./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-examples/standard_partition_ground-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 574ddb4e 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/array-examples/standard_partition_ground-2.i -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 fcf72d109deb69f1acda4466c7376bd6c362d474983f8a50a2faed8c0a192a76 --- Real Ultimate output --- This is Ultimate 0.2.2-?-574ddb4 [2023-02-18 09:53:49,933 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-02-18 09:53:49,935 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-02-18 09:53:49,976 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-02-18 09:53:49,977 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-02-18 09:53:49,978 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-02-18 09:53:49,979 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-02-18 09:53:49,980 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-02-18 09:53:49,981 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-02-18 09:53:49,982 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-02-18 09:53:49,983 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-02-18 09:53:49,984 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-02-18 09:53:49,984 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-02-18 09:53:49,985 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-02-18 09:53:49,986 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-02-18 09:53:49,987 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-02-18 09:53:49,987 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-02-18 09:53:49,988 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-02-18 09:53:49,995 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-02-18 09:53:50,002 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-02-18 09:53:50,007 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-02-18 09:53:50,013 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-02-18 09:53:50,015 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-02-18 09:53:50,017 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-02-18 09:53:50,019 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-02-18 09:53:50,020 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-02-18 09:53:50,020 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-02-18 09:53:50,021 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-02-18 09:53:50,022 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-02-18 09:53:50,022 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-02-18 09:53:50,023 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-02-18 09:53:50,024 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-02-18 09:53:50,025 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-02-18 09:53:50,026 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-02-18 09:53:50,032 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-02-18 09:53:50,032 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-02-18 09:53:50,033 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-02-18 09:53:50,033 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-02-18 09:53:50,033 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-02-18 09:53:50,034 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-02-18 09:53:50,035 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-02-18 09:53:50,036 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-02-18 09:53:50,064 INFO L113 SettingsManager]: Loading preferences was successful [2023-02-18 09:53:50,064 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-02-18 09:53:50,065 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-02-18 09:53:50,065 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-02-18 09:53:50,066 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-02-18 09:53:50,066 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-02-18 09:53:50,067 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-02-18 09:53:50,068 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-02-18 09:53:50,068 INFO L138 SettingsManager]: * Use SBE=true [2023-02-18 09:53:50,068 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-02-18 09:53:50,069 INFO L138 SettingsManager]: * sizeof long=4 [2023-02-18 09:53:50,069 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-02-18 09:53:50,069 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-02-18 09:53:50,069 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-02-18 09:53:50,069 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-02-18 09:53:50,070 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-02-18 09:53:50,070 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-02-18 09:53:50,070 INFO L138 SettingsManager]: * sizeof long double=12 [2023-02-18 09:53:50,070 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-02-18 09:53:50,070 INFO L138 SettingsManager]: * Use constant arrays=true [2023-02-18 09:53:50,070 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-02-18 09:53:50,071 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-02-18 09:53:50,071 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-02-18 09:53:50,071 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-02-18 09:53:50,071 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-18 09:53:50,071 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-02-18 09:53:50,071 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-02-18 09:53:50,072 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-02-18 09:53:50,072 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-02-18 09:53:50,072 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-02-18 09:53:50,072 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-02-18 09:53:50,072 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-02-18 09:53:50,073 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-02-18 09:53:50,073 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-02-18 09:53:50,073 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-02-18 09:53:50,073 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> fcf72d109deb69f1acda4466c7376bd6c362d474983f8a50a2faed8c0a192a76 [2023-02-18 09:53:50,331 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-02-18 09:53:50,357 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-02-18 09:53:50,359 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-02-18 09:53:50,360 INFO L271 PluginConnector]: Initializing CDTParser... [2023-02-18 09:53:50,360 INFO L275 PluginConnector]: CDTParser initialized [2023-02-18 09:53:50,361 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-examples/standard_partition_ground-2.i [2023-02-18 09:53:51,552 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-02-18 09:53:51,732 INFO L351 CDTParser]: Found 1 translation units. [2023-02-18 09:53:51,733 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/standard_partition_ground-2.i [2023-02-18 09:53:51,738 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6f8da1e7b/e2dcd2f0147d48c68400234f2cf0118f/FLAG0ed16cd90 [2023-02-18 09:53:51,751 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6f8da1e7b/e2dcd2f0147d48c68400234f2cf0118f [2023-02-18 09:53:51,754 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-02-18 09:53:51,755 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-02-18 09:53:51,756 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-02-18 09:53:51,757 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-02-18 09:53:51,759 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-02-18 09:53:51,760 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.02 09:53:51" (1/1) ... [2023-02-18 09:53:51,761 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@298c0abf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 09:53:51, skipping insertion in model container [2023-02-18 09:53:51,761 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.02 09:53:51" (1/1) ... [2023-02-18 09:53:51,767 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-02-18 09:53:51,782 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-02-18 09:53:51,908 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/array-examples/standard_partition_ground-2.i[820,833] [2023-02-18 09:53:51,921 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-18 09:53:51,928 INFO L203 MainTranslator]: Completed pre-run [2023-02-18 09:53:51,937 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/array-examples/standard_partition_ground-2.i[820,833] [2023-02-18 09:53:51,944 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-18 09:53:51,955 INFO L208 MainTranslator]: Completed translation [2023-02-18 09:53:51,955 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 09:53:51 WrapperNode [2023-02-18 09:53:51,955 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-02-18 09:53:51,956 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-02-18 09:53:51,956 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-02-18 09:53:51,957 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-02-18 09:53:51,962 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 09:53:51" (1/1) ... [2023-02-18 09:53:51,968 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 09:53:51" (1/1) ... [2023-02-18 09:53:51,983 INFO L138 Inliner]: procedures = 16, calls = 20, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 80 [2023-02-18 09:53:51,983 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-02-18 09:53:51,984 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-02-18 09:53:51,984 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-02-18 09:53:51,984 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-02-18 09:53:51,991 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 09:53:51" (1/1) ... [2023-02-18 09:53:51,991 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 09:53:51" (1/1) ... [2023-02-18 09:53:51,993 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 09:53:51" (1/1) ... [2023-02-18 09:53:51,993 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 09:53:51" (1/1) ... [2023-02-18 09:53:51,997 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 09:53:51" (1/1) ... [2023-02-18 09:53:52,000 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 09:53:51" (1/1) ... [2023-02-18 09:53:52,001 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 09:53:51" (1/1) ... [2023-02-18 09:53:52,001 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 09:53:51" (1/1) ... [2023-02-18 09:53:52,003 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-02-18 09:53:52,003 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-02-18 09:53:52,004 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-02-18 09:53:52,004 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-02-18 09:53:52,004 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 09:53:51" (1/1) ... [2023-02-18 09:53:52,013 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-18 09:53:52,021 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 09:53:52,038 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 09:53:52,065 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 09:53:52,081 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-02-18 09:53:52,081 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-02-18 09:53:52,081 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-02-18 09:53:52,081 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-02-18 09:53:52,082 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-02-18 09:53:52,082 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-02-18 09:53:52,082 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-02-18 09:53:52,082 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-02-18 09:53:52,144 INFO L235 CfgBuilder]: Building ICFG [2023-02-18 09:53:52,146 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2023-02-18 09:53:52,252 INFO L276 CfgBuilder]: Performing block encoding [2023-02-18 09:53:52,261 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-02-18 09:53:52,261 INFO L300 CfgBuilder]: Removed 4 assume(true) statements. [2023-02-18 09:53:52,263 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.02 09:53:52 BoogieIcfgContainer [2023-02-18 09:53:52,266 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-02-18 09:53:52,269 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-02-18 09:53:52,269 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-02-18 09:53:52,272 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-02-18 09:53:52,273 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.02 09:53:51" (1/3) ... [2023-02-18 09:53:52,273 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@287f966c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.02 09:53:52, skipping insertion in model container [2023-02-18 09:53:52,273 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 09:53:51" (2/3) ... [2023-02-18 09:53:52,274 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@287f966c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.02 09:53:52, skipping insertion in model container [2023-02-18 09:53:52,274 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.02 09:53:52" (3/3) ... [2023-02-18 09:53:52,276 INFO L112 eAbstractionObserver]: Analyzing ICFG standard_partition_ground-2.i [2023-02-18 09:53:52,292 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-02-18 09:53:52,292 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-02-18 09:53:52,333 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-02-18 09:53:52,339 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;@49fcc69c, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-02-18 09:53:52,339 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-02-18 09:53:52,344 INFO L276 IsEmpty]: Start isEmpty. Operand has 22 states, 20 states have (on average 1.6) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 09:53:52,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-02-18 09:53:52,349 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 09:53:52,349 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 09:53:52,350 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 09:53:52,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 09:53:52,354 INFO L85 PathProgramCache]: Analyzing trace with hash -700880873, now seen corresponding path program 1 times [2023-02-18 09:53:52,360 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 09:53:52,360 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [239689167] [2023-02-18 09:53:52,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 09:53:52,361 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 09:53:52,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 09:53:52,617 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 09:53:52,618 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 09:53:52,618 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [239689167] [2023-02-18 09:53:52,619 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [239689167] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 09:53:52,619 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 09:53:52,619 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-18 09:53:52,620 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [813672167] [2023-02-18 09:53:52,622 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 09:53:52,627 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-18 09:53:52,628 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 09:53:52,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-18 09:53:52,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-18 09:53:52,672 INFO L87 Difference]: Start difference. First operand has 22 states, 20 states have (on average 1.6) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 09:53:52,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 09:53:52,709 INFO L93 Difference]: Finished difference Result 42 states and 62 transitions. [2023-02-18 09:53:52,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-18 09:53:52,723 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2023-02-18 09:53:52,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 09:53:52,735 INFO L225 Difference]: With dead ends: 42 [2023-02-18 09:53:52,740 INFO L226 Difference]: Without dead ends: 20 [2023-02-18 09:53:52,743 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 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 09:53:52,750 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 1 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-18 09:53:52,765 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 48 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 09:53:52,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2023-02-18 09:53:52,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 19. [2023-02-18 09:53:52,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 18 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 09:53:52,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 24 transitions. [2023-02-18 09:53:52,822 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 24 transitions. Word has length 10 [2023-02-18 09:53:52,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 09:53:52,822 INFO L495 AbstractCegarLoop]: Abstraction has 19 states and 24 transitions. [2023-02-18 09:53:52,823 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 09:53:52,823 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 24 transitions. [2023-02-18 09:53:52,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-02-18 09:53:52,824 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 09:53:52,824 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 09:53:52,824 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-02-18 09:53:52,824 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 09:53:52,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 09:53:52,825 INFO L85 PathProgramCache]: Analyzing trace with hash 1756124227, now seen corresponding path program 1 times [2023-02-18 09:53:52,825 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 09:53:52,825 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1473630226] [2023-02-18 09:53:52,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 09:53:52,826 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 09:53:52,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 09:53:52,881 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-18 09:53:52,881 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 09:53:52,882 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1473630226] [2023-02-18 09:53:52,882 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1473630226] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 09:53:52,882 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 09:53:52,882 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-18 09:53:52,882 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1900606578] [2023-02-18 09:53:52,883 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 09:53:52,884 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-18 09:53:52,885 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 09:53:52,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-18 09:53:52,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-18 09:53:52,886 INFO L87 Difference]: Start difference. First operand 19 states and 24 transitions. Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 09:53:52,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 09:53:52,920 INFO L93 Difference]: Finished difference Result 36 states and 47 transitions. [2023-02-18 09:53:52,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-18 09:53:52,921 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2023-02-18 09:53:52,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 09:53:52,922 INFO L225 Difference]: With dead ends: 36 [2023-02-18 09:53:52,922 INFO L226 Difference]: Without dead ends: 25 [2023-02-18 09:53:52,925 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 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 09:53:52,926 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 6 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-18 09:53:52,928 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 27 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 09:53:52,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2023-02-18 09:53:52,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 21. [2023-02-18 09:53:52,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 20 states have (on average 1.3) internal successors, (26), 20 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 09:53:52,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 26 transitions. [2023-02-18 09:53:52,936 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 26 transitions. Word has length 12 [2023-02-18 09:53:52,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 09:53:52,937 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 26 transitions. [2023-02-18 09:53:52,937 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 09:53:52,937 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 26 transitions. [2023-02-18 09:53:52,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-02-18 09:53:52,939 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 09:53:52,939 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 09:53:52,939 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-02-18 09:53:52,939 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 09:53:52,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 09:53:52,941 INFO L85 PathProgramCache]: Analyzing trace with hash -1655857333, now seen corresponding path program 1 times [2023-02-18 09:53:52,941 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 09:53:52,941 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [356123581] [2023-02-18 09:53:52,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 09:53:52,942 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 09:53:52,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 09:53:53,018 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-18 09:53:53,019 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 09:53:53,019 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [356123581] [2023-02-18 09:53:53,019 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [356123581] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 09:53:53,019 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1981045869] [2023-02-18 09:53:53,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 09:53:53,020 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 09:53:53,020 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 09:53:53,023 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 09:53:53,043 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 09:53:53,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 09:53:53,089 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 3 conjunts are in the unsatisfiable core [2023-02-18 09:53:53,093 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 09:53:53,122 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-18 09:53:53,123 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 09:53:53,137 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-18 09:53:53,137 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1981045869] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 09:53:53,138 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 09:53:53,138 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2023-02-18 09:53:53,138 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1915510556] [2023-02-18 09:53:53,138 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 09:53:53,139 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-02-18 09:53:53,139 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 09:53:53,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-02-18 09:53:53,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-02-18 09:53:53,140 INFO L87 Difference]: Start difference. First operand 21 states and 26 transitions. Second operand has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 09:53:53,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 09:53:53,161 INFO L93 Difference]: Finished difference Result 43 states and 55 transitions. [2023-02-18 09:53:53,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-18 09:53:53,161 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2023-02-18 09:53:53,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 09:53:53,162 INFO L225 Difference]: With dead ends: 43 [2023-02-18 09:53:53,162 INFO L226 Difference]: Without dead ends: 27 [2023-02-18 09:53:53,163 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-02-18 09:53:53,164 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 2 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-18 09:53:53,165 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 40 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 09:53:53,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2023-02-18 09:53:53,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2023-02-18 09:53:53,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.2307692307692308) internal successors, (32), 26 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 09:53:53,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 32 transitions. [2023-02-18 09:53:53,170 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 32 transitions. Word has length 18 [2023-02-18 09:53:53,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 09:53:53,170 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 32 transitions. [2023-02-18 09:53:53,170 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 09:53:53,170 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 32 transitions. [2023-02-18 09:53:53,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-02-18 09:53:53,171 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 09:53:53,171 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 09:53:53,181 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 09:53:53,378 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 09:53:53,378 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 09:53:53,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 09:53:53,379 INFO L85 PathProgramCache]: Analyzing trace with hash 1161822033, now seen corresponding path program 2 times [2023-02-18 09:53:53,379 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 09:53:53,380 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [369566893] [2023-02-18 09:53:53,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 09:53:53,380 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 09:53:53,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 09:53:53,518 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-02-18 09:53:53,519 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 09:53:53,520 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [369566893] [2023-02-18 09:53:53,520 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [369566893] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 09:53:53,523 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [852793057] [2023-02-18 09:53:53,523 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-18 09:53:53,524 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 09:53:53,525 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 09:53:53,526 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 09:53:53,543 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 09:53:53,622 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-18 09:53:53,622 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 09:53:53,623 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 6 conjunts are in the unsatisfiable core [2023-02-18 09:53:53,624 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 09:53:53,654 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-18 09:53:53,654 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 09:53:53,713 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-18 09:53:53,714 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [852793057] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 09:53:53,714 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 09:53:53,714 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 7, 7] total 14 [2023-02-18 09:53:53,714 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1872169944] [2023-02-18 09:53:53,715 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 09:53:53,715 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-02-18 09:53:53,715 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 09:53:53,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-02-18 09:53:53,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2023-02-18 09:53:53,717 INFO L87 Difference]: Start difference. First operand 27 states and 32 transitions. Second operand has 14 states, 14 states have (on average 3.0) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 09:53:53,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 09:53:53,826 INFO L93 Difference]: Finished difference Result 65 states and 86 transitions. [2023-02-18 09:53:53,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-02-18 09:53:53,826 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2023-02-18 09:53:53,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 09:53:53,827 INFO L225 Difference]: With dead ends: 65 [2023-02-18 09:53:53,827 INFO L226 Difference]: Without dead ends: 49 [2023-02-18 09:53:53,828 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=211, Invalid=341, Unknown=0, NotChecked=0, Total=552 [2023-02-18 09:53:53,829 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 16 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-18 09:53:53,830 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 53 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 09:53:53,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2023-02-18 09:53:53,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 45. [2023-02-18 09:53:53,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 44 states have (on average 1.1818181818181819) internal successors, (52), 44 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 09:53:53,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 52 transitions. [2023-02-18 09:53:53,836 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 52 transitions. Word has length 24 [2023-02-18 09:53:53,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 09:53:53,837 INFO L495 AbstractCegarLoop]: Abstraction has 45 states and 52 transitions. [2023-02-18 09:53:53,837 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 09:53:53,837 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 52 transitions. [2023-02-18 09:53:53,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2023-02-18 09:53:53,838 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 09:53:53,838 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 09:53:53,849 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 09:53:54,044 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2023-02-18 09:53:54,044 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 09:53:54,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 09:53:54,045 INFO L85 PathProgramCache]: Analyzing trace with hash 194818197, now seen corresponding path program 3 times [2023-02-18 09:53:54,045 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 09:53:54,045 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1837413467] [2023-02-18 09:53:54,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 09:53:54,046 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 09:53:54,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 09:53:54,262 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-02-18 09:53:54,263 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 09:53:54,263 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1837413467] [2023-02-18 09:53:54,263 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1837413467] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 09:53:54,263 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [496330758] [2023-02-18 09:53:54,264 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-18 09:53:54,264 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 09:53:54,273 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 09:53:54,282 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 09:53:54,349 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 09:53:54,421 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-02-18 09:53:54,421 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 09:53:54,422 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 4 conjunts are in the unsatisfiable core [2023-02-18 09:53:54,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 09:53:54,464 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2023-02-18 09:53:54,465 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 09:53:54,502 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2023-02-18 09:53:54,503 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [496330758] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 09:53:54,503 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 09:53:54,503 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 5, 5] total 19 [2023-02-18 09:53:54,503 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1210485027] [2023-02-18 09:53:54,503 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 09:53:54,505 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-02-18 09:53:54,505 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 09:53:54,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-02-18 09:53:54,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=237, Unknown=0, NotChecked=0, Total=342 [2023-02-18 09:53:54,507 INFO L87 Difference]: Start difference. First operand 45 states and 52 transitions. Second operand has 19 states, 19 states have (on average 3.1578947368421053) internal successors, (60), 19 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 09:53:54,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 09:53:54,701 INFO L93 Difference]: Finished difference Result 94 states and 124 transitions. [2023-02-18 09:53:54,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-02-18 09:53:54,704 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.1578947368421053) internal successors, (60), 19 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2023-02-18 09:53:54,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 09:53:54,706 INFO L225 Difference]: With dead ends: 94 [2023-02-18 09:53:54,706 INFO L226 Difference]: Without dead ends: 72 [2023-02-18 09:53:54,707 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=314, Invalid=556, Unknown=0, NotChecked=0, Total=870 [2023-02-18 09:53:54,708 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 140 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 140 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 09:53:54,708 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [140 Valid, 85 Invalid, 114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 09:53:54,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2023-02-18 09:53:54,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 71. [2023-02-18 09:53:54,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 70 states have (on average 1.2285714285714286) internal successors, (86), 70 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 09:53:54,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 86 transitions. [2023-02-18 09:53:54,732 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 86 transitions. Word has length 42 [2023-02-18 09:53:54,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 09:53:54,732 INFO L495 AbstractCegarLoop]: Abstraction has 71 states and 86 transitions. [2023-02-18 09:53:54,732 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.1578947368421053) internal successors, (60), 19 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 09:53:54,733 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 86 transitions. [2023-02-18 09:53:54,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2023-02-18 09:53:54,734 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 09:53:54,734 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 09:53:54,739 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 09:53:54,937 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 09:53:54,937 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 09:53:54,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 09:53:54,938 INFO L85 PathProgramCache]: Analyzing trace with hash 515904919, now seen corresponding path program 4 times [2023-02-18 09:53:54,938 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 09:53:54,938 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1714578618] [2023-02-18 09:53:54,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 09:53:54,938 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 09:53:54,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 09:53:55,172 INFO L134 CoverageAnalysis]: Checked inductivity of 223 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2023-02-18 09:53:55,172 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 09:53:55,172 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1714578618] [2023-02-18 09:53:55,173 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1714578618] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 09:53:55,173 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1598466396] [2023-02-18 09:53:55,173 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-18 09:53:55,173 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 09:53:55,173 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 09:53:55,174 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 09:53:55,177 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 09:53:55,291 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-18 09:53:55,291 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 09:53:55,293 INFO L263 TraceCheckSpWp]: Trace formula consists of 277 conjuncts, 13 conjunts are in the unsatisfiable core [2023-02-18 09:53:55,295 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 09:53:55,389 INFO L134 CoverageAnalysis]: Checked inductivity of 223 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2023-02-18 09:53:55,389 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 09:53:55,599 INFO L134 CoverageAnalysis]: Checked inductivity of 223 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2023-02-18 09:53:55,599 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1598466396] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 09:53:55,599 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 09:53:55,600 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 27 [2023-02-18 09:53:55,600 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [913124744] [2023-02-18 09:53:55,600 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 09:53:55,601 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-02-18 09:53:55,601 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 09:53:55,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-02-18 09:53:55,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2023-02-18 09:53:55,603 INFO L87 Difference]: Start difference. First operand 71 states and 86 transitions. Second operand has 27 states, 27 states have (on average 2.4074074074074074) internal successors, (65), 27 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 09:53:55,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 09:53:55,676 INFO L93 Difference]: Finished difference Result 143 states and 185 transitions. [2023-02-18 09:53:55,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-02-18 09:53:55,677 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.4074074074074074) internal successors, (65), 27 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 68 [2023-02-18 09:53:55,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 09:53:55,678 INFO L225 Difference]: With dead ends: 143 [2023-02-18 09:53:55,678 INFO L226 Difference]: Without dead ends: 97 [2023-02-18 09:53:55,678 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 112 SyntacticMatches, 11 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2023-02-18 09:53:55,679 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 2 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 09:53:55,680 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 135 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 09:53:55,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2023-02-18 09:53:55,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 97. [2023-02-18 09:53:55,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 96 states have (on average 1.1666666666666667) internal successors, (112), 96 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 09:53:55,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 112 transitions. [2023-02-18 09:53:55,687 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 112 transitions. Word has length 68 [2023-02-18 09:53:55,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 09:53:55,687 INFO L495 AbstractCegarLoop]: Abstraction has 97 states and 112 transitions. [2023-02-18 09:53:55,688 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.4074074074074074) internal successors, (65), 27 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 09:53:55,688 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 112 transitions. [2023-02-18 09:53:55,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2023-02-18 09:53:55,690 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 09:53:55,690 INFO L195 NwaCegarLoop]: trace histogram [24, 24, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 09:53:55,704 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 09:53:55,897 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 09:53:55,897 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 09:53:55,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 09:53:55,897 INFO L85 PathProgramCache]: Analyzing trace with hash 949453489, now seen corresponding path program 5 times [2023-02-18 09:53:55,898 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 09:53:55,898 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [385387906] [2023-02-18 09:53:55,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 09:53:55,898 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 09:53:55,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 09:53:56,554 INFO L134 CoverageAnalysis]: Checked inductivity of 678 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2023-02-18 09:53:56,554 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 09:53:56,554 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [385387906] [2023-02-18 09:53:56,554 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [385387906] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 09:53:56,554 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [354839243] [2023-02-18 09:53:56,554 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-18 09:53:56,555 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 09:53:56,555 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 09:53:56,561 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 09:53:56,588 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 09:54:03,230 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 25 check-sat command(s) [2023-02-18 09:54:03,231 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 09:54:03,244 INFO L263 TraceCheckSpWp]: Trace formula consists of 394 conjuncts, 26 conjunts are in the unsatisfiable core [2023-02-18 09:54:03,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 09:54:03,543 INFO L134 CoverageAnalysis]: Checked inductivity of 678 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2023-02-18 09:54:03,544 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 09:54:04,243 INFO L134 CoverageAnalysis]: Checked inductivity of 678 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2023-02-18 09:54:04,244 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [354839243] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 09:54:04,244 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 09:54:04,244 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27, 27] total 53 [2023-02-18 09:54:04,245 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [578950279] [2023-02-18 09:54:04,245 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 09:54:04,246 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2023-02-18 09:54:04,246 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 09:54:04,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2023-02-18 09:54:04,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2023-02-18 09:54:04,249 INFO L87 Difference]: Start difference. First operand 97 states and 112 transitions. Second operand has 53 states, 53 states have (on average 2.207547169811321) internal successors, (117), 53 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 09:54:04,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 09:54:04,381 INFO L93 Difference]: Finished difference Result 195 states and 250 transitions. [2023-02-18 09:54:04,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2023-02-18 09:54:04,382 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 2.207547169811321) internal successors, (117), 53 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 94 [2023-02-18 09:54:04,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 09:54:04,386 INFO L225 Difference]: With dead ends: 195 [2023-02-18 09:54:04,386 INFO L226 Difference]: Without dead ends: 149 [2023-02-18 09:54:04,387 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 138 SyntacticMatches, 24 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 419 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2023-02-18 09:54:04,388 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 2 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 09:54:04,388 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 135 Invalid, 109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 09:54:04,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2023-02-18 09:54:04,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 149. [2023-02-18 09:54:04,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 148 states have (on average 1.1081081081081081) internal successors, (164), 148 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 09:54:04,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 164 transitions. [2023-02-18 09:54:04,414 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 164 transitions. Word has length 94 [2023-02-18 09:54:04,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 09:54:04,414 INFO L495 AbstractCegarLoop]: Abstraction has 149 states and 164 transitions. [2023-02-18 09:54:04,415 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 2.207547169811321) internal successors, (117), 53 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 09:54:04,415 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 164 transitions. [2023-02-18 09:54:04,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2023-02-18 09:54:04,422 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 09:54:04,423 INFO L195 NwaCegarLoop]: trace histogram [50, 50, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 09:54:04,435 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 09:54:04,623 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 09:54:04,624 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 09:54:04,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 09:54:04,624 INFO L85 PathProgramCache]: Analyzing trace with hash 2079151973, now seen corresponding path program 6 times [2023-02-18 09:54:04,625 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 09:54:04,625 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [898318027] [2023-02-18 09:54:04,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 09:54:04,625 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 09:54:04,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 09:54:06,530 INFO L134 CoverageAnalysis]: Checked inductivity of 2602 backedges. 0 proven. 2500 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2023-02-18 09:54:06,530 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 09:54:06,530 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [898318027] [2023-02-18 09:54:06,530 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [898318027] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 09:54:06,530 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2110597747] [2023-02-18 09:54:06,530 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-02-18 09:54:06,531 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 09:54:06,531 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 09:54:06,533 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 09:54:06,541 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 09:54:06,994 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2023-02-18 09:54:06,994 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 09:54:06,997 INFO L263 TraceCheckSpWp]: Trace formula consists of 286 conjuncts, 8 conjunts are in the unsatisfiable core [2023-02-18 09:54:07,000 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 09:54:07,175 INFO L134 CoverageAnalysis]: Checked inductivity of 2602 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 2551 trivial. 0 not checked. [2023-02-18 09:54:07,175 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 09:54:07,375 INFO L134 CoverageAnalysis]: Checked inductivity of 2602 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 2551 trivial. 0 not checked. [2023-02-18 09:54:07,376 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2110597747] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 09:54:07,376 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 09:54:07,376 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 9, 9] total 67 [2023-02-18 09:54:07,376 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1279334105] [2023-02-18 09:54:07,376 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 09:54:07,377 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2023-02-18 09:54:07,377 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 09:54:07,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2023-02-18 09:54:07,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1497, Invalid=2925, Unknown=0, NotChecked=0, Total=4422 [2023-02-18 09:54:07,380 INFO L87 Difference]: Start difference. First operand 149 states and 164 transitions. Second operand has 67 states, 67 states have (on average 2.4477611940298507) internal successors, (164), 67 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 09:54:08,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 09:54:08,612 INFO L93 Difference]: Finished difference Result 246 states and 308 transitions. [2023-02-18 09:54:08,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2023-02-18 09:54:08,613 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 67 states have (on average 2.4477611940298507) internal successors, (164), 67 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 146 [2023-02-18 09:54:08,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 09:54:08,614 INFO L225 Difference]: With dead ends: 246 [2023-02-18 09:54:08,614 INFO L226 Difference]: Without dead ends: 200 [2023-02-18 09:54:08,618 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 394 GetRequests, 278 SyntacticMatches, 0 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1975 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=4914, Invalid=8892, Unknown=0, NotChecked=0, Total=13806 [2023-02-18 09:54:08,618 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 379 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 222 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 379 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 274 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 222 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-18 09:54:08,619 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [379 Valid, 109 Invalid, 274 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 222 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-18 09:54:08,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2023-02-18 09:54:08,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 199. [2023-02-18 09:54:08,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 199 states, 198 states have (on average 1.1616161616161615) internal successors, (230), 198 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 09:54:08,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 230 transitions. [2023-02-18 09:54:08,628 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 230 transitions. Word has length 146 [2023-02-18 09:54:08,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 09:54:08,628 INFO L495 AbstractCegarLoop]: Abstraction has 199 states and 230 transitions. [2023-02-18 09:54:08,629 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 67 states, 67 states have (on average 2.4477611940298507) internal successors, (164), 67 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 09:54:08,629 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 230 transitions. [2023-02-18 09:54:08,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 197 [2023-02-18 09:54:08,630 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 09:54:08,630 INFO L195 NwaCegarLoop]: trace histogram [51, 51, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 09:54:08,637 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 09:54:08,837 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 09:54:08,838 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 09:54:08,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 09:54:08,838 INFO L85 PathProgramCache]: Analyzing trace with hash 1233622247, now seen corresponding path program 7 times [2023-02-18 09:54:08,838 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 09:54:08,838 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [58276425] [2023-02-18 09:54:08,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 09:54:08,839 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 09:54:08,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 09:54:10,668 INFO L134 CoverageAnalysis]: Checked inductivity of 3175 backedges. 0 proven. 2601 refuted. 0 times theorem prover too weak. 574 trivial. 0 not checked. [2023-02-18 09:54:10,668 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 09:54:10,668 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [58276425] [2023-02-18 09:54:10,668 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [58276425] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 09:54:10,669 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [440904592] [2023-02-18 09:54:10,669 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-02-18 09:54:10,669 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 09:54:10,669 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 09:54:10,671 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 09:54:10,673 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 09:54:10,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 09:54:10,859 INFO L263 TraceCheckSpWp]: Trace formula consists of 781 conjuncts, 53 conjunts are in the unsatisfiable core [2023-02-18 09:54:10,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 09:54:11,825 INFO L134 CoverageAnalysis]: Checked inductivity of 3175 backedges. 0 proven. 2601 refuted. 0 times theorem prover too weak. 574 trivial. 0 not checked. [2023-02-18 09:54:11,825 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 09:54:14,251 INFO L134 CoverageAnalysis]: Checked inductivity of 3175 backedges. 0 proven. 2601 refuted. 0 times theorem prover too weak. 574 trivial. 0 not checked. [2023-02-18 09:54:14,252 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [440904592] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 09:54:14,252 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 09:54:14,252 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 54, 54] total 107 [2023-02-18 09:54:14,253 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [117840523] [2023-02-18 09:54:14,253 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 09:54:14,253 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 107 states [2023-02-18 09:54:14,254 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 09:54:14,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 107 interpolants. [2023-02-18 09:54:14,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5671, Invalid=5671, Unknown=0, NotChecked=0, Total=11342 [2023-02-18 09:54:14,258 INFO L87 Difference]: Start difference. First operand 199 states and 230 transitions. Second operand has 107 states, 107 states have (on average 2.102803738317757) internal successors, (225), 107 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 09:54:14,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 09:54:14,513 INFO L93 Difference]: Finished difference Result 399 states and 513 transitions. [2023-02-18 09:54:14,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2023-02-18 09:54:14,513 INFO L78 Accepts]: Start accepts. Automaton has has 107 states, 107 states have (on average 2.102803738317757) internal successors, (225), 107 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 196 [2023-02-18 09:54:14,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 09:54:14,515 INFO L225 Difference]: With dead ends: 399 [2023-02-18 09:54:14,515 INFO L226 Difference]: Without dead ends: 305 [2023-02-18 09:54:14,517 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 444 GetRequests, 288 SyntacticMatches, 51 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1580 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=5671, Invalid=5671, Unknown=0, NotChecked=0, Total=11342 [2023-02-18 09:54:14,518 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 2 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 215 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 217 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 215 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-18 09:54:14,518 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 97 Invalid, 217 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 215 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-18 09:54:14,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 305 states. [2023-02-18 09:54:14,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 305 to 305. [2023-02-18 09:54:14,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 305 states, 304 states have (on average 1.105263157894737) internal successors, (336), 304 states have internal predecessors, (336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 09:54:14,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 336 transitions. [2023-02-18 09:54:14,528 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 336 transitions. Word has length 196 [2023-02-18 09:54:14,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 09:54:14,529 INFO L495 AbstractCegarLoop]: Abstraction has 305 states and 336 transitions. [2023-02-18 09:54:14,529 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 107 states, 107 states have (on average 2.102803738317757) internal successors, (225), 107 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 09:54:14,529 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 336 transitions. [2023-02-18 09:54:14,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 303 [2023-02-18 09:54:14,532 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 09:54:14,532 INFO L195 NwaCegarLoop]: trace histogram [104, 104, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 09:54:14,542 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 09:54:14,742 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 09:54:14,742 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 09:54:14,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 09:54:14,743 INFO L85 PathProgramCache]: Analyzing trace with hash -2006247343, now seen corresponding path program 8 times [2023-02-18 09:54:14,743 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 09:54:14,743 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [674870720] [2023-02-18 09:54:14,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 09:54:14,743 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 09:54:14,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 09:54:21,211 INFO L134 CoverageAnalysis]: Checked inductivity of 11390 backedges. 0 proven. 10816 refuted. 0 times theorem prover too weak. 574 trivial. 0 not checked. [2023-02-18 09:54:21,211 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 09:54:21,211 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [674870720] [2023-02-18 09:54:21,211 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [674870720] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 09:54:21,211 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1926187574] [2023-02-18 09:54:21,212 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-18 09:54:21,212 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 09:54:21,212 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 09:54:21,213 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 09:54:21,215 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 09:54:21,500 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-18 09:54:21,500 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 09:54:21,506 INFO L263 TraceCheckSpWp]: Trace formula consists of 1258 conjuncts, 106 conjunts are in the unsatisfiable core [2023-02-18 09:54:21,512 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 09:54:24,939 INFO L134 CoverageAnalysis]: Checked inductivity of 11390 backedges. 0 proven. 10816 refuted. 0 times theorem prover too weak. 574 trivial. 0 not checked. [2023-02-18 09:54:24,939 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 09:54:34,597 INFO L134 CoverageAnalysis]: Checked inductivity of 11390 backedges. 0 proven. 10816 refuted. 0 times theorem prover too weak. 574 trivial. 0 not checked. [2023-02-18 09:54:34,597 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1926187574] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 09:54:34,597 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 09:54:34,597 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [107, 107, 107] total 213 [2023-02-18 09:54:34,598 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1387453806] [2023-02-18 09:54:34,598 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 09:54:34,599 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 213 states [2023-02-18 09:54:34,599 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 09:54:34,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 213 interpolants. [2023-02-18 09:54:34,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22578, Invalid=22578, Unknown=0, NotChecked=0, Total=45156 [2023-02-18 09:54:34,611 INFO L87 Difference]: Start difference. First operand 305 states and 336 transitions. Second operand has 213 states, 213 states have (on average 2.051643192488263) internal successors, (437), 213 states have internal predecessors, (437), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 09:54:35,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 09:54:35,322 INFO L93 Difference]: Finished difference Result 611 states and 778 transitions. [2023-02-18 09:54:35,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 212 states. [2023-02-18 09:54:35,323 INFO L78 Accepts]: Start accepts. Automaton has has 213 states, 213 states have (on average 2.051643192488263) internal successors, (437), 213 states have internal predecessors, (437), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 302 [2023-02-18 09:54:35,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 09:54:35,325 INFO L225 Difference]: With dead ends: 611 [2023-02-18 09:54:35,325 INFO L226 Difference]: Without dead ends: 517 [2023-02-18 09:54:35,328 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 709 GetRequests, 394 SyntacticMatches, 104 SemanticMatches, 211 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5979 ImplicationChecksByTransitivity, 16.2s TimeCoverageRelationStatistics Valid=22578, Invalid=22578, Unknown=0, NotChecked=0, Total=45156 [2023-02-18 09:54:35,329 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 2 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 428 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 430 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 428 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-02-18 09:54:35,329 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 116 Invalid, 430 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 428 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-02-18 09:54:35,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 517 states. [2023-02-18 09:54:35,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 517 to 517. [2023-02-18 09:54:35,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 517 states, 516 states have (on average 1.062015503875969) internal successors, (548), 516 states have internal predecessors, (548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 09:54:35,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 517 states to 517 states and 548 transitions. [2023-02-18 09:54:35,345 INFO L78 Accepts]: Start accepts. Automaton has 517 states and 548 transitions. Word has length 302 [2023-02-18 09:54:35,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 09:54:35,345 INFO L495 AbstractCegarLoop]: Abstraction has 517 states and 548 transitions. [2023-02-18 09:54:35,346 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 213 states, 213 states have (on average 2.051643192488263) internal successors, (437), 213 states have internal predecessors, (437), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 09:54:35,346 INFO L276 IsEmpty]: Start isEmpty. Operand 517 states and 548 transitions. [2023-02-18 09:54:35,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 515 [2023-02-18 09:54:35,354 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 09:54:35,354 INFO L195 NwaCegarLoop]: trace histogram [210, 210, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 09:54:35,365 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 09:54:35,562 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-02-18 09:54:35,563 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 09:54:35,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 09:54:35,564 INFO L85 PathProgramCache]: Analyzing trace with hash 1109860773, now seen corresponding path program 9 times [2023-02-18 09:54:35,564 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 09:54:35,564 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1173432921] [2023-02-18 09:54:35,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 09:54:35,564 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 09:54:35,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 09:54:58,198 INFO L134 CoverageAnalysis]: Checked inductivity of 44674 backedges. 0 proven. 44100 refuted. 0 times theorem prover too weak. 574 trivial. 0 not checked. [2023-02-18 09:54:58,199 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 09:54:58,199 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1173432921] [2023-02-18 09:54:58,199 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1173432921] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 09:54:58,199 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1860946935] [2023-02-18 09:54:58,199 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-18 09:54:58,199 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 09:54:58,200 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 09:54:58,205 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 09:54:58,209 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-02-18 09:55:00,600 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2023-02-18 09:55:00,600 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 09:55:00,608 INFO L263 TraceCheckSpWp]: Trace formula consists of 448 conjuncts, 16 conjunts are in the unsatisfiable core [2023-02-18 09:55:00,614 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 09:55:01,668 INFO L134 CoverageAnalysis]: Checked inductivity of 44674 backedges. 0 proven. 287 refuted. 0 times theorem prover too weak. 44387 trivial. 0 not checked. [2023-02-18 09:55:01,668 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 09:55:02,885 INFO L134 CoverageAnalysis]: Checked inductivity of 44674 backedges. 0 proven. 287 refuted. 0 times theorem prover too weak. 44387 trivial. 0 not checked. [2023-02-18 09:55:02,886 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1860946935] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 09:55:02,886 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 09:55:02,886 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [213, 17, 17] total 243 [2023-02-18 09:55:02,887 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [677766765] [2023-02-18 09:55:02,887 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 09:55:02,888 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 243 states [2023-02-18 09:55:02,888 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 09:55:02,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 243 interpolants. [2023-02-18 09:55:02,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23073, Invalid=35733, Unknown=0, NotChecked=0, Total=58806 [2023-02-18 09:55:02,897 INFO L87 Difference]: Start difference. First operand 517 states and 548 transitions. Second operand has 243 states, 243 states have (on average 2.1893004115226335) internal successors, (532), 243 states have internal predecessors, (532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 09:55:19,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 09:55:19,748 INFO L93 Difference]: Finished difference Result 710 states and 836 transitions. [2023-02-18 09:55:19,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 243 states. [2023-02-18 09:55:19,749 INFO L78 Accepts]: Start accepts. Automaton has has 243 states, 243 states have (on average 2.1893004115226335) internal successors, (532), 243 states have internal predecessors, (532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 514 [2023-02-18 09:55:19,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 09:55:19,752 INFO L225 Difference]: With dead ends: 710 [2023-02-18 09:55:19,752 INFO L226 Difference]: Without dead ends: 616 [2023-02-18 09:55:19,762 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1450 GetRequests, 998 SyntacticMatches, 0 SemanticMatches, 452 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28455 ImplicationChecksByTransitivity, 29.2s TimeCoverageRelationStatistics Valid=74346, Invalid=131316, Unknown=0, NotChecked=0, Total=205662 [2023-02-18 09:55:19,763 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 2085 mSDsluCounter, 181 mSDsCounter, 0 mSdLazyCounter, 663 mSolverCounterSat, 114 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2085 SdHoareTripleChecker+Valid, 196 SdHoareTripleChecker+Invalid, 777 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 114 IncrementalHoareTripleChecker+Valid, 663 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-02-18 09:55:19,763 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2085 Valid, 196 Invalid, 777 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [114 Valid, 663 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-02-18 09:55:19,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 616 states. [2023-02-18 09:55:19,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 616 to 615. [2023-02-18 09:55:19,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 615 states, 614 states have (on average 1.1042345276872965) internal successors, (678), 614 states have internal predecessors, (678), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 09:55:19,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 615 states to 615 states and 678 transitions. [2023-02-18 09:55:19,780 INFO L78 Accepts]: Start accepts. Automaton has 615 states and 678 transitions. Word has length 514 [2023-02-18 09:55:19,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 09:55:19,781 INFO L495 AbstractCegarLoop]: Abstraction has 615 states and 678 transitions. [2023-02-18 09:55:19,781 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 243 states, 243 states have (on average 2.1893004115226335) internal successors, (532), 243 states have internal predecessors, (532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 09:55:19,782 INFO L276 IsEmpty]: Start isEmpty. Operand 615 states and 678 transitions. [2023-02-18 09:55:19,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 613 [2023-02-18 09:55:19,790 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 09:55:19,790 INFO L195 NwaCegarLoop]: trace histogram [211, 211, 30, 30, 30, 30, 30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 09:55:19,803 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-02-18 09:55:20,000 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 09:55:20,000 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 09:55:20,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 09:55:20,001 INFO L85 PathProgramCache]: Analyzing trace with hash 1095157799, now seen corresponding path program 10 times [2023-02-18 09:55:20,001 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 09:55:20,001 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1605293166] [2023-02-18 09:55:20,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 09:55:20,001 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 09:55:20,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 09:55:44,739 INFO L134 CoverageAnalysis]: Checked inductivity of 47191 backedges. 0 proven. 44521 refuted. 0 times theorem prover too weak. 2670 trivial. 0 not checked. [2023-02-18 09:55:44,740 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 09:55:44,740 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1605293166] [2023-02-18 09:55:44,740 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1605293166] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 09:55:44,740 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1504624646] [2023-02-18 09:55:44,740 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-18 09:55:44,740 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 09:55:44,741 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 09:55:44,742 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 09:55:44,743 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-02-18 09:55:51,378 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-18 09:55:51,378 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 09:55:51,398 INFO L263 TraceCheckSpWp]: Trace formula consists of 2509 conjuncts, 32 conjunts are in the unsatisfiable core [2023-02-18 09:55:51,405 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 09:55:53,871 INFO L134 CoverageAnalysis]: Checked inductivity of 47191 backedges. 0 proven. 1335 refuted. 0 times theorem prover too weak. 45856 trivial. 0 not checked. [2023-02-18 09:55:53,871 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 09:55:56,934 INFO L134 CoverageAnalysis]: Checked inductivity of 47191 backedges. 0 proven. 1335 refuted. 0 times theorem prover too weak. 45856 trivial. 0 not checked. [2023-02-18 09:55:56,934 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1504624646] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 09:55:56,934 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 09:55:56,935 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [214, 33, 33] total 276 [2023-02-18 09:55:56,935 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [834884989] [2023-02-18 09:55:56,935 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 09:55:56,936 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 276 states [2023-02-18 09:55:56,937 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 09:55:56,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 276 interpolants. [2023-02-18 09:55:56,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24806, Invalid=51094, Unknown=0, NotChecked=0, Total=75900 [2023-02-18 09:55:56,945 INFO L87 Difference]: Start difference. First operand 615 states and 678 transitions. Second operand has 276 states, 276 states have (on average 2.282608695652174) internal successors, (630), 276 states have internal predecessors, (630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 09:56:18,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 09:56:18,567 INFO L93 Difference]: Finished difference Result 1000 states and 1254 transitions. [2023-02-18 09:56:18,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 276 states. [2023-02-18 09:56:18,568 INFO L78 Accepts]: Start accepts. Automaton has has 276 states, 276 states have (on average 2.282608695652174) internal successors, (630), 276 states have internal predecessors, (630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 612 [2023-02-18 09:56:18,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 09:56:18,571 INFO L225 Difference]: With dead ends: 1000 [2023-02-18 09:56:18,572 INFO L226 Difference]: Without dead ends: 810 [2023-02-18 09:56:18,584 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1648 GetRequests, 1162 SyntacticMatches, 0 SemanticMatches, 486 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35448 ImplicationChecksByTransitivity, 33.4s TimeCoverageRelationStatistics Valid=83318, Invalid=154338, Unknown=0, NotChecked=0, Total=237656 [2023-02-18 09:56:18,585 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 2462 mSDsluCounter, 224 mSDsCounter, 0 mSdLazyCounter, 848 mSolverCounterSat, 329 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2462 SdHoareTripleChecker+Valid, 239 SdHoareTripleChecker+Invalid, 1177 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 329 IncrementalHoareTripleChecker+Valid, 848 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-02-18 09:56:18,585 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2462 Valid, 239 Invalid, 1177 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [329 Valid, 848 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-02-18 09:56:18,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 810 states. [2023-02-18 09:56:18,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 810 to 809. [2023-02-18 09:56:18,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 809 states, 808 states have (on average 1.1584158415841583) internal successors, (936), 808 states have internal predecessors, (936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 09:56:18,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 809 states to 809 states and 936 transitions. [2023-02-18 09:56:18,605 INFO L78 Accepts]: Start accepts. Automaton has 809 states and 936 transitions. Word has length 612 [2023-02-18 09:56:18,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 09:56:18,606 INFO L495 AbstractCegarLoop]: Abstraction has 809 states and 936 transitions. [2023-02-18 09:56:18,606 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 276 states, 276 states have (on average 2.282608695652174) internal successors, (630), 276 states have internal predecessors, (630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 09:56:18,607 INFO L276 IsEmpty]: Start isEmpty. Operand 809 states and 936 transitions. [2023-02-18 09:56:18,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 807 [2023-02-18 09:56:18,612 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 09:56:18,613 INFO L195 NwaCegarLoop]: trace histogram [212, 212, 62, 62, 62, 62, 62, 62, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 09:56:18,631 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-02-18 09:56:18,832 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-02-18 09:56:18,832 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 09:56:18,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 09:56:18,833 INFO L85 PathProgramCache]: Analyzing trace with hash 30316585, now seen corresponding path program 11 times [2023-02-18 09:56:18,833 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 09:56:18,833 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2096087721] [2023-02-18 09:56:18,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 09:56:18,833 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 09:56:19,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 09:56:47,252 INFO L134 CoverageAnalysis]: Checked inductivity of 56414 backedges. 0 proven. 44944 refuted. 0 times theorem prover too weak. 11470 trivial. 0 not checked. [2023-02-18 09:56:47,253 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 09:56:47,253 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2096087721] [2023-02-18 09:56:47,253 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2096087721] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 09:56:47,253 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [430906962] [2023-02-18 09:56:47,253 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-18 09:56:47,254 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 09:56:47,254 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 09:56:47,258 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 09:56:47,259 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process