./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/loops-crafted-1/nested3-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 26d01a9c 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/loops-crafted-1/nested3-1.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 ed8e064f31e82b4c33cb383334d25637eef982ae8d5b8603579b97c7fdfe808e --- Real Ultimate output --- This is Ultimate 0.2.2-?-26d01a9 [2023-02-18 00:47:33,723 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-02-18 00:47:33,725 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-02-18 00:47:33,752 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-02-18 00:47:33,753 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-02-18 00:47:33,755 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-02-18 00:47:33,757 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-02-18 00:47:33,758 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-02-18 00:47:33,760 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-02-18 00:47:33,763 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-02-18 00:47:33,764 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-02-18 00:47:33,766 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-02-18 00:47:33,766 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-02-18 00:47:33,769 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-02-18 00:47:33,770 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-02-18 00:47:33,771 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-02-18 00:47:33,771 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-02-18 00:47:33,772 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-02-18 00:47:33,773 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-02-18 00:47:33,777 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-02-18 00:47:33,778 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-02-18 00:47:33,778 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-02-18 00:47:33,779 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-02-18 00:47:33,780 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-02-18 00:47:33,785 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-02-18 00:47:33,786 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-02-18 00:47:33,786 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-02-18 00:47:33,787 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-02-18 00:47:33,787 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-02-18 00:47:33,788 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-02-18 00:47:33,788 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-02-18 00:47:33,788 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-02-18 00:47:33,789 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-02-18 00:47:33,790 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-02-18 00:47:33,791 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-02-18 00:47:33,791 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-02-18 00:47:33,791 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-02-18 00:47:33,792 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-02-18 00:47:33,792 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-02-18 00:47:33,793 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-02-18 00:47:33,793 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-02-18 00:47:33,794 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-02-18 00:47:33,815 INFO L113 SettingsManager]: Loading preferences was successful [2023-02-18 00:47:33,815 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-02-18 00:47:33,816 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-02-18 00:47:33,816 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-02-18 00:47:33,816 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-02-18 00:47:33,817 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-02-18 00:47:33,817 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-02-18 00:47:33,817 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-02-18 00:47:33,818 INFO L138 SettingsManager]: * Use SBE=true [2023-02-18 00:47:33,818 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-02-18 00:47:33,818 INFO L138 SettingsManager]: * sizeof long=4 [2023-02-18 00:47:33,818 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-02-18 00:47:33,819 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-02-18 00:47:33,819 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-02-18 00:47:33,819 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-02-18 00:47:33,819 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-02-18 00:47:33,819 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-02-18 00:47:33,819 INFO L138 SettingsManager]: * sizeof long double=12 [2023-02-18 00:47:33,819 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-02-18 00:47:33,819 INFO L138 SettingsManager]: * Use constant arrays=true [2023-02-18 00:47:33,820 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-02-18 00:47:33,820 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-02-18 00:47:33,820 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-02-18 00:47:33,820 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-02-18 00:47:33,820 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-18 00:47:33,820 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-02-18 00:47:33,820 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-02-18 00:47:33,821 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-02-18 00:47:33,821 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-02-18 00:47:33,821 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-02-18 00:47:33,821 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-02-18 00:47:33,821 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-02-18 00:47:33,822 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-02-18 00:47:33,822 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-02-18 00:47:33,822 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-02-18 00:47:33,822 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ed8e064f31e82b4c33cb383334d25637eef982ae8d5b8603579b97c7fdfe808e [2023-02-18 00:47:34,006 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-02-18 00:47:34,022 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-02-18 00:47:34,024 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-02-18 00:47:34,025 INFO L271 PluginConnector]: Initializing CDTParser... [2023-02-18 00:47:34,025 INFO L275 PluginConnector]: CDTParser initialized [2023-02-18 00:47:34,026 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loops-crafted-1/nested3-1.c [2023-02-18 00:47:34,905 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-02-18 00:47:35,052 INFO L351 CDTParser]: Found 1 translation units. [2023-02-18 00:47:35,052 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loops-crafted-1/nested3-1.c [2023-02-18 00:47:35,055 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bde0a16b2/9ddc7345185f42579f8adbe8bf005929/FLAG47ce6d739 [2023-02-18 00:47:35,063 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bde0a16b2/9ddc7345185f42579f8adbe8bf005929 [2023-02-18 00:47:35,065 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-02-18 00:47:35,066 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-02-18 00:47:35,067 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-02-18 00:47:35,067 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-02-18 00:47:35,069 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-02-18 00:47:35,069 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.02 12:47:35" (1/1) ... [2023-02-18 00:47:35,070 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@27b162b9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 12:47:35, skipping insertion in model container [2023-02-18 00:47:35,070 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.02 12:47:35" (1/1) ... [2023-02-18 00:47:35,075 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-02-18 00:47:35,085 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-02-18 00:47:35,159 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/loops-crafted-1/nested3-1.c[321,334] [2023-02-18 00:47:35,173 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-18 00:47:35,181 INFO L203 MainTranslator]: Completed pre-run [2023-02-18 00:47:35,191 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/loops-crafted-1/nested3-1.c[321,334] [2023-02-18 00:47:35,197 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-18 00:47:35,206 INFO L208 MainTranslator]: Completed translation [2023-02-18 00:47:35,206 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 12:47:35 WrapperNode [2023-02-18 00:47:35,206 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-02-18 00:47:35,207 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-02-18 00:47:35,207 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-02-18 00:47:35,207 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-02-18 00:47:35,217 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 12:47:35" (1/1) ... [2023-02-18 00:47:35,221 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 12:47:35" (1/1) ... [2023-02-18 00:47:35,237 INFO L138 Inliner]: procedures = 12, calls = 10, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 42 [2023-02-18 00:47:35,238 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-02-18 00:47:35,238 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-02-18 00:47:35,238 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-02-18 00:47:35,238 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-02-18 00:47:35,244 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 12:47:35" (1/1) ... [2023-02-18 00:47:35,244 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 12:47:35" (1/1) ... [2023-02-18 00:47:35,245 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 12:47:35" (1/1) ... [2023-02-18 00:47:35,245 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 12:47:35" (1/1) ... [2023-02-18 00:47:35,247 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 12:47:35" (1/1) ... [2023-02-18 00:47:35,249 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 12:47:35" (1/1) ... [2023-02-18 00:47:35,250 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 12:47:35" (1/1) ... [2023-02-18 00:47:35,250 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 12:47:35" (1/1) ... [2023-02-18 00:47:35,251 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-02-18 00:47:35,252 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-02-18 00:47:35,252 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-02-18 00:47:35,252 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-02-18 00:47:35,252 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 12:47:35" (1/1) ... [2023-02-18 00:47:35,256 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-18 00:47:35,264 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:47:35,274 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) [2023-02-18 00:47:35,284 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 [2023-02-18 00:47:35,302 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-02-18 00:47:35,303 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-02-18 00:47:35,303 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-02-18 00:47:35,303 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-02-18 00:47:35,303 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-02-18 00:47:35,303 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-02-18 00:47:35,346 INFO L235 CfgBuilder]: Building ICFG [2023-02-18 00:47:35,348 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2023-02-18 00:47:35,482 INFO L276 CfgBuilder]: Performing block encoding [2023-02-18 00:47:35,485 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-02-18 00:47:35,485 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2023-02-18 00:47:35,487 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.02 12:47:35 BoogieIcfgContainer [2023-02-18 00:47:35,487 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-02-18 00:47:35,488 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-02-18 00:47:35,488 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-02-18 00:47:35,494 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-02-18 00:47:35,495 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.02 12:47:35" (1/3) ... [2023-02-18 00:47:35,495 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1a47e3e7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.02 12:47:35, skipping insertion in model container [2023-02-18 00:47:35,496 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 12:47:35" (2/3) ... [2023-02-18 00:47:35,496 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1a47e3e7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.02 12:47:35, skipping insertion in model container [2023-02-18 00:47:35,496 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.02 12:47:35" (3/3) ... [2023-02-18 00:47:35,497 INFO L112 eAbstractionObserver]: Analyzing ICFG nested3-1.c [2023-02-18 00:47:35,508 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-02-18 00:47:35,508 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-02-18 00:47:35,560 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-02-18 00:47:35,574 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;@53c3d00e, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-02-18 00:47:35,583 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-02-18 00:47:35,586 INFO L276 IsEmpty]: Start isEmpty. Operand has 20 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 15 states have internal predecessors, (22), 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) [2023-02-18 00:47:35,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-02-18 00:47:35,591 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:47:35,592 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-02-18 00:47:35,593 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:47:35,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:47:35,599 INFO L85 PathProgramCache]: Analyzing trace with hash 1810304921, now seen corresponding path program 1 times [2023-02-18 00:47:35,605 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:47:35,605 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [948445510] [2023-02-18 00:47:35,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:47:35,606 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:47:35,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:47:35,804 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:47:35,805 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:47:35,805 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [948445510] [2023-02-18 00:47:35,806 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [948445510] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 00:47:35,806 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 00:47:35,806 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-18 00:47:35,807 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [71236687] [2023-02-18 00:47:35,808 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 00:47:35,811 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-18 00:47:35,811 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:47:35,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-18 00:47:35,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-18 00:47:35,846 INFO L87 Difference]: Start difference. First operand has 20 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 15 states have internal predecessors, (22), 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 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:47:35,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:47:35,894 INFO L93 Difference]: Finished difference Result 45 states and 74 transitions. [2023-02-18 00:47:35,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-18 00:47:35,896 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2023-02-18 00:47:35,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:47:35,902 INFO L225 Difference]: With dead ends: 45 [2023-02-18 00:47:35,903 INFO L226 Difference]: Without dead ends: 23 [2023-02-18 00:47:35,906 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-18 00:47:35,909 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 6 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-18 00:47:35,909 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 44 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 00:47:35,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2023-02-18 00:47:35,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 17. [2023-02-18 00:47:35,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 12 states have (on average 1.3333333333333333) internal successors, (16), 13 states have internal predecessors, (16), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-18 00:47:35,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 21 transitions. [2023-02-18 00:47:35,936 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 21 transitions. Word has length 7 [2023-02-18 00:47:35,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:47:35,937 INFO L495 AbstractCegarLoop]: Abstraction has 17 states and 21 transitions. [2023-02-18 00:47:35,937 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:47:35,937 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 21 transitions. [2023-02-18 00:47:35,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-02-18 00:47:35,938 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:47:35,938 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 00:47:35,938 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-02-18 00:47:35,939 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:47:35,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:47:35,940 INFO L85 PathProgramCache]: Analyzing trace with hash 300961951, now seen corresponding path program 1 times [2023-02-18 00:47:35,940 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:47:35,940 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1408276117] [2023-02-18 00:47:35,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:47:35,941 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:47:35,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:47:36,045 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:47:36,046 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:47:36,046 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1408276117] [2023-02-18 00:47:36,046 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1408276117] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 00:47:36,047 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 00:47:36,047 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-18 00:47:36,047 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [496846817] [2023-02-18 00:47:36,047 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 00:47:36,048 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-18 00:47:36,049 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:47:36,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-18 00:47:36,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-18 00:47:36,050 INFO L87 Difference]: Start difference. First operand 17 states and 21 transitions. Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:47:36,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:47:36,073 INFO L93 Difference]: Finished difference Result 35 states and 46 transitions. [2023-02-18 00:47:36,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-18 00:47:36,073 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2023-02-18 00:47:36,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:47:36,074 INFO L225 Difference]: With dead ends: 35 [2023-02-18 00:47:36,074 INFO L226 Difference]: Without dead ends: 21 [2023-02-18 00:47:36,076 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-18 00:47:36,078 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 3 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-18 00:47:36,078 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 33 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 00:47:36,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2023-02-18 00:47:36,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 18. [2023-02-18 00:47:36,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 14 states have internal predecessors, (17), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-18 00:47:36,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 22 transitions. [2023-02-18 00:47:36,085 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 22 transitions. Word has length 8 [2023-02-18 00:47:36,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:47:36,085 INFO L495 AbstractCegarLoop]: Abstraction has 18 states and 22 transitions. [2023-02-18 00:47:36,086 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:47:36,087 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 22 transitions. [2023-02-18 00:47:36,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2023-02-18 00:47:36,088 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:47:36,088 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 00:47:36,088 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-02-18 00:47:36,089 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:47:36,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:47:36,094 INFO L85 PathProgramCache]: Analyzing trace with hash 766069286, now seen corresponding path program 1 times [2023-02-18 00:47:36,095 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:47:36,095 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2121355972] [2023-02-18 00:47:36,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:47:36,095 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:47:36,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:47:36,154 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:47:36,154 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:47:36,154 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2121355972] [2023-02-18 00:47:36,155 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2121355972] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 00:47:36,155 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 00:47:36,155 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-18 00:47:36,155 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [668492105] [2023-02-18 00:47:36,155 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 00:47:36,155 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-18 00:47:36,156 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:47:36,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-18 00:47:36,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-18 00:47:36,156 INFO L87 Difference]: Start difference. First operand 18 states and 22 transitions. Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:47:36,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:47:36,167 INFO L93 Difference]: Finished difference Result 35 states and 44 transitions. [2023-02-18 00:47:36,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-18 00:47:36,168 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2023-02-18 00:47:36,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:47:36,169 INFO L225 Difference]: With dead ends: 35 [2023-02-18 00:47:36,169 INFO L226 Difference]: Without dead ends: 20 [2023-02-18 00:47:36,170 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-18 00:47:36,171 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 1 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-18 00:47:36,174 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 34 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 00:47:36,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2023-02-18 00:47:36,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 19. [2023-02-18 00:47:36,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 14 states have (on average 1.2857142857142858) internal successors, (18), 15 states have internal predecessors, (18), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-18 00:47:36,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 23 transitions. [2023-02-18 00:47:36,179 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 23 transitions. Word has length 9 [2023-02-18 00:47:36,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:47:36,179 INFO L495 AbstractCegarLoop]: Abstraction has 19 states and 23 transitions. [2023-02-18 00:47:36,179 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:47:36,180 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 23 transitions. [2023-02-18 00:47:36,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-02-18 00:47:36,180 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:47:36,180 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 00:47:36,180 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-02-18 00:47:36,181 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:47:36,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:47:36,181 INFO L85 PathProgramCache]: Analyzing trace with hash -1993625471, now seen corresponding path program 1 times [2023-02-18 00:47:36,181 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:47:36,182 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1545460583] [2023-02-18 00:47:36,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:47:36,182 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:47:36,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:47:36,279 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:47:36,279 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:47:36,279 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1545460583] [2023-02-18 00:47:36,279 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1545460583] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 00:47:36,279 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [769422102] [2023-02-18 00:47:36,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:47:36,280 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:47:36,280 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:47:36,282 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) [2023-02-18 00:47:36,284 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-02-18 00:47:36,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:47:36,318 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 5 conjunts are in the unsatisfiable core [2023-02-18 00:47:36,321 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 00:47:36,335 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:47:36,336 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 00:47:36,347 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:47:36,347 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [769422102] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 00:47:36,347 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 00:47:36,347 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2023-02-18 00:47:36,348 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1163168985] [2023-02-18 00:47:36,348 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 00:47:36,348 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-02-18 00:47:36,348 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:47:36,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-02-18 00:47:36,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2023-02-18 00:47:36,349 INFO L87 Difference]: Start difference. First operand 19 states and 23 transitions. Second operand has 7 states, 7 states have (on average 2.0) internal successors, (14), 7 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:47:36,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:47:36,367 INFO L93 Difference]: Finished difference Result 39 states and 50 transitions. [2023-02-18 00:47:36,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-18 00:47:36,368 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.0) internal successors, (14), 7 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2023-02-18 00:47:36,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:47:36,368 INFO L225 Difference]: With dead ends: 39 [2023-02-18 00:47:36,368 INFO L226 Difference]: Without dead ends: 23 [2023-02-18 00:47:36,369 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=30, Unknown=0, NotChecked=0, Total=56 [2023-02-18 00:47:36,369 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 3 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-18 00:47:36,370 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 50 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 00:47:36,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2023-02-18 00:47:36,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 22. [2023-02-18 00:47:36,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 18 states have internal predecessors, (21), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-18 00:47:36,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 26 transitions. [2023-02-18 00:47:36,373 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 26 transitions. Word has length 10 [2023-02-18 00:47:36,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:47:36,373 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 26 transitions. [2023-02-18 00:47:36,373 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.0) internal successors, (14), 7 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:47:36,373 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 26 transitions. [2023-02-18 00:47:36,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-02-18 00:47:36,374 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:47:36,374 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 00:47:36,381 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-02-18 00:47:36,580 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:47:36,581 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:47:36,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:47:36,581 INFO L85 PathProgramCache]: Analyzing trace with hash 775784678, now seen corresponding path program 2 times [2023-02-18 00:47:36,581 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:47:36,581 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [906272369] [2023-02-18 00:47:36,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:47:36,583 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:47:36,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:47:36,678 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:47:36,678 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:47:36,678 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [906272369] [2023-02-18 00:47:36,678 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [906272369] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 00:47:36,679 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [496894086] [2023-02-18 00:47:36,679 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-18 00:47:36,679 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:47:36,679 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:47:36,680 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) [2023-02-18 00:47:36,682 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-02-18 00:47:36,725 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-18 00:47:36,725 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 00:47:36,726 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 11 conjunts are in the unsatisfiable core [2023-02-18 00:47:36,726 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 00:47:36,759 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:47:36,759 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 00:47:36,809 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:47:36,809 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [496894086] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 00:47:36,809 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 00:47:36,809 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2023-02-18 00:47:36,810 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [418761217] [2023-02-18 00:47:36,810 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 00:47:36,810 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-02-18 00:47:36,810 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:47:36,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-02-18 00:47:36,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=98, Unknown=0, NotChecked=0, Total=156 [2023-02-18 00:47:36,811 INFO L87 Difference]: Start difference. First operand 22 states and 26 transitions. Second operand has 13 states, 13 states have (on average 1.5384615384615385) internal successors, (20), 13 states have internal predecessors, (20), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:47:36,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:47:36,906 INFO L93 Difference]: Finished difference Result 48 states and 62 transitions. [2023-02-18 00:47:36,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-02-18 00:47:36,907 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.5384615384615385) internal successors, (20), 13 states have internal predecessors, (20), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2023-02-18 00:47:36,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:47:36,907 INFO L225 Difference]: With dead ends: 48 [2023-02-18 00:47:36,907 INFO L226 Difference]: Without dead ends: 29 [2023-02-18 00:47:36,908 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 16 SyntacticMatches, 5 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=110, Invalid=162, Unknown=0, NotChecked=0, Total=272 [2023-02-18 00:47:36,908 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 2 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-18 00:47:36,908 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 127 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 00:47:36,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2023-02-18 00:47:36,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2023-02-18 00:47:36,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 23 states have (on average 1.173913043478261) internal successors, (27), 24 states have internal predecessors, (27), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-18 00:47:36,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2023-02-18 00:47:36,912 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 13 [2023-02-18 00:47:36,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:47:36,913 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2023-02-18 00:47:36,913 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.5384615384615385) internal successors, (20), 13 states have internal predecessors, (20), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:47:36,913 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2023-02-18 00:47:36,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-02-18 00:47:36,913 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:47:36,913 INFO L195 NwaCegarLoop]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 00:47:36,920 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-02-18 00:47:37,120 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:47:37,120 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:47:37,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:47:37,121 INFO L85 PathProgramCache]: Analyzing trace with hash 2064634630, now seen corresponding path program 3 times [2023-02-18 00:47:37,121 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:47:37,121 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2079125687] [2023-02-18 00:47:37,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:47:37,121 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:47:37,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:47:37,269 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:47:37,270 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:47:37,270 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2079125687] [2023-02-18 00:47:37,270 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2079125687] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 00:47:37,270 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [51190032] [2023-02-18 00:47:37,270 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-18 00:47:37,270 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:47:37,271 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:47:37,272 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) [2023-02-18 00:47:37,280 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-02-18 00:47:37,315 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-02-18 00:47:37,315 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 00:47:37,316 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 10 conjunts are in the unsatisfiable core [2023-02-18 00:47:37,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 00:47:38,546 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-02-18 00:47:38,546 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-18 00:47:38,546 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [51190032] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 00:47:38,546 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-02-18 00:47:38,546 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [13] total 17 [2023-02-18 00:47:38,547 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1964199015] [2023-02-18 00:47:38,547 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 00:47:38,547 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-02-18 00:47:38,548 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:47:38,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-18 00:47:38,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2023-02-18 00:47:38,550 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand has 6 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:47:39,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:47:39,806 INFO L93 Difference]: Finished difference Result 35 states and 38 transitions. [2023-02-18 00:47:39,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-18 00:47:39,807 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2023-02-18 00:47:39,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:47:39,807 INFO L225 Difference]: With dead ends: 35 [2023-02-18 00:47:39,807 INFO L226 Difference]: Without dead ends: 33 [2023-02-18 00:47:39,807 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2023-02-18 00:47:39,808 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 15 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-18 00:47:39,808 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 57 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-18 00:47:39,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2023-02-18 00:47:39,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 32. [2023-02-18 00:47:39,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 26 states have (on average 1.1538461538461537) internal successors, (30), 27 states have internal predecessors, (30), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-18 00:47:39,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 35 transitions. [2023-02-18 00:47:39,813 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 35 transitions. Word has length 19 [2023-02-18 00:47:39,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:47:39,813 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 35 transitions. [2023-02-18 00:47:39,813 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 00:47:39,813 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 35 transitions. [2023-02-18 00:47:39,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-02-18 00:47:39,814 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:47:39,814 INFO L195 NwaCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 00:47:39,837 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-02-18 00:47:40,037 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:47:40,037 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:47:40,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:47:40,038 INFO L85 PathProgramCache]: Analyzing trace with hash 1529129531, now seen corresponding path program 1 times [2023-02-18 00:47:40,038 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:47:40,038 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1410010311] [2023-02-18 00:47:40,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:47:40,038 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:47:40,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:47:40,170 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2023-02-18 00:47:40,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:47:40,173 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 3 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:47:40,174 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:47:40,174 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1410010311] [2023-02-18 00:47:40,174 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1410010311] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 00:47:40,174 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [45200401] [2023-02-18 00:47:40,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:47:40,174 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:47:40,174 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:47:40,175 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) [2023-02-18 00:47:40,177 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-02-18 00:47:40,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:47:40,207 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 10 conjunts are in the unsatisfiable core [2023-02-18 00:47:40,211 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 00:47:40,257 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 2 proven. 20 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-02-18 00:47:40,257 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 00:47:40,337 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 20 proven. 2 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-02-18 00:47:40,338 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [45200401] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 00:47:40,338 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 00:47:40,338 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 6, 6] total 21 [2023-02-18 00:47:40,338 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1529036092] [2023-02-18 00:47:40,338 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 00:47:40,339 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-02-18 00:47:40,339 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:47:40,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-02-18 00:47:40,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2023-02-18 00:47:40,340 INFO L87 Difference]: Start difference. First operand 32 states and 35 transitions. Second operand has 21 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 21 states have internal predecessors, (39), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-18 00:47:40,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:47:40,935 INFO L93 Difference]: Finished difference Result 108 states and 127 transitions. [2023-02-18 00:47:40,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2023-02-18 00:47:40,936 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 21 states have internal predecessors, (39), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 26 [2023-02-18 00:47:40,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:47:40,936 INFO L225 Difference]: With dead ends: 108 [2023-02-18 00:47:40,937 INFO L226 Difference]: Without dead ends: 79 [2023-02-18 00:47:40,938 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 42 SyntacticMatches, 5 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1119 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=618, Invalid=3542, Unknown=0, NotChecked=0, Total=4160 [2023-02-18 00:47:40,939 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 46 mSDsluCounter, 136 mSDsCounter, 0 mSdLazyCounter, 349 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 158 SdHoareTripleChecker+Invalid, 363 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 349 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-18 00:47:40,939 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 158 Invalid, 363 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 349 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-18 00:47:40,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2023-02-18 00:47:40,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 78. [2023-02-18 00:47:40,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 69 states have (on average 1.1014492753623188) internal successors, (76), 70 states have internal predecessors, (76), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-02-18 00:47:40,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 87 transitions. [2023-02-18 00:47:40,955 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 87 transitions. Word has length 26 [2023-02-18 00:47:40,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:47:40,955 INFO L495 AbstractCegarLoop]: Abstraction has 78 states and 87 transitions. [2023-02-18 00:47:40,955 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 21 states have internal predecessors, (39), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-18 00:47:40,955 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 87 transitions. [2023-02-18 00:47:40,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2023-02-18 00:47:40,956 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:47:40,957 INFO L195 NwaCegarLoop]: trace histogram [44, 5, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 00:47:40,971 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-02-18 00:47:41,168 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:47:41,169 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:47:41,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:47:41,169 INFO L85 PathProgramCache]: Analyzing trace with hash 1271803231, now seen corresponding path program 2 times [2023-02-18 00:47:41,169 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:47:41,169 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1543500747] [2023-02-18 00:47:41,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:47:41,169 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:47:41,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:47:41,425 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-02-18 00:47:41,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:47:41,428 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2023-02-18 00:47:41,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:47:41,430 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2023-02-18 00:47:41,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:47:41,432 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2023-02-18 00:47:41,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:47:41,434 INFO L134 CoverageAnalysis]: Checked inductivity of 1182 backedges. 444 proven. 66 refuted. 0 times theorem prover too weak. 672 trivial. 0 not checked. [2023-02-18 00:47:41,434 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:47:41,434 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1543500747] [2023-02-18 00:47:41,434 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1543500747] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 00:47:41,435 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1633074323] [2023-02-18 00:47:41,435 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-18 00:47:41,435 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:47:41,435 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:47:41,436 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) [2023-02-18 00:47:41,478 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-02-18 00:47:41,517 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-18 00:47:41,517 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 00:47:41,518 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 22 conjunts are in the unsatisfiable core [2023-02-18 00:47:41,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 00:47:41,676 INFO L134 CoverageAnalysis]: Checked inductivity of 1182 backedges. 8 proven. 931 refuted. 0 times theorem prover too weak. 243 trivial. 0 not checked. [2023-02-18 00:47:41,676 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 00:47:41,887 INFO L134 CoverageAnalysis]: Checked inductivity of 1182 backedges. 43 proven. 896 refuted. 0 times theorem prover too weak. 243 trivial. 0 not checked. [2023-02-18 00:47:41,887 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1633074323] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 00:47:41,887 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 00:47:41,888 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 34 [2023-02-18 00:47:41,888 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [11230242] [2023-02-18 00:47:41,888 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 00:47:41,888 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-02-18 00:47:41,888 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:47:41,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-02-18 00:47:41,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=196, Invalid=926, Unknown=0, NotChecked=0, Total=1122 [2023-02-18 00:47:41,890 INFO L87 Difference]: Start difference. First operand 78 states and 87 transitions. Second operand has 34 states, 34 states have (on average 2.1470588235294117) internal successors, (73), 34 states have internal predecessors, (73), 9 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2023-02-18 00:47:45,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:47:45,614 INFO L93 Difference]: Finished difference Result 254 states and 300 transitions. [2023-02-18 00:47:45,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 136 states. [2023-02-18 00:47:45,615 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.1470588235294117) internal successors, (73), 34 states have internal predecessors, (73), 9 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Word has length 84 [2023-02-18 00:47:45,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:47:45,616 INFO L225 Difference]: With dead ends: 254 [2023-02-18 00:47:45,616 INFO L226 Difference]: Without dead ends: 179 [2023-02-18 00:47:45,622 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 312 GetRequests, 152 SyntacticMatches, 5 SemanticMatches, 155 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8852 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=3165, Invalid=21327, Unknown=0, NotChecked=0, Total=24492 [2023-02-18 00:47:45,622 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 99 mSDsluCounter, 199 mSDsCounter, 0 mSdLazyCounter, 1227 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 233 SdHoareTripleChecker+Invalid, 1265 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 1227 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-02-18 00:47:45,623 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [100 Valid, 233 Invalid, 1265 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 1227 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-02-18 00:47:45,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2023-02-18 00:47:45,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 178. [2023-02-18 00:47:45,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178 states, 163 states have (on average 1.0797546012269938) internal successors, (176), 164 states have internal predecessors, (176), 12 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2023-02-18 00:47:45,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 199 transitions. [2023-02-18 00:47:45,641 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 199 transitions. Word has length 84 [2023-02-18 00:47:45,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:47:45,641 INFO L495 AbstractCegarLoop]: Abstraction has 178 states and 199 transitions. [2023-02-18 00:47:45,641 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.1470588235294117) internal successors, (73), 34 states have internal predecessors, (73), 9 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2023-02-18 00:47:45,641 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 199 transitions. [2023-02-18 00:47:45,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 209 [2023-02-18 00:47:45,643 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:47:45,643 INFO L195 NwaCegarLoop]: trace histogram [120, 11, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 00:47:45,656 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-02-18 00:47:45,850 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:47:45,850 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:47:45,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:47:45,851 INFO L85 PathProgramCache]: Analyzing trace with hash 1147001079, now seen corresponding path program 3 times [2023-02-18 00:47:45,851 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:47:45,851 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [736693423] [2023-02-18 00:47:45,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:47:45,851 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:47:45,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:47:46,355 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2023-02-18 00:47:46,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:47:46,359 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2023-02-18 00:47:46,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:47:46,362 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2023-02-18 00:47:46,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:47:46,364 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2023-02-18 00:47:46,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:47:46,367 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2023-02-18 00:47:46,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:47:46,369 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2023-02-18 00:47:46,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:47:46,370 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 137 [2023-02-18 00:47:46,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:47:46,373 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 157 [2023-02-18 00:47:46,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:47:46,374 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 177 [2023-02-18 00:47:46,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:47:46,377 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 197 [2023-02-18 00:47:46,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:47:46,382 INFO L134 CoverageAnalysis]: Checked inductivity of 8730 backedges. 1551 proven. 78 refuted. 0 times theorem prover too weak. 7101 trivial. 0 not checked. [2023-02-18 00:47:46,382 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:47:46,382 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [736693423] [2023-02-18 00:47:46,382 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [736693423] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 00:47:46,383 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1283302143] [2023-02-18 00:47:46,383 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-18 00:47:46,383 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:47:46,383 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:47:46,384 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) [2023-02-18 00:47:46,386 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-02-18 00:47:47,176 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2023-02-18 00:47:47,176 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 00:47:47,178 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 29 conjunts are in the unsatisfiable core [2023-02-18 00:47:47,181 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 00:47:47,266 INFO L134 CoverageAnalysis]: Checked inductivity of 8730 backedges. 1603 proven. 78 refuted. 0 times theorem prover too weak. 7049 trivial. 0 not checked. [2023-02-18 00:47:47,266 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 00:47:48,052 INFO L134 CoverageAnalysis]: Checked inductivity of 8730 backedges. 1569 proven. 78 refuted. 0 times theorem prover too weak. 7083 trivial. 0 not checked. [2023-02-18 00:47:48,052 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1283302143] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 00:47:48,052 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 00:47:48,052 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 29 [2023-02-18 00:47:48,052 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [649665954] [2023-02-18 00:47:48,054 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 00:47:48,054 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-02-18 00:47:48,054 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:47:48,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-02-18 00:47:48,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=250, Invalid=562, Unknown=0, NotChecked=0, Total=812 [2023-02-18 00:47:48,056 INFO L87 Difference]: Start difference. First operand 178 states and 199 transitions. Second operand has 29 states, 29 states have (on average 1.7241379310344827) internal successors, (50), 29 states have internal predecessors, (50), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-02-18 00:47:51,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:47:51,323 INFO L93 Difference]: Finished difference Result 494 states and 676 transitions. [2023-02-18 00:47:51,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-02-18 00:47:51,324 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.7241379310344827) internal successors, (50), 29 states have internal predecessors, (50), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 208 [2023-02-18 00:47:51,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:47:51,325 INFO L225 Difference]: With dead ends: 494 [2023-02-18 00:47:51,325 INFO L226 Difference]: Without dead ends: 319 [2023-02-18 00:47:51,327 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 464 GetRequests, 411 SyntacticMatches, 13 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=626, Invalid=1096, Unknown=0, NotChecked=0, Total=1722 [2023-02-18 00:47:51,327 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 61 mSDsluCounter, 138 mSDsCounter, 0 mSdLazyCounter, 226 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 157 SdHoareTripleChecker+Invalid, 266 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 226 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2023-02-18 00:47:51,327 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [61 Valid, 157 Invalid, 266 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 226 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2023-02-18 00:47:51,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 319 states. [2023-02-18 00:47:51,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 319 to 318. [2023-02-18 00:47:51,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 318 states, 303 states have (on average 1.0429042904290429) internal successors, (316), 304 states have internal predecessors, (316), 12 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2023-02-18 00:47:51,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 318 states to 318 states and 339 transitions. [2023-02-18 00:47:51,396 INFO L78 Accepts]: Start accepts. Automaton has 318 states and 339 transitions. Word has length 208 [2023-02-18 00:47:51,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:47:51,396 INFO L495 AbstractCegarLoop]: Abstraction has 318 states and 339 transitions. [2023-02-18 00:47:51,396 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.7241379310344827) internal successors, (50), 29 states have internal predecessors, (50), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-02-18 00:47:51,396 INFO L276 IsEmpty]: Start isEmpty. Operand 318 states and 339 transitions. [2023-02-18 00:47:51,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 349 [2023-02-18 00:47:51,399 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:47:51,399 INFO L195 NwaCegarLoop]: trace histogram [260, 11, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 00:47:51,406 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-02-18 00:47:51,604 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:47:51,604 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:47:51,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:47:51,605 INFO L85 PathProgramCache]: Analyzing trace with hash 2942903, now seen corresponding path program 4 times [2023-02-18 00:47:51,605 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:47:51,605 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [702970446] [2023-02-18 00:47:51,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:47:51,605 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:47:51,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:47:52,977 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2023-02-18 00:47:52,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:47:52,980 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2023-02-18 00:47:52,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:47:52,981 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2023-02-18 00:47:52,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:47:52,983 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 133 [2023-02-18 00:47:52,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:47:52,984 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 167 [2023-02-18 00:47:52,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:47:52,985 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 201 [2023-02-18 00:47:52,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:47:52,987 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 235 [2023-02-18 00:47:52,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:47:52,988 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 269 [2023-02-18 00:47:52,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:47:52,991 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 303 [2023-02-18 00:47:52,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:47:52,993 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 337 [2023-02-18 00:47:52,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:47:53,002 INFO L134 CoverageAnalysis]: Checked inductivity of 36660 backedges. 6591 proven. 351 refuted. 0 times theorem prover too weak. 29718 trivial. 0 not checked. [2023-02-18 00:47:53,002 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:47:53,002 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [702970446] [2023-02-18 00:47:53,002 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [702970446] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 00:47:53,003 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1236394291] [2023-02-18 00:47:53,003 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-18 00:47:53,003 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:47:53,003 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:47:53,004 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) [2023-02-18 00:47:53,006 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-02-18 00:47:53,178 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-18 00:47:53,179 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 00:47:53,183 INFO L263 TraceCheckSpWp]: Trace formula consists of 976 conjuncts, 46 conjunts are in the unsatisfiable core [2023-02-18 00:47:53,188 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 00:47:53,749 INFO L134 CoverageAnalysis]: Checked inductivity of 36660 backedges. 20 proven. 33181 refuted. 0 times theorem prover too weak. 3459 trivial. 0 not checked. [2023-02-18 00:47:53,749 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 00:47:54,750 INFO L134 CoverageAnalysis]: Checked inductivity of 36660 backedges. 196 proven. 33005 refuted. 0 times theorem prover too weak. 3459 trivial. 0 not checked. [2023-02-18 00:47:54,750 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1236394291] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 00:47:54,750 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 00:47:54,751 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 24, 24] total 73 [2023-02-18 00:47:54,752 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [324270551] [2023-02-18 00:47:54,753 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 00:47:54,753 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 73 states [2023-02-18 00:47:54,754 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:47:54,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2023-02-18 00:47:54,755 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=697, Invalid=4559, Unknown=0, NotChecked=0, Total=5256 [2023-02-18 00:47:54,756 INFO L87 Difference]: Start difference. First operand 318 states and 339 transitions. Second operand has 73 states, 73 states have (on average 2.0273972602739727) internal successors, (148), 73 states have internal predecessors, (148), 21 states have call successors, (22), 2 states have call predecessors, (22), 1 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) [2023-02-18 00:49:54,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:49:54,011 INFO L93 Difference]: Finished difference Result 1016 states and 1116 transitions. [2023-02-18 00:49:54,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 628 states. [2023-02-18 00:49:54,012 INFO L78 Accepts]: Start accepts. Automaton has has 73 states, 73 states have (on average 2.0273972602739727) internal successors, (148), 73 states have internal predecessors, (148), 21 states have call successors, (22), 2 states have call predecessors, (22), 1 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) Word has length 348 [2023-02-18 00:49:54,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:49:54,014 INFO L225 Difference]: With dead ends: 1016 [2023-02-18 00:49:54,014 INFO L226 Difference]: Without dead ends: 701 [2023-02-18 00:49:54,042 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1347 GetRequests, 668 SyntacticMatches, 5 SemanticMatches, 674 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196079 ImplicationChecksByTransitivity, 106.0s TimeCoverageRelationStatistics Valid=29805, Invalid=426495, Unknown=0, NotChecked=0, Total=456300 [2023-02-18 00:49:54,043 INFO L413 NwaCegarLoop]: 58 mSDtfsCounter, 405 mSDsluCounter, 827 mSDsCounter, 0 mSdLazyCounter, 12844 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 406 SdHoareTripleChecker+Valid, 885 SdHoareTripleChecker+Invalid, 12909 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 12844 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14.5s IncrementalHoareTripleChecker+Time [2023-02-18 00:49:54,043 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [406 Valid, 885 Invalid, 12909 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 12844 Invalid, 0 Unknown, 0 Unchecked, 14.5s Time] [2023-02-18 00:49:54,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 701 states. [2023-02-18 00:49:54,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 701 to 700. [2023-02-18 00:49:54,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 700 states, 673 states have (on average 1.037147102526003) internal successors, (698), 674 states have internal predecessors, (698), 24 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (23), 23 states have call predecessors, (23), 23 states have call successors, (23) [2023-02-18 00:49:54,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 700 states to 700 states and 745 transitions. [2023-02-18 00:49:54,163 INFO L78 Accepts]: Start accepts. Automaton has 700 states and 745 transitions. Word has length 348 [2023-02-18 00:49:54,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:49:54,163 INFO L495 AbstractCegarLoop]: Abstraction has 700 states and 745 transitions. [2023-02-18 00:49:54,164 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 73 states, 73 states have (on average 2.0273972602739727) internal successors, (148), 73 states have internal predecessors, (148), 21 states have call successors, (22), 2 states have call predecessors, (22), 1 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) [2023-02-18 00:49:54,164 INFO L276 IsEmpty]: Start isEmpty. Operand 700 states and 745 transitions. [2023-02-18 00:49:54,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 779 [2023-02-18 00:49:54,173 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:49:54,173 INFO L195 NwaCegarLoop]: trace histogram [594, 23, 22, 22, 22, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 00:49:54,185 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-02-18 00:49:54,379 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:49:54,380 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:49:54,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:49:54,381 INFO L85 PathProgramCache]: Analyzing trace with hash -1313392449, now seen corresponding path program 5 times [2023-02-18 00:49:54,381 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:49:54,381 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1410596601] [2023-02-18 00:49:54,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:49:54,381 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:49:55,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:49:57,170 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2023-02-18 00:49:57,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:49:57,172 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2023-02-18 00:49:57,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:49:57,173 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2023-02-18 00:49:57,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:49:57,175 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 137 [2023-02-18 00:49:57,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:49:57,176 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 172 [2023-02-18 00:49:57,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:49:57,177 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 207 [2023-02-18 00:49:57,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:49:57,183 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 242 [2023-02-18 00:49:57,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:49:57,185 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 277 [2023-02-18 00:49:57,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:49:57,186 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 312 [2023-02-18 00:49:57,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:49:57,190 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 347 [2023-02-18 00:49:57,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:49:57,191 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 382 [2023-02-18 00:49:57,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:49:57,192 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 417 [2023-02-18 00:49:57,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:49:57,194 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 452 [2023-02-18 00:49:57,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:49:57,195 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 487 [2023-02-18 00:49:57,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:49:57,197 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 522 [2023-02-18 00:49:57,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:49:57,198 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 557 [2023-02-18 00:49:57,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:49:57,202 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 592 [2023-02-18 00:49:57,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:49:57,204 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 627 [2023-02-18 00:49:57,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:49:57,205 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 662 [2023-02-18 00:49:57,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:49:57,207 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 697 [2023-02-18 00:49:57,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:49:57,209 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 732 [2023-02-18 00:49:57,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:49:57,211 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 767 [2023-02-18 00:49:57,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:49:57,216 INFO L134 CoverageAnalysis]: Checked inductivity of 191103 backedges. 16530 proven. 378 refuted. 0 times theorem prover too weak. 174195 trivial. 0 not checked. [2023-02-18 00:49:57,216 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:49:57,217 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1410596601] [2023-02-18 00:49:57,217 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1410596601] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 00:49:57,217 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [681943942] [2023-02-18 00:49:57,217 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-18 00:49:57,217 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:49:57,217 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:49:57,218 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) [2023-02-18 00:49:57,220 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-02-18 00:53:32,569 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 15 check-sat command(s) [2023-02-18 00:53:32,569 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 00:53:32,634 INFO L263 TraceCheckSpWp]: Trace formula consists of 323 conjuncts, 57 conjunts are in the unsatisfiable core [2023-02-18 00:53:32,641 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 00:53:32,951 INFO L134 CoverageAnalysis]: Checked inductivity of 191103 backedges. 59224 proven. 378 refuted. 0 times theorem prover too weak. 131501 trivial. 0 not checked. [2023-02-18 00:53:32,951 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 00:53:33,976 INFO L134 CoverageAnalysis]: Checked inductivity of 191103 backedges. 59034 proven. 378 refuted. 0 times theorem prover too weak. 131691 trivial. 0 not checked. [2023-02-18 00:53:33,976 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [681943942] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 00:53:33,976 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 00:53:33,977 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30, 30] total 59 [2023-02-18 00:53:33,977 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [912794240] [2023-02-18 00:53:33,977 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 00:53:33,978 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2023-02-18 00:53:33,978 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:53:33,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2023-02-18 00:53:33,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=955, Invalid=2467, Unknown=0, NotChecked=0, Total=3422 [2023-02-18 00:53:33,979 INFO L87 Difference]: Start difference. First operand 700 states and 745 transitions. Second operand has 59 states, 59 states have (on average 1.3559322033898304) internal successors, (80), 59 states have internal predecessors, (80), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-02-18 00:53:50,137 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.24s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-02-18 00:53:55,644 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.07s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-02-18 00:54:50,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:54:50,821 INFO L93 Difference]: Finished difference Result 2036 states and 2764 transitions. [2023-02-18 00:54:50,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2023-02-18 00:54:50,822 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 1.3559322033898304) internal successors, (80), 59 states have internal predecessors, (80), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 778 [2023-02-18 00:54:50,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:54:50,826 INFO L225 Difference]: With dead ends: 2036 [2023-02-18 00:54:50,826 INFO L226 Difference]: Without dead ends: 1339 [2023-02-18 00:54:50,827 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1656 GetRequests, 1544 SyntacticMatches, 28 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 514 ImplicationChecksByTransitivity, 72.8s TimeCoverageRelationStatistics Valid=2548, Invalid=4762, Unknown=0, NotChecked=0, Total=7310 [2023-02-18 00:54:50,828 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 13 mSDsluCounter, 447 mSDsCounter, 0 mSdLazyCounter, 916 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 466 SdHoareTripleChecker+Invalid, 930 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 916 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.4s IncrementalHoareTripleChecker+Time [2023-02-18 00:54:50,828 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 466 Invalid, 930 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 916 Invalid, 0 Unknown, 0 Unchecked, 5.4s Time] [2023-02-18 00:54:50,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1339 states. [2023-02-18 00:54:51,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1339 to 1338. [2023-02-18 00:54:51,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1338 states, 1311 states have (on average 1.01906941266209) internal successors, (1336), 1312 states have internal predecessors, (1336), 24 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (23), 23 states have call predecessors, (23), 23 states have call successors, (23) [2023-02-18 00:54:51,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1338 states to 1338 states and 1383 transitions. [2023-02-18 00:54:51,019 INFO L78 Accepts]: Start accepts. Automaton has 1338 states and 1383 transitions. Word has length 778 [2023-02-18 00:54:51,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:54:51,021 INFO L495 AbstractCegarLoop]: Abstraction has 1338 states and 1383 transitions. [2023-02-18 00:54:51,021 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 1.3559322033898304) internal successors, (80), 59 states have internal predecessors, (80), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-02-18 00:54:51,021 INFO L276 IsEmpty]: Start isEmpty. Operand 1338 states and 1383 transitions. [2023-02-18 00:54:51,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1417 [2023-02-18 00:54:51,059 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:54:51,060 INFO L195 NwaCegarLoop]: trace histogram [1232, 23, 22, 22, 22, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 00:54:51,077 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-02-18 00:54:51,273 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,SelfDestructingSolverStorable10 [2023-02-18 00:54:51,273 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:54:51,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:54:51,273 INFO L85 PathProgramCache]: Analyzing trace with hash -689360825, now seen corresponding path program 6 times [2023-02-18 00:54:51,273 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:54:51,274 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [811043675] [2023-02-18 00:54:51,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:54:51,274 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:54:52,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:54:59,311 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2023-02-18 00:54:59,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:54:59,314 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 125 [2023-02-18 00:54:59,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:54:59,315 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 189 [2023-02-18 00:54:59,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:54:59,316 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 253 [2023-02-18 00:54:59,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:54:59,317 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 317 [2023-02-18 00:54:59,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:54:59,318 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 381 [2023-02-18 00:54:59,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:54:59,319 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 445 [2023-02-18 00:54:59,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:54:59,320 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 509 [2023-02-18 00:54:59,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:54:59,321 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 573 [2023-02-18 00:54:59,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:54:59,322 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 637 [2023-02-18 00:54:59,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:54:59,324 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 701 [2023-02-18 00:54:59,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:54:59,325 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 765 [2023-02-18 00:54:59,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:54:59,326 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 829 [2023-02-18 00:54:59,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:54:59,327 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 893 [2023-02-18 00:54:59,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:54:59,328 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 957 [2023-02-18 00:54:59,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:54:59,329 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1021 [2023-02-18 00:54:59,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:54:59,331 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1085 [2023-02-18 00:54:59,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:54:59,332 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1149 [2023-02-18 00:54:59,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:54:59,333 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1213 [2023-02-18 00:54:59,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:54:59,334 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1277 [2023-02-18 00:54:59,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:54:59,336 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1341 [2023-02-18 00:54:59,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:54:59,337 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1405 [2023-02-18 00:54:59,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:54:59,349 INFO L134 CoverageAnalysis]: Checked inductivity of 787314 backedges. 68295 proven. 1596 refuted. 0 times theorem prover too weak. 717423 trivial. 0 not checked. [2023-02-18 00:54:59,349 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:54:59,349 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [811043675] [2023-02-18 00:54:59,349 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [811043675] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 00:54:59,349 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1964162863] [2023-02-18 00:54:59,350 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-02-18 00:54:59,350 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:54:59,350 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:54:59,351 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) [2023-02-18 00:54:59,353 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process