02-14 13:03:22,167 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 7 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-14 13:03:22,168 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 66 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-14 13:03:22,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2023-02-14 13:03:22,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 24. [2023-02-14 13:03:22,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 18 states have internal predecessors, (20), 3 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2023-02-14 13:03:22,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 27 transitions. [2023-02-14 13:03:22,177 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 27 transitions. Word has length 18 [2023-02-14 13:03:22,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 13:03:22,178 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 27 transitions. [2023-02-14 13:03:22,178 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.5) internal successors, (14), 5 states have internal predecessors, (14), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-14 13:03:22,178 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 27 transitions. [2023-02-14 13:03:22,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-02-14 13:03:22,179 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 13:03:22,179 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 13:03:22,179 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-02-14 13:03:22,180 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 13:03:22,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 13:03:22,181 INFO L85 PathProgramCache]: Analyzing trace with hash -542404186, now seen corresponding path program 1 times [2023-02-14 13:03:22,181 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 13:03:22,181 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [747190687] [2023-02-14 13:03:22,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 13:03:22,182 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 13:03:22,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:03:22,342 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:03:22,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:03:22,438 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:03:22,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:03:22,467 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 13:03:22,467 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 13:03:22,468 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [747190687] [2023-02-14 13:03:22,468 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [747190687] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-14 13:03:22,468 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-14 13:03:22,468 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2023-02-14 13:03:22,468 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [58995107] [2023-02-14 13:03:22,468 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 13:03:22,469 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-02-14 13:03:22,469 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 13:03:22,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-02-14 13:03:22,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2023-02-14 13:03:22,470 INFO L87 Difference]: Start difference. First operand 24 states and 27 transitions. Second operand has 10 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 states have internal predecessors, (15), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-14 13:03:22,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 13:03:22,572 INFO L93 Difference]: Finished difference Result 33 states and 36 transitions. [2023-02-14 13:03:22,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-02-14 13:03:22,573 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 states have internal predecessors, (15), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 19 [2023-02-14 13:03:22,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 13:03:22,575 INFO L225 Difference]: With dead ends: 33 [2023-02-14 13:03:22,575 INFO L226 Difference]: Without dead ends: 29 [2023-02-14 13:03:22,576 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2023-02-14 13:03:22,580 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 12 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 121 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-14 13:03:22,581 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 76 Invalid, 121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 121 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-14 13:03:22,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2023-02-14 13:03:22,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 27. [2023-02-14 13:03:22,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 20 states have internal predecessors, (22), 3 states have call successors, (3), 2 states have call predecessors, (3), 4 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2023-02-14 13:03:22,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 30 transitions. [2023-02-14 13:03:22,590 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 30 transitions. Word has length 19 [2023-02-14 13:03:22,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 13:03:22,590 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 30 transitions. [2023-02-14 13:03:22,591 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 states have internal predecessors, (15), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-14 13:03:22,591 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 30 transitions. [2023-02-14 13:03:22,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-02-14 13:03:22,592 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 13:03:22,592 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 13:03:22,592 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-02-14 13:03:22,592 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 13:03:22,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 13:03:22,593 INFO L85 PathProgramCache]: Analyzing trace with hash 928601386, now seen corresponding path program 1 times [2023-02-14 13:03:22,593 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 13:03:22,593 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1268684587] [2023-02-14 13:03:22,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 13:03:22,593 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 13:03:22,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:03:22,614 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:03:22,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:03:22,623 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:03:22,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:03:22,633 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:03:22,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:03:22,652 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-14 13:03:22,652 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 13:03:22,652 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1268684587] [2023-02-14 13:03:22,652 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1268684587] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-14 13:03:22,652 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-14 13:03:22,653 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-14 13:03:22,653 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [751106197] [2023-02-14 13:03:22,655 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 13:03:22,656 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-14 13:03:22,656 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 13:03:22,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-14 13:03:22,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-02-14 13:03:22,657 INFO L87 Difference]: Start difference. First operand 27 states and 30 transitions. Second operand has 5 states, 4 states have (on average 4.75) internal successors, (19), 5 states have internal predecessors, (19), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2023-02-14 13:03:22,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 13:03:22,681 INFO L93 Difference]: Finished difference Result 39 states and 42 transitions. [2023-02-14 13:03:22,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-02-14 13:03:22,682 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.75) internal successors, (19), 5 states have internal predecessors, (19), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 25 [2023-02-14 13:03:22,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 13:03:22,683 INFO L225 Difference]: With dead ends: 39 [2023-02-14 13:03:22,683 INFO L226 Difference]: Without dead ends: 27 [2023-02-14 13:03:22,683 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-02-14 13:03:22,683 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 7 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-14 13:03:22,684 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 49 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-14 13:03:22,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2023-02-14 13:03:22,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2023-02-14 13:03:22,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 19 states have (on average 1.105263157894737) internal successors, (21), 20 states have internal predecessors, (21), 3 states have call successors, (3), 2 states have call predecessors, (3), 4 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2023-02-14 13:03:22,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 29 transitions. [2023-02-14 13:03:22,687 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 29 transitions. Word has length 25 [2023-02-14 13:03:22,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 13:03:22,688 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 29 transitions. [2023-02-14 13:03:22,688 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.75) internal successors, (19), 5 states have internal predecessors, (19), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2023-02-14 13:03:22,688 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 29 transitions. [2023-02-14 13:03:22,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-02-14 13:03:22,688 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 13:03:22,689 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 13:03:22,689 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-02-14 13:03:22,689 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 13:03:22,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 13:03:22,689 INFO L85 PathProgramCache]: Analyzing trace with hash 1102972856, now seen corresponding path program 1 times [2023-02-14 13:03:22,689 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 13:03:22,690 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2136553806] [2023-02-14 13:03:22,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 13:03:22,690 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 13:03:22,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:03:22,821 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:03:22,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:03:22,883 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:03:22,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:03:22,933 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:03:22,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:03:22,993 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-14 13:03:22,994 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 13:03:22,994 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2136553806] [2023-02-14 13:03:22,994 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2136553806] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 13:03:22,994 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [380630161] [2023-02-14 13:03:22,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 13:03:22,994 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 13:03:22,995 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 13:03:23,005 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) [2023-02-14 13:03:23,007 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-02-14 13:03:23,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:03:23,040 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 32 conjunts are in the unsatisfiable core [2023-02-14 13:03:23,044 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 13:03:23,245 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-02-14 13:03:23,246 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 13:03:23,727 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-14 13:03:23,728 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [380630161] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 13:03:23,728 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 13:03:23,728 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 22 [2023-02-14 13:03:23,728 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1728493679] [2023-02-14 13:03:23,728 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 13:03:23,728 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-02-14 13:03:23,728 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 13:03:23,729 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-02-14 13:03:23,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=396, Unknown=0, NotChecked=0, Total=462 [2023-02-14 13:03:23,729 INFO L87 Difference]: Start difference. First operand 27 states and 29 transitions. Second operand has 22 states, 20 states have (on average 1.85) internal successors, (37), 16 states have internal predecessors, (37), 7 states have call successors, (7), 1 states have call predecessors, (7), 4 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2023-02-14 13:03:23,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 13:03:23,907 INFO L93 Difference]: Finished difference Result 39 states and 41 transitions. [2023-02-14 13:03:23,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-02-14 13:03:23,907 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 20 states have (on average 1.85) internal successors, (37), 16 states have internal predecessors, (37), 7 states have call successors, (7), 1 states have call predecessors, (7), 4 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) Word has length 26 [2023-02-14 13:03:23,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 13:03:23,908 INFO L225 Difference]: With dead ends: 39 [2023-02-14 13:03:23,908 INFO L226 Difference]: Without dead ends: 35 [2023-02-14 13:03:23,908 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 43 SyntacticMatches, 4 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=106, Invalid=650, Unknown=0, NotChecked=0, Total=756 [2023-02-14 13:03:23,909 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 14 mSDsluCounter, 131 mSDsCounter, 0 mSdLazyCounter, 237 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 238 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 237 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-14 13:03:23,909 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 146 Invalid, 238 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 237 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-14 13:03:23,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2023-02-14 13:03:23,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 30. [2023-02-14 13:03:23,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 21 states have (on average 1.0952380952380953) internal successors, (23), 22 states have internal predecessors, (23), 3 states have call successors, (3), 2 states have call predecessors, (3), 5 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) [2023-02-14 13:03:23,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 32 transitions. [2023-02-14 13:03:23,912 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 32 transitions. Word has length 26 [2023-02-14 13:03:23,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 13:03:23,912 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 32 transitions. [2023-02-14 13:03:23,912 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 20 states have (on average 1.85) internal successors, (37), 16 states have internal predecessors, (37), 7 states have call successors, (7), 1 states have call predecessors, (7), 4 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2023-02-14 13:03:23,912 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 32 transitions. [2023-02-14 13:03:23,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2023-02-14 13:03:23,913 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 13:03:23,913 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 13:03:23,922 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-02-14 13:03:24,113 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,SelfDestructingSolverStorable5 [2023-02-14 13:03:24,114 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 13:03:24,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 13:03:24,114 INFO L85 PathProgramCache]: Analyzing trace with hash 550160832, now seen corresponding path program 1 times [2023-02-14 13:03:24,114 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 13:03:24,114 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [398834929] [2023-02-14 13:03:24,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 13:03:24,114 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 13:03:24,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:03:24,202 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:03:24,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:03:24,255 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:03:24,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:03:24,298 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:03:24,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:03:24,340 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:03:24,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:03:24,383 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-02-14 13:03:24,383 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 13:03:24,383 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [398834929] [2023-02-14 13:03:24,384 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [398834929] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 13:03:24,384 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1897933407] [2023-02-14 13:03:24,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 13:03:24,384 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 13:03:24,384 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 13:03:24,399 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) [2023-02-14 13:03:24,400 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-02-14 13:03:24,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:03:24,428 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 40 conjunts are in the unsatisfiable core [2023-02-14 13:03:24,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 13:03:24,552 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-02-14 13:03:24,553 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 13:03:25,104 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-14 13:03:25,104 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1897933407] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 13:03:25,104 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 13:03:25,104 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 15] total 24 [2023-02-14 13:03:25,105 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [463402360] [2023-02-14 13:03:25,105 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 13:03:25,105 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-02-14 13:03:25,105 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 13:03:25,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-02-14 13:03:25,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=481, Unknown=0, NotChecked=0, Total=552 [2023-02-14 13:03:25,106 INFO L87 Difference]: Start difference. First operand 30 states and 32 transitions. Second operand has 24 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 17 states have internal predecessors, (41), 7 states have call successors, (7), 1 states have call predecessors, (7), 5 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) [2023-02-14 13:03:25,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 13:03:25,394 INFO L93 Difference]: Finished difference Result 45 states and 47 transitions. [2023-02-14 13:03:25,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-02-14 13:03:25,394 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 17 states have internal predecessors, (41), 7 states have call successors, (7), 1 states have call predecessors, (7), 5 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) Word has length 33 [2023-02-14 13:03:25,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 13:03:25,395 INFO L225 Difference]: With dead ends: 45 [2023-02-14 13:03:25,395 INFO L226 Difference]: Without dead ends: 41 [2023-02-14 13:03:25,396 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 60 SyntacticMatches, 3 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=133, Invalid=923, Unknown=0, NotChecked=0, Total=1056 [2023-02-14 13:03:25,396 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 14 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 353 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 196 SdHoareTripleChecker+Invalid, 356 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 353 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-14 13:03:25,396 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 196 Invalid, 356 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 353 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-14 13:03:25,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2023-02-14 13:03:25,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 33. [2023-02-14 13:03:25,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 23 states have (on average 1.0869565217391304) internal successors, (25), 24 states have internal predecessors, (25), 3 states have call successors, (3), 2 states have call predecessors, (3), 6 states have return successors, (7), 6 states have call predecessors, (7), 3 states have call successors, (7) [2023-02-14 13:03:25,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 35 transitions. [2023-02-14 13:03:25,399 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 35 transitions. Word has length 33 [2023-02-14 13:03:25,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 13:03:25,399 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 35 transitions. [2023-02-14 13:03:25,400 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 17 states have internal predecessors, (41), 7 states have call successors, (7), 1 states have call predecessors, (7), 5 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) [2023-02-14 13:03:25,400 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 35 transitions. [2023-02-14 13:03:25,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2023-02-14 13:03:25,400 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 13:03:25,400 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 13:03:25,409 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-02-14 13:03:25,605 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,SelfDestructingSolverStorable6 [2023-02-14 13:03:25,606 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 13:03:25,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 13:03:25,606 INFO L85 PathProgramCache]: Analyzing trace with hash 780373730, now seen corresponding path program 2 times [2023-02-14 13:03:25,606 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 13:03:25,606 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [792557114] [2023-02-14 13:03:25,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 13:03:25,607 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 13:03:25,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:03:25,765 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:03:25,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:03:25,854 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:03:25,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:03:25,912 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:03:25,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:03:25,953 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:03:25,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:03:25,991 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:03:25,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:03:26,024 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-02-14 13:03:26,024 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 13:03:26,024 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [792557114] [2023-02-14 13:03:26,025 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [792557114] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 13:03:26,025 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [557112474] [2023-02-14 13:03:26,025 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-14 13:03:26,025 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 13:03:26,025 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 13:03:26,029 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) [2023-02-14 13:03:26,032 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-02-14 13:03:26,062 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-14 13:03:26,062 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 13:03:26,063 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 48 conjunts are in the unsatisfiable core [2023-02-14 13:03:26,064 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 13:03:26,220 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-02-14 13:03:26,221 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 13:03:26,874 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-14 13:03:26,875 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [557112474] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 13:03:26,875 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 13:03:26,875 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 18] total 28 [2023-02-14 13:03:26,875 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1411286684] [2023-02-14 13:03:26,875 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 13:03:26,875 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-02-14 13:03:26,876 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 13:03:26,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-02-14 13:03:26,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=668, Unknown=0, NotChecked=0, Total=756 [2023-02-14 13:03:26,877 INFO L87 Difference]: Start difference. First operand 33 states and 35 transitions. Second operand has 28 states, 26 states have (on average 1.8076923076923077) internal successors, (47), 20 states have internal predecessors, (47), 9 states have call successors, (9), 1 states have call predecessors, (9), 6 states have return successors, (11), 8 states have call predecessors, (11), 9 states have call successors, (11) [2023-02-14 13:03:27,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 13:03:27,172 INFO L93 Difference]: Finished difference Result 51 states and 53 transitions. [2023-02-14 13:03:27,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-02-14 13:03:27,173 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 26 states have (on average 1.8076923076923077) internal successors, (47), 20 states have internal predecessors, (47), 9 states have call successors, (9), 1 states have call predecessors, (9), 6 states have return successors, (11), 8 states have call predecessors, (11), 9 states have call successors, (11) Word has length 40 [2023-02-14 13:03:27,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 13:03:27,174 INFO L225 Difference]: With dead ends: 51 [2023-02-14 13:03:27,174 INFO L226 Difference]: Without dead ends: 47 [2023-02-14 13:03:27,175 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 71 SyntacticMatches, 6 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 252 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=163, Invalid=1243, Unknown=0, NotChecked=0, Total=1406 [2023-02-14 13:03:27,175 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 23 mSDsluCounter, 166 mSDsCounter, 0 mSdLazyCounter, 308 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 183 SdHoareTripleChecker+Invalid, 313 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 308 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-14 13:03:27,175 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 183 Invalid, 313 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 308 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-14 13:03:27,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2023-02-14 13:03:27,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 36. [2023-02-14 13:03:27,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 25 states have (on average 1.08) internal successors, (27), 26 states have internal predecessors, (27), 3 states have call successors, (3), 2 states have call predecessors, (3), 7 states have return successors, (8), 7 states have call predecessors, (8), 3 states have call successors, (8) [2023-02-14 13:03:27,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 38 transitions. [2023-02-14 13:03:27,179 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 38 transitions. Word has length 40 [2023-02-14 13:03:27,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 13:03:27,179 INFO L495 AbstractCegarLoop]: Abstraction has 36 states and 38 transitions. [2023-02-14 13:03:27,180 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 26 states have (on average 1.8076923076923077) internal successors, (47), 20 states have internal predecessors, (47), 9 states have call successors, (9), 1 states have call predecessors, (9), 6 states have return successors, (11), 8 states have call predecessors, (11), 9 states have call successors, (11) [2023-02-14 13:03:27,180 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 38 transitions. [2023-02-14 13:03:27,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2023-02-14 13:03:27,180 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 13:03:27,181 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 13:03:27,187 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-02-14 13:03:27,385 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 13:03:27,385 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 13:03:27,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 13:03:27,386 INFO L85 PathProgramCache]: Analyzing trace with hash 866829402, now seen corresponding path program 2 times [2023-02-14 13:03:27,386 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 13:03:27,386 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1055981570] [2023-02-14 13:03:27,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 13:03:27,386 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 13:03:27,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:03:27,499 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:03:27,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:03:27,571 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:03:27,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:03:27,628 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:03:27,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:03:27,691 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:03:27,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:03:27,736 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:03:27,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:03:27,774 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:03:27,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:03:27,805 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-02-14 13:03:27,806 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 13:03:27,806 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1055981570] [2023-02-14 13:03:27,806 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1055981570] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 13:03:27,806 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [201811259] [2023-02-14 13:03:27,806 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-14 13:03:27,806 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 13:03:27,807 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 13:03:27,808 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) [2023-02-14 13:03:27,810 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-02-14 13:03:27,851 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-14 13:03:27,851 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 13:03:27,852 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 56 conjunts are in the unsatisfiable core [2023-02-14 13:03:27,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 13:03:27,994 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-02-14 13:03:27,995 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 13:03:28,803 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-02-14 13:03:28,804 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [201811259] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 13:03:28,804 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 13:03:28,804 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18, 21] total 31 [2023-02-14 13:03:28,804 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1969229963] [2023-02-14 13:03:28,804 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 13:03:28,805 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-02-14 13:03:28,805 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 13:03:28,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-02-14 13:03:28,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=833, Unknown=0, NotChecked=0, Total=930 [2023-02-14 13:03:28,806 INFO L87 Difference]: Start difference. First operand 36 states and 38 transitions. Second operand has 31 states, 29 states have (on average 1.793103448275862) internal successors, (52), 22 states have internal predecessors, (52), 10 states have call successors, (10), 1 states have call predecessors, (10), 7 states have return successors, (13), 9 states have call predecessors, (13), 10 states have call successors, (13) [2023-02-14 13:03:29,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 13:03:29,169 INFO L93 Difference]: Finished difference Result 57 states and 59 transitions. [2023-02-14 13:03:29,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-02-14 13:03:29,169 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 29 states have (on average 1.793103448275862) internal successors, (52), 22 states have internal predecessors, (52), 10 states have call successors, (10), 1 states have call predecessors, (10), 7 states have return successors, (13), 9 states have call predecessors, (13), 10 states have call successors, (13) Word has length 47 [2023-02-14 13:03:29,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 13:03:29,170 INFO L225 Difference]: With dead ends: 57 [2023-02-14 13:03:29,170 INFO L226 Difference]: Without dead ends: 53 [2023-02-14 13:03:29,171 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 87 SyntacticMatches, 5 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 293 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=201, Invalid=1691, Unknown=0, NotChecked=0, Total=1892 [2023-02-14 13:03:29,171 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 40 mSDsluCounter, 202 mSDsCounter, 0 mSdLazyCounter, 406 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 220 SdHoareTripleChecker+Invalid, 420 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 406 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-14 13:03:29,172 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 220 Invalid, 420 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 406 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-14 13:03:29,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2023-02-14 13:03:29,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 39. [2023-02-14 13:03:29,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 27 states have (on average 1.0740740740740742) internal successors, (29), 28 states have internal predecessors, (29), 3 states have call successors, (3), 2 states have call predecessors, (3), 8 states have return successors, (9), 8 states have call predecessors, (9), 3 states have call successors, (9) [2023-02-14 13:03:29,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 41 transitions. [2023-02-14 13:03:29,176 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 41 transitions. Word has length 47 [2023-02-14 13:03:29,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 13:03:29,176 INFO L495 AbstractCegarLoop]: Abstraction has 39 states and 41 transitions. [2023-02-14 13:03:29,176 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 29 states have (on average 1.793103448275862) internal successors, (52), 22 states have internal predecessors, (52), 10 states have call successors, (10), 1 states have call predecessors, (10), 7 states have return successors, (13), 9 states have call predecessors, (13), 10 states have call successors, (13) [2023-02-14 13:03:29,177 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 41 transitions. [2023-02-14 13:03:29,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2023-02-14 13:03:29,177 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 13:03:29,177 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 13:03:29,182 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-02-14 13:03:29,382 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 13:03:29,382 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 13:03:29,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 13:03:29,383 INFO L85 PathProgramCache]: Analyzing trace with hash -1271721844, now seen corresponding path program 3 times [2023-02-14 13:03:29,383 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 13:03:29,383 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [876079007] [2023-02-14 13:03:29,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 13:03:29,383 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 13:03:29,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:03:29,517 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:03:29,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:03:29,602 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:03:29,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:03:29,664 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:03:29,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:03:29,731 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:03:29,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:03:29,782 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:03:29,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:03:29,829 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:03:29,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:03:29,880 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:03:29,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:03:29,926 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2023-02-14 13:03:29,926 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 13:03:29,926 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [876079007] [2023-02-14 13:03:29,926 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [876079007] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 13:03:29,926 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [121323444] [2023-02-14 13:03:29,926 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-14 13:03:29,926 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 13:03:29,927 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 13:03:29,928 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) [2023-02-14 13:03:29,930 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-02-14 13:03:29,967 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-02-14 13:03:29,967 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 13:03:29,968 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 64 conjunts are in the unsatisfiable core [2023-02-14 13:03:29,970 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 13:03:30,171 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2023-02-14 13:03:30,171 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 13:03:31,220 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-02-14 13:03:31,220 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [121323444] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 13:03:31,220 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 13:03:31,220 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20, 24] total 34 [2023-02-14 13:03:31,220 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1611803939] [2023-02-14 13:03:31,220 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 13:03:31,221 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-02-14 13:03:31,221 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 13:03:31,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-02-14 13:03:31,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=1012, Unknown=0, NotChecked=0, Total=1122 [2023-02-14 13:03:31,222 INFO L87 Difference]: Start difference. First operand 39 states and 41 transitions. Second operand has 34 states, 32 states have (on average 1.78125) internal successors, (57), 24 states have internal predecessors, (57), 11 states have call successors, (11), 1 states have call predecessors, (11), 8 states have return successors, (15), 10 states have call predecessors, (15), 11 states have call successors, (15) [2023-02-14 13:03:31,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 13:03:31,657 INFO L93 Difference]: Finished difference Result 63 states and 65 transitions. [2023-02-14 13:03:31,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-02-14 13:03:31,658 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 32 states have (on average 1.78125) internal successors, (57), 24 states have internal predecessors, (57), 11 states have call successors, (11), 1 states have call predecessors, (11), 8 states have return successors, (15), 10 states have call predecessors, (15), 11 states have call successors, (15) Word has length 54 [2023-02-14 13:03:31,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 13:03:31,659 INFO L225 Difference]: With dead ends: 63 [2023-02-14 13:03:31,659 INFO L226 Difference]: Without dead ends: 59 [2023-02-14 13:03:31,659 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 99 SyntacticMatches, 8 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 381 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=228, Invalid=2028, Unknown=0, NotChecked=0, Total=2256 [2023-02-14 13:03:31,660 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 33 mSDsluCounter, 290 mSDsCounter, 0 mSdLazyCounter, 538 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 309 SdHoareTripleChecker+Invalid, 551 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 538 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-14 13:03:31,660 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 309 Invalid, 551 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 538 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-14 13:03:31,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2023-02-14 13:03:31,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 42. [2023-02-14 13:03:31,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 29 states have (on average 1.0689655172413792) internal successors, (31), 30 states have internal predecessors, (31), 3 states have call successors, (3), 2 states have call predecessors, (3), 9 states have return successors, (10), 9 states have call predecessors, (10), 3 states have call successors, (10) [2023-02-14 13:03:31,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 44 transitions. [2023-02-14 13:03:31,664 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 44 transitions. Word has length 54 [2023-02-14 13:03:31,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 13:03:31,664 INFO L495 AbstractCegarLoop]: Abstraction has 42 states and 44 transitions. [2023-02-14 13:03:31,664 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 32 states have (on average 1.78125) internal successors, (57), 24 states have internal predecessors, (57), 11 states have call successors, (11), 1 states have call predecessors, (11), 8 states have return successors, (15), 10 states have call predecessors, (15), 11 states have call successors, (15) [2023-02-14 13:03:31,664 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 44 transitions. [2023-02-14 13:03:31,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2023-02-14 13:03:31,665 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 13:03:31,665 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 13:03:31,671 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-02-14 13:03:31,871 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-02-14 13:03:31,871 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 13:03:31,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 13:03:31,871 INFO L85 PathProgramCache]: Analyzing trace with hash 1194008948, now seen corresponding path program 3 times [2023-02-14 13:03:31,871 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 13:03:31,871 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [826022701] [2023-02-14 13:03:31,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 13:03:31,872 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 13:03:31,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:03:31,981 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:03:31,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:03:32,072 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:03:32,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:03:32,142 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:03:32,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:03:32,202 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:03:32,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:03:32,256 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:03:32,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:03:32,305 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:03:32,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:03:32,348 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:03:32,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:03:32,391 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:03:32,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:03:32,436 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2023-02-14 13:03:32,436 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 13:03:32,436 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [826022701] [2023-02-14 13:03:32,437 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [826022701] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 13:03:32,437 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1258865181] [2023-02-14 13:03:32,437 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-14 13:03:32,437 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 13:03:32,437 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 13:03:32,438 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) [2023-02-14 13:03:32,440 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-02-14 13:03:32,483 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-02-14 13:03:32,483 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 13:03:32,484 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 72 conjunts are in the unsatisfiable core [2023-02-14 13:03:32,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 13:03:32,670 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-02-14 13:03:32,670 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 13:03:33,829 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-02-14 13:03:33,830 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1258865181] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 13:03:33,830 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 13:03:33,830 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 27] total 36 [2023-02-14 13:03:33,830 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2141459859] [2023-02-14 13:03:33,830 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 13:03:33,830 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2023-02-14 13:03:33,831 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 13:03:33,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2023-02-14 13:03:33,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=1145, Unknown=0, NotChecked=0, Total=1260 [2023-02-14 13:03:33,832 INFO L87 Difference]: Start difference. First operand 42 states and 44 transitions. Second operand has 36 states, 35 states have (on average 1.7428571428571429) internal successors, (61), 25 states have internal predecessors, (61), 11 states have call successors, (11), 1 states have call predecessors, (11), 9 states have return successors, (17), 11 states have call predecessors, (17), 11 states have call successors, (17) [2023-02-14 13:03:34,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 13:03:34,391 INFO L93 Difference]: Finished difference Result 69 states and 71 transitions. [2023-02-14 13:03:34,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-02-14 13:03:34,391 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 35 states have (on average 1.7428571428571429) internal successors, (61), 25 states have internal predecessors, (61), 11 states have call successors, (11), 1 states have call predecessors, (11), 9 states have return successors, (17), 11 states have call predecessors, (17), 11 states have call successors, (17) Word has length 61 [2023-02-14 13:03:34,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 13:03:34,391 INFO L225 Difference]: With dead ends: 69 [2023-02-14 13:03:34,391 INFO L226 Difference]: Without dead ends: 65 [2023-02-14 13:03:34,392 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 116 SyntacticMatches, 7 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 362 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=267, Invalid=2489, Unknown=0, NotChecked=0, Total=2756 [2023-02-14 13:03:34,393 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 21 mSDsluCounter, 378 mSDsCounter, 0 mSdLazyCounter, 739 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 398 SdHoareTripleChecker+Invalid, 743 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 739 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-14 13:03:34,393 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 398 Invalid, 743 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 739 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-14 13:03:34,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2023-02-14 13:03:34,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 45. [2023-02-14 13:03:34,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 31 states have (on average 1.064516129032258) internal successors, (33), 32 states have internal predecessors, (33), 3 states have call successors, (3), 2 states have call predecessors, (3), 10 states have return successors, (11), 10 states have call predecessors, (11), 3 states have call successors, (11) [2023-02-14 13:03:34,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 47 transitions. [2023-02-14 13:03:34,396 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 47 transitions. Word has length 61 [2023-02-14 13:03:34,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 13:03:34,397 INFO L495 AbstractCegarLoop]: Abstraction has 45 states and 47 transitions. [2023-02-14 13:03:34,397 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 35 states have (on average 1.7428571428571429) internal successors, (61), 25 states have internal predecessors, (61), 11 states have call successors, (11), 1 states have call predecessors, (11), 9 states have return successors, (17), 11 states have call predecessors, (17), 11 states have call successors, (17) [2023-02-14 13:03:34,397 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 47 transitions. [2023-02-14 13:03:34,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2023-02-14 13:03:34,397 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 13:03:34,398 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 13:03:34,405 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-02-14 13:03:34,605 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 13:03:34,607 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 13:03:34,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 13:03:34,607 INFO L85 PathProgramCache]: Analyzing trace with hash 809184438, now seen corresponding path program 4 times [2023-02-14 13:03:34,607 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 13:03:34,607 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1838920425] [2023-02-14 13:03:34,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 13:03:34,608 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 13:03:34,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:03:34,753 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:03:34,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:03:34,851 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:03:34,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:03:34,920 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:03:34,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:03:34,985 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:03:34,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:03:35,040 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:03:35,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:03:35,092 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:03:35,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:03:35,149 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:03:35,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:03:35,194 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:03:35,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:03:35,237 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:03:35,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:03:35,281 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 0 proven. 52 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2023-02-14 13:03:35,281 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 13:03:35,281 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1838920425] [2023-02-14 13:03:35,282 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1838920425] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 13:03:35,282 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [269759848] [2023-02-14 13:03:35,282 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-14 13:03:35,282 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 13:03:35,282 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 13:03:35,283 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) [2023-02-14 13:03:35,285 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-02-14 13:03:35,328 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-14 13:03:35,328 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 13:03:35,329 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 80 conjunts are in the unsatisfiable core [2023-02-14 13:03:35,331 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 13:03:35,533 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2023-02-14 13:03:35,533 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 13:03:37,031 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 0 proven. 88 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-02-14 13:03:37,031 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [269759848] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 13:03:37,031 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 13:03:37,031 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 24, 30] total 40 [2023-02-14 13:03:37,032 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1392919253] [2023-02-14 13:03:37,032 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 13:03:37,032 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2023-02-14 13:03:37,032 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 13:03:37,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2023-02-14 13:03:37,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=1428, Unknown=0, NotChecked=0, Total=1560 [2023-02-14 13:03:37,033 INFO L87 Difference]: Start difference. First operand 45 states and 47 transitions. Second operand has 40 states, 38 states have (on average 1.763157894736842) internal successors, (67), 28 states have internal predecessors, (67), 13 states have call successors, (13), 1 states have call predecessors, (13), 10 states have return successors, (19), 12 states have call predecessors, (19), 13 states have call successors, (19) [2023-02-14 13:03:37,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 13:03:37,540 INFO L93 Difference]: Finished difference Result 75 states and 77 transitions. [2023-02-14 13:03:37,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-02-14 13:03:37,540 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 38 states have (on average 1.763157894736842) internal successors, (67), 28 states have internal predecessors, (67), 13 states have call successors, (13), 1 states have call predecessors, (13), 10 states have return successors, (19), 12 states have call predecessors, (19), 13 states have call successors, (19) Word has length 68 [2023-02-14 13:03:37,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 13:03:37,541 INFO L225 Difference]: With dead ends: 75 [2023-02-14 13:03:37,541 INFO L226 Difference]: Without dead ends: 71 [2023-02-14 13:03:37,542 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 127 SyntacticMatches, 10 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 534 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=301, Invalid=3005, Unknown=0, NotChecked=0, Total=3306 [2023-02-14 13:03:37,542 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 43 mSDsluCounter, 315 mSDsCounter, 0 mSdLazyCounter, 578 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 336 SdHoareTripleChecker+Invalid, 599 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 578 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-14 13:03:37,542 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 336 Invalid, 599 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 578 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-14 13:03:37,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2023-02-14 13:03:37,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 48. [2023-02-14 13:03:37,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 33 states have (on average 1.0606060606060606) internal successors, (35), 34 states have internal predecessors, (35), 3 states have call successors, (3), 2 states have call predecessors, (3), 11 states have return successors, (12), 11 states have call predecessors, (12), 3 states have call successors, (12) [2023-02-14 13:03:37,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 50 transitions. [2023-02-14 13:03:37,546 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 50 transitions. Word has length 68 [2023-02-14 13:03:37,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 13:03:37,546 INFO L495 AbstractCegarLoop]: Abstraction has 48 states and 50 transitions. [2023-02-14 13:03:37,547 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 38 states have (on average 1.763157894736842) internal successors, (67), 28 states have internal predecessors, (67), 13 states have call successors, (13), 1 states have call predecessors, (13), 10 states have return successors, (19), 12 states have call predecessors, (19), 13 states have call successors, (19) [2023-02-14 13:03:37,547 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 50 transitions. [2023-02-14 13:03:37,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2023-02-14 13:03:37,547 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 13:03:37,547 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 13:03:37,552 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-02-14 13:03:37,752 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 13:03:37,752 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 13:03:37,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 13:03:37,753 INFO L85 PathProgramCache]: Analyzing trace with hash -1512865522, now seen corresponding path program 4 times [2023-02-14 13:03:37,753 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 13:03:37,753 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1674053081] [2023-02-14 13:03:37,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 13:03:37,753 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 13:03:37,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:03:37,894 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:03:37,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:03:38,007 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:03:38,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:03:38,088 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:03:38,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:03:38,151 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:03:38,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:03:38,212 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:03:38,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:03:38,268 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:03:38,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:03:38,324 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:03:38,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:03:38,380 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:03:38,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:03:38,432 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:03:38,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:03:38,479 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:03:38,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:03:38,523 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2023-02-14 13:03:38,524 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 13:03:38,524 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1674053081] [2023-02-14 13:03:38,524 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1674053081] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 13:03:38,524 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [194165339] [2023-02-14 13:03:38,524 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-14 13:03:38,524 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 13:03:38,525 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 13:03:38,526 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) [2023-02-14 13:03:38,527 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-02-14 13:03:38,575 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-14 13:03:38,575 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 13:03:38,577 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 88 conjunts are in the unsatisfiable core [2023-02-14 13:03:38,578 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 13:03:38,778 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2023-02-14 13:03:38,778 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 13:03:40,394 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-02-14 13:03:40,394 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [194165339] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 13:03:40,395 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 13:03:40,395 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26, 33] total 42 [2023-02-14 13:03:40,395 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1695932466] [2023-02-14 13:03:40,395 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 13:03:40,395 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2023-02-14 13:03:40,395 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 13:03:40,396 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2023-02-14 13:03:40,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=1585, Unknown=0, NotChecked=0, Total=1722 [2023-02-14 13:03:40,396 INFO L87 Difference]: Start difference. First operand 48 states and 50 transitions. Second operand has 42 states, 41 states have (on average 1.7317073170731707) internal successors, (71), 29 states have internal predecessors, (71), 13 states have call successors, (13), 1 states have call predecessors, (13), 11 states have return successors, (21), 13 states have call predecessors, (21), 13 states have call successors, (21) [2023-02-14 13:03:41,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 13:03:41,149 INFO L93 Difference]: Finished difference Result 81 states and 83 transitions. [2023-02-14 13:03:41,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-02-14 13:03:41,149 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 41 states have (on average 1.7317073170731707) internal successors, (71), 29 states have internal predecessors, (71), 13 states have call successors, (13), 1 states have call predecessors, (13), 11 states have return successors, (21), 13 states have call predecessors, (21), 13 states have call successors, (21) Word has length 75 [2023-02-14 13:03:41,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 13:03:41,150 INFO L225 Difference]: With dead ends: 81 [2023-02-14 13:03:41,150 INFO L226 Difference]: Without dead ends: 77 [2023-02-14 13:03:41,151 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 144 SyntacticMatches, 9 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 508 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=346, Invalid=3560, Unknown=0, NotChecked=0, Total=3906 [2023-02-14 13:03:41,151 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 47 mSDsluCounter, 468 mSDsCounter, 0 mSdLazyCounter, 920 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 490 SdHoareTripleChecker+Invalid, 938 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 920 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-02-14 13:03:41,152 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 490 Invalid, 938 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 920 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-02-14 13:03:41,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2023-02-14 13:03:41,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 51. [2023-02-14 13:03:41,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 35 states have (on average 1.0571428571428572) internal successors, (37), 36 states have internal predecessors, (37), 3 states have call successors, (3), 2 states have call predecessors, (3), 12 states have return successors, (13), 12 states have call predecessors, (13), 3 states have call successors, (13) [2023-02-14 13:03:41,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 53 transitions. [2023-02-14 13:03:41,158 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 53 transitions. Word has length 75 [2023-02-14 13:03:41,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 13:03:41,158 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 53 transitions. [2023-02-14 13:03:41,158 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 41 states have (on average 1.7317073170731707) internal successors, (71), 29 states have internal predecessors, (71), 13 states have call successors, (13), 1 states have call predecessors, (13), 11 states have return successors, (21), 13 states have call predecessors, (21), 13 states have call successors, (21) [2023-02-14 13:03:41,159 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 53 transitions. [2023-02-14 13:03:41,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2023-02-14 13:03:41,159 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 13:03:41,159 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 13:03:41,166 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-02-14 13:03:41,366 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-02-14 13:03:41,366 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 13:03:41,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 13:03:41,367 INFO L85 PathProgramCache]: Analyzing trace with hash -1531804832, now seen corresponding path program 5 times [2023-02-14 13:03:41,367 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 13:03:41,367 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [913884655] [2023-02-14 13:03:41,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 13:03:41,367 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 13:03:41,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:03:41,532 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:03:41,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:03:41,667 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:03:41,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:03:41,754 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:03:41,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:03:41,832 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:03:41,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:03:41,909 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:03:41,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:03:41,970 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:03:41,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:03:42,027 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:03:42,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:03:42,084 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:03:42,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:03:42,136 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:03:42,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:03:42,186 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:03:42,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:03:42,239 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:03:42,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:03:42,297 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 0 proven. 80 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2023-02-14 13:03:42,298 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 13:03:42,298 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [913884655] [2023-02-14 13:03:42,298 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [913884655] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 13:03:42,298 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1626023229] [2023-02-14 13:03:42,298 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-14 13:03:42,298 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 13:03:42,299 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 13:03:42,301 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-14 13:03:42,303 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-02-14 13:03:42,368 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2023-02-14 13:03:42,369 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 13:03:42,371 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 96 conjunts are in the unsatisfiable core [2023-02-14 13:03:42,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 13:03:42,639 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2023-02-14 13:03:42,639 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 13:03:44,541 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 0 proven. 140 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2023-02-14 13:03:44,541 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1626023229] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 13:03:44,541 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 13:03:44,541 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 28, 36] total 46 [2023-02-14 13:03:44,541 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [974840962] [2023-02-14 13:03:44,542 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 13:03:44,542 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2023-02-14 13:03:44,542 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 13:03:44,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2023-02-14 13:03:44,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=1916, Unknown=0, NotChecked=0, Total=2070 [2023-02-14 13:03:44,543 INFO L87 Difference]: Start difference. First operand 51 states and 53 transitions. Second operand has 46 states, 44 states have (on average 1.75) internal successors, (77), 32 states have internal predecessors, (77), 15 states have call successors, (15), 1 states have call predecessors, (15), 12 states have return successors, (23), 14 states have call predecessors, (23), 15 states have call successors, (23) [2023-02-14 13:03:45,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 13:03:45,207 INFO L93 Difference]: Finished difference Result 87 states and 89 transitions. [2023-02-14 13:03:45,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-02-14 13:03:45,208 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 44 states have (on average 1.75) internal successors, (77), 32 states have internal predecessors, (77), 15 states have call successors, (15), 1 states have call predecessors, (15), 12 states have return successors, (23), 14 states have call predecessors, (23), 15 states have call successors, (23) Word has length 82 [2023-02-14 13:03:45,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 13:03:45,209 INFO L225 Difference]: With dead ends: 87 [2023-02-14 13:03:45,209 INFO L226 Difference]: Without dead ends: 83 [2023-02-14 13:03:45,210 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 155 SyntacticMatches, 12 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 711 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=382, Invalid=4174, Unknown=0, NotChecked=0, Total=4556 [2023-02-14 13:03:45,211 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 24 mSDsluCounter, 440 mSDsCounter, 0 mSdLazyCounter, 822 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 463 SdHoareTripleChecker+Invalid, 824 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 822 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-14 13:03:45,211 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 463 Invalid, 824 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 822 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-14 13:03:45,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2023-02-14 13:03:45,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 54. [2023-02-14 13:03:45,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 37 states have (on average 1.054054054054054) internal successors, (39), 38 states have internal predecessors, (39), 3 states have call successors, (3), 2 states have call predecessors, (3), 13 states have return successors, (14), 13 states have call predecessors, (14), 3 states have call successors, (14) [2023-02-14 13:03:45,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 56 transitions. [2023-02-14 13:03:45,215 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 56 transitions. Word has length 82 [2023-02-14 13:03:45,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 13:03:45,215 INFO L495 AbstractCegarLoop]: Abstraction has 54 states and 56 transitions. [2023-02-14 13:03:45,215 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 44 states have (on average 1.75) internal successors, (77), 32 states have internal predecessors, (77), 15 states have call successors, (15), 1 states have call predecessors, (15), 12 states have return successors, (23), 14 states have call predecessors, (23), 15 states have call successors, (23) [2023-02-14 13:03:45,215 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 56 transitions. [2023-02-14 13:03:45,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2023-02-14 13:03:45,217 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 13:03:45,217 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 13:03:45,224 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-02-14 13:03:45,417 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-02-14 13:03:45,418 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 13:03:45,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 13:03:45,418 INFO L85 PathProgramCache]: Analyzing trace with hash -1881963736, now seen corresponding path program 5 times [2023-02-14 13:03:45,418 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 13:03:45,418 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1617161994] [2023-02-14 13:03:45,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 13:03:45,418 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 13:03:45,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:03:45,571 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:03:45,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:03:45,700 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:03:45,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:03:45,814 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:03:45,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:03:45,899 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:03:45,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:03:45,989 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:03:45,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:03:46,067 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:03:46,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:03:46,136 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:03:46,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:03:46,202 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:03:46,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:03:46,265 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:03:46,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:03:46,341 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:03:46,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:03:46,404 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:03:46,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:03:46,459 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:03:46,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:03:46,509 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 95 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2023-02-14 13:03:46,509 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 13:03:46,509 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1617161994] [2023-02-14 13:03:46,510 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1617161994] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 13:03:46,510 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [684280985] [2023-02-14 13:03:46,510 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-14 13:03:46,510 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 13:03:46,510 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 13:03:46,511 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-14 13:03:46,532 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-02-14 13:03:46,581 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2023-02-14 13:03:46,581 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 13:03:46,583 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 104 conjunts are in the unsatisfiable core [2023-02-14 13:03:46,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 13:03:46,852 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 85 refuted. 0 times theorem prover too weak. 115 trivial. 0 not checked. [2023-02-14 13:03:46,853 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 13:03:49,057 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 170 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-02-14 13:03:49,057 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [684280985] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 13:03:49,058 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 13:03:49,058 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 30, 39] total 48 [2023-02-14 13:03:49,058 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2004244785] [2023-02-14 13:03:49,058 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 13:03:49,059 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2023-02-14 13:03:49,059 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 13:03:49,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2023-02-14 13:03:49,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=2097, Unknown=0, NotChecked=0, Total=2256 [2023-02-14 13:03:49,060 INFO L87 Difference]: Start difference. First operand 54 states and 56 transitions. Second operand has 48 states, 47 states have (on average 1.7234042553191489) internal successors, (81), 33 states have internal predecessors, (81), 15 states have call successors, (15), 1 states have call predecessors, (15), 13 states have return successors, (25), 15 states have call predecessors, (25), 15 states have call successors, (25) [2023-02-14 13:03:49,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 13:03:49,832 INFO L93 Difference]: Finished difference Result 93 states and 95 transitions. [2023-02-14 13:03:49,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-02-14 13:03:49,832 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 47 states have (on average 1.7234042553191489) internal successors, (81), 33 states have internal predecessors, (81), 15 states have call successors, (15), 1 states have call predecessors, (15), 13 states have return successors, (25), 15 states have call predecessors, (25), 15 states have call successors, (25) Word has length 89 [2023-02-14 13:03:49,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 13:03:49,833 INFO L225 Difference]: With dead ends: 93 [2023-02-14 13:03:49,833 INFO L226 Difference]: Without dead ends: 89 [2023-02-14 13:03:49,835 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 171 SyntacticMatches, 12 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 727 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=433, Invalid=4823, Unknown=0, NotChecked=0, Total=5256 [2023-02-14 13:03:49,835 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 41 mSDsluCounter, 414 mSDsCounter, 0 mSdLazyCounter, 835 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 438 SdHoareTripleChecker+Invalid, 850 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 835 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-14 13:03:49,835 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 438 Invalid, 850 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 835 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-14 13:03:49,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2023-02-14 13:03:49,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 57. [2023-02-14 13:03:49,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 39 states have (on average 1.0512820512820513) internal successors, (41), 40 states have internal predecessors, (41), 3 states have call successors, (3), 2 states have call predecessors, (3), 14 states have return successors, (15), 14 states have call predecessors, (15), 3 states have call successors, (15) [2023-02-14 13:03:49,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 59 transitions. [2023-02-14 13:03:49,840 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 59 transitions. Word has length 89 [2023-02-14 13:03:49,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 13:03:49,843 INFO L495 AbstractCegarLoop]: Abstraction has 57 states and 59 transitions. [2023-02-14 13:03:49,844 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 47 states have (on average 1.7234042553191489) internal successors, (81), 33 states have internal predecessors, (81), 15 states have call successors, (15), 1 states have call predecessors, (15), 13 states have return successors, (25), 15 states have call predecessors, (25), 15 states have call successors, (25) [2023-02-14 13:03:49,844 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 59 transitions. [2023-02-14 13:03:49,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2023-02-14 13:03:49,844 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 13:03:49,844 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 13:03:49,851 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2023-02-14 13:03:50,052 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-02-14 13:03:50,052 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 13:03:50,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 13:03:50,052 INFO L85 PathProgramCache]: Analyzing trace with hash 1649915018, now seen corresponding path program 6 times [2023-02-14 13:03:50,052 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 13:03:50,052 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1099856221] [2023-02-14 13:03:50,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 13:03:50,052 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 13:03:50,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:03:50,244 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:03:50,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:03:50,372 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:03:50,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:03:50,498 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:03:50,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:03:50,596 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:03:50,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:03:50,675 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:03:50,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:03:50,753 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:03:50,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:03:50,838 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:03:50,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:03:50,912 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:03:50,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:03:50,979 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:03:50,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:03:51,043 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:03:51,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:03:51,106 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:03:51,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:03:51,168 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:03:51,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:03:51,247 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:03:51,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:03:51,312 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 114 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2023-02-14 13:03:51,313 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 13:03:51,313 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1099856221] [2023-02-14 13:03:51,313 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1099856221] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 13:03:51,313 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [961116913] [2023-02-14 13:03:51,313 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-02-14 13:03:51,313 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 13:03:51,314 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 13:03:51,315 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-14 13:03:51,317 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-02-14 13:03:51,397 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2023-02-14 13:03:51,397 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 13:03:51,400 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 112 conjunts are in the unsatisfiable core [2023-02-14 13:03:51,402 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 13:03:51,668 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 102 refuted. 0 times theorem prover too weak. 138 trivial. 0 not checked. [2023-02-14 13:03:51,668 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 13:03:54,289 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 204 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-02-14 13:03:54,289 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [961116913] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 13:03:54,289 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 13:03:54,289 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 32, 42] total 52 [2023-02-14 13:03:54,289 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2024273189] [2023-02-14 13:03:54,289 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 13:03:54,290 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2023-02-14 13:03:54,290 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 13:03:54,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2023-02-14 13:03:54,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=2476, Unknown=0, NotChecked=0, Total=2652 [2023-02-14 13:03:54,292 INFO L87 Difference]: Start difference. First operand 57 states and 59 transitions. Second operand has 52 states, 50 states have (on average 1.74) internal successors, (87), 36 states have internal predecessors, (87), 17 states have call successors, (17), 1 states have call predecessors, (17), 14 states have return successors, (27), 16 states have call predecessors, (27), 17 states have call successors, (27) [2023-02-14 13:03:55,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 13:03:55,210 INFO L93 Difference]: Finished difference Result 99 states and 101 transitions. [2023-02-14 13:03:55,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-02-14 13:03:55,211 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 50 states have (on average 1.74) internal successors, (87), 36 states have internal predecessors, (87), 17 states have call successors, (17), 1 states have call predecessors, (17), 14 states have return successors, (27), 16 states have call predecessors, (27), 17 states have call successors, (27) Word has length 96 [2023-02-14 13:03:55,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 13:03:55,211 INFO L225 Difference]: With dead ends: 99 [2023-02-14 13:03:55,211 INFO L226 Difference]: Without dead ends: 95 [2023-02-14 13:03:55,213 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 273 GetRequests, 183 SyntacticMatches, 14 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 912 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=471, Invalid=5535, Unknown=0, NotChecked=0, Total=6006 [2023-02-14 13:03:55,213 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 71 mSDsluCounter, 589 mSDsCounter, 0 mSdLazyCounter, 1085 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 614 SdHoareTripleChecker+Invalid, 1115 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 1085 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-02-14 13:03:55,213 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [81 Valid, 614 Invalid, 1115 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 1085 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-02-14 13:03:55,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2023-02-14 13:03:55,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 60. [2023-02-14 13:03:55,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 41 states have (on average 1.048780487804878) internal successors, (43), 42 states have internal predecessors, (43), 3 states have call successors, (3), 2 states have call predecessors, (3), 15 states have return successors, (16), 15 states have call predecessors, (16), 3 states have call successors, (16) [2023-02-14 13:03:55,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 62 transitions. [2023-02-14 13:03:55,216 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 62 transitions. Word has length 96 [2023-02-14 13:03:55,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 13:03:55,216 INFO L495 AbstractCegarLoop]: Abstraction has 60 states and 62 transitions. [2023-02-14 13:03:55,216 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 50 states have (on average 1.74) internal successors, (87), 36 states have internal predecessors, (87), 17 states have call successors, (17), 1 states have call predecessors, (17), 14 states have return successors, (27), 16 states have call predecessors, (27), 17 states have call successors, (27) [2023-02-14 13:03:55,216 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 62 transitions. [2023-02-14 13:03:55,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2023-02-14 13:03:55,217 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 13:03:55,217 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 13:03:55,222 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-02-14 13:03:55,417 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-02-14 13:03:55,418 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 13:03:55,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 13:03:55,418 INFO L85 PathProgramCache]: Analyzing trace with hash -1794979902, now seen corresponding path program 6 times [2023-02-14 13:03:55,418 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 13:03:55,418 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [175902192] [2023-02-14 13:03:55,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 13:03:55,418 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 13:03:55,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:03:55,569 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:03:55,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:03:55,700 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:03:55,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:03:55,808 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:03:55,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:03:55,908 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:03:55,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:03:55,992 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:03:55,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:03:56,069 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:03:56,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:03:56,143 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:03:56,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:03:56,212 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:03:56,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:03:56,283 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:03:56,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:03:56,342 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:03:56,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:03:56,401 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:03:56,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:03:56,458 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:03:56,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:03:56,514 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:03:56,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:03:56,573 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:03:56,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:03:56,630 INFO L134 CoverageAnalysis]: Checked inductivity of 282 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 150 trivial. 0 not checked. [2023-02-14 13:03:56,630 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 13:03:56,630 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [175902192] [2023-02-14 13:03:56,630 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [175902192] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 13:03:56,630 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [553960270] [2023-02-14 13:03:56,631 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-02-14 13:03:56,631 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 13:03:56,631 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 13:03:56,632 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-14 13:03:56,658 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-02-14 13:03:56,734 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2023-02-14 13:03:56,735 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 13:03:56,737 INFO L263 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 120 conjunts are in the unsatisfiable core [2023-02-14 13:03:56,739 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 13:03:57,046 INFO L134 CoverageAnalysis]: Checked inductivity of 282 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 162 trivial. 0 not checked. [2023-02-14 13:03:57,046 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 13:03:59,793 INFO L134 CoverageAnalysis]: Checked inductivity of 282 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2023-02-14 13:03:59,793 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [553960270] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 13:03:59,793 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 13:03:59,797 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34, 45] total 54 [2023-02-14 13:03:59,797 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [793239977] [2023-02-14 13:03:59,797 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 13:03:59,799 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2023-02-14 13:03:59,799 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 13:03:59,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2023-02-14 13:03:59,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=2682, Unknown=0, NotChecked=0, Total=2862 [2023-02-14 13:03:59,801 INFO L87 Difference]: Start difference. First operand 60 states and 62 transitions. Second operand has 54 states, 53 states have (on average 1.7169811320754718) internal successors, (91), 37 states have internal predecessors, (91), 17 states have call successors, (17), 1 states have call predecessors, (17), 15 states have return successors, (29), 17 states have call predecessors, (29), 17 states have call successors, (29) [2023-02-14 13:04:00,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 13:04:00,845 INFO L93 Difference]: Finished difference Result 105 states and 107 transitions. [2023-02-14 13:04:00,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-02-14 13:04:00,845 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 53 states have (on average 1.7169811320754718) internal successors, (91), 37 states have internal predecessors, (91), 17 states have call successors, (17), 1 states have call predecessors, (17), 15 states have return successors, (29), 17 states have call predecessors, (29), 17 states have call successors, (29) Word has length 103 [2023-02-14 13:04:00,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 13:04:00,849 INFO L225 Difference]: With dead ends: 105 [2023-02-14 13:04:00,849 INFO L226 Difference]: Without dead ends: 101 [2023-02-14 13:04:00,850 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 294 GetRequests, 200 SyntacticMatches, 13 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 840 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=527, Invalid=6279, Unknown=0, NotChecked=0, Total=6806 [2023-02-14 13:04:00,851 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 24 mSDsluCounter, 708 mSDsCounter, 0 mSdLazyCounter, 1376 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 734 SdHoareTripleChecker+Invalid, 1383 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 1376 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-02-14 13:04:00,851 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 734 Invalid, 1383 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 1376 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-02-14 13:04:00,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2023-02-14 13:04:00,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 63. [2023-02-14 13:04:00,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 43 states have (on average 1.0465116279069768) internal successors, (45), 44 states have internal predecessors, (45), 3 states have call successors, (3), 2 states have call predecessors, (3), 16 states have return successors, (17), 16 states have call predecessors, (17), 3 states have call successors, (17) [2023-02-14 13:04:00,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 65 transitions. [2023-02-14 13:04:00,860 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 65 transitions. Word has length 103 [2023-02-14 13:04:00,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 13:04:00,861 INFO L495 AbstractCegarLoop]: Abstraction has 63 states and 65 transitions. [2023-02-14 13:04:00,861 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 53 states have (on average 1.7169811320754718) internal successors, (91), 37 states have internal predecessors, (91), 17 states have call successors, (17), 1 states have call predecessors, (17), 15 states have return successors, (29), 17 states have call predecessors, (29), 17 states have call successors, (29) [2023-02-14 13:04:00,861 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 65 transitions. [2023-02-14 13:04:00,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2023-02-14 13:04:00,868 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 13:04:00,868 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 13:04:00,872 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2023-02-14 13:04:01,072 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-02-14 13:04:01,072 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 13:04:01,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 13:04:01,073 INFO L85 PathProgramCache]: Analyzing trace with hash 848388148, now seen corresponding path program 7 times [2023-02-14 13:04:01,073 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 13:04:01,073 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [232371197] [2023-02-14 13:04:01,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 13:04:01,073 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 13:04:01,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:04:01,270 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:04:01,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:04:01,408 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:04:01,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:04:01,529 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:04:01,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:04:01,633 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:04:01,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:04:01,736 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:04:01,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:04:01,832 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:04:01,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:04:01,909 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:04:01,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:04:01,987 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:04:01,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:04:02,064 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:04:02,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:04:02,131 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:04:02,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:04:02,207 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:04:02,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:04:02,266 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:04:02,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:04:02,324 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:04:02,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:04:02,380 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:04:02,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:04:02,435 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:04:02,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:04:02,503 INFO L134 CoverageAnalysis]: Checked inductivity of 329 backedges. 0 proven. 154 refuted. 0 times theorem prover too weak. 175 trivial. 0 not checked. [2023-02-14 13:04:02,503 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 13:04:02,503 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [232371197] [2023-02-14 13:04:02,503 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [232371197] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 13:04:02,504 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [822736521] [2023-02-14 13:04:02,504 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-02-14 13:04:02,504 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 13:04:02,504 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 13:04:02,505 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-14 13:04:02,505 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-02-14 13:04:02,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:04:02,601 INFO L263 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 128 conjunts are in the unsatisfiable core [2023-02-14 13:04:02,602 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 13:04:02,939 INFO L134 CoverageAnalysis]: Checked inductivity of 329 backedges. 0 proven. 140 refuted. 0 times theorem prover too weak. 189 trivial. 0 not checked. [2023-02-14 13:04:02,940 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 13:04:06,043 INFO L134 CoverageAnalysis]: Checked inductivity of 329 backedges. 0 proven. 280 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2023-02-14 13:04:06,043 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [822736521] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 13:04:06,043 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 13:04:06,043 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 36, 48] total 58 [2023-02-14 13:04:06,043 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1080868308] [2023-02-14 13:04:06,043 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 13:04:06,044 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2023-02-14 13:04:06,044 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 13:04:06,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2023-02-14 13:04:06,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=198, Invalid=3108, Unknown=0, NotChecked=0, Total=3306 [2023-02-14 13:04:06,045 INFO L87 Difference]: Start difference. First operand 63 states and 65 transitions. Second operand has 58 states, 56 states have (on average 1.7321428571428572) internal successors, (97), 40 states have internal predecessors, (97), 19 states have call successors, (19), 1 states have call predecessors, (19), 16 states have return successors, (31), 18 states have call predecessors, (31), 19 states have call successors, (31) [2023-02-14 13:04:07,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 13:04:07,151 INFO L93 Difference]: Finished difference Result 111 states and 113 transitions. [2023-02-14 13:04:07,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2023-02-14 13:04:07,152 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 56 states have (on average 1.7321428571428572) internal successors, (97), 40 states have internal predecessors, (97), 19 states have call successors, (19), 1 states have call predecessors, (19), 16 states have return successors, (31), 18 states have call predecessors, (31), 19 states have call successors, (31) Word has length 110 [2023-02-14 13:04:07,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 13:04:07,153 INFO L225 Difference]: With dead ends: 111 [2023-02-14 13:04:07,153 INFO L226 Difference]: Without dead ends: 107 [2023-02-14 13:04:07,154 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 313 GetRequests, 211 SyntacticMatches, 16 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1137 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=568, Invalid=7088, Unknown=0, NotChecked=0, Total=7656 [2023-02-14 13:04:07,155 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 54 mSDsluCounter, 703 mSDsCounter, 0 mSdLazyCounter, 1334 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 730 SdHoareTripleChecker+Invalid, 1355 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 1334 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-02-14 13:04:07,155 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [65 Valid, 730 Invalid, 1355 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 1334 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-02-14 13:04:07,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2023-02-14 13:04:07,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 66. [2023-02-14 13:04:07,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 45 states have (on average 1.0444444444444445) internal successors, (47), 46 states have internal predecessors, (47), 3 states have call successors, (3), 2 states have call predecessors, (3), 17 states have return successors, (18), 17 states have call predecessors, (18), 3 states have call successors, (18) [2023-02-14 13:04:07,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 68 transitions. [2023-02-14 13:04:07,163 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 68 transitions. Word has length 110 [2023-02-14 13:04:07,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 13:04:07,163 INFO L495 AbstractCegarLoop]: Abstraction has 66 states and 68 transitions. [2023-02-14 13:04:07,163 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 56 states have (on average 1.7321428571428572) internal successors, (97), 40 states have internal predecessors, (97), 19 states have call successors, (19), 1 states have call predecessors, (19), 16 states have return successors, (31), 18 states have call predecessors, (31), 19 states have call successors, (31) [2023-02-14 13:04:07,163 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 68 transitions. [2023-02-14 13:04:07,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2023-02-14 13:04:07,165 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 13:04:07,166 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 13:04:07,179 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-02-14 13:04:07,370 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-02-14 13:04:07,371 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 13:04:07,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 13:04:07,371 INFO L85 PathProgramCache]: Analyzing trace with hash 1860234972, now seen corresponding path program 7 times [2023-02-14 13:04:07,371 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 13:04:07,371 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [9372446] [2023-02-14 13:04:07,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 13:04:07,371 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 13:04:07,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:04:07,564 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:04:07,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:04:07,710 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:04:07,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:04:07,839 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:04:07,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:04:07,967 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:04:07,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:04:08,079 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:04:08,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:04:08,173 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:04:08,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:04:08,261 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:04:08,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:04:08,348 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:04:08,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:04:08,425 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:04:08,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:04:08,497 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:04:08,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:04:08,566 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:04:08,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:04:08,641 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:04:08,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:04:08,708 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:04:08,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:04:08,771 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:04:08,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:04:08,842 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:04:08,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:04:08,902 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:04:08,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:04:08,957 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 0 proven. 175 refuted. 0 times theorem prover too weak. 203 trivial. 0 not checked. [2023-02-14 13:04:08,958 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 13:04:08,958 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [9372446] [2023-02-14 13:04:08,958 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [9372446] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 13:04:08,958 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [36042849] [2023-02-14 13:04:08,958 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-02-14 13:04:08,958 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 13:04:08,958 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 13:04:08,959 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-14 13:04:08,960 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-02-14 13:04:09,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:04:09,051 INFO L263 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 136 conjunts are in the unsatisfiable core [2023-02-14 13:04:09,053 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 13:04:09,325 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 0 proven. 161 refuted. 0 times theorem prover too weak. 217 trivial. 0 not checked. [2023-02-14 13:04:09,325 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 13:04:12,778 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 0 proven. 322 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2023-02-14 13:04:12,778 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [36042849] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 13:04:12,778 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 13:04:12,778 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 38, 51] total 60 [2023-02-14 13:04:12,778 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1997772404] [2023-02-14 13:04:12,778 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 13:04:12,779 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2023-02-14 13:04:12,779 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 13:04:12,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2023-02-14 13:04:12,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=203, Invalid=3337, Unknown=0, NotChecked=0, Total=3540 [2023-02-14 13:04:12,781 INFO L87 Difference]: Start difference. First operand 66 states and 68 transitions. Second operand has 60 states, 59 states have (on average 1.7118644067796611) internal successors, (101), 41 states have internal predecessors, (101), 19 states have call successors, (19), 1 states have call predecessors, (19), 17 states have return successors, (33), 19 states have call predecessors, (33), 19 states have call successors, (33) [2023-02-14 13:04:13,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 13:04:13,953 INFO L93 Difference]: Finished difference Result 117 states and 119 transitions. [2023-02-14 13:04:13,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2023-02-14 13:04:13,953 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 59 states have (on average 1.7118644067796611) internal successors, (101), 41 states have internal predecessors, (101), 19 states have call successors, (19), 1 states have call predecessors, (19), 17 states have return successors, (33), 19 states have call predecessors, (33), 19 states have call successors, (33) Word has length 117 [2023-02-14 13:04:13,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 13:04:13,954 INFO L225 Difference]: With dead ends: 117 [2023-02-14 13:04:13,954 INFO L226 Difference]: Without dead ends: 113 [2023-02-14 13:04:13,955 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 334 GetRequests, 227 SyntacticMatches, 16 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1155 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=631, Invalid=7925, Unknown=0, NotChecked=0, Total=8556 [2023-02-14 13:04:13,956 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 42 mSDsluCounter, 697 mSDsCounter, 0 mSdLazyCounter, 1451 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 725 SdHoareTripleChecker+Invalid, 1467 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 1451 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-02-14 13:04:13,956 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 725 Invalid, 1467 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 1451 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-02-14 13:04:13,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2023-02-14 13:04:13,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 69. [2023-02-14 13:04:13,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 47 states have (on average 1.0425531914893618) internal successors, (49), 48 states have internal predecessors, (49), 3 states have call successors, (3), 2 states have call predecessors, (3), 18 states have return successors, (19), 18 states have call predecessors, (19), 3 states have call successors, (19) [2023-02-14 13:04:13,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 71 transitions. [2023-02-14 13:04:13,959 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 71 transitions. Word has length 117 [2023-02-14 13:04:13,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 13:04:13,959 INFO L495 AbstractCegarLoop]: Abstraction has 69 states and 71 transitions. [2023-02-14 13:04:13,959 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 59 states have (on average 1.7118644067796611) internal successors, (101), 41 states have internal predecessors, (101), 19 states have call successors, (19), 1 states have call predecessors, (19), 17 states have return successors, (33), 19 states have call predecessors, (33), 19 states have call successors, (33) [2023-02-14 13:04:13,959 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 71 transitions. [2023-02-14 13:04:13,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2023-02-14 13:04:13,960 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 13:04:13,960 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 13:04:13,965 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2023-02-14 13:04:14,165 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 13:04:14,165 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 13:04:14,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 13:04:14,165 INFO L85 PathProgramCache]: Analyzing trace with hash 23995998, now seen corresponding path program 8 times [2023-02-14 13:04:14,165 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 13:04:14,165 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [716272580] [2023-02-14 13:04:14,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 13:04:14,166 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 13:04:14,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:04:14,375 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:04:14,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:04:14,548 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:04:14,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:04:14,680 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:04:14,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:04:14,806 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:04:14,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:04:14,917 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:04:14,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:04:15,021 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:04:15,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:04:15,122 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:04:15,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:04:15,211 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:04:15,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:04:15,298 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:04:15,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:04:15,384 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:04:15,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:04:15,459 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:04:15,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:04:15,529 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:04:15,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:04:15,597 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:04:15,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:04:15,665 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:04:15,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:04:15,729 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:04:15,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:04:15,793 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:04:15,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:04:15,873 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:04:15,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:04:15,935 INFO L134 CoverageAnalysis]: Checked inductivity of 432 backedges. 0 proven. 200 refuted. 0 times theorem prover too weak. 232 trivial. 0 not checked. [2023-02-14 13:04:15,935 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 13:04:15,935 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [716272580] [2023-02-14 13:04:15,935 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [716272580] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 13:04:15,935 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [54448974] [2023-02-14 13:04:15,935 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-14 13:04:15,935 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 13:04:15,935 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 13:04:15,936 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-14 13:04:15,937 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-02-14 13:04:16,037 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-14 13:04:16,037 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 13:04:16,039 INFO L263 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 144 conjunts are in the unsatisfiable core [2023-02-14 13:04:16,041 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 13:04:16,430 INFO L134 CoverageAnalysis]: Checked inductivity of 432 backedges. 0 proven. 184 refuted. 0 times theorem prover too weak. 248 trivial. 0 not checked. [2023-02-14 13:04:16,430 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 13:04:20,318 INFO L134 CoverageAnalysis]: Checked inductivity of 432 backedges. 0 proven. 368 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2023-02-14 13:04:20,319 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [54448974] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 13:04:20,319 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 13:04:20,319 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 40, 54] total 64 [2023-02-14 13:04:20,319 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1278354088] [2023-02-14 13:04:20,320 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 13:04:20,320 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2023-02-14 13:04:20,320 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 13:04:20,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2023-02-14 13:04:20,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=220, Invalid=3812, Unknown=0, NotChecked=0, Total=4032 [2023-02-14 13:04:20,321 INFO L87 Difference]: Start difference. First operand 69 states and 71 transitions. Second operand has 64 states, 62 states have (on average 1.7258064516129032) internal successors, (107), 44 states have internal predecessors, (107), 21 states have call successors, (21), 1 states have call predecessors, (21), 18 states have return successors, (35), 20 states have call predecessors, (35), 21 states have call successors, (35) [2023-02-14 13:04:21,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 13:04:21,610 INFO L93 Difference]: Finished difference Result 123 states and 125 transitions. [2023-02-14 13:04:21,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2023-02-14 13:04:21,613 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 62 states have (on average 1.7258064516129032) internal successors, (107), 44 states have internal predecessors, (107), 21 states have call successors, (21), 1 states have call predecessors, (21), 18 states have return successors, (35), 20 states have call predecessors, (35), 21 states have call successors, (35) Word has length 124 [2023-02-14 13:04:21,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 13:04:21,614 INFO L225 Difference]: With dead ends: 123 [2023-02-14 13:04:21,614 INFO L226 Difference]: Without dead ends: 119 [2023-02-14 13:04:21,615 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 353 GetRequests, 239 SyntacticMatches, 18 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1386 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=673, Invalid=8833, Unknown=0, NotChecked=0, Total=9506 [2023-02-14 13:04:21,615 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 117 mSDsluCounter, 855 mSDsCounter, 0 mSdLazyCounter, 1658 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 884 SdHoareTripleChecker+Invalid, 1735 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 1658 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-02-14 13:04:21,616 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [129 Valid, 884 Invalid, 1735 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 1658 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-02-14 13:04:21,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2023-02-14 13:04:21,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 72. [2023-02-14 13:04:21,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 49 states have (on average 1.0408163265306123) internal successors, (51), 50 states have internal predecessors, (51), 3 states have call successors, (3), 2 states have call predecessors, (3), 19 states have return successors, (20), 19 states have call predecessors, (20), 3 states have call successors, (20) [2023-02-14 13:04:21,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 74 transitions. [2023-02-14 13:04:21,628 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 74 transitions. Word has length 124 [2023-02-14 13:04:21,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 13:04:21,628 INFO L495 AbstractCegarLoop]: Abstraction has 72 states and 74 transitions. [2023-02-14 13:04:21,629 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 62 states have (on average 1.7258064516129032) internal successors, (107), 44 states have internal predecessors, (107), 21 states have call successors, (21), 1 states have call predecessors, (21), 18 states have return successors, (35), 20 states have call predecessors, (35), 21 states have call successors, (35) [2023-02-14 13:04:21,629 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 74 transitions. [2023-02-14 13:04:21,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2023-02-14 13:04:21,629 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 13:04:21,629 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 13:04:21,635 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-02-14 13:04:21,834 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 13:04:21,835 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 13:04:21,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 13:04:21,835 INFO L85 PathProgramCache]: Analyzing trace with hash 1519753334, now seen corresponding path program 8 times [2023-02-14 13:04:21,835 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 13:04:21,835 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [244832173] [2023-02-14 13:04:21,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 13:04:21,835 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 13:04:21,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:04:22,035 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:04:22,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:04:22,205 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:04:22,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:04:22,382 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:04:22,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:04:22,523 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:04:22,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:04:22,667 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:04:22,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:04:22,822 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:04:22,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:04:22,972 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:04:22,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:04:23,117 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:04:23,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:04:23,212 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:04:23,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:04:23,300 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:04:23,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:04:23,382 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:04:23,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:04:23,460 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:04:23,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:04:23,559 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:04:23,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:04:23,631 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:04:23,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:04:23,698 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:04:23,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:04:23,764 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:04:23,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:04:23,828 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:04:23,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:04:23,896 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:04:23,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:04:23,958 INFO L134 CoverageAnalysis]: Checked inductivity of 488 backedges. 0 proven. 224 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2023-02-14 13:04:23,958 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 13:04:23,958 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [244832173] [2023-02-14 13:04:23,958 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [244832173] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 13:04:23,958 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2087498835] [2023-02-14 13:04:23,958 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-14 13:04:23,958 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 13:04:23,958 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 13:04:23,959 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-14 13:04:23,960 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-02-14 13:04:24,070 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-14 13:04:24,070 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 13:04:24,072 INFO L263 TraceCheckSpWp]: Trace formula consists of 306 conjuncts, 152 conjunts are in the unsatisfiable core [2023-02-14 13:04:24,074 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 13:04:24,428 INFO L134 CoverageAnalysis]: Checked inductivity of 488 backedges. 0 proven. 208 refuted. 0 times theorem prover too weak. 280 trivial. 0 not checked. [2023-02-14 13:04:24,428 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 13:04:28,719 INFO L134 CoverageAnalysis]: Checked inductivity of 488 backedges. 0 proven. 416 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2023-02-14 13:04:28,720 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2087498835] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 13:04:28,720 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 13:04:28,720 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42, 57] total 66 [2023-02-14 13:04:28,720 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [145067659] [2023-02-14 13:04:28,720 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 13:04:28,720 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2023-02-14 13:04:28,720 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 13:04:28,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2023-02-14 13:04:28,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=224, Invalid=4066, Unknown=0, NotChecked=0, Total=4290 [2023-02-14 13:04:28,722 INFO L87 Difference]: Start difference. First operand 72 states and 74 transitions. Second operand has 66 states, 65 states have (on average 1.7076923076923076) internal successors, (111), 45 states have internal predecessors, (111), 21 states have call successors, (21), 1 states have call predecessors, (21), 19 states have return successors, (37), 21 states have call predecessors, (37), 21 states have call successors, (37) [2023-02-14 13:04:30,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 13:04:30,272 INFO L93 Difference]: Finished difference Result 129 states and 131 transitions. [2023-02-14 13:04:30,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2023-02-14 13:04:30,272 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 65 states have (on average 1.7076923076923076) internal successors, (111), 45 states have internal predecessors, (111), 21 states have call successors, (21), 1 states have call predecessors, (21), 19 states have return successors, (37), 21 states have call predecessors, (37), 21 states have call successors, (37) Word has length 131 [2023-02-14 13:04:30,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 13:04:30,275 INFO L225 Difference]: With dead ends: 129 [2023-02-14 13:04:30,275 INFO L226 Difference]: Without dead ends: 125 [2023-02-14 13:04:30,276 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 374 GetRequests, 256 SyntacticMatches, 17 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1292 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=741, Invalid=9765, Unknown=0, NotChecked=0, Total=10506 [2023-02-14 13:04:30,277 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 54 mSDsluCounter, 926 mSDsCounter, 0 mSdLazyCounter, 1903 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 956 SdHoareTripleChecker+Invalid, 1925 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 1903 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-02-14 13:04:30,277 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [59 Valid, 956 Invalid, 1925 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 1903 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-02-14 13:04:30,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2023-02-14 13:04:30,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 75. [2023-02-14 13:04:30,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 51 states have (on average 1.0392156862745099) internal successors, (53), 52 states have internal predecessors, (53), 3 states have call successors, (3), 2 states have call predecessors, (3), 20 states have return successors, (21), 20 states have call predecessors, (21), 3 states have call successors, (21) [2023-02-14 13:04:30,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 77 transitions. [2023-02-14 13:04:30,281 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 77 transitions. Word has length 131 [2023-02-14 13:04:30,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 13:04:30,281 INFO L495 AbstractCegarLoop]: Abstraction has 75 states and 77 transitions. [2023-02-14 13:04:30,281 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 65 states have (on average 1.7076923076923076) internal successors, (111), 45 states have internal predecessors, (111), 21 states have call successors, (21), 1 states have call predecessors, (21), 19 states have return successors, (37), 21 states have call predecessors, (37), 21 states have call successors, (37) [2023-02-14 13:04:30,281 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 77 transitions. [2023-02-14 13:04:30,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2023-02-14 13:04:30,283 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 13:04:30,283 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 13:04:30,288 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2023-02-14 13:04:30,488 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 13:04:30,488 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 13:04:30,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 13:04:30,489 INFO L85 PathProgramCache]: Analyzing trace with hash 128231176, now seen corresponding path program 9 times [2023-02-14 13:04:30,489 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 13:04:30,489 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1202886930] [2023-02-14 13:04:30,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 13:04:30,489 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 13:04:30,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:04:30,732 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:04:30,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:04:30,933 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:04:30,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:04:31,110 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:04:31,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:04:31,255 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:04:31,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:04:31,391 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:04:31,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:04:31,526 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:04:31,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:04:31,644 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:04:31,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:04:31,757 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:04:31,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:04:31,873 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:04:31,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:04:31,968 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:04:31,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:04:32,057 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:04:32,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:04:32,143 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:04:32,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:04:32,225 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:04:32,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:04:32,302 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:04:32,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:04:32,375 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:04:32,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:04:32,447 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:04:32,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:04:32,524 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:04:32,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:04:32,592 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:04:32,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:04:32,661 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:04:32,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:04:32,729 INFO L134 CoverageAnalysis]: Checked inductivity of 549 backedges. 0 proven. 252 refuted. 0 times theorem prover too weak. 297 trivial. 0 not checked. [2023-02-14 13:04:32,729 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 13:04:32,729 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1202886930] [2023-02-14 13:04:32,729 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1202886930] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 13:04:32,729 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1004808731] [2023-02-14 13:04:32,729 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-14 13:04:32,729 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 13:04:32,730 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 13:04:32,731 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-14 13:04:32,732 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-02-14 13:04:32,869 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2023-02-14 13:04:32,869 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 13:04:32,872 INFO L263 TraceCheckSpWp]: Trace formula consists of 321 conjuncts, 160 conjunts are in the unsatisfiable core [2023-02-14 13:04:32,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 13:04:33,250 INFO L134 CoverageAnalysis]: Checked inductivity of 549 backedges. 0 proven. 234 refuted. 0 times theorem prover too weak. 315 trivial. 0 not checked. [2023-02-14 13:04:33,250 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 13:04:38,007 INFO L134 CoverageAnalysis]: Checked inductivity of 549 backedges. 0 proven. 468 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2023-02-14 13:04:38,007 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1004808731] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 13:04:38,007 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 13:04:38,007 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 44, 60] total 70 [2023-02-14 13:04:38,007 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2119937966] [2023-02-14 13:04:38,008 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 13:04:38,008 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 70 states [2023-02-14 13:04:38,008 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 13:04:38,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2023-02-14 13:04:38,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=242, Invalid=4588, Unknown=0, NotChecked=0, Total=4830 [2023-02-14 13:04:38,010 INFO L87 Difference]: Start difference. First operand 75 states and 77 transitions. Second operand has 70 states, 68 states have (on average 1.7205882352941178) internal successors, (117), 48 states have internal predecessors, (117), 23 states have call successors, (23), 1 states have call predecessors, (23), 20 states have return successors, (39), 22 states have call predecessors, (39), 23 states have call successors, (39) [2023-02-14 13:04:39,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 13:04:39,591 INFO L93 Difference]: Finished difference Result 135 states and 137 transitions. [2023-02-14 13:04:39,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2023-02-14 13:04:39,594 INFO L78 Accepts]: Start accepts. Automaton has has 70 states, 68 states have (on average 1.7205882352941178) internal successors, (117), 48 states have internal predecessors, (117), 23 states have call successors, (23), 1 states have call predecessors, (23), 20 states have return successors, (39), 22 states have call predecessors, (39), 23 states have call successors, (39) Word has length 138 [2023-02-14 13:04:39,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 13:04:39,594 INFO L225 Difference]: With dead ends: 135 [2023-02-14 13:04:39,594 INFO L226 Difference]: Without dead ends: 131 [2023-02-14 13:04:39,595 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 393 GetRequests, 267 SyntacticMatches, 20 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1659 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=786, Invalid=10770, Unknown=0, NotChecked=0, Total=11556 [2023-02-14 13:04:39,596 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 101 mSDsluCounter, 935 mSDsCounter, 0 mSdLazyCounter, 1883 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 966 SdHoareTripleChecker+Invalid, 1954 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 1883 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-02-14 13:04:39,596 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [114 Valid, 966 Invalid, 1954 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 1883 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-02-14 13:04:39,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2023-02-14 13:04:39,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 78. [2023-02-14 13:04:39,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 53 states have (on average 1.0377358490566038) internal successors, (55), 54 states have internal predecessors, (55), 3 states have call successors, (3), 2 states have call predecessors, (3), 21 states have return successors, (22), 21 states have call predecessors, (22), 3 states have call successors, (22) [2023-02-14 13:04:39,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 80 transitions. [2023-02-14 13:04:39,599 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 80 transitions. Word has length 138 [2023-02-14 13:04:39,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 13:04:39,600 INFO L495 AbstractCegarLoop]: Abstraction has 78 states and 80 transitions. [2023-02-14 13:04:39,600 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 70 states, 68 states have (on average 1.7205882352941178) internal successors, (117), 48 states have internal predecessors, (117), 23 states have call successors, (23), 1 states have call predecessors, (23), 20 states have return successors, (39), 22 states have call predecessors, (39), 23 states have call successors, (39) [2023-02-14 13:04:39,600 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 80 transitions. [2023-02-14 13:04:39,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2023-02-14 13:04:39,605 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 13:04:39,605 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 13:04:39,615 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-02-14 13:04:39,810 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 13:04:39,810 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 13:04:39,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 13:04:39,811 INFO L85 PathProgramCache]: Analyzing trace with hash -219126640, now seen corresponding path program 9 times [2023-02-14 13:04:39,811 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 13:04:39,811 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2060331490] [2023-02-14 13:04:39,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 13:04:39,811 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 13:04:39,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:04:40,048 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:04:40,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:04:40,248 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:04:40,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:04:40,429 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:04:40,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:04:40,600 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:04:40,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:04:40,749 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:04:40,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:04:40,895 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:04:40,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:04:41,024 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:04:41,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:04:41,156 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:04:41,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:04:41,288 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:04:41,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:04:41,394 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:04:41,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:04:41,493 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:04:41,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:04:41,584 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:04:41,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:04:41,673 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:04:41,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:04:41,772 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:04:41,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:04:41,850 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:04:41,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:04:41,933 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:04:41,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:04:42,007 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:04:42,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:04:42,078 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:04:42,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:04:42,149 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:04:42,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:04:42,220 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:04:42,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:04:42,287 INFO L134 CoverageAnalysis]: Checked inductivity of 612 backedges. 0 proven. 279 refuted. 0 times theorem prover too weak. 333 trivial. 0 not checked. [2023-02-14 13:04:42,287 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 13:04:42,287 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2060331490] [2023-02-14 13:04:42,288 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2060331490] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 13:04:42,288 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [162664406] [2023-02-14 13:04:42,288 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-14 13:04:42,288 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 13:04:42,288 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 13:04:42,289 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-14 13:04:42,291 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-02-14 13:04:42,438 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2023-02-14 13:04:42,438 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 13:04:42,441 WARN L261 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 168 conjunts are in the unsatisfiable core [2023-02-14 13:04:42,443 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 13:04:42,798 INFO L134 CoverageAnalysis]: Checked inductivity of 612 backedges. 0 proven. 261 refuted. 0 times theorem prover too weak. 351 trivial. 0 not checked. [2023-02-14 13:04:42,798 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 13:04:47,876 INFO L134 CoverageAnalysis]: Checked inductivity of 612 backedges. 0 proven. 522 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2023-02-14 13:04:47,876 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [162664406] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 13:04:47,876 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 13:04:47,876 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 46, 63] total 73 [2023-02-14 13:04:47,876 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1873770882] [2023-02-14 13:04:47,877 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 13:04:47,878 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 73 states [2023-02-14 13:04:47,878 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 13:04:47,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2023-02-14 13:04:47,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=251, Invalid=5005, Unknown=0, NotChecked=0, Total=5256 [2023-02-14 13:04:47,880 INFO L87 Difference]: Start difference. First operand 78 states and 80 transitions. Second operand has 73 states, 71 states have (on average 1.7183098591549295) internal successors, (122), 50 states have internal predecessors, (122), 24 states have call successors, (24), 1 states have call predecessors, (24), 21 states have return successors, (41), 23 states have call predecessors, (41), 24 states have call successors, (41) [2023-02-14 13:04:49,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 13:04:49,574 INFO L93 Difference]: Finished difference Result 141 states and 143 transitions. [2023-02-14 13:04:49,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2023-02-14 13:04:49,575 INFO L78 Accepts]: Start accepts. Automaton has has 73 states, 71 states have (on average 1.7183098591549295) internal successors, (122), 50 states have internal predecessors, (122), 24 states have call successors, (24), 1 states have call predecessors, (24), 21 states have return successors, (41), 23 states have call predecessors, (41), 24 states have call successors, (41) Word has length 145 [2023-02-14 13:04:49,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 13:04:49,576 INFO L225 Difference]: With dead ends: 141 [2023-02-14 13:04:49,576 INFO L226 Difference]: Without dead ends: 137 [2023-02-14 13:04:49,577 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 414 GetRequests, 283 SyntacticMatches, 19 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1763 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=866, Invalid=12016, Unknown=0, NotChecked=0, Total=12882 [2023-02-14 13:04:49,578 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 81 mSDsluCounter, 1038 mSDsCounter, 0 mSdLazyCounter, 2143 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 1070 SdHoareTripleChecker+Invalid, 2175 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 2143 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-02-14 13:04:49,578 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [86 Valid, 1070 Invalid, 2175 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 2143 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-02-14 13:04:49,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2023-02-14 13:04:49,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 81. [2023-02-14 13:04:49,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 55 states have (on average 1.0363636363636364) internal successors, (57), 56 states have internal predecessors, (57), 3 states have call successors, (3), 2 states have call predecessors, (3), 22 states have return successors, (23), 22 states have call predecessors, (23), 3 states have call successors, (23) [2023-02-14 13:04:49,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 83 transitions. [2023-02-14 13:04:49,581 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 83 transitions. Word has length 145 [2023-02-14 13:04:49,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 13:04:49,581 INFO L495 AbstractCegarLoop]: Abstraction has 81 states and 83 transitions. [2023-02-14 13:04:49,581 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 73 states, 71 states have (on average 1.7183098591549295) internal successors, (122), 50 states have internal predecessors, (122), 24 states have call successors, (24), 1 states have call predecessors, (24), 21 states have return successors, (41), 23 states have call predecessors, (41), 24 states have call successors, (41) [2023-02-14 13:04:49,581 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 83 transitions. [2023-02-14 13:04:49,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2023-02-14 13:04:49,582 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 13:04:49,582 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 13:04:49,589 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-02-14 13:04:49,787 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 13:04:49,787 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 13:04:49,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 13:04:49,788 INFO L85 PathProgramCache]: Analyzing trace with hash 1955824178, now seen corresponding path program 10 times [2023-02-14 13:04:49,788 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 13:04:49,788 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [214479782] [2023-02-14 13:04:49,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 13:04:49,788 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 13:04:49,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:04:50,064 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:04:50,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:04:50,294 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:04:50,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:04:50,487 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:04:50,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:04:50,670 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:04:50,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:04:50,833 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:04:50,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:04:50,989 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:04:50,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:04:51,129 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:04:51,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:04:51,268 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:04:51,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:04:51,394 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:04:51,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:04:51,512 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:04:51,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:04:51,620 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:04:51,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:04:51,740 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:04:51,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:04:51,847 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:04:51,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:04:51,937 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:04:51,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:04:52,021 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:04:52,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:04:52,103 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:04:52,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:04:52,183 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:04:52,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:04:52,264 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:04:52,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:04:52,345 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:04:52,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:04:52,444 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:04:52,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:04:52,531 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:04:52,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:04:52,604 INFO L134 CoverageAnalysis]: Checked inductivity of 680 backedges. 0 proven. 310 refuted. 0 times theorem prover too weak. 370 trivial. 0 not checked. [2023-02-14 13:04:52,604 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 13:04:52,605 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [214479782] [2023-02-14 13:04:52,605 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [214479782] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 13:04:52,605 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1239848726] [2023-02-14 13:04:52,605 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-14 13:04:52,605 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 13:04:52,605 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 13:04:52,606 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-14 13:04:52,609 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-02-14 13:04:52,765 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-14 13:04:52,765 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 13:04:52,768 WARN L261 TraceCheckSpWp]: Trace formula consists of 351 conjuncts, 176 conjunts are in the unsatisfiable core [2023-02-14 13:04:52,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 13:04:53,184 INFO L134 CoverageAnalysis]: Checked inductivity of 680 backedges. 0 proven. 290 refuted. 0 times theorem prover too weak. 390 trivial. 0 not checked. [2023-02-14 13:04:53,184 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 13:04:58,794 INFO L134 CoverageAnalysis]: Checked inductivity of 680 backedges. 0 proven. 580 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2023-02-14 13:04:58,794 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1239848726] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 13:04:58,794 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 13:04:58,794 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 48, 66] total 76 [2023-02-14 13:04:58,795 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2136325375] [2023-02-14 13:04:58,795 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 13:04:58,795 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 76 states [2023-02-14 13:04:58,795 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 13:04:58,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2023-02-14 13:04:58,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=264, Invalid=5436, Unknown=0, NotChecked=0, Total=5700 [2023-02-14 13:04:58,796 INFO L87 Difference]: Start difference. First operand 81 states and 83 transitions. Second operand has 76 states, 74 states have (on average 1.7162162162162162) internal successors, (127), 52 states have internal predecessors, (127), 25 states have call successors, (25), 1 states have call predecessors, (25), 22 states have return successors, (43), 24 states have call predecessors, (43), 25 states have call successors, (43) [2023-02-14 13:05:00,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 13:05:00,653 INFO L93 Difference]: Finished difference Result 147 states and 149 transitions. [2023-02-14 13:05:00,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2023-02-14 13:05:00,654 INFO L78 Accepts]: Start accepts. Automaton has has 76 states, 74 states have (on average 1.7162162162162162) internal successors, (127), 52 states have internal predecessors, (127), 25 states have call successors, (25), 1 states have call predecessors, (25), 22 states have return successors, (43), 24 states have call predecessors, (43), 25 states have call successors, (43) Word has length 152 [2023-02-14 13:05:00,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 13:05:00,655 INFO L225 Difference]: With dead ends: 147 [2023-02-14 13:05:00,655 INFO L226 Difference]: Without dead ends: 143 [2023-02-14 13:05:00,656 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 433 GetRequests, 295 SyntacticMatches, 22 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1956 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=907, Invalid=12899, Unknown=0, NotChecked=0, Total=13806 [2023-02-14 13:05:00,656 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 45 mSDsluCounter, 1352 mSDsCounter, 0 mSdLazyCounter, 2611 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 1385 SdHoareTripleChecker+Invalid, 2625 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 2611 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-02-14 13:05:00,657 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [59 Valid, 1385 Invalid, 2625 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 2611 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-02-14 13:05:00,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2023-02-14 13:05:00,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 84. [2023-02-14 13:05:00,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 57 states have (on average 1.0350877192982457) internal successors, (59), 58 states have internal predecessors, (59), 3 states have call successors, (3), 2 states have call predecessors, (3), 23 states have return successors, (24), 23 states have call predecessors, (24), 3 states have call successors, (24) [2023-02-14 13:05:00,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 86 transitions. [2023-02-14 13:05:00,660 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 86 transitions. Word has length 152 [2023-02-14 13:05:00,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 13:05:00,660 INFO L495 AbstractCegarLoop]: Abstraction has 84 states and 86 transitions. [2023-02-14 13:05:00,660 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 76 states, 74 states have (on average 1.7162162162162162) internal successors, (127), 52 states have internal predecessors, (127), 25 states have call successors, (25), 1 states have call predecessors, (25), 22 states have return successors, (43), 24 states have call predecessors, (43), 25 states have call successors, (43) [2023-02-14 13:05:00,660 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 86 transitions. [2023-02-14 13:05:00,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2023-02-14 13:05:00,661 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 13:05:00,661 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 13:05:00,674 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2023-02-14 13:05:00,866 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 13:05:00,867 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 13:05:00,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 13:05:00,867 INFO L85 PathProgramCache]: Analyzing trace with hash -1972833494, now seen corresponding path program 10 times [2023-02-14 13:05:00,867 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 13:05:00,867 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1289743276] [2023-02-14 13:05:00,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 13:05:00,867 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 13:05:00,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:05:01,138 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:05:01,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:05:01,376 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:05:01,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:05:01,581 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:05:01,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:05:01,775 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:05:01,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:05:01,947 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:05:01,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:05:02,120 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:05:02,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:05:02,268 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:05:02,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:05:02,413 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:05:02,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:05:02,542 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:05:02,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:05:02,674 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:05:02,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:05:02,804 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:05:02,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:05:02,913 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:05:02,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:05:03,014 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:05:03,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:05:03,112 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:05:03,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:05:03,203 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:05:03,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:05:03,295 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:05:03,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:05:03,377 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:05:03,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:05:03,457 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:05:03,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:05:03,536 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:05:03,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:05:03,613 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:05:03,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:05:03,687 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:05:03,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:05:03,761 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:05:03,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:05:03,831 INFO L134 CoverageAnalysis]: Checked inductivity of 750 backedges. 0 proven. 340 refuted. 0 times theorem prover too weak. 410 trivial. 0 not checked. [2023-02-14 13:05:03,832 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 13:05:03,832 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1289743276] [2023-02-14 13:05:03,832 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1289743276] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 13:05:03,832 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1404237540] [2023-02-14 13:05:03,832 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-14 13:05:03,832 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 13:05:03,832 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 13:05:03,833 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-14 13:05:03,835 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-02-14 13:05:04,007 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-14 13:05:04,007 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 13:05:04,010 WARN L261 TraceCheckSpWp]: Trace formula consists of 366 conjuncts, 184 conjunts are in the unsatisfiable core [2023-02-14 13:05:04,013 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 13:05:04,400 INFO L134 CoverageAnalysis]: Checked inductivity of 750 backedges. 0 proven. 320 refuted. 0 times theorem prover too weak. 430 trivial. 0 not checked. [2023-02-14 13:05:04,401 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 13:05:10,560 INFO L134 CoverageAnalysis]: Checked inductivity of 750 backedges. 0 proven. 640 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2023-02-14 13:05:10,561 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1404237540] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 13:05:10,561 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 13:05:10,562 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50, 69] total 78 [2023-02-14 13:05:10,562 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [418609181] [2023-02-14 13:05:10,563 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 13:05:10,563 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 78 states [2023-02-14 13:05:10,563 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 13:05:10,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2023-02-14 13:05:10,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=269, Invalid=5737, Unknown=0, NotChecked=0, Total=6006 [2023-02-14 13:05:10,564 INFO L87 Difference]: Start difference. First operand 84 states and 86 transitions. Second operand has 78 states, 77 states have (on average 1.7012987012987013) internal successors, (131), 53 states have internal predecessors, (131), 25 states have call successors, (25), 1 states have call predecessors, (25), 23 states have return successors, (45), 25 states have call predecessors, (45), 25 states have call successors, (45) [2023-02-14 13:05:12,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 13:05:12,611 INFO L93 Difference]: Finished difference Result 153 states and 155 transitions. [2023-02-14 13:05:12,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2023-02-14 13:05:12,611 INFO L78 Accepts]: Start accepts. Automaton has has 78 states, 77 states have (on average 1.7012987012987013) internal successors, (131), 53 states have internal predecessors, (131), 25 states have call successors, (25), 1 states have call predecessors, (25), 23 states have return successors, (45), 25 states have call predecessors, (45), 25 states have call successors, (45) Word has length 159 [2023-02-14 13:05:12,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 13:05:12,612 INFO L225 Difference]: With dead ends: 153 [2023-02-14 13:05:12,612 INFO L226 Difference]: Without dead ends: 149 [2023-02-14 13:05:12,614 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 454 GetRequests, 312 SyntacticMatches, 21 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1888 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=988, Invalid=14018, Unknown=0, NotChecked=0, Total=15006 [2023-02-14 13:05:12,614 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 35 mSDsluCounter, 1369 mSDsCounter, 0 mSdLazyCounter, 2676 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 1403 SdHoareTripleChecker+Invalid, 2687 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 2676 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-02-14 13:05:12,614 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 1403 Invalid, 2687 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 2676 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-02-14 13:05:12,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2023-02-14 13:05:12,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 87. [2023-02-14 13:05:12,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 59 states have (on average 1.0338983050847457) internal successors, (61), 60 states have internal predecessors, (61), 3 states have call successors, (3), 2 states have call predecessors, (3), 24 states have return successors, (25), 24 states have call predecessors, (25), 3 states have call successors, (25) [2023-02-14 13:05:12,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 89 transitions. [2023-02-14 13:05:12,619 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 89 transitions. Word has length 159 [2023-02-14 13:05:12,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 13:05:12,620 INFO L495 AbstractCegarLoop]: Abstraction has 87 states and 89 transitions. [2023-02-14 13:05:12,620 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 78 states, 77 states have (on average 1.7012987012987013) internal successors, (131), 53 states have internal predecessors, (131), 25 states have call successors, (25), 1 states have call predecessors, (25), 23 states have return successors, (45), 25 states have call predecessors, (45), 25 states have call successors, (45) [2023-02-14 13:05:12,620 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 89 transitions. [2023-02-14 13:05:12,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2023-02-14 13:05:12,621 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 13:05:12,621 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 12, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 13:05:12,629 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2023-02-14 13:05:12,826 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2023-02-14 13:05:12,827 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 13:05:12,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 13:05:12,827 INFO L85 PathProgramCache]: Analyzing trace with hash -1740548132, now seen corresponding path program 11 times [2023-02-14 13:05:12,827 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 13:05:12,827 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2039498636] [2023-02-14 13:05:12,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 13:05:12,827 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 13:05:12,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:05:13,148 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:05:13,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:05:13,415 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:05:13,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:05:13,636 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:05:13,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:05:13,846 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:05:13,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:05:14,034 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:05:14,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:05:14,223 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:05:14,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:05:14,390 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:05:14,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:05:14,551 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:05:14,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:05:14,695 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:05:14,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:05:14,831 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:05:14,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:05:14,974 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:05:14,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:05:15,094 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:05:15,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:05:15,205 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:05:15,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:05:15,311 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:05:15,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:05:15,410 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:05:15,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:05:15,504 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:05:15,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:05:15,609 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:05:15,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:05:15,703 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:05:15,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:05:15,793 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:05:15,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:05:15,879 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:05:15,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:05:15,964 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:05:15,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:05:16,043 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:05:16,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:05:16,121 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:05:16,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:05:16,197 INFO L134 CoverageAnalysis]: Checked inductivity of 825 backedges. 0 proven. 374 refuted. 0 times theorem prover too weak. 451 trivial. 0 not checked. [2023-02-14 13:05:16,197 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 13:05:16,197 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2039498636] [2023-02-14 13:05:16,197 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2039498636] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 13:05:16,197 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1890671840] [2023-02-14 13:05:16,197 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-14 13:05:16,198 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 13:05:16,198 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 13:05:16,198 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-14 13:05:16,199 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-02-14 13:05:16,394 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2023-02-14 13:05:16,394 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 13:05:16,397 WARN L261 TraceCheckSpWp]: Trace formula consists of 381 conjuncts, 192 conjunts are in the unsatisfiable core [2023-02-14 13:05:16,399 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 13:05:16,845 INFO L134 CoverageAnalysis]: Checked inductivity of 825 backedges. 0 proven. 352 refuted. 0 times theorem prover too weak. 473 trivial. 0 not checked. [2023-02-14 13:05:16,845 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 13:05:23,552 INFO L134 CoverageAnalysis]: Checked inductivity of 825 backedges. 0 proven. 704 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2023-02-14 13:05:23,552 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1890671840] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 13:05:23,552 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 13:05:23,552 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 52, 72] total 82 [2023-02-14 13:05:23,552 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [864417694] [2023-02-14 13:05:23,552 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 13:05:23,553 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 82 states [2023-02-14 13:05:23,553 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 13:05:23,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2023-02-14 13:05:23,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=286, Invalid=6356, Unknown=0, NotChecked=0, Total=6642 [2023-02-14 13:05:23,555 INFO L87 Difference]: Start difference. First operand 87 states and 89 transitions. Second operand has 82 states, 80 states have (on average 1.7125) internal successors, (137), 56 states have internal predecessors, (137), 27 states have call successors, (27), 1 states have call predecessors, (27), 24 states have return successors, (47), 26 states have call predecessors, (47), 27 states have call successors, (47) [2023-02-14 13:05:25,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 13:05:25,728 INFO L93 Difference]: Finished difference Result 159 states and 161 transitions. [2023-02-14 13:05:25,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2023-02-14 13:05:25,729 INFO L78 Accepts]: Start accepts. Automaton has has 82 states, 80 states have (on average 1.7125) internal successors, (137), 56 states have internal predecessors, (137), 27 states have call successors, (27), 1 states have call predecessors, (27), 24 states have return successors, (47), 26 states have call predecessors, (47), 27 states have call successors, (47) Word has length 166 [2023-02-14 13:05:25,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 13:05:25,730 INFO L225 Difference]: With dead ends: 159 [2023-02-14 13:05:25,730 INFO L226 Difference]: Without dead ends: 155 [2023-02-14 13:05:25,731 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 473 GetRequests, 323 SyntacticMatches, 24 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2277 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=1036, Invalid=15220, Unknown=0, NotChecked=0, Total=16256 [2023-02-14 13:05:25,731 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 149 mSDsluCounter, 1480 mSDsCounter, 0 mSdLazyCounter, 2892 mSolverCounterSat, 94 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 164 SdHoareTripleChecker+Valid, 1515 SdHoareTripleChecker+Invalid, 2986 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 2892 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-02-14 13:05:25,732 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [164 Valid, 1515 Invalid, 2986 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [94 Valid, 2892 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-02-14 13:05:25,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2023-02-14 13:05:25,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 90. [2023-02-14 13:05:25,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 61 states have (on average 1.0327868852459017) internal successors, (63), 62 states have internal predecessors, (63), 3 states have call successors, (3), 2 states have call predecessors, (3), 25 states have return successors, (26), 25 states have call predecessors, (26), 3 states have call successors, (26) [2023-02-14 13:05:25,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 92 transitions. [2023-02-14 13:05:25,735 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 92 transitions. Word has length 166 [2023-02-14 13:05:25,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 13:05:25,735 INFO L495 AbstractCegarLoop]: Abstraction has 90 states and 92 transitions. [2023-02-14 13:05:25,735 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 82 states, 80 states have (on average 1.7125) internal successors, (137), 56 states have internal predecessors, (137), 27 states have call successors, (27), 1 states have call predecessors, (27), 24 states have return successors, (47), 26 states have call predecessors, (47), 27 states have call successors, (47) [2023-02-14 13:05:25,735 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 92 transitions. [2023-02-14 13:05:25,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2023-02-14 13:05:25,736 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 13:05:25,736 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 13:05:25,744 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2023-02-14 13:05:25,942 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2023-02-14 13:05:25,942 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 13:05:25,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 13:05:25,942 INFO L85 PathProgramCache]: Analyzing trace with hash 85910596, now seen corresponding path program 11 times [2023-02-14 13:05:25,942 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 13:05:25,942 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1752751696] [2023-02-14 13:05:25,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 13:05:25,943 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 13:05:25,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:05:26,259 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:05:26,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:05:26,541 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:05:26,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:05:26,776 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:05:26,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:05:27,002 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:05:27,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:05:27,206 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:05:27,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:05:27,427 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:05:27,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:05:27,611 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:05:27,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:05:27,778 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:05:27,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:05:27,949 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:05:27,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:05:28,096 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:05:28,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:05:28,233 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:05:28,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:05:28,361 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:05:28,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:05:28,491 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:05:28,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:05:28,606 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:05:28,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:05:28,714 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:05:28,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:05:28,816 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:05:28,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:05:28,912 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:05:28,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:05:29,005 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:05:29,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:05:29,093 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:05:29,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:05:29,180 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:05:29,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:05:29,273 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:05:29,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:05:29,354 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:05:29,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:05:29,433 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:05:29,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:05:29,512 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:05:29,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:05:29,587 INFO L134 CoverageAnalysis]: Checked inductivity of 902 backedges. 0 proven. 407 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2023-02-14 13:05:29,587 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 13:05:29,587 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1752751696] [2023-02-14 13:05:29,587 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1752751696] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 13:05:29,587 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1573279294] [2023-02-14 13:05:29,587 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-14 13:05:29,588 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 13:05:29,588 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 13:05:29,588 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-14 13:05:29,589 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-02-14 13:05:29,808 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2023-02-14 13:05:29,808 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 13:05:29,811 WARN L261 TraceCheckSpWp]: Trace formula consists of 396 conjuncts, 200 conjunts are in the unsatisfiable core [2023-02-14 13:05:29,814 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 13:05:30,242 INFO L134 CoverageAnalysis]: Checked inductivity of 902 backedges. 0 proven. 385 refuted. 0 times theorem prover too weak. 517 trivial. 0 not checked. [2023-02-14 13:05:30,242 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 13:05:37,375 INFO L134 CoverageAnalysis]: Checked inductivity of 902 backedges. 0 proven. 770 refuted. 0 times theorem prover too weak. 132 trivial. 0 not checked. [2023-02-14 13:05:37,375 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1573279294] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 13:05:37,375 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 13:05:37,375 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 54, 75] total 84 [2023-02-14 13:05:37,375 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [170261626] [2023-02-14 13:05:37,375 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 13:05:37,376 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 84 states [2023-02-14 13:05:37,376 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 13:05:37,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2023-02-14 13:05:37,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=290, Invalid=6682, Unknown=0, NotChecked=0, Total=6972 [2023-02-14 13:05:37,377 INFO L87 Difference]: Start difference. First operand 90 states and 92 transitions. Second operand has 84 states, 83 states have (on average 1.6987951807228916) internal successors, (141), 57 states have internal predecessors, (141), 27 states have call successors, (27), 1 states have call predecessors, (27), 25 states have return successors, (49), 27 states have call predecessors, (49), 27 states have call successors, (49) [2023-02-14 13:05:39,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 13:05:39,607 INFO L93 Difference]: Finished difference Result 165 states and 167 transitions. [2023-02-14 13:05:39,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2023-02-14 13:05:39,607 INFO L78 Accepts]: Start accepts. Automaton has has 84 states, 83 states have (on average 1.6987951807228916) internal successors, (141), 57 states have internal predecessors, (141), 27 states have call successors, (27), 1 states have call predecessors, (27), 25 states have return successors, (49), 27 states have call predecessors, (49), 27 states have call successors, (49) Word has length 173 [2023-02-14 13:05:39,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 13:05:39,608 INFO L225 Difference]: With dead ends: 165 [2023-02-14 13:05:39,608 INFO L226 Difference]: Without dead ends: 161 [2023-02-14 13:05:39,609 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 494 GetRequests, 340 SyntacticMatches, 23 SemanticMatches, 131 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2150 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=1122, Invalid=16434, Unknown=0, NotChecked=0, Total=17556 [2023-02-14 13:05:39,610 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 96 mSDsluCounter, 1256 mSDsCounter, 0 mSdLazyCounter, 2531 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 1292 SdHoareTripleChecker+Invalid, 2568 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 2531 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-02-14 13:05:39,610 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [101 Valid, 1292 Invalid, 2568 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 2531 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-02-14 13:05:39,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2023-02-14 13:05:39,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 93. [2023-02-14 13:05:39,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 63 states have (on average 1.0317460317460319) internal successors, (65), 64 states have internal predecessors, (65), 3 states have call successors, (3), 2 states have call predecessors, (3), 26 states have return successors, (27), 26 states have call predecessors, (27), 3 states have call successors, (27) [2023-02-14 13:05:39,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 95 transitions. [2023-02-14 13:05:39,618 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 95 transitions. Word has length 173 [2023-02-14 13:05:39,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 13:05:39,618 INFO L495 AbstractCegarLoop]: Abstraction has 93 states and 95 transitions. [2023-02-14 13:05:39,618 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 84 states, 83 states have (on average 1.6987951807228916) internal successors, (141), 57 states have internal predecessors, (141), 27 states have call successors, (27), 1 states have call predecessors, (27), 25 states have return successors, (49), 27 states have call predecessors, (49), 27 states have call successors, (49) [2023-02-14 13:05:39,619 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 95 transitions. [2023-02-14 13:05:39,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2023-02-14 13:05:39,619 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 13:05:39,619 INFO L195 NwaCegarLoop]: trace histogram [13, 13, 13, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 13:05:39,625 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2023-02-14 13:05:39,820 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2023-02-14 13:05:39,820 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 13:05:39,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 13:05:39,820 INFO L85 PathProgramCache]: Analyzing trace with hash -1923299322, now seen corresponding path program 12 times [2023-02-14 13:05:39,820 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 13:05:39,820 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1249988234] [2023-02-14 13:05:39,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 13:05:39,821 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 13:05:39,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:05:40,165 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:05:40,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:05:40,479 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:05:40,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:05:40,742 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:05:40,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:05:40,975 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:05:40,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:05:41,242 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:05:41,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:05:41,449 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:05:41,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:05:41,644 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:05:41,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:05:41,851 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:05:41,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:05:42,020 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:05:42,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:05:42,180 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:05:42,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:05:42,342 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:05:42,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:05:42,489 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:05:42,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:05:42,623 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:05:42,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:05:42,752 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:05:42,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:05:42,879 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:05:42,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:05:42,991 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:05:42,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:05:43,095 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:05:43,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:05:43,195 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:05:43,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:05:43,290 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:05:43,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:05:43,382 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:05:43,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:05:43,471 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:05:43,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:05:43,558 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:05:43,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:05:43,643 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:05:43,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:05:43,736 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:05:43,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:05:43,819 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:05:43,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:05:43,902 INFO L134 CoverageAnalysis]: Checked inductivity of 984 backedges. 0 proven. 444 refuted. 0 times theorem prover too weak. 540 trivial. 0 not checked. [2023-02-14 13:05:43,902 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 13:05:43,902 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1249988234] [2023-02-14 13:05:43,902 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1249988234] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 13:05:43,902 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1260920561] [2023-02-14 13:05:43,902 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-02-14 13:05:43,902 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 13:05:43,903 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 13:05:43,903 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-14 13:05:43,904 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-02-14 13:05:44,178 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2023-02-14 13:05:44,178 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 13:05:44,181 WARN L261 TraceCheckSpWp]: Trace formula consists of 411 conjuncts, 208 conjunts are in the unsatisfiable core [2023-02-14 13:05:44,184 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 13:05:44,685 INFO L134 CoverageAnalysis]: Checked inductivity of 984 backedges. 0 proven. 420 refuted. 0 times theorem prover too weak. 564 trivial. 0 not checked. [2023-02-14 13:05:44,686 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 13:05:52,426 INFO L134 CoverageAnalysis]: Checked inductivity of 984 backedges. 0 proven. 840 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2023-02-14 13:05:52,426 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1260920561] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 13:05:52,426 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 13:05:52,426 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 56, 78] total 88 [2023-02-14 13:05:52,427 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1487911642] [2023-02-14 13:05:52,427 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 13:05:52,427 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 88 states [2023-02-14 13:05:52,427 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 13:05:52,428 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2023-02-14 13:05:52,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=308, Invalid=7348, Unknown=0, NotChecked=0, Total=7656 [2023-02-14 13:05:52,429 INFO L87 Difference]: Start difference. First operand 93 states and 95 transitions. Second operand has 88 states, 86 states have (on average 1.7093023255813953) internal successors, (147), 60 states have internal predecessors, (147), 29 states have call successors, (29), 1 states have call predecessors, (29), 26 states have return successors, (51), 28 states have call predecessors, (51), 29 states have call successors, (51) [2023-02-14 13:05:54,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 13:05:54,899 INFO L93 Difference]: Finished difference Result 171 states and 173 transitions. [2023-02-14 13:05:54,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2023-02-14 13:05:54,899 INFO L78 Accepts]: Start accepts. Automaton has has 88 states, 86 states have (on average 1.7093023255813953) internal successors, (147), 60 states have internal predecessors, (147), 29 states have call successors, (29), 1 states have call predecessors, (29), 26 states have return successors, (51), 28 states have call predecessors, (51), 29 states have call successors, (51) Word has length 180 [2023-02-14 13:05:54,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 13:05:54,900 INFO L225 Difference]: With dead ends: 171 [2023-02-14 13:05:54,900 INFO L226 Difference]: Without dead ends: 167 [2023-02-14 13:05:54,901 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 513 GetRequests, 351 SyntacticMatches, 26 SemanticMatches, 136 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2622 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=1173, Invalid=17733, Unknown=0, NotChecked=0, Total=18906 [2023-02-14 13:05:54,901 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 139 mSDsluCounter, 1583 mSDsCounter, 0 mSdLazyCounter, 3164 mSolverCounterSat, 96 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 155 SdHoareTripleChecker+Valid, 1620 SdHoareTripleChecker+Invalid, 3260 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 3164 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-02-14 13:05:54,902 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [155 Valid, 1620 Invalid, 3260 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [96 Valid, 3164 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-02-14 13:05:54,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2023-02-14 13:05:54,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 96. [2023-02-14 13:05:54,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 65 states have (on average 1.0307692307692307) internal successors, (67), 66 states have internal predecessors, (67), 3 states have call successors, (3), 2 states have call predecessors, (3), 27 states have return successors, (28), 27 states have call predecessors, (28), 3 states have call successors, (28) [2023-02-14 13:05:54,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 98 transitions. [2023-02-14 13:05:54,907 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 98 transitions. Word has length 180 [2023-02-14 13:05:54,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 13:05:54,907 INFO L495 AbstractCegarLoop]: Abstraction has 96 states and 98 transitions. [2023-02-14 13:05:54,907 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 88 states, 86 states have (on average 1.7093023255813953) internal successors, (147), 60 states have internal predecessors, (147), 29 states have call successors, (29), 1 states have call predecessors, (29), 26 states have return successors, (51), 28 states have call predecessors, (51), 29 states have call successors, (51) [2023-02-14 13:05:54,907 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 98 transitions. [2023-02-14 13:05:54,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2023-02-14 13:05:54,908 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 13:05:54,908 INFO L195 NwaCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 13:05:54,917 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2023-02-14 13:05:55,114 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 13:05:55,114 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 13:05:55,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 13:05:55,114 INFO L85 PathProgramCache]: Analyzing trace with hash 853137374, now seen corresponding path program 12 times [2023-02-14 13:05:55,114 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 13:05:55,114 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [642634865] [2023-02-14 13:05:55,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 13:05:55,115 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 13:05:55,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:05:55,460 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:05:55,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:05:55,769 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:05:55,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:05:56,045 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:05:56,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:05:56,290 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:05:56,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:05:56,534 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:05:56,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:05:56,754 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:05:56,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:05:56,976 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:05:56,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:05:57,172 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:05:57,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:05:57,363 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:05:57,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:05:57,556 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:05:57,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:05:57,730 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:05:57,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:05:57,891 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:05:57,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:05:58,039 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:05:58,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:05:58,188 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:05:58,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:05:58,313 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:05:58,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:05:58,431 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:05:58,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:05:58,546 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:05:58,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:05:58,652 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:05:58,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:05:58,754 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:05:58,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:05:58,861 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:05:58,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:05:58,954 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:05:58,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:05:59,044 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:05:59,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:05:59,132 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:05:59,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:05:59,220 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:05:59,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:05:59,306 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:05:59,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:05:59,392 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:05:59,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:05:59,473 INFO L134 CoverageAnalysis]: Checked inductivity of 1068 backedges. 0 proven. 480 refuted. 0 times theorem prover too weak. 588 trivial. 0 not checked. [2023-02-14 13:05:59,474 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 13:05:59,474 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [642634865] [2023-02-14 13:05:59,474 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [642634865] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 13:05:59,474 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [712864012] [2023-02-14 13:05:59,474 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-02-14 13:05:59,474 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 13:05:59,474 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 13:05:59,475 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-14 13:05:59,476 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-02-14 13:05:59,772 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2023-02-14 13:05:59,772 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 13:05:59,775 INFO L263 TraceCheckSpWp]: Trace formula consists of 426 conjuncts, 164 conjunts are in the unsatisfiable core [2023-02-14 13:05:59,778 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 13:06:02,397 INFO L134 CoverageAnalysis]: Checked inductivity of 1068 backedges. 0 proven. 456 refuted. 0 times theorem prover too weak. 612 trivial. 0 not checked. [2023-02-14 13:06:02,397 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 13:06:58,275 INFO L134 CoverageAnalysis]: Checked inductivity of 1068 backedges. 0 proven. 912 refuted. 0 times theorem prover too weak. 156 trivial. 0 not checked. [2023-02-14 13:06:58,275 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [712864012] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 13:06:58,275 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 13:06:58,275 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 58, 81] total 191 [2023-02-14 13:06:58,275 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1354205905] [2023-02-14 13:06:58,275 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 13:06:58,276 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 191 states [2023-02-14 13:06:58,276 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 13:06:58,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 191 interpolants. [2023-02-14 13:06:58,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=790, Invalid=35500, Unknown=0, NotChecked=0, Total=36290 [2023-02-14 13:06:58,279 INFO L87 Difference]: Start difference. First operand 96 states and 98 transitions. Second operand has 191 states, 190 states have (on average 1.3263157894736841) internal successors, (252), 113 states have internal predecessors, (252), 29 states have call successors, (29), 1 states have call predecessors, (29), 78 states have return successors, (78), 78 states have call predecessors, (78), 29 states have call successors, (78) [2023-02-14 13:07:03,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 13:07:03,255 INFO L93 Difference]: Finished difference Result 177 states and 179 transitions. [2023-02-14 13:07:03,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2023-02-14 13:07:03,255 INFO L78 Accepts]: Start accepts. Automaton has has 191 states, 190 states have (on average 1.3263157894736841) internal successors, (252), 113 states have internal predecessors, (252), 29 states have call successors, (29), 1 states have call predecessors, (29), 78 states have return successors, (78), 78 states have call predecessors, (78), 29 states have call successors, (78) Word has length 187 [2023-02-14 13:07:03,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 13:07:03,256 INFO L225 Difference]: With dead ends: 177 [2023-02-14 13:07:03,256 INFO L226 Difference]: Without dead ends: 173 [2023-02-14 13:07:03,259 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 534 GetRequests, 292 SyntacticMatches, 0 SemanticMatches, 242 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12072 ImplicationChecksByTransitivity, 11.9s TimeCoverageRelationStatistics Valid=1820, Invalid=57472, Unknown=0, NotChecked=0, Total=59292 [2023-02-14 13:07:03,259 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 45 mSDsluCounter, 3196 mSDsCounter, 0 mSdLazyCounter, 6308 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 3234 SdHoareTripleChecker+Invalid, 6317 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 6308 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2023-02-14 13:07:03,259 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 3234 Invalid, 6317 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 6308 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2023-02-14 13:07:03,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2023-02-14 13:07:03,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 99. [2023-02-14 13:07:03,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 67 states have (on average 1.0298507462686568) internal successors, (69), 68 states have internal predecessors, (69), 3 states have call successors, (3), 2 states have call predecessors, (3), 28 states have return successors, (29), 28 states have call predecessors, (29), 3 states have call successors, (29) [2023-02-14 13:07:03,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 101 transitions. [2023-02-14 13:07:03,270 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 101 transitions. Word has length 187 [2023-02-14 13:07:03,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 13:07:03,270 INFO L495 AbstractCegarLoop]: Abstraction has 99 states and 101 transitions. [2023-02-14 13:07:03,270 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 191 states, 190 states have (on average 1.3263157894736841) internal successors, (252), 113 states have internal predecessors, (252), 29 states have call successors, (29), 1 states have call predecessors, (29), 78 states have return successors, (78), 78 states have call predecessors, (78), 29 states have call successors, (78) [2023-02-14 13:07:03,270 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 101 transitions. [2023-02-14 13:07:03,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2023-02-14 13:07:03,271 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 13:07:03,271 INFO L195 NwaCegarLoop]: trace histogram [14, 14, 14, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 13:07:03,278 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2023-02-14 13:07:03,473 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2023-02-14 13:07:03,473 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 13:07:03,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 13:07:03,473 INFO L85 PathProgramCache]: Analyzing trace with hash 1664905904, now seen corresponding path program 13 times [2023-02-14 13:07:03,473 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 13:07:03,475 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [183375971] [2023-02-14 13:07:03,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 13:07:03,475 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 13:07:03,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:07:03,888 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:07:03,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:07:04,211 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:07:04,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:07:04,530 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:07:04,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:07:04,819 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 13:07:04,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat