./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/recursive/Addition03-1.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/Addition03-1.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 2b4726bd085117d6d28f7ec87f442bbec9d0d87c17bc39b8147695c8c5a6ec7b --- Real Ultimate output --- This is Ultimate 0.2.2-?-e8d5503-m [2023-02-15 21:35:23,250 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-02-15 21:35:23,252 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-02-15 21:35:23,270 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-02-15 21:35:23,270 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-02-15 21:35:23,271 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-02-15 21:35:23,272 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-02-15 21:35:23,273 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-02-15 21:35:23,274 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-02-15 21:35:23,275 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-02-15 21:35:23,275 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-02-15 21:35:23,277 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-02-15 21:35:23,278 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-02-15 21:35:23,280 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-02-15 21:35:23,282 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-02-15 21:35:23,283 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-02-15 21:35:23,284 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-02-15 21:35:23,286 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-02-15 21:35:23,287 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-02-15 21:35:23,288 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-02-15 21:35:23,288 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-02-15 21:35:23,295 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-02-15 21:35:23,296 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-02-15 21:35:23,297 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-02-15 21:35:23,299 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-02-15 21:35:23,302 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-02-15 21:35:23,302 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-02-15 21:35:23,303 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-02-15 21:35:23,303 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-02-15 21:35:23,304 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-02-15 21:35:23,305 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-02-15 21:35:23,305 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-02-15 21:35:23,306 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-02-15 21:35:23,307 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-02-15 21:35:23,308 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-02-15 21:35:23,308 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-02-15 21:35:23,309 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-02-15 21:35:23,309 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-02-15 21:35:23,309 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-02-15 21:35:23,310 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-02-15 21:35:23,311 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-02-15 21:35:23,312 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-02-15 21:35:23,325 INFO L113 SettingsManager]: Loading preferences was successful [2023-02-15 21:35:23,325 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-02-15 21:35:23,325 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-02-15 21:35:23,325 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-02-15 21:35:23,329 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-02-15 21:35:23,330 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-02-15 21:35:23,330 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-02-15 21:35:23,330 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-02-15 21:35:23,330 INFO L138 SettingsManager]: * Use SBE=true [2023-02-15 21:35:23,330 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-02-15 21:35:23,330 INFO L138 SettingsManager]: * sizeof long=4 [2023-02-15 21:35:23,330 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-02-15 21:35:23,330 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-02-15 21:35:23,330 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-02-15 21:35:23,331 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-02-15 21:35:23,331 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-02-15 21:35:23,331 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-02-15 21:35:23,331 INFO L138 SettingsManager]: * sizeof long double=12 [2023-02-15 21:35:23,331 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-02-15 21:35:23,331 INFO L138 SettingsManager]: * Use constant arrays=true [2023-02-15 21:35:23,331 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-02-15 21:35:23,331 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-02-15 21:35:23,331 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-02-15 21:35:23,331 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-02-15 21:35:23,331 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-15 21:35:23,331 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-02-15 21:35:23,332 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-02-15 21:35:23,332 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-02-15 21:35:23,332 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-02-15 21:35:23,332 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-02-15 21:35:23,332 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-02-15 21:35:23,332 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-02-15 21:35:23,332 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-02-15 21:35:23,332 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-02-15 21:35:23,332 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-02-15 21:35:23,332 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2b4726bd085117d6d28f7ec87f442bbec9d0d87c17bc39b8147695c8c5a6ec7b [2023-02-15 21:35:23,510 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-02-15 21:35:23,531 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-02-15 21:35:23,533 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-02-15 21:35:23,534 INFO L271 PluginConnector]: Initializing CDTParser... [2023-02-15 21:35:23,534 INFO L275 PluginConnector]: CDTParser initialized [2023-02-15 21:35:23,535 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/recursive/Addition03-1.c [2023-02-15 21:35:24,509 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-02-15 21:35:24,656 INFO L351 CDTParser]: Found 1 translation units. [2023-02-15 21:35:24,656 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursive/Addition03-1.c [2023-02-15 21:35:24,665 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d5051a38e/0feb308b62ab4bad9cf7a7ab54ee1fe2/FLAGaf0bb973d [2023-02-15 21:35:24,680 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d5051a38e/0feb308b62ab4bad9cf7a7ab54ee1fe2 [2023-02-15 21:35:24,682 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-02-15 21:35:24,683 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-02-15 21:35:24,684 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-02-15 21:35:24,684 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-02-15 21:35:24,686 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-02-15 21:35:24,687 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.02 09:35:24" (1/1) ... [2023-02-15 21:35:24,689 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@65adf3ed and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 09:35:24, skipping insertion in model container [2023-02-15 21:35:24,689 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.02 09:35:24" (1/1) ... [2023-02-15 21:35:24,694 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-02-15 21:35:24,705 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-02-15 21:35:24,803 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/Addition03-1.c[840,853] [2023-02-15 21:35:24,805 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-15 21:35:24,811 INFO L203 MainTranslator]: Completed pre-run [2023-02-15 21:35:24,820 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/Addition03-1.c[840,853] [2023-02-15 21:35:24,821 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-15 21:35:24,829 INFO L208 MainTranslator]: Completed translation [2023-02-15 21:35:24,829 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 09:35:24 WrapperNode [2023-02-15 21:35:24,829 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-02-15 21:35:24,830 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-02-15 21:35:24,830 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-02-15 21:35:24,830 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-02-15 21:35:24,835 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 09:35:24" (1/1) ... [2023-02-15 21:35:24,838 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 09:35:24" (1/1) ... [2023-02-15 21:35:24,848 INFO L138 Inliner]: procedures = 13, calls = 10, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 26 [2023-02-15 21:35:24,848 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-02-15 21:35:24,849 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-02-15 21:35:24,849 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-02-15 21:35:24,849 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-02-15 21:35:24,854 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 09:35:24" (1/1) ... [2023-02-15 21:35:24,855 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 09:35:24" (1/1) ... [2023-02-15 21:35:24,855 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 09:35:24" (1/1) ... [2023-02-15 21:35:24,856 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 09:35:24" (1/1) ... [2023-02-15 21:35:24,857 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 09:35:24" (1/1) ... [2023-02-15 21:35:24,859 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 09:35:24" (1/1) ... [2023-02-15 21:35:24,859 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 09:35:24" (1/1) ... [2023-02-15 21:35:24,860 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 09:35:24" (1/1) ... [2023-02-15 21:35:24,861 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-02-15 21:35:24,862 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-02-15 21:35:24,862 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-02-15 21:35:24,862 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-02-15 21:35:24,863 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 09:35:24" (1/1) ... [2023-02-15 21:35:24,867 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-15 21:35:24,875 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 21:35:24,885 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 21:35:24,887 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 21:35:24,911 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-02-15 21:35:24,911 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-02-15 21:35:24,912 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-02-15 21:35:24,912 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-02-15 21:35:24,912 INFO L130 BoogieDeclarations]: Found specification of procedure addition [2023-02-15 21:35:24,912 INFO L138 BoogieDeclarations]: Found implementation of procedure addition [2023-02-15 21:35:24,950 INFO L235 CfgBuilder]: Building ICFG [2023-02-15 21:35:24,951 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2023-02-15 21:35:25,020 INFO L276 CfgBuilder]: Performing block encoding [2023-02-15 21:35:25,024 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-02-15 21:35:25,024 INFO L300 CfgBuilder]: Removed 0 assume(true) statements. [2023-02-15 21:35:25,025 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.02 09:35:25 BoogieIcfgContainer [2023-02-15 21:35:25,027 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-02-15 21:35:25,028 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-02-15 21:35:25,028 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-02-15 21:35:25,030 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-02-15 21:35:25,030 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.02 09:35:24" (1/3) ... [2023-02-15 21:35:25,031 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@48217723 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.02 09:35:25, skipping insertion in model container [2023-02-15 21:35:25,031 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 09:35:24" (2/3) ... [2023-02-15 21:35:25,031 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@48217723 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.02 09:35:25, skipping insertion in model container [2023-02-15 21:35:25,032 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.02 09:35:25" (3/3) ... [2023-02-15 21:35:25,033 INFO L112 eAbstractionObserver]: Analyzing ICFG Addition03-1.c [2023-02-15 21:35:25,044 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-02-15 21:35:25,044 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-02-15 21:35:25,103 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-02-15 21:35:25,112 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;@7b4044b0, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-02-15 21:35:25,112 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-02-15 21:35:25,115 INFO L276 IsEmpty]: Start isEmpty. Operand has 20 states, 14 states have (on average 1.3571428571428572) internal successors, (19), 15 states have internal predecessors, (19), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-15 21:35:25,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-02-15 21:35:25,128 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 21:35:25,128 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 21:35:25,129 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 21:35:25,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 21:35:25,133 INFO L85 PathProgramCache]: Analyzing trace with hash -100249854, now seen corresponding path program 1 times [2023-02-15 21:35:25,140 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 21:35:25,140 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1931696827] [2023-02-15 21:35:25,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 21:35:25,141 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 21:35:25,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:35:25,260 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 21:35:25,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:35:25,307 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 21:35:25,308 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 21:35:25,308 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1931696827] [2023-02-15 21:35:25,309 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1931696827] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 21:35:25,309 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 21:35:25,309 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-15 21:35:25,310 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [133960104] [2023-02-15 21:35:25,311 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 21:35:25,313 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-15 21:35:25,313 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 21:35:25,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-15 21:35:25,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-02-15 21:35:25,335 INFO L87 Difference]: Start difference. First operand has 20 states, 14 states have (on average 1.3571428571428572) internal successors, (19), 15 states have internal predecessors, (19), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 5 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 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 21:35:25,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 21:35:25,386 INFO L93 Difference]: Finished difference Result 32 states and 38 transitions. [2023-02-15 21:35:25,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-02-15 21:35:25,388 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 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 10 [2023-02-15 21:35:25,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 21:35:25,394 INFO L225 Difference]: With dead ends: 32 [2023-02-15 21:35:25,395 INFO L226 Difference]: Without dead ends: 19 [2023-02-15 21:35:25,401 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-02-15 21:35:25,406 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 13 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 21:35:25,407 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 40 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 21:35:25,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2023-02-15 21:35:25,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2023-02-15 21:35:25,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 14 states have internal predecessors, (16), 3 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2023-02-15 21:35:25,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 24 transitions. [2023-02-15 21:35:25,430 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 24 transitions. Word has length 10 [2023-02-15 21:35:25,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 21:35:25,430 INFO L495 AbstractCegarLoop]: Abstraction has 19 states and 24 transitions. [2023-02-15 21:35:25,431 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 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 21:35:25,431 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 24 transitions. [2023-02-15 21:35:25,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-02-15 21:35:25,432 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 21:35:25,432 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 21:35:25,432 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-02-15 21:35:25,432 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 21:35:25,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 21:35:25,433 INFO L85 PathProgramCache]: Analyzing trace with hash -2083914533, now seen corresponding path program 1 times [2023-02-15 21:35:25,433 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 21:35:25,433 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [403230463] [2023-02-15 21:35:25,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 21:35:25,433 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 21:35:25,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:35:25,458 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 21:35:25,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:35:25,502 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 21:35:25,503 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 21:35:25,503 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [403230463] [2023-02-15 21:35:25,503 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [403230463] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 21:35:25,503 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 21:35:25,503 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-15 21:35:25,503 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [442743813] [2023-02-15 21:35:25,504 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 21:35:25,504 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-15 21:35:25,505 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 21:35:25,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-15 21:35:25,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-02-15 21:35:25,505 INFO L87 Difference]: Start difference. First operand 19 states and 24 transitions. Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 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 21:35:25,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 21:35:25,527 INFO L93 Difference]: Finished difference Result 29 states and 37 transitions. [2023-02-15 21:35:25,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-15 21:35:25,527 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 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 21:35:25,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 21:35:25,528 INFO L225 Difference]: With dead ends: 29 [2023-02-15 21:35:25,528 INFO L226 Difference]: Without dead ends: 21 [2023-02-15 21:35:25,529 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-02-15 21:35:25,529 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 8 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 21:35:25,530 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 31 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 21:35:25,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2023-02-15 21:35:25,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 19. [2023-02-15 21:35:25,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 14 states have internal predecessors, (15), 3 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2023-02-15 21:35:25,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 23 transitions. [2023-02-15 21:35:25,535 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 23 transitions. Word has length 12 [2023-02-15 21:35:25,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 21:35:25,535 INFO L495 AbstractCegarLoop]: Abstraction has 19 states and 23 transitions. [2023-02-15 21:35:25,535 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 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 21:35:25,535 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 23 transitions. [2023-02-15 21:35:25,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-02-15 21:35:25,536 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 21:35:25,536 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 21:35:25,536 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-02-15 21:35:25,537 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 21:35:25,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 21:35:25,537 INFO L85 PathProgramCache]: Analyzing trace with hash 1402250658, now seen corresponding path program 1 times [2023-02-15 21:35:25,537 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 21:35:25,538 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [398230858] [2023-02-15 21:35:25,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 21:35:25,538 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 21:35:25,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:35:25,592 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 21:35:25,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:35:25,647 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:35:25,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:35:25,677 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-15 21:35:25,677 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 21:35:25,677 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [398230858] [2023-02-15 21:35:25,678 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [398230858] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 21:35:25,678 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1564758414] [2023-02-15 21:35:25,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 21:35:25,678 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 21:35:25,678 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 21:35:25,681 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 21:35:25,696 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 21:35:25,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:35:25,743 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 6 conjunts are in the unsatisfiable core [2023-02-15 21:35:25,747 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 21:35:25,818 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-15 21:35:25,819 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 21:35:25,994 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-15 21:35:25,995 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1564758414] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 21:35:25,995 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 21:35:25,995 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 7] total 13 [2023-02-15 21:35:25,995 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1428010304] [2023-02-15 21:35:25,995 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 21:35:25,996 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-02-15 21:35:25,996 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 21:35:25,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-02-15 21:35:25,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2023-02-15 21:35:25,997 INFO L87 Difference]: Start difference. First operand 19 states and 23 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 4 states have call successors, (4), 1 states have call predecessors, (4), 4 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2023-02-15 21:35:26,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 21:35:26,144 INFO L93 Difference]: Finished difference Result 54 states and 75 transitions. [2023-02-15 21:35:26,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-02-15 21:35:26,145 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 4 states have call successors, (4), 1 states have call predecessors, (4), 4 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) Word has length 17 [2023-02-15 21:35:26,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 21:35:26,147 INFO L225 Difference]: With dead ends: 54 [2023-02-15 21:35:26,147 INFO L226 Difference]: Without dead ends: 34 [2023-02-15 21:35:26,149 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=89, Invalid=183, Unknown=0, NotChecked=0, Total=272 [2023-02-15 21:35:26,150 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 36 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 21:35:26,152 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 40 Invalid, 120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 21:35:26,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2023-02-15 21:35:26,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 32. [2023-02-15 21:35:26,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 23 states have (on average 1.2173913043478262) internal successors, (28), 23 states have internal predecessors, (28), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2023-02-15 21:35:26,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 40 transitions. [2023-02-15 21:35:26,163 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 40 transitions. Word has length 17 [2023-02-15 21:35:26,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 21:35:26,164 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 40 transitions. [2023-02-15 21:35:26,164 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 4 states have call successors, (4), 1 states have call predecessors, (4), 4 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2023-02-15 21:35:26,165 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 40 transitions. [2023-02-15 21:35:26,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2023-02-15 21:35:26,168 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 21:35:26,168 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 21:35:26,177 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 21:35:26,377 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 21:35:26,377 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 21:35:26,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 21:35:26,378 INFO L85 PathProgramCache]: Analyzing trace with hash -1901242716, now seen corresponding path program 2 times [2023-02-15 21:35:26,378 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 21:35:26,378 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [719779076] [2023-02-15 21:35:26,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 21:35:26,378 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 21:35:26,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:35:26,454 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 21:35:26,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:35:26,502 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:35:26,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:35:26,527 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:35:26,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:35:26,554 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:35:26,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:35:26,586 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-02-15 21:35:26,586 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 21:35:26,586 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [719779076] [2023-02-15 21:35:26,587 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [719779076] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 21:35:26,589 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1776410329] [2023-02-15 21:35:26,589 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-15 21:35:26,589 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 21:35:26,590 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 21:35:26,591 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 21:35:26,593 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 21:35:26,637 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-15 21:35:26,637 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 21:35:26,652 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 10 conjunts are in the unsatisfiable core [2023-02-15 21:35:26,654 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 21:35:26,712 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-02-15 21:35:26,712 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 21:35:27,112 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-02-15 21:35:27,112 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1776410329] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 21:35:27,112 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 21:35:27,112 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 11] total 17 [2023-02-15 21:35:27,113 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [424602105] [2023-02-15 21:35:27,113 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 21:35:27,113 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-02-15 21:35:27,113 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 21:35:27,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-02-15 21:35:27,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=195, Unknown=0, NotChecked=0, Total=272 [2023-02-15 21:35:27,114 INFO L87 Difference]: Start difference. First operand 32 states and 40 transitions. Second operand has 17 states, 17 states have (on average 2.176470588235294) internal successors, (37), 17 states have internal predecessors, (37), 6 states have call successors, (6), 1 states have call predecessors, (6), 6 states have return successors, (11), 6 states have call predecessors, (11), 6 states have call successors, (11) [2023-02-15 21:35:27,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 21:35:27,227 INFO L93 Difference]: Finished difference Result 46 states and 57 transitions. [2023-02-15 21:35:27,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-02-15 21:35:27,227 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.176470588235294) internal successors, (37), 17 states have internal predecessors, (37), 6 states have call successors, (6), 1 states have call predecessors, (6), 6 states have return successors, (11), 6 states have call predecessors, (11), 6 states have call successors, (11) Word has length 31 [2023-02-15 21:35:27,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 21:35:27,228 INFO L225 Difference]: With dead ends: 46 [2023-02-15 21:35:27,229 INFO L226 Difference]: Without dead ends: 40 [2023-02-15 21:35:27,229 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 55 SyntacticMatches, 5 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=167, Invalid=339, Unknown=0, NotChecked=0, Total=506 [2023-02-15 21:35:27,230 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 60 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 159 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 21:35:27,230 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [66 Valid, 66 Invalid, 159 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 21:35:27,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2023-02-15 21:35:27,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 38. [2023-02-15 21:35:27,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 27 states have (on average 1.1851851851851851) internal successors, (32), 27 states have internal predecessors, (32), 4 states have call successors, (4), 3 states have call predecessors, (4), 6 states have return successors, (10), 7 states have call predecessors, (10), 4 states have call successors, (10) [2023-02-15 21:35:27,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 46 transitions. [2023-02-15 21:35:27,235 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 46 transitions. Word has length 31 [2023-02-15 21:35:27,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 21:35:27,235 INFO L495 AbstractCegarLoop]: Abstraction has 38 states and 46 transitions. [2023-02-15 21:35:27,236 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.176470588235294) internal successors, (37), 17 states have internal predecessors, (37), 6 states have call successors, (6), 1 states have call predecessors, (6), 6 states have return successors, (11), 6 states have call predecessors, (11), 6 states have call successors, (11) [2023-02-15 21:35:27,236 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 46 transitions. [2023-02-15 21:35:27,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2023-02-15 21:35:27,237 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 21:35:27,237 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 21:35:27,245 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-02-15 21:35:27,441 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,SelfDestructingSolverStorable3 [2023-02-15 21:35:27,442 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 21:35:27,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 21:35:27,442 INFO L85 PathProgramCache]: Analyzing trace with hash -2146751834, now seen corresponding path program 3 times [2023-02-15 21:35:27,442 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 21:35:27,443 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1586140739] [2023-02-15 21:35:27,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 21:35:27,443 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 21:35:27,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:35:27,523 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 21:35:27,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:35:27,599 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:35:27,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:35:27,666 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:35:27,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:35:27,714 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:35:27,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:35:27,736 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:35:27,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:35:27,759 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:35:27,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:35:27,779 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-02-15 21:35:27,781 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 21:35:27,783 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1586140739] [2023-02-15 21:35:27,783 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1586140739] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 21:35:27,783 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1703801047] [2023-02-15 21:35:27,783 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-15 21:35:27,784 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 21:35:27,784 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 21:35:27,785 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 21:35:27,801 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 21:35:27,834 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2023-02-15 21:35:27,835 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 21:35:27,836 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 14 conjunts are in the unsatisfiable core [2023-02-15 21:35:27,837 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 21:35:27,895 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2023-02-15 21:35:27,895 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 21:35:28,701 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 75 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-02-15 21:35:28,702 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1703801047] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 21:35:28,702 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 21:35:28,702 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 15] total 21 [2023-02-15 21:35:28,702 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2033656788] [2023-02-15 21:35:28,702 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 21:35:28,703 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-02-15 21:35:28,703 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 21:35:28,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-02-15 21:35:28,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=303, Unknown=0, NotChecked=0, Total=420 [2023-02-15 21:35:28,704 INFO L87 Difference]: Start difference. First operand 38 states and 46 transitions. Second operand has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 21 states have internal predecessors, (47), 8 states have call successors, (8), 1 states have call predecessors, (8), 8 states have return successors, (17), 8 states have call predecessors, (17), 8 states have call successors, (17) [2023-02-15 21:35:28,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 21:35:28,817 INFO L93 Difference]: Finished difference Result 52 states and 63 transitions. [2023-02-15 21:35:28,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-02-15 21:35:28,818 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 21 states have internal predecessors, (47), 8 states have call successors, (8), 1 states have call predecessors, (8), 8 states have return successors, (17), 8 states have call predecessors, (17), 8 states have call successors, (17) Word has length 45 [2023-02-15 21:35:28,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 21:35:28,822 INFO L225 Difference]: With dead ends: 52 [2023-02-15 21:35:28,823 INFO L226 Difference]: Without dead ends: 46 [2023-02-15 21:35:28,823 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 81 SyntacticMatches, 9 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 238 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=269, Invalid=543, Unknown=0, NotChecked=0, Total=812 [2023-02-15 21:35:28,824 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 58 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 112 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 158 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 21:35:28,824 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [66 Valid, 68 Invalid, 158 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 112 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 21:35:28,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2023-02-15 21:35:28,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 44. [2023-02-15 21:35:28,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 31 states have (on average 1.1612903225806452) internal successors, (36), 31 states have internal predecessors, (36), 4 states have call successors, (4), 3 states have call predecessors, (4), 8 states have return successors, (12), 9 states have call predecessors, (12), 4 states have call successors, (12) [2023-02-15 21:35:28,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 52 transitions. [2023-02-15 21:35:28,836 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 52 transitions. Word has length 45 [2023-02-15 21:35:28,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 21:35:28,837 INFO L495 AbstractCegarLoop]: Abstraction has 44 states and 52 transitions. [2023-02-15 21:35:28,837 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 21 states have internal predecessors, (47), 8 states have call successors, (8), 1 states have call predecessors, (8), 8 states have return successors, (17), 8 states have call predecessors, (17), 8 states have call successors, (17) [2023-02-15 21:35:28,837 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 52 transitions. [2023-02-15 21:35:28,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2023-02-15 21:35:28,840 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 21:35:28,841 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 21:35:28,849 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-02-15 21:35:29,045 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 21:35:29,046 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 21:35:29,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 21:35:29,046 INFO L85 PathProgramCache]: Analyzing trace with hash -489684568, now seen corresponding path program 4 times [2023-02-15 21:35:29,046 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 21:35:29,047 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1845868331] [2023-02-15 21:35:29,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 21:35:29,047 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 21:35:29,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:35:29,136 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 21:35:29,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:35:29,230 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:35:29,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:35:29,276 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:35:29,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:35:29,321 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:35:29,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:35:29,349 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:35:29,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:35:29,373 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:35:29,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:35:29,401 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:35:29,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:35:29,416 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:35:29,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:35:29,446 INFO L134 CoverageAnalysis]: Checked inductivity of 175 backedges. 0 proven. 84 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2023-02-15 21:35:29,447 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 21:35:29,447 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1845868331] [2023-02-15 21:35:29,447 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1845868331] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 21:35:29,447 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1927548463] [2023-02-15 21:35:29,447 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-15 21:35:29,447 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 21:35:29,447 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 21:35:29,448 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 21:35:29,484 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 21:35:29,517 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-15 21:35:29,517 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 21:35:29,518 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 18 conjunts are in the unsatisfiable core [2023-02-15 21:35:29,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 21:35:29,582 INFO L134 CoverageAnalysis]: Checked inductivity of 175 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2023-02-15 21:35:29,582 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 21:35:31,104 INFO L134 CoverageAnalysis]: Checked inductivity of 175 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-02-15 21:35:31,105 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1927548463] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 21:35:31,105 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 21:35:31,105 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 19] total 25 [2023-02-15 21:35:31,105 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2021103662] [2023-02-15 21:35:31,105 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 21:35:31,106 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-02-15 21:35:31,106 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 21:35:31,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-02-15 21:35:31,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=435, Unknown=0, NotChecked=0, Total=600 [2023-02-15 21:35:31,107 INFO L87 Difference]: Start difference. First operand 44 states and 52 transitions. Second operand has 25 states, 25 states have (on average 2.28) internal successors, (57), 25 states have internal predecessors, (57), 10 states have call successors, (10), 1 states have call predecessors, (10), 10 states have return successors, (23), 10 states have call predecessors, (23), 10 states have call successors, (23) [2023-02-15 21:35:31,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 21:35:31,226 INFO L93 Difference]: Finished difference Result 58 states and 69 transitions. [2023-02-15 21:35:31,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-02-15 21:35:31,226 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.28) internal successors, (57), 25 states have internal predecessors, (57), 10 states have call successors, (10), 1 states have call predecessors, (10), 10 states have return successors, (23), 10 states have call predecessors, (23), 10 states have call successors, (23) Word has length 59 [2023-02-15 21:35:31,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 21:35:31,227 INFO L225 Difference]: With dead ends: 58 [2023-02-15 21:35:31,227 INFO L226 Difference]: Without dead ends: 52 [2023-02-15 21:35:31,228 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 107 SyntacticMatches, 13 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 389 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=395, Invalid=795, Unknown=0, NotChecked=0, Total=1190 [2023-02-15 21:35:31,228 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 64 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 21:35:31,229 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [74 Valid, 96 Invalid, 152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 116 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 21:35:31,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2023-02-15 21:35:31,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 50. [2023-02-15 21:35:31,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 35 states have (on average 1.1428571428571428) internal successors, (40), 35 states have internal predecessors, (40), 4 states have call successors, (4), 3 states have call predecessors, (4), 10 states have return successors, (14), 11 states have call predecessors, (14), 4 states have call successors, (14) [2023-02-15 21:35:31,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 58 transitions. [2023-02-15 21:35:31,235 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 58 transitions. Word has length 59 [2023-02-15 21:35:31,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 21:35:31,236 INFO L495 AbstractCegarLoop]: Abstraction has 50 states and 58 transitions. [2023-02-15 21:35:31,236 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.28) internal successors, (57), 25 states have internal predecessors, (57), 10 states have call successors, (10), 1 states have call predecessors, (10), 10 states have return successors, (23), 10 states have call predecessors, (23), 10 states have call successors, (23) [2023-02-15 21:35:31,236 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 58 transitions. [2023-02-15 21:35:31,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2023-02-15 21:35:31,237 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 21:35:31,237 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 21:35:31,244 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 21:35:31,441 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 21:35:31,442 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 21:35:31,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 21:35:31,442 INFO L85 PathProgramCache]: Analyzing trace with hash -1199719510, now seen corresponding path program 5 times [2023-02-15 21:35:31,442 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 21:35:31,442 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1848408595] [2023-02-15 21:35:31,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 21:35:31,443 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 21:35:31,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:35:31,509 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 21:35:31,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:35:31,590 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:35:31,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:35:31,643 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:35:31,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:35:31,689 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:35:31,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:35:31,729 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:35:31,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:35:31,762 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:35:31,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:35:31,790 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:35:31,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:35:31,822 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:35:31,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:35:31,842 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:35:31,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:35:31,859 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:35:31,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:35:31,880 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 0 proven. 135 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2023-02-15 21:35:31,880 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 21:35:31,880 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1848408595] [2023-02-15 21:35:31,880 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1848408595] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 21:35:31,880 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1850864329] [2023-02-15 21:35:31,880 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-15 21:35:31,881 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 21:35:31,881 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 21:35:31,882 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 21:35:31,884 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 21:35:31,972 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2023-02-15 21:35:31,972 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 21:35:31,973 INFO L263 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 22 conjunts are in the unsatisfiable core [2023-02-15 21:35:31,975 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 21:35:32,054 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 162 trivial. 0 not checked. [2023-02-15 21:35:32,054 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 21:35:34,714 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 0 proven. 243 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-02-15 21:35:34,714 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1850864329] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 21:35:34,714 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 21:35:34,714 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 23] total 29 [2023-02-15 21:35:34,714 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1109617973] [2023-02-15 21:35:34,715 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 21:35:34,715 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-02-15 21:35:34,715 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 21:35:34,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-02-15 21:35:34,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=221, Invalid=591, Unknown=0, NotChecked=0, Total=812 [2023-02-15 21:35:34,716 INFO L87 Difference]: Start difference. First operand 50 states and 58 transitions. Second operand has 29 states, 29 states have (on average 2.310344827586207) internal successors, (67), 29 states have internal predecessors, (67), 12 states have call successors, (12), 1 states have call predecessors, (12), 12 states have return successors, (29), 12 states have call predecessors, (29), 12 states have call successors, (29) [2023-02-15 21:35:34,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 21:35:34,891 INFO L93 Difference]: Finished difference Result 64 states and 75 transitions. [2023-02-15 21:35:34,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-02-15 21:35:34,891 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.310344827586207) internal successors, (67), 29 states have internal predecessors, (67), 12 states have call successors, (12), 1 states have call predecessors, (12), 12 states have return successors, (29), 12 states have call predecessors, (29), 12 states have call successors, (29) Word has length 73 [2023-02-15 21:35:34,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 21:35:34,892 INFO L225 Difference]: With dead ends: 64 [2023-02-15 21:35:34,892 INFO L226 Difference]: Without dead ends: 58 [2023-02-15 21:35:34,893 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 133 SyntacticMatches, 17 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 576 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=545, Invalid=1095, Unknown=0, NotChecked=0, Total=1640 [2023-02-15 21:35:34,894 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 79 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 142 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 186 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 142 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 21:35:34,894 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [91 Valid, 116 Invalid, 186 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 142 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 21:35:34,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2023-02-15 21:35:34,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 56. [2023-02-15 21:35:34,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 39 states have (on average 1.1282051282051282) internal successors, (44), 39 states have internal predecessors, (44), 4 states have call successors, (4), 3 states have call predecessors, (4), 12 states have return successors, (16), 13 states have call predecessors, (16), 4 states have call successors, (16) [2023-02-15 21:35:34,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 64 transitions. [2023-02-15 21:35:34,903 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 64 transitions. Word has length 73 [2023-02-15 21:35:34,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 21:35:34,904 INFO L495 AbstractCegarLoop]: Abstraction has 56 states and 64 transitions. [2023-02-15 21:35:34,904 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.310344827586207) internal successors, (67), 29 states have internal predecessors, (67), 12 states have call successors, (12), 1 states have call predecessors, (12), 12 states have return successors, (29), 12 states have call predecessors, (29), 12 states have call successors, (29) [2023-02-15 21:35:34,904 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 64 transitions. [2023-02-15 21:35:34,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2023-02-15 21:35:34,906 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 21:35:34,906 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 21:35:34,916 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-02-15 21:35:35,110 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 21:35:35,111 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 21:35:35,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 21:35:35,111 INFO L85 PathProgramCache]: Analyzing trace with hash -1560921940, now seen corresponding path program 6 times [2023-02-15 21:35:35,111 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 21:35:35,111 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1451658336] [2023-02-15 21:35:35,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 21:35:35,112 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 21:35:35,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:35:35,219 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 21:35:35,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:35:35,325 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:35:35,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:35:35,404 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:35:35,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:35:35,468 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:35:35,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:35:35,522 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:35:35,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:35:35,573 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:35:35,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:35:35,612 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:35:35,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:35:35,643 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:35:35,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:35:35,673 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:35:35,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:35:35,696 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:35:35,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:35:35,714 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:35:35,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:35:35,731 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:35:35,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:35:35,753 INFO L134 CoverageAnalysis]: Checked inductivity of 429 backedges. 0 proven. 198 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2023-02-15 21:35:35,753 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 21:35:35,753 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1451658336] [2023-02-15 21:35:35,753 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1451658336] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 21:35:35,753 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [973305369] [2023-02-15 21:35:35,753 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-02-15 21:35:35,754 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 21:35:35,754 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 21:35:35,755 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 21:35:35,757 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 21:35:35,878 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2023-02-15 21:35:35,878 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 21:35:35,879 INFO L263 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 26 conjunts are in the unsatisfiable core [2023-02-15 21:35:35,882 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 21:35:35,985 INFO L134 CoverageAnalysis]: Checked inductivity of 429 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 242 trivial. 0 not checked. [2023-02-15 21:35:35,985 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 21:35:40,179 INFO L134 CoverageAnalysis]: Checked inductivity of 429 backedges. 0 proven. 363 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2023-02-15 21:35:40,180 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [973305369] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 21:35:40,180 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 21:35:40,180 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 27] total 33 [2023-02-15 21:35:40,181 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2071719632] [2023-02-15 21:35:40,181 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 21:35:40,182 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-02-15 21:35:40,182 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 21:35:40,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-02-15 21:35:40,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=285, Invalid=771, Unknown=0, NotChecked=0, Total=1056 [2023-02-15 21:35:40,184 INFO L87 Difference]: Start difference. First operand 56 states and 64 transitions. Second operand has 33 states, 33 states have (on average 2.3333333333333335) internal successors, (77), 33 states have internal predecessors, (77), 14 states have call successors, (14), 1 states have call predecessors, (14), 14 states have return successors, (35), 14 states have call predecessors, (35), 14 states have call successors, (35) [2023-02-15 21:35:40,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 21:35:40,364 INFO L93 Difference]: Finished difference Result 70 states and 81 transitions. [2023-02-15 21:35:40,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-02-15 21:35:40,365 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.3333333333333335) internal successors, (77), 33 states have internal predecessors, (77), 14 states have call successors, (14), 1 states have call predecessors, (14), 14 states have return successors, (35), 14 states have call predecessors, (35), 14 states have call successors, (35) Word has length 87 [2023-02-15 21:35:40,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 21:35:40,366 INFO L225 Difference]: With dead ends: 70 [2023-02-15 21:35:40,366 INFO L226 Difference]: Without dead ends: 64 [2023-02-15 21:35:40,367 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 159 SyntacticMatches, 21 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 799 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=719, Invalid=1443, Unknown=0, NotChecked=0, Total=2162 [2023-02-15 21:35:40,367 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 67 mSDsluCounter, 119 mSDsCounter, 0 mSdLazyCounter, 155 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 194 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 155 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 21:35:40,367 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [81 Valid, 132 Invalid, 194 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 155 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 21:35:40,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2023-02-15 21:35:40,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 62. [2023-02-15 21:35:40,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 43 states have (on average 1.1162790697674418) internal successors, (48), 43 states have internal predecessors, (48), 4 states have call successors, (4), 3 states have call predecessors, (4), 14 states have return successors, (18), 15 states have call predecessors, (18), 4 states have call successors, (18) [2023-02-15 21:35:40,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 70 transitions. [2023-02-15 21:35:40,371 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 70 transitions. Word has length 87 [2023-02-15 21:35:40,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 21:35:40,372 INFO L495 AbstractCegarLoop]: Abstraction has 62 states and 70 transitions. [2023-02-15 21:35:40,372 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.3333333333333335) internal successors, (77), 33 states have internal predecessors, (77), 14 states have call successors, (14), 1 states have call predecessors, (14), 14 states have return successors, (35), 14 states have call predecessors, (35), 14 states have call successors, (35) [2023-02-15 21:35:40,372 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 70 transitions. [2023-02-15 21:35:40,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2023-02-15 21:35:40,372 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 21:35:40,373 INFO L195 NwaCegarLoop]: trace histogram [14, 14, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 21:35:40,380 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 21:35:40,578 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 21:35:40,578 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 21:35:40,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 21:35:40,579 INFO L85 PathProgramCache]: Analyzing trace with hash 1048271022, now seen corresponding path program 7 times [2023-02-15 21:35:40,579 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 21:35:40,579 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [569300380] [2023-02-15 21:35:40,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 21:35:40,579 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 21:35:40,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:35:40,689 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 21:35:40,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:35:40,790 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:35:40,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:35:40,886 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:35:40,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:35:40,958 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:35:40,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:35:41,025 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:35:41,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:35:41,094 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:35:41,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:35:41,149 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:35:41,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:35:41,216 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:35:41,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:35:41,261 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:35:41,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:35:41,294 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:35:41,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:35:41,322 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:35:41,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:35:41,348 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:35:41,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:35:41,368 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:35:41,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:35:41,387 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:35:41,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:35:41,412 INFO L134 CoverageAnalysis]: Checked inductivity of 598 backedges. 0 proven. 273 refuted. 0 times theorem prover too weak. 325 trivial. 0 not checked. [2023-02-15 21:35:41,413 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 21:35:41,413 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [569300380] [2023-02-15 21:35:41,413 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [569300380] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 21:35:41,413 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1450200608] [2023-02-15 21:35:41,413 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-02-15 21:35:41,413 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 21:35:41,413 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 21:35:41,418 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 21:35:41,421 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 21:35:41,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:35:41,621 INFO L263 TraceCheckSpWp]: Trace formula consists of 301 conjuncts, 30 conjunts are in the unsatisfiable core [2023-02-15 21:35:41,624 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 21:35:41,733 INFO L134 CoverageAnalysis]: Checked inductivity of 598 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 338 trivial. 0 not checked. [2023-02-15 21:35:41,733 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 21:35:48,271 INFO L134 CoverageAnalysis]: Checked inductivity of 598 backedges. 0 proven. 507 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2023-02-15 21:35:48,272 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1450200608] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 21:35:48,272 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 21:35:48,272 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18, 31] total 37 [2023-02-15 21:35:48,272 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1710894020] [2023-02-15 21:35:48,272 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 21:35:48,272 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2023-02-15 21:35:48,272 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 21:35:48,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2023-02-15 21:35:48,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=357, Invalid=975, Unknown=0, NotChecked=0, Total=1332 [2023-02-15 21:35:48,274 INFO L87 Difference]: Start difference. First operand 62 states and 70 transitions. Second operand has 37 states, 37 states have (on average 2.3513513513513513) internal successors, (87), 37 states have internal predecessors, (87), 16 states have call successors, (16), 1 states have call predecessors, (16), 16 states have return successors, (41), 16 states have call predecessors, (41), 16 states have call successors, (41) [2023-02-15 21:35:48,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 21:35:48,493 INFO L93 Difference]: Finished difference Result 76 states and 87 transitions. [2023-02-15 21:35:48,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-02-15 21:35:48,493 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.3513513513513513) internal successors, (87), 37 states have internal predecessors, (87), 16 states have call successors, (16), 1 states have call predecessors, (16), 16 states have return successors, (41), 16 states have call predecessors, (41), 16 states have call successors, (41) Word has length 101 [2023-02-15 21:35:48,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 21:35:48,494 INFO L225 Difference]: With dead ends: 76 [2023-02-15 21:35:48,494 INFO L226 Difference]: Without dead ends: 70 [2023-02-15 21:35:48,495 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 261 GetRequests, 185 SyntacticMatches, 25 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1058 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=917, Invalid=1839, Unknown=0, NotChecked=0, Total=2756 [2023-02-15 21:35:48,495 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 164 mSDsluCounter, 131 mSDsCounter, 0 mSdLazyCounter, 161 mSolverCounterSat, 94 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 180 SdHoareTripleChecker+Valid, 144 SdHoareTripleChecker+Invalid, 255 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 161 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 21:35:48,496 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [180 Valid, 144 Invalid, 255 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [94 Valid, 161 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 21:35:48,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2023-02-15 21:35:48,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 68. [2023-02-15 21:35:48,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 47 states have (on average 1.1063829787234043) internal successors, (52), 47 states have internal predecessors, (52), 4 states have call successors, (4), 3 states have call predecessors, (4), 16 states have return successors, (20), 17 states have call predecessors, (20), 4 states have call successors, (20) [2023-02-15 21:35:48,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 76 transitions. [2023-02-15 21:35:48,500 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 76 transitions. Word has length 101 [2023-02-15 21:35:48,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 21:35:48,500 INFO L495 AbstractCegarLoop]: Abstraction has 68 states and 76 transitions. [2023-02-15 21:35:48,501 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 2.3513513513513513) internal successors, (87), 37 states have internal predecessors, (87), 16 states have call successors, (16), 1 states have call predecessors, (16), 16 states have return successors, (41), 16 states have call predecessors, (41), 16 states have call successors, (41) [2023-02-15 21:35:48,501 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 76 transitions. [2023-02-15 21:35:48,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2023-02-15 21:35:48,501 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 21:35:48,502 INFO L195 NwaCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 21:35:48,514 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 21:35:48,714 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 21:35:48,715 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 21:35:48,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 21:35:48,715 INFO L85 PathProgramCache]: Analyzing trace with hash 2075065264, now seen corresponding path program 8 times [2023-02-15 21:35:48,715 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 21:35:48,715 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [122870939] [2023-02-15 21:35:48,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 21:35:48,715 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 21:35:48,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:35:48,844 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 21:35:48,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:35:48,971 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:35:48,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:35:49,076 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:35:49,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:35:49,167 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:35:49,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:35:49,251 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:35:49,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:35:49,331 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:35:49,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:35:49,411 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:35:49,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:35:49,465 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:35:49,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:35:49,510 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:35:49,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:35:49,550 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:35:49,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:35:49,583 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:35:49,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:35:49,613 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:35:49,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:35:49,661 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:35:49,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:35:49,682 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:35:49,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:35:49,701 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:35:49,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:35:49,723 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:35:49,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:35:49,746 INFO L134 CoverageAnalysis]: Checked inductivity of 795 backedges. 0 proven. 360 refuted. 0 times theorem prover too weak. 435 trivial. 0 not checked. [2023-02-15 21:35:49,747 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 21:35:49,747 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [122870939] [2023-02-15 21:35:49,747 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [122870939] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 21:35:49,747 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1194601937] [2023-02-15 21:35:49,747 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-15 21:35:49,747 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 21:35:49,748 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 21:35:49,749 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 21:35:49,751 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 21:35:50,076 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-15 21:35:50,076 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 21:35:50,078 INFO L263 TraceCheckSpWp]: Trace formula consists of 339 conjuncts, 34 conjunts are in the unsatisfiable core [2023-02-15 21:35:50,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 21:35:50,170 INFO L134 CoverageAnalysis]: Checked inductivity of 795 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 450 trivial. 0 not checked. [2023-02-15 21:35:50,170 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 21:36:00,378 INFO L134 CoverageAnalysis]: Checked inductivity of 795 backedges. 0 proven. 675 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2023-02-15 21:36:00,379 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1194601937] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 21:36:00,379 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 21:36:00,379 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20, 35] total 41 [2023-02-15 21:36:00,379 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [619303499] [2023-02-15 21:36:00,379 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 21:36:00,380 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2023-02-15 21:36:00,380 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 21:36:00,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2023-02-15 21:36:00,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=437, Invalid=1203, Unknown=0, NotChecked=0, Total=1640 [2023-02-15 21:36:00,381 INFO L87 Difference]: Start difference. First operand 68 states and 76 transitions. Second operand has 41 states, 41 states have (on average 2.3658536585365852) internal successors, (97), 41 states have internal predecessors, (97), 18 states have call successors, (18), 1 states have call predecessors, (18), 18 states have return successors, (47), 18 states have call predecessors, (47), 18 states have call successors, (47) [2023-02-15 21:36:00,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 21:36:00,609 INFO L93 Difference]: Finished difference Result 82 states and 93 transitions. [2023-02-15 21:36:00,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-02-15 21:36:00,610 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.3658536585365852) internal successors, (97), 41 states have internal predecessors, (97), 18 states have call successors, (18), 1 states have call predecessors, (18), 18 states have return successors, (47), 18 states have call predecessors, (47), 18 states have call successors, (47) Word has length 115 [2023-02-15 21:36:00,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 21:36:00,611 INFO L225 Difference]: With dead ends: 82 [2023-02-15 21:36:00,611 INFO L226 Difference]: Without dead ends: 76 [2023-02-15 21:36:00,612 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 297 GetRequests, 211 SyntacticMatches, 29 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1353 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1139, Invalid=2283, Unknown=0, NotChecked=0, Total=3422 [2023-02-15 21:36:00,612 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 95 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 165 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 150 SdHoareTripleChecker+Invalid, 226 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 165 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 21:36:00,613 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [113 Valid, 150 Invalid, 226 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 165 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 21:36:00,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2023-02-15 21:36:00,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 74. [2023-02-15 21:36:00,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 51 states have (on average 1.0980392156862746) internal successors, (56), 51 states have internal predecessors, (56), 4 states have call successors, (4), 3 states have call predecessors, (4), 18 states have return successors, (22), 19 states have call predecessors, (22), 4 states have call successors, (22) [2023-02-15 21:36:00,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 82 transitions. [2023-02-15 21:36:00,618 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 82 transitions. Word has length 115 [2023-02-15 21:36:00,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 21:36:00,619 INFO L495 AbstractCegarLoop]: Abstraction has 74 states and 82 transitions. [2023-02-15 21:36:00,619 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 2.3658536585365852) internal successors, (97), 41 states have internal predecessors, (97), 18 states have call successors, (18), 1 states have call predecessors, (18), 18 states have return successors, (47), 18 states have call predecessors, (47), 18 states have call successors, (47) [2023-02-15 21:36:00,619 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 82 transitions. [2023-02-15 21:36:00,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2023-02-15 21:36:00,620 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 21:36:00,620 INFO L195 NwaCegarLoop]: trace histogram [18, 18, 17, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 21:36:00,627 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 21:36:00,822 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,SelfDestructingSolverStorable9 [2023-02-15 21:36:00,823 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 21:36:00,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 21:36:00,823 INFO L85 PathProgramCache]: Analyzing trace with hash -107806286, now seen corresponding path program 9 times [2023-02-15 21:36:00,823 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 21:36:00,823 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [964395587] [2023-02-15 21:36:00,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 21:36:00,823 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 21:36:00,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:36:00,980 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 21:36:00,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:36:01,121 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:36:01,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:36:01,257 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:36:01,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:36:01,367 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:36:01,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:36:01,470 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:36:01,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:36:01,555 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:36:01,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:36:01,644 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:36:01,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:36:01,711 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:36:01,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:36:01,772 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:36:01,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:36:01,825 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:36:01,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:36:01,870 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:36:01,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:36:01,917 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:36:01,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:36:01,952 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:36:01,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:36:01,982 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:36:01,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:36:02,008 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:36:02,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:36:02,031 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:36:02,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:36:02,074 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:36:02,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:36:02,092 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:36:02,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:36:02,125 INFO L134 CoverageAnalysis]: Checked inductivity of 1020 backedges. 0 proven. 459 refuted. 0 times theorem prover too weak. 561 trivial. 0 not checked. [2023-02-15 21:36:02,125 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 21:36:02,126 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [964395587] [2023-02-15 21:36:02,126 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [964395587] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 21:36:02,126 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1737517599] [2023-02-15 21:36:02,126 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-15 21:36:02,126 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 21:36:02,126 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 21:36:02,127 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 21:36:02,129 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 21:36:02,645 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2023-02-15 21:36:02,646 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 21:36:02,648 INFO L263 TraceCheckSpWp]: Trace formula consists of 377 conjuncts, 38 conjunts are in the unsatisfiable core [2023-02-15 21:36:02,649 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 21:36:02,795 INFO L134 CoverageAnalysis]: Checked inductivity of 1020 backedges. 0 proven. 442 refuted. 0 times theorem prover too weak. 578 trivial. 0 not checked. [2023-02-15 21:36:02,795 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 21:36:16,818 INFO L134 CoverageAnalysis]: Checked inductivity of 1020 backedges. 0 proven. 867 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2023-02-15 21:36:16,818 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1737517599] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 21:36:16,818 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 21:36:16,818 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22, 39] total 45 [2023-02-15 21:36:16,818 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [408632987] [2023-02-15 21:36:16,819 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 21:36:16,819 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2023-02-15 21:36:16,819 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 21:36:16,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2023-02-15 21:36:16,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=525, Invalid=1455, Unknown=0, NotChecked=0, Total=1980 [2023-02-15 21:36:16,821 INFO L87 Difference]: Start difference. First operand 74 states and 82 transitions. Second operand has 45 states, 45 states have (on average 2.3777777777777778) internal successors, (107), 45 states have internal predecessors, (107), 20 states have call successors, (20), 1 states have call predecessors, (20), 20 states have return successors, (53), 20 states have call predecessors, (53), 20 states have call successors, (53) [2023-02-15 21:36:17,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 21:36:17,074 INFO L93 Difference]: Finished difference Result 88 states and 99 transitions. [2023-02-15 21:36:17,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-02-15 21:36:17,075 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 2.3777777777777778) internal successors, (107), 45 states have internal predecessors, (107), 20 states have call successors, (20), 1 states have call predecessors, (20), 20 states have return successors, (53), 20 states have call predecessors, (53), 20 states have call successors, (53) Word has length 129 [2023-02-15 21:36:17,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 21:36:17,076 INFO L225 Difference]: With dead ends: 88 [2023-02-15 21:36:17,076 INFO L226 Difference]: Without dead ends: 82 [2023-02-15 21:36:17,077 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 333 GetRequests, 237 SyntacticMatches, 33 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1684 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1385, Invalid=2775, Unknown=0, NotChecked=0, Total=4160 [2023-02-15 21:36:17,077 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 147 mSDsluCounter, 150 mSDsCounter, 0 mSdLazyCounter, 172 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 167 SdHoareTripleChecker+Valid, 163 SdHoareTripleChecker+Invalid, 271 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 172 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 21:36:17,078 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [167 Valid, 163 Invalid, 271 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 172 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 21:36:17,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2023-02-15 21:36:17,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 80. [2023-02-15 21:36:17,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 55 states have (on average 1.0909090909090908) internal successors, (60), 55 states have internal predecessors, (60), 4 states have call successors, (4), 3 states have call predecessors, (4), 20 states have return successors, (24), 21 states have call predecessors, (24), 4 states have call successors, (24) [2023-02-15 21:36:17,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 88 transitions. [2023-02-15 21:36:17,086 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 88 transitions. Word has length 129 [2023-02-15 21:36:17,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 21:36:17,086 INFO L495 AbstractCegarLoop]: Abstraction has 80 states and 88 transitions. [2023-02-15 21:36:17,087 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 2.3777777777777778) internal successors, (107), 45 states have internal predecessors, (107), 20 states have call successors, (20), 1 states have call predecessors, (20), 20 states have return successors, (53), 20 states have call predecessors, (53), 20 states have call successors, (53) [2023-02-15 21:36:17,087 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 88 transitions. [2023-02-15 21:36:17,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2023-02-15 21:36:17,088 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 21:36:17,088 INFO L195 NwaCegarLoop]: trace histogram [20, 20, 19, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 21:36:17,097 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 21:36:17,292 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 21:36:17,293 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 21:36:17,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 21:36:17,293 INFO L85 PathProgramCache]: Analyzing trace with hash 1602833076, now seen corresponding path program 10 times [2023-02-15 21:36:17,293 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 21:36:17,293 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [777125015] [2023-02-15 21:36:17,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 21:36:17,294 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 21:36:17,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:36:17,460 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 21:36:17,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:36:17,616 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:36:17,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:36:17,779 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:36:17,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:36:17,908 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:36:17,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:36:18,018 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:36:18,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:36:18,126 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:36:18,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:36:18,214 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:36:18,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:36:18,295 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:36:18,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:36:18,369 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:36:18,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:36:18,441 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:36:18,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:36:18,497 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:36:18,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:36:18,560 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:36:18,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:36:18,608 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:36:18,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:36:18,646 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:36:18,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:36:18,685 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:36:18,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:36:18,719 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:36:18,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:36:18,746 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:36:18,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:36:18,770 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:36:18,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:36:18,793 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:36:18,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:36:18,812 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:36:18,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:36:18,843 INFO L134 CoverageAnalysis]: Checked inductivity of 1273 backedges. 0 proven. 570 refuted. 0 times theorem prover too weak. 703 trivial. 0 not checked. [2023-02-15 21:36:18,844 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 21:36:18,844 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [777125015] [2023-02-15 21:36:18,844 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [777125015] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 21:36:18,844 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1125609500] [2023-02-15 21:36:18,844 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-15 21:36:18,844 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 21:36:18,845 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 21:36:18,846 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 21:36:18,848 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 21:36:19,544 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-15 21:36:19,545 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 21:36:19,547 INFO L263 TraceCheckSpWp]: Trace formula consists of 415 conjuncts, 42 conjunts are in the unsatisfiable core [2023-02-15 21:36:19,549 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 21:36:19,698 INFO L134 CoverageAnalysis]: Checked inductivity of 1273 backedges. 0 proven. 551 refuted. 0 times theorem prover too weak. 722 trivial. 0 not checked. [2023-02-15 21:36:19,698 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 21:36:39,628 INFO L134 CoverageAnalysis]: Checked inductivity of 1273 backedges. 0 proven. 1083 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2023-02-15 21:36:39,628 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1125609500] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 21:36:39,628 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 21:36:39,628 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 24, 43] total 49 [2023-02-15 21:36:39,628 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1146348799] [2023-02-15 21:36:39,628 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 21:36:39,629 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2023-02-15 21:36:39,629 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 21:36:39,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2023-02-15 21:36:39,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=621, Invalid=1731, Unknown=0, NotChecked=0, Total=2352 [2023-02-15 21:36:39,630 INFO L87 Difference]: Start difference. First operand 80 states and 88 transitions. Second operand has 49 states, 49 states have (on average 2.3877551020408165) internal successors, (117), 49 states have internal predecessors, (117), 22 states have call successors, (22), 1 states have call predecessors, (22), 22 states have return successors, (59), 22 states have call predecessors, (59), 22 states have call successors, (59) [2023-02-15 21:36:39,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 21:36:39,995 INFO L93 Difference]: Finished difference Result 94 states and 105 transitions. [2023-02-15 21:36:39,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-02-15 21:36:39,995 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 2.3877551020408165) internal successors, (117), 49 states have internal predecessors, (117), 22 states have call successors, (22), 1 states have call predecessors, (22), 22 states have return successors, (59), 22 states have call predecessors, (59), 22 states have call successors, (59) Word has length 143 [2023-02-15 21:36:39,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 21:36:39,996 INFO L225 Difference]: With dead ends: 94 [2023-02-15 21:36:39,996 INFO L226 Difference]: Without dead ends: 88 [2023-02-15 21:36:39,998 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 369 GetRequests, 263 SyntacticMatches, 37 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2051 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1655, Invalid=3315, Unknown=0, NotChecked=0, Total=4970 [2023-02-15 21:36:39,998 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 327 mSDsluCounter, 174 mSDsCounter, 0 mSdLazyCounter, 187 mSolverCounterSat, 191 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 349 SdHoareTripleChecker+Valid, 187 SdHoareTripleChecker+Invalid, 378 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 191 IncrementalHoareTripleChecker+Valid, 187 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 21:36:39,998 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [349 Valid, 187 Invalid, 378 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [191 Valid, 187 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 21:36:39,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2023-02-15 21:36:40,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 86. [2023-02-15 21:36:40,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 59 states have (on average 1.0847457627118644) internal successors, (64), 59 states have internal predecessors, (64), 4 states have call successors, (4), 3 states have call predecessors, (4), 22 states have return successors, (26), 23 states have call predecessors, (26), 4 states have call successors, (26) [2023-02-15 21:36:40,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 94 transitions. [2023-02-15 21:36:40,002 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 94 transitions. Word has length 143 [2023-02-15 21:36:40,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 21:36:40,003 INFO L495 AbstractCegarLoop]: Abstraction has 86 states and 94 transitions. [2023-02-15 21:36:40,003 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 2.3877551020408165) internal successors, (117), 49 states have internal predecessors, (117), 22 states have call successors, (22), 1 states have call predecessors, (22), 22 states have return successors, (59), 22 states have call predecessors, (59), 22 states have call successors, (59) [2023-02-15 21:36:40,003 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 94 transitions. [2023-02-15 21:36:40,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2023-02-15 21:36:40,017 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 21:36:40,018 INFO L195 NwaCegarLoop]: trace histogram [22, 22, 21, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 21:36:40,035 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 21:36:40,227 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,SelfDestructingSolverStorable11 [2023-02-15 21:36:40,228 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 21:36:40,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 21:36:40,228 INFO L85 PathProgramCache]: Analyzing trace with hash -1219250506, now seen corresponding path program 11 times [2023-02-15 21:36:40,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 21:36:40,228 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1616048837] [2023-02-15 21:36:40,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 21:36:40,228 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 21:36:40,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:36:40,449 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 21:36:40,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:36:40,655 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:36:40,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:36:40,814 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:36:40,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:36:40,982 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:36:40,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:36:41,114 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:36:41,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:36:41,237 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:36:41,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:36:41,345 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:36:41,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:36:41,457 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:36:41,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:36:41,545 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:36:41,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:36:41,624 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:36:41,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:36:41,693 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:36:41,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:36:41,755 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:36:41,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:36:41,817 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:36:41,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:36:41,868 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:36:41,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:36:41,925 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:36:41,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:36:41,965 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:36:41,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:36:42,000 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:36:42,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:36:42,033 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:36:42,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:36:42,061 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:36:42,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:36:42,086 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:36:42,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:36:42,109 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:36:42,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:36:42,130 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:36:42,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:36:42,164 INFO L134 CoverageAnalysis]: Checked inductivity of 1554 backedges. 0 proven. 693 refuted. 0 times theorem prover too weak. 861 trivial. 0 not checked. [2023-02-15 21:36:42,164 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 21:36:42,165 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1616048837] [2023-02-15 21:36:42,165 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1616048837] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 21:36:42,165 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1704849277] [2023-02-15 21:36:42,165 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-15 21:36:42,165 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 21:36:42,165 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 21:36:42,166 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 21:36:42,169 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 21:36:43,140 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 22 check-sat command(s) [2023-02-15 21:36:43,140 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 21:36:43,143 INFO L263 TraceCheckSpWp]: Trace formula consists of 453 conjuncts, 46 conjunts are in the unsatisfiable core [2023-02-15 21:36:43,145 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 21:36:43,298 INFO L134 CoverageAnalysis]: Checked inductivity of 1554 backedges. 0 proven. 672 refuted. 0 times theorem prover too weak. 882 trivial. 0 not checked. [2023-02-15 21:36:43,298 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 21:37:10,406 INFO L134 CoverageAnalysis]: Checked inductivity of 1554 backedges. 0 proven. 1323 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2023-02-15 21:37:10,406 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1704849277] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 21:37:10,406 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 21:37:10,406 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 26, 47] total 53 [2023-02-15 21:37:10,406 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1380332635] [2023-02-15 21:37:10,406 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 21:37:10,407 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2023-02-15 21:37:10,407 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 21:37:10,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2023-02-15 21:37:10,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=725, Invalid=2031, Unknown=0, NotChecked=0, Total=2756 [2023-02-15 21:37:10,409 INFO L87 Difference]: Start difference. First operand 86 states and 94 transitions. Second operand has 53 states, 53 states have (on average 2.3962264150943398) internal successors, (127), 53 states have internal predecessors, (127), 24 states have call successors, (24), 1 states have call predecessors, (24), 24 states have return successors, (65), 24 states have call predecessors, (65), 24 states have call successors, (65) [2023-02-15 21:37:10,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 21:37:10,723 INFO L93 Difference]: Finished difference Result 100 states and 111 transitions. [2023-02-15 21:37:10,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-02-15 21:37:10,728 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 2.3962264150943398) internal successors, (127), 53 states have internal predecessors, (127), 24 states have call successors, (24), 1 states have call predecessors, (24), 24 states have return successors, (65), 24 states have call predecessors, (65), 24 states have call successors, (65) Word has length 157 [2023-02-15 21:37:10,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 21:37:10,729 INFO L225 Difference]: With dead ends: 100 [2023-02-15 21:37:10,729 INFO L226 Difference]: Without dead ends: 94 [2023-02-15 21:37:10,730 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 405 GetRequests, 289 SyntacticMatches, 41 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2454 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1949, Invalid=3903, Unknown=0, NotChecked=0, Total=5852 [2023-02-15 21:37:10,731 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 230 mSDsluCounter, 182 mSDsCounter, 0 mSdLazyCounter, 187 mSolverCounterSat, 123 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 254 SdHoareTripleChecker+Valid, 195 SdHoareTripleChecker+Invalid, 310 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 123 IncrementalHoareTripleChecker+Valid, 187 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 21:37:10,731 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [254 Valid, 195 Invalid, 310 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [123 Valid, 187 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 21:37:10,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2023-02-15 21:37:10,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 92. [2023-02-15 21:37:10,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 63 states have (on average 1.0793650793650793) internal successors, (68), 63 states have internal predecessors, (68), 4 states have call successors, (4), 3 states have call predecessors, (4), 24 states have return successors, (28), 25 states have call predecessors, (28), 4 states have call successors, (28) [2023-02-15 21:37:10,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 100 transitions. [2023-02-15 21:37:10,735 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 100 transitions. Word has length 157 [2023-02-15 21:37:10,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 21:37:10,735 INFO L495 AbstractCegarLoop]: Abstraction has 92 states and 100 transitions. [2023-02-15 21:37:10,735 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 2.3962264150943398) internal successors, (127), 53 states have internal predecessors, (127), 24 states have call successors, (24), 1 states have call predecessors, (24), 24 states have return successors, (65), 24 states have call predecessors, (65), 24 states have call successors, (65) [2023-02-15 21:37:10,735 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 100 transitions. [2023-02-15 21:37:10,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2023-02-15 21:37:10,736 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 21:37:10,736 INFO L195 NwaCegarLoop]: trace histogram [24, 24, 23, 23, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 21:37:10,747 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 21:37:10,947 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,SelfDestructingSolverStorable12 [2023-02-15 21:37:10,948 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 21:37:10,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 21:37:10,948 INFO L85 PathProgramCache]: Analyzing trace with hash -954980936, now seen corresponding path program 12 times [2023-02-15 21:37:10,948 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 21:37:10,948 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2026921381] [2023-02-15 21:37:10,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 21:37:10,948 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 21:37:10,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:37:11,169 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 21:37:11,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:37:11,347 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:37:11,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:37:11,523 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:37:11,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:37:11,671 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:37:11,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:37:11,805 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:37:11,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:37:11,946 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:37:11,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:37:12,058 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:37:12,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:37:12,163 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:37:12,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:37:12,302 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:37:12,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:37:12,390 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:37:12,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:37:12,469 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:37:12,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:37:12,541 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:37:12,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:37:12,605 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:37:12,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:37:12,663 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:37:12,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:37:12,716 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:37:12,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:37:12,785 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:37:12,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:37:12,842 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:37:12,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:37:12,885 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:37:12,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:37:12,922 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:37:12,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:37:12,954 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:37:12,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:37:12,983 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:37:12,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:37:13,005 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:37:13,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:37:13,028 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:37:13,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:37:13,049 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:37:13,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:37:13,081 INFO L134 CoverageAnalysis]: Checked inductivity of 1863 backedges. 0 proven. 828 refuted. 0 times theorem prover too weak. 1035 trivial. 0 not checked. [2023-02-15 21:37:13,081 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 21:37:13,081 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2026921381] [2023-02-15 21:37:13,081 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2026921381] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 21:37:13,082 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [775306784] [2023-02-15 21:37:13,082 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-02-15 21:37:13,082 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 21:37:13,082 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 21:37:13,083 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 21:37:13,085 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 21:37:14,448 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 24 check-sat command(s) [2023-02-15 21:37:14,448 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 21:37:14,451 INFO L263 TraceCheckSpWp]: Trace formula consists of 491 conjuncts, 50 conjunts are in the unsatisfiable core [2023-02-15 21:37:14,453 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 21:37:14,600 INFO L134 CoverageAnalysis]: Checked inductivity of 1863 backedges. 0 proven. 805 refuted. 0 times theorem prover too weak. 1058 trivial. 0 not checked. [2023-02-15 21:37:14,600 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 21:37:50,079 INFO L134 CoverageAnalysis]: Checked inductivity of 1863 backedges. 0 proven. 1587 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2023-02-15 21:37:50,079 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [775306784] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 21:37:50,079 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 21:37:50,079 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 28, 51] total 57 [2023-02-15 21:37:50,080 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1053352052] [2023-02-15 21:37:50,080 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 21:37:50,080 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2023-02-15 21:37:50,080 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 21:37:50,081 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2023-02-15 21:37:50,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=837, Invalid=2355, Unknown=0, NotChecked=0, Total=3192 [2023-02-15 21:37:50,082 INFO L87 Difference]: Start difference. First operand 92 states and 100 transitions. Second operand has 57 states, 57 states have (on average 2.4035087719298245) internal successors, (137), 57 states have internal predecessors, (137), 26 states have call successors, (26), 1 states have call predecessors, (26), 26 states have return successors, (71), 26 states have call predecessors, (71), 26 states have call successors, (71) [2023-02-15 21:37:50,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 21:37:50,486 INFO L93 Difference]: Finished difference Result 106 states and 117 transitions. [2023-02-15 21:37:50,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2023-02-15 21:37:50,487 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 2.4035087719298245) internal successors, (137), 57 states have internal predecessors, (137), 26 states have call successors, (26), 1 states have call predecessors, (26), 26 states have return successors, (71), 26 states have call predecessors, (71), 26 states have call successors, (71) Word has length 171 [2023-02-15 21:37:50,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 21:37:50,488 INFO L225 Difference]: With dead ends: 106 [2023-02-15 21:37:50,488 INFO L226 Difference]: Without dead ends: 100 [2023-02-15 21:37:50,490 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 441 GetRequests, 315 SyntacticMatches, 45 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2893 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=2267, Invalid=4539, Unknown=0, NotChecked=0, Total=6806 [2023-02-15 21:37:50,490 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 656 mSDsluCounter, 191 mSDsCounter, 0 mSdLazyCounter, 197 mSolverCounterSat, 381 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 682 SdHoareTripleChecker+Valid, 204 SdHoareTripleChecker+Invalid, 578 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 381 IncrementalHoareTripleChecker+Valid, 197 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-15 21:37:50,490 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [682 Valid, 204 Invalid, 578 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [381 Valid, 197 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-15 21:37:50,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2023-02-15 21:37:50,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 98. [2023-02-15 21:37:50,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 67 states have (on average 1.0746268656716418) internal successors, (72), 67 states have internal predecessors, (72), 4 states have call successors, (4), 3 states have call predecessors, (4), 26 states have return successors, (30), 27 states have call predecessors, (30), 4 states have call successors, (30) [2023-02-15 21:37:50,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 106 transitions. [2023-02-15 21:37:50,494 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 106 transitions. Word has length 171 [2023-02-15 21:37:50,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 21:37:50,494 INFO L495 AbstractCegarLoop]: Abstraction has 98 states and 106 transitions. [2023-02-15 21:37:50,495 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 2.4035087719298245) internal successors, (137), 57 states have internal predecessors, (137), 26 states have call successors, (26), 1 states have call predecessors, (26), 26 states have return successors, (71), 26 states have call predecessors, (71), 26 states have call successors, (71) [2023-02-15 21:37:50,495 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 106 transitions. [2023-02-15 21:37:50,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2023-02-15 21:37:50,496 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 21:37:50,496 INFO L195 NwaCegarLoop]: trace histogram [26, 26, 25, 25, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 21:37:50,508 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 21:37:50,708 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,SelfDestructingSolverStorable13 [2023-02-15 21:37:50,708 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 21:37:50,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 21:37:50,709 INFO L85 PathProgramCache]: Analyzing trace with hash 1800173498, now seen corresponding path program 13 times [2023-02-15 21:37:50,709 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 21:37:50,709 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1330326080] [2023-02-15 21:37:50,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 21:37:50,709 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 21:37:50,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:37:50,936 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 21:37:50,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:37:51,141 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:37:51,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:37:51,371 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:37:51,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:37:51,546 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:37:51,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:37:51,709 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:37:51,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:37:51,862 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:37:51,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:37:52,022 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:37:52,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:37:52,147 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:37:52,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:37:52,277 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:37:52,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:37:52,381 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:37:52,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:37:52,485 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:37:52,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:37:52,573 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:37:52,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:37:52,653 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:37:52,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:37:52,751 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:37:52,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:37:52,816 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:37:52,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:37:52,876 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:37:52,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:37:52,930 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:37:52,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:37:52,984 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:37:52,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:37:53,031 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:37:53,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:37:53,069 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:37:53,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:37:53,103 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:37:53,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:37:53,133 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:37:53,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:37:53,163 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:37:53,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:37:53,190 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:37:53,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:37:53,226 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:37:53,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:37:53,248 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:37:53,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:37:53,282 INFO L134 CoverageAnalysis]: Checked inductivity of 2200 backedges. 0 proven. 975 refuted. 0 times theorem prover too weak. 1225 trivial. 0 not checked. [2023-02-15 21:37:53,283 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 21:37:53,283 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1330326080] [2023-02-15 21:37:53,283 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1330326080] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 21:37:53,283 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [929403229] [2023-02-15 21:37:53,283 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-02-15 21:37:53,283 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 21:37:53,283 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 21:37:53,284 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 21:37:53,286 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 21:37:55,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:37:55,103 INFO L263 TraceCheckSpWp]: Trace formula consists of 529 conjuncts, 54 conjunts are in the unsatisfiable core [2023-02-15 21:37:55,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 21:37:55,285 INFO L134 CoverageAnalysis]: Checked inductivity of 2200 backedges. 0 proven. 950 refuted. 0 times theorem prover too weak. 1250 trivial. 0 not checked. [2023-02-15 21:37:55,285 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 21:38:41,508 INFO L134 CoverageAnalysis]: Checked inductivity of 2200 backedges. 0 proven. 1875 refuted. 0 times theorem prover too weak. 325 trivial. 0 not checked. [2023-02-15 21:38:41,508 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [929403229] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 21:38:41,508 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 21:38:41,508 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 30, 55] total 61 [2023-02-15 21:38:41,509 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1089857790] [2023-02-15 21:38:41,509 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 21:38:41,509 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2023-02-15 21:38:41,509 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 21:38:41,510 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2023-02-15 21:38:41,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=957, Invalid=2703, Unknown=0, NotChecked=0, Total=3660 [2023-02-15 21:38:41,511 INFO L87 Difference]: Start difference. First operand 98 states and 106 transitions. Second operand has 61 states, 61 states have (on average 2.4098360655737703) internal successors, (147), 61 states have internal predecessors, (147), 28 states have call successors, (28), 1 states have call predecessors, (28), 28 states have return successors, (77), 28 states have call predecessors, (77), 28 states have call successors, (77) [2023-02-15 21:38:41,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 21:38:41,868 INFO L93 Difference]: Finished difference Result 112 states and 123 transitions. [2023-02-15 21:38:41,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-02-15 21:38:41,869 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 61 states have (on average 2.4098360655737703) internal successors, (147), 61 states have internal predecessors, (147), 28 states have call successors, (28), 1 states have call predecessors, (28), 28 states have return successors, (77), 28 states have call predecessors, (77), 28 states have call successors, (77) Word has length 185 [2023-02-15 21:38:41,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 21:38:41,869 INFO L225 Difference]: With dead ends: 112 [2023-02-15 21:38:41,869 INFO L226 Difference]: Without dead ends: 106 [2023-02-15 21:38:41,871 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 477 GetRequests, 341 SyntacticMatches, 49 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3368 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=2609, Invalid=5223, Unknown=0, NotChecked=0, Total=7832 [2023-02-15 21:38:41,871 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 262 mSDsluCounter, 205 mSDsCounter, 0 mSdLazyCounter, 205 mSolverCounterSat, 144 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 290 SdHoareTripleChecker+Valid, 218 SdHoareTripleChecker+Invalid, 349 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 144 IncrementalHoareTripleChecker+Valid, 205 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 21:38:41,872 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [290 Valid, 218 Invalid, 349 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [144 Valid, 205 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 21:38:41,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2023-02-15 21:38:41,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 104. [2023-02-15 21:38:41,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 71 states have (on average 1.0704225352112675) internal successors, (76), 71 states have internal predecessors, (76), 4 states have call successors, (4), 3 states have call predecessors, (4), 28 states have return successors, (32), 29 states have call predecessors, (32), 4 states have call successors, (32) [2023-02-15 21:38:41,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 112 transitions. [2023-02-15 21:38:41,875 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 112 transitions. Word has length 185 [2023-02-15 21:38:41,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 21:38:41,878 INFO L495 AbstractCegarLoop]: Abstraction has 104 states and 112 transitions. [2023-02-15 21:38:41,878 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 61 states have (on average 2.4098360655737703) internal successors, (147), 61 states have internal predecessors, (147), 28 states have call successors, (28), 1 states have call predecessors, (28), 28 states have return successors, (77), 28 states have call predecessors, (77), 28 states have call successors, (77) [2023-02-15 21:38:41,878 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 112 transitions. [2023-02-15 21:38:41,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2023-02-15 21:38:41,879 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 21:38:41,879 INFO L195 NwaCegarLoop]: trace histogram [28, 28, 27, 27, 27, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 21:38:41,895 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2023-02-15 21:38:42,093 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,SelfDestructingSolverStorable14 [2023-02-15 21:38:42,093 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 21:38:42,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 21:38:42,094 INFO L85 PathProgramCache]: Analyzing trace with hash -253850436, now seen corresponding path program 14 times [2023-02-15 21:38:42,094 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 21:38:42,094 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1084409249] [2023-02-15 21:38:42,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 21:38:42,094 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 21:38:42,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:38:42,355 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 21:38:42,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:38:42,649 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:38:42,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:38:42,849 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:38:42,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:38:43,040 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:38:43,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:38:43,219 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:38:43,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:38:43,411 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:38:43,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:38:43,566 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:38:43,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:38:43,707 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:38:43,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:38:43,840 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:38:43,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:38:43,962 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:38:43,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:38:44,076 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:38:44,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:38:44,182 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:38:44,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:38:44,303 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:38:44,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:38:44,393 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:38:44,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:38:44,473 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:38:44,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:38:44,545 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:38:44,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:38:44,610 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:38:44,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:38:44,670 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:38:44,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:38:44,723 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:38:44,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:38:44,771 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:38:44,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:38:44,814 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:38:44,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:38:44,852 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:38:44,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:38:44,900 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:38:44,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:38:44,932 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:38:44,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:38:44,961 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:38:44,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:38:44,987 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:38:44,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:38:45,011 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:38:45,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:38:45,035 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:38:45,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:38:45,070 INFO L134 CoverageAnalysis]: Checked inductivity of 2565 backedges. 0 proven. 1134 refuted. 0 times theorem prover too weak. 1431 trivial. 0 not checked. [2023-02-15 21:38:45,070 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 21:38:45,071 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1084409249] [2023-02-15 21:38:45,071 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1084409249] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 21:38:45,071 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2125989686] [2023-02-15 21:38:45,071 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-15 21:38:45,071 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 21:38:45,071 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 21:38:45,072 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 21:38:45,073 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 21:38:47,520 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-15 21:38:47,520 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 21:38:47,522 INFO L263 TraceCheckSpWp]: Trace formula consists of 567 conjuncts, 58 conjunts are in the unsatisfiable core [2023-02-15 21:38:47,524 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 21:38:47,744 INFO L134 CoverageAnalysis]: Checked inductivity of 2565 backedges. 0 proven. 1107 refuted. 0 times theorem prover too weak. 1458 trivial. 0 not checked. [2023-02-15 21:38:47,744 INFO L328 TraceCheckSpWp]: Computing backward predicates...