./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/recursive/EvenOdd01-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e8d55036 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/recursive/EvenOdd01-1.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 90982c548a5fc18702a6b533ab589c969b87a7efde724f265c9d2a7d593347dc --- Real Ultimate output --- This is Ultimate 0.2.2-?-e8d5503-m [2023-02-15 21:35:27,821 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-02-15 21:35:27,823 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-02-15 21:35:27,853 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-02-15 21:35:27,853 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-02-15 21:35:27,855 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-02-15 21:35:27,857 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-02-15 21:35:27,859 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-02-15 21:35:27,861 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-02-15 21:35:27,864 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-02-15 21:35:27,865 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-02-15 21:35:27,866 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-02-15 21:35:27,866 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-02-15 21:35:27,868 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-02-15 21:35:27,869 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-02-15 21:35:27,870 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-02-15 21:35:27,871 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-02-15 21:35:27,872 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-02-15 21:35:27,873 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-02-15 21:35:27,876 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-02-15 21:35:27,877 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-02-15 21:35:27,877 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-02-15 21:35:27,878 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-02-15 21:35:27,879 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-02-15 21:35:27,885 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-02-15 21:35:27,885 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-02-15 21:35:27,885 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-02-15 21:35:27,886 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-02-15 21:35:27,887 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-02-15 21:35:27,887 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-02-15 21:35:27,887 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-02-15 21:35:27,888 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-02-15 21:35:27,889 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-02-15 21:35:27,890 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-02-15 21:35:27,890 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-02-15 21:35:27,890 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-02-15 21:35:27,891 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-02-15 21:35:27,891 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-02-15 21:35:27,891 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-02-15 21:35:27,892 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-02-15 21:35:27,893 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-02-15 21:35:27,894 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-02-15 21:35:27,925 INFO L113 SettingsManager]: Loading preferences was successful [2023-02-15 21:35:27,929 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-02-15 21:35:27,930 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-02-15 21:35:27,930 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-02-15 21:35:27,930 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-02-15 21:35:27,931 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-02-15 21:35:27,931 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-02-15 21:35:27,931 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-02-15 21:35:27,931 INFO L138 SettingsManager]: * Use SBE=true [2023-02-15 21:35:27,932 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-02-15 21:35:27,932 INFO L138 SettingsManager]: * sizeof long=4 [2023-02-15 21:35:27,932 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-02-15 21:35:27,932 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-02-15 21:35:27,933 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-02-15 21:35:27,933 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-02-15 21:35:27,933 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-02-15 21:35:27,933 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-02-15 21:35:27,933 INFO L138 SettingsManager]: * sizeof long double=12 [2023-02-15 21:35:27,933 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-02-15 21:35:27,933 INFO L138 SettingsManager]: * Use constant arrays=true [2023-02-15 21:35:27,934 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-02-15 21:35:27,934 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-02-15 21:35:27,934 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-02-15 21:35:27,934 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-02-15 21:35:27,934 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-15 21:35:27,934 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-02-15 21:35:27,934 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-02-15 21:35:27,935 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-02-15 21:35:27,935 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-02-15 21:35:27,935 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-02-15 21:35:27,935 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-02-15 21:35:27,935 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-02-15 21:35:27,936 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-02-15 21:35:27,936 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-02-15 21:35:27,936 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-02-15 21:35:27,936 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 90982c548a5fc18702a6b533ab589c969b87a7efde724f265c9d2a7d593347dc [2023-02-15 21:35:28,131 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-02-15 21:35:28,153 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-02-15 21:35:28,155 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-02-15 21:35:28,156 INFO L271 PluginConnector]: Initializing CDTParser... [2023-02-15 21:35:28,156 INFO L275 PluginConnector]: CDTParser initialized [2023-02-15 21:35:28,157 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/recursive/EvenOdd01-1.c [2023-02-15 21:35:29,135 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-02-15 21:35:29,252 INFO L351 CDTParser]: Found 1 translation units. [2023-02-15 21:35:29,253 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursive/EvenOdd01-1.c [2023-02-15 21:35:29,257 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/34029c850/ea76e6610c734da290301069cd9149a2/FLAGce5fcfc9e [2023-02-15 21:35:29,270 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/34029c850/ea76e6610c734da290301069cd9149a2 [2023-02-15 21:35:29,272 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-02-15 21:35:29,273 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-02-15 21:35:29,275 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-02-15 21:35:29,275 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-02-15 21:35:29,277 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-02-15 21:35:29,278 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.02 09:35:29" (1/1) ... [2023-02-15 21:35:29,278 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@45e1f4ff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 09:35:29, skipping insertion in model container [2023-02-15 21:35:29,278 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.02 09:35:29" (1/1) ... [2023-02-15 21:35:29,283 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-02-15 21:35:29,293 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-02-15 21:35:29,397 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursive/EvenOdd01-1.c[975,988] [2023-02-15 21:35:29,400 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-15 21:35:29,406 INFO L203 MainTranslator]: Completed pre-run [2023-02-15 21:35:29,416 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursive/EvenOdd01-1.c[975,988] [2023-02-15 21:35:29,416 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-15 21:35:29,425 INFO L208 MainTranslator]: Completed translation [2023-02-15 21:35:29,425 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 09:35:29 WrapperNode [2023-02-15 21:35:29,425 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-02-15 21:35:29,426 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-02-15 21:35:29,426 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-02-15 21:35:29,426 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-02-15 21:35:29,431 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 09:35:29" (1/1) ... [2023-02-15 21:35:29,435 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 09:35:29" (1/1) ... [2023-02-15 21:35:29,444 INFO L138 Inliner]: procedures = 14, calls = 10, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 27 [2023-02-15 21:35:29,444 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-02-15 21:35:29,445 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-02-15 21:35:29,445 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-02-15 21:35:29,445 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-02-15 21:35:29,450 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 09:35:29" (1/1) ... [2023-02-15 21:35:29,450 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 09:35:29" (1/1) ... [2023-02-15 21:35:29,451 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 09:35:29" (1/1) ... [2023-02-15 21:35:29,451 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 09:35:29" (1/1) ... [2023-02-15 21:35:29,453 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 09:35:29" (1/1) ... [2023-02-15 21:35:29,454 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 09:35:29" (1/1) ... [2023-02-15 21:35:29,455 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 09:35:29" (1/1) ... [2023-02-15 21:35:29,455 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 09:35:29" (1/1) ... [2023-02-15 21:35:29,456 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-02-15 21:35:29,457 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-02-15 21:35:29,457 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-02-15 21:35:29,457 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-02-15 21:35:29,457 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 09:35:29" (1/1) ... [2023-02-15 21:35:29,466 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-15 21:35:29,473 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 21:35:29,482 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) [2023-02-15 21:35:29,487 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 [2023-02-15 21:35:29,505 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-02-15 21:35:29,505 INFO L130 BoogieDeclarations]: Found specification of procedure isEven [2023-02-15 21:35:29,506 INFO L138 BoogieDeclarations]: Found implementation of procedure isEven [2023-02-15 21:35:29,506 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-02-15 21:35:29,506 INFO L130 BoogieDeclarations]: Found specification of procedure isOdd [2023-02-15 21:35:29,506 INFO L138 BoogieDeclarations]: Found implementation of procedure isOdd [2023-02-15 21:35:29,506 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-02-15 21:35:29,506 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-02-15 21:35:29,544 INFO L235 CfgBuilder]: Building ICFG [2023-02-15 21:35:29,546 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2023-02-15 21:35:29,642 INFO L276 CfgBuilder]: Performing block encoding [2023-02-15 21:35:29,646 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-02-15 21:35:29,646 INFO L300 CfgBuilder]: Removed 0 assume(true) statements. [2023-02-15 21:35:29,647 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.02 09:35:29 BoogieIcfgContainer [2023-02-15 21:35:29,647 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-02-15 21:35:29,649 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-02-15 21:35:29,649 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-02-15 21:35:29,651 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-02-15 21:35:29,651 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.02 09:35:29" (1/3) ... [2023-02-15 21:35:29,651 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@70afb7e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.02 09:35:29, skipping insertion in model container [2023-02-15 21:35:29,652 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 09:35:29" (2/3) ... [2023-02-15 21:35:29,652 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@70afb7e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.02 09:35:29, skipping insertion in model container [2023-02-15 21:35:29,652 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.02 09:35:29" (3/3) ... [2023-02-15 21:35:29,653 INFO L112 eAbstractionObserver]: Analyzing ICFG EvenOdd01-1.c [2023-02-15 21:35:29,664 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-02-15 21:35:29,664 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-02-15 21:35:29,727 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-02-15 21:35:29,734 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;@4b32eb5c, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-02-15 21:35:29,735 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-02-15 21:35:29,739 INFO L276 IsEmpty]: Start isEmpty. Operand has 25 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 19 states have internal predecessors, (25), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-15 21:35:29,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-02-15 21:35:29,744 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 21:35:29,745 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 21:35:29,746 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 21:35:29,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 21:35:29,752 INFO L85 PathProgramCache]: Analyzing trace with hash 951696528, now seen corresponding path program 1 times [2023-02-15 21:35:29,759 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 21:35:29,759 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [800754594] [2023-02-15 21:35:29,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 21:35:29,760 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 21:35:29,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:35:30,231 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:35:30,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:35:30,274 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 21:35:30,275 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 21:35:30,275 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [800754594] [2023-02-15 21:35:30,276 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [800754594] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 21:35:30,276 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 21:35:30,276 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-02-15 21:35:30,277 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1441855658] [2023-02-15 21:35:30,278 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 21:35:30,280 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-02-15 21:35:30,280 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 21:35:30,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-15 21:35:30,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-02-15 21:35:30,300 INFO L87 Difference]: Start difference. First operand has 25 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 19 states have internal predecessors, (25), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 6 states, 6 states have (on average 1.5) internal successors, (9), 5 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-15 21:35:30,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 21:35:30,392 INFO L93 Difference]: Finished difference Result 37 states and 43 transitions. [2023-02-15 21:35:30,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-15 21:35:30,394 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.5) internal successors, (9), 5 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2023-02-15 21:35:30,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 21:35:30,399 INFO L225 Difference]: With dead ends: 37 [2023-02-15 21:35:30,399 INFO L226 Difference]: Without dead ends: 24 [2023-02-15 21:35:30,401 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-02-15 21:35:30,404 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 10 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 21:35:30,405 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 97 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 21:35:30,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2023-02-15 21:35:30,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2023-02-15 21:35:30,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 18 states have internal predecessors, (21), 3 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2023-02-15 21:35:30,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2023-02-15 21:35:30,430 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 11 [2023-02-15 21:35:30,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 21:35:30,430 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2023-02-15 21:35:30,431 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.5) internal successors, (9), 5 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-15 21:35:30,431 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2023-02-15 21:35:30,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-02-15 21:35:30,432 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 21:35:30,432 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 21:35:30,432 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-02-15 21:35:30,432 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 21:35:30,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 21:35:30,433 INFO L85 PathProgramCache]: Analyzing trace with hash 186374926, now seen corresponding path program 1 times [2023-02-15 21:35:30,433 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 21:35:30,433 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2124548083] [2023-02-15 21:35:30,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 21:35:30,434 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 21:35:30,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:35:30,651 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:35:30,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:35:30,720 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 21:35:30,721 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 21:35:30,721 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2124548083] [2023-02-15 21:35:30,721 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2124548083] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 21:35:30,722 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 21:35:30,722 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-02-15 21:35:30,722 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1507022899] [2023-02-15 21:35:30,722 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 21:35:30,724 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-02-15 21:35:30,724 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 21:35:30,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-02-15 21:35:30,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-02-15 21:35:30,726 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand has 7 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 6 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-15 21:35:30,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 21:35:30,784 INFO L93 Difference]: Finished difference Result 30 states and 34 transitions. [2023-02-15 21:35:30,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-02-15 21:35:30,785 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 6 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2023-02-15 21:35:30,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 21:35:30,786 INFO L225 Difference]: With dead ends: 30 [2023-02-15 21:35:30,786 INFO L226 Difference]: Without dead ends: 26 [2023-02-15 21:35:30,789 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2023-02-15 21:35:30,791 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 9 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 21:35:30,791 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 77 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 21:35:30,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2023-02-15 21:35:30,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 24. [2023-02-15 21:35:30,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 18 states have internal predecessors, (21), 3 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2023-02-15 21:35:30,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2023-02-15 21:35:30,805 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 12 [2023-02-15 21:35:30,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 21:35:30,805 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2023-02-15 21:35:30,805 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 6 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-15 21:35:30,806 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2023-02-15 21:35:30,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-02-15 21:35:30,806 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 21:35:30,810 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 21:35:30,810 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-02-15 21:35:30,810 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 21:35:30,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 21:35:30,811 INFO L85 PathProgramCache]: Analyzing trace with hash -1539294770, now seen corresponding path program 1 times [2023-02-15 21:35:30,811 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 21:35:30,811 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2119743645] [2023-02-15 21:35:30,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 21:35:30,811 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 21:35:30,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:35:30,835 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:35:30,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:35:30,857 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:35:30,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:35:30,891 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 21:35:30,892 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 21:35:30,892 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2119743645] [2023-02-15 21:35:30,892 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2119743645] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 21:35:30,892 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 21:35:30,893 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-15 21:35:30,893 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1520977166] [2023-02-15 21:35:30,893 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 21:35:30,893 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-15 21:35:30,893 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 21:35:30,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-15 21:35:30,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-02-15 21:35:30,894 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand has 5 states, 4 states have (on average 3.5) internal successors, (14), 5 states have internal predecessors, (14), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-15 21:35:30,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 21:35:30,922 INFO L93 Difference]: Finished difference Result 38 states and 42 transitions. [2023-02-15 21:35:30,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-02-15 21:35:30,924 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.5) internal successors, (14), 5 states have internal predecessors, (14), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 18 [2023-02-15 21:35:30,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 21:35:30,926 INFO L225 Difference]: With dead ends: 38 [2023-02-15 21:35:30,926 INFO L226 Difference]: Without dead ends: 26 [2023-02-15 21:35:30,928 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-02-15 21:35:30,931 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 7 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 21:35:30,932 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 66 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 21:35:30,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2023-02-15 21:35:30,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 24. [2023-02-15 21:35:30,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 18 states have internal predecessors, (20), 3 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2023-02-15 21:35:30,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 27 transitions. [2023-02-15 21:35:30,939 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 27 transitions. Word has length 18 [2023-02-15 21:35:30,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 21:35:30,939 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 27 transitions. [2023-02-15 21:35:30,939 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.5) internal successors, (14), 5 states have internal predecessors, (14), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-15 21:35:30,939 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 27 transitions. [2023-02-15 21:35:30,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-02-15 21:35:30,940 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 21:35:30,940 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 21:35:30,940 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-02-15 21:35:30,940 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 21:35:30,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 21:35:30,943 INFO L85 PathProgramCache]: Analyzing trace with hash -542404186, now seen corresponding path program 1 times [2023-02-15 21:35:30,944 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 21:35:30,944 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [662051165] [2023-02-15 21:35:30,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 21:35:30,944 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 21:35:30,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:35:31,084 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:35:31,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:35:31,166 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:35:31,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:35:31,207 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 21:35:31,208 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 21:35:31,208 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [662051165] [2023-02-15 21:35:31,208 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [662051165] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 21:35:31,208 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 21:35:31,208 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-02-15 21:35:31,208 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1517541888] [2023-02-15 21:35:31,209 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 21:35:31,209 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-02-15 21:35:31,209 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 21:35:31,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-02-15 21:35:31,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2023-02-15 21:35:31,211 INFO L87 Difference]: Start difference. First operand 24 states and 27 transitions. Second operand has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 7 states have internal predecessors, (15), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-15 21:35:31,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 21:35:31,299 INFO L93 Difference]: Finished difference Result 33 states and 36 transitions. [2023-02-15 21:35:31,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-02-15 21:35:31,300 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 7 states have internal predecessors, (15), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 19 [2023-02-15 21:35:31,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 21:35:31,302 INFO L225 Difference]: With dead ends: 33 [2023-02-15 21:35:31,302 INFO L226 Difference]: Without dead ends: 29 [2023-02-15 21:35:31,302 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2023-02-15 21:35:31,307 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 8 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 21:35:31,308 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 70 Invalid, 108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 108 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 21:35:31,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2023-02-15 21:35:31,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 27. [2023-02-15 21:35:31,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 20 states have internal predecessors, (22), 3 states have call successors, (3), 2 states have call predecessors, (3), 4 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2023-02-15 21:35:31,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 30 transitions. [2023-02-15 21:35:31,316 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 30 transitions. Word has length 19 [2023-02-15 21:35:31,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 21:35:31,316 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 30 transitions. [2023-02-15 21:35:31,317 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 7 states have internal predecessors, (15), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-15 21:35:31,317 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 30 transitions. [2023-02-15 21:35:31,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-02-15 21:35:31,317 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 21:35:31,318 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 21:35:31,318 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-02-15 21:35:31,318 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 21:35:31,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 21:35:31,318 INFO L85 PathProgramCache]: Analyzing trace with hash 928601386, now seen corresponding path program 1 times [2023-02-15 21:35:31,318 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 21:35:31,318 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [849903654] [2023-02-15 21:35:31,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 21:35:31,319 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 21:35:31,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:35:31,348 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:35:31,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:35:31,367 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:35:31,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:35:31,378 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:35:31,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:35:31,405 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-15 21:35:31,406 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 21:35:31,406 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [849903654] [2023-02-15 21:35:31,406 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [849903654] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 21:35:31,406 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 21:35:31,407 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-15 21:35:31,409 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [352203896] [2023-02-15 21:35:31,409 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 21:35:31,409 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-15 21:35:31,410 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 21:35:31,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-15 21:35:31,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-02-15 21:35:31,410 INFO L87 Difference]: Start difference. First operand 27 states and 30 transitions. Second operand has 5 states, 4 states have (on average 4.75) internal successors, (19), 5 states have internal predecessors, (19), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2023-02-15 21:35:31,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 21:35:31,441 INFO L93 Difference]: Finished difference Result 39 states and 42 transitions. [2023-02-15 21:35:31,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-02-15 21:35:31,443 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.75) internal successors, (19), 5 states have internal predecessors, (19), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 25 [2023-02-15 21:35:31,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 21:35:31,445 INFO L225 Difference]: With dead ends: 39 [2023-02-15 21:35:31,445 INFO L226 Difference]: Without dead ends: 27 [2023-02-15 21:35:31,445 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-02-15 21:35:31,446 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 7 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 21:35:31,446 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 62 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 21:35:31,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2023-02-15 21:35:31,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2023-02-15 21:35:31,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 19 states have (on average 1.105263157894737) internal successors, (21), 20 states have internal predecessors, (21), 3 states have call successors, (3), 2 states have call predecessors, (3), 4 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2023-02-15 21:35:31,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 29 transitions. [2023-02-15 21:35:31,452 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 29 transitions. Word has length 25 [2023-02-15 21:35:31,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 21:35:31,453 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 29 transitions. [2023-02-15 21:35:31,453 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.75) internal successors, (19), 5 states have internal predecessors, (19), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2023-02-15 21:35:31,453 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 29 transitions. [2023-02-15 21:35:31,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-02-15 21:35:31,454 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 21:35:31,454 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 21:35:31,455 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-02-15 21:35:31,455 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 21:35:31,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 21:35:31,455 INFO L85 PathProgramCache]: Analyzing trace with hash 1102972856, now seen corresponding path program 1 times [2023-02-15 21:35:31,455 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 21:35:31,455 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [245780722] [2023-02-15 21:35:31,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 21:35:31,455 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 21:35:31,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:35:31,655 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:35:31,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:35:31,733 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:35:31,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:35:31,777 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:35:31,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:35:31,815 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-15 21:35:31,815 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 21:35:31,815 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [245780722] [2023-02-15 21:35:31,815 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [245780722] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 21:35:31,816 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [630137369] [2023-02-15 21:35:31,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 21:35:31,816 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 21:35:31,816 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 21:35:31,818 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) [2023-02-15 21:35:31,833 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-02-15 21:35:31,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:35:31,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 32 conjunts are in the unsatisfiable core [2023-02-15 21:35:31,888 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 21:35:32,118 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-02-15 21:35:32,118 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 21:35:32,594 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-15 21:35:32,594 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [630137369] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 21:35:32,594 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 21:35:32,595 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 22 [2023-02-15 21:35:32,595 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [416647398] [2023-02-15 21:35:32,595 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 21:35:32,595 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-02-15 21:35:32,595 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 21:35:32,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-02-15 21:35:32,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=396, Unknown=0, NotChecked=0, Total=462 [2023-02-15 21:35:32,596 INFO L87 Difference]: Start difference. First operand 27 states and 29 transitions. Second operand has 22 states, 20 states have (on average 1.85) internal successors, (37), 16 states have internal predecessors, (37), 7 states have call successors, (7), 1 states have call predecessors, (7), 4 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2023-02-15 21:35:32,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 21:35:32,766 INFO L93 Difference]: Finished difference Result 39 states and 41 transitions. [2023-02-15 21:35:32,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-02-15 21:35:32,766 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 20 states have (on average 1.85) internal successors, (37), 16 states have internal predecessors, (37), 7 states have call successors, (7), 1 states have call predecessors, (7), 4 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) Word has length 26 [2023-02-15 21:35:32,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 21:35:32,767 INFO L225 Difference]: With dead ends: 39 [2023-02-15 21:35:32,767 INFO L226 Difference]: Without dead ends: 35 [2023-02-15 21:35:32,768 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 39 SyntacticMatches, 8 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=106, Invalid=650, Unknown=0, NotChecked=0, Total=756 [2023-02-15 21:35:32,769 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 21 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 186 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 191 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 186 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 21:35:32,769 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 110 Invalid, 191 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 186 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 21:35:32,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2023-02-15 21:35:32,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 30. [2023-02-15 21:35:32,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 21 states have (on average 1.0952380952380953) internal successors, (23), 22 states have internal predecessors, (23), 3 states have call successors, (3), 2 states have call predecessors, (3), 5 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) [2023-02-15 21:35:32,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 32 transitions. [2023-02-15 21:35:32,777 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 32 transitions. Word has length 26 [2023-02-15 21:35:32,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 21:35:32,777 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 32 transitions. [2023-02-15 21:35:32,777 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 20 states have (on average 1.85) internal successors, (37), 16 states have internal predecessors, (37), 7 states have call successors, (7), 1 states have call predecessors, (7), 4 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2023-02-15 21:35:32,777 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 32 transitions. [2023-02-15 21:35:32,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2023-02-15 21:35:32,778 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 21:35:32,778 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 21:35:32,793 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-02-15 21:35:32,987 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-02-15 21:35:32,987 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 21:35:32,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 21:35:32,988 INFO L85 PathProgramCache]: Analyzing trace with hash 550160832, now seen corresponding path program 1 times [2023-02-15 21:35:32,988 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 21:35:32,988 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1225728572] [2023-02-15 21:35:32,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 21:35:32,988 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 21:35:32,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:35:33,106 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:35:33,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:35:33,175 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:35:33,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:35:33,218 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:35:33,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:35:33,256 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:35:33,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:35:33,286 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-02-15 21:35:33,287 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 21:35:33,287 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1225728572] [2023-02-15 21:35:33,287 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1225728572] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 21:35:33,287 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [711737187] [2023-02-15 21:35:33,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 21:35:33,287 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 21:35:33,288 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 21:35:33,289 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) [2023-02-15 21:35:33,291 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-02-15 21:35:33,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:35:33,324 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 40 conjunts are in the unsatisfiable core [2023-02-15 21:35:33,326 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 21:35:33,453 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-02-15 21:35:33,454 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 21:35:34,000 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-15 21:35:34,001 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [711737187] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 21:35:34,001 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 21:35:34,001 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 15] total 24 [2023-02-15 21:35:34,001 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1940023520] [2023-02-15 21:35:34,001 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 21:35:34,002 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-02-15 21:35:34,002 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 21:35:34,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-02-15 21:35:34,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=481, Unknown=0, NotChecked=0, Total=552 [2023-02-15 21:35:34,003 INFO L87 Difference]: Start difference. First operand 30 states and 32 transitions. Second operand has 24 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 17 states have internal predecessors, (41), 7 states have call successors, (7), 1 states have call predecessors, (7), 5 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) [2023-02-15 21:35:34,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 21:35:34,261 INFO L93 Difference]: Finished difference Result 45 states and 47 transitions. [2023-02-15 21:35:34,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-02-15 21:35:34,261 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 17 states have internal predecessors, (41), 7 states have call successors, (7), 1 states have call predecessors, (7), 5 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) Word has length 33 [2023-02-15 21:35:34,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 21:35:34,262 INFO L225 Difference]: With dead ends: 45 [2023-02-15 21:35:34,262 INFO L226 Difference]: Without dead ends: 41 [2023-02-15 21:35:34,263 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 52 SyntacticMatches, 11 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=133, Invalid=923, Unknown=0, NotChecked=0, Total=1056 [2023-02-15 21:35:34,263 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 22 mSDsluCounter, 119 mSDsCounter, 0 mSdLazyCounter, 246 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 252 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 246 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 21:35:34,264 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 135 Invalid, 252 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 246 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 21:35:34,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2023-02-15 21:35:34,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 33. [2023-02-15 21:35:34,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 23 states have (on average 1.0869565217391304) internal successors, (25), 24 states have internal predecessors, (25), 3 states have call successors, (3), 2 states have call predecessors, (3), 6 states have return successors, (7), 6 states have call predecessors, (7), 3 states have call successors, (7) [2023-02-15 21:35:34,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 35 transitions. [2023-02-15 21:35:34,269 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 35 transitions. Word has length 33 [2023-02-15 21:35:34,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 21:35:34,270 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 35 transitions. [2023-02-15 21:35:34,270 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 17 states have internal predecessors, (41), 7 states have call successors, (7), 1 states have call predecessors, (7), 5 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) [2023-02-15 21:35:34,270 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 35 transitions. [2023-02-15 21:35:34,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2023-02-15 21:35:34,274 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 21:35:34,275 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 21:35:34,283 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-02-15 21:35:34,479 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2023-02-15 21:35:34,479 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 21:35:34,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 21:35:34,480 INFO L85 PathProgramCache]: Analyzing trace with hash 780373730, now seen corresponding path program 2 times [2023-02-15 21:35:34,480 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 21:35:34,480 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1406211600] [2023-02-15 21:35:34,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 21:35:34,480 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 21:35:34,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:35:34,607 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:35:34,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:35:34,677 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:35:34,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:35:34,741 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:35:34,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:35:34,784 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:35:34,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:35:34,826 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:35:34,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:35:34,867 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-02-15 21:35:34,867 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 21:35:34,867 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1406211600] [2023-02-15 21:35:34,867 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1406211600] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 21:35:34,867 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [259612365] [2023-02-15 21:35:34,867 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-15 21:35:34,868 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 21:35:34,868 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 21:35:34,869 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) [2023-02-15 21:35:34,871 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-02-15 21:35:34,902 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-15 21:35:34,902 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 21:35:34,903 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 48 conjunts are in the unsatisfiable core [2023-02-15 21:35:34,904 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 21:35:35,065 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-02-15 21:35:35,065 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 21:35:35,807 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-15 21:35:35,807 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [259612365] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 21:35:35,807 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 21:35:35,807 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 18] total 28 [2023-02-15 21:35:35,807 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1660608767] [2023-02-15 21:35:35,808 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 21:35:35,808 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-02-15 21:35:35,808 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 21:35:35,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-02-15 21:35:35,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=668, Unknown=0, NotChecked=0, Total=756 [2023-02-15 21:35:35,809 INFO L87 Difference]: Start difference. First operand 33 states and 35 transitions. Second operand has 28 states, 26 states have (on average 1.8076923076923077) internal successors, (47), 20 states have internal predecessors, (47), 9 states have call successors, (9), 1 states have call predecessors, (9), 6 states have return successors, (11), 8 states have call predecessors, (11), 9 states have call successors, (11) [2023-02-15 21:35:36,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 21:35:36,090 INFO L93 Difference]: Finished difference Result 51 states and 53 transitions. [2023-02-15 21:35:36,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-02-15 21:35:36,090 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 26 states have (on average 1.8076923076923077) internal successors, (47), 20 states have internal predecessors, (47), 9 states have call successors, (9), 1 states have call predecessors, (9), 6 states have return successors, (11), 8 states have call predecessors, (11), 9 states have call successors, (11) Word has length 40 [2023-02-15 21:35:36,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 21:35:36,091 INFO L225 Difference]: With dead ends: 51 [2023-02-15 21:35:36,091 INFO L226 Difference]: Without dead ends: 47 [2023-02-15 21:35:36,092 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 64 SyntacticMatches, 13 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 286 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=163, Invalid=1243, Unknown=0, NotChecked=0, Total=1406 [2023-02-15 21:35:36,092 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 17 mSDsluCounter, 226 mSDsCounter, 0 mSdLazyCounter, 403 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 243 SdHoareTripleChecker+Invalid, 404 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 403 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-15 21:35:36,092 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 243 Invalid, 404 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 403 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-15 21:35:36,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2023-02-15 21:35:36,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 36. [2023-02-15 21:35:36,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 25 states have (on average 1.08) internal successors, (27), 26 states have internal predecessors, (27), 3 states have call successors, (3), 2 states have call predecessors, (3), 7 states have return successors, (8), 7 states have call predecessors, (8), 3 states have call successors, (8) [2023-02-15 21:35:36,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 38 transitions. [2023-02-15 21:35:36,095 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 38 transitions. Word has length 40 [2023-02-15 21:35:36,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 21:35:36,095 INFO L495 AbstractCegarLoop]: Abstraction has 36 states and 38 transitions. [2023-02-15 21:35:36,095 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 26 states have (on average 1.8076923076923077) internal successors, (47), 20 states have internal predecessors, (47), 9 states have call successors, (9), 1 states have call predecessors, (9), 6 states have return successors, (11), 8 states have call predecessors, (11), 9 states have call successors, (11) [2023-02-15 21:35:36,096 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 38 transitions. [2023-02-15 21:35:36,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2023-02-15 21:35:36,096 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 21:35:36,096 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 21:35:36,103 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-02-15 21:35:36,300 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 21:35:36,301 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 21:35:36,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 21:35:36,302 INFO L85 PathProgramCache]: Analyzing trace with hash 866829402, now seen corresponding path program 2 times [2023-02-15 21:35:36,302 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 21:35:36,302 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [225098381] [2023-02-15 21:35:36,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 21:35:36,302 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 21:35:36,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:35:36,444 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:35:36,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:35:36,526 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:35:36,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:35:36,580 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:35:36,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:35:36,625 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:35:36,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:35:36,691 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:35:36,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:35:36,734 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:35:36,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:35:36,773 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-02-15 21:35:36,773 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 21:35:36,774 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [225098381] [2023-02-15 21:35:36,774 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [225098381] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 21:35:36,774 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [746669874] [2023-02-15 21:35:36,774 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-15 21:35:36,774 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 21:35:36,775 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 21:35:36,799 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) [2023-02-15 21:35:36,800 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-02-15 21:35:36,837 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-15 21:35:36,837 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 21:35:36,838 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 56 conjunts are in the unsatisfiable core [2023-02-15 21:35:36,840 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 21:35:37,069 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-02-15 21:35:37,069 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 21:35:37,954 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-02-15 21:35:37,955 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [746669874] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 21:35:37,955 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 21:35:37,955 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 21] total 30 [2023-02-15 21:35:37,955 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [734085933] [2023-02-15 21:35:37,955 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 21:35:37,955 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-02-15 21:35:37,955 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 21:35:37,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-02-15 21:35:37,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=778, Unknown=0, NotChecked=0, Total=870 [2023-02-15 21:35:37,956 INFO L87 Difference]: Start difference. First operand 36 states and 38 transitions. Second operand has 30 states, 29 states have (on average 1.7586206896551724) internal successors, (51), 21 states have internal predecessors, (51), 9 states have call successors, (9), 1 states have call predecessors, (9), 7 states have return successors, (13), 9 states have call predecessors, (13), 9 states have call successors, (13) [2023-02-15 21:35:38,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 21:35:38,343 INFO L93 Difference]: Finished difference Result 57 states and 59 transitions. [2023-02-15 21:35:38,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-02-15 21:35:38,343 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 1.7586206896551724) internal successors, (51), 21 states have internal predecessors, (51), 9 states have call successors, (9), 1 states have call predecessors, (9), 7 states have return successors, (13), 9 states have call predecessors, (13), 9 states have call successors, (13) Word has length 47 [2023-02-15 21:35:38,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 21:35:38,344 INFO L225 Difference]: With dead ends: 57 [2023-02-15 21:35:38,344 INFO L226 Difference]: Without dead ends: 53 [2023-02-15 21:35:38,344 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 78 SyntacticMatches, 15 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 240 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=195, Invalid=1611, Unknown=0, NotChecked=0, Total=1806 [2023-02-15 21:35:38,345 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 20 mSDsluCounter, 207 mSDsCounter, 0 mSdLazyCounter, 416 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 225 SdHoareTripleChecker+Invalid, 420 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 416 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-15 21:35:38,345 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 225 Invalid, 420 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 416 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-15 21:35:38,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2023-02-15 21:35:38,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 39. [2023-02-15 21:35:38,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 27 states have (on average 1.0740740740740742) internal successors, (29), 28 states have internal predecessors, (29), 3 states have call successors, (3), 2 states have call predecessors, (3), 8 states have return successors, (9), 8 states have call predecessors, (9), 3 states have call successors, (9) [2023-02-15 21:35:38,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 41 transitions. [2023-02-15 21:35:38,348 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 41 transitions. Word has length 47 [2023-02-15 21:35:38,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 21:35:38,348 INFO L495 AbstractCegarLoop]: Abstraction has 39 states and 41 transitions. [2023-02-15 21:35:38,348 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 29 states have (on average 1.7586206896551724) internal successors, (51), 21 states have internal predecessors, (51), 9 states have call successors, (9), 1 states have call predecessors, (9), 7 states have return successors, (13), 9 states have call predecessors, (13), 9 states have call successors, (13) [2023-02-15 21:35:38,348 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 41 transitions. [2023-02-15 21:35:38,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2023-02-15 21:35:38,349 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 21:35:38,349 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 21:35:38,369 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-02-15 21:35:38,559 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 21:35:38,559 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 21:35:38,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 21:35:38,559 INFO L85 PathProgramCache]: Analyzing trace with hash -1271721844, now seen corresponding path program 3 times [2023-02-15 21:35:38,560 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 21:35:38,560 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [213857006] [2023-02-15 21:35:38,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 21:35:38,560 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 21:35:38,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:35:38,696 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:35:38,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:35:38,814 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:35:38,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:35:38,882 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:35:38,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:35:38,946 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:35:38,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:35:38,995 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:35:38,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:35:39,042 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:35:39,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:35:39,087 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:35:39,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:35:39,129 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2023-02-15 21:35:39,129 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 21:35:39,129 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [213857006] [2023-02-15 21:35:39,129 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [213857006] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 21:35:39,130 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1103344041] [2023-02-15 21:35:39,130 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-15 21:35:39,130 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 21:35:39,130 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 21:35:39,131 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) [2023-02-15 21:35:39,133 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-02-15 21:35:39,170 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-02-15 21:35:39,170 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 21:35:39,172 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 64 conjunts are in the unsatisfiable core [2023-02-15 21:35:39,173 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 21:35:39,376 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2023-02-15 21:35:39,377 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 21:35:40,398 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-02-15 21:35:40,399 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1103344041] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 21:35:40,399 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 21:35:40,399 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20, 24] total 34 [2023-02-15 21:35:40,399 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1472790471] [2023-02-15 21:35:40,399 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 21:35:40,400 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-02-15 21:35:40,400 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 21:35:40,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-02-15 21:35:40,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=1012, Unknown=0, NotChecked=0, Total=1122 [2023-02-15 21:35:40,402 INFO L87 Difference]: Start difference. First operand 39 states and 41 transitions. Second operand has 34 states, 32 states have (on average 1.78125) internal successors, (57), 24 states have internal predecessors, (57), 11 states have call successors, (11), 1 states have call predecessors, (11), 8 states have return successors, (15), 10 states have call predecessors, (15), 11 states have call successors, (15) [2023-02-15 21:35:40,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 21:35:40,788 INFO L93 Difference]: Finished difference Result 63 states and 65 transitions. [2023-02-15 21:35:40,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-02-15 21:35:40,790 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 32 states have (on average 1.78125) internal successors, (57), 24 states have internal predecessors, (57), 11 states have call successors, (11), 1 states have call predecessors, (11), 8 states have return successors, (15), 10 states have call predecessors, (15), 11 states have call successors, (15) Word has length 54 [2023-02-15 21:35:40,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 21:35:40,791 INFO L225 Difference]: With dead ends: 63 [2023-02-15 21:35:40,791 INFO L226 Difference]: Without dead ends: 59 [2023-02-15 21:35:40,791 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 90 SyntacticMatches, 17 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 422 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=228, Invalid=2028, Unknown=0, NotChecked=0, Total=2256 [2023-02-15 21:35:40,792 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 40 mSDsluCounter, 241 mSDsCounter, 0 mSdLazyCounter, 443 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 260 SdHoareTripleChecker+Invalid, 456 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 443 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-15 21:35:40,792 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 260 Invalid, 456 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 443 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-15 21:35:40,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2023-02-15 21:35:40,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 42. [2023-02-15 21:35:40,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 29 states have (on average 1.0689655172413792) internal successors, (31), 30 states have internal predecessors, (31), 3 states have call successors, (3), 2 states have call predecessors, (3), 9 states have return successors, (10), 9 states have call predecessors, (10), 3 states have call successors, (10) [2023-02-15 21:35:40,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 44 transitions. [2023-02-15 21:35:40,795 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 44 transitions. Word has length 54 [2023-02-15 21:35:40,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 21:35:40,797 INFO L495 AbstractCegarLoop]: Abstraction has 42 states and 44 transitions. [2023-02-15 21:35:40,797 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 32 states have (on average 1.78125) internal successors, (57), 24 states have internal predecessors, (57), 11 states have call successors, (11), 1 states have call predecessors, (11), 8 states have return successors, (15), 10 states have call predecessors, (15), 11 states have call successors, (15) [2023-02-15 21:35:40,797 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 44 transitions. [2023-02-15 21:35:40,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2023-02-15 21:35:40,798 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 21:35:40,798 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 21:35:40,804 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-02-15 21:35:41,006 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-02-15 21:35:41,007 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 21:35:41,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 21:35:41,007 INFO L85 PathProgramCache]: Analyzing trace with hash 1194008948, now seen corresponding path program 3 times [2023-02-15 21:35:41,007 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 21:35:41,007 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [492597452] [2023-02-15 21:35:41,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 21:35:41,008 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 21:35:41,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:35:41,196 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:35:41,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:35:41,291 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:35:41,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:35:41,359 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:35:41,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:35:41,419 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:35:41,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:35:41,491 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:35:41,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:35:41,546 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:35:41,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:35:41,596 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:35:41,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:35:41,640 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:35:41,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:35:41,676 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2023-02-15 21:35:41,677 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 21:35:41,677 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [492597452] [2023-02-15 21:35:41,677 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [492597452] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 21:35:41,677 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1660407587] [2023-02-15 21:35:41,677 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-15 21:35:41,677 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 21:35:41,677 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 21:35:41,678 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) [2023-02-15 21:35:41,680 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-02-15 21:35:41,720 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-02-15 21:35:41,720 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 21:35:41,721 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 72 conjunts are in the unsatisfiable core [2023-02-15 21:35:41,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 21:35:41,999 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-02-15 21:35:41,999 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 21:35:43,356 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-02-15 21:35:43,356 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1660407587] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 21:35:43,356 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 21:35:43,357 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 27] total 36 [2023-02-15 21:35:43,357 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1118145149] [2023-02-15 21:35:43,357 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 21:35:43,357 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2023-02-15 21:35:43,357 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 21:35:43,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2023-02-15 21:35:43,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=1146, Unknown=0, NotChecked=0, Total=1260 [2023-02-15 21:35:43,358 INFO L87 Difference]: Start difference. First operand 42 states and 44 transitions. Second operand has 36 states, 35 states have (on average 1.7428571428571429) internal successors, (61), 25 states have internal predecessors, (61), 11 states have call successors, (11), 1 states have call predecessors, (11), 9 states have return successors, (17), 11 states have call predecessors, (17), 11 states have call successors, (17) [2023-02-15 21:35:43,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 21:35:43,844 INFO L93 Difference]: Finished difference Result 69 states and 71 transitions. [2023-02-15 21:35:43,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-02-15 21:35:43,845 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 35 states have (on average 1.7428571428571429) internal successors, (61), 25 states have internal predecessors, (61), 11 states have call successors, (11), 1 states have call predecessors, (11), 9 states have return successors, (17), 11 states have call predecessors, (17), 11 states have call successors, (17) Word has length 61 [2023-02-15 21:35:43,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 21:35:43,845 INFO L225 Difference]: With dead ends: 69 [2023-02-15 21:35:43,845 INFO L226 Difference]: Without dead ends: 65 [2023-02-15 21:35:43,846 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 104 SyntacticMatches, 19 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 360 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=266, Invalid=2490, Unknown=0, NotChecked=0, Total=2756 [2023-02-15 21:35:43,847 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 26 mSDsluCounter, 248 mSDsCounter, 0 mSdLazyCounter, 505 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 268 SdHoareTripleChecker+Invalid, 514 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 505 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-15 21:35:43,847 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 268 Invalid, 514 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 505 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-15 21:35:43,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2023-02-15 21:35:43,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 45. [2023-02-15 21:35:43,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 31 states have (on average 1.064516129032258) internal successors, (33), 32 states have internal predecessors, (33), 3 states have call successors, (3), 2 states have call predecessors, (3), 10 states have return successors, (11), 10 states have call predecessors, (11), 3 states have call successors, (11) [2023-02-15 21:35:43,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 47 transitions. [2023-02-15 21:35:43,850 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 47 transitions. Word has length 61 [2023-02-15 21:35:43,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 21:35:43,850 INFO L495 AbstractCegarLoop]: Abstraction has 45 states and 47 transitions. [2023-02-15 21:35:43,850 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 35 states have (on average 1.7428571428571429) internal successors, (61), 25 states have internal predecessors, (61), 11 states have call successors, (11), 1 states have call predecessors, (11), 9 states have return successors, (17), 11 states have call predecessors, (17), 11 states have call successors, (17) [2023-02-15 21:35:43,851 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 47 transitions. [2023-02-15 21:35:43,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2023-02-15 21:35:43,851 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 21:35:43,851 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 21:35:43,856 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-02-15 21:35:44,056 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 21:35:44,056 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 21:35:44,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 21:35:44,057 INFO L85 PathProgramCache]: Analyzing trace with hash 809184438, now seen corresponding path program 4 times [2023-02-15 21:35:44,057 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 21:35:44,057 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [897506433] [2023-02-15 21:35:44,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 21:35:44,057 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 21:35:44,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:35:44,224 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:35:44,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:35:44,326 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:35:44,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:35:44,399 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:35:44,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:35:44,465 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:35:44,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:35:44,528 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:35:44,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:35:44,592 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:35:44,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:35:44,641 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:35:44,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:35:44,691 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:35:44,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:35:44,741 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:35:44,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:35:44,787 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 0 proven. 52 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2023-02-15 21:35:44,787 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 21:35:44,787 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [897506433] [2023-02-15 21:35:44,787 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [897506433] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 21:35:44,787 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [553962300] [2023-02-15 21:35:44,788 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-15 21:35:44,788 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 21:35:44,788 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 21:35:44,801 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) [2023-02-15 21:35:44,802 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-02-15 21:35:44,861 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-15 21:35:44,861 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 21:35:44,862 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 80 conjunts are in the unsatisfiable core [2023-02-15 21:35:44,865 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 21:35:45,093 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2023-02-15 21:35:45,093 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 21:35:46,584 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 0 proven. 88 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-02-15 21:35:46,584 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [553962300] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 21:35:46,584 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 21:35:46,584 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 24, 30] total 40 [2023-02-15 21:35:46,584 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1283790531] [2023-02-15 21:35:46,584 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 21:35:46,585 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2023-02-15 21:35:46,585 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 21:35:46,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2023-02-15 21:35:46,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=1428, Unknown=0, NotChecked=0, Total=1560 [2023-02-15 21:35:46,586 INFO L87 Difference]: Start difference. First operand 45 states and 47 transitions. Second operand has 40 states, 38 states have (on average 1.763157894736842) internal successors, (67), 28 states have internal predecessors, (67), 13 states have call successors, (13), 1 states have call predecessors, (13), 10 states have return successors, (19), 12 states have call predecessors, (19), 13 states have call successors, (19) [2023-02-15 21:35:47,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 21:35:47,122 INFO L93 Difference]: Finished difference Result 75 states and 77 transitions. [2023-02-15 21:35:47,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-02-15 21:35:47,122 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 38 states have (on average 1.763157894736842) internal successors, (67), 28 states have internal predecessors, (67), 13 states have call successors, (13), 1 states have call predecessors, (13), 10 states have return successors, (19), 12 states have call predecessors, (19), 13 states have call successors, (19) Word has length 68 [2023-02-15 21:35:47,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 21:35:47,123 INFO L225 Difference]: With dead ends: 75 [2023-02-15 21:35:47,123 INFO L226 Difference]: Without dead ends: 71 [2023-02-15 21:35:47,124 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 118 SyntacticMatches, 19 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 562 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=301, Invalid=3005, Unknown=0, NotChecked=0, Total=3306 [2023-02-15 21:35:47,124 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 49 mSDsluCounter, 291 mSDsCounter, 0 mSdLazyCounter, 587 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 312 SdHoareTripleChecker+Invalid, 610 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 587 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-15 21:35:47,124 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [57 Valid, 312 Invalid, 610 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 587 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-15 21:35:47,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2023-02-15 21:35:47,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 48. [2023-02-15 21:35:47,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 33 states have (on average 1.0606060606060606) internal successors, (35), 34 states have internal predecessors, (35), 3 states have call successors, (3), 2 states have call predecessors, (3), 11 states have return successors, (12), 11 states have call predecessors, (12), 3 states have call successors, (12) [2023-02-15 21:35:47,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 50 transitions. [2023-02-15 21:35:47,131 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 50 transitions. Word has length 68 [2023-02-15 21:35:47,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 21:35:47,133 INFO L495 AbstractCegarLoop]: Abstraction has 48 states and 50 transitions. [2023-02-15 21:35:47,133 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 38 states have (on average 1.763157894736842) internal successors, (67), 28 states have internal predecessors, (67), 13 states have call successors, (13), 1 states have call predecessors, (13), 10 states have return successors, (19), 12 states have call predecessors, (19), 13 states have call successors, (19) [2023-02-15 21:35:47,133 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 50 transitions. [2023-02-15 21:35:47,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2023-02-15 21:35:47,134 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 21:35:47,134 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 21:35:47,141 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-02-15 21:35:47,334 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 21:35:47,335 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 21:35:47,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 21:35:47,335 INFO L85 PathProgramCache]: Analyzing trace with hash -1512865522, now seen corresponding path program 4 times [2023-02-15 21:35:47,335 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 21:35:47,335 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1930674739] [2023-02-15 21:35:47,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 21:35:47,335 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 21:35:47,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:35:47,466 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:35:47,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:35:47,563 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:35:47,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:35:47,644 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:35:47,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:35:47,711 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:35:47,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:35:47,774 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:35:47,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:35:47,833 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:35:47,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:35:47,889 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:35:47,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:35:47,943 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:35:47,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:35:47,990 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:35:47,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:35:48,040 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:35:48,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:35:48,089 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2023-02-15 21:35:48,089 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 21:35:48,089 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1930674739] [2023-02-15 21:35:48,089 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1930674739] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 21:35:48,089 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [746227898] [2023-02-15 21:35:48,090 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-15 21:35:48,090 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 21:35:48,090 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 21:35:48,091 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) [2023-02-15 21:35:48,093 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-02-15 21:35:48,140 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-15 21:35:48,140 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 21:35:48,141 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 88 conjunts are in the unsatisfiable core [2023-02-15 21:35:48,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 21:35:48,435 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2023-02-15 21:35:48,435 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 21:35:50,126 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-02-15 21:35:50,127 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [746227898] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 21:35:50,127 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 21:35:50,127 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 26, 33] total 43 [2023-02-15 21:35:50,127 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1888721292] [2023-02-15 21:35:50,127 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 21:35:50,128 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2023-02-15 21:35:50,129 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 21:35:50,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2023-02-15 21:35:50,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=1665, Unknown=0, NotChecked=0, Total=1806 [2023-02-15 21:35:50,131 INFO L87 Difference]: Start difference. First operand 48 states and 50 transitions. Second operand has 43 states, 41 states have (on average 1.7560975609756098) internal successors, (72), 30 states have internal predecessors, (72), 14 states have call successors, (14), 1 states have call predecessors, (14), 11 states have return successors, (21), 13 states have call predecessors, (21), 14 states have call successors, (21) [2023-02-15 21:35:50,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 21:35:50,810 INFO L93 Difference]: Finished difference Result 81 states and 83 transitions. [2023-02-15 21:35:50,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-02-15 21:35:50,810 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 41 states have (on average 1.7560975609756098) internal successors, (72), 30 states have internal predecessors, (72), 14 states have call successors, (14), 1 states have call predecessors, (14), 11 states have return successors, (21), 13 states have call predecessors, (21), 14 states have call successors, (21) Word has length 75 [2023-02-15 21:35:50,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 21:35:50,811 INFO L225 Difference]: With dead ends: 81 [2023-02-15 21:35:50,811 INFO L226 Difference]: Without dead ends: 77 [2023-02-15 21:35:50,812 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 129 SyntacticMatches, 23 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 637 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=351, Invalid=3681, Unknown=0, NotChecked=0, Total=4032 [2023-02-15 21:35:50,812 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 35 mSDsluCounter, 454 mSDsCounter, 0 mSdLazyCounter, 911 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 476 SdHoareTripleChecker+Invalid, 920 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 911 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-15 21:35:50,812 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 476 Invalid, 920 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 911 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-15 21:35:50,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2023-02-15 21:35:50,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 51. [2023-02-15 21:35:50,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 35 states have (on average 1.0571428571428572) internal successors, (37), 36 states have internal predecessors, (37), 3 states have call successors, (3), 2 states have call predecessors, (3), 12 states have return successors, (13), 12 states have call predecessors, (13), 3 states have call successors, (13) [2023-02-15 21:35:50,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 53 transitions. [2023-02-15 21:35:50,816 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 53 transitions. Word has length 75 [2023-02-15 21:35:50,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 21:35:50,816 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 53 transitions. [2023-02-15 21:35:50,817 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 41 states have (on average 1.7560975609756098) internal successors, (72), 30 states have internal predecessors, (72), 14 states have call successors, (14), 1 states have call predecessors, (14), 11 states have return successors, (21), 13 states have call predecessors, (21), 14 states have call successors, (21) [2023-02-15 21:35:50,817 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 53 transitions. [2023-02-15 21:35:50,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2023-02-15 21:35:50,817 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 21:35:50,817 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 21:35:50,825 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-02-15 21:35:51,023 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-02-15 21:35:51,023 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 21:35:51,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 21:35:51,024 INFO L85 PathProgramCache]: Analyzing trace with hash -1531804832, now seen corresponding path program 5 times [2023-02-15 21:35:51,024 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 21:35:51,024 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1027637446] [2023-02-15 21:35:51,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 21:35:51,024 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 21:35:51,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:35:51,199 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:35:51,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:35:51,322 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:35:51,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:35:51,411 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:35:51,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:35:51,502 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:35:51,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:35:51,573 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:35:51,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:35:51,643 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:35:51,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:35:51,709 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:35:51,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:35:51,772 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:35:51,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:35:51,831 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:35:51,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:35:51,898 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:35:51,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:35:51,961 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:35:51,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:35:52,041 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 0 proven. 80 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2023-02-15 21:35:52,041 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 21:35:52,041 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1027637446] [2023-02-15 21:35:52,042 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1027637446] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 21:35:52,042 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [265802862] [2023-02-15 21:35:52,042 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-15 21:35:52,042 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 21:35:52,042 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 21:35:52,043 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) [2023-02-15 21:35:52,043 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-02-15 21:35:52,097 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2023-02-15 21:35:52,097 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 21:35:52,099 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 96 conjunts are in the unsatisfiable core [2023-02-15 21:35:52,100 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 21:35:52,356 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2023-02-15 21:35:52,356 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 21:35:54,325 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 0 proven. 140 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2023-02-15 21:35:54,326 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [265802862] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 21:35:54,326 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 21:35:54,326 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 28, 36] total 46 [2023-02-15 21:35:54,326 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [242594717] [2023-02-15 21:35:54,326 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 21:35:54,326 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2023-02-15 21:35:54,326 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 21:35:54,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2023-02-15 21:35:54,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=1916, Unknown=0, NotChecked=0, Total=2070 [2023-02-15 21:35:54,328 INFO L87 Difference]: Start difference. First operand 51 states and 53 transitions. Second operand has 46 states, 44 states have (on average 1.75) internal successors, (77), 32 states have internal predecessors, (77), 15 states have call successors, (15), 1 states have call predecessors, (15), 12 states have return successors, (23), 14 states have call predecessors, (23), 15 states have call successors, (23) [2023-02-15 21:35:55,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 21:35:55,015 INFO L93 Difference]: Finished difference Result 87 states and 89 transitions. [2023-02-15 21:35:55,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-02-15 21:35:55,015 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 44 states have (on average 1.75) internal successors, (77), 32 states have internal predecessors, (77), 15 states have call successors, (15), 1 states have call predecessors, (15), 12 states have return successors, (23), 14 states have call predecessors, (23), 15 states have call successors, (23) Word has length 82 [2023-02-15 21:35:55,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 21:35:55,016 INFO L225 Difference]: With dead ends: 87 [2023-02-15 21:35:55,016 INFO L226 Difference]: Without dead ends: 83 [2023-02-15 21:35:55,017 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 143 SyntacticMatches, 24 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 762 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=382, Invalid=4174, Unknown=0, NotChecked=0, Total=4556 [2023-02-15 21:35:55,018 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 69 mSDsluCounter, 440 mSDsCounter, 0 mSdLazyCounter, 818 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 463 SdHoareTripleChecker+Invalid, 853 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 818 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-15 21:35:55,018 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [78 Valid, 463 Invalid, 853 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 818 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-15 21:35:55,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2023-02-15 21:35:55,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 54. [2023-02-15 21:35:55,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 37 states have (on average 1.054054054054054) internal successors, (39), 38 states have internal predecessors, (39), 3 states have call successors, (3), 2 states have call predecessors, (3), 13 states have return successors, (14), 13 states have call predecessors, (14), 3 states have call successors, (14) [2023-02-15 21:35:55,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 56 transitions. [2023-02-15 21:35:55,025 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 56 transitions. Word has length 82 [2023-02-15 21:35:55,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 21:35:55,026 INFO L495 AbstractCegarLoop]: Abstraction has 54 states and 56 transitions. [2023-02-15 21:35:55,026 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 44 states have (on average 1.75) internal successors, (77), 32 states have internal predecessors, (77), 15 states have call successors, (15), 1 states have call predecessors, (15), 12 states have return successors, (23), 14 states have call predecessors, (23), 15 states have call successors, (23) [2023-02-15 21:35:55,026 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 56 transitions. [2023-02-15 21:35:55,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2023-02-15 21:35:55,027 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 21:35:55,027 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 21:35:55,032 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-02-15 21:35:55,231 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-02-15 21:35:55,232 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 21:35:55,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 21:35:55,233 INFO L85 PathProgramCache]: Analyzing trace with hash -1881963736, now seen corresponding path program 5 times [2023-02-15 21:35:55,233 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 21:35:55,233 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [318776308] [2023-02-15 21:35:55,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 21:35:55,233 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 21:35:55,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:35:55,384 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:35:55,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:35:55,518 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:35:55,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:35:55,625 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:35:55,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:35:55,718 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:35:55,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:35:55,819 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:35:55,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:35:55,897 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:35:55,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:35:55,967 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:35:55,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:35:56,039 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:35:56,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:35:56,150 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:35:56,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:35:56,212 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:35:56,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:35:56,271 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:35:56,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:35:56,334 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:35:56,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:35:56,384 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 95 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2023-02-15 21:35:56,384 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 21:35:56,384 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [318776308] [2023-02-15 21:35:56,384 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [318776308] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 21:35:56,384 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [627745222] [2023-02-15 21:35:56,384 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-15 21:35:56,384 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 21:35:56,385 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 21:35:56,386 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) [2023-02-15 21:35:56,418 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-02-15 21:35:56,457 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2023-02-15 21:35:56,457 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 21:35:56,459 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 104 conjunts are in the unsatisfiable core [2023-02-15 21:35:56,461 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 21:35:56,787 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 85 refuted. 0 times theorem prover too weak. 115 trivial. 0 not checked. [2023-02-15 21:35:56,787 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 21:35:59,145 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 170 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-02-15 21:35:59,145 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [627745222] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 21:35:59,145 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 21:35:59,145 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 30, 39] total 48 [2023-02-15 21:35:59,145 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [643613573] [2023-02-15 21:35:59,145 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 21:35:59,146 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2023-02-15 21:35:59,146 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 21:35:59,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2023-02-15 21:35:59,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=2097, Unknown=0, NotChecked=0, Total=2256 [2023-02-15 21:35:59,147 INFO L87 Difference]: Start difference. First operand 54 states and 56 transitions. Second operand has 48 states, 47 states have (on average 1.7234042553191489) internal successors, (81), 33 states have internal predecessors, (81), 15 states have call successors, (15), 1 states have call predecessors, (15), 13 states have return successors, (25), 15 states have call predecessors, (25), 15 states have call successors, (25) [2023-02-15 21:36:00,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 21:36:00,009 INFO L93 Difference]: Finished difference Result 93 states and 95 transitions. [2023-02-15 21:36:00,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-02-15 21:36:00,009 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 47 states have (on average 1.7234042553191489) internal successors, (81), 33 states have internal predecessors, (81), 15 states have call successors, (15), 1 states have call predecessors, (15), 13 states have return successors, (25), 15 states have call predecessors, (25), 15 states have call successors, (25) Word has length 89 [2023-02-15 21:36:00,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 21:36:00,010 INFO L225 Difference]: With dead ends: 93 [2023-02-15 21:36:00,010 INFO L226 Difference]: Without dead ends: 89 [2023-02-15 21:36:00,011 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 154 SyntacticMatches, 29 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 767 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=433, Invalid=4823, Unknown=0, NotChecked=0, Total=5256 [2023-02-15 21:36:00,012 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 39 mSDsluCounter, 558 mSDsCounter, 0 mSdLazyCounter, 1119 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 582 SdHoareTripleChecker+Invalid, 1134 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 1119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-02-15 21:36:00,012 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 582 Invalid, 1134 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 1119 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-02-15 21:36:00,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2023-02-15 21:36:00,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 57. [2023-02-15 21:36:00,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 39 states have (on average 1.0512820512820513) internal successors, (41), 40 states have internal predecessors, (41), 3 states have call successors, (3), 2 states have call predecessors, (3), 14 states have return successors, (15), 14 states have call predecessors, (15), 3 states have call successors, (15) [2023-02-15 21:36:00,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 59 transitions. [2023-02-15 21:36:00,020 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 59 transitions. Word has length 89 [2023-02-15 21:36:00,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 21:36:00,020 INFO L495 AbstractCegarLoop]: Abstraction has 57 states and 59 transitions. [2023-02-15 21:36:00,021 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 47 states have (on average 1.7234042553191489) internal successors, (81), 33 states have internal predecessors, (81), 15 states have call successors, (15), 1 states have call predecessors, (15), 13 states have return successors, (25), 15 states have call predecessors, (25), 15 states have call successors, (25) [2023-02-15 21:36:00,021 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 59 transitions. [2023-02-15 21:36:00,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2023-02-15 21:36:00,021 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 21:36:00,021 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 21:36:00,028 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-02-15 21:36:00,221 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-02-15 21:36:00,222 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 21:36:00,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 21:36:00,222 INFO L85 PathProgramCache]: Analyzing trace with hash 1649915018, now seen corresponding path program 6 times [2023-02-15 21:36:00,222 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 21:36:00,222 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [616795343] [2023-02-15 21:36:00,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 21:36:00,222 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 21:36:00,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:36:00,414 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:36:00,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:36:00,543 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:36:00,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:36:00,649 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:36:00,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:36:00,760 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:36:00,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:36:00,846 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:36:00,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:36:00,927 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:36:00,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:36:01,009 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:36:01,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:36:01,080 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:36:01,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:36:01,152 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:36:01,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:36:01,217 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:36:01,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:36:01,278 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:36:01,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:36:01,343 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:36:01,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:36:01,404 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:36:01,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:36:01,459 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 114 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2023-02-15 21:36:01,459 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 21:36:01,459 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [616795343] [2023-02-15 21:36:01,459 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [616795343] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 21:36:01,460 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [464082669] [2023-02-15 21:36:01,460 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-02-15 21:36:01,460 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 21:36:01,460 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 21:36:01,461 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) [2023-02-15 21:36:01,463 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-02-15 21:36:01,543 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2023-02-15 21:36:01,543 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 21:36:01,545 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 112 conjunts are in the unsatisfiable core [2023-02-15 21:36:01,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 21:36:01,873 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 102 refuted. 0 times theorem prover too weak. 138 trivial. 0 not checked. [2023-02-15 21:36:01,873 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 21:36:04,518 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 204 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-02-15 21:36:04,518 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [464082669] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 21:36:04,518 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 21:36:04,519 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 32, 42] total 52 [2023-02-15 21:36:04,519 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1179916933] [2023-02-15 21:36:04,519 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 21:36:04,519 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2023-02-15 21:36:04,519 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 21:36:04,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2023-02-15 21:36:04,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=2476, Unknown=0, NotChecked=0, Total=2652 [2023-02-15 21:36:04,520 INFO L87 Difference]: Start difference. First operand 57 states and 59 transitions. Second operand has 52 states, 50 states have (on average 1.74) internal successors, (87), 36 states have internal predecessors, (87), 17 states have call successors, (17), 1 states have call predecessors, (17), 14 states have return successors, (27), 16 states have call predecessors, (27), 17 states have call successors, (27) [2023-02-15 21:36:05,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 21:36:05,502 INFO L93 Difference]: Finished difference Result 99 states and 101 transitions. [2023-02-15 21:36:05,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-02-15 21:36:05,503 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 50 states have (on average 1.74) internal successors, (87), 36 states have internal predecessors, (87), 17 states have call successors, (17), 1 states have call predecessors, (17), 14 states have return successors, (27), 16 states have call predecessors, (27), 17 states have call successors, (27) Word has length 96 [2023-02-15 21:36:05,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 21:36:05,504 INFO L225 Difference]: With dead ends: 99 [2023-02-15 21:36:05,504 INFO L226 Difference]: Without dead ends: 95 [2023-02-15 21:36:05,505 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 273 GetRequests, 169 SyntacticMatches, 28 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 970 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=471, Invalid=5535, Unknown=0, NotChecked=0, Total=6006 [2023-02-15 21:36:05,505 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 49 mSDsluCounter, 682 mSDsCounter, 0 mSdLazyCounter, 1294 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 707 SdHoareTripleChecker+Invalid, 1317 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 1294 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-02-15 21:36:05,505 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [59 Valid, 707 Invalid, 1317 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 1294 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-02-15 21:36:05,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2023-02-15 21:36:05,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 60. [2023-02-15 21:36:05,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 41 states have (on average 1.048780487804878) internal successors, (43), 42 states have internal predecessors, (43), 3 states have call successors, (3), 2 states have call predecessors, (3), 15 states have return successors, (16), 15 states have call predecessors, (16), 3 states have call successors, (16) [2023-02-15 21:36:05,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 62 transitions. [2023-02-15 21:36:05,508 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 62 transitions. Word has length 96 [2023-02-15 21:36:05,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 21:36:05,508 INFO L495 AbstractCegarLoop]: Abstraction has 60 states and 62 transitions. [2023-02-15 21:36:05,508 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 50 states have (on average 1.74) internal successors, (87), 36 states have internal predecessors, (87), 17 states have call successors, (17), 1 states have call predecessors, (17), 14 states have return successors, (27), 16 states have call predecessors, (27), 17 states have call successors, (27) [2023-02-15 21:36:05,508 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 62 transitions. [2023-02-15 21:36:05,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2023-02-15 21:36:05,509 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 21:36:05,509 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 21:36:05,516 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-02-15 21:36:05,714 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-02-15 21:36:05,714 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 21:36:05,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 21:36:05,714 INFO L85 PathProgramCache]: Analyzing trace with hash -1794979902, now seen corresponding path program 6 times [2023-02-15 21:36:05,714 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 21:36:05,714 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [96909597] [2023-02-15 21:36:05,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 21:36:05,715 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 21:36:05,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:36:05,867 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:36:05,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:36:05,994 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:36:05,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:36:06,096 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:36:06,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:36:06,196 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:36:06,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:36:06,279 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:36:06,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:36:06,365 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:36:06,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:36:06,437 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:36:06,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:36:06,505 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:36:06,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:36:06,574 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:36:06,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:36:06,650 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:36:06,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:36:06,751 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:36:06,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:36:06,817 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:36:06,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:36:06,873 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:36:06,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:36:06,939 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:36:06,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:36:06,991 INFO L134 CoverageAnalysis]: Checked inductivity of 282 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 150 trivial. 0 not checked. [2023-02-15 21:36:06,991 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 21:36:06,991 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [96909597] [2023-02-15 21:36:06,991 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [96909597] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 21:36:06,991 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [260878619] [2023-02-15 21:36:06,991 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-02-15 21:36:06,992 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 21:36:06,992 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 21:36:06,993 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) [2023-02-15 21:36:06,994 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-02-15 21:36:07,085 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2023-02-15 21:36:07,085 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 21:36:07,087 INFO L263 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 120 conjunts are in the unsatisfiable core [2023-02-15 21:36:07,089 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 21:36:07,506 INFO L134 CoverageAnalysis]: Checked inductivity of 282 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 162 trivial. 0 not checked. [2023-02-15 21:36:07,506 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 21:36:10,375 INFO L134 CoverageAnalysis]: Checked inductivity of 282 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2023-02-15 21:36:10,375 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [260878619] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 21:36:10,375 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 21:36:10,375 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34, 45] total 54 [2023-02-15 21:36:10,375 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1115564526] [2023-02-15 21:36:10,375 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 21:36:10,376 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2023-02-15 21:36:10,376 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 21:36:10,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2023-02-15 21:36:10,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=181, Invalid=2681, Unknown=0, NotChecked=0, Total=2862 [2023-02-15 21:36:10,377 INFO L87 Difference]: Start difference. First operand 60 states and 62 transitions. Second operand has 54 states, 53 states have (on average 1.7169811320754718) internal successors, (91), 37 states have internal predecessors, (91), 17 states have call successors, (17), 1 states have call predecessors, (17), 15 states have return successors, (29), 17 states have call predecessors, (29), 17 states have call successors, (29) [2023-02-15 21:36:11,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 21:36:11,440 INFO L93 Difference]: Finished difference Result 105 states and 107 transitions. [2023-02-15 21:36:11,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-02-15 21:36:11,441 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 53 states have (on average 1.7169811320754718) internal successors, (91), 37 states have internal predecessors, (91), 17 states have call successors, (17), 1 states have call predecessors, (17), 15 states have return successors, (29), 17 states have call predecessors, (29), 17 states have call successors, (29) Word has length 103 [2023-02-15 21:36:11,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 21:36:11,441 INFO L225 Difference]: With dead ends: 105 [2023-02-15 21:36:11,441 INFO L226 Difference]: Without dead ends: 101 [2023-02-15 21:36:11,443 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 294 GetRequests, 181 SyntacticMatches, 32 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 909 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=528, Invalid=6278, Unknown=0, NotChecked=0, Total=6806 [2023-02-15 21:36:11,443 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 53 mSDsluCounter, 605 mSDsCounter, 0 mSdLazyCounter, 1255 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 631 SdHoareTripleChecker+Invalid, 1276 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 1255 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-02-15 21:36:11,444 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [58 Valid, 631 Invalid, 1276 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 1255 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-02-15 21:36:11,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2023-02-15 21:36:11,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 63. [2023-02-15 21:36:11,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 43 states have (on average 1.0465116279069768) internal successors, (45), 44 states have internal predecessors, (45), 3 states have call successors, (3), 2 states have call predecessors, (3), 16 states have return successors, (17), 16 states have call predecessors, (17), 3 states have call successors, (17) [2023-02-15 21:36:11,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 65 transitions. [2023-02-15 21:36:11,447 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 65 transitions. Word has length 103 [2023-02-15 21:36:11,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 21:36:11,447 INFO L495 AbstractCegarLoop]: Abstraction has 63 states and 65 transitions. [2023-02-15 21:36:11,447 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 53 states have (on average 1.7169811320754718) internal successors, (91), 37 states have internal predecessors, (91), 17 states have call successors, (17), 1 states have call predecessors, (17), 15 states have return successors, (29), 17 states have call predecessors, (29), 17 states have call successors, (29) [2023-02-15 21:36:11,447 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 65 transitions. [2023-02-15 21:36:11,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2023-02-15 21:36:11,447 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 21:36:11,448 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 21:36:11,459 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-02-15 21:36:11,653 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-02-15 21:36:11,653 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 21:36:11,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 21:36:11,653 INFO L85 PathProgramCache]: Analyzing trace with hash 848388148, now seen corresponding path program 7 times [2023-02-15 21:36:11,653 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 21:36:11,653 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1116999854] [2023-02-15 21:36:11,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 21:36:11,654 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 21:36:11,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:36:11,857 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:36:11,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:36:12,003 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:36:12,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:36:12,137 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:36:12,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:36:12,274 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:36:12,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:36:12,369 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:36:12,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:36:12,465 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:36:12,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:36:12,546 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:36:12,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:36:12,629 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:36:12,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:36:12,699 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:36:12,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:36:12,771 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:36:12,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:36:12,834 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:36:12,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:36:12,896 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:36:12,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:36:12,956 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:36:12,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:36:13,021 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:36:13,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:36:13,081 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:36:13,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:36:13,140 INFO L134 CoverageAnalysis]: Checked inductivity of 329 backedges. 0 proven. 154 refuted. 0 times theorem prover too weak. 175 trivial. 0 not checked. [2023-02-15 21:36:13,140 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 21:36:13,140 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1116999854] [2023-02-15 21:36:13,140 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1116999854] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 21:36:13,140 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [834899394] [2023-02-15 21:36:13,140 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-02-15 21:36:13,141 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 21:36:13,141 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 21:36:13,142 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) [2023-02-15 21:36:13,144 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-02-15 21:36:13,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:36:13,229 INFO L263 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 128 conjunts are in the unsatisfiable core [2023-02-15 21:36:13,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 21:36:13,592 INFO L134 CoverageAnalysis]: Checked inductivity of 329 backedges. 0 proven. 140 refuted. 0 times theorem prover too weak. 189 trivial. 0 not checked. [2023-02-15 21:36:13,593 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 21:36:16,866 INFO L134 CoverageAnalysis]: Checked inductivity of 329 backedges. 0 proven. 280 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2023-02-15 21:36:16,866 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [834899394] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 21:36:16,866 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 21:36:16,866 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 36, 48] total 58 [2023-02-15 21:36:16,866 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [273703658] [2023-02-15 21:36:16,866 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 21:36:16,867 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2023-02-15 21:36:16,867 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 21:36:16,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2023-02-15 21:36:16,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=198, Invalid=3108, Unknown=0, NotChecked=0, Total=3306 [2023-02-15 21:36:16,868 INFO L87 Difference]: Start difference. First operand 63 states and 65 transitions. Second operand has 58 states, 56 states have (on average 1.7321428571428572) internal successors, (97), 40 states have internal predecessors, (97), 19 states have call successors, (19), 1 states have call predecessors, (19), 16 states have return successors, (31), 18 states have call predecessors, (31), 19 states have call successors, (31) [2023-02-15 21:36:17,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 21:36:17,957 INFO L93 Difference]: Finished difference Result 111 states and 113 transitions. [2023-02-15 21:36:17,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2023-02-15 21:36:17,957 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 56 states have (on average 1.7321428571428572) internal successors, (97), 40 states have internal predecessors, (97), 19 states have call successors, (19), 1 states have call predecessors, (19), 16 states have return successors, (31), 18 states have call predecessors, (31), 19 states have call successors, (31) Word has length 110 [2023-02-15 21:36:17,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 21:36:17,959 INFO L225 Difference]: With dead ends: 111 [2023-02-15 21:36:17,959 INFO L226 Difference]: Without dead ends: 107 [2023-02-15 21:36:17,961 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 313 GetRequests, 194 SyntacticMatches, 33 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1206 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=568, Invalid=7088, Unknown=0, NotChecked=0, Total=7656 [2023-02-15 21:36:17,962 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 89 mSDsluCounter, 631 mSDsCounter, 0 mSdLazyCounter, 1212 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 658 SdHoareTripleChecker+Invalid, 1270 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 1212 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-02-15 21:36:17,963 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [100 Valid, 658 Invalid, 1270 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 1212 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-02-15 21:36:17,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2023-02-15 21:36:17,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 66. [2023-02-15 21:36:17,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 45 states have (on average 1.0444444444444445) internal successors, (47), 46 states have internal predecessors, (47), 3 states have call successors, (3), 2 states have call predecessors, (3), 17 states have return successors, (18), 17 states have call predecessors, (18), 3 states have call successors, (18) [2023-02-15 21:36:17,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 68 transitions. [2023-02-15 21:36:17,969 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 68 transitions. Word has length 110 [2023-02-15 21:36:17,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 21:36:17,970 INFO L495 AbstractCegarLoop]: Abstraction has 66 states and 68 transitions. [2023-02-15 21:36:17,970 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 56 states have (on average 1.7321428571428572) internal successors, (97), 40 states have internal predecessors, (97), 19 states have call successors, (19), 1 states have call predecessors, (19), 16 states have return successors, (31), 18 states have call predecessors, (31), 19 states have call successors, (31) [2023-02-15 21:36:17,970 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 68 transitions. [2023-02-15 21:36:17,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2023-02-15 21:36:17,971 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 21:36:17,971 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 21:36:17,979 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-02-15 21:36:18,177 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-02-15 21:36:18,177 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 21:36:18,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 21:36:18,177 INFO L85 PathProgramCache]: Analyzing trace with hash 1860234972, now seen corresponding path program 7 times [2023-02-15 21:36:18,178 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 21:36:18,178 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1690613340] [2023-02-15 21:36:18,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 21:36:18,178 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 21:36:18,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:36:18,351 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:36:18,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:36:18,492 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:36:18,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:36:18,621 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:36:18,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:36:18,731 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:36:18,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:36:18,837 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:36:18,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:36:18,932 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:36:18,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:36:19,023 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:36:19,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:36:19,106 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:36:19,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:36:19,187 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:36:19,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:36:19,260 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:36:19,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:36:19,328 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:36:19,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:36:19,414 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:36:19,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:36:19,482 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:36:19,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:36:19,546 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:36:19,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:36:19,607 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:36:19,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:36:19,696 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:36:19,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:36:19,752 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 0 proven. 175 refuted. 0 times theorem prover too weak. 203 trivial. 0 not checked. [2023-02-15 21:36:19,753 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 21:36:19,753 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1690613340] [2023-02-15 21:36:19,753 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1690613340] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 21:36:19,753 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [123292106] [2023-02-15 21:36:19,753 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-02-15 21:36:19,753 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 21:36:19,753 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 21:36:19,754 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 21:36:19,756 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-02-15 21:36:19,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:36:19,865 INFO L263 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 136 conjunts are in the unsatisfiable core [2023-02-15 21:36:19,867 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 21:36:20,256 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 0 proven. 161 refuted. 0 times theorem prover too weak. 217 trivial. 0 not checked. [2023-02-15 21:36:20,256 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 21:36:23,963 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 0 proven. 322 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2023-02-15 21:36:23,964 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [123292106] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 21:36:23,964 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 21:36:23,964 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 38, 51] total 61 [2023-02-15 21:36:23,964 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1345005956] [2023-02-15 21:36:23,964 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 21:36:23,966 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2023-02-15 21:36:23,966 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 21:36:23,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2023-02-15 21:36:23,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=207, Invalid=3453, Unknown=0, NotChecked=0, Total=3660 [2023-02-15 21:36:23,968 INFO L87 Difference]: Start difference. First operand 66 states and 68 transitions. Second operand has 61 states, 59 states have (on average 1.728813559322034) internal successors, (102), 42 states have internal predecessors, (102), 20 states have call successors, (20), 1 states have call predecessors, (20), 17 states have return successors, (33), 19 states have call predecessors, (33), 20 states have call successors, (33) [2023-02-15 21:36:25,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 21:36:25,278 INFO L93 Difference]: Finished difference Result 117 states and 119 transitions. [2023-02-15 21:36:25,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2023-02-15 21:36:25,278 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 59 states have (on average 1.728813559322034) internal successors, (102), 42 states have internal predecessors, (102), 20 states have call successors, (20), 1 states have call predecessors, (20), 17 states have return successors, (33), 19 states have call predecessors, (33), 20 states have call successors, (33) Word has length 117 [2023-02-15 21:36:25,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 21:36:25,279 INFO L225 Difference]: With dead ends: 117 [2023-02-15 21:36:25,279 INFO L226 Difference]: Without dead ends: 113 [2023-02-15 21:36:25,280 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 334 GetRequests, 207 SyntacticMatches, 35 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1282 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=636, Invalid=8106, Unknown=0, NotChecked=0, Total=8742 [2023-02-15 21:36:25,281 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 39 mSDsluCounter, 781 mSDsCounter, 0 mSdLazyCounter, 1626 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 809 SdHoareTripleChecker+Invalid, 1641 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 1626 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-02-15 21:36:25,281 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 809 Invalid, 1641 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 1626 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-02-15 21:36:25,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2023-02-15 21:36:25,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 69. [2023-02-15 21:36:25,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 47 states have (on average 1.0425531914893618) internal successors, (49), 48 states have internal predecessors, (49), 3 states have call successors, (3), 2 states have call predecessors, (3), 18 states have return successors, (19), 18 states have call predecessors, (19), 3 states have call successors, (19) [2023-02-15 21:36:25,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 71 transitions. [2023-02-15 21:36:25,283 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 71 transitions. Word has length 117 [2023-02-15 21:36:25,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 21:36:25,284 INFO L495 AbstractCegarLoop]: Abstraction has 69 states and 71 transitions. [2023-02-15 21:36:25,284 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 59 states have (on average 1.728813559322034) internal successors, (102), 42 states have internal predecessors, (102), 20 states have call successors, (20), 1 states have call predecessors, (20), 17 states have return successors, (33), 19 states have call predecessors, (33), 20 states have call successors, (33) [2023-02-15 21:36:25,284 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 71 transitions. [2023-02-15 21:36:25,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2023-02-15 21:36:25,284 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 21:36:25,284 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 21:36:25,294 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-02-15 21:36:25,494 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 21:36:25,494 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 21:36:25,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 21:36:25,494 INFO L85 PathProgramCache]: Analyzing trace with hash 23995998, now seen corresponding path program 8 times [2023-02-15 21:36:25,495 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 21:36:25,495 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [818909243] [2023-02-15 21:36:25,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 21:36:25,495 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 21:36:25,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:36:25,729 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:36:25,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:36:25,894 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:36:25,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:36:26,041 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:36:26,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:36:26,177 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:36:26,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:36:26,317 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:36:26,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:36:26,432 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:36:26,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:36:26,541 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:36:26,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:36:26,636 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:36:26,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:36:26,730 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:36:26,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:36:26,814 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:36:26,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:36:26,898 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:36:26,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:36:26,984 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:36:26,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:36:27,055 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:36:27,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:36:27,126 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:36:27,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:36:27,192 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:36:27,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:36:27,266 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:36:27,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:36:27,331 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:36:27,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:36:27,396 INFO L134 CoverageAnalysis]: Checked inductivity of 432 backedges. 0 proven. 200 refuted. 0 times theorem prover too weak. 232 trivial. 0 not checked. [2023-02-15 21:36:27,396 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 21:36:27,396 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [818909243] [2023-02-15 21:36:27,396 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [818909243] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 21:36:27,396 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [517298348] [2023-02-15 21:36:27,396 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-15 21:36:27,396 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 21:36:27,397 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 21:36:27,397 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 21:36:27,398 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-02-15 21:36:27,505 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-15 21:36:27,505 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 21:36:27,508 INFO L263 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 144 conjunts are in the unsatisfiable core [2023-02-15 21:36:27,510 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 21:36:27,952 INFO L134 CoverageAnalysis]: Checked inductivity of 432 backedges. 0 proven. 184 refuted. 0 times theorem prover too weak. 248 trivial. 0 not checked. [2023-02-15 21:36:27,952 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 21:36:32,011 INFO L134 CoverageAnalysis]: Checked inductivity of 432 backedges. 0 proven. 368 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2023-02-15 21:36:32,012 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [517298348] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 21:36:32,012 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 21:36:32,012 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 40, 54] total 64 [2023-02-15 21:36:32,016 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1698704341] [2023-02-15 21:36:32,017 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 21:36:32,017 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2023-02-15 21:36:32,017 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 21:36:32,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2023-02-15 21:36:32,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=220, Invalid=3812, Unknown=0, NotChecked=0, Total=4032 [2023-02-15 21:36:32,019 INFO L87 Difference]: Start difference. First operand 69 states and 71 transitions. Second operand has 64 states, 62 states have (on average 1.7258064516129032) internal successors, (107), 44 states have internal predecessors, (107), 21 states have call successors, (21), 1 states have call predecessors, (21), 18 states have return successors, (35), 20 states have call predecessors, (35), 21 states have call successors, (35) [2023-02-15 21:36:33,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 21:36:33,334 INFO L93 Difference]: Finished difference Result 123 states and 125 transitions. [2023-02-15 21:36:33,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2023-02-15 21:36:33,335 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 62 states have (on average 1.7258064516129032) internal successors, (107), 44 states have internal predecessors, (107), 21 states have call successors, (21), 1 states have call predecessors, (21), 18 states have return successors, (35), 20 states have call predecessors, (35), 21 states have call successors, (35) Word has length 124 [2023-02-15 21:36:33,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 21:36:33,336 INFO L225 Difference]: With dead ends: 123 [2023-02-15 21:36:33,336 INFO L226 Difference]: Without dead ends: 119 [2023-02-15 21:36:33,338 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 353 GetRequests, 221 SyntacticMatches, 36 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1438 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=673, Invalid=8833, Unknown=0, NotChecked=0, Total=9506 [2023-02-15 21:36:33,339 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 79 mSDsluCounter, 771 mSDsCounter, 0 mSdLazyCounter, 1475 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 800 SdHoareTripleChecker+Invalid, 1529 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 1475 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-02-15 21:36:33,339 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [91 Valid, 800 Invalid, 1529 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 1475 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-02-15 21:36:33,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2023-02-15 21:36:33,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 72. [2023-02-15 21:36:33,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 49 states have (on average 1.0408163265306123) internal successors, (51), 50 states have internal predecessors, (51), 3 states have call successors, (3), 2 states have call predecessors, (3), 19 states have return successors, (20), 19 states have call predecessors, (20), 3 states have call successors, (20) [2023-02-15 21:36:33,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 74 transitions. [2023-02-15 21:36:33,342 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 74 transitions. Word has length 124 [2023-02-15 21:36:33,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 21:36:33,342 INFO L495 AbstractCegarLoop]: Abstraction has 72 states and 74 transitions. [2023-02-15 21:36:33,343 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 62 states have (on average 1.7258064516129032) internal successors, (107), 44 states have internal predecessors, (107), 21 states have call successors, (21), 1 states have call predecessors, (21), 18 states have return successors, (35), 20 states have call predecessors, (35), 21 states have call successors, (35) [2023-02-15 21:36:33,343 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 74 transitions. [2023-02-15 21:36:33,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2023-02-15 21:36:33,343 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 21:36:33,343 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 21:36:33,353 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-02-15 21:36:33,553 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 21:36:33,553 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 21:36:33,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 21:36:33,554 INFO L85 PathProgramCache]: Analyzing trace with hash 1519753334, now seen corresponding path program 8 times [2023-02-15 21:36:33,554 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 21:36:33,554 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1370352877] [2023-02-15 21:36:33,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 21:36:33,554 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 21:36:33,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:36:33,775 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:36:33,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:36:33,946 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:36:33,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:36:34,105 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:36:34,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:36:34,240 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:36:34,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:36:34,371 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:36:34,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:36:34,487 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:36:34,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:36:34,614 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:36:34,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:36:34,720 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:36:34,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:36:34,828 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:36:34,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:36:34,942 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:36:34,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:36:35,028 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:36:35,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:36:35,108 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:36:35,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:36:35,183 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:36:35,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:36:35,259 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:36:35,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:36:35,329 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:36:35,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:36:35,405 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:36:35,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:36:35,479 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:36:35,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:36:35,560 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:36:35,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:36:35,623 INFO L134 CoverageAnalysis]: Checked inductivity of 488 backedges. 0 proven. 224 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2023-02-15 21:36:35,623 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 21:36:35,623 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1370352877] [2023-02-15 21:36:35,623 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1370352877] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 21:36:35,623 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2115077349] [2023-02-15 21:36:35,623 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-15 21:36:35,623 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 21:36:35,623 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 21:36:35,625 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 21:36:35,626 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-02-15 21:36:35,745 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-15 21:36:35,745 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 21:36:35,748 INFO L263 TraceCheckSpWp]: Trace formula consists of 306 conjuncts, 152 conjunts are in the unsatisfiable core [2023-02-15 21:36:35,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 21:36:36,191 INFO L134 CoverageAnalysis]: Checked inductivity of 488 backedges. 0 proven. 208 refuted. 0 times theorem prover too weak. 280 trivial. 0 not checked. [2023-02-15 21:36:36,191 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 21:36:40,720 INFO L134 CoverageAnalysis]: Checked inductivity of 488 backedges. 0 proven. 416 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2023-02-15 21:36:40,722 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2115077349] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 21:36:40,722 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 21:36:40,722 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42, 57] total 66 [2023-02-15 21:36:40,722 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1698265204] [2023-02-15 21:36:40,722 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 21:36:40,723 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2023-02-15 21:36:40,723 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 21:36:40,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2023-02-15 21:36:40,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=225, Invalid=4065, Unknown=0, NotChecked=0, Total=4290 [2023-02-15 21:36:40,724 INFO L87 Difference]: Start difference. First operand 72 states and 74 transitions. Second operand has 66 states, 65 states have (on average 1.7076923076923076) internal successors, (111), 45 states have internal predecessors, (111), 21 states have call successors, (21), 1 states have call predecessors, (21), 19 states have return successors, (37), 21 states have call predecessors, (37), 21 states have call successors, (37) [2023-02-15 21:36:42,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 21:36:42,304 INFO L93 Difference]: Finished difference Result 129 states and 131 transitions. [2023-02-15 21:36:42,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2023-02-15 21:36:42,304 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 65 states have (on average 1.7076923076923076) internal successors, (111), 45 states have internal predecessors, (111), 21 states have call successors, (21), 1 states have call predecessors, (21), 19 states have return successors, (37), 21 states have call predecessors, (37), 21 states have call successors, (37) Word has length 131 [2023-02-15 21:36:42,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 21:36:42,305 INFO L225 Difference]: With dead ends: 129 [2023-02-15 21:36:42,306 INFO L226 Difference]: Without dead ends: 125 [2023-02-15 21:36:42,310 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 374 GetRequests, 233 SyntacticMatches, 40 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1376 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=742, Invalid=9764, Unknown=0, NotChecked=0, Total=10506 [2023-02-15 21:36:42,310 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 66 mSDsluCounter, 886 mSDsCounter, 0 mSdLazyCounter, 1766 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 916 SdHoareTripleChecker+Invalid, 1792 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 1766 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-02-15 21:36:42,310 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [71 Valid, 916 Invalid, 1792 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 1766 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-02-15 21:36:42,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2023-02-15 21:36:42,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 75. [2023-02-15 21:36:42,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 51 states have (on average 1.0392156862745099) internal successors, (53), 52 states have internal predecessors, (53), 3 states have call successors, (3), 2 states have call predecessors, (3), 20 states have return successors, (21), 20 states have call predecessors, (21), 3 states have call successors, (21) [2023-02-15 21:36:42,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 77 transitions. [2023-02-15 21:36:42,314 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 77 transitions. Word has length 131 [2023-02-15 21:36:42,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 21:36:42,314 INFO L495 AbstractCegarLoop]: Abstraction has 75 states and 77 transitions. [2023-02-15 21:36:42,314 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 65 states have (on average 1.7076923076923076) internal successors, (111), 45 states have internal predecessors, (111), 21 states have call successors, (21), 1 states have call predecessors, (21), 19 states have return successors, (37), 21 states have call predecessors, (37), 21 states have call successors, (37) [2023-02-15 21:36:42,314 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 77 transitions. [2023-02-15 21:36:42,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2023-02-15 21:36:42,315 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 21:36:42,315 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 21:36:42,320 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-02-15 21:36:42,520 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 21:36:42,520 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 21:36:42,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 21:36:42,521 INFO L85 PathProgramCache]: Analyzing trace with hash 128231176, now seen corresponding path program 9 times [2023-02-15 21:36:42,521 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 21:36:42,521 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [559988207] [2023-02-15 21:36:42,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 21:36:42,521 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 21:36:42,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:36:42,810 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:36:42,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:36:43,015 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:36:43,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:36:43,192 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:36:43,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:36:43,339 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:36:43,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:36:43,488 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:36:43,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:36:43,622 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:36:43,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:36:43,744 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:36:43,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:36:43,882 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:36:43,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:36:43,986 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:36:43,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:36:44,086 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:36:44,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:36:44,185 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:36:44,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:36:44,275 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:36:44,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:36:44,358 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:36:44,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:36:44,440 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:36:44,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:36:44,523 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:36:44,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:36:44,600 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:36:44,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:36:44,672 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:36:44,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:36:44,743 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:36:44,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:36:44,813 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:36:44,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:36:44,888 INFO L134 CoverageAnalysis]: Checked inductivity of 549 backedges. 0 proven. 252 refuted. 0 times theorem prover too weak. 297 trivial. 0 not checked. [2023-02-15 21:36:44,889 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 21:36:44,889 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [559988207] [2023-02-15 21:36:44,889 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [559988207] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 21:36:44,889 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2114504886] [2023-02-15 21:36:44,889 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-15 21:36:44,889 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 21:36:44,889 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 21:36:44,890 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 21:36:44,893 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-02-15 21:36:45,034 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2023-02-15 21:36:45,035 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 21:36:45,037 INFO L263 TraceCheckSpWp]: Trace formula consists of 321 conjuncts, 160 conjunts are in the unsatisfiable core [2023-02-15 21:36:45,039 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 21:36:45,475 INFO L134 CoverageAnalysis]: Checked inductivity of 549 backedges. 0 proven. 234 refuted. 0 times theorem prover too weak. 315 trivial. 0 not checked. [2023-02-15 21:36:45,476 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 21:36:50,370 INFO L134 CoverageAnalysis]: Checked inductivity of 549 backedges. 0 proven. 468 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2023-02-15 21:36:50,370 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2114504886] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 21:36:50,370 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 21:36:50,371 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 44, 60] total 70 [2023-02-15 21:36:50,371 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1931089391] [2023-02-15 21:36:50,371 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 21:36:50,371 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 70 states [2023-02-15 21:36:50,371 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 21:36:50,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2023-02-15 21:36:50,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=242, Invalid=4588, Unknown=0, NotChecked=0, Total=4830 [2023-02-15 21:36:50,373 INFO L87 Difference]: Start difference. First operand 75 states and 77 transitions. Second operand has 70 states, 68 states have (on average 1.7205882352941178) internal successors, (117), 48 states have internal predecessors, (117), 23 states have call successors, (23), 1 states have call predecessors, (23), 20 states have return successors, (39), 22 states have call predecessors, (39), 23 states have call successors, (39) [2023-02-15 21:36:52,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 21:36:52,173 INFO L93 Difference]: Finished difference Result 135 states and 137 transitions. [2023-02-15 21:36:52,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2023-02-15 21:36:52,174 INFO L78 Accepts]: Start accepts. Automaton has has 70 states, 68 states have (on average 1.7205882352941178) internal successors, (117), 48 states have internal predecessors, (117), 23 states have call successors, (23), 1 states have call predecessors, (23), 20 states have return successors, (39), 22 states have call predecessors, (39), 23 states have call successors, (39) Word has length 138 [2023-02-15 21:36:52,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 21:36:52,174 INFO L225 Difference]: With dead ends: 135 [2023-02-15 21:36:52,174 INFO L226 Difference]: Without dead ends: 131 [2023-02-15 21:36:52,176 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 393 GetRequests, 247 SyntacticMatches, 40 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1716 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=786, Invalid=10770, Unknown=0, NotChecked=0, Total=11556 [2023-02-15 21:36:52,176 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 52 mSDsluCounter, 1151 mSDsCounter, 0 mSdLazyCounter, 2204 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 1182 SdHoareTripleChecker+Invalid, 2227 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 2204 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-02-15 21:36:52,176 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [65 Valid, 1182 Invalid, 2227 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 2204 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-02-15 21:36:52,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2023-02-15 21:36:52,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 78. [2023-02-15 21:36:52,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 53 states have (on average 1.0377358490566038) internal successors, (55), 54 states have internal predecessors, (55), 3 states have call successors, (3), 2 states have call predecessors, (3), 21 states have return successors, (22), 21 states have call predecessors, (22), 3 states have call successors, (22) [2023-02-15 21:36:52,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 80 transitions. [2023-02-15 21:36:52,179 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 80 transitions. Word has length 138 [2023-02-15 21:36:52,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 21:36:52,179 INFO L495 AbstractCegarLoop]: Abstraction has 78 states and 80 transitions. [2023-02-15 21:36:52,179 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 70 states, 68 states have (on average 1.7205882352941178) internal successors, (117), 48 states have internal predecessors, (117), 23 states have call successors, (23), 1 states have call predecessors, (23), 20 states have return successors, (39), 22 states have call predecessors, (39), 23 states have call successors, (39) [2023-02-15 21:36:52,179 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 80 transitions. [2023-02-15 21:36:52,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2023-02-15 21:36:52,180 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 21:36:52,180 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 21:36:52,195 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-02-15 21:36:52,380 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 21:36:52,381 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 21:36:52,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 21:36:52,381 INFO L85 PathProgramCache]: Analyzing trace with hash -219126640, now seen corresponding path program 9 times [2023-02-15 21:36:52,381 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 21:36:52,381 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [592036262] [2023-02-15 21:36:52,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 21:36:52,381 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 21:36:52,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:36:52,646 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:36:52,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:36:52,854 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:36:52,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:36:53,068 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:36:53,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:36:53,249 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:36:53,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:36:53,403 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:36:53,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:36:53,543 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:36:53,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:36:53,673 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:36:53,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:36:53,805 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:36:53,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:36:53,922 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:36:53,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:36:54,053 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:36:54,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:36:54,152 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:36:54,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:36:54,247 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:36:54,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:36:54,345 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:36:54,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:36:54,435 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:36:54,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:36:54,526 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:36:54,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:36:54,616 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:36:54,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:36:54,691 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:36:54,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:36:54,777 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:36:54,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:36:54,850 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:36:54,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:36:54,924 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:36:54,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:36:54,990 INFO L134 CoverageAnalysis]: Checked inductivity of 612 backedges. 0 proven. 279 refuted. 0 times theorem prover too weak. 333 trivial. 0 not checked. [2023-02-15 21:36:54,991 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 21:36:54,991 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [592036262] [2023-02-15 21:36:54,991 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [592036262] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 21:36:54,991 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1439885092] [2023-02-15 21:36:54,991 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-15 21:36:54,991 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 21:36:54,991 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 21:36:54,992 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 21:36:54,993 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-02-15 21:36:55,141 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2023-02-15 21:36:55,141 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 21:36:55,146 WARN L261 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 168 conjunts are in the unsatisfiable core [2023-02-15 21:36:55,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 21:36:55,635 INFO L134 CoverageAnalysis]: Checked inductivity of 612 backedges. 0 proven. 261 refuted. 0 times theorem prover too weak. 351 trivial. 0 not checked. [2023-02-15 21:36:55,635 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 21:37:01,054 INFO L134 CoverageAnalysis]: Checked inductivity of 612 backedges. 0 proven. 522 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2023-02-15 21:37:01,055 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1439885092] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 21:37:01,055 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 21:37:01,055 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 46, 63] total 72 [2023-02-15 21:37:01,055 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [916552004] [2023-02-15 21:37:01,055 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 21:37:01,057 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 72 states [2023-02-15 21:37:01,058 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 21:37:01,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2023-02-15 21:37:01,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=247, Invalid=4865, Unknown=0, NotChecked=0, Total=5112 [2023-02-15 21:37:01,059 INFO L87 Difference]: Start difference. First operand 78 states and 80 transitions. Second operand has 72 states, 71 states have (on average 1.704225352112676) internal successors, (121), 49 states have internal predecessors, (121), 23 states have call successors, (23), 1 states have call predecessors, (23), 21 states have return successors, (41), 23 states have call predecessors, (41), 23 states have call successors, (41) [2023-02-15 21:37:02,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 21:37:02,906 INFO L93 Difference]: Finished difference Result 141 states and 143 transitions. [2023-02-15 21:37:02,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2023-02-15 21:37:02,907 INFO L78 Accepts]: Start accepts. Automaton has has 72 states, 71 states have (on average 1.704225352112676) internal successors, (121), 49 states have internal predecessors, (121), 23 states have call successors, (23), 1 states have call predecessors, (23), 21 states have return successors, (41), 23 states have call predecessors, (41), 23 states have call successors, (41) Word has length 145 [2023-02-15 21:37:02,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 21:37:02,908 INFO L225 Difference]: With dead ends: 141 [2023-02-15 21:37:02,908 INFO L226 Difference]: Without dead ends: 137 [2023-02-15 21:37:02,909 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 414 GetRequests, 258 SyntacticMatches, 45 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1735 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=861, Invalid=11795, Unknown=0, NotChecked=0, Total=12656 [2023-02-15 21:37:02,909 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 27 mSDsluCounter, 1083 mSDsCounter, 0 mSdLazyCounter, 2171 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 1115 SdHoareTripleChecker+Invalid, 2179 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 2171 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-02-15 21:37:02,909 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 1115 Invalid, 2179 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 2171 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-02-15 21:37:02,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2023-02-15 21:37:02,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 81. [2023-02-15 21:37:02,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 55 states have (on average 1.0363636363636364) internal successors, (57), 56 states have internal predecessors, (57), 3 states have call successors, (3), 2 states have call predecessors, (3), 22 states have return successors, (23), 22 states have call predecessors, (23), 3 states have call successors, (23) [2023-02-15 21:37:02,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 83 transitions. [2023-02-15 21:37:02,912 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 83 transitions. Word has length 145 [2023-02-15 21:37:02,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 21:37:02,913 INFO L495 AbstractCegarLoop]: Abstraction has 81 states and 83 transitions. [2023-02-15 21:37:02,913 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 72 states, 71 states have (on average 1.704225352112676) internal successors, (121), 49 states have internal predecessors, (121), 23 states have call successors, (23), 1 states have call predecessors, (23), 21 states have return successors, (41), 23 states have call predecessors, (41), 23 states have call successors, (41) [2023-02-15 21:37:02,913 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 83 transitions. [2023-02-15 21:37:02,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2023-02-15 21:37:02,914 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 21:37:02,914 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 21:37:02,921 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-02-15 21:37:03,122 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 21:37:03,122 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 21:37:03,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 21:37:03,129 INFO L85 PathProgramCache]: Analyzing trace with hash 1955824178, now seen corresponding path program 10 times [2023-02-15 21:37:03,129 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 21:37:03,129 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1087625069] [2023-02-15 21:37:03,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 21:37:03,130 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 21:37:03,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:37:03,466 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:37:03,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:37:03,714 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:37:03,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:37:03,905 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:37:03,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:37:04,096 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:37:04,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:37:04,274 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:37:04,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:37:04,505 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:37:04,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:37:04,666 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:37:04,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:37:04,803 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:37:04,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:37:04,934 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:37:04,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:37:05,082 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:37:05,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:37:05,190 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:37:05,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:37:05,294 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:37:05,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:37:05,405 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:37:05,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:37:05,501 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:37:05,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:37:05,598 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:37:05,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:37:05,696 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:37:05,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:37:05,782 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:37:05,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:37:05,864 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:37:05,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:37:05,942 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:37:05,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:37:06,024 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:37:06,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:37:06,112 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:37:06,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:37:06,187 INFO L134 CoverageAnalysis]: Checked inductivity of 680 backedges. 0 proven. 310 refuted. 0 times theorem prover too weak. 370 trivial. 0 not checked. [2023-02-15 21:37:06,187 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 21:37:06,187 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1087625069] [2023-02-15 21:37:06,187 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1087625069] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 21:37:06,188 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1178816717] [2023-02-15 21:37:06,188 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-15 21:37:06,188 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 21:37:06,188 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 21:37:06,189 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 21:37:06,190 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-02-15 21:37:06,354 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-15 21:37:06,354 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 21:37:06,357 WARN L261 TraceCheckSpWp]: Trace formula consists of 351 conjuncts, 176 conjunts are in the unsatisfiable core [2023-02-15 21:37:06,360 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 21:37:06,844 INFO L134 CoverageAnalysis]: Checked inductivity of 680 backedges. 0 proven. 290 refuted. 0 times theorem prover too weak. 390 trivial. 0 not checked. [2023-02-15 21:37:06,844 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 21:37:12,851 INFO L134 CoverageAnalysis]: Checked inductivity of 680 backedges. 0 proven. 580 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2023-02-15 21:37:12,851 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1178816717] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 21:37:12,851 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 21:37:12,851 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 48, 66] total 76 [2023-02-15 21:37:12,851 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1884981580] [2023-02-15 21:37:12,851 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 21:37:12,852 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 76 states [2023-02-15 21:37:12,852 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 21:37:12,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2023-02-15 21:37:12,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=264, Invalid=5436, Unknown=0, NotChecked=0, Total=5700 [2023-02-15 21:37:12,853 INFO L87 Difference]: Start difference. First operand 81 states and 83 transitions. Second operand has 76 states, 74 states have (on average 1.7162162162162162) internal successors, (127), 52 states have internal predecessors, (127), 25 states have call successors, (25), 1 states have call predecessors, (25), 22 states have return successors, (43), 24 states have call predecessors, (43), 25 states have call successors, (43) [2023-02-15 21:37:14,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 21:37:14,678 INFO L93 Difference]: Finished difference Result 147 states and 149 transitions. [2023-02-15 21:37:14,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2023-02-15 21:37:14,678 INFO L78 Accepts]: Start accepts. Automaton has has 76 states, 74 states have (on average 1.7162162162162162) internal successors, (127), 52 states have internal predecessors, (127), 25 states have call successors, (25), 1 states have call predecessors, (25), 22 states have return successors, (43), 24 states have call predecessors, (43), 25 states have call successors, (43) Word has length 152 [2023-02-15 21:37:14,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 21:37:14,679 INFO L225 Difference]: With dead ends: 147 [2023-02-15 21:37:14,679 INFO L226 Difference]: Without dead ends: 143 [2023-02-15 21:37:14,680 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 433 GetRequests, 272 SyntacticMatches, 45 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2046 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=907, Invalid=12899, Unknown=0, NotChecked=0, Total=13806 [2023-02-15 21:37:14,681 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 141 mSDsluCounter, 1142 mSDsCounter, 0 mSdLazyCounter, 2169 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 155 SdHoareTripleChecker+Valid, 1175 SdHoareTripleChecker+Invalid, 2271 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 2169 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-02-15 21:37:14,681 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [155 Valid, 1175 Invalid, 2271 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 2169 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-02-15 21:37:14,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2023-02-15 21:37:14,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 84. [2023-02-15 21:37:14,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 57 states have (on average 1.0350877192982457) internal successors, (59), 58 states have internal predecessors, (59), 3 states have call successors, (3), 2 states have call predecessors, (3), 23 states have return successors, (24), 23 states have call predecessors, (24), 3 states have call successors, (24) [2023-02-15 21:37:14,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 86 transitions. [2023-02-15 21:37:14,684 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 86 transitions. Word has length 152 [2023-02-15 21:37:14,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 21:37:14,684 INFO L495 AbstractCegarLoop]: Abstraction has 84 states and 86 transitions. [2023-02-15 21:37:14,685 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 76 states, 74 states have (on average 1.7162162162162162) internal successors, (127), 52 states have internal predecessors, (127), 25 states have call successors, (25), 1 states have call predecessors, (25), 22 states have return successors, (43), 24 states have call predecessors, (43), 25 states have call successors, (43) [2023-02-15 21:37:14,685 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 86 transitions. [2023-02-15 21:37:14,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2023-02-15 21:37:14,686 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 21:37:14,686 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 21:37:14,693 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2023-02-15 21:37:14,891 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 21:37:14,892 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 21:37:14,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 21:37:14,892 INFO L85 PathProgramCache]: Analyzing trace with hash -1972833494, now seen corresponding path program 10 times [2023-02-15 21:37:14,892 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 21:37:14,892 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1109532435] [2023-02-15 21:37:14,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 21:37:14,892 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 21:37:14,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:37:15,179 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:37:15,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:37:15,410 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:37:15,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:37:15,620 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:37:15,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:37:15,809 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:37:15,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:37:15,988 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:37:15,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:37:16,172 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:37:16,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:37:16,331 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:37:16,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:37:16,501 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:37:16,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:37:16,640 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:37:16,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:37:16,765 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:37:16,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:37:16,885 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:37:16,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:37:17,000 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:37:17,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:37:17,115 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:37:17,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:37:17,217 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:37:17,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:37:17,312 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:37:17,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:37:17,403 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:37:17,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:37:17,495 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:37:17,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:37:17,587 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:37:17,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:37:17,668 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:37:17,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:37:17,749 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:37:17,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:37:17,838 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:37:17,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:37:17,917 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:37:17,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:37:17,996 INFO L134 CoverageAnalysis]: Checked inductivity of 750 backedges. 0 proven. 340 refuted. 0 times theorem prover too weak. 410 trivial. 0 not checked. [2023-02-15 21:37:17,996 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 21:37:17,996 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1109532435] [2023-02-15 21:37:17,996 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1109532435] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 21:37:17,996 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1822715572] [2023-02-15 21:37:17,996 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-15 21:37:17,996 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 21:37:17,996 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 21:37:17,997 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 21:37:17,998 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-02-15 21:37:18,181 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-15 21:37:18,181 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 21:37:18,183 WARN L261 TraceCheckSpWp]: Trace formula consists of 366 conjuncts, 184 conjunts are in the unsatisfiable core [2023-02-15 21:37:18,186 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 21:37:18,728 INFO L134 CoverageAnalysis]: Checked inductivity of 750 backedges. 0 proven. 320 refuted. 0 times theorem prover too weak. 430 trivial. 0 not checked. [2023-02-15 21:37:18,728 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 21:37:25,069 INFO L134 CoverageAnalysis]: Checked inductivity of 750 backedges. 0 proven. 640 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2023-02-15 21:37:25,069 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1822715572] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 21:37:25,070 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 21:37:25,070 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50, 69] total 78 [2023-02-15 21:37:25,070 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [115431219] [2023-02-15 21:37:25,070 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 21:37:25,070 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 78 states [2023-02-15 21:37:25,070 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 21:37:25,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2023-02-15 21:37:25,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=269, Invalid=5737, Unknown=0, NotChecked=0, Total=6006 [2023-02-15 21:37:25,071 INFO L87 Difference]: Start difference. First operand 84 states and 86 transitions. Second operand has 78 states, 77 states have (on average 1.7012987012987013) internal successors, (131), 53 states have internal predecessors, (131), 25 states have call successors, (25), 1 states have call predecessors, (25), 23 states have return successors, (45), 25 states have call predecessors, (45), 25 states have call successors, (45) [2023-02-15 21:37:27,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 21:37:27,037 INFO L93 Difference]: Finished difference Result 153 states and 155 transitions. [2023-02-15 21:37:27,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2023-02-15 21:37:27,038 INFO L78 Accepts]: Start accepts. Automaton has has 78 states, 77 states have (on average 1.7012987012987013) internal successors, (131), 53 states have internal predecessors, (131), 25 states have call successors, (25), 1 states have call predecessors, (25), 23 states have return successors, (45), 25 states have call predecessors, (45), 25 states have call successors, (45) Word has length 159 [2023-02-15 21:37:27,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 21:37:27,042 INFO L225 Difference]: With dead ends: 153 [2023-02-15 21:37:27,042 INFO L226 Difference]: Without dead ends: 149 [2023-02-15 21:37:27,044 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 454 GetRequests, 284 SyntacticMatches, 49 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1940 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=988, Invalid=14018, Unknown=0, NotChecked=0, Total=15006 [2023-02-15 21:37:27,044 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 88 mSDsluCounter, 1114 mSDsCounter, 0 mSdLazyCounter, 2232 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 1148 SdHoareTripleChecker+Invalid, 2268 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 2232 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-02-15 21:37:27,044 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [93 Valid, 1148 Invalid, 2268 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 2232 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-02-15 21:37:27,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2023-02-15 21:37:27,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 87. [2023-02-15 21:37:27,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 59 states have (on average 1.0338983050847457) internal successors, (61), 60 states have internal predecessors, (61), 3 states have call successors, (3), 2 states have call predecessors, (3), 24 states have return successors, (25), 24 states have call predecessors, (25), 3 states have call successors, (25) [2023-02-15 21:37:27,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 89 transitions. [2023-02-15 21:37:27,053 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 89 transitions. Word has length 159 [2023-02-15 21:37:27,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 21:37:27,054 INFO L495 AbstractCegarLoop]: Abstraction has 87 states and 89 transitions. [2023-02-15 21:37:27,054 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 78 states, 77 states have (on average 1.7012987012987013) internal successors, (131), 53 states have internal predecessors, (131), 25 states have call successors, (25), 1 states have call predecessors, (25), 23 states have return successors, (45), 25 states have call predecessors, (45), 25 states have call successors, (45) [2023-02-15 21:37:27,054 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 89 transitions. [2023-02-15 21:37:27,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2023-02-15 21:37:27,055 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 21:37:27,055 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 12, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 21:37:27,064 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2023-02-15 21:37:27,265 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2023-02-15 21:37:27,265 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 21:37:27,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 21:37:27,265 INFO L85 PathProgramCache]: Analyzing trace with hash -1740548132, now seen corresponding path program 11 times [2023-02-15 21:37:27,265 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 21:37:27,265 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2016081874] [2023-02-15 21:37:27,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 21:37:27,265 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 21:37:27,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:37:27,595 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:37:27,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:37:27,852 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:37:27,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:37:28,085 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:37:28,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:37:28,302 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:37:28,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:37:28,501 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:37:28,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:37:28,695 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:37:28,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:37:28,863 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:37:28,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:37:29,029 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:37:29,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:37:29,183 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:37:29,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:37:29,326 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:37:29,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:37:29,481 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:37:29,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:37:29,603 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:37:29,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:37:29,715 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:37:29,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:37:29,831 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:37:29,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:37:29,931 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:37:29,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:37:30,031 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:37:30,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:37:30,127 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:37:30,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:37:30,216 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:37:30,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:37:30,300 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:37:30,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:37:30,387 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:37:30,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:37:30,467 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:37:30,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:37:30,550 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:37:30,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:37:30,632 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:37:30,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:37:30,722 INFO L134 CoverageAnalysis]: Checked inductivity of 825 backedges. 0 proven. 374 refuted. 0 times theorem prover too weak. 451 trivial. 0 not checked. [2023-02-15 21:37:30,723 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 21:37:30,723 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2016081874] [2023-02-15 21:37:30,723 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2016081874] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 21:37:30,723 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1497902161] [2023-02-15 21:37:30,723 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-15 21:37:30,723 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 21:37:30,723 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 21:37:30,724 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 21:37:30,724 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-02-15 21:37:30,926 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2023-02-15 21:37:30,927 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 21:37:30,929 WARN L261 TraceCheckSpWp]: Trace formula consists of 381 conjuncts, 192 conjunts are in the unsatisfiable core [2023-02-15 21:37:30,932 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 21:37:31,458 INFO L134 CoverageAnalysis]: Checked inductivity of 825 backedges. 0 proven. 352 refuted. 0 times theorem prover too weak. 473 trivial. 0 not checked. [2023-02-15 21:37:31,458 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 21:37:38,369 INFO L134 CoverageAnalysis]: Checked inductivity of 825 backedges. 0 proven. 704 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2023-02-15 21:37:38,369 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1497902161] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 21:37:38,369 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 21:37:38,369 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 52, 72] total 82 [2023-02-15 21:37:38,369 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1209683581] [2023-02-15 21:37:38,369 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 21:37:38,370 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 82 states [2023-02-15 21:37:38,370 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 21:37:38,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2023-02-15 21:37:38,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=286, Invalid=6356, Unknown=0, NotChecked=0, Total=6642 [2023-02-15 21:37:38,371 INFO L87 Difference]: Start difference. First operand 87 states and 89 transitions. Second operand has 82 states, 80 states have (on average 1.7125) internal successors, (137), 56 states have internal predecessors, (137), 27 states have call successors, (27), 1 states have call predecessors, (27), 24 states have return successors, (47), 26 states have call predecessors, (47), 27 states have call successors, (47) [2023-02-15 21:37:40,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 21:37:40,596 INFO L93 Difference]: Finished difference Result 159 states and 161 transitions. [2023-02-15 21:37:40,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2023-02-15 21:37:40,596 INFO L78 Accepts]: Start accepts. Automaton has has 82 states, 80 states have (on average 1.7125) internal successors, (137), 56 states have internal predecessors, (137), 27 states have call successors, (27), 1 states have call predecessors, (27), 24 states have return successors, (47), 26 states have call predecessors, (47), 27 states have call successors, (47) Word has length 166 [2023-02-15 21:37:40,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 21:37:40,597 INFO L225 Difference]: With dead ends: 159 [2023-02-15 21:37:40,597 INFO L226 Difference]: Without dead ends: 155 [2023-02-15 21:37:40,599 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 473 GetRequests, 298 SyntacticMatches, 49 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2374 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=1036, Invalid=15220, Unknown=0, NotChecked=0, Total=16256 [2023-02-15 21:37:40,599 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 74 mSDsluCounter, 1377 mSDsCounter, 0 mSdLazyCounter, 2691 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 1412 SdHoareTripleChecker+Invalid, 2722 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 2691 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-02-15 21:37:40,599 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [89 Valid, 1412 Invalid, 2722 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 2691 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-02-15 21:37:40,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2023-02-15 21:37:40,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 90. [2023-02-15 21:37:40,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 61 states have (on average 1.0327868852459017) internal successors, (63), 62 states have internal predecessors, (63), 3 states have call successors, (3), 2 states have call predecessors, (3), 25 states have return successors, (26), 25 states have call predecessors, (26), 3 states have call successors, (26) [2023-02-15 21:37:40,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 92 transitions. [2023-02-15 21:37:40,602 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 92 transitions. Word has length 166 [2023-02-15 21:37:40,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 21:37:40,603 INFO L495 AbstractCegarLoop]: Abstraction has 90 states and 92 transitions. [2023-02-15 21:37:40,603 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 82 states, 80 states have (on average 1.7125) internal successors, (137), 56 states have internal predecessors, (137), 27 states have call successors, (27), 1 states have call predecessors, (27), 24 states have return successors, (47), 26 states have call predecessors, (47), 27 states have call successors, (47) [2023-02-15 21:37:40,603 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 92 transitions. [2023-02-15 21:37:40,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2023-02-15 21:37:40,604 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 21:37:40,604 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 21:37:40,613 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2023-02-15 21:37:40,809 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2023-02-15 21:37:40,809 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 21:37:40,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 21:37:40,810 INFO L85 PathProgramCache]: Analyzing trace with hash 85910596, now seen corresponding path program 11 times [2023-02-15 21:37:40,810 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 21:37:40,810 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [871505419] [2023-02-15 21:37:40,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 21:37:40,810 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 21:37:40,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:37:41,144 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:37:41,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:37:41,465 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:37:41,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:37:41,719 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:37:41,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:37:41,974 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:37:41,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:37:42,187 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:37:42,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:37:42,398 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:37:42,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:37:42,597 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:37:42,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:37:42,781 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:37:42,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:37:42,954 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:37:42,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:37:43,106 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:37:43,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:37:43,244 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:37:43,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:37:43,383 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:37:43,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:37:43,519 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:37:43,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:37:43,636 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:37:43,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:37:43,768 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:37:43,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:37:43,911 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:37:43,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:37:44,022 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:37:44,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:37:44,129 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:37:44,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:37:44,220 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:37:44,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:37:44,310 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:37:44,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:37:44,392 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:37:44,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:37:44,475 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:37:44,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:37:44,557 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:37:44,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:37:44,643 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:37:44,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:37:44,721 INFO L134 CoverageAnalysis]: Checked inductivity of 902 backedges. 0 proven. 407 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2023-02-15 21:37:44,721 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 21:37:44,721 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [871505419] [2023-02-15 21:37:44,721 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [871505419] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 21:37:44,721 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [679190029] [2023-02-15 21:37:44,721 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-15 21:37:44,722 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 21:37:44,722 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 21:37:44,723 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 21:37:44,724 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-02-15 21:37:44,952 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2023-02-15 21:37:44,952 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 21:37:44,955 WARN L261 TraceCheckSpWp]: Trace formula consists of 396 conjuncts, 200 conjunts are in the unsatisfiable core [2023-02-15 21:37:44,958 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 21:37:45,550 INFO L134 CoverageAnalysis]: Checked inductivity of 902 backedges. 0 proven. 385 refuted. 0 times theorem prover too weak. 517 trivial. 0 not checked. [2023-02-15 21:37:45,550 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 21:37:52,993 INFO L134 CoverageAnalysis]: Checked inductivity of 902 backedges. 0 proven. 770 refuted. 0 times theorem prover too weak. 132 trivial. 0 not checked. [2023-02-15 21:37:52,993 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [679190029] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 21:37:52,993 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 21:37:52,993 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 54, 75] total 84 [2023-02-15 21:37:52,994 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [90077006] [2023-02-15 21:37:52,994 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 21:37:52,994 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 84 states [2023-02-15 21:37:52,994 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 21:37:52,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2023-02-15 21:37:52,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=291, Invalid=6681, Unknown=0, NotChecked=0, Total=6972 [2023-02-15 21:37:52,995 INFO L87 Difference]: Start difference. First operand 90 states and 92 transitions. Second operand has 84 states, 83 states have (on average 1.6987951807228916) internal successors, (141), 57 states have internal predecessors, (141), 27 states have call successors, (27), 1 states have call predecessors, (27), 25 states have return successors, (49), 27 states have call predecessors, (49), 27 states have call successors, (49) [2023-02-15 21:37:55,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 21:37:55,451 INFO L93 Difference]: Finished difference Result 165 states and 167 transitions. [2023-02-15 21:37:55,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2023-02-15 21:37:55,452 INFO L78 Accepts]: Start accepts. Automaton has has 84 states, 83 states have (on average 1.6987951807228916) internal successors, (141), 57 states have internal predecessors, (141), 27 states have call successors, (27), 1 states have call predecessors, (27), 25 states have return successors, (49), 27 states have call predecessors, (49), 27 states have call successors, (49) Word has length 173 [2023-02-15 21:37:55,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 21:37:55,453 INFO L225 Difference]: With dead ends: 165 [2023-02-15 21:37:55,453 INFO L226 Difference]: Without dead ends: 161 [2023-02-15 21:37:55,455 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 494 GetRequests, 310 SyntacticMatches, 53 SemanticMatches, 131 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2266 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=1123, Invalid=16433, Unknown=0, NotChecked=0, Total=17556 [2023-02-15 21:37:55,455 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 12 mSDsluCounter, 1610 mSDsCounter, 0 mSdLazyCounter, 3282 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 1646 SdHoareTripleChecker+Invalid, 3283 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 3282 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-02-15 21:37:55,455 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 1646 Invalid, 3283 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 3282 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-02-15 21:37:55,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2023-02-15 21:37:55,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 93. [2023-02-15 21:37:55,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 63 states have (on average 1.0317460317460319) internal successors, (65), 64 states have internal predecessors, (65), 3 states have call successors, (3), 2 states have call predecessors, (3), 26 states have return successors, (27), 26 states have call predecessors, (27), 3 states have call successors, (27) [2023-02-15 21:37:55,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 95 transitions. [2023-02-15 21:37:55,458 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 95 transitions. Word has length 173 [2023-02-15 21:37:55,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 21:37:55,458 INFO L495 AbstractCegarLoop]: Abstraction has 93 states and 95 transitions. [2023-02-15 21:37:55,458 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 84 states, 83 states have (on average 1.6987951807228916) internal successors, (141), 57 states have internal predecessors, (141), 27 states have call successors, (27), 1 states have call predecessors, (27), 25 states have return successors, (49), 27 states have call predecessors, (49), 27 states have call successors, (49) [2023-02-15 21:37:55,458 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 95 transitions. [2023-02-15 21:37:55,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2023-02-15 21:37:55,459 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 21:37:55,459 INFO L195 NwaCegarLoop]: trace histogram [13, 13, 13, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 21:37:55,485 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2023-02-15 21:37:55,665 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2023-02-15 21:37:55,665 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 21:37:55,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 21:37:55,665 INFO L85 PathProgramCache]: Analyzing trace with hash -1923299322, now seen corresponding path program 12 times [2023-02-15 21:37:55,665 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 21:37:55,665 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [669117816] [2023-02-15 21:37:55,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 21:37:55,665 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 21:37:55,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:37:56,067 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:37:56,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:37:56,360 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:37:56,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:37:56,754 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:37:56,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:37:57,023 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:37:57,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:37:57,251 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:37:57,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:37:57,461 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:37:57,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:37:57,674 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:37:57,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:37:57,875 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:37:57,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:37:58,044 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:37:58,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:37:58,210 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:37:58,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:37:58,371 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:37:58,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:37:58,532 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:37:58,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:37:58,664 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:37:58,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:37:58,792 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:37:58,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:37:58,927 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:37:58,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:37:59,058 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:37:59,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:37:59,172 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:37:59,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:37:59,291 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:37:59,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:37:59,391 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:37:59,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:37:59,486 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:37:59,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:37:59,576 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:37:59,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:37:59,667 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:37:59,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:37:59,757 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:37:59,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:37:59,849 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:37:59,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:37:59,940 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:37:59,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:38:00,039 INFO L134 CoverageAnalysis]: Checked inductivity of 984 backedges. 0 proven. 444 refuted. 0 times theorem prover too weak. 540 trivial. 0 not checked. [2023-02-15 21:38:00,040 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 21:38:00,040 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [669117816] [2023-02-15 21:38:00,040 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [669117816] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 21:38:00,040 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2085421487] [2023-02-15 21:38:00,040 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-02-15 21:38:00,040 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 21:38:00,040 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 21:38:00,041 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 21:38:00,042 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-02-15 21:38:00,335 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2023-02-15 21:38:00,336 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 21:38:00,339 WARN L261 TraceCheckSpWp]: Trace formula consists of 411 conjuncts, 208 conjunts are in the unsatisfiable core [2023-02-15 21:38:00,341 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 21:38:00,969 INFO L134 CoverageAnalysis]: Checked inductivity of 984 backedges. 0 proven. 420 refuted. 0 times theorem prover too weak. 564 trivial. 0 not checked. [2023-02-15 21:38:00,970 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 21:38:09,157 INFO L134 CoverageAnalysis]: Checked inductivity of 984 backedges. 0 proven. 840 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2023-02-15 21:38:09,157 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2085421487] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 21:38:09,157 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 21:38:09,157 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 56, 78] total 88 [2023-02-15 21:38:09,157 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [90883555] [2023-02-15 21:38:09,158 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 21:38:09,158 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 88 states [2023-02-15 21:38:09,158 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 21:38:09,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2023-02-15 21:38:09,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=308, Invalid=7348, Unknown=0, NotChecked=0, Total=7656 [2023-02-15 21:38:09,159 INFO L87 Difference]: Start difference. First operand 93 states and 95 transitions. Second operand has 88 states, 86 states have (on average 1.7093023255813953) internal successors, (147), 60 states have internal predecessors, (147), 29 states have call successors, (29), 1 states have call predecessors, (29), 26 states have return successors, (51), 28 states have call predecessors, (51), 29 states have call successors, (51) [2023-02-15 21:38:11,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 21:38:11,695 INFO L93 Difference]: Finished difference Result 171 states and 173 transitions. [2023-02-15 21:38:11,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2023-02-15 21:38:11,695 INFO L78 Accepts]: Start accepts. Automaton has has 88 states, 86 states have (on average 1.7093023255813953) internal successors, (147), 60 states have internal predecessors, (147), 29 states have call successors, (29), 1 states have call predecessors, (29), 26 states have return successors, (51), 28 states have call predecessors, (51), 29 states have call successors, (51) Word has length 180 [2023-02-15 21:38:11,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 21:38:11,696 INFO L225 Difference]: With dead ends: 171 [2023-02-15 21:38:11,696 INFO L226 Difference]: Without dead ends: 167 [2023-02-15 21:38:11,697 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 513 GetRequests, 321 SyntacticMatches, 56 SemanticMatches, 136 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2744 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=1173, Invalid=17733, Unknown=0, NotChecked=0, Total=18906 [2023-02-15 21:38:11,698 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 87 mSDsluCounter, 1422 mSDsCounter, 0 mSdLazyCounter, 2883 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 1459 SdHoareTripleChecker+Invalid, 2937 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 2883 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-02-15 21:38:11,698 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [103 Valid, 1459 Invalid, 2937 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 2883 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-02-15 21:38:11,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2023-02-15 21:38:11,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 96. [2023-02-15 21:38:11,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 65 states have (on average 1.0307692307692307) internal successors, (67), 66 states have internal predecessors, (67), 3 states have call successors, (3), 2 states have call predecessors, (3), 27 states have return successors, (28), 27 states have call predecessors, (28), 3 states have call successors, (28) [2023-02-15 21:38:11,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 98 transitions. [2023-02-15 21:38:11,701 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 98 transitions. Word has length 180 [2023-02-15 21:38:11,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 21:38:11,701 INFO L495 AbstractCegarLoop]: Abstraction has 96 states and 98 transitions. [2023-02-15 21:38:11,701 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 88 states, 86 states have (on average 1.7093023255813953) internal successors, (147), 60 states have internal predecessors, (147), 29 states have call successors, (29), 1 states have call predecessors, (29), 26 states have return successors, (51), 28 states have call predecessors, (51), 29 states have call successors, (51) [2023-02-15 21:38:11,701 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 98 transitions. [2023-02-15 21:38:11,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2023-02-15 21:38:11,702 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 21:38:11,702 INFO L195 NwaCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 21:38:11,712 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2023-02-15 21:38:11,910 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 21:38:11,911 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 21:38:11,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 21:38:11,911 INFO L85 PathProgramCache]: Analyzing trace with hash 853137374, now seen corresponding path program 12 times [2023-02-15 21:38:11,911 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 21:38:11,911 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1740385642] [2023-02-15 21:38:11,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 21:38:11,911 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 21:38:11,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:38:12,252 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:38:12,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:38:12,575 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:38:12,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:38:12,880 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:38:12,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:38:13,143 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:38:13,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:38:13,389 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:38:13,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:38:13,608 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:38:13,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:38:13,827 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:38:13,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:38:14,022 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:38:14,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:38:14,234 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:38:14,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:38:14,406 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:38:14,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:38:14,587 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:38:14,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:38:14,745 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:38:14,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:38:14,902 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:38:14,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:38:15,066 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:38:15,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:38:15,212 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:38:15,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:38:15,335 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:38:15,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:38:15,451 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:38:15,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:38:15,576 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:38:15,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:38:15,692 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:38:15,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:38:15,802 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:38:15,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:38:15,895 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:38:15,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:38:15,991 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:38:15,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:38:16,085 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:38:16,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:38:16,191 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:38:16,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:38:16,287 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:38:16,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:38:16,381 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:38:16,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:38:16,468 INFO L134 CoverageAnalysis]: Checked inductivity of 1068 backedges. 0 proven. 480 refuted. 0 times theorem prover too weak. 588 trivial. 0 not checked. [2023-02-15 21:38:16,468 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 21:38:16,468 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1740385642] [2023-02-15 21:38:16,468 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1740385642] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 21:38:16,468 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2093911649] [2023-02-15 21:38:16,468 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-02-15 21:38:16,468 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 21:38:16,468 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 21:38:16,469 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 21:38:16,473 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-02-15 21:38:16,788 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2023-02-15 21:38:16,788 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 21:38:16,791 INFO L263 TraceCheckSpWp]: Trace formula consists of 426 conjuncts, 164 conjunts are in the unsatisfiable core [2023-02-15 21:38:16,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 21:38:19,728 INFO L134 CoverageAnalysis]: Checked inductivity of 1068 backedges. 0 proven. 456 refuted. 0 times theorem prover too weak. 612 trivial. 0 not checked. [2023-02-15 21:38:19,728 INFO L328 TraceCheckSpWp]: Computing backward predicates...