./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/recursive/Ackermann03.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version b5317dae 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/Ackermann03.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 c244f72db2906c596b7f122d769fc1464836d7d05d9227ee4269773d59ed10bd --- Real Ultimate output --- This is Ultimate 0.2.2-?-b5317da-m [2023-02-16 02:54:50,791 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-02-16 02:54:50,793 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-02-16 02:54:50,826 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-02-16 02:54:50,827 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-02-16 02:54:50,829 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-02-16 02:54:50,831 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-02-16 02:54:50,833 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-02-16 02:54:50,834 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-02-16 02:54:50,838 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-02-16 02:54:50,839 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-02-16 02:54:50,841 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-02-16 02:54:50,841 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-02-16 02:54:50,843 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-02-16 02:54:50,844 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-02-16 02:54:50,845 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-02-16 02:54:50,845 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-02-16 02:54:50,846 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-02-16 02:54:50,847 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-02-16 02:54:50,851 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-02-16 02:54:50,852 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-02-16 02:54:50,853 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-02-16 02:54:50,854 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-02-16 02:54:50,854 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-02-16 02:54:50,861 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-02-16 02:54:50,861 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-02-16 02:54:50,861 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-02-16 02:54:50,863 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-02-16 02:54:50,863 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-02-16 02:54:50,863 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-02-16 02:54:50,864 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-02-16 02:54:50,864 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-02-16 02:54:50,865 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-02-16 02:54:50,866 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-02-16 02:54:50,866 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-02-16 02:54:50,866 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-02-16 02:54:50,867 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-02-16 02:54:50,867 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-02-16 02:54:50,867 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-02-16 02:54:50,868 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-02-16 02:54:50,869 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-02-16 02:54:50,870 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-02-16 02:54:50,895 INFO L113 SettingsManager]: Loading preferences was successful [2023-02-16 02:54:50,895 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-02-16 02:54:50,896 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-02-16 02:54:50,896 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-02-16 02:54:50,897 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-02-16 02:54:50,897 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-02-16 02:54:50,897 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-02-16 02:54:50,897 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-02-16 02:54:50,897 INFO L138 SettingsManager]: * Use SBE=true [2023-02-16 02:54:50,897 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-02-16 02:54:50,898 INFO L138 SettingsManager]: * sizeof long=4 [2023-02-16 02:54:50,898 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-02-16 02:54:50,898 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-02-16 02:54:50,898 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-02-16 02:54:50,899 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-02-16 02:54:50,899 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-02-16 02:54:50,899 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-02-16 02:54:50,899 INFO L138 SettingsManager]: * sizeof long double=12 [2023-02-16 02:54:50,899 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-02-16 02:54:50,899 INFO L138 SettingsManager]: * Use constant arrays=true [2023-02-16 02:54:50,899 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-02-16 02:54:50,899 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-02-16 02:54:50,899 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-02-16 02:54:50,900 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-02-16 02:54:50,900 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-16 02:54:50,900 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-02-16 02:54:50,900 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-02-16 02:54:50,900 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-02-16 02:54:50,900 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-02-16 02:54:50,901 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-02-16 02:54:50,901 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-02-16 02:54:50,901 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-02-16 02:54:50,901 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-02-16 02:54:50,901 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-02-16 02:54:50,901 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-02-16 02:54:50,901 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c244f72db2906c596b7f122d769fc1464836d7d05d9227ee4269773d59ed10bd [2023-02-16 02:54:51,107 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-02-16 02:54:51,127 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-02-16 02:54:51,129 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-02-16 02:54:51,130 INFO L271 PluginConnector]: Initializing CDTParser... [2023-02-16 02:54:51,131 INFO L275 PluginConnector]: CDTParser initialized [2023-02-16 02:54:51,132 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/recursive/Ackermann03.c [2023-02-16 02:54:52,196 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-02-16 02:54:52,351 INFO L351 CDTParser]: Found 1 translation units. [2023-02-16 02:54:52,352 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursive/Ackermann03.c [2023-02-16 02:54:52,357 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d706a0b45/23a9babf645147558d0ef92534d66e4e/FLAG5446625c7 [2023-02-16 02:54:52,372 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d706a0b45/23a9babf645147558d0ef92534d66e4e [2023-02-16 02:54:52,374 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-02-16 02:54:52,376 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-02-16 02:54:52,378 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-02-16 02:54:52,378 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-02-16 02:54:52,381 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-02-16 02:54:52,382 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.02 02:54:52" (1/1) ... [2023-02-16 02:54:52,383 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6a789dc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 02:54:52, skipping insertion in model container [2023-02-16 02:54:52,383 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.02 02:54:52" (1/1) ... [2023-02-16 02:54:52,389 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-02-16 02:54:52,405 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-02-16 02:54:52,530 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/Ackermann03.c[1168,1181] [2023-02-16 02:54:52,534 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-16 02:54:52,544 INFO L203 MainTranslator]: Completed pre-run [2023-02-16 02:54:52,559 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/Ackermann03.c[1168,1181] [2023-02-16 02:54:52,560 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-16 02:54:52,573 INFO L208 MainTranslator]: Completed translation [2023-02-16 02:54:52,573 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 02:54:52 WrapperNode [2023-02-16 02:54:52,573 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-02-16 02:54:52,574 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-02-16 02:54:52,574 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-02-16 02:54:52,574 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-02-16 02:54:52,579 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 02:54:52" (1/1) ... [2023-02-16 02:54:52,584 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 02:54:52" (1/1) ... [2023-02-16 02:54:52,596 INFO L138 Inliner]: procedures = 13, calls = 11, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 32 [2023-02-16 02:54:52,596 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-02-16 02:54:52,597 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-02-16 02:54:52,597 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-02-16 02:54:52,597 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-02-16 02:54:52,604 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 02:54:52" (1/1) ... [2023-02-16 02:54:52,604 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 02:54:52" (1/1) ... [2023-02-16 02:54:52,613 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 02:54:52" (1/1) ... [2023-02-16 02:54:52,614 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 02:54:52" (1/1) ... [2023-02-16 02:54:52,621 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 02:54:52" (1/1) ... [2023-02-16 02:54:52,625 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 02:54:52" (1/1) ... [2023-02-16 02:54:52,626 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 02:54:52" (1/1) ... [2023-02-16 02:54:52,627 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 02:54:52" (1/1) ... [2023-02-16 02:54:52,628 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-02-16 02:54:52,628 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-02-16 02:54:52,628 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-02-16 02:54:52,628 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-02-16 02:54:52,629 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 02:54:52" (1/1) ... [2023-02-16 02:54:52,635 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-16 02:54:52,645 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 02:54:52,655 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) [2023-02-16 02:54:52,671 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 [2023-02-16 02:54:52,683 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-02-16 02:54:52,683 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-02-16 02:54:52,683 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-02-16 02:54:52,683 INFO L130 BoogieDeclarations]: Found specification of procedure ackermann [2023-02-16 02:54:52,683 INFO L138 BoogieDeclarations]: Found implementation of procedure ackermann [2023-02-16 02:54:52,684 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-02-16 02:54:52,726 INFO L235 CfgBuilder]: Building ICFG [2023-02-16 02:54:52,727 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2023-02-16 02:54:52,876 INFO L276 CfgBuilder]: Performing block encoding [2023-02-16 02:54:52,880 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-02-16 02:54:52,880 INFO L300 CfgBuilder]: Removed 0 assume(true) statements. [2023-02-16 02:54:52,881 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.02 02:54:52 BoogieIcfgContainer [2023-02-16 02:54:52,882 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-02-16 02:54:52,883 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-02-16 02:54:52,896 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-02-16 02:54:52,899 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-02-16 02:54:52,899 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.02 02:54:52" (1/3) ... [2023-02-16 02:54:52,900 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3eeae346 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.02 02:54:52, skipping insertion in model container [2023-02-16 02:54:52,900 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 02:54:52" (2/3) ... [2023-02-16 02:54:52,900 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3eeae346 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.02 02:54:52, skipping insertion in model container [2023-02-16 02:54:52,900 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.02 02:54:52" (3/3) ... [2023-02-16 02:54:52,901 INFO L112 eAbstractionObserver]: Analyzing ICFG Ackermann03.c [2023-02-16 02:54:52,914 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-02-16 02:54:52,924 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-02-16 02:54:53,021 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-02-16 02:54:53,026 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;@5fdfe108, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-02-16 02:54:53,040 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-02-16 02:54:53,044 INFO L276 IsEmpty]: Start isEmpty. Operand has 23 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-02-16 02:54:53,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-02-16 02:54:53,049 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 02:54:53,050 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 02:54:53,050 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 02:54:53,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 02:54:53,058 INFO L85 PathProgramCache]: Analyzing trace with hash 1470704041, now seen corresponding path program 1 times [2023-02-16 02:54:53,079 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 02:54:53,080 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1895503051] [2023-02-16 02:54:53,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 02:54:53,081 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 02:54:53,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:54:53,300 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-16 02:54:53,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:54:53,362 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 02:54:53,363 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 02:54:53,363 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1895503051] [2023-02-16 02:54:53,364 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1895503051] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-16 02:54:53,364 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-16 02:54:53,364 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-16 02:54:53,365 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1720570202] [2023-02-16 02:54:53,366 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-16 02:54:53,369 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-16 02:54:53,370 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 02:54:53,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-16 02:54:53,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-02-16 02:54:53,402 INFO L87 Difference]: Start difference. First operand has 23 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 5 states, 5 states have (on average 2.0) internal successors, (10), 5 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) [2023-02-16 02:54:53,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 02:54:53,516 INFO L93 Difference]: Finished difference Result 51 states and 72 transitions. [2023-02-16 02:54:53,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-02-16 02:54:53,519 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 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 [2023-02-16 02:54:53,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 02:54:53,531 INFO L225 Difference]: With dead ends: 51 [2023-02-16 02:54:53,531 INFO L226 Difference]: Without dead ends: 25 [2023-02-16 02:54:53,534 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-02-16 02:54:53,537 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 15 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-16 02:54:53,538 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 72 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-16 02:54:53,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2023-02-16 02:54:53,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2023-02-16 02:54:53,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 17 states have (on average 1.1176470588235294) internal successors, (19), 17 states have internal predecessors, (19), 5 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (8), 6 states have call predecessors, (8), 5 states have call successors, (8) [2023-02-16 02:54:53,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 32 transitions. [2023-02-16 02:54:53,568 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 32 transitions. Word has length 12 [2023-02-16 02:54:53,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 02:54:53,569 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 32 transitions. [2023-02-16 02:54:53,569 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 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) [2023-02-16 02:54:53,569 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 32 transitions. [2023-02-16 02:54:53,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-02-16 02:54:53,572 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 02:54:53,572 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 02:54:53,572 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-02-16 02:54:53,573 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 02:54:53,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 02:54:53,574 INFO L85 PathProgramCache]: Analyzing trace with hash 941922339, now seen corresponding path program 1 times [2023-02-16 02:54:53,574 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 02:54:53,574 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2024533717] [2023-02-16 02:54:53,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 02:54:53,574 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 02:54:53,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:54:53,646 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-16 02:54:53,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:54:53,684 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-16 02:54:53,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:54:53,692 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-16 02:54:53,692 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 02:54:53,692 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2024533717] [2023-02-16 02:54:53,693 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2024533717] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 02:54:53,693 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [37327243] [2023-02-16 02:54:53,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 02:54:53,693 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 02:54:53,693 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 02:54:53,696 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) [2023-02-16 02:54:53,697 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-02-16 02:54:53,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:54:53,745 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 4 conjunts are in the unsatisfiable core [2023-02-16 02:54:53,749 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 02:54:53,821 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-16 02:54:53,821 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 02:54:53,915 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-16 02:54:53,919 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [37327243] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 02:54:53,919 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-16 02:54:53,919 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2023-02-16 02:54:53,921 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2060974450] [2023-02-16 02:54:53,921 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-16 02:54:53,922 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-02-16 02:54:53,922 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 02:54:53,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-02-16 02:54:53,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2023-02-16 02:54:53,923 INFO L87 Difference]: Start difference. First operand 25 states and 32 transitions. Second operand has 10 states, 10 states have (on average 2.7) internal successors, (27), 10 states have internal predecessors, (27), 4 states have call successors, (4), 1 states have call predecessors, (4), 4 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) [2023-02-16 02:54:54,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 02:54:54,053 INFO L93 Difference]: Finished difference Result 74 states and 126 transitions. [2023-02-16 02:54:54,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-02-16 02:54:54,053 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.7) internal successors, (27), 10 states have internal predecessors, (27), 4 states have call successors, (4), 1 states have call predecessors, (4), 4 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) Word has length 19 [2023-02-16 02:54:54,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 02:54:54,055 INFO L225 Difference]: With dead ends: 74 [2023-02-16 02:54:54,055 INFO L226 Difference]: Without dead ends: 50 [2023-02-16 02:54:54,056 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2023-02-16 02:54:54,057 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 21 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 111 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-16 02:54:54,057 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 91 Invalid, 131 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 111 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-16 02:54:54,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2023-02-16 02:54:54,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2023-02-16 02:54:54,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 33 states have (on average 1.1818181818181819) internal successors, (39), 34 states have internal predecessors, (39), 10 states have call successors, (10), 3 states have call predecessors, (10), 6 states have return successors, (27), 12 states have call predecessors, (27), 10 states have call successors, (27) [2023-02-16 02:54:54,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 76 transitions. [2023-02-16 02:54:54,065 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 76 transitions. Word has length 19 [2023-02-16 02:54:54,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 02:54:54,066 INFO L495 AbstractCegarLoop]: Abstraction has 50 states and 76 transitions. [2023-02-16 02:54:54,066 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.7) internal successors, (27), 10 states have internal predecessors, (27), 4 states have call successors, (4), 1 states have call predecessors, (4), 4 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) [2023-02-16 02:54:54,066 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 76 transitions. [2023-02-16 02:54:54,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2023-02-16 02:54:54,068 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 02:54:54,068 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 02:54:54,076 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-02-16 02:54:54,275 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 02:54:54,275 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 02:54:54,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 02:54:54,276 INFO L85 PathProgramCache]: Analyzing trace with hash -574784801, now seen corresponding path program 1 times [2023-02-16 02:54:54,276 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 02:54:54,276 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1501202273] [2023-02-16 02:54:54,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 02:54:54,276 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 02:54:54,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:54:54,406 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-16 02:54:54,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:54:54,480 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-16 02:54:54,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:54:54,545 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-16 02:54:54,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:54:54,564 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-16 02:54:54,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:54:54,584 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-02-16 02:54:54,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:54:54,591 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2023-02-16 02:54:54,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:54:54,599 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 6 proven. 27 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2023-02-16 02:54:54,599 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 02:54:54,600 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1501202273] [2023-02-16 02:54:54,601 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1501202273] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 02:54:54,602 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [247053010] [2023-02-16 02:54:54,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 02:54:54,604 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 02:54:54,604 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 02:54:54,605 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) [2023-02-16 02:54:54,633 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-02-16 02:54:54,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:54:54,662 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 10 conjunts are in the unsatisfiable core [2023-02-16 02:54:54,664 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 02:54:54,735 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 6 proven. 24 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2023-02-16 02:54:54,736 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 02:54:55,127 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 6 proven. 27 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2023-02-16 02:54:55,127 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [247053010] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 02:54:55,127 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-16 02:54:55,127 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 7] total 11 [2023-02-16 02:54:55,127 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [843529312] [2023-02-16 02:54:55,127 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-16 02:54:55,128 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-02-16 02:54:55,128 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 02:54:55,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-02-16 02:54:55,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2023-02-16 02:54:55,129 INFO L87 Difference]: Start difference. First operand 50 states and 76 transitions. Second operand has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 5 states have call successors, (8), 1 states have call predecessors, (8), 4 states have return successors, (8), 2 states have call predecessors, (8), 5 states have call successors, (8) [2023-02-16 02:54:55,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 02:54:55,229 INFO L93 Difference]: Finished difference Result 120 states and 227 transitions. [2023-02-16 02:54:55,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-02-16 02:54:55,230 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 5 states have call successors, (8), 1 states have call predecessors, (8), 4 states have return successors, (8), 2 states have call predecessors, (8), 5 states have call successors, (8) Word has length 45 [2023-02-16 02:54:55,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 02:54:55,232 INFO L225 Difference]: With dead ends: 120 [2023-02-16 02:54:55,232 INFO L226 Difference]: Without dead ends: 53 [2023-02-16 02:54:55,234 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 96 SyntacticMatches, 5 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=116, Unknown=0, NotChecked=0, Total=182 [2023-02-16 02:54:55,234 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 47 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-16 02:54:55,234 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 81 Invalid, 123 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-16 02:54:55,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2023-02-16 02:54:55,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2023-02-16 02:54:55,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 36 states have (on average 1.1111111111111112) internal successors, (40), 37 states have internal predecessors, (40), 8 states have call successors, (8), 4 states have call predecessors, (8), 8 states have return successors, (28), 11 states have call predecessors, (28), 8 states have call successors, (28) [2023-02-16 02:54:55,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 76 transitions. [2023-02-16 02:54:55,242 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 76 transitions. Word has length 45 [2023-02-16 02:54:55,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 02:54:55,243 INFO L495 AbstractCegarLoop]: Abstraction has 53 states and 76 transitions. [2023-02-16 02:54:55,243 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 5 states have call successors, (8), 1 states have call predecessors, (8), 4 states have return successors, (8), 2 states have call predecessors, (8), 5 states have call successors, (8) [2023-02-16 02:54:55,243 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 76 transitions. [2023-02-16 02:54:55,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2023-02-16 02:54:55,246 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 02:54:55,246 INFO L195 NwaCegarLoop]: trace histogram [17, 17, 11, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 02:54:55,265 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-02-16 02:54:55,451 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2023-02-16 02:54:55,451 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 02:54:55,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 02:54:55,452 INFO L85 PathProgramCache]: Analyzing trace with hash 2049356910, now seen corresponding path program 2 times [2023-02-16 02:54:55,452 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 02:54:55,452 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1361366763] [2023-02-16 02:54:55,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 02:54:55,452 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 02:54:55,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:54:55,617 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-16 02:54:55,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:54:55,763 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-16 02:54:55,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:54:55,860 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-16 02:54:55,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:54:55,898 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-16 02:54:55,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:54:55,925 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-16 02:54:55,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:54:55,943 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-16 02:54:55,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:54:55,968 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-02-16 02:54:55,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:54:55,972 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2023-02-16 02:54:55,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:54:56,007 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-16 02:54:56,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:54:56,049 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-16 02:54:56,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:54:56,064 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-16 02:54:56,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:54:56,078 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-02-16 02:54:56,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:54:56,082 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2023-02-16 02:54:56,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:54:56,089 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-16 02:54:56,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:54:56,093 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-16 02:54:56,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:54:56,097 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-16 02:54:56,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:54:56,099 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-02-16 02:54:56,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:54:56,102 INFO L134 CoverageAnalysis]: Checked inductivity of 669 backedges. 127 proven. 266 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2023-02-16 02:54:56,102 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 02:54:56,102 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1361366763] [2023-02-16 02:54:56,103 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1361366763] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 02:54:56,103 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [76175887] [2023-02-16 02:54:56,103 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-16 02:54:56,103 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 02:54:56,103 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 02:54:56,104 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) [2023-02-16 02:54:56,107 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-02-16 02:54:56,179 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-16 02:54:56,180 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-16 02:54:56,181 INFO L263 TraceCheckSpWp]: Trace formula consists of 372 conjuncts, 17 conjunts are in the unsatisfiable core [2023-02-16 02:54:56,186 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 02:54:56,311 INFO L134 CoverageAnalysis]: Checked inductivity of 669 backedges. 360 proven. 86 refuted. 0 times theorem prover too weak. 223 trivial. 0 not checked. [2023-02-16 02:54:56,311 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 02:54:57,455 INFO L134 CoverageAnalysis]: Checked inductivity of 669 backedges. 115 proven. 179 refuted. 0 times theorem prover too weak. 375 trivial. 0 not checked. [2023-02-16 02:54:57,456 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [76175887] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 02:54:57,456 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-16 02:54:57,456 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 15] total 33 [2023-02-16 02:54:57,456 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1513729420] [2023-02-16 02:54:57,456 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-16 02:54:57,457 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-02-16 02:54:57,457 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 02:54:57,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-02-16 02:54:57,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=950, Unknown=0, NotChecked=0, Total=1056 [2023-02-16 02:54:57,458 INFO L87 Difference]: Start difference. First operand 53 states and 76 transitions. Second operand has 33 states, 33 states have (on average 2.3333333333333335) internal successors, (77), 27 states have internal predecessors, (77), 11 states have call successors, (18), 2 states have call predecessors, (18), 15 states have return successors, (33), 19 states have call predecessors, (33), 11 states have call successors, (33) [2023-02-16 02:54:58,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 02:54:58,158 INFO L93 Difference]: Finished difference Result 126 states and 253 transitions. [2023-02-16 02:54:58,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-02-16 02:54:58,159 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.3333333333333335) internal successors, (77), 27 states have internal predecessors, (77), 11 states have call successors, (18), 2 states have call predecessors, (18), 15 states have return successors, (33), 19 states have call predecessors, (33), 11 states have call successors, (33) Word has length 119 [2023-02-16 02:54:58,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 02:54:58,161 INFO L225 Difference]: With dead ends: 126 [2023-02-16 02:54:58,161 INFO L226 Difference]: Without dead ends: 78 [2023-02-16 02:54:58,163 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 310 GetRequests, 249 SyntacticMatches, 4 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 587 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=587, Invalid=2835, Unknown=0, NotChecked=0, Total=3422 [2023-02-16 02:54:58,164 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 68 mSDsluCounter, 158 mSDsCounter, 0 mSdLazyCounter, 548 mSolverCounterSat, 152 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 178 SdHoareTripleChecker+Invalid, 700 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 152 IncrementalHoareTripleChecker+Valid, 548 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-16 02:54:58,164 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [68 Valid, 178 Invalid, 700 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [152 Valid, 548 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-16 02:54:58,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2023-02-16 02:54:58,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 77. [2023-02-16 02:54:58,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 52 states have (on average 1.1153846153846154) internal successors, (58), 53 states have internal predecessors, (58), 13 states have call successors, (13), 7 states have call predecessors, (13), 11 states have return successors, (46), 16 states have call predecessors, (46), 13 states have call successors, (46) [2023-02-16 02:54:58,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 117 transitions. [2023-02-16 02:54:58,174 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 117 transitions. Word has length 119 [2023-02-16 02:54:58,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 02:54:58,174 INFO L495 AbstractCegarLoop]: Abstraction has 77 states and 117 transitions. [2023-02-16 02:54:58,174 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.3333333333333335) internal successors, (77), 27 states have internal predecessors, (77), 11 states have call successors, (18), 2 states have call predecessors, (18), 15 states have return successors, (33), 19 states have call predecessors, (33), 11 states have call successors, (33) [2023-02-16 02:54:58,175 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 117 transitions. [2023-02-16 02:54:58,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2023-02-16 02:54:58,177 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 02:54:58,177 INFO L195 NwaCegarLoop]: trace histogram [17, 17, 10, 7, 6, 6, 6, 6, 6, 6, 6, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 02:54:58,200 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-02-16 02:54:58,399 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 02:54:58,399 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 02:54:58,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 02:54:58,400 INFO L85 PathProgramCache]: Analyzing trace with hash -270180431, now seen corresponding path program 3 times [2023-02-16 02:54:58,400 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 02:54:58,400 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [321891117] [2023-02-16 02:54:58,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 02:54:58,401 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 02:54:58,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:54:58,529 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-16 02:54:58,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:54:58,620 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-16 02:54:58,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:54:58,676 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-16 02:54:58,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:54:58,681 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-16 02:54:58,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:54:58,685 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-16 02:54:58,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:54:58,687 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-16 02:54:58,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:54:58,690 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-02-16 02:54:58,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:54:58,692 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2023-02-16 02:54:58,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:54:58,714 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-16 02:54:58,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:54:58,730 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-16 02:54:58,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:54:58,751 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-02-16 02:54:58,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:54:58,769 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2023-02-16 02:54:58,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:54:58,813 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-16 02:54:58,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:54:58,837 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-16 02:54:58,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:54:58,868 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-16 02:54:58,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:54:58,871 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-02-16 02:54:58,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:54:58,874 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2023-02-16 02:54:58,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:54:58,876 INFO L134 CoverageAnalysis]: Checked inductivity of 661 backedges. 249 proven. 113 refuted. 0 times theorem prover too weak. 299 trivial. 0 not checked. [2023-02-16 02:54:58,876 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 02:54:58,876 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [321891117] [2023-02-16 02:54:58,877 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [321891117] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 02:54:58,877 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1350670832] [2023-02-16 02:54:58,877 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-16 02:54:58,877 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 02:54:58,877 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 02:54:58,878 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) [2023-02-16 02:54:58,880 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-02-16 02:54:58,955 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2023-02-16 02:54:58,955 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-16 02:54:58,957 INFO L263 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 21 conjunts are in the unsatisfiable core [2023-02-16 02:54:58,960 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 02:54:59,023 INFO L134 CoverageAnalysis]: Checked inductivity of 661 backedges. 236 proven. 115 refuted. 0 times theorem prover too weak. 310 trivial. 0 not checked. [2023-02-16 02:54:59,024 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 02:55:00,010 INFO L134 CoverageAnalysis]: Checked inductivity of 661 backedges. 252 proven. 113 refuted. 0 times theorem prover too weak. 296 trivial. 0 not checked. [2023-02-16 02:55:00,011 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1350670832] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 02:55:00,011 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-16 02:55:00,011 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13, 16] total 23 [2023-02-16 02:55:00,011 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [421542134] [2023-02-16 02:55:00,011 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-16 02:55:00,012 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-02-16 02:55:00,012 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 02:55:00,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-02-16 02:55:00,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2023-02-16 02:55:00,013 INFO L87 Difference]: Start difference. First operand 77 states and 117 transitions. Second operand has 23 states, 23 states have (on average 2.739130434782609) internal successors, (63), 21 states have internal predecessors, (63), 11 states have call successors, (14), 1 states have call predecessors, (14), 12 states have return successors, (23), 10 states have call predecessors, (23), 11 states have call successors, (23) [2023-02-16 02:55:00,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 02:55:00,288 INFO L93 Difference]: Finished difference Result 168 states and 314 transitions. [2023-02-16 02:55:00,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-02-16 02:55:00,289 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.739130434782609) internal successors, (63), 21 states have internal predecessors, (63), 11 states have call successors, (14), 1 states have call predecessors, (14), 12 states have return successors, (23), 10 states have call predecessors, (23), 11 states have call successors, (23) Word has length 118 [2023-02-16 02:55:00,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 02:55:00,291 INFO L225 Difference]: With dead ends: 168 [2023-02-16 02:55:00,291 INFO L226 Difference]: Without dead ends: 100 [2023-02-16 02:55:00,293 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 301 GetRequests, 249 SyntacticMatches, 14 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 357 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=365, Invalid=1195, Unknown=0, NotChecked=0, Total=1560 [2023-02-16 02:55:00,293 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 40 mSDsluCounter, 144 mSDsCounter, 0 mSdLazyCounter, 288 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 166 SdHoareTripleChecker+Invalid, 349 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 288 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-16 02:55:00,294 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 166 Invalid, 349 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 288 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-16 02:55:00,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2023-02-16 02:55:00,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 100. [2023-02-16 02:55:00,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 67 states have (on average 1.1194029850746268) internal successors, (75), 68 states have internal predecessors, (75), 18 states have call successors, (18), 9 states have call predecessors, (18), 14 states have return successors, (67), 22 states have call predecessors, (67), 18 states have call successors, (67) [2023-02-16 02:55:00,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 160 transitions. [2023-02-16 02:55:00,307 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 160 transitions. Word has length 118 [2023-02-16 02:55:00,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 02:55:00,307 INFO L495 AbstractCegarLoop]: Abstraction has 100 states and 160 transitions. [2023-02-16 02:55:00,307 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.739130434782609) internal successors, (63), 21 states have internal predecessors, (63), 11 states have call successors, (14), 1 states have call predecessors, (14), 12 states have return successors, (23), 10 states have call predecessors, (23), 11 states have call successors, (23) [2023-02-16 02:55:00,307 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 160 transitions. [2023-02-16 02:55:00,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2023-02-16 02:55:00,309 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 02:55:00,309 INFO L195 NwaCegarLoop]: trace histogram [21, 21, 12, 9, 8, 8, 8, 8, 8, 8, 8, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 02:55:00,317 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-02-16 02:55:00,515 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 02:55:00,515 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 02:55:00,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 02:55:00,516 INFO L85 PathProgramCache]: Analyzing trace with hash 1294012555, now seen corresponding path program 4 times [2023-02-16 02:55:00,516 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 02:55:00,516 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [895779203] [2023-02-16 02:55:00,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 02:55:00,516 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 02:55:00,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:55:00,665 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-16 02:55:00,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:55:00,755 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-16 02:55:00,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:55:00,807 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-16 02:55:00,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:55:00,831 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-16 02:55:00,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:55:00,853 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-16 02:55:00,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:55:00,868 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-16 02:55:00,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:55:00,897 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-02-16 02:55:00,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:55:00,915 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2023-02-16 02:55:00,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:55:00,941 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-16 02:55:00,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:55:00,964 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-16 02:55:00,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:55:00,989 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-16 02:55:00,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:55:00,992 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-02-16 02:55:00,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:55:00,994 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2023-02-16 02:55:00,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:55:00,996 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2023-02-16 02:55:00,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:55:01,002 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-16 02:55:01,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:55:01,007 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-16 02:55:01,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:55:01,011 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-16 02:55:01,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:55:01,013 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-16 02:55:01,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:55:01,014 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-02-16 02:55:01,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:55:01,016 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2023-02-16 02:55:01,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:55:01,017 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2023-02-16 02:55:01,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:55:01,019 INFO L134 CoverageAnalysis]: Checked inductivity of 1030 backedges. 157 proven. 360 refuted. 0 times theorem prover too weak. 513 trivial. 0 not checked. [2023-02-16 02:55:01,019 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 02:55:01,019 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [895779203] [2023-02-16 02:55:01,019 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [895779203] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 02:55:01,020 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [548897258] [2023-02-16 02:55:01,020 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-16 02:55:01,020 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 02:55:01,020 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 02:55:01,021 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) [2023-02-16 02:55:01,028 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-02-16 02:55:01,129 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-16 02:55:01,129 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-16 02:55:01,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 446 conjuncts, 21 conjunts are in the unsatisfiable core [2023-02-16 02:55:01,138 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 02:55:01,199 INFO L134 CoverageAnalysis]: Checked inductivity of 1030 backedges. 595 proven. 114 refuted. 0 times theorem prover too weak. 321 trivial. 0 not checked. [2023-02-16 02:55:01,199 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 02:55:02,366 INFO L134 CoverageAnalysis]: Checked inductivity of 1030 backedges. 160 proven. 360 refuted. 0 times theorem prover too weak. 510 trivial. 0 not checked. [2023-02-16 02:55:02,367 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [548897258] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 02:55:02,367 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-16 02:55:02,367 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 14, 17] total 24 [2023-02-16 02:55:02,367 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [449097283] [2023-02-16 02:55:02,367 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-16 02:55:02,367 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-02-16 02:55:02,368 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 02:55:02,368 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-02-16 02:55:02,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=459, Unknown=0, NotChecked=0, Total=552 [2023-02-16 02:55:02,369 INFO L87 Difference]: Start difference. First operand 100 states and 160 transitions. Second operand has 24 states, 24 states have (on average 2.9583333333333335) internal successors, (71), 21 states have internal predecessors, (71), 12 states have call successors, (18), 2 states have call predecessors, (18), 12 states have return successors, (28), 11 states have call predecessors, (28), 12 states have call successors, (28) [2023-02-16 02:55:02,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 02:55:02,700 INFO L93 Difference]: Finished difference Result 191 states and 332 transitions. [2023-02-16 02:55:02,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-02-16 02:55:02,700 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.9583333333333335) internal successors, (71), 21 states have internal predecessors, (71), 12 states have call successors, (18), 2 states have call predecessors, (18), 12 states have return successors, (28), 11 states have call predecessors, (28), 12 states have call successors, (28) Word has length 144 [2023-02-16 02:55:02,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 02:55:02,702 INFO L225 Difference]: With dead ends: 191 [2023-02-16 02:55:02,702 INFO L226 Difference]: Without dead ends: 100 [2023-02-16 02:55:02,703 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 366 GetRequests, 309 SyntacticMatches, 14 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 458 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=461, Invalid=1519, Unknown=0, NotChecked=0, Total=1980 [2023-02-16 02:55:02,704 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 24 mSDsluCounter, 165 mSDsCounter, 0 mSdLazyCounter, 353 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 188 SdHoareTripleChecker+Invalid, 394 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 353 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-16 02:55:02,704 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 188 Invalid, 394 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 353 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-16 02:55:02,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2023-02-16 02:55:02,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 100. [2023-02-16 02:55:02,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 67 states have (on average 1.1194029850746268) internal successors, (75), 68 states have internal predecessors, (75), 18 states have call successors, (18), 9 states have call predecessors, (18), 14 states have return successors, (59), 22 states have call predecessors, (59), 18 states have call successors, (59) [2023-02-16 02:55:02,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 152 transitions. [2023-02-16 02:55:02,715 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 152 transitions. Word has length 144 [2023-02-16 02:55:02,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 02:55:02,715 INFO L495 AbstractCegarLoop]: Abstraction has 100 states and 152 transitions. [2023-02-16 02:55:02,715 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.9583333333333335) internal successors, (71), 21 states have internal predecessors, (71), 12 states have call successors, (18), 2 states have call predecessors, (18), 12 states have return successors, (28), 11 states have call predecessors, (28), 12 states have call successors, (28) [2023-02-16 02:55:02,715 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 152 transitions. [2023-02-16 02:55:02,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2023-02-16 02:55:02,716 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 02:55:02,717 INFO L195 NwaCegarLoop]: trace histogram [23, 23, 13, 10, 9, 9, 9, 9, 9, 9, 9, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 02:55:02,724 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-02-16 02:55:02,922 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 02:55:02,923 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 02:55:02,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 02:55:02,923 INFO L85 PathProgramCache]: Analyzing trace with hash -1701842998, now seen corresponding path program 5 times [2023-02-16 02:55:02,923 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 02:55:02,923 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [984585570] [2023-02-16 02:55:02,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 02:55:02,923 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 02:55:02,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:55:03,137 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-16 02:55:03,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:55:03,320 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-16 02:55:03,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:55:03,409 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-16 02:55:03,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:55:03,413 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-16 02:55:03,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:55:03,417 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-16 02:55:03,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:55:03,419 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-16 02:55:03,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:55:03,421 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-02-16 02:55:03,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:55:03,423 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2023-02-16 02:55:03,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:55:03,468 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-16 02:55:03,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:55:03,517 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-16 02:55:03,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:55:03,548 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-16 02:55:03,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:55:03,565 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-16 02:55:03,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:55:03,588 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-02-16 02:55:03,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:55:03,608 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2023-02-16 02:55:03,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:55:03,615 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2023-02-16 02:55:03,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:55:03,622 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2023-02-16 02:55:03,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:55:03,657 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-16 02:55:03,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:55:03,689 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-16 02:55:03,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:55:03,714 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-16 02:55:03,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:55:03,746 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-16 02:55:03,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:55:03,748 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-02-16 02:55:03,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:55:03,750 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2023-02-16 02:55:03,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:55:03,752 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2023-02-16 02:55:03,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:55:03,755 INFO L134 CoverageAnalysis]: Checked inductivity of 1246 backedges. 445 proven. 284 refuted. 0 times theorem prover too weak. 517 trivial. 0 not checked. [2023-02-16 02:55:03,755 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 02:55:03,756 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [984585570] [2023-02-16 02:55:03,756 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [984585570] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 02:55:03,756 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1593276517] [2023-02-16 02:55:03,756 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-16 02:55:03,756 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 02:55:03,756 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 02:55:03,757 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) [2023-02-16 02:55:03,788 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-02-16 02:55:03,885 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2023-02-16 02:55:03,885 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-16 02:55:03,887 INFO L263 TraceCheckSpWp]: Trace formula consists of 398 conjuncts, 35 conjunts are in the unsatisfiable core [2023-02-16 02:55:03,890 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 02:55:03,976 INFO L134 CoverageAnalysis]: Checked inductivity of 1246 backedges. 421 proven. 286 refuted. 0 times theorem prover too weak. 539 trivial. 0 not checked. [2023-02-16 02:55:03,976 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 02:55:06,765 INFO L134 CoverageAnalysis]: Checked inductivity of 1246 backedges. 467 proven. 286 refuted. 0 times theorem prover too weak. 493 trivial. 0 not checked. [2023-02-16 02:55:06,766 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1593276517] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 02:55:06,766 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-16 02:55:06,766 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20, 27] total 38 [2023-02-16 02:55:06,766 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [205362119] [2023-02-16 02:55:06,766 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-16 02:55:06,767 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2023-02-16 02:55:06,767 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 02:55:06,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2023-02-16 02:55:06,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=1220, Unknown=0, NotChecked=0, Total=1406 [2023-02-16 02:55:06,768 INFO L87 Difference]: Start difference. First operand 100 states and 152 transitions. Second operand has 38 states, 38 states have (on average 2.210526315789474) internal successors, (84), 32 states have internal predecessors, (84), 16 states have call successors, (19), 1 states have call predecessors, (19), 18 states have return successors, (36), 18 states have call predecessors, (36), 16 states have call successors, (36) [2023-02-16 02:55:07,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 02:55:07,402 INFO L93 Difference]: Finished difference Result 206 states and 359 transitions. [2023-02-16 02:55:07,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2023-02-16 02:55:07,403 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.210526315789474) internal successors, (84), 32 states have internal predecessors, (84), 16 states have call successors, (19), 1 states have call predecessors, (19), 18 states have return successors, (36), 18 states have call predecessors, (36), 16 states have call successors, (36) Word has length 157 [2023-02-16 02:55:07,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 02:55:07,404 INFO L225 Difference]: With dead ends: 206 [2023-02-16 02:55:07,405 INFO L226 Difference]: Without dead ends: 115 [2023-02-16 02:55:07,407 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 410 GetRequests, 328 SyntacticMatches, 19 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1069 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=799, Invalid=3361, Unknown=0, NotChecked=0, Total=4160 [2023-02-16 02:55:07,407 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 45 mSDsluCounter, 249 mSDsCounter, 0 mSdLazyCounter, 696 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 277 SdHoareTripleChecker+Invalid, 794 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 696 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-16 02:55:07,407 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 277 Invalid, 794 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 696 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-16 02:55:07,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2023-02-16 02:55:07,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 115. [2023-02-16 02:55:07,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 76 states have (on average 1.105263157894737) internal successors, (84), 77 states have internal predecessors, (84), 21 states have call successors, (21), 9 states have call predecessors, (21), 17 states have return successors, (80), 28 states have call predecessors, (80), 21 states have call successors, (80) [2023-02-16 02:55:07,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 185 transitions. [2023-02-16 02:55:07,419 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 185 transitions. Word has length 157 [2023-02-16 02:55:07,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 02:55:07,419 INFO L495 AbstractCegarLoop]: Abstraction has 115 states and 185 transitions. [2023-02-16 02:55:07,419 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 2.210526315789474) internal successors, (84), 32 states have internal predecessors, (84), 16 states have call successors, (19), 1 states have call predecessors, (19), 18 states have return successors, (36), 18 states have call predecessors, (36), 16 states have call successors, (36) [2023-02-16 02:55:07,419 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 185 transitions. [2023-02-16 02:55:07,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2023-02-16 02:55:07,421 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 02:55:07,421 INFO L195 NwaCegarLoop]: trace histogram [27, 27, 15, 12, 11, 11, 11, 11, 11, 11, 11, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 02:55:07,434 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-02-16 02:55:07,634 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 02:55:07,634 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 02:55:07,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 02:55:07,635 INFO L85 PathProgramCache]: Analyzing trace with hash 332854534, now seen corresponding path program 6 times [2023-02-16 02:55:07,635 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 02:55:07,635 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2132310825] [2023-02-16 02:55:07,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 02:55:07,635 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 02:55:07,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:55:07,907 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-16 02:55:07,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:55:08,152 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-16 02:55:08,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:55:08,160 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-16 02:55:08,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:55:08,164 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-16 02:55:08,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:55:08,167 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-16 02:55:08,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:55:08,169 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-16 02:55:08,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:55:08,171 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-02-16 02:55:08,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:55:08,178 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2023-02-16 02:55:08,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:55:08,185 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-16 02:55:08,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:55:08,192 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-16 02:55:08,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:55:08,196 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-16 02:55:08,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:55:08,199 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-16 02:55:08,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:55:08,200 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-02-16 02:55:08,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:55:08,202 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2023-02-16 02:55:08,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:55:08,204 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2023-02-16 02:55:08,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:55:08,206 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2023-02-16 02:55:08,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:55:08,301 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-16 02:55:08,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:55:08,406 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-16 02:55:08,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:55:08,475 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-16 02:55:08,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:55:08,536 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-16 02:55:08,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:55:08,593 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-16 02:55:08,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:55:08,637 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-16 02:55:08,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:55:08,685 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-02-16 02:55:08,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:55:08,743 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2023-02-16 02:55:08,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:55:08,753 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2023-02-16 02:55:08,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:55:08,764 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2023-02-16 02:55:08,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:55:08,774 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2023-02-16 02:55:08,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:55:08,787 INFO L134 CoverageAnalysis]: Checked inductivity of 1741 backedges. 600 proven. 156 refuted. 0 times theorem prover too weak. 985 trivial. 0 not checked. [2023-02-16 02:55:08,787 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 02:55:08,787 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2132310825] [2023-02-16 02:55:08,787 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2132310825] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 02:55:08,787 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [495282931] [2023-02-16 02:55:08,787 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-02-16 02:55:08,788 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 02:55:08,788 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 02:55:08,789 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) [2023-02-16 02:55:08,791 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-02-16 02:55:08,978 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 18 check-sat command(s) [2023-02-16 02:55:08,978 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-16 02:55:08,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 560 conjuncts, 79 conjunts are in the unsatisfiable core [2023-02-16 02:55:08,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 02:55:09,266 INFO L134 CoverageAnalysis]: Checked inductivity of 1741 backedges. 583 proven. 158 refuted. 0 times theorem prover too weak. 1000 trivial. 0 not checked. [2023-02-16 02:55:09,267 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 02:55:10,408 INFO L134 CoverageAnalysis]: Checked inductivity of 1741 backedges. 597 proven. 189 refuted. 0 times theorem prover too weak. 955 trivial. 0 not checked. [2023-02-16 02:55:10,408 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [495282931] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 02:55:10,408 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-16 02:55:10,409 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 23, 33] total 36 [2023-02-16 02:55:10,409 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [395111498] [2023-02-16 02:55:10,409 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-16 02:55:10,409 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2023-02-16 02:55:10,410 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 02:55:10,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2023-02-16 02:55:10,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=1171, Unknown=0, NotChecked=0, Total=1260 [2023-02-16 02:55:10,411 INFO L87 Difference]: Start difference. First operand 115 states and 185 transitions. Second operand has 36 states, 36 states have (on average 1.5555555555555556) internal successors, (56), 29 states have internal predecessors, (56), 6 states have call successors, (9), 1 states have call predecessors, (9), 14 states have return successors, (22), 13 states have call predecessors, (22), 6 states have call successors, (22) [2023-02-16 02:55:12,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 02:55:12,229 INFO L93 Difference]: Finished difference Result 237 states and 471 transitions. [2023-02-16 02:55:12,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2023-02-16 02:55:12,229 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.5555555555555556) internal successors, (56), 29 states have internal predecessors, (56), 6 states have call successors, (9), 1 states have call predecessors, (9), 14 states have return successors, (22), 13 states have call predecessors, (22), 6 states have call successors, (22) Word has length 183 [2023-02-16 02:55:12,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 02:55:12,233 INFO L225 Difference]: With dead ends: 237 [2023-02-16 02:55:12,233 INFO L226 Difference]: Without dead ends: 233 [2023-02-16 02:55:12,235 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 483 GetRequests, 399 SyntacticMatches, 14 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 752 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=582, Invalid=4530, Unknown=0, NotChecked=0, Total=5112 [2023-02-16 02:55:12,237 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 144 mSDsluCounter, 432 mSDsCounter, 0 mSdLazyCounter, 1856 mSolverCounterSat, 162 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 462 SdHoareTripleChecker+Invalid, 2018 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 162 IncrementalHoareTripleChecker+Valid, 1856 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-02-16 02:55:12,237 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [150 Valid, 462 Invalid, 2018 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [162 Valid, 1856 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-02-16 02:55:12,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2023-02-16 02:55:12,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 187. [2023-02-16 02:55:12,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187 states, 122 states have (on average 1.0819672131147542) internal successors, (132), 123 states have internal predecessors, (132), 31 states have call successors, (31), 11 states have call predecessors, (31), 33 states have return successors, (230), 52 states have call predecessors, (230), 31 states have call successors, (230) [2023-02-16 02:55:12,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 393 transitions. [2023-02-16 02:55:12,271 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 393 transitions. Word has length 183 [2023-02-16 02:55:12,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 02:55:12,272 INFO L495 AbstractCegarLoop]: Abstraction has 187 states and 393 transitions. [2023-02-16 02:55:12,272 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 1.5555555555555556) internal successors, (56), 29 states have internal predecessors, (56), 6 states have call successors, (9), 1 states have call predecessors, (9), 14 states have return successors, (22), 13 states have call predecessors, (22), 6 states have call successors, (22) [2023-02-16 02:55:12,272 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 393 transitions. [2023-02-16 02:55:12,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2023-02-16 02:55:12,275 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 02:55:12,275 INFO L195 NwaCegarLoop]: trace histogram [25, 25, 14, 11, 10, 10, 10, 10, 10, 10, 10, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 02:55:12,284 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-02-16 02:55:12,481 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 02:55:12,481 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 02:55:12,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 02:55:12,481 INFO L85 PathProgramCache]: Analyzing trace with hash -860565711, now seen corresponding path program 7 times [2023-02-16 02:55:12,481 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 02:55:12,482 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1606301714] [2023-02-16 02:55:12,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 02:55:12,482 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 02:55:12,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:55:12,694 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-16 02:55:12,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:55:12,835 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-16 02:55:12,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:55:12,900 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-16 02:55:12,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:55:12,905 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-16 02:55:12,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:55:12,908 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-16 02:55:12,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:55:12,915 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-16 02:55:12,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:55:12,916 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-02-16 02:55:12,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:55:12,917 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2023-02-16 02:55:12,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:55:12,957 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-16 02:55:12,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:55:12,988 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-16 02:55:12,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:55:13,013 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-16 02:55:13,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:55:13,029 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-16 02:55:13,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:55:13,051 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-02-16 02:55:13,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:55:13,069 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2023-02-16 02:55:13,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:55:13,084 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2023-02-16 02:55:13,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:55:13,090 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2023-02-16 02:55:13,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:55:13,135 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-16 02:55:13,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:55:13,190 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-16 02:55:13,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:55:13,224 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-16 02:55:13,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:55:13,246 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-16 02:55:13,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:55:13,270 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-16 02:55:13,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:55:13,272 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-02-16 02:55:13,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:55:13,273 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2023-02-16 02:55:13,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:55:13,274 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2023-02-16 02:55:13,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:55:13,276 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2023-02-16 02:55:13,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:55:13,278 INFO L134 CoverageAnalysis]: Checked inductivity of 1483 backedges. 502 proven. 372 refuted. 0 times theorem prover too weak. 609 trivial. 0 not checked. [2023-02-16 02:55:13,278 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 02:55:13,278 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1606301714] [2023-02-16 02:55:13,278 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1606301714] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 02:55:13,279 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [86936845] [2023-02-16 02:55:13,279 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-02-16 02:55:13,279 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 02:55:13,279 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 02:55:13,280 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) [2023-02-16 02:55:13,282 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-02-16 02:55:13,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:55:13,446 INFO L263 TraceCheckSpWp]: Trace formula consists of 522 conjuncts, 37 conjunts are in the unsatisfiable core [2023-02-16 02:55:13,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 02:55:13,532 INFO L134 CoverageAnalysis]: Checked inductivity of 1483 backedges. 477 proven. 372 refuted. 0 times theorem prover too weak. 634 trivial. 0 not checked. [2023-02-16 02:55:13,532 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 02:55:16,430 INFO L134 CoverageAnalysis]: Checked inductivity of 1483 backedges. 525 proven. 384 refuted. 0 times theorem prover too weak. 574 trivial. 0 not checked. [2023-02-16 02:55:16,430 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [86936845] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 02:55:16,430 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-16 02:55:16,430 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 21, 28] total 35 [2023-02-16 02:55:16,430 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [953433093] [2023-02-16 02:55:16,430 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-16 02:55:16,431 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-02-16 02:55:16,431 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 02:55:16,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-02-16 02:55:16,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=1017, Unknown=0, NotChecked=0, Total=1190 [2023-02-16 02:55:16,432 INFO L87 Difference]: Start difference. First operand 187 states and 393 transitions. Second operand has 35 states, 35 states have (on average 2.4285714285714284) internal successors, (85), 31 states have internal predecessors, (85), 17 states have call successors, (20), 1 states have call predecessors, (20), 18 states have return successors, (37), 16 states have call predecessors, (37), 17 states have call successors, (37) [2023-02-16 02:55:16,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 02:55:16,953 INFO L93 Difference]: Finished difference Result 346 states and 797 transitions. [2023-02-16 02:55:16,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2023-02-16 02:55:16,954 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.4285714285714284) internal successors, (85), 31 states have internal predecessors, (85), 17 states have call successors, (20), 1 states have call predecessors, (20), 18 states have return successors, (37), 16 states have call predecessors, (37), 17 states have call successors, (37) Word has length 170 [2023-02-16 02:55:16,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 02:55:16,956 INFO L225 Difference]: With dead ends: 346 [2023-02-16 02:55:16,956 INFO L226 Difference]: Without dead ends: 168 [2023-02-16 02:55:16,959 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 444 GetRequests, 355 SyntacticMatches, 26 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1200 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=865, Invalid=3295, Unknown=0, NotChecked=0, Total=4160 [2023-02-16 02:55:16,960 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 76 mSDsluCounter, 207 mSDsCounter, 0 mSdLazyCounter, 536 mSolverCounterSat, 153 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 235 SdHoareTripleChecker+Invalid, 689 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 153 IncrementalHoareTripleChecker+Valid, 536 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-16 02:55:16,960 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [82 Valid, 235 Invalid, 689 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [153 Valid, 536 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-16 02:55:16,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2023-02-16 02:55:16,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 168. [2023-02-16 02:55:16,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 110 states have (on average 1.0818181818181818) internal successors, (119), 111 states have internal predecessors, (119), 27 states have call successors, (27), 10 states have call predecessors, (27), 30 states have return successors, (162), 46 states have call predecessors, (162), 27 states have call successors, (162) [2023-02-16 02:55:16,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 308 transitions. [2023-02-16 02:55:16,972 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 308 transitions. Word has length 170 [2023-02-16 02:55:16,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 02:55:16,972 INFO L495 AbstractCegarLoop]: Abstraction has 168 states and 308 transitions. [2023-02-16 02:55:16,972 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.4285714285714284) internal successors, (85), 31 states have internal predecessors, (85), 17 states have call successors, (20), 1 states have call predecessors, (20), 18 states have return successors, (37), 16 states have call predecessors, (37), 17 states have call successors, (37) [2023-02-16 02:55:16,972 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 308 transitions. [2023-02-16 02:55:16,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 197 [2023-02-16 02:55:16,974 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 02:55:16,974 INFO L195 NwaCegarLoop]: trace histogram [29, 29, 16, 13, 12, 12, 12, 12, 12, 12, 12, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 02:55:16,989 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-02-16 02:55:17,179 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,SelfDestructingSolverStorable8 [2023-02-16 02:55:17,180 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 02:55:17,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 02:55:17,180 INFO L85 PathProgramCache]: Analyzing trace with hash 530318069, now seen corresponding path program 8 times [2023-02-16 02:55:17,180 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 02:55:17,180 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1674112086] [2023-02-16 02:55:17,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 02:55:17,180 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 02:55:17,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:55:17,408 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-16 02:55:17,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:55:17,580 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-16 02:55:17,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:55:17,646 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-16 02:55:17,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:55:17,649 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-16 02:55:17,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:55:17,652 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-16 02:55:17,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:55:17,653 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-16 02:55:17,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:55:17,655 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-02-16 02:55:17,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:55:17,655 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2023-02-16 02:55:17,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:55:17,689 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-16 02:55:17,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:55:17,719 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-16 02:55:17,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:55:17,743 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-16 02:55:17,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:55:17,758 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-16 02:55:17,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:55:17,778 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-02-16 02:55:17,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:55:17,795 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2023-02-16 02:55:17,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:55:17,804 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2023-02-16 02:55:17,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:55:17,812 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2023-02-16 02:55:17,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:55:17,876 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-16 02:55:17,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:55:17,935 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-16 02:55:17,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:55:17,978 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-16 02:55:17,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:55:18,016 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-16 02:55:18,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:55:18,046 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-16 02:55:18,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:55:18,070 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-16 02:55:18,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:55:18,097 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-16 02:55:18,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:55:18,099 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-02-16 02:55:18,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:55:18,101 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2023-02-16 02:55:18,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:55:18,103 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2023-02-16 02:55:18,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:55:18,104 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2023-02-16 02:55:18,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:55:18,106 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2023-02-16 02:55:18,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:55:18,108 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2023-02-16 02:55:18,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:55:18,110 INFO L134 CoverageAnalysis]: Checked inductivity of 2020 backedges. 664 proven. 533 refuted. 0 times theorem prover too weak. 823 trivial. 0 not checked. [2023-02-16 02:55:18,110 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 02:55:18,110 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1674112086] [2023-02-16 02:55:18,110 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1674112086] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 02:55:18,110 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1700793304] [2023-02-16 02:55:18,110 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-16 02:55:18,110 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 02:55:18,111 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 02:55:18,111 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) [2023-02-16 02:55:18,113 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-02-16 02:55:18,315 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-16 02:55:18,315 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-16 02:55:18,318 INFO L263 TraceCheckSpWp]: Trace formula consists of 598 conjuncts, 41 conjunts are in the unsatisfiable core [2023-02-16 02:55:18,320 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 02:55:18,427 INFO L134 CoverageAnalysis]: Checked inductivity of 2020 backedges. 647 proven. 519 refuted. 0 times theorem prover too weak. 854 trivial. 0 not checked. [2023-02-16 02:55:18,428 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 02:55:22,098 INFO L134 CoverageAnalysis]: Checked inductivity of 2020 backedges. 685 proven. 580 refuted. 0 times theorem prover too weak. 755 trivial. 0 not checked. [2023-02-16 02:55:22,098 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1700793304] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 02:55:22,098 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-16 02:55:22,098 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 23, 32] total 39 [2023-02-16 02:55:22,098 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1812769771] [2023-02-16 02:55:22,098 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-16 02:55:22,099 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2023-02-16 02:55:22,099 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 02:55:22,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2023-02-16 02:55:22,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=202, Invalid=1280, Unknown=0, NotChecked=0, Total=1482 [2023-02-16 02:55:22,100 INFO L87 Difference]: Start difference. First operand 168 states and 308 transitions. Second operand has 39 states, 39 states have (on average 2.4871794871794872) internal successors, (97), 35 states have internal predecessors, (97), 21 states have call successors, (24), 1 states have call predecessors, (24), 20 states have return successors, (45), 18 states have call predecessors, (45), 21 states have call successors, (45) [2023-02-16 02:55:22,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 02:55:22,754 INFO L93 Difference]: Finished difference Result 349 states and 744 transitions. [2023-02-16 02:55:22,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-02-16 02:55:22,755 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.4871794871794872) internal successors, (97), 35 states have internal predecessors, (97), 21 states have call successors, (24), 1 states have call predecessors, (24), 20 states have return successors, (45), 18 states have call predecessors, (45), 21 states have call successors, (45) Word has length 196 [2023-02-16 02:55:22,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 02:55:22,757 INFO L225 Difference]: With dead ends: 349 [2023-02-16 02:55:22,758 INFO L226 Difference]: Without dead ends: 190 [2023-02-16 02:55:22,760 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 501 GetRequests, 409 SyntacticMatches, 30 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1398 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=789, Invalid=3243, Unknown=0, NotChecked=0, Total=4032 [2023-02-16 02:55:22,761 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 138 mSDsluCounter, 314 mSDsCounter, 0 mSdLazyCounter, 918 mSolverCounterSat, 273 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 145 SdHoareTripleChecker+Valid, 348 SdHoareTripleChecker+Invalid, 1191 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 273 IncrementalHoareTripleChecker+Valid, 918 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-02-16 02:55:22,762 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [145 Valid, 348 Invalid, 1191 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [273 Valid, 918 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-02-16 02:55:22,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2023-02-16 02:55:22,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 173. [2023-02-16 02:55:22,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 113 states have (on average 1.0707964601769913) internal successors, (121), 114 states have internal predecessors, (121), 28 states have call successors, (28), 10 states have call predecessors, (28), 31 states have return successors, (166), 48 states have call predecessors, (166), 28 states have call successors, (166) [2023-02-16 02:55:22,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 315 transitions. [2023-02-16 02:55:22,778 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 315 transitions. Word has length 196 [2023-02-16 02:55:22,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 02:55:22,778 INFO L495 AbstractCegarLoop]: Abstraction has 173 states and 315 transitions. [2023-02-16 02:55:22,779 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 2.4871794871794872) internal successors, (97), 35 states have internal predecessors, (97), 21 states have call successors, (24), 1 states have call predecessors, (24), 20 states have return successors, (45), 18 states have call predecessors, (45), 21 states have call successors, (45) [2023-02-16 02:55:22,779 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 315 transitions. [2023-02-16 02:55:22,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 210 [2023-02-16 02:55:22,780 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 02:55:22,780 INFO L195 NwaCegarLoop]: trace histogram [31, 31, 17, 14, 13, 13, 13, 13, 13, 13, 13, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 02:55:22,798 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-02-16 02:55:22,986 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,SelfDestructingSolverStorable9 [2023-02-16 02:55:22,986 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 02:55:22,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 02:55:22,987 INFO L85 PathProgramCache]: Analyzing trace with hash 660925528, now seen corresponding path program 9 times [2023-02-16 02:55:22,987 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 02:55:22,987 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [219150775] [2023-02-16 02:55:22,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 02:55:22,987 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 02:55:23,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:55:23,199 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-16 02:55:23,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:55:23,316 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-16 02:55:23,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:55:23,381 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-16 02:55:23,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:55:23,401 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-16 02:55:23,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:55:23,419 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-16 02:55:23,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:55:23,431 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-16 02:55:23,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:55:23,448 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-02-16 02:55:23,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:55:23,463 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2023-02-16 02:55:23,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:55:23,500 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-16 02:55:23,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:55:23,531 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-16 02:55:23,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:55:23,571 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-16 02:55:23,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:55:23,593 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-16 02:55:23,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:55:23,614 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-16 02:55:23,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:55:23,616 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-02-16 02:55:23,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:55:23,618 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2023-02-16 02:55:23,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:55:23,619 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2023-02-16 02:55:23,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:55:23,620 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2023-02-16 02:55:23,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:55:23,623 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2023-02-16 02:55:23,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:55:23,630 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-16 02:55:23,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:55:23,636 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-16 02:55:23,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:55:23,640 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-16 02:55:23,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:55:23,644 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-16 02:55:23,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:55:23,647 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-16 02:55:23,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:55:23,649 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-16 02:55:23,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:55:23,651 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-16 02:55:23,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:55:23,652 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-02-16 02:55:23,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:55:23,652 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2023-02-16 02:55:23,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:55:23,653 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2023-02-16 02:55:23,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:55:23,654 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2023-02-16 02:55:23,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:55:23,655 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2023-02-16 02:55:23,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:55:23,656 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2023-02-16 02:55:23,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:55:23,658 INFO L134 CoverageAnalysis]: Checked inductivity of 2320 backedges. 267 proven. 793 refuted. 0 times theorem prover too weak. 1260 trivial. 0 not checked. [2023-02-16 02:55:23,658 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 02:55:23,658 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [219150775] [2023-02-16 02:55:23,658 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [219150775] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 02:55:23,658 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [655303387] [2023-02-16 02:55:23,658 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-16 02:55:23,658 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 02:55:23,658 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 02:55:23,659 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) [2023-02-16 02:55:23,664 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-02-16 02:55:23,927 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2023-02-16 02:55:23,927 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-16 02:55:23,929 INFO L263 TraceCheckSpWp]: Trace formula consists of 636 conjuncts, 25 conjunts are in the unsatisfiable core [2023-02-16 02:55:23,931 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 02:55:24,008 INFO L134 CoverageAnalysis]: Checked inductivity of 2320 backedges. 1340 proven. 196 refuted. 0 times theorem prover too weak. 784 trivial. 0 not checked. [2023-02-16 02:55:24,008 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 02:55:25,733 INFO L134 CoverageAnalysis]: Checked inductivity of 2320 backedges. 274 proven. 806 refuted. 0 times theorem prover too weak. 1240 trivial. 0 not checked. [2023-02-16 02:55:25,734 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [655303387] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 02:55:25,734 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-16 02:55:25,734 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 16, 21] total 28 [2023-02-16 02:55:25,734 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1404317516] [2023-02-16 02:55:25,734 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-16 02:55:25,735 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-02-16 02:55:25,736 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 02:55:25,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-02-16 02:55:25,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=638, Unknown=0, NotChecked=0, Total=756 [2023-02-16 02:55:25,738 INFO L87 Difference]: Start difference. First operand 173 states and 315 transitions. Second operand has 28 states, 28 states have (on average 2.9642857142857144) internal successors, (83), 25 states have internal predecessors, (83), 16 states have call successors, (22), 2 states have call predecessors, (22), 14 states have return successors, (36), 13 states have call predecessors, (36), 16 states have call successors, (36) [2023-02-16 02:55:26,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 02:55:26,082 INFO L93 Difference]: Finished difference Result 338 states and 689 transitions. [2023-02-16 02:55:26,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-02-16 02:55:26,083 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.9642857142857144) internal successors, (83), 25 states have internal predecessors, (83), 16 states have call successors, (22), 2 states have call predecessors, (22), 14 states have return successors, (36), 13 states have call predecessors, (36), 16 states have call successors, (36) Word has length 209 [2023-02-16 02:55:26,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 02:55:26,085 INFO L225 Difference]: With dead ends: 338 [2023-02-16 02:55:26,085 INFO L226 Difference]: Without dead ends: 174 [2023-02-16 02:55:26,087 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 514 GetRequests, 453 SyntacticMatches, 18 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 530 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=423, Invalid=1557, Unknown=0, NotChecked=0, Total=1980 [2023-02-16 02:55:26,088 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 52 mSDsluCounter, 230 mSDsCounter, 0 mSdLazyCounter, 476 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 260 SdHoareTripleChecker+Invalid, 550 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 476 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-16 02:55:26,088 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [57 Valid, 260 Invalid, 550 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 476 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-16 02:55:26,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2023-02-16 02:55:26,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 173. [2023-02-16 02:55:26,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 113 states have (on average 1.0707964601769913) internal successors, (121), 114 states have internal predecessors, (121), 28 states have call successors, (28), 10 states have call predecessors, (28), 31 states have return successors, (162), 48 states have call predecessors, (162), 28 states have call successors, (162) [2023-02-16 02:55:26,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 311 transitions. [2023-02-16 02:55:26,099 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 311 transitions. Word has length 209 [2023-02-16 02:55:26,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 02:55:26,099 INFO L495 AbstractCegarLoop]: Abstraction has 173 states and 311 transitions. [2023-02-16 02:55:26,099 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.9642857142857144) internal successors, (83), 25 states have internal predecessors, (83), 16 states have call successors, (22), 2 states have call predecessors, (22), 14 states have return successors, (36), 13 states have call predecessors, (36), 16 states have call successors, (36) [2023-02-16 02:55:26,099 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 311 transitions. [2023-02-16 02:55:26,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 282 [2023-02-16 02:55:26,101 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 02:55:26,101 INFO L195 NwaCegarLoop]: trace histogram [42, 42, 23, 19, 18, 18, 18, 18, 18, 18, 18, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 02:55:26,110 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-02-16 02:55:26,308 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,SelfDestructingSolverStorable10 [2023-02-16 02:55:26,308 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 02:55:26,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 02:55:26,309 INFO L85 PathProgramCache]: Analyzing trace with hash 471385981, now seen corresponding path program 10 times [2023-02-16 02:55:26,309 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 02:55:26,309 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1761935593] [2023-02-16 02:55:26,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 02:55:26,309 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 02:55:26,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:55:26,444 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-16 02:55:26,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:55:26,560 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-16 02:55:26,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:55:26,623 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-16 02:55:26,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:55:26,655 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-16 02:55:26,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:55:26,674 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-16 02:55:26,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:55:26,678 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-16 02:55:26,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:55:26,679 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-16 02:55:26,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:55:26,680 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-02-16 02:55:26,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:55:26,680 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2023-02-16 02:55:26,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:55:26,686 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-16 02:55:26,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:55:26,689 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-16 02:55:26,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:55:26,691 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-16 02:55:26,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:55:26,693 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-16 02:55:26,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:55:26,693 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-02-16 02:55:26,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:55:26,694 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2023-02-16 02:55:26,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:55:26,695 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2023-02-16 02:55:26,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:55:26,696 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2023-02-16 02:55:26,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:55:26,704 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-16 02:55:26,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:55:26,708 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-16 02:55:26,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:55:26,714 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-16 02:55:26,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:55:26,717 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-16 02:55:26,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:55:26,719 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-16 02:55:26,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:55:26,721 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-16 02:55:26,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:55:26,722 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-02-16 02:55:26,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:55:26,723 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2023-02-16 02:55:26,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:55:26,724 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2023-02-16 02:55:26,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:55:26,725 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2023-02-16 02:55:26,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:55:26,726 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2023-02-16 02:55:26,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:55:26,727 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 180 [2023-02-16 02:55:26,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:55:26,736 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-16 02:55:26,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:55:26,742 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-16 02:55:26,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:55:26,748 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-16 02:55:26,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:55:26,756 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-16 02:55:26,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:55:26,778 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-16 02:55:26,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:55:26,781 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-16 02:55:26,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:55:26,786 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-16 02:55:26,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:55:26,787 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-02-16 02:55:26,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:55:26,788 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2023-02-16 02:55:26,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:55:26,789 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2023-02-16 02:55:26,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:55:26,789 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2023-02-16 02:55:26,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:55:26,790 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2023-02-16 02:55:26,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:55:26,796 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2023-02-16 02:55:26,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:55:26,799 INFO L134 CoverageAnalysis]: Checked inductivity of 4329 backedges. 228 proven. 519 refuted. 0 times theorem prover too weak. 3582 trivial. 0 not checked. [2023-02-16 02:55:26,799 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 02:55:26,799 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1761935593] [2023-02-16 02:55:26,799 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1761935593] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 02:55:26,799 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [623173558] [2023-02-16 02:55:26,799 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-16 02:55:26,799 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 02:55:26,799 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 02:55:26,800 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) [2023-02-16 02:55:26,802 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-02-16 02:55:27,108 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-16 02:55:27,109 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-16 02:55:27,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 681 conjuncts, 10 conjunts are in the unsatisfiable core [2023-02-16 02:55:27,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 02:55:27,149 INFO L134 CoverageAnalysis]: Checked inductivity of 4329 backedges. 234 proven. 507 refuted. 0 times theorem prover too weak. 3588 trivial. 0 not checked. [2023-02-16 02:55:27,150 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 02:55:27,817 INFO L134 CoverageAnalysis]: Checked inductivity of 4329 backedges. 234 proven. 522 refuted. 0 times theorem prover too weak. 3573 trivial. 0 not checked. [2023-02-16 02:55:27,817 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [623173558] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 02:55:27,817 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-16 02:55:27,817 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 11] total 15 [2023-02-16 02:55:27,817 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [411987554] [2023-02-16 02:55:27,817 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-16 02:55:27,818 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-02-16 02:55:27,818 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 02:55:27,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-02-16 02:55:27,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2023-02-16 02:55:27,819 INFO L87 Difference]: Start difference. First operand 173 states and 311 transitions. Second operand has 15 states, 15 states have (on average 3.4) internal successors, (51), 15 states have internal predecessors, (51), 11 states have call successors, (14), 1 states have call predecessors, (14), 6 states have return successors, (18), 7 states have call predecessors, (18), 11 states have call successors, (18) [2023-02-16 02:55:27,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 02:55:27,920 INFO L93 Difference]: Finished difference Result 177 states and 314 transitions. [2023-02-16 02:55:27,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-02-16 02:55:27,920 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.4) internal successors, (51), 15 states have internal predecessors, (51), 11 states have call successors, (14), 1 states have call predecessors, (14), 6 states have return successors, (18), 7 states have call predecessors, (18), 11 states have call successors, (18) Word has length 281 [2023-02-16 02:55:27,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 02:55:27,923 INFO L225 Difference]: With dead ends: 177 [2023-02-16 02:55:27,923 INFO L226 Difference]: Without dead ends: 173 [2023-02-16 02:55:27,924 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 656 GetRequests, 631 SyntacticMatches, 7 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=121, Invalid=259, Unknown=0, NotChecked=0, Total=380 [2023-02-16 02:55:27,924 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 22 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 134 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 159 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-16 02:55:27,925 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 107 Invalid, 159 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 134 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-16 02:55:27,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2023-02-16 02:55:27,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 161. [2023-02-16 02:55:27,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 105 states have (on average 1.0761904761904761) internal successors, (113), 106 states have internal predecessors, (113), 28 states have call successors, (28), 10 states have call predecessors, (28), 27 states have return successors, (126), 44 states have call predecessors, (126), 28 states have call successors, (126) [2023-02-16 02:55:27,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 267 transitions. [2023-02-16 02:55:27,935 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 267 transitions. Word has length 281 [2023-02-16 02:55:27,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 02:55:27,935 INFO L495 AbstractCegarLoop]: Abstraction has 161 states and 267 transitions. [2023-02-16 02:55:27,935 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.4) internal successors, (51), 15 states have internal predecessors, (51), 11 states have call successors, (14), 1 states have call predecessors, (14), 6 states have return successors, (18), 7 states have call predecessors, (18), 11 states have call successors, (18) [2023-02-16 02:55:27,936 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 267 transitions. [2023-02-16 02:55:27,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 276 [2023-02-16 02:55:27,938 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 02:55:27,938 INFO L195 NwaCegarLoop]: trace histogram [41, 41, 23, 18, 17, 17, 17, 17, 17, 17, 17, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 02:55:27,947 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-02-16 02:55:28,141 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,SelfDestructingSolverStorable11 [2023-02-16 02:55:28,141 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 02:55:28,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 02:55:28,141 INFO L85 PathProgramCache]: Analyzing trace with hash 582117116, now seen corresponding path program 11 times [2023-02-16 02:55:28,142 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 02:55:28,142 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1076559395] [2023-02-16 02:55:28,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 02:55:28,142 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 02:55:28,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:55:28,317 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-16 02:55:28,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:55:28,454 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-16 02:55:28,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:55:28,617 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-16 02:55:28,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:55:28,695 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-16 02:55:28,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:55:28,752 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-16 02:55:28,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:55:28,755 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-16 02:55:28,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:55:28,758 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-16 02:55:28,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:55:28,759 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-16 02:55:28,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:55:28,760 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-02-16 02:55:28,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:55:28,761 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2023-02-16 02:55:28,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:55:28,796 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-16 02:55:28,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:55:28,849 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-16 02:55:28,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:55:28,885 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-16 02:55:28,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:55:28,907 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-16 02:55:28,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:55:28,936 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-02-16 02:55:28,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:55:28,963 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2023-02-16 02:55:28,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:55:28,970 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2023-02-16 02:55:28,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:55:28,981 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2023-02-16 02:55:28,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:55:29,021 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-16 02:55:29,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:55:29,061 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-16 02:55:29,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:55:29,094 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-16 02:55:29,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:55:29,121 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-16 02:55:29,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:55:29,153 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-16 02:55:29,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:55:29,155 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-02-16 02:55:29,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:55:29,156 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2023-02-16 02:55:29,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:55:29,157 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2023-02-16 02:55:29,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:55:29,159 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2023-02-16 02:55:29,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:55:29,160 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 174 [2023-02-16 02:55:29,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:55:29,169 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-16 02:55:29,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:55:29,175 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-16 02:55:29,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:55:29,179 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-16 02:55:29,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:55:29,183 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-16 02:55:29,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:55:29,186 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-16 02:55:29,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:55:29,187 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-16 02:55:29,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:55:29,189 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-16 02:55:29,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:55:29,189 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-02-16 02:55:29,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:55:29,190 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2023-02-16 02:55:29,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:55:29,191 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2023-02-16 02:55:29,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:55:29,192 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2023-02-16 02:55:29,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:55:29,193 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2023-02-16 02:55:29,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:55:29,194 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2023-02-16 02:55:29,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:55:29,196 INFO L134 CoverageAnalysis]: Checked inductivity of 4107 backedges. 599 proven. 1333 refuted. 0 times theorem prover too weak. 2175 trivial. 0 not checked. [2023-02-16 02:55:29,196 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 02:55:29,196 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1076559395] [2023-02-16 02:55:29,196 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1076559395] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 02:55:29,196 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [301841961] [2023-02-16 02:55:29,196 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-16 02:55:29,197 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 02:55:29,197 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 02:55:29,198 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) [2023-02-16 02:55:29,200 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-02-16 02:55:29,468 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2023-02-16 02:55:29,468 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-16 02:55:29,470 INFO L263 TraceCheckSpWp]: Trace formula consists of 476 conjuncts, 39 conjunts are in the unsatisfiable core [2023-02-16 02:55:29,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 02:55:29,571 INFO L134 CoverageAnalysis]: Checked inductivity of 4107 backedges. 2428 proven. 401 refuted. 0 times theorem prover too weak. 1278 trivial. 0 not checked. [2023-02-16 02:55:29,571 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 02:55:34,268 INFO L134 CoverageAnalysis]: Checked inductivity of 4107 backedges. 700 proven. 1204 refuted. 0 times theorem prover too weak. 2203 trivial. 0 not checked. [2023-02-16 02:55:34,268 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [301841961] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 02:55:34,268 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-16 02:55:34,268 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 22, 29] total 39 [2023-02-16 02:55:34,268 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [367405112] [2023-02-16 02:55:34,269 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-16 02:55:34,269 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2023-02-16 02:55:34,269 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 02:55:34,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2023-02-16 02:55:34,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=182, Invalid=1300, Unknown=0, NotChecked=0, Total=1482 [2023-02-16 02:55:34,270 INFO L87 Difference]: Start difference. First operand 161 states and 267 transitions. Second operand has 39 states, 39 states have (on average 2.58974358974359) internal successors, (101), 34 states have internal predecessors, (101), 20 states have call successors, (26), 2 states have call predecessors, (26), 19 states have return successors, (46), 19 states have call predecessors, (46), 20 states have call successors, (46) [2023-02-16 02:55:35,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 02:55:35,036 INFO L93 Difference]: Finished difference Result 308 states and 572 transitions. [2023-02-16 02:55:35,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2023-02-16 02:55:35,042 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.58974358974359) internal successors, (101), 34 states have internal predecessors, (101), 20 states have call successors, (26), 2 states have call predecessors, (26), 19 states have return successors, (46), 19 states have call predecessors, (46), 20 states have call successors, (46) Word has length 275 [2023-02-16 02:55:35,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 02:55:35,044 INFO L225 Difference]: With dead ends: 308 [2023-02-16 02:55:35,044 INFO L226 Difference]: Without dead ends: 156 [2023-02-16 02:55:35,047 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 695 GetRequests, 595 SyntacticMatches, 28 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1380 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1096, Invalid=4306, Unknown=0, NotChecked=0, Total=5402 [2023-02-16 02:55:35,047 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 103 mSDsluCounter, 244 mSDsCounter, 0 mSdLazyCounter, 887 mSolverCounterSat, 208 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 270 SdHoareTripleChecker+Invalid, 1095 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 208 IncrementalHoareTripleChecker+Valid, 887 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-16 02:55:35,047 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [103 Valid, 270 Invalid, 1095 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [208 Valid, 887 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-16 02:55:35,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2023-02-16 02:55:35,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 156. [2023-02-16 02:55:35,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 102 states have (on average 1.0784313725490196) internal successors, (110), 103 states have internal predecessors, (110), 27 states have call successors, (27), 10 states have call predecessors, (27), 26 states have return successors, (105), 42 states have call predecessors, (105), 27 states have call successors, (105) [2023-02-16 02:55:35,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 242 transitions. [2023-02-16 02:55:35,056 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 242 transitions. Word has length 275 [2023-02-16 02:55:35,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 02:55:35,056 INFO L495 AbstractCegarLoop]: Abstraction has 156 states and 242 transitions. [2023-02-16 02:55:35,056 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 2.58974358974359) internal successors, (101), 34 states have internal predecessors, (101), 20 states have call successors, (26), 2 states have call predecessors, (26), 19 states have return successors, (46), 19 states have call predecessors, (46), 20 states have call successors, (46) [2023-02-16 02:55:35,056 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 242 transitions. [2023-02-16 02:55:35,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 289 [2023-02-16 02:55:35,059 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 02:55:35,059 INFO L195 NwaCegarLoop]: trace histogram [43, 43, 24, 19, 18, 18, 18, 18, 18, 18, 18, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 02:55:35,077 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-02-16 02:55:35,265 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,SelfDestructingSolverStorable12 [2023-02-16 02:55:35,265 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 02:55:35,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 02:55:35,265 INFO L85 PathProgramCache]: Analyzing trace with hash 160073869, now seen corresponding path program 12 times [2023-02-16 02:55:35,265 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 02:55:35,265 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1360951503] [2023-02-16 02:55:35,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 02:55:35,266 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 02:55:35,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:55:35,439 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-16 02:55:35,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:55:35,592 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-16 02:55:35,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:55:35,715 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-16 02:55:35,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:55:35,769 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-16 02:55:35,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:55:35,804 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-16 02:55:35,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:55:35,819 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-16 02:55:35,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:55:35,834 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-16 02:55:35,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:55:35,841 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-16 02:55:35,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:55:35,854 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-02-16 02:55:35,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:55:35,856 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2023-02-16 02:55:35,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:55:35,862 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-16 02:55:35,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:55:35,864 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-16 02:55:35,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:55:35,866 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-16 02:55:35,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:55:35,867 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-16 02:55:35,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:55:35,868 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-02-16 02:55:35,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:55:35,869 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2023-02-16 02:55:35,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:55:35,869 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2023-02-16 02:55:35,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:55:35,870 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2023-02-16 02:55:35,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:55:35,907 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-16 02:55:35,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:55:35,935 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-16 02:55:35,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:55:35,957 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-16 02:55:35,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:55:35,973 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-16 02:55:35,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:55:35,984 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-16 02:55:35,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:55:35,991 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-16 02:55:35,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:55:35,996 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-02-16 02:55:35,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:55:35,998 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2023-02-16 02:55:35,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:55:35,999 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2023-02-16 02:55:35,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:55:36,000 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2023-02-16 02:55:36,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:55:36,001 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2023-02-16 02:55:36,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:55:36,002 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 187 [2023-02-16 02:55:36,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:55:36,011 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-16 02:55:36,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:55:36,016 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-16 02:55:36,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:55:36,021 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-16 02:55:36,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:55:36,024 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-16 02:55:36,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:55:36,026 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-16 02:55:36,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:55:36,028 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-16 02:55:36,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:55:36,029 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-16 02:55:36,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:55:36,030 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-02-16 02:55:36,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:55:36,031 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2023-02-16 02:55:36,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:55:36,033 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2023-02-16 02:55:36,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:55:36,034 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2023-02-16 02:55:36,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:55:36,035 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2023-02-16 02:55:36,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:55:36,036 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2023-02-16 02:55:36,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:55:36,037 INFO L134 CoverageAnalysis]: Checked inductivity of 4530 backedges. 563 proven. 1446 refuted. 0 times theorem prover too weak. 2521 trivial. 0 not checked. [2023-02-16 02:55:36,037 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 02:55:36,037 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1360951503] [2023-02-16 02:55:36,038 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1360951503] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 02:55:36,038 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1690126572] [2023-02-16 02:55:36,038 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-02-16 02:55:36,038 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 02:55:36,038 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 02:55:36,039 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) [2023-02-16 02:55:36,041 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-02-16 02:55:36,409 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 27 check-sat command(s) [2023-02-16 02:55:36,409 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-16 02:55:36,412 INFO L263 TraceCheckSpWp]: Trace formula consists of 821 conjuncts, 16 conjunts are in the unsatisfiable core [2023-02-16 02:55:36,415 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 02:55:36,482 INFO L134 CoverageAnalysis]: Checked inductivity of 4530 backedges. 342 proven. 850 refuted. 0 times theorem prover too weak. 3338 trivial. 0 not checked. [2023-02-16 02:55:36,482 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 02:55:37,820 INFO L134 CoverageAnalysis]: Checked inductivity of 4530 backedges. 352 proven. 878 refuted. 0 times theorem prover too weak. 3300 trivial. 0 not checked. [2023-02-16 02:55:37,821 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1690126572] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 02:55:37,821 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-16 02:55:37,821 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8, 11] total 17 [2023-02-16 02:55:37,821 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [94583282] [2023-02-16 02:55:37,821 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-16 02:55:37,822 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-02-16 02:55:37,822 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 02:55:37,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-02-16 02:55:37,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2023-02-16 02:55:37,823 INFO L87 Difference]: Start difference. First operand 156 states and 242 transitions. Second operand has 17 states, 17 states have (on average 3.7058823529411766) internal successors, (63), 17 states have internal predecessors, (63), 11 states have call successors, (20), 1 states have call predecessors, (20), 8 states have return successors, (31), 11 states have call predecessors, (31), 11 states have call successors, (31) [2023-02-16 02:55:37,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 02:55:37,989 INFO L93 Difference]: Finished difference Result 304 states and 532 transitions. [2023-02-16 02:55:37,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-02-16 02:55:37,990 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.7058823529411766) internal successors, (63), 17 states have internal predecessors, (63), 11 states have call successors, (20), 1 states have call predecessors, (20), 8 states have return successors, (31), 11 states have call predecessors, (31), 11 states have call successors, (31) Word has length 288 [2023-02-16 02:55:37,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 02:55:37,991 INFO L225 Difference]: With dead ends: 304 [2023-02-16 02:55:37,991 INFO L226 Difference]: Without dead ends: 0 [2023-02-16 02:55:37,993 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 685 GetRequests, 653 SyntacticMatches, 11 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=142, Invalid=364, Unknown=0, NotChecked=0, Total=506 [2023-02-16 02:55:37,993 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 45 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 212 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 143 SdHoareTripleChecker+Invalid, 295 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 212 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-16 02:55:37,994 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 143 Invalid, 295 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 212 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-16 02:55:37,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2023-02-16 02:55:37,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2023-02-16 02:55:37,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 02:55:37,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2023-02-16 02:55:37,995 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 288 [2023-02-16 02:55:37,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 02:55:37,995 INFO L495 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2023-02-16 02:55:37,995 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.7058823529411766) internal successors, (63), 17 states have internal predecessors, (63), 11 states have call successors, (20), 1 states have call predecessors, (20), 8 states have return successors, (31), 11 states have call predecessors, (31), 11 states have call successors, (31) [2023-02-16 02:55:37,995 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2023-02-16 02:55:37,995 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2023-02-16 02:55:37,997 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-02-16 02:55:38,012 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-02-16 02:55:38,205 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,SelfDestructingSolverStorable13 [2023-02-16 02:55:38,206 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2023-02-16 02:55:39,768 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2023-02-16 02:55:39,769 INFO L899 garLoopResultBuilder]: For program point L-1(line -1) no Hoare annotation was computed. [2023-02-16 02:55:39,769 INFO L899 garLoopResultBuilder]: For program point L29(lines 29 33) no Hoare annotation was computed. [2023-02-16 02:55:39,769 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2023-02-16 02:55:39,769 INFO L902 garLoopResultBuilder]: At program point L27(lines 27 47) the Hoare annotation is: true [2023-02-16 02:55:39,769 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 45) no Hoare annotation was computed. [2023-02-16 02:55:39,769 INFO L899 garLoopResultBuilder]: For program point L45(line 45) no Hoare annotation was computed. [2023-02-16 02:55:39,769 INFO L899 garLoopResultBuilder]: For program point L42(lines 42 46) no Hoare annotation was computed. [2023-02-16 02:55:39,769 INFO L899 garLoopResultBuilder]: For program point $Ultimate##0(line -1) no Hoare annotation was computed. [2023-02-16 02:55:39,770 INFO L902 garLoopResultBuilder]: At program point L41(line 41) the Hoare annotation is: true [2023-02-16 02:55:39,770 INFO L899 garLoopResultBuilder]: For program point L41-1(line 41) no Hoare annotation was computed. [2023-02-16 02:55:39,770 INFO L899 garLoopResultBuilder]: For program point L35(lines 35 40) no Hoare annotation was computed. [2023-02-16 02:55:39,770 INFO L899 garLoopResultBuilder]: For program point ackermannEXIT(lines 16 24) no Hoare annotation was computed. [2023-02-16 02:55:39,770 INFO L895 garLoopResultBuilder]: At program point L23(line 23) the Hoare annotation is: (and (or (not (<= 1 |ackermann_#in~n|)) (<= 1 |ackermann_#in~m|) (not (<= 0 |ackermann_#in~m|)) (not (<= |ackermann_#in~n| 1))) (= |ackermann_#in~m| ackermann_~m) (= ackermann_~n |ackermann_#in~n|)) [2023-02-16 02:55:39,770 INFO L899 garLoopResultBuilder]: For program point L23-1(line 23) no Hoare annotation was computed. [2023-02-16 02:55:39,770 INFO L895 garLoopResultBuilder]: At program point L21(line 21) the Hoare annotation is: (and (= |ackermann_#in~n| 0) (= |ackermann_#in~m| ackermann_~m) (= ackermann_~n |ackermann_#in~n|)) [2023-02-16 02:55:39,772 INFO L895 garLoopResultBuilder]: At program point L23-2(line 23) the Hoare annotation is: (let ((.cse1 (= |ackermann_#in~m| ackermann_~m)) (.cse3 (= ackermann_~n |ackermann_#in~n|))) (let ((.cse8 (<= |ackermann_#t~ret5| 3)) (.cse6 (<= 2 |ackermann_#in~n|)) (.cse4 (<= 1 |ackermann_#in~n|)) (.cse2 (<= 3 |ackermann_#in~n|)) (.cse11 (and (= |ackermann_#in~m| 0) .cse1 .cse3)) (.cse10 (<= 3 |ackermann_#t~ret5|)) (.cse0 (<= 5 |ackermann_#t~ret5|)) (.cse7 (<= |ackermann_#t~ret5| 5)) (.cse5 (= ackermann_~m |ackermann_#in~m|)) (.cse9 (< |ackermann_#in~n| 2)) (.cse12 (not (<= |ackermann_#in~m| 1)))) (and (or (not (<= 2 |ackermann_#in~m|)) (and .cse0 .cse1 .cse2 .cse3) (and .cse4 .cse5 .cse0 (<= 3 |ackermann_#in~m|) .cse3) (and .cse6 .cse0 .cse7 .cse1 (= |ackermann_#in~n| ackermann_~n)) (and .cse8 .cse4 .cse5 (<= |ackermann_#in~m| 2) .cse9 .cse10 .cse3)) (or .cse11 (and .cse8 .cse6) (and .cse4 (<= |ackermann_#t~ret5| 2)) .cse2 .cse12) (let ((.cse13 (<= 1 |ackermann_#in~m|))) (or .cse11 (and .cse13 .cse1 (<= |ackermann_#in~n| 2) .cse10 .cse3) (and .cse13 (<= 6 |ackermann_#in~n|) .cse0 .cse1 .cse3) (and .cse13 .cse0 .cse7 (<= 4 |ackermann_#in~n|) .cse1 (<= |ackermann_#in~n| 4) .cse3) (and .cse13 (<= |ackermann_#in~n| 3) .cse1 (<= |ackermann_#t~ret5| 4) .cse3 (<= 4 |ackermann_#t~ret5|)) (and .cse13 (<= |ackermann_#t~ret5| 6) (<= 5 |ackermann_#in~n|) .cse5 (<= 6 |ackermann_#t~ret5|) .cse3) (and .cse13 .cse9 .cse1 (<= 2 |ackermann_#t~ret5|) .cse3) .cse12))))) [2023-02-16 02:55:39,772 INFO L899 garLoopResultBuilder]: For program point L20(lines 20 22) no Hoare annotation was computed. [2023-02-16 02:55:39,772 INFO L899 garLoopResultBuilder]: For program point L21-1(line 21) no Hoare annotation was computed. [2023-02-16 02:55:39,772 INFO L899 garLoopResultBuilder]: For program point L23-3(line 23) no Hoare annotation was computed. [2023-02-16 02:55:39,772 INFO L899 garLoopResultBuilder]: For program point L17(lines 17 19) no Hoare annotation was computed. [2023-02-16 02:55:39,772 INFO L902 garLoopResultBuilder]: At program point $Ultimate##0(lines 16 24) the Hoare annotation is: true [2023-02-16 02:55:39,772 INFO L899 garLoopResultBuilder]: For program point ackermannFINAL(lines 16 24) no Hoare annotation was computed. [2023-02-16 02:55:39,791 INFO L445 BasicCegarLoop]: Path program histogram: [12, 1, 1] [2023-02-16 02:55:39,793 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-02-16 02:55:39,802 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 16.02 02:55:39 BoogieIcfgContainer [2023-02-16 02:55:39,803 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-02-16 02:55:39,804 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2023-02-16 02:55:39,804 INFO L271 PluginConnector]: Initializing Witness Printer... [2023-02-16 02:55:39,804 INFO L275 PluginConnector]: Witness Printer initialized [2023-02-16 02:55:39,810 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.02 02:54:52" (3/4) ... [2023-02-16 02:55:39,815 INFO L137 WitnessPrinter]: Generating witness for correct program [2023-02-16 02:55:39,831 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure ackermann [2023-02-16 02:55:39,835 INFO L961 BoogieBacktranslator]: Reduced CFG by removing 11 nodes and edges [2023-02-16 02:55:39,835 INFO L961 BoogieBacktranslator]: Reduced CFG by removing 6 nodes and edges [2023-02-16 02:55:39,835 INFO L961 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2023-02-16 02:55:39,835 INFO L961 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2023-02-16 02:55:39,862 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2023-02-16 02:55:39,863 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2023-02-16 02:55:39,863 INFO L158 Benchmark]: Toolchain (without parser) took 47487.30ms. Allocated memory was 136.3MB in the beginning and 539.0MB in the end (delta: 402.7MB). Free memory was 89.9MB in the beginning and 437.6MB in the end (delta: -347.7MB). Peak memory consumption was 57.1MB. Max. memory is 16.1GB. [2023-02-16 02:55:39,863 INFO L158 Benchmark]: CDTParser took 0.20ms. Allocated memory is still 96.5MB. Free memory was 43.7MB in the beginning and 43.6MB in the end (delta: 134.3kB). There was no memory consumed. Max. memory is 16.1GB. [2023-02-16 02:55:39,863 INFO L158 Benchmark]: CACSL2BoogieTranslator took 195.21ms. Allocated memory is still 136.3MB. Free memory was 89.5MB in the beginning and 79.5MB in the end (delta: 10.0MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2023-02-16 02:55:39,863 INFO L158 Benchmark]: Boogie Procedure Inliner took 22.44ms. Allocated memory is still 136.3MB. Free memory was 79.5MB in the beginning and 78.2MB in the end (delta: 1.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-02-16 02:55:39,864 INFO L158 Benchmark]: Boogie Preprocessor took 30.74ms. Allocated memory is still 136.3MB. Free memory was 78.2MB in the beginning and 77.3MB in the end (delta: 855.3kB). There was no memory consumed. Max. memory is 16.1GB. [2023-02-16 02:55:39,864 INFO L158 Benchmark]: RCFGBuilder took 253.43ms. Allocated memory is still 136.3MB. Free memory was 77.3MB in the beginning and 66.9MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-02-16 02:55:39,864 INFO L158 Benchmark]: TraceAbstraction took 46920.03ms. Allocated memory was 136.3MB in the beginning and 539.0MB in the end (delta: 402.7MB). Free memory was 66.4MB in the beginning and 439.7MB in the end (delta: -373.3MB). Peak memory consumption was 289.8MB. Max. memory is 16.1GB. [2023-02-16 02:55:39,864 INFO L158 Benchmark]: Witness Printer took 59.02ms. Allocated memory is still 539.0MB. Free memory was 439.7MB in the beginning and 437.6MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-02-16 02:55:39,865 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20ms. Allocated memory is still 96.5MB. Free memory was 43.7MB in the beginning and 43.6MB in the end (delta: 134.3kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 195.21ms. Allocated memory is still 136.3MB. Free memory was 89.5MB in the beginning and 79.5MB in the end (delta: 10.0MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 22.44ms. Allocated memory is still 136.3MB. Free memory was 79.5MB in the beginning and 78.2MB in the end (delta: 1.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 30.74ms. Allocated memory is still 136.3MB. Free memory was 78.2MB in the beginning and 77.3MB in the end (delta: 855.3kB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 253.43ms. Allocated memory is still 136.3MB. Free memory was 77.3MB in the beginning and 66.9MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * TraceAbstraction took 46920.03ms. Allocated memory was 136.3MB in the beginning and 539.0MB in the end (delta: 402.7MB). Free memory was 66.4MB in the beginning and 439.7MB in the end (delta: -373.3MB). Peak memory consumption was 289.8MB. Max. memory is 16.1GB. * Witness Printer took 59.02ms. Allocated memory is still 539.0MB. Free memory was 439.7MB in the beginning and 437.6MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 45]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 23 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 46.8s, OverallIterations: 14, TraceHistogramMax: 43, PathProgramHistogramMax: 12, EmptinessCheckTime: 0.0s, AutomataDifference: 6.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 1.6s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 904 SdHoareTripleChecker+Valid, 3.2s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 840 mSDsluCounter, 2878 SdHoareTripleChecker+Invalid, 2.5s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 2500 mSDsCounter, 1401 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 7132 IncrementalHoareTripleChecker+Invalid, 8533 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 1401 mSolverCounterUnsat, 378 mSDtfsCounter, 7132 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 5535 GetRequests, 4768 SyntacticMatches, 190 SemanticMatches, 577 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7908 ImplicationChecksByTransitivity, 6.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=187occurred in iteration=8, InterpolantAutomatonStates: 330, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 14 MinimizatonAttempts, 77 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 6 LocationsWithAnnotation, 938 PreInvPairs, 2577 NumberOfFragments, 264 HoareAnnotationTreeSize, 938 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.1s HoareSimplificationTime, 6 FomulaSimplificationsInter, 17171 FormulaSimplificationTreeSizeReductionInter, 1.4s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 0.8s SatisfiabilityAnalysisTime, 32.7s InterpolantComputationTime, 4420 NumberOfCodeBlocks, 4197 NumberOfCodeBlocksAsserted, 128 NumberOfCheckSat, 6584 ConstructedInterpolants, 0 QuantifiedInterpolants, 12631 SizeOfPredicates, 117 NumberOfNonLiveVariables, 6042 ConjunctsInSsa, 355 ConjunctsInUnsatCore, 40 InterpolantComputations, 1 PerfectInterpolantSequences, 57260/72621 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 27]: Loop Invariant Derived loop invariant: 1 RESULT: Ultimate proved your program to be correct! [2023-02-16 02:55:39,889 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE