./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/recursive/Addition03-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 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/recursive/Addition03-1.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 2b4726bd085117d6d28f7ec87f442bbec9d0d87c17bc39b8147695c8c5a6ec7b --- Real Ultimate output --- This is Ultimate 0.2.2-?-574ddb4 [2023-02-17 07:58:45,883 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-02-17 07:58:45,885 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-02-17 07:58:45,926 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-02-17 07:58:45,926 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-02-17 07:58:45,929 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-02-17 07:58:45,931 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-02-17 07:58:45,934 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-02-17 07:58:45,936 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-02-17 07:58:45,940 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-02-17 07:58:45,941 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-02-17 07:58:45,943 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-02-17 07:58:45,943 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-02-17 07:58:45,945 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-02-17 07:58:45,946 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-02-17 07:58:45,948 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-02-17 07:58:45,949 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-02-17 07:58:45,950 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-02-17 07:58:45,951 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-02-17 07:58:45,956 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-02-17 07:58:45,958 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-02-17 07:58:45,959 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-02-17 07:58:45,960 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-02-17 07:58:45,961 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-02-17 07:58:45,968 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-02-17 07:58:45,969 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-02-17 07:58:45,969 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-02-17 07:58:45,971 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-02-17 07:58:45,971 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-02-17 07:58:45,972 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-02-17 07:58:45,973 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-02-17 07:58:45,974 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-02-17 07:58:45,975 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-02-17 07:58:45,976 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-02-17 07:58:45,977 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-02-17 07:58:45,977 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-02-17 07:58:45,977 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-02-17 07:58:45,978 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-02-17 07:58:45,978 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-02-17 07:58:45,979 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-02-17 07:58:45,985 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-02-17 07:58:45,987 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-02-17 07:58:46,030 INFO L113 SettingsManager]: Loading preferences was successful [2023-02-17 07:58:46,030 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-02-17 07:58:46,030 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-02-17 07:58:46,031 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-02-17 07:58:46,031 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-02-17 07:58:46,031 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-02-17 07:58:46,032 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-02-17 07:58:46,032 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-02-17 07:58:46,032 INFO L138 SettingsManager]: * Use SBE=true [2023-02-17 07:58:46,032 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-02-17 07:58:46,032 INFO L138 SettingsManager]: * sizeof long=4 [2023-02-17 07:58:46,033 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-02-17 07:58:46,033 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-02-17 07:58:46,033 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-02-17 07:58:46,033 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-02-17 07:58:46,033 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-02-17 07:58:46,033 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-02-17 07:58:46,034 INFO L138 SettingsManager]: * sizeof long double=12 [2023-02-17 07:58:46,034 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-02-17 07:58:46,034 INFO L138 SettingsManager]: * Use constant arrays=true [2023-02-17 07:58:46,034 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-02-17 07:58:46,035 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-02-17 07:58:46,036 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-02-17 07:58:46,037 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-02-17 07:58:46,037 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-17 07:58:46,037 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-02-17 07:58:46,038 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-02-17 07:58:46,038 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-02-17 07:58:46,039 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-02-17 07:58:46,039 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-02-17 07:58:46,039 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-02-17 07:58:46,039 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-02-17 07:58:46,040 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-02-17 07:58:46,040 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-02-17 07:58:46,040 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-02-17 07:58:46,040 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2b4726bd085117d6d28f7ec87f442bbec9d0d87c17bc39b8147695c8c5a6ec7b [2023-02-17 07:58:46,296 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-02-17 07:58:46,313 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-02-17 07:58:46,316 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-02-17 07:58:46,317 INFO L271 PluginConnector]: Initializing CDTParser... [2023-02-17 07:58:46,318 INFO L275 PluginConnector]: CDTParser initialized [2023-02-17 07:58:46,319 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/recursive/Addition03-1.c [2023-02-17 07:58:47,448 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-02-17 07:58:47,640 INFO L351 CDTParser]: Found 1 translation units. [2023-02-17 07:58:47,641 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursive/Addition03-1.c [2023-02-17 07:58:47,650 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/855c2e5cc/f73a0921683644f6bae3c9e1ad073d81/FLAGb51ca7433 [2023-02-17 07:58:47,666 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/855c2e5cc/f73a0921683644f6bae3c9e1ad073d81 [2023-02-17 07:58:47,668 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-02-17 07:58:47,669 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-02-17 07:58:47,670 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-02-17 07:58:47,670 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-02-17 07:58:47,673 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-02-17 07:58:47,673 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.02 07:58:47" (1/1) ... [2023-02-17 07:58:47,674 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@49aa7c8a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 07:58:47, skipping insertion in model container [2023-02-17 07:58:47,675 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.02 07:58:47" (1/1) ... [2023-02-17 07:58:47,680 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-02-17 07:58:47,694 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-02-17 07:58:47,801 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursive/Addition03-1.c[840,853] [2023-02-17 07:58:47,805 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-17 07:58:47,812 INFO L203 MainTranslator]: Completed pre-run [2023-02-17 07:58:47,825 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursive/Addition03-1.c[840,853] [2023-02-17 07:58:47,826 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-17 07:58:47,836 INFO L208 MainTranslator]: Completed translation [2023-02-17 07:58:47,836 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 07:58:47 WrapperNode [2023-02-17 07:58:47,836 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-02-17 07:58:47,837 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-02-17 07:58:47,837 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-02-17 07:58:47,837 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-02-17 07:58:47,842 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 07:58:47" (1/1) ... [2023-02-17 07:58:47,848 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 07:58:47" (1/1) ... [2023-02-17 07:58:47,861 INFO L138 Inliner]: procedures = 13, calls = 10, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 26 [2023-02-17 07:58:47,862 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-02-17 07:58:47,863 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-02-17 07:58:47,863 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-02-17 07:58:47,863 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-02-17 07:58:47,869 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 07:58:47" (1/1) ... [2023-02-17 07:58:47,870 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 07:58:47" (1/1) ... [2023-02-17 07:58:47,871 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 07:58:47" (1/1) ... [2023-02-17 07:58:47,871 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 07:58:47" (1/1) ... [2023-02-17 07:58:47,873 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 07:58:47" (1/1) ... [2023-02-17 07:58:47,875 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 07:58:47" (1/1) ... [2023-02-17 07:58:47,875 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 07:58:47" (1/1) ... [2023-02-17 07:58:47,876 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 07:58:47" (1/1) ... [2023-02-17 07:58:47,877 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-02-17 07:58:47,878 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-02-17 07:58:47,878 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-02-17 07:58:47,878 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-02-17 07:58:47,879 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 07:58:47" (1/1) ... [2023-02-17 07:58:47,888 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-17 07:58:47,899 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 07:58:47,918 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) [2023-02-17 07:58:47,935 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 [2023-02-17 07:58:47,953 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-02-17 07:58:47,953 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-02-17 07:58:47,953 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-02-17 07:58:47,953 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-02-17 07:58:47,954 INFO L130 BoogieDeclarations]: Found specification of procedure addition [2023-02-17 07:58:47,955 INFO L138 BoogieDeclarations]: Found implementation of procedure addition [2023-02-17 07:58:48,003 INFO L235 CfgBuilder]: Building ICFG [2023-02-17 07:58:48,005 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2023-02-17 07:58:48,079 INFO L276 CfgBuilder]: Performing block encoding [2023-02-17 07:58:48,085 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-02-17 07:58:48,085 INFO L300 CfgBuilder]: Removed 0 assume(true) statements. [2023-02-17 07:58:48,087 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.02 07:58:48 BoogieIcfgContainer [2023-02-17 07:58:48,087 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-02-17 07:58:48,105 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-02-17 07:58:48,120 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-02-17 07:58:48,124 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-02-17 07:58:48,124 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.02 07:58:47" (1/3) ... [2023-02-17 07:58:48,125 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6dbbd81c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.02 07:58:48, skipping insertion in model container [2023-02-17 07:58:48,125 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 07:58:47" (2/3) ... [2023-02-17 07:58:48,125 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6dbbd81c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.02 07:58:48, skipping insertion in model container [2023-02-17 07:58:48,125 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.02 07:58:48" (3/3) ... [2023-02-17 07:58:48,127 INFO L112 eAbstractionObserver]: Analyzing ICFG Addition03-1.c [2023-02-17 07:58:48,158 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-02-17 07:58:48,159 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-02-17 07:58:48,227 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-02-17 07:58:48,242 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;@2e09361a, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-02-17 07:58:48,242 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-02-17 07:58:48,260 INFO L276 IsEmpty]: Start isEmpty. Operand has 20 states, 14 states have (on average 1.3571428571428572) internal successors, (19), 15 states have internal predecessors, (19), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-17 07:58:48,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-02-17 07:58:48,268 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 07:58:48,269 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 07:58:48,269 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 07:58:48,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 07:58:48,279 INFO L85 PathProgramCache]: Analyzing trace with hash -100249854, now seen corresponding path program 1 times [2023-02-17 07:58:48,287 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 07:58:48,288 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [876345006] [2023-02-17 07:58:48,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 07:58:48,289 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 07:58:48,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 07:58:48,523 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-17 07:58:48,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 07:58:48,560 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 07:58:48,561 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 07:58:48,561 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [876345006] [2023-02-17 07:58:48,562 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [876345006] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 07:58:48,562 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 07:58:48,562 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-17 07:58:48,564 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1613447232] [2023-02-17 07:58:48,564 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 07:58:48,568 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-17 07:58:48,569 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 07:58:48,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-17 07:58:48,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-02-17 07:58:48,594 INFO L87 Difference]: Start difference. First operand has 20 states, 14 states have (on average 1.3571428571428572) internal successors, (19), 15 states have internal predecessors, (19), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 5 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-17 07:58:48,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 07:58:48,705 INFO L93 Difference]: Finished difference Result 32 states and 38 transitions. [2023-02-17 07:58:48,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-02-17 07:58:48,711 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 10 [2023-02-17 07:58:48,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 07:58:48,717 INFO L225 Difference]: With dead ends: 32 [2023-02-17 07:58:48,717 INFO L226 Difference]: Without dead ends: 19 [2023-02-17 07:58:48,720 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-02-17 07:58:48,723 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 13 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-17 07:58:48,725 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 40 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-17 07:58:48,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2023-02-17 07:58:48,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2023-02-17 07:58:48,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 14 states have internal predecessors, (16), 3 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2023-02-17 07:58:48,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 24 transitions. [2023-02-17 07:58:48,754 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 24 transitions. Word has length 10 [2023-02-17 07:58:48,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 07:58:48,755 INFO L495 AbstractCegarLoop]: Abstraction has 19 states and 24 transitions. [2023-02-17 07:58:48,755 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-17 07:58:48,755 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 24 transitions. [2023-02-17 07:58:48,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-02-17 07:58:48,756 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 07:58:48,757 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 07:58:48,757 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-02-17 07:58:48,757 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 07:58:48,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 07:58:48,758 INFO L85 PathProgramCache]: Analyzing trace with hash -2083914533, now seen corresponding path program 1 times [2023-02-17 07:58:48,758 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 07:58:48,759 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1019469541] [2023-02-17 07:58:48,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 07:58:48,759 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 07:58:48,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 07:58:48,792 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-17 07:58:48,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 07:58:48,813 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 07:58:48,814 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 07:58:48,814 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1019469541] [2023-02-17 07:58:48,814 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1019469541] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 07:58:48,814 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 07:58:48,815 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-17 07:58:48,815 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [835842936] [2023-02-17 07:58:48,815 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 07:58:48,816 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-17 07:58:48,816 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 07:58:48,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-17 07:58:48,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-02-17 07:58:48,818 INFO L87 Difference]: Start difference. First operand 19 states and 24 transitions. Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-17 07:58:48,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 07:58:48,857 INFO L93 Difference]: Finished difference Result 29 states and 37 transitions. [2023-02-17 07:58:48,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-17 07:58:48,858 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2023-02-17 07:58:48,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 07:58:48,859 INFO L225 Difference]: With dead ends: 29 [2023-02-17 07:58:48,859 INFO L226 Difference]: Without dead ends: 21 [2023-02-17 07:58:48,859 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-02-17 07:58:48,861 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 8 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-17 07:58:48,861 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 31 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-17 07:58:48,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2023-02-17 07:58:48,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 19. [2023-02-17 07:58:48,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 14 states have internal predecessors, (15), 3 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2023-02-17 07:58:48,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 23 transitions. [2023-02-17 07:58:48,868 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 23 transitions. Word has length 12 [2023-02-17 07:58:48,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 07:58:48,868 INFO L495 AbstractCegarLoop]: Abstraction has 19 states and 23 transitions. [2023-02-17 07:58:48,868 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-17 07:58:48,868 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 23 transitions. [2023-02-17 07:58:48,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-02-17 07:58:48,869 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 07:58:48,870 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 07:58:48,870 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-02-17 07:58:48,870 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 07:58:48,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 07:58:48,871 INFO L85 PathProgramCache]: Analyzing trace with hash 1402250658, now seen corresponding path program 1 times [2023-02-17 07:58:48,871 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 07:58:48,871 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [209603236] [2023-02-17 07:58:48,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 07:58:48,872 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 07:58:48,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 07:58:48,937 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-17 07:58:48,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 07:58:48,992 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-17 07:58:48,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 07:58:49,017 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-17 07:58:49,018 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 07:58:49,019 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [209603236] [2023-02-17 07:58:49,019 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [209603236] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 07:58:49,019 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [773387782] [2023-02-17 07:58:49,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 07:58:49,020 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 07:58:49,020 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 07:58:49,027 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) [2023-02-17 07:58:49,029 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-02-17 07:58:49,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 07:58:49,089 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 6 conjunts are in the unsatisfiable core [2023-02-17 07:58:49,093 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 07:58:49,163 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-17 07:58:49,164 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 07:58:49,283 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-17 07:58:49,284 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [773387782] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 07:58:49,284 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 07:58:49,284 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 7] total 12 [2023-02-17 07:58:49,284 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [586940088] [2023-02-17 07:58:49,284 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 07:58:49,285 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-02-17 07:58:49,285 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 07:58:49,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-02-17 07:58:49,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2023-02-17 07:58:49,286 INFO L87 Difference]: Start difference. First operand 19 states and 23 transitions. Second operand has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 4 states have call successors, (4), 1 states have call predecessors, (4), 4 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2023-02-17 07:58:49,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 07:58:49,411 INFO L93 Difference]: Finished difference Result 54 states and 75 transitions. [2023-02-17 07:58:49,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-02-17 07:58:49,411 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 4 states have call successors, (4), 1 states have call predecessors, (4), 4 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) Word has length 17 [2023-02-17 07:58:49,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 07:58:49,413 INFO L225 Difference]: With dead ends: 54 [2023-02-17 07:58:49,413 INFO L226 Difference]: Without dead ends: 34 [2023-02-17 07:58:49,414 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 26 SyntacticMatches, 5 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=79, Invalid=161, Unknown=0, NotChecked=0, Total=240 [2023-02-17 07:58:49,415 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 31 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-17 07:58:49,415 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 60 Invalid, 131 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-17 07:58:49,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2023-02-17 07:58:49,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 32. [2023-02-17 07:58:49,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 23 states have (on average 1.2173913043478262) internal successors, (28), 23 states have internal predecessors, (28), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2023-02-17 07:58:49,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 40 transitions. [2023-02-17 07:58:49,423 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 40 transitions. Word has length 17 [2023-02-17 07:58:49,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 07:58:49,424 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 40 transitions. [2023-02-17 07:58:49,424 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 4 states have call successors, (4), 1 states have call predecessors, (4), 4 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2023-02-17 07:58:49,424 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 40 transitions. [2023-02-17 07:58:49,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2023-02-17 07:58:49,426 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 07:58:49,426 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 07:58:49,436 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-02-17 07:58:49,632 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 [2023-02-17 07:58:49,632 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 07:58:49,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 07:58:49,633 INFO L85 PathProgramCache]: Analyzing trace with hash -1901242716, now seen corresponding path program 2 times [2023-02-17 07:58:49,634 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 07:58:49,634 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1985893412] [2023-02-17 07:58:49,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 07:58:49,634 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 07:58:49,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 07:58:49,746 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-17 07:58:49,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 07:58:49,840 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-17 07:58:49,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 07:58:49,905 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-17 07:58:49,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 07:58:49,929 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-17 07:58:49,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 07:58:49,945 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-02-17 07:58:49,946 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 07:58:49,946 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1985893412] [2023-02-17 07:58:49,946 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1985893412] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 07:58:49,949 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [776530791] [2023-02-17 07:58:49,949 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-17 07:58:49,949 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 07:58:49,949 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 07:58:49,951 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) [2023-02-17 07:58:49,953 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-02-17 07:58:50,005 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-17 07:58:50,006 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-17 07:58:50,007 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 10 conjunts are in the unsatisfiable core [2023-02-17 07:58:50,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 07:58:50,064 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-02-17 07:58:50,065 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 07:58:50,257 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-02-17 07:58:50,257 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [776530791] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 07:58:50,257 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 07:58:50,257 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 11] total 16 [2023-02-17 07:58:50,259 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [952361015] [2023-02-17 07:58:50,260 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 07:58:50,261 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-02-17 07:58:50,261 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 07:58:50,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-02-17 07:58:50,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2023-02-17 07:58:50,268 INFO L87 Difference]: Start difference. First operand 32 states and 40 transitions. Second operand has 16 states, 16 states have (on average 2.25) internal successors, (36), 16 states have internal predecessors, (36), 6 states have call successors, (6), 1 states have call predecessors, (6), 6 states have return successors, (11), 6 states have call predecessors, (11), 6 states have call successors, (11) [2023-02-17 07:58:50,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 07:58:50,384 INFO L93 Difference]: Finished difference Result 46 states and 57 transitions. [2023-02-17 07:58:50,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-02-17 07:58:50,385 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.25) internal successors, (36), 16 states have internal predecessors, (36), 6 states have call successors, (6), 1 states have call predecessors, (6), 6 states have return successors, (11), 6 states have call predecessors, (11), 6 states have call successors, (11) Word has length 31 [2023-02-17 07:58:50,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 07:58:50,391 INFO L225 Difference]: With dead ends: 46 [2023-02-17 07:58:50,391 INFO L226 Difference]: Without dead ends: 40 [2023-02-17 07:58:50,392 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 52 SyntacticMatches, 9 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=153, Invalid=309, Unknown=0, NotChecked=0, Total=462 [2023-02-17 07:58:50,394 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 33 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-17 07:58:50,396 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 63 Invalid, 113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-17 07:58:50,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2023-02-17 07:58:50,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 38. [2023-02-17 07:58:50,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 27 states have (on average 1.1851851851851851) internal successors, (32), 27 states have internal predecessors, (32), 4 states have call successors, (4), 3 states have call predecessors, (4), 6 states have return successors, (10), 7 states have call predecessors, (10), 4 states have call successors, (10) [2023-02-17 07:58:50,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 46 transitions. [2023-02-17 07:58:50,420 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 46 transitions. Word has length 31 [2023-02-17 07:58:50,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 07:58:50,421 INFO L495 AbstractCegarLoop]: Abstraction has 38 states and 46 transitions. [2023-02-17 07:58:50,422 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.25) internal successors, (36), 16 states have internal predecessors, (36), 6 states have call successors, (6), 1 states have call predecessors, (6), 6 states have return successors, (11), 6 states have call predecessors, (11), 6 states have call successors, (11) [2023-02-17 07:58:50,422 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 46 transitions. [2023-02-17 07:58:50,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2023-02-17 07:58:50,425 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 07:58:50,425 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 07:58:50,434 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-02-17 07:58:50,632 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 [2023-02-17 07:58:50,632 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 07:58:50,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 07:58:50,633 INFO L85 PathProgramCache]: Analyzing trace with hash -2146751834, now seen corresponding path program 3 times [2023-02-17 07:58:50,633 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 07:58:50,633 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1711327840] [2023-02-17 07:58:50,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 07:58:50,633 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 07:58:50,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 07:58:50,699 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-17 07:58:50,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 07:58:50,798 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-17 07:58:50,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 07:58:50,920 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-17 07:58:50,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 07:58:50,962 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-17 07:58:50,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 07:58:51,005 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-17 07:58:51,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 07:58:51,042 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-17 07:58:51,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 07:58:51,066 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2023-02-17 07:58:51,068 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 07:58:51,068 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1711327840] [2023-02-17 07:58:51,070 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1711327840] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 07:58:51,070 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1217736812] [2023-02-17 07:58:51,070 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-17 07:58:51,071 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 07:58:51,071 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 07:58:51,072 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) [2023-02-17 07:58:51,075 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-02-17 07:58:51,133 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2023-02-17 07:58:51,133 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-17 07:58:51,135 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 14 conjunts are in the unsatisfiable core [2023-02-17 07:58:51,138 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 07:58:51,176 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2023-02-17 07:58:51,176 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 07:58:51,411 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 75 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-02-17 07:58:51,412 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1217736812] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 07:58:51,412 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 07:58:51,412 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 15] total 20 [2023-02-17 07:58:51,412 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [251977330] [2023-02-17 07:58:51,412 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 07:58:51,414 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-02-17 07:58:51,414 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 07:58:51,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-02-17 07:58:51,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=273, Unknown=0, NotChecked=0, Total=380 [2023-02-17 07:58:51,416 INFO L87 Difference]: Start difference. First operand 38 states and 46 transitions. Second operand has 20 states, 20 states have (on average 2.3) internal successors, (46), 20 states have internal predecessors, (46), 8 states have call successors, (8), 1 states have call predecessors, (8), 8 states have return successors, (17), 8 states have call predecessors, (17), 8 states have call successors, (17) [2023-02-17 07:58:51,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 07:58:51,565 INFO L93 Difference]: Finished difference Result 52 states and 63 transitions. [2023-02-17 07:58:51,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-02-17 07:58:51,566 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.3) internal successors, (46), 20 states have internal predecessors, (46), 8 states have call successors, (8), 1 states have call predecessors, (8), 8 states have return successors, (17), 8 states have call predecessors, (17), 8 states have call successors, (17) Word has length 45 [2023-02-17 07:58:51,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 07:58:51,569 INFO L225 Difference]: With dead ends: 52 [2023-02-17 07:58:51,569 INFO L226 Difference]: Without dead ends: 46 [2023-02-17 07:58:51,570 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 78 SyntacticMatches, 13 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=251, Invalid=505, Unknown=0, NotChecked=0, Total=756 [2023-02-17 07:58:51,570 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 65 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 143 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-17 07:58:51,571 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [73 Valid, 77 Invalid, 143 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 102 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-17 07:58:51,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2023-02-17 07:58:51,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 44. [2023-02-17 07:58:51,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 31 states have (on average 1.1612903225806452) internal successors, (36), 31 states have internal predecessors, (36), 4 states have call successors, (4), 3 states have call predecessors, (4), 8 states have return successors, (12), 9 states have call predecessors, (12), 4 states have call successors, (12) [2023-02-17 07:58:51,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 52 transitions. [2023-02-17 07:58:51,584 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 52 transitions. Word has length 45 [2023-02-17 07:58:51,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 07:58:51,584 INFO L495 AbstractCegarLoop]: Abstraction has 44 states and 52 transitions. [2023-02-17 07:58:51,585 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.3) internal successors, (46), 20 states have internal predecessors, (46), 8 states have call successors, (8), 1 states have call predecessors, (8), 8 states have return successors, (17), 8 states have call predecessors, (17), 8 states have call successors, (17) [2023-02-17 07:58:51,585 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 52 transitions. [2023-02-17 07:58:51,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2023-02-17 07:58:51,591 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 07:58:51,592 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 07:58:51,600 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-02-17 07:58:51,797 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 [2023-02-17 07:58:51,798 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 07:58:51,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 07:58:51,798 INFO L85 PathProgramCache]: Analyzing trace with hash -489684568, now seen corresponding path program 4 times [2023-02-17 07:58:51,799 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 07:58:51,799 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [699968101] [2023-02-17 07:58:51,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 07:58:51,799 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 07:58:51,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 07:58:51,954 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-17 07:58:51,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 07:58:52,047 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-17 07:58:52,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 07:58:52,106 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-17 07:58:52,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 07:58:52,163 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-17 07:58:52,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 07:58:52,202 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-17 07:58:52,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 07:58:52,235 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-17 07:58:52,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 07:58:52,259 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-17 07:58:52,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 07:58:52,279 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-17 07:58:52,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 07:58:52,297 INFO L134 CoverageAnalysis]: Checked inductivity of 175 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2023-02-17 07:58:52,297 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 07:58:52,297 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [699968101] [2023-02-17 07:58:52,298 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [699968101] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 07:58:52,298 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [376349299] [2023-02-17 07:58:52,298 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-17 07:58:52,298 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 07:58:52,298 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 07:58:52,299 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) [2023-02-17 07:58:52,330 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-02-17 07:58:52,390 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-17 07:58:52,390 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-17 07:58:52,391 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 18 conjunts are in the unsatisfiable core [2023-02-17 07:58:52,396 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 07:58:52,431 INFO L134 CoverageAnalysis]: Checked inductivity of 175 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2023-02-17 07:58:52,432 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 07:58:52,780 INFO L134 CoverageAnalysis]: Checked inductivity of 175 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-02-17 07:58:52,781 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [376349299] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 07:58:52,781 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 07:58:52,781 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 19] total 24 [2023-02-17 07:58:52,781 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1347519369] [2023-02-17 07:58:52,782 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 07:58:52,782 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-02-17 07:58:52,782 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 07:58:52,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-02-17 07:58:52,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=399, Unknown=0, NotChecked=0, Total=552 [2023-02-17 07:58:52,784 INFO L87 Difference]: Start difference. First operand 44 states and 52 transitions. Second operand has 24 states, 24 states have (on average 2.3333333333333335) internal successors, (56), 24 states have internal predecessors, (56), 10 states have call successors, (10), 1 states have call predecessors, (10), 10 states have return successors, (23), 10 states have call predecessors, (23), 10 states have call successors, (23) [2023-02-17 07:58:52,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 07:58:52,947 INFO L93 Difference]: Finished difference Result 58 states and 69 transitions. [2023-02-17 07:58:52,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-02-17 07:58:52,947 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.3333333333333335) internal successors, (56), 24 states have internal predecessors, (56), 10 states have call successors, (10), 1 states have call predecessors, (10), 10 states have return successors, (23), 10 states have call predecessors, (23), 10 states have call successors, (23) Word has length 59 [2023-02-17 07:58:52,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 07:58:52,954 INFO L225 Difference]: With dead ends: 58 [2023-02-17 07:58:52,954 INFO L226 Difference]: Without dead ends: 52 [2023-02-17 07:58:52,955 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 104 SyntacticMatches, 17 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 378 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=373, Invalid=749, Unknown=0, NotChecked=0, Total=1122 [2023-02-17 07:58:52,956 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 106 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 129 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 201 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 129 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-17 07:58:52,956 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [116 Valid, 97 Invalid, 201 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 129 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-17 07:58:52,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2023-02-17 07:58:52,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 50. [2023-02-17 07:58:52,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 35 states have (on average 1.1428571428571428) internal successors, (40), 35 states have internal predecessors, (40), 4 states have call successors, (4), 3 states have call predecessors, (4), 10 states have return successors, (14), 11 states have call predecessors, (14), 4 states have call successors, (14) [2023-02-17 07:58:52,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 58 transitions. [2023-02-17 07:58:52,969 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 58 transitions. Word has length 59 [2023-02-17 07:58:52,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 07:58:52,969 INFO L495 AbstractCegarLoop]: Abstraction has 50 states and 58 transitions. [2023-02-17 07:58:52,969 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.3333333333333335) internal successors, (56), 24 states have internal predecessors, (56), 10 states have call successors, (10), 1 states have call predecessors, (10), 10 states have return successors, (23), 10 states have call predecessors, (23), 10 states have call successors, (23) [2023-02-17 07:58:52,970 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 58 transitions. [2023-02-17 07:58:52,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2023-02-17 07:58:52,972 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 07:58:52,972 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 07:58:53,001 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-02-17 07:58:53,197 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 [2023-02-17 07:58:53,197 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 07:58:53,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 07:58:53,198 INFO L85 PathProgramCache]: Analyzing trace with hash -1199719510, now seen corresponding path program 5 times [2023-02-17 07:58:53,198 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 07:58:53,198 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2066087554] [2023-02-17 07:58:53,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 07:58:53,198 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 07:58:53,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 07:58:53,287 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-17 07:58:53,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 07:58:53,398 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-17 07:58:53,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 07:58:53,502 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-17 07:58:53,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 07:58:53,580 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-17 07:58:53,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 07:58:53,656 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-17 07:58:53,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 07:58:53,701 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-17 07:58:53,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 07:58:53,739 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-17 07:58:53,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 07:58:53,767 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-17 07:58:53,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 07:58:53,792 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-17 07:58:53,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 07:58:53,816 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-17 07:58:53,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 07:58:53,833 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 162 trivial. 0 not checked. [2023-02-17 07:58:53,833 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 07:58:53,833 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2066087554] [2023-02-17 07:58:53,834 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2066087554] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 07:58:53,834 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [807508590] [2023-02-17 07:58:53,834 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-17 07:58:53,834 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 07:58:53,834 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 07:58:53,836 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) [2023-02-17 07:58:53,838 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-02-17 07:58:53,947 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2023-02-17 07:58:53,948 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-17 07:58:53,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 22 conjunts are in the unsatisfiable core [2023-02-17 07:58:53,958 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 07:58:53,998 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 162 trivial. 0 not checked. [2023-02-17 07:58:53,998 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 07:58:54,429 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 0 proven. 243 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-02-17 07:58:54,430 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [807508590] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 07:58:54,430 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 07:58:54,430 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 23] total 28 [2023-02-17 07:58:54,430 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1250263856] [2023-02-17 07:58:54,431 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 07:58:54,431 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-02-17 07:58:54,431 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 07:58:54,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-02-17 07:58:54,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=207, Invalid=549, Unknown=0, NotChecked=0, Total=756 [2023-02-17 07:58:54,433 INFO L87 Difference]: Start difference. First operand 50 states and 58 transitions. Second operand has 28 states, 28 states have (on average 2.357142857142857) internal successors, (66), 28 states have internal predecessors, (66), 12 states have call successors, (12), 1 states have call predecessors, (12), 12 states have return successors, (29), 12 states have call predecessors, (29), 12 states have call successors, (29) [2023-02-17 07:58:54,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 07:58:54,609 INFO L93 Difference]: Finished difference Result 64 states and 75 transitions. [2023-02-17 07:58:54,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-02-17 07:58:54,609 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.357142857142857) internal successors, (66), 28 states have internal predecessors, (66), 12 states have call successors, (12), 1 states have call predecessors, (12), 12 states have return successors, (29), 12 states have call predecessors, (29), 12 states have call successors, (29) Word has length 73 [2023-02-17 07:58:54,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 07:58:54,611 INFO L225 Difference]: With dead ends: 64 [2023-02-17 07:58:54,611 INFO L226 Difference]: Without dead ends: 58 [2023-02-17 07:58:54,613 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 130 SyntacticMatches, 21 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 563 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=519, Invalid=1041, Unknown=0, NotChecked=0, Total=1560 [2023-02-17 07:58:54,613 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 120 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 135 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 226 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 135 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-17 07:58:54,614 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [132 Valid, 102 Invalid, 226 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 135 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-17 07:58:54,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2023-02-17 07:58:54,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 56. [2023-02-17 07:58:54,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 39 states have (on average 1.1282051282051282) internal successors, (44), 39 states have internal predecessors, (44), 4 states have call successors, (4), 3 states have call predecessors, (4), 12 states have return successors, (16), 13 states have call predecessors, (16), 4 states have call successors, (16) [2023-02-17 07:58:54,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 64 transitions. [2023-02-17 07:58:54,620 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 64 transitions. Word has length 73 [2023-02-17 07:58:54,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 07:58:54,620 INFO L495 AbstractCegarLoop]: Abstraction has 56 states and 64 transitions. [2023-02-17 07:58:54,621 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.357142857142857) internal successors, (66), 28 states have internal predecessors, (66), 12 states have call successors, (12), 1 states have call predecessors, (12), 12 states have return successors, (29), 12 states have call predecessors, (29), 12 states have call successors, (29) [2023-02-17 07:58:54,621 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 64 transitions. [2023-02-17 07:58:54,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2023-02-17 07:58:54,621 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 07:58:54,622 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 07:58:54,635 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-02-17 07:58:54,828 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 [2023-02-17 07:58:54,828 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 07:58:54,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 07:58:54,829 INFO L85 PathProgramCache]: Analyzing trace with hash -1560921940, now seen corresponding path program 6 times [2023-02-17 07:58:54,829 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 07:58:54,829 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1397590974] [2023-02-17 07:58:54,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 07:58:54,829 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 07:58:54,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 07:58:54,945 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-17 07:58:54,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 07:58:55,079 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-17 07:58:55,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 07:58:55,179 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-17 07:58:55,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 07:58:55,283 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-17 07:58:55,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 07:58:55,367 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-17 07:58:55,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 07:58:55,431 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-17 07:58:55,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 07:58:55,485 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-17 07:58:55,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 07:58:55,527 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-17 07:58:55,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 07:58:55,564 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-17 07:58:55,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 07:58:55,593 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-17 07:58:55,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 07:58:55,618 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-17 07:58:55,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 07:58:55,637 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-17 07:58:55,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 07:58:55,655 INFO L134 CoverageAnalysis]: Checked inductivity of 429 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 242 trivial. 0 not checked. [2023-02-17 07:58:55,655 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 07:58:55,655 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1397590974] [2023-02-17 07:58:55,656 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1397590974] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 07:58:55,656 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [176328802] [2023-02-17 07:58:55,656 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-02-17 07:58:55,656 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 07:58:55,656 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 07:58:55,661 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) [2023-02-17 07:58:55,664 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-02-17 07:58:55,835 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2023-02-17 07:58:55,835 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-17 07:58:55,837 INFO L263 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 26 conjunts are in the unsatisfiable core [2023-02-17 07:58:55,844 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 07:58:55,880 INFO L134 CoverageAnalysis]: Checked inductivity of 429 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 242 trivial. 0 not checked. [2023-02-17 07:58:55,880 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 07:58:56,448 INFO L134 CoverageAnalysis]: Checked inductivity of 429 backedges. 0 proven. 363 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2023-02-17 07:58:56,448 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [176328802] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 07:58:56,448 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 07:58:56,448 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 27] total 32 [2023-02-17 07:58:56,449 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [264054252] [2023-02-17 07:58:56,449 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 07:58:56,449 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-02-17 07:58:56,450 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 07:58:56,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-02-17 07:58:56,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=269, Invalid=723, Unknown=0, NotChecked=0, Total=992 [2023-02-17 07:58:56,451 INFO L87 Difference]: Start difference. First operand 56 states and 64 transitions. Second operand has 32 states, 32 states have (on average 2.375) internal successors, (76), 32 states have internal predecessors, (76), 14 states have call successors, (14), 1 states have call predecessors, (14), 14 states have return successors, (35), 14 states have call predecessors, (35), 14 states have call successors, (35) [2023-02-17 07:58:56,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 07:58:56,690 INFO L93 Difference]: Finished difference Result 70 states and 81 transitions. [2023-02-17 07:58:56,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-02-17 07:58:56,691 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.375) internal successors, (76), 32 states have internal predecessors, (76), 14 states have call successors, (14), 1 states have call predecessors, (14), 14 states have return successors, (35), 14 states have call predecessors, (35), 14 states have call successors, (35) Word has length 87 [2023-02-17 07:58:56,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 07:58:56,693 INFO L225 Difference]: With dead ends: 70 [2023-02-17 07:58:56,693 INFO L226 Difference]: Without dead ends: 64 [2023-02-17 07:58:56,697 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 156 SyntacticMatches, 25 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 784 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=689, Invalid=1381, Unknown=0, NotChecked=0, Total=2070 [2023-02-17 07:58:56,698 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 191 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 118 mSolverCounterSat, 115 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 205 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 233 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 115 IncrementalHoareTripleChecker+Valid, 118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-17 07:58:56,699 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [205 Valid, 119 Invalid, 233 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [115 Valid, 118 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-17 07:58:56,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2023-02-17 07:58:56,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 62. [2023-02-17 07:58:56,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 43 states have (on average 1.1162790697674418) internal successors, (48), 43 states have internal predecessors, (48), 4 states have call successors, (4), 3 states have call predecessors, (4), 14 states have return successors, (18), 15 states have call predecessors, (18), 4 states have call successors, (18) [2023-02-17 07:58:56,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 70 transitions. [2023-02-17 07:58:56,714 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 70 transitions. Word has length 87 [2023-02-17 07:58:56,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 07:58:56,716 INFO L495 AbstractCegarLoop]: Abstraction has 62 states and 70 transitions. [2023-02-17 07:58:56,716 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.375) internal successors, (76), 32 states have internal predecessors, (76), 14 states have call successors, (14), 1 states have call predecessors, (14), 14 states have return successors, (35), 14 states have call predecessors, (35), 14 states have call successors, (35) [2023-02-17 07:58:56,716 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 70 transitions. [2023-02-17 07:58:56,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2023-02-17 07:58:56,718 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 07:58:56,718 INFO L195 NwaCegarLoop]: trace histogram [14, 14, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 07:58:56,727 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-02-17 07:58:56,924 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 [2023-02-17 07:58:56,925 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 07:58:56,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 07:58:56,925 INFO L85 PathProgramCache]: Analyzing trace with hash 1048271022, now seen corresponding path program 7 times [2023-02-17 07:58:56,925 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 07:58:56,925 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1012564369] [2023-02-17 07:58:56,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 07:58:56,925 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 07:58:56,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 07:58:57,089 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-17 07:58:57,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 07:58:57,238 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-17 07:58:57,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 07:58:57,393 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-17 07:58:57,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 07:58:57,524 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-17 07:58:57,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 07:58:57,626 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-17 07:58:57,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 07:58:57,726 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-17 07:58:57,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 07:58:57,824 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-17 07:58:57,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 07:58:57,896 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-17 07:58:57,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 07:58:57,947 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-17 07:58:57,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 07:58:57,990 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-17 07:58:57,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 07:58:58,025 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-17 07:58:58,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 07:58:58,057 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-17 07:58:58,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 07:58:58,085 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-17 07:58:58,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 07:58:58,118 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-17 07:58:58,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 07:58:58,140 INFO L134 CoverageAnalysis]: Checked inductivity of 598 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 338 trivial. 0 not checked. [2023-02-17 07:58:58,140 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 07:58:58,140 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1012564369] [2023-02-17 07:58:58,140 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1012564369] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 07:58:58,141 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1210066411] [2023-02-17 07:58:58,141 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-02-17 07:58:58,141 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 07:58:58,141 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 07:58:58,142 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) [2023-02-17 07:58:58,168 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-02-17 07:58:58,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 07:58:58,398 INFO L263 TraceCheckSpWp]: Trace formula consists of 301 conjuncts, 30 conjunts are in the unsatisfiable core [2023-02-17 07:58:58,400 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 07:58:58,436 INFO L134 CoverageAnalysis]: Checked inductivity of 598 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 338 trivial. 0 not checked. [2023-02-17 07:58:58,437 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 07:58:59,236 INFO L134 CoverageAnalysis]: Checked inductivity of 598 backedges. 0 proven. 507 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2023-02-17 07:58:59,236 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1210066411] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 07:58:59,237 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 07:58:59,237 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 31] total 36 [2023-02-17 07:58:59,239 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [529895780] [2023-02-17 07:58:59,239 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 07:58:59,239 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2023-02-17 07:58:59,240 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 07:58:59,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2023-02-17 07:58:59,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=339, Invalid=921, Unknown=0, NotChecked=0, Total=1260 [2023-02-17 07:58:59,242 INFO L87 Difference]: Start difference. First operand 62 states and 70 transitions. Second operand has 36 states, 36 states have (on average 2.388888888888889) internal successors, (86), 36 states have internal predecessors, (86), 16 states have call successors, (16), 1 states have call predecessors, (16), 16 states have return successors, (41), 16 states have call predecessors, (41), 16 states have call successors, (41) [2023-02-17 07:58:59,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 07:58:59,447 INFO L93 Difference]: Finished difference Result 76 states and 87 transitions. [2023-02-17 07:58:59,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-02-17 07:58:59,447 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.388888888888889) internal successors, (86), 36 states have internal predecessors, (86), 16 states have call successors, (16), 1 states have call predecessors, (16), 16 states have return successors, (41), 16 states have call predecessors, (41), 16 states have call successors, (41) Word has length 101 [2023-02-17 07:58:59,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 07:58:59,448 INFO L225 Difference]: With dead ends: 76 [2023-02-17 07:58:59,449 INFO L226 Difference]: Without dead ends: 70 [2023-02-17 07:58:59,450 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 261 GetRequests, 182 SyntacticMatches, 29 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1041 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=883, Invalid=1769, Unknown=0, NotChecked=0, Total=2652 [2023-02-17 07:58:59,452 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 136 mSDsluCounter, 121 mSDsCounter, 0 mSdLazyCounter, 140 mSolverCounterSat, 97 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 152 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 237 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-17 07:58:59,453 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [152 Valid, 134 Invalid, 237 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 140 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-17 07:58:59,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2023-02-17 07:58:59,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 68. [2023-02-17 07:58:59,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 47 states have (on average 1.1063829787234043) internal successors, (52), 47 states have internal predecessors, (52), 4 states have call successors, (4), 3 states have call predecessors, (4), 16 states have return successors, (20), 17 states have call predecessors, (20), 4 states have call successors, (20) [2023-02-17 07:58:59,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 76 transitions. [2023-02-17 07:58:59,465 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 76 transitions. Word has length 101 [2023-02-17 07:58:59,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 07:58:59,466 INFO L495 AbstractCegarLoop]: Abstraction has 68 states and 76 transitions. [2023-02-17 07:58:59,466 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.388888888888889) internal successors, (86), 36 states have internal predecessors, (86), 16 states have call successors, (16), 1 states have call predecessors, (16), 16 states have return successors, (41), 16 states have call predecessors, (41), 16 states have call successors, (41) [2023-02-17 07:58:59,466 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 76 transitions. [2023-02-17 07:58:59,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2023-02-17 07:58:59,471 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 07:58:59,472 INFO L195 NwaCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 07:58:59,481 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-02-17 07:58:59,681 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 [2023-02-17 07:58:59,681 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 07:58:59,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 07:58:59,682 INFO L85 PathProgramCache]: Analyzing trace with hash 2075065264, now seen corresponding path program 8 times [2023-02-17 07:58:59,682 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 07:58:59,682 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [361622260] [2023-02-17 07:58:59,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 07:58:59,683 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 07:58:59,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 07:58:59,857 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-17 07:58:59,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 07:59:00,019 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-17 07:59:00,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 07:59:00,179 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-17 07:59:00,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 07:59:00,303 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-17 07:59:00,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 07:59:00,409 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-17 07:59:00,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 07:59:00,527 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-17 07:59:00,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 07:59:00,608 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-17 07:59:00,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 07:59:00,683 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-17 07:59:00,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 07:59:00,746 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-17 07:59:00,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 07:59:00,803 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-17 07:59:00,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 07:59:00,855 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-17 07:59:00,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 07:59:00,896 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-17 07:59:00,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 07:59:00,931 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-17 07:59:00,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 07:59:00,960 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-17 07:59:00,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 07:59:00,984 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-17 07:59:00,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 07:59:01,004 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-17 07:59:01,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 07:59:01,027 INFO L134 CoverageAnalysis]: Checked inductivity of 795 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 450 trivial. 0 not checked. [2023-02-17 07:59:01,027 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 07:59:01,027 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [361622260] [2023-02-17 07:59:01,027 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [361622260] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 07:59:01,027 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [959917381] [2023-02-17 07:59:01,028 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-17 07:59:01,028 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 07:59:01,028 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 07:59:01,029 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) [2023-02-17 07:59:01,052 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-02-17 07:59:01,446 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-17 07:59:01,447 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-17 07:59:01,449 INFO L263 TraceCheckSpWp]: Trace formula consists of 339 conjuncts, 34 conjunts are in the unsatisfiable core [2023-02-17 07:59:01,451 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 07:59:01,487 INFO L134 CoverageAnalysis]: Checked inductivity of 795 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 450 trivial. 0 not checked. [2023-02-17 07:59:01,488 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 07:59:02,645 INFO L134 CoverageAnalysis]: Checked inductivity of 795 backedges. 0 proven. 675 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2023-02-17 07:59:02,645 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [959917381] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 07:59:02,646 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 07:59:02,646 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 35] total 40 [2023-02-17 07:59:02,646 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [704960079] [2023-02-17 07:59:02,646 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 07:59:02,648 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2023-02-17 07:59:02,648 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 07:59:02,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2023-02-17 07:59:02,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=417, Invalid=1143, Unknown=0, NotChecked=0, Total=1560 [2023-02-17 07:59:02,650 INFO L87 Difference]: Start difference. First operand 68 states and 76 transitions. Second operand has 40 states, 40 states have (on average 2.4) internal successors, (96), 40 states have internal predecessors, (96), 18 states have call successors, (18), 1 states have call predecessors, (18), 18 states have return successors, (47), 18 states have call predecessors, (47), 18 states have call successors, (47) [2023-02-17 07:59:02,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 07:59:02,905 INFO L93 Difference]: Finished difference Result 82 states and 93 transitions. [2023-02-17 07:59:02,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-02-17 07:59:02,905 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.4) internal successors, (96), 40 states have internal predecessors, (96), 18 states have call successors, (18), 1 states have call predecessors, (18), 18 states have return successors, (47), 18 states have call predecessors, (47), 18 states have call successors, (47) Word has length 115 [2023-02-17 07:59:02,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 07:59:02,906 INFO L225 Difference]: With dead ends: 82 [2023-02-17 07:59:02,906 INFO L226 Difference]: Without dead ends: 76 [2023-02-17 07:59:02,908 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 297 GetRequests, 208 SyntacticMatches, 33 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1334 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1101, Invalid=2205, Unknown=0, NotChecked=0, Total=3306 [2023-02-17 07:59:02,909 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 194 mSDsluCounter, 134 mSDsCounter, 0 mSdLazyCounter, 145 mSolverCounterSat, 107 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 212 SdHoareTripleChecker+Valid, 147 SdHoareTripleChecker+Invalid, 252 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 107 IncrementalHoareTripleChecker+Valid, 145 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-17 07:59:02,909 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [212 Valid, 147 Invalid, 252 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [107 Valid, 145 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-17 07:59:02,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2023-02-17 07:59:02,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 74. [2023-02-17 07:59:02,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 51 states have (on average 1.0980392156862746) internal successors, (56), 51 states have internal predecessors, (56), 4 states have call successors, (4), 3 states have call predecessors, (4), 18 states have return successors, (22), 19 states have call predecessors, (22), 4 states have call successors, (22) [2023-02-17 07:59:02,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 82 transitions. [2023-02-17 07:59:02,913 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 82 transitions. Word has length 115 [2023-02-17 07:59:02,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 07:59:02,913 INFO L495 AbstractCegarLoop]: Abstraction has 74 states and 82 transitions. [2023-02-17 07:59:02,914 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 2.4) internal successors, (96), 40 states have internal predecessors, (96), 18 states have call successors, (18), 1 states have call predecessors, (18), 18 states have return successors, (47), 18 states have call predecessors, (47), 18 states have call successors, (47) [2023-02-17 07:59:02,914 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 82 transitions. [2023-02-17 07:59:02,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2023-02-17 07:59:02,915 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 07:59:02,915 INFO L195 NwaCegarLoop]: trace histogram [18, 18, 17, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 07:59:02,925 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-02-17 07:59:03,123 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 [2023-02-17 07:59:03,124 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 07:59:03,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 07:59:03,124 INFO L85 PathProgramCache]: Analyzing trace with hash -107806286, now seen corresponding path program 9 times [2023-02-17 07:59:03,124 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 07:59:03,125 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [138310877] [2023-02-17 07:59:03,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 07:59:03,125 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 07:59:03,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 07:59:03,324 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-17 07:59:03,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 07:59:03,493 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-17 07:59:03,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 07:59:03,655 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-17 07:59:03,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 07:59:03,826 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-17 07:59:03,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 07:59:03,969 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-17 07:59:03,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 07:59:04,088 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-17 07:59:04,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 07:59:04,197 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-17 07:59:04,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 07:59:04,317 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-17 07:59:04,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 07:59:04,418 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-17 07:59:04,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 07:59:04,499 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-17 07:59:04,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 07:59:04,588 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-17 07:59:04,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 07:59:04,656 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-17 07:59:04,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 07:59:04,715 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-17 07:59:04,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 07:59:04,754 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-17 07:59:04,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 07:59:04,790 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-17 07:59:04,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 07:59:04,819 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-17 07:59:04,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 07:59:04,854 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-17 07:59:04,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 07:59:04,876 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-17 07:59:04,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 07:59:04,900 INFO L134 CoverageAnalysis]: Checked inductivity of 1020 backedges. 0 proven. 442 refuted. 0 times theorem prover too weak. 578 trivial. 0 not checked. [2023-02-17 07:59:04,900 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 07:59:04,901 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [138310877] [2023-02-17 07:59:04,901 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [138310877] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 07:59:04,901 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1965697002] [2023-02-17 07:59:04,901 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-17 07:59:04,901 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 07:59:04,901 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 07:59:04,905 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) [2023-02-17 07:59:04,908 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-02-17 07:59:05,557 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2023-02-17 07:59:05,558 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-17 07:59:05,560 INFO L263 TraceCheckSpWp]: Trace formula consists of 377 conjuncts, 38 conjunts are in the unsatisfiable core [2023-02-17 07:59:05,563 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 07:59:05,603 INFO L134 CoverageAnalysis]: Checked inductivity of 1020 backedges. 0 proven. 442 refuted. 0 times theorem prover too weak. 578 trivial. 0 not checked. [2023-02-17 07:59:05,603 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 07:59:07,060 INFO L134 CoverageAnalysis]: Checked inductivity of 1020 backedges. 0 proven. 867 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2023-02-17 07:59:07,061 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1965697002] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 07:59:07,061 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 07:59:07,061 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 39] total 44 [2023-02-17 07:59:07,062 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1873593100] [2023-02-17 07:59:07,062 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 07:59:07,064 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2023-02-17 07:59:07,064 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 07:59:07,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2023-02-17 07:59:07,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=503, Invalid=1389, Unknown=0, NotChecked=0, Total=1892 [2023-02-17 07:59:07,068 INFO L87 Difference]: Start difference. First operand 74 states and 82 transitions. Second operand has 44 states, 44 states have (on average 2.409090909090909) internal successors, (106), 44 states have internal predecessors, (106), 20 states have call successors, (20), 1 states have call predecessors, (20), 20 states have return successors, (53), 20 states have call predecessors, (53), 20 states have call successors, (53) [2023-02-17 07:59:07,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 07:59:07,338 INFO L93 Difference]: Finished difference Result 88 states and 99 transitions. [2023-02-17 07:59:07,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-02-17 07:59:07,338 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 2.409090909090909) internal successors, (106), 44 states have internal predecessors, (106), 20 states have call successors, (20), 1 states have call predecessors, (20), 20 states have return successors, (53), 20 states have call predecessors, (53), 20 states have call successors, (53) Word has length 129 [2023-02-17 07:59:07,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 07:59:07,339 INFO L225 Difference]: With dead ends: 88 [2023-02-17 07:59:07,340 INFO L226 Difference]: Without dead ends: 82 [2023-02-17 07:59:07,341 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 333 GetRequests, 234 SyntacticMatches, 37 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1663 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1343, Invalid=2689, Unknown=0, NotChecked=0, Total=4032 [2023-02-17 07:59:07,342 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 250 mSDsluCounter, 159 mSDsCounter, 0 mSdLazyCounter, 179 mSolverCounterSat, 141 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 270 SdHoareTripleChecker+Valid, 172 SdHoareTripleChecker+Invalid, 320 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 141 IncrementalHoareTripleChecker+Valid, 179 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-17 07:59:07,342 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [270 Valid, 172 Invalid, 320 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [141 Valid, 179 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-17 07:59:07,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2023-02-17 07:59:07,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 80. [2023-02-17 07:59:07,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 55 states have (on average 1.0909090909090908) internal successors, (60), 55 states have internal predecessors, (60), 4 states have call successors, (4), 3 states have call predecessors, (4), 20 states have return successors, (24), 21 states have call predecessors, (24), 4 states have call successors, (24) [2023-02-17 07:59:07,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 88 transitions. [2023-02-17 07:59:07,347 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 88 transitions. Word has length 129 [2023-02-17 07:59:07,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 07:59:07,347 INFO L495 AbstractCegarLoop]: Abstraction has 80 states and 88 transitions. [2023-02-17 07:59:07,348 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 2.409090909090909) internal successors, (106), 44 states have internal predecessors, (106), 20 states have call successors, (20), 1 states have call predecessors, (20), 20 states have return successors, (53), 20 states have call predecessors, (53), 20 states have call successors, (53) [2023-02-17 07:59:07,348 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 88 transitions. [2023-02-17 07:59:07,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2023-02-17 07:59:07,349 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 07:59:07,349 INFO L195 NwaCegarLoop]: trace histogram [20, 20, 19, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 07:59:07,361 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-02-17 07:59:07,559 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 [2023-02-17 07:59:07,559 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 07:59:07,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 07:59:07,559 INFO L85 PathProgramCache]: Analyzing trace with hash 1602833076, now seen corresponding path program 10 times [2023-02-17 07:59:07,559 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 07:59:07,560 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1251854980] [2023-02-17 07:59:07,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 07:59:07,560 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 07:59:07,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 07:59:07,833 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-17 07:59:07,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 07:59:08,117 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-17 07:59:08,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 07:59:08,371 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-17 07:59:08,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 07:59:08,597 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-17 07:59:08,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 07:59:08,767 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-17 07:59:08,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 07:59:08,952 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-17 07:59:08,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 07:59:09,108 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-17 07:59:09,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 07:59:09,235 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-17 07:59:09,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 07:59:09,347 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-17 07:59:09,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 07:59:09,442 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-17 07:59:09,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 07:59:09,523 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-17 07:59:09,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 07:59:09,593 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-17 07:59:09,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 07:59:09,656 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-17 07:59:09,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 07:59:09,713 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-17 07:59:09,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 07:59:09,760 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-17 07:59:09,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 07:59:09,800 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-17 07:59:09,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 07:59:09,834 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-17 07:59:09,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 07:59:09,863 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-17 07:59:09,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 07:59:09,888 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-17 07:59:09,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 07:59:09,910 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-17 07:59:09,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 07:59:09,933 INFO L134 CoverageAnalysis]: Checked inductivity of 1273 backedges. 0 proven. 551 refuted. 0 times theorem prover too weak. 722 trivial. 0 not checked. [2023-02-17 07:59:09,934 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 07:59:09,934 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1251854980] [2023-02-17 07:59:09,934 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1251854980] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 07:59:09,934 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [180257638] [2023-02-17 07:59:09,934 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-17 07:59:09,935 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 07:59:09,935 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 07:59:09,937 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) [2023-02-17 07:59:09,969 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-02-17 07:59:10,699 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-17 07:59:10,699 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-17 07:59:10,702 INFO L263 TraceCheckSpWp]: Trace formula consists of 415 conjuncts, 42 conjunts are in the unsatisfiable core [2023-02-17 07:59:10,705 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 07:59:10,746 INFO L134 CoverageAnalysis]: Checked inductivity of 1273 backedges. 0 proven. 551 refuted. 0 times theorem prover too weak. 722 trivial. 0 not checked. [2023-02-17 07:59:10,746 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 07:59:12,667 INFO L134 CoverageAnalysis]: Checked inductivity of 1273 backedges. 0 proven. 1083 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2023-02-17 07:59:12,668 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [180257638] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 07:59:12,668 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 07:59:12,668 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 43] total 48 [2023-02-17 07:59:12,668 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [384382283] [2023-02-17 07:59:12,668 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 07:59:12,669 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2023-02-17 07:59:12,669 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 07:59:12,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2023-02-17 07:59:12,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=597, Invalid=1659, Unknown=0, NotChecked=0, Total=2256 [2023-02-17 07:59:12,671 INFO L87 Difference]: Start difference. First operand 80 states and 88 transitions. Second operand has 48 states, 48 states have (on average 2.4166666666666665) internal successors, (116), 48 states have internal predecessors, (116), 22 states have call successors, (22), 1 states have call predecessors, (22), 22 states have return successors, (59), 22 states have call predecessors, (59), 22 states have call successors, (59) [2023-02-17 07:59:12,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 07:59:12,975 INFO L93 Difference]: Finished difference Result 94 states and 105 transitions. [2023-02-17 07:59:12,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-02-17 07:59:12,976 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 2.4166666666666665) internal successors, (116), 48 states have internal predecessors, (116), 22 states have call successors, (22), 1 states have call predecessors, (22), 22 states have return successors, (59), 22 states have call predecessors, (59), 22 states have call successors, (59) Word has length 143 [2023-02-17 07:59:12,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 07:59:12,977 INFO L225 Difference]: With dead ends: 94 [2023-02-17 07:59:12,977 INFO L226 Difference]: Without dead ends: 88 [2023-02-17 07:59:12,979 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 369 GetRequests, 260 SyntacticMatches, 41 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2028 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1609, Invalid=3221, Unknown=0, NotChecked=0, Total=4830 [2023-02-17 07:59:12,980 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 150 mSDsluCounter, 154 mSDsCounter, 0 mSdLazyCounter, 162 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 172 SdHoareTripleChecker+Valid, 167 SdHoareTripleChecker+Invalid, 247 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 162 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-17 07:59:12,980 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [172 Valid, 167 Invalid, 247 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 162 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-17 07:59:12,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2023-02-17 07:59:12,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 86. [2023-02-17 07:59:12,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 59 states have (on average 1.0847457627118644) internal successors, (64), 59 states have internal predecessors, (64), 4 states have call successors, (4), 3 states have call predecessors, (4), 22 states have return successors, (26), 23 states have call predecessors, (26), 4 states have call successors, (26) [2023-02-17 07:59:12,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 94 transitions. [2023-02-17 07:59:12,986 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 94 transitions. Word has length 143 [2023-02-17 07:59:12,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 07:59:12,987 INFO L495 AbstractCegarLoop]: Abstraction has 86 states and 94 transitions. [2023-02-17 07:59:12,988 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 2.4166666666666665) internal successors, (116), 48 states have internal predecessors, (116), 22 states have call successors, (22), 1 states have call predecessors, (22), 22 states have return successors, (59), 22 states have call predecessors, (59), 22 states have call successors, (59) [2023-02-17 07:59:12,988 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 94 transitions. [2023-02-17 07:59:12,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2023-02-17 07:59:12,990 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 07:59:12,990 INFO L195 NwaCegarLoop]: trace histogram [22, 22, 21, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 07:59:13,003 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-02-17 07:59:13,200 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 [2023-02-17 07:59:13,201 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 07:59:13,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 07:59:13,201 INFO L85 PathProgramCache]: Analyzing trace with hash -1219250506, now seen corresponding path program 11 times [2023-02-17 07:59:13,201 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 07:59:13,201 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [42158686] [2023-02-17 07:59:13,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 07:59:13,201 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 07:59:13,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 07:59:13,511 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-17 07:59:13,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 07:59:13,897 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-17 07:59:13,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 07:59:14,153 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-17 07:59:14,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 07:59:14,376 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-17 07:59:14,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 07:59:14,623 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-17 07:59:14,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 07:59:14,807 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-17 07:59:14,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 07:59:14,967 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-17 07:59:14,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 07:59:15,110 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-17 07:59:15,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 07:59:15,245 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-17 07:59:15,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 07:59:15,359 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-17 07:59:15,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 07:59:15,457 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-17 07:59:15,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 07:59:15,585 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-17 07:59:15,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 07:59:15,663 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-17 07:59:15,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 07:59:15,730 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-17 07:59:15,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 07:59:15,789 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-17 07:59:15,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 07:59:15,839 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-17 07:59:15,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 07:59:15,882 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-17 07:59:15,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 07:59:15,918 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-17 07:59:15,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 07:59:15,954 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-17 07:59:15,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 07:59:15,982 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-17 07:59:15,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 07:59:16,006 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-17 07:59:16,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 07:59:16,030 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-17 07:59:16,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 07:59:16,053 INFO L134 CoverageAnalysis]: Checked inductivity of 1554 backedges. 0 proven. 672 refuted. 0 times theorem prover too weak. 882 trivial. 0 not checked. [2023-02-17 07:59:16,054 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 07:59:16,054 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [42158686] [2023-02-17 07:59:16,054 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [42158686] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 07:59:16,054 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1757539399] [2023-02-17 07:59:16,054 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-17 07:59:16,054 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 07:59:16,055 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 07:59:16,057 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) [2023-02-17 07:59:16,084 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-02-17 07:59:17,077 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 22 check-sat command(s) [2023-02-17 07:59:17,077 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-17 07:59:17,080 INFO L263 TraceCheckSpWp]: Trace formula consists of 453 conjuncts, 46 conjunts are in the unsatisfiable core [2023-02-17 07:59:17,083 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 07:59:17,128 INFO L134 CoverageAnalysis]: Checked inductivity of 1554 backedges. 0 proven. 672 refuted. 0 times theorem prover too weak. 882 trivial. 0 not checked. [2023-02-17 07:59:17,129 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 07:59:19,505 INFO L134 CoverageAnalysis]: Checked inductivity of 1554 backedges. 0 proven. 1323 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2023-02-17 07:59:19,506 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1757539399] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 07:59:19,506 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 07:59:19,506 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26, 47] total 52 [2023-02-17 07:59:19,507 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1294763319] [2023-02-17 07:59:19,507 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 07:59:19,508 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2023-02-17 07:59:19,508 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 07:59:19,510 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2023-02-17 07:59:19,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=699, Invalid=1953, Unknown=0, NotChecked=0, Total=2652 [2023-02-17 07:59:19,511 INFO L87 Difference]: Start difference. First operand 86 states and 94 transitions. Second operand has 52 states, 52 states have (on average 2.423076923076923) internal successors, (126), 52 states have internal predecessors, (126), 24 states have call successors, (24), 1 states have call predecessors, (24), 24 states have return successors, (65), 24 states have call predecessors, (65), 24 states have call successors, (65) [2023-02-17 07:59:19,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 07:59:19,788 INFO L93 Difference]: Finished difference Result 100 states and 111 transitions. [2023-02-17 07:59:19,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-02-17 07:59:19,789 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 2.423076923076923) internal successors, (126), 52 states have internal predecessors, (126), 24 states have call successors, (24), 1 states have call predecessors, (24), 24 states have return successors, (65), 24 states have call predecessors, (65), 24 states have call successors, (65) Word has length 157 [2023-02-17 07:59:19,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 07:59:19,791 INFO L225 Difference]: With dead ends: 100 [2023-02-17 07:59:19,791 INFO L226 Difference]: Without dead ends: 94 [2023-02-17 07:59:19,793 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 405 GetRequests, 286 SyntacticMatches, 45 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2429 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1899, Invalid=3801, Unknown=0, NotChecked=0, Total=5700 [2023-02-17 07:59:19,794 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 70 mSDsluCounter, 176 mSDsCounter, 0 mSdLazyCounter, 160 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 189 SdHoareTripleChecker+Invalid, 186 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 160 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-17 07:59:19,795 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [94 Valid, 189 Invalid, 186 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 160 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-17 07:59:19,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2023-02-17 07:59:19,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 92. [2023-02-17 07:59:19,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 63 states have (on average 1.0793650793650793) internal successors, (68), 63 states have internal predecessors, (68), 4 states have call successors, (4), 3 states have call predecessors, (4), 24 states have return successors, (28), 25 states have call predecessors, (28), 4 states have call successors, (28) [2023-02-17 07:59:19,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 100 transitions. [2023-02-17 07:59:19,800 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 100 transitions. Word has length 157 [2023-02-17 07:59:19,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 07:59:19,801 INFO L495 AbstractCegarLoop]: Abstraction has 92 states and 100 transitions. [2023-02-17 07:59:19,802 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 2.423076923076923) internal successors, (126), 52 states have internal predecessors, (126), 24 states have call successors, (24), 1 states have call predecessors, (24), 24 states have return successors, (65), 24 states have call predecessors, (65), 24 states have call successors, (65) [2023-02-17 07:59:19,802 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 100 transitions. [2023-02-17 07:59:19,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2023-02-17 07:59:19,803 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 07:59:19,804 INFO L195 NwaCegarLoop]: trace histogram [24, 24, 23, 23, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 07:59:19,821 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-02-17 07:59:20,017 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-02-17 07:59:20,017 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 07:59:20,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 07:59:20,018 INFO L85 PathProgramCache]: Analyzing trace with hash -954980936, now seen corresponding path program 12 times [2023-02-17 07:59:20,018 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 07:59:20,018 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [91551987] [2023-02-17 07:59:20,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 07:59:20,018 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 07:59:20,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 07:59:20,327 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-17 07:59:20,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 07:59:20,633 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-17 07:59:20,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 07:59:20,910 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-17 07:59:20,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 07:59:21,171 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-17 07:59:21,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 07:59:21,440 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-17 07:59:21,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 07:59:21,642 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-17 07:59:21,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 07:59:21,810 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-17 07:59:21,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 07:59:21,992 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-17 07:59:22,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 07:59:22,153 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-17 07:59:22,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 07:59:22,276 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-17 07:59:22,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 07:59:22,412 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-17 07:59:22,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 07:59:22,546 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-17 07:59:22,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 07:59:22,650 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-17 07:59:22,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 07:59:22,719 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-17 07:59:22,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 07:59:22,860 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-17 07:59:22,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 07:59:22,950 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-17 07:59:22,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 07:59:23,008 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-17 07:59:23,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 07:59:23,058 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-17 07:59:23,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 07:59:23,100 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-17 07:59:23,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 07:59:23,137 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-17 07:59:23,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 07:59:23,173 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-17 07:59:23,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 07:59:23,204 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-17 07:59:23,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 07:59:23,232 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-17 07:59:23,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 07:59:23,257 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-17 07:59:23,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 07:59:23,281 INFO L134 CoverageAnalysis]: Checked inductivity of 1863 backedges. 0 proven. 805 refuted. 0 times theorem prover too weak. 1058 trivial. 0 not checked. [2023-02-17 07:59:23,282 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 07:59:23,282 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [91551987] [2023-02-17 07:59:23,283 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [91551987] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 07:59:23,283 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1805233416] [2023-02-17 07:59:23,283 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-02-17 07:59:23,283 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 07:59:23,283 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 07:59:23,285 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-17 07:59:23,287 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-02-17 07:59:24,826 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 24 check-sat command(s) [2023-02-17 07:59:24,826 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-17 07:59:24,829 INFO L263 TraceCheckSpWp]: Trace formula consists of 491 conjuncts, 50 conjunts are in the unsatisfiable core [2023-02-17 07:59:24,833 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 07:59:24,893 INFO L134 CoverageAnalysis]: Checked inductivity of 1863 backedges. 0 proven. 805 refuted. 0 times theorem prover too weak. 1058 trivial. 0 not checked. [2023-02-17 07:59:24,893 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 07:59:27,638 INFO L134 CoverageAnalysis]: Checked inductivity of 1863 backedges. 0 proven. 1587 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2023-02-17 07:59:27,640 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1805233416] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 07:59:27,641 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 07:59:27,641 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28, 51] total 56 [2023-02-17 07:59:27,641 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1472744332] [2023-02-17 07:59:27,641 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 07:59:27,642 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2023-02-17 07:59:27,642 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 07:59:27,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2023-02-17 07:59:27,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=809, Invalid=2271, Unknown=0, NotChecked=0, Total=3080 [2023-02-17 07:59:27,644 INFO L87 Difference]: Start difference. First operand 92 states and 100 transitions. Second operand has 56 states, 56 states have (on average 2.4285714285714284) internal successors, (136), 56 states have internal predecessors, (136), 26 states have call successors, (26), 1 states have call predecessors, (26), 26 states have return successors, (71), 26 states have call predecessors, (71), 26 states have call successors, (71) [2023-02-17 07:59:28,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 07:59:28,068 INFO L93 Difference]: Finished difference Result 106 states and 117 transitions. [2023-02-17 07:59:28,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2023-02-17 07:59:28,068 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 2.4285714285714284) internal successors, (136), 56 states have internal predecessors, (136), 26 states have call successors, (26), 1 states have call predecessors, (26), 26 states have return successors, (71), 26 states have call predecessors, (71), 26 states have call successors, (71) Word has length 171 [2023-02-17 07:59:28,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 07:59:28,069 INFO L225 Difference]: With dead ends: 106 [2023-02-17 07:59:28,069 INFO L226 Difference]: Without dead ends: 100 [2023-02-17 07:59:28,072 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 441 GetRequests, 312 SyntacticMatches, 49 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2866 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=2213, Invalid=4429, Unknown=0, NotChecked=0, Total=6642 [2023-02-17 07:59:28,072 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 309 mSDsluCounter, 187 mSDsCounter, 0 mSdLazyCounter, 172 mSolverCounterSat, 177 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 335 SdHoareTripleChecker+Valid, 200 SdHoareTripleChecker+Invalid, 349 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 177 IncrementalHoareTripleChecker+Valid, 172 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-17 07:59:28,072 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [335 Valid, 200 Invalid, 349 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [177 Valid, 172 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-17 07:59:28,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2023-02-17 07:59:28,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 98. [2023-02-17 07:59:28,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 67 states have (on average 1.0746268656716418) internal successors, (72), 67 states have internal predecessors, (72), 4 states have call successors, (4), 3 states have call predecessors, (4), 26 states have return successors, (30), 27 states have call predecessors, (30), 4 states have call successors, (30) [2023-02-17 07:59:28,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 106 transitions. [2023-02-17 07:59:28,077 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 106 transitions. Word has length 171 [2023-02-17 07:59:28,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 07:59:28,078 INFO L495 AbstractCegarLoop]: Abstraction has 98 states and 106 transitions. [2023-02-17 07:59:28,078 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 2.4285714285714284) internal successors, (136), 56 states have internal predecessors, (136), 26 states have call successors, (26), 1 states have call predecessors, (26), 26 states have return successors, (71), 26 states have call predecessors, (71), 26 states have call successors, (71) [2023-02-17 07:59:28,078 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 106 transitions. [2023-02-17 07:59:28,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2023-02-17 07:59:28,079 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 07:59:28,080 INFO L195 NwaCegarLoop]: trace histogram [26, 26, 25, 25, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 07:59:28,095 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-02-17 07:59:28,285 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-02-17 07:59:28,285 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 07:59:28,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 07:59:28,285 INFO L85 PathProgramCache]: Analyzing trace with hash 1800173498, now seen corresponding path program 13 times [2023-02-17 07:59:28,285 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 07:59:28,286 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [268729131] [2023-02-17 07:59:28,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 07:59:28,286 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 07:59:28,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 07:59:28,574 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-17 07:59:28,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 07:59:28,893 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-17 07:59:28,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 07:59:29,110 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-17 07:59:29,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 07:59:29,331 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-17 07:59:29,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 07:59:29,582 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-17 07:59:29,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 07:59:29,763 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-17 07:59:29,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 07:59:29,950 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-17 07:59:29,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 07:59:30,163 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-17 07:59:30,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 07:59:30,374 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-17 07:59:30,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 07:59:30,569 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-17 07:59:30,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 07:59:30,714 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-17 07:59:30,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 07:59:30,831 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-17 07:59:30,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 07:59:30,931 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-17 07:59:30,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 07:59:31,029 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-17 07:59:31,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 07:59:31,110 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-17 07:59:31,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 07:59:31,175 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-17 07:59:31,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 07:59:31,230 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-17 07:59:31,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 07:59:31,278 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-17 07:59:31,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 07:59:31,321 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-17 07:59:31,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 07:59:31,360 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-17 07:59:31,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 07:59:31,397 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-17 07:59:31,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 07:59:31,428 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-17 07:59:31,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 07:59:31,456 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-17 07:59:31,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 07:59:31,483 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-17 07:59:31,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 07:59:31,506 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-17 07:59:31,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 07:59:31,527 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-17 07:59:31,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 07:59:31,551 INFO L134 CoverageAnalysis]: Checked inductivity of 2200 backedges. 0 proven. 950 refuted. 0 times theorem prover too weak. 1250 trivial. 0 not checked. [2023-02-17 07:59:31,551 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 07:59:31,551 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [268729131] [2023-02-17 07:59:31,551 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [268729131] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 07:59:31,552 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [339080902] [2023-02-17 07:59:31,552 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-02-17 07:59:31,552 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 07:59:31,552 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 07:59:31,557 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-17 07:59:31,560 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-02-17 07:59:33,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 07:59:33,509 INFO L263 TraceCheckSpWp]: Trace formula consists of 529 conjuncts, 54 conjunts are in the unsatisfiable core [2023-02-17 07:59:33,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 07:59:33,553 INFO L134 CoverageAnalysis]: Checked inductivity of 2200 backedges. 0 proven. 950 refuted. 0 times theorem prover too weak. 1250 trivial. 0 not checked. [2023-02-17 07:59:33,553 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 07:59:36,803 INFO L134 CoverageAnalysis]: Checked inductivity of 2200 backedges. 0 proven. 1875 refuted. 0 times theorem prover too weak. 325 trivial. 0 not checked. [2023-02-17 07:59:36,803 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [339080902] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 07:59:36,803 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 07:59:36,803 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30, 55] total 60 [2023-02-17 07:59:36,805 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1456379601] [2023-02-17 07:59:36,805 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 07:59:36,806 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2023-02-17 07:59:36,807 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 07:59:36,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2023-02-17 07:59:36,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=927, Invalid=2613, Unknown=0, NotChecked=0, Total=3540 [2023-02-17 07:59:36,810 INFO L87 Difference]: Start difference. First operand 98 states and 106 transitions. Second operand has 60 states, 60 states have (on average 2.433333333333333) internal successors, (146), 60 states have internal predecessors, (146), 28 states have call successors, (28), 1 states have call predecessors, (28), 28 states have return successors, (77), 28 states have call predecessors, (77), 28 states have call successors, (77) [2023-02-17 07:59:37,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 07:59:37,196 INFO L93 Difference]: Finished difference Result 112 states and 123 transitions. [2023-02-17 07:59:37,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-02-17 07:59:37,199 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 60 states have (on average 2.433333333333333) internal successors, (146), 60 states have internal predecessors, (146), 28 states have call successors, (28), 1 states have call predecessors, (28), 28 states have return successors, (77), 28 states have call predecessors, (77), 28 states have call successors, (77) Word has length 185 [2023-02-17 07:59:37,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 07:59:37,200 INFO L225 Difference]: With dead ends: 112 [2023-02-17 07:59:37,200 INFO L226 Difference]: Without dead ends: 106 [2023-02-17 07:59:37,202 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 477 GetRequests, 338 SyntacticMatches, 53 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3339 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=2551, Invalid=5105, Unknown=0, NotChecked=0, Total=7656 [2023-02-17 07:59:37,203 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 447 mSDsluCounter, 207 mSDsCounter, 0 mSdLazyCounter, 205 mSolverCounterSat, 252 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 475 SdHoareTripleChecker+Valid, 220 SdHoareTripleChecker+Invalid, 457 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 252 IncrementalHoareTripleChecker+Valid, 205 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-17 07:59:37,203 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [475 Valid, 220 Invalid, 457 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [252 Valid, 205 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-17 07:59:37,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2023-02-17 07:59:37,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 104. [2023-02-17 07:59:37,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 71 states have (on average 1.0704225352112675) internal successors, (76), 71 states have internal predecessors, (76), 4 states have call successors, (4), 3 states have call predecessors, (4), 28 states have return successors, (32), 29 states have call predecessors, (32), 4 states have call successors, (32) [2023-02-17 07:59:37,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 112 transitions. [2023-02-17 07:59:37,207 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 112 transitions. Word has length 185 [2023-02-17 07:59:37,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 07:59:37,207 INFO L495 AbstractCegarLoop]: Abstraction has 104 states and 112 transitions. [2023-02-17 07:59:37,208 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 60 states have (on average 2.433333333333333) internal successors, (146), 60 states have internal predecessors, (146), 28 states have call successors, (28), 1 states have call predecessors, (28), 28 states have return successors, (77), 28 states have call predecessors, (77), 28 states have call successors, (77) [2023-02-17 07:59:37,208 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 112 transitions. [2023-02-17 07:59:37,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2023-02-17 07:59:37,209 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 07:59:37,209 INFO L195 NwaCegarLoop]: trace histogram [28, 28, 27, 27, 27, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 07:59:37,231 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-02-17 07:59:37,425 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-02-17 07:59:37,425 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 07:59:37,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 07:59:37,425 INFO L85 PathProgramCache]: Analyzing trace with hash -253850436, now seen corresponding path program 14 times [2023-02-17 07:59:37,425 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 07:59:37,425 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1313514972] [2023-02-17 07:59:37,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 07:59:37,426 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 07:59:37,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 07:59:37,728 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-17 07:59:37,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 07:59:37,985 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-17 07:59:38,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 07:59:38,214 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-17 07:59:38,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 07:59:38,467 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-17 07:59:38,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 07:59:38,665 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-17 07:59:38,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 07:59:38,930 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-17 07:59:38,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 07:59:39,157 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-17 07:59:39,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 07:59:39,362 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-17 07:59:39,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 07:59:39,534 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-17 07:59:39,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 07:59:39,685 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-17 07:59:39,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 07:59:39,810 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-17 07:59:39,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 07:59:39,931 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-17 07:59:39,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 07:59:40,036 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-17 07:59:40,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 07:59:40,135 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-17 07:59:40,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 07:59:40,222 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-17 07:59:40,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 07:59:40,300 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-17 07:59:40,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 07:59:40,372 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-17 07:59:40,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 07:59:40,453 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-17 07:59:40,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 07:59:40,522 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-17 07:59:40,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 07:59:40,587 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-17 07:59:40,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 07:59:40,634 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-17 07:59:40,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 07:59:40,675 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-17 07:59:40,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 07:59:40,714 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-17 07:59:40,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 07:59:40,756 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-17 07:59:40,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 07:59:40,786 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-17 07:59:40,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 07:59:40,813 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-17 07:59:40,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 07:59:40,836 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-17 07:59:40,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 07:59:40,857 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-17 07:59:40,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 07:59:40,881 INFO L134 CoverageAnalysis]: Checked inductivity of 2565 backedges. 0 proven. 1107 refuted. 0 times theorem prover too weak. 1458 trivial. 0 not checked. [2023-02-17 07:59:40,882 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 07:59:40,882 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1313514972] [2023-02-17 07:59:40,882 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1313514972] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 07:59:40,882 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1115140885] [2023-02-17 07:59:40,882 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-17 07:59:40,882 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 07:59:40,882 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 07:59:40,883 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-17 07:59:40,885 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-02-17 07:59:43,508 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-17 07:59:43,509 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-17 07:59:43,515 INFO L263 TraceCheckSpWp]: Trace formula consists of 567 conjuncts, 58 conjunts are in the unsatisfiable core [2023-02-17 07:59:43,518 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 07:59:43,570 INFO L134 CoverageAnalysis]: Checked inductivity of 2565 backedges. 0 proven. 1107 refuted. 0 times theorem prover too weak. 1458 trivial. 0 not checked. [2023-02-17 07:59:43,571 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 07:59:47,701 INFO L134 CoverageAnalysis]: Checked inductivity of 2565 backedges. 0 proven. 2187 refuted. 0 times theorem prover too weak. 378 trivial. 0 not checked. [2023-02-17 07:59:47,701 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1115140885] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 07:59:47,702 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 07:59:47,702 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32, 59] total 64 [2023-02-17 07:59:47,702 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1071553936] [2023-02-17 07:59:47,702 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 07:59:47,702 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2023-02-17 07:59:47,702 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 07:59:47,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2023-02-17 07:59:47,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1053, Invalid=2979, Unknown=0, NotChecked=0, Total=4032 [2023-02-17 07:59:47,706 INFO L87 Difference]: Start difference. First operand 104 states and 112 transitions. Second operand has 64 states, 64 states have (on average 2.4375) internal successors, (156), 64 states have internal predecessors, (156), 30 states have call successors, (30), 1 states have call predecessors, (30), 30 states have return successors, (83), 30 states have call predecessors, (83), 30 states have call successors, (83) [2023-02-17 07:59:48,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 07:59:48,171 INFO L93 Difference]: Finished difference Result 118 states and 129 transitions. [2023-02-17 07:59:48,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2023-02-17 07:59:48,172 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 64 states have (on average 2.4375) internal successors, (156), 64 states have internal predecessors, (156), 30 states have call successors, (30), 1 states have call predecessors, (30), 30 states have return successors, (83), 30 states have call predecessors, (83), 30 states have call successors, (83) Word has length 199 [2023-02-17 07:59:48,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 07:59:48,173 INFO L225 Difference]: With dead ends: 118 [2023-02-17 07:59:48,173 INFO L226 Difference]: Without dead ends: 112 [2023-02-17 07:59:48,175 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 513 GetRequests, 364 SyntacticMatches, 57 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3848 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=2913, Invalid=5829, Unknown=0, NotChecked=0, Total=8742 [2023-02-17 07:59:48,175 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 368 mSDsluCounter, 219 mSDsCounter, 0 mSdLazyCounter, 205 mSolverCounterSat, 206 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 398 SdHoareTripleChecker+Valid, 232 SdHoareTripleChecker+Invalid, 411 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 206 IncrementalHoareTripleChecker+Valid, 205 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-17 07:59:48,176 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [398 Valid, 232 Invalid, 411 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [206 Valid, 205 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-17 07:59:48,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2023-02-17 07:59:48,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 110. [2023-02-17 07:59:48,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 75 states have (on average 1.0666666666666667) internal successors, (80), 75 states have internal predecessors, (80), 4 states have call successors, (4), 3 states have call predecessors, (4), 30 states have return successors, (34), 31 states have call predecessors, (34), 4 states have call successors, (34) [2023-02-17 07:59:48,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 118 transitions. [2023-02-17 07:59:48,181 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 118 transitions. Word has length 199 [2023-02-17 07:59:48,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 07:59:48,181 INFO L495 AbstractCegarLoop]: Abstraction has 110 states and 118 transitions. [2023-02-17 07:59:48,182 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 64 states have (on average 2.4375) internal successors, (156), 64 states have internal predecessors, (156), 30 states have call successors, (30), 1 states have call predecessors, (30), 30 states have return successors, (83), 30 states have call predecessors, (83), 30 states have call successors, (83) [2023-02-17 07:59:48,182 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 118 transitions. [2023-02-17 07:59:48,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 214 [2023-02-17 07:59:48,183 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 07:59:48,184 INFO L195 NwaCegarLoop]: trace histogram [30, 30, 29, 29, 29, 29, 29, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 07:59:48,215 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-02-17 07:59:48,409 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 07:59:48,409 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 07:59:48,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 07:59:48,409 INFO L85 PathProgramCache]: Analyzing trace with hash 1863075006, now seen corresponding path program 15 times [2023-02-17 07:59:48,409 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 07:59:48,410 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [441054814] [2023-02-17 07:59:48,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 07:59:48,410 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 07:59:48,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 07:59:48,813 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-17 07:59:48,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 07:59:49,256 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-17 07:59:49,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 07:59:49,638 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-17 07:59:49,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 07:59:49,979 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-17 07:59:49,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 07:59:50,240 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-17 07:59:50,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 07:59:50,479 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-17 07:59:50,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 07:59:50,724 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-17 07:59:50,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 07:59:50,993 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-17 07:59:51,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 07:59:51,189 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-17 07:59:51,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 07:59:51,374 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-17 07:59:51,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 07:59:51,550 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-17 07:59:51,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 07:59:51,709 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-17 07:59:51,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 07:59:51,927 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-17 07:59:51,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 07:59:52,047 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-17 07:59:52,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 07:59:52,166 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-17 07:59:52,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 07:59:52,272 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-17 07:59:52,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 07:59:52,364 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-17 07:59:52,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 07:59:52,454 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-17 07:59:52,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 07:59:52,530 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-17 07:59:52,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 07:59:52,599 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-17 07:59:52,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 07:59:52,668 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-17 07:59:52,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 07:59:52,722 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-17 07:59:52,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 07:59:52,772 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-17 07:59:52,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 07:59:52,815 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-17 07:59:52,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 07:59:52,855 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-17 07:59:52,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 07:59:52,889 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-17 07:59:52,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 07:59:52,921 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-17 07:59:52,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 07:59:52,949 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-17 07:59:52,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 07:59:52,975 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-17 07:59:52,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 07:59:53,001 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-17 07:59:53,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 07:59:53,034 INFO L134 CoverageAnalysis]: Checked inductivity of 2958 backedges. 0 proven. 1276 refuted. 0 times theorem prover too weak. 1682 trivial. 0 not checked. [2023-02-17 07:59:53,034 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 07:59:53,034 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [441054814] [2023-02-17 07:59:53,035 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [441054814] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 07:59:53,035 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [914677108] [2023-02-17 07:59:53,035 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-17 07:59:53,035 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 07:59:53,035 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 07:59:53,037 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-17 07:59:53,040 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-02-17 07:59:56,603 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 30 check-sat command(s) [2023-02-17 07:59:56,603 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-17 07:59:56,607 INFO L263 TraceCheckSpWp]: Trace formula consists of 605 conjuncts, 62 conjunts are in the unsatisfiable core [2023-02-17 07:59:56,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 07:59:56,676 INFO L134 CoverageAnalysis]: Checked inductivity of 2958 backedges. 0 proven. 1276 refuted. 0 times theorem prover too weak. 1682 trivial. 0 not checked. [2023-02-17 07:59:56,676 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 08:00:01,697 INFO L134 CoverageAnalysis]: Checked inductivity of 2958 backedges. 0 proven. 2523 refuted. 0 times theorem prover too weak. 435 trivial. 0 not checked. [2023-02-17 08:00:01,698 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [914677108] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 08:00:01,698 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 08:00:01,698 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34, 63] total 68 [2023-02-17 08:00:01,698 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1811336493] [2023-02-17 08:00:01,699 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 08:00:01,699 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2023-02-17 08:00:01,699 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 08:00:01,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2023-02-17 08:00:01,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1187, Invalid=3369, Unknown=0, NotChecked=0, Total=4556 [2023-02-17 08:00:01,702 INFO L87 Difference]: Start difference. First operand 110 states and 118 transitions. Second operand has 68 states, 68 states have (on average 2.4411764705882355) internal successors, (166), 68 states have internal predecessors, (166), 32 states have call successors, (32), 1 states have call predecessors, (32), 32 states have return successors, (89), 32 states have call predecessors, (89), 32 states have call successors, (89) [2023-02-17 08:00:02,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 08:00:02,169 INFO L93 Difference]: Finished difference Result 124 states and 135 transitions. [2023-02-17 08:00:02,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2023-02-17 08:00:02,169 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 68 states have (on average 2.4411764705882355) internal successors, (166), 68 states have internal predecessors, (166), 32 states have call successors, (32), 1 states have call predecessors, (32), 32 states have return successors, (89), 32 states have call predecessors, (89), 32 states have call successors, (89) Word has length 213 [2023-02-17 08:00:02,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 08:00:02,171 INFO L225 Difference]: With dead ends: 124 [2023-02-17 08:00:02,171 INFO L226 Difference]: Without dead ends: 118 [2023-02-17 08:00:02,173 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 549 GetRequests, 390 SyntacticMatches, 61 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4393 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=3299, Invalid=6601, Unknown=0, NotChecked=0, Total=9900 [2023-02-17 08:00:02,174 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 401 mSDsluCounter, 227 mSDsCounter, 0 mSdLazyCounter, 201 mSolverCounterSat, 214 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 433 SdHoareTripleChecker+Valid, 240 SdHoareTripleChecker+Invalid, 415 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 214 IncrementalHoareTripleChecker+Valid, 201 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-17 08:00:02,174 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [433 Valid, 240 Invalid, 415 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [214 Valid, 201 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-17 08:00:02,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2023-02-17 08:00:02,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 116. [2023-02-17 08:00:02,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 79 states have (on average 1.0632911392405062) internal successors, (84), 79 states have internal predecessors, (84), 4 states have call successors, (4), 3 states have call predecessors, (4), 32 states have return successors, (36), 33 states have call predecessors, (36), 4 states have call successors, (36) [2023-02-17 08:00:02,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 124 transitions. [2023-02-17 08:00:02,179 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 124 transitions. Word has length 213 [2023-02-17 08:00:02,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 08:00:02,180 INFO L495 AbstractCegarLoop]: Abstraction has 116 states and 124 transitions. [2023-02-17 08:00:02,180 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 68 states have (on average 2.4411764705882355) internal successors, (166), 68 states have internal predecessors, (166), 32 states have call successors, (32), 1 states have call predecessors, (32), 32 states have return successors, (89), 32 states have call predecessors, (89), 32 states have call successors, (89) [2023-02-17 08:00:02,180 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 124 transitions. [2023-02-17 08:00:02,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 228 [2023-02-17 08:00:02,182 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 08:00:02,182 INFO L195 NwaCegarLoop]: trace histogram [32, 32, 31, 31, 31, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 08:00:02,215 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2023-02-17 08:00:02,393 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-02-17 08:00:02,393 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 08:00:02,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 08:00:02,393 INFO L85 PathProgramCache]: Analyzing trace with hash 561479616, now seen corresponding path program 16 times [2023-02-17 08:00:02,394 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 08:00:02,394 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1890411594] [2023-02-17 08:00:02,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 08:00:02,394 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 08:00:02,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:00:02,819 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-17 08:00:02,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:00:03,159 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-17 08:00:03,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:00:03,450 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-17 08:00:03,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:00:03,883 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-17 08:00:03,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:00:04,201 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-17 08:00:04,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:00:04,462 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-17 08:00:04,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:00:04,707 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-17 08:00:04,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:00:04,919 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-17 08:00:04,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:00:05,128 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-17 08:00:05,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:00:05,320 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-17 08:00:05,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:00:05,488 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-17 08:00:05,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:00:05,662 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-17 08:00:05,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:00:05,819 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-17 08:00:05,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:00:05,960 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-17 08:00:05,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:00:06,086 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-17 08:00:06,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:00:06,204 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-17 08:00:06,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:00:06,444 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-17 08:00:06,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:00:06,542 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-17 08:00:06,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:00:06,668 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-17 08:00:06,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:00:06,755 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-17 08:00:06,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:00:06,837 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-17 08:00:06,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:00:06,916 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-17 08:00:06,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:00:06,979 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-17 08:00:06,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:00:07,040 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-17 08:00:07,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:00:07,089 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-17 08:00:07,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:00:07,137 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-17 08:00:07,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:00:07,176 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-17 08:00:07,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:00:07,218 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-17 08:00:07,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:00:07,256 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-17 08:00:07,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:00:07,289 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-17 08:00:07,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:00:07,315 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-17 08:00:07,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:00:07,340 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-17 08:00:07,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:00:07,366 INFO L134 CoverageAnalysis]: Checked inductivity of 3379 backedges. 0 proven. 1457 refuted. 0 times theorem prover too weak. 1922 trivial. 0 not checked. [2023-02-17 08:00:07,367 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 08:00:07,367 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1890411594] [2023-02-17 08:00:07,367 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1890411594] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 08:00:07,367 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1933113879] [2023-02-17 08:00:07,367 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-17 08:00:07,367 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 08:00:07,367 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 08:00:07,369 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-17 08:00:07,370 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-02-17 08:00:11,956 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-17 08:00:11,956 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-17 08:00:11,960 INFO L263 TraceCheckSpWp]: Trace formula consists of 643 conjuncts, 66 conjunts are in the unsatisfiable core [2023-02-17 08:00:11,963 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 08:00:12,022 INFO L134 CoverageAnalysis]: Checked inductivity of 3379 backedges. 0 proven. 1457 refuted. 0 times theorem prover too weak. 1922 trivial. 0 not checked. [2023-02-17 08:00:12,022 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 08:00:18,665 INFO L134 CoverageAnalysis]: Checked inductivity of 3379 backedges. 0 proven. 2883 refuted. 0 times theorem prover too weak. 496 trivial. 0 not checked. [2023-02-17 08:00:18,666 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1933113879] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 08:00:18,666 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 08:00:18,666 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36, 67] total 72 [2023-02-17 08:00:18,666 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1118122701] [2023-02-17 08:00:18,666 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 08:00:18,667 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 72 states [2023-02-17 08:00:18,667 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 08:00:18,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2023-02-17 08:00:18,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1329, Invalid=3783, Unknown=0, NotChecked=0, Total=5112 [2023-02-17 08:00:18,669 INFO L87 Difference]: Start difference. First operand 116 states and 124 transitions. Second operand has 72 states, 72 states have (on average 2.4444444444444446) internal successors, (176), 72 states have internal predecessors, (176), 34 states have call successors, (34), 1 states have call predecessors, (34), 34 states have return successors, (95), 34 states have call predecessors, (95), 34 states have call successors, (95) [2023-02-17 08:00:19,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 08:00:19,241 INFO L93 Difference]: Finished difference Result 130 states and 141 transitions. [2023-02-17 08:00:19,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2023-02-17 08:00:19,242 INFO L78 Accepts]: Start accepts. Automaton has has 72 states, 72 states have (on average 2.4444444444444446) internal successors, (176), 72 states have internal predecessors, (176), 34 states have call successors, (34), 1 states have call predecessors, (34), 34 states have return successors, (95), 34 states have call predecessors, (95), 34 states have call successors, (95) Word has length 227 [2023-02-17 08:00:19,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 08:00:19,243 INFO L225 Difference]: With dead ends: 130 [2023-02-17 08:00:19,243 INFO L226 Difference]: Without dead ends: 124 [2023-02-17 08:00:19,245 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 585 GetRequests, 416 SyntacticMatches, 65 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4974 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=3709, Invalid=7421, Unknown=0, NotChecked=0, Total=11130 [2023-02-17 08:00:19,245 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 896 mSDsluCounter, 264 mSDsCounter, 0 mSdLazyCounter, 249 mSolverCounterSat, 495 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 930 SdHoareTripleChecker+Valid, 277 SdHoareTripleChecker+Invalid, 744 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 495 IncrementalHoareTripleChecker+Valid, 249 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-17 08:00:19,246 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [930 Valid, 277 Invalid, 744 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [495 Valid, 249 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-17 08:00:19,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2023-02-17 08:00:19,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 122. [2023-02-17 08:00:19,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 83 states have (on average 1.0602409638554218) internal successors, (88), 83 states have internal predecessors, (88), 4 states have call successors, (4), 3 states have call predecessors, (4), 34 states have return successors, (38), 35 states have call predecessors, (38), 4 states have call successors, (38) [2023-02-17 08:00:19,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 130 transitions. [2023-02-17 08:00:19,251 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 130 transitions. Word has length 227 [2023-02-17 08:00:19,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 08:00:19,251 INFO L495 AbstractCegarLoop]: Abstraction has 122 states and 130 transitions. [2023-02-17 08:00:19,252 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 72 states, 72 states have (on average 2.4444444444444446) internal successors, (176), 72 states have internal predecessors, (176), 34 states have call successors, (34), 1 states have call predecessors, (34), 34 states have return successors, (95), 34 states have call predecessors, (95), 34 states have call successors, (95) [2023-02-17 08:00:19,252 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 130 transitions. [2023-02-17 08:00:19,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 242 [2023-02-17 08:00:19,253 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 08:00:19,253 INFO L195 NwaCegarLoop]: trace histogram [34, 34, 33, 33, 33, 33, 33, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 08:00:19,303 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-02-17 08:00:19,473 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-02-17 08:00:19,473 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 08:00:19,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 08:00:19,473 INFO L85 PathProgramCache]: Analyzing trace with hash -1037951550, now seen corresponding path program 17 times [2023-02-17 08:00:19,473 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 08:00:19,473 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1123594049] [2023-02-17 08:00:19,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 08:00:19,474 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 08:00:19,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:00:19,975 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-17 08:00:19,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:00:20,694 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-17 08:00:20,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:00:21,127 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-17 08:00:21,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:00:21,508 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-17 08:00:21,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:00:21,870 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-17 08:00:21,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:00:22,142 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-17 08:00:22,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:00:22,409 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-17 08:00:22,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:00:22,663 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-17 08:00:22,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:00:22,886 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-17 08:00:22,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:00:23,108 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-17 08:00:23,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:00:23,312 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-17 08:00:23,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:00:23,503 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-17 08:00:23,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:00:23,805 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-17 08:00:23,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:00:23,963 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-17 08:00:23,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:00:24,134 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-17 08:00:24,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:00:24,277 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-17 08:00:24,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:00:24,420 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-17 08:00:24,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:00:24,552 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-17 08:00:24,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:00:24,665 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-17 08:00:24,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:00:24,762 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-17 08:00:24,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:00:24,854 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-17 08:00:24,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:00:24,935 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-17 08:00:24,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:00:25,011 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-17 08:00:25,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:00:25,081 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-17 08:00:25,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:00:25,143 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-17 08:00:25,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:00:25,198 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-17 08:00:25,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:00:25,254 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-17 08:00:25,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:00:25,299 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-17 08:00:25,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:00:25,341 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-17 08:00:25,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:00:25,376 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-17 08:00:25,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:00:25,409 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-17 08:00:25,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:00:25,440 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-17 08:00:25,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:00:25,467 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-17 08:00:25,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:00:25,492 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-17 08:00:25,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:00:25,530 INFO L134 CoverageAnalysis]: Checked inductivity of 3828 backedges. 0 proven. 1650 refuted. 0 times theorem prover too weak. 2178 trivial. 0 not checked. [2023-02-17 08:00:25,531 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 08:00:25,531 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1123594049] [2023-02-17 08:00:25,531 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1123594049] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 08:00:25,531 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [232883931] [2023-02-17 08:00:25,531 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-17 08:00:25,532 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 08:00:25,532 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 08:00:25,533 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-17 08:00:25,535 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-02-17 08:00:31,336 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 34 check-sat command(s) [2023-02-17 08:00:31,336 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-17 08:00:31,340 INFO L263 TraceCheckSpWp]: Trace formula consists of 681 conjuncts, 70 conjunts are in the unsatisfiable core [2023-02-17 08:00:31,349 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 08:00:31,400 INFO L134 CoverageAnalysis]: Checked inductivity of 3828 backedges. 0 proven. 1650 refuted. 0 times theorem prover too weak. 2178 trivial. 0 not checked. [2023-02-17 08:00:31,400 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 08:00:39,332 INFO L134 CoverageAnalysis]: Checked inductivity of 3828 backedges. 0 proven. 3267 refuted. 0 times theorem prover too weak. 561 trivial. 0 not checked. [2023-02-17 08:00:39,332 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [232883931] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 08:00:39,332 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 08:00:39,332 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38, 71] total 76 [2023-02-17 08:00:39,332 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1911642072] [2023-02-17 08:00:39,332 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 08:00:39,333 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 76 states [2023-02-17 08:00:39,333 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 08:00:39,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2023-02-17 08:00:39,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1479, Invalid=4221, Unknown=0, NotChecked=0, Total=5700 [2023-02-17 08:00:39,336 INFO L87 Difference]: Start difference. First operand 122 states and 130 transitions. Second operand has 76 states, 76 states have (on average 2.4473684210526314) internal successors, (186), 76 states have internal predecessors, (186), 36 states have call successors, (36), 1 states have call predecessors, (36), 36 states have return successors, (101), 36 states have call predecessors, (101), 36 states have call successors, (101) [2023-02-17 08:00:40,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 08:00:40,006 INFO L93 Difference]: Finished difference Result 136 states and 147 transitions. [2023-02-17 08:00:40,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2023-02-17 08:00:40,007 INFO L78 Accepts]: Start accepts. Automaton has has 76 states, 76 states have (on average 2.4473684210526314) internal successors, (186), 76 states have internal predecessors, (186), 36 states have call successors, (36), 1 states have call predecessors, (36), 36 states have return successors, (101), 36 states have call predecessors, (101), 36 states have call successors, (101) Word has length 241 [2023-02-17 08:00:40,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 08:00:40,008 INFO L225 Difference]: With dead ends: 136 [2023-02-17 08:00:40,008 INFO L226 Difference]: Without dead ends: 130 [2023-02-17 08:00:40,014 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 621 GetRequests, 442 SyntacticMatches, 69 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5591 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=4143, Invalid=8289, Unknown=0, NotChecked=0, Total=12432 [2023-02-17 08:00:40,015 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 1167 mSDsluCounter, 271 mSDsCounter, 0 mSdLazyCounter, 239 mSolverCounterSat, 646 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1203 SdHoareTripleChecker+Valid, 284 SdHoareTripleChecker+Invalid, 885 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 646 IncrementalHoareTripleChecker+Valid, 239 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-17 08:00:40,016 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1203 Valid, 284 Invalid, 885 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [646 Valid, 239 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-17 08:00:40,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2023-02-17 08:00:40,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 128. [2023-02-17 08:00:40,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 87 states have (on average 1.0574712643678161) internal successors, (92), 87 states have internal predecessors, (92), 4 states have call successors, (4), 3 states have call predecessors, (4), 36 states have return successors, (40), 37 states have call predecessors, (40), 4 states have call successors, (40) [2023-02-17 08:00:40,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 136 transitions. [2023-02-17 08:00:40,021 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 136 transitions. Word has length 241 [2023-02-17 08:00:40,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 08:00:40,022 INFO L495 AbstractCegarLoop]: Abstraction has 128 states and 136 transitions. [2023-02-17 08:00:40,022 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 76 states, 76 states have (on average 2.4473684210526314) internal successors, (186), 76 states have internal predecessors, (186), 36 states have call successors, (36), 1 states have call predecessors, (36), 36 states have return successors, (101), 36 states have call predecessors, (101), 36 states have call successors, (101) [2023-02-17 08:00:40,022 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 136 transitions. [2023-02-17 08:00:40,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 256 [2023-02-17 08:00:40,023 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 08:00:40,023 INFO L195 NwaCegarLoop]: trace histogram [36, 36, 35, 35, 35, 35, 35, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 08:00:40,072 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-02-17 08:00:40,224 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 08:00:40,224 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 08:00:40,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 08:00:40,224 INFO L85 PathProgramCache]: Analyzing trace with hash -479330620, now seen corresponding path program 18 times [2023-02-17 08:00:40,225 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 08:00:40,225 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1265709677] [2023-02-17 08:00:40,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 08:00:40,225 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 08:00:40,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:00:40,977 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-17 08:00:40,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:00:41,426 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-17 08:00:41,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:00:42,000 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-17 08:00:42,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:00:42,549 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-17 08:00:42,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:00:42,906 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-17 08:00:42,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:00:43,245 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-17 08:00:43,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:00:43,563 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-17 08:00:43,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:00:43,912 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-17 08:00:43,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:00:44,278 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-17 08:00:44,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:00:44,547 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-17 08:00:44,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:00:44,783 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-17 08:00:44,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:00:44,994 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-17 08:00:45,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:00:45,191 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-17 08:00:45,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:00:45,407 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-17 08:00:45,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:00:45,584 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-17 08:00:45,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:00:45,764 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-17 08:00:45,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:00:46,000 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-17 08:00:46,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:00:46,147 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-17 08:00:46,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:00:46,286 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-17 08:00:46,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:00:46,422 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-17 08:00:46,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:00:46,566 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-17 08:00:46,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:00:46,702 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-17 08:00:46,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:00:46,823 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-17 08:00:46,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:00:46,904 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-17 08:00:46,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:00:46,980 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-17 08:00:46,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:00:47,049 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-17 08:00:47,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:00:47,112 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-17 08:00:47,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:00:47,178 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-17 08:00:47,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:00:47,230 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-17 08:00:47,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:00:47,282 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-17 08:00:47,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:00:47,323 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-17 08:00:47,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:00:47,360 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-17 08:00:47,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:00:47,393 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-17 08:00:47,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:00:47,425 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-17 08:00:47,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:00:47,456 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-17 08:00:47,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:00:47,482 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-17 08:00:47,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:00:47,512 INFO L134 CoverageAnalysis]: Checked inductivity of 4305 backedges. 0 proven. 1855 refuted. 0 times theorem prover too weak. 2450 trivial. 0 not checked. [2023-02-17 08:00:47,512 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 08:00:47,512 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1265709677] [2023-02-17 08:00:47,512 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1265709677] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 08:00:47,512 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1619293120] [2023-02-17 08:00:47,512 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-02-17 08:00:47,513 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 08:00:47,513 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 08:00:47,514 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-17 08:00:47,515 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-02-17 08:00:54,950 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 36 check-sat command(s) [2023-02-17 08:00:54,950 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-17 08:00:54,954 INFO L263 TraceCheckSpWp]: Trace formula consists of 719 conjuncts, 74 conjunts are in the unsatisfiable core [2023-02-17 08:00:54,958 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 08:00:55,008 INFO L134 CoverageAnalysis]: Checked inductivity of 4305 backedges. 0 proven. 1855 refuted. 0 times theorem prover too weak. 2450 trivial. 0 not checked. [2023-02-17 08:00:55,008 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 08:01:04,197 INFO L134 CoverageAnalysis]: Checked inductivity of 4305 backedges. 0 proven. 3675 refuted. 0 times theorem prover too weak. 630 trivial. 0 not checked. [2023-02-17 08:01:04,197 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1619293120] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 08:01:04,197 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 08:01:04,197 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40, 75] total 80 [2023-02-17 08:01:04,197 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1386893155] [2023-02-17 08:01:04,197 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 08:01:04,198 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 80 states [2023-02-17 08:01:04,198 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 08:01:04,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2023-02-17 08:01:04,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1637, Invalid=4683, Unknown=0, NotChecked=0, Total=6320 [2023-02-17 08:01:04,200 INFO L87 Difference]: Start difference. First operand 128 states and 136 transitions. Second operand has 80 states, 80 states have (on average 2.45) internal successors, (196), 80 states have internal predecessors, (196), 38 states have call successors, (38), 1 states have call predecessors, (38), 38 states have return successors, (107), 38 states have call predecessors, (107), 38 states have call successors, (107) [2023-02-17 08:01:04,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 08:01:04,682 INFO L93 Difference]: Finished difference Result 142 states and 153 transitions. [2023-02-17 08:01:04,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2023-02-17 08:01:04,683 INFO L78 Accepts]: Start accepts. Automaton has has 80 states, 80 states have (on average 2.45) internal successors, (196), 80 states have internal predecessors, (196), 38 states have call successors, (38), 1 states have call predecessors, (38), 38 states have return successors, (107), 38 states have call predecessors, (107), 38 states have call successors, (107) Word has length 255 [2023-02-17 08:01:04,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 08:01:04,684 INFO L225 Difference]: With dead ends: 142 [2023-02-17 08:01:04,684 INFO L226 Difference]: Without dead ends: 136 [2023-02-17 08:01:04,686 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 657 GetRequests, 468 SyntacticMatches, 73 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6244 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=4601, Invalid=9205, Unknown=0, NotChecked=0, Total=13806 [2023-02-17 08:01:04,686 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 187 mSDsluCounter, 279 mSDsCounter, 0 mSdLazyCounter, 224 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 225 SdHoareTripleChecker+Valid, 292 SdHoareTripleChecker+Invalid, 309 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 224 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-17 08:01:04,687 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [225 Valid, 292 Invalid, 309 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 224 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-17 08:01:04,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2023-02-17 08:01:04,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 134. [2023-02-17 08:01:04,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 91 states have (on average 1.054945054945055) internal successors, (96), 91 states have internal predecessors, (96), 4 states have call successors, (4), 3 states have call predecessors, (4), 38 states have return successors, (42), 39 states have call predecessors, (42), 4 states have call successors, (42) [2023-02-17 08:01:04,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 142 transitions. [2023-02-17 08:01:04,692 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 142 transitions. Word has length 255 [2023-02-17 08:01:04,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 08:01:04,692 INFO L495 AbstractCegarLoop]: Abstraction has 134 states and 142 transitions. [2023-02-17 08:01:04,692 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 80 states, 80 states have (on average 2.45) internal successors, (196), 80 states have internal predecessors, (196), 38 states have call successors, (38), 1 states have call predecessors, (38), 38 states have return successors, (107), 38 states have call predecessors, (107), 38 states have call successors, (107) [2023-02-17 08:01:04,693 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 142 transitions. [2023-02-17 08:01:04,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 270 [2023-02-17 08:01:04,694 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 08:01:04,694 INFO L195 NwaCegarLoop]: trace histogram [38, 38, 37, 37, 37, 37, 37, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 08:01:04,751 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2023-02-17 08:01:04,897 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 08:01:04,897 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 08:01:04,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 08:01:04,897 INFO L85 PathProgramCache]: Analyzing trace with hash 1243415238, now seen corresponding path program 19 times [2023-02-17 08:01:04,897 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 08:01:04,897 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [453461356] [2023-02-17 08:01:04,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 08:01:04,898 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 08:01:05,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:01:05,673 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-17 08:01:05,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:01:06,100 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-17 08:01:06,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:01:06,574 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-17 08:01:06,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:01:07,042 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-17 08:01:07,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:01:07,596 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-17 08:01:07,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:01:08,012 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-17 08:01:08,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:01:08,344 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-17 08:01:08,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:01:08,651 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-17 08:01:08,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:01:08,945 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-17 08:01:08,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:01:09,347 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-17 08:01:09,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:01:09,604 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-17 08:01:09,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:01:09,839 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-17 08:01:09,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:01:10,064 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-17 08:01:10,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:01:10,271 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-17 08:01:10,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:01:10,502 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-17 08:01:10,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:01:10,705 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-17 08:01:10,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:01:10,891 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-17 08:01:10,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:01:11,053 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-17 08:01:11,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:01:11,303 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-17 08:01:11,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:01:11,451 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-17 08:01:11,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:01:11,583 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-17 08:01:11,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:01:11,708 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-17 08:01:11,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:01:11,815 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-17 08:01:11,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:01:11,916 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-17 08:01:11,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:01:12,006 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-17 08:01:12,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:01:12,089 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-17 08:01:12,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:01:12,163 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-17 08:01:12,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:01:12,229 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-17 08:01:12,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:01:12,303 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-17 08:01:12,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:01:12,357 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-17 08:01:12,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:01:12,408 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-17 08:01:12,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:01:12,454 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-17 08:01:12,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:01:12,497 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-17 08:01:12,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:01:12,540 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-17 08:01:12,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:01:12,575 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-17 08:01:12,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:01:12,607 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-17 08:01:12,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:01:12,636 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-17 08:01:12,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:01:12,663 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-17 08:01:12,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:01:12,693 INFO L134 CoverageAnalysis]: Checked inductivity of 4810 backedges. 0 proven. 2072 refuted. 0 times theorem prover too weak. 2738 trivial. 0 not checked. [2023-02-17 08:01:12,693 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 08:01:12,694 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [453461356] [2023-02-17 08:01:12,694 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [453461356] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 08:01:12,694 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [161176230] [2023-02-17 08:01:12,694 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-02-17 08:01:12,694 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 08:01:12,694 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 08:01:12,697 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-17 08:01:12,710 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-02-17 08:01:21,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:01:21,734 INFO L263 TraceCheckSpWp]: Trace formula consists of 757 conjuncts, 78 conjunts are in the unsatisfiable core [2023-02-17 08:01:21,749 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 08:01:21,808 INFO L134 CoverageAnalysis]: Checked inductivity of 4810 backedges. 0 proven. 2072 refuted. 0 times theorem prover too weak. 2738 trivial. 0 not checked. [2023-02-17 08:01:21,809 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 08:01:32,883 INFO L134 CoverageAnalysis]: Checked inductivity of 4810 backedges. 0 proven. 4107 refuted. 0 times theorem prover too weak. 703 trivial. 0 not checked. [2023-02-17 08:01:32,884 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [161176230] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 08:01:32,884 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 08:01:32,884 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42, 79] total 84 [2023-02-17 08:01:32,884 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [410439255] [2023-02-17 08:01:32,884 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 08:01:32,885 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 84 states [2023-02-17 08:01:32,885 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 08:01:32,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2023-02-17 08:01:32,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1803, Invalid=5169, Unknown=0, NotChecked=0, Total=6972 [2023-02-17 08:01:32,886 INFO L87 Difference]: Start difference. First operand 134 states and 142 transitions. Second operand has 84 states, 84 states have (on average 2.4523809523809526) internal successors, (206), 84 states have internal predecessors, (206), 40 states have call successors, (40), 1 states have call predecessors, (40), 40 states have return successors, (113), 40 states have call predecessors, (113), 40 states have call successors, (113) [2023-02-17 08:01:33,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 08:01:33,632 INFO L93 Difference]: Finished difference Result 148 states and 159 transitions. [2023-02-17 08:01:33,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2023-02-17 08:01:33,633 INFO L78 Accepts]: Start accepts. Automaton has has 84 states, 84 states have (on average 2.4523809523809526) internal successors, (206), 84 states have internal predecessors, (206), 40 states have call successors, (40), 1 states have call predecessors, (40), 40 states have return successors, (113), 40 states have call predecessors, (113), 40 states have call successors, (113) Word has length 269 [2023-02-17 08:01:33,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 08:01:33,634 INFO L225 Difference]: With dead ends: 148 [2023-02-17 08:01:33,634 INFO L226 Difference]: Without dead ends: 142 [2023-02-17 08:01:33,636 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 693 GetRequests, 494 SyntacticMatches, 77 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6933 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=5083, Invalid=10169, Unknown=0, NotChecked=0, Total=15252 [2023-02-17 08:01:33,636 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 1118 mSDsluCounter, 301 mSDsCounter, 0 mSdLazyCounter, 262 mSolverCounterSat, 617 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1158 SdHoareTripleChecker+Valid, 314 SdHoareTripleChecker+Invalid, 879 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 617 IncrementalHoareTripleChecker+Valid, 262 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-17 08:01:33,636 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1158 Valid, 314 Invalid, 879 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [617 Valid, 262 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-17 08:01:33,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2023-02-17 08:01:33,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 140. [2023-02-17 08:01:33,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 95 states have (on average 1.0526315789473684) internal successors, (100), 95 states have internal predecessors, (100), 4 states have call successors, (4), 3 states have call predecessors, (4), 40 states have return successors, (44), 41 states have call predecessors, (44), 4 states have call successors, (44) [2023-02-17 08:01:33,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 148 transitions. [2023-02-17 08:01:33,642 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 148 transitions. Word has length 269 [2023-02-17 08:01:33,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 08:01:33,642 INFO L495 AbstractCegarLoop]: Abstraction has 140 states and 148 transitions. [2023-02-17 08:01:33,643 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 84 states, 84 states have (on average 2.4523809523809526) internal successors, (206), 84 states have internal predecessors, (206), 40 states have call successors, (40), 1 states have call predecessors, (40), 40 states have return successors, (113), 40 states have call predecessors, (113), 40 states have call successors, (113) [2023-02-17 08:01:33,643 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 148 transitions. [2023-02-17 08:01:33,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 284 [2023-02-17 08:01:33,644 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 08:01:33,644 INFO L195 NwaCegarLoop]: trace histogram [40, 40, 39, 39, 39, 39, 39, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 08:01:33,720 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2023-02-17 08:01:33,857 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 08:01:33,857 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 08:01:33,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 08:01:33,857 INFO L85 PathProgramCache]: Analyzing trace with hash 1196493256, now seen corresponding path program 20 times [2023-02-17 08:01:33,857 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 08:01:33,857 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1647876972] [2023-02-17 08:01:33,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 08:01:33,858 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 08:01:34,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:01:34,572 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-17 08:01:34,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:01:35,054 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-17 08:01:35,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:01:35,691 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-17 08:01:35,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:01:36,118 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-17 08:01:36,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:01:36,577 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-17 08:01:36,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:01:37,033 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-17 08:01:37,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:01:37,626 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-17 08:01:37,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:01:38,021 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-17 08:01:38,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:01:38,351 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-17 08:01:38,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:01:38,697 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-17 08:01:38,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:01:38,995 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-17 08:01:39,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:01:39,307 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-17 08:01:39,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:01:39,572 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-17 08:01:39,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:01:39,917 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-17 08:01:39,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:01:40,133 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-17 08:01:40,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:01:40,336 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-17 08:01:40,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:01:40,531 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-17 08:01:40,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:01:40,722 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-17 08:01:40,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:01:40,899 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-17 08:01:40,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:01:41,056 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-17 08:01:41,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:01:41,204 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-17 08:01:41,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:01:41,363 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-17 08:01:41,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:01:41,491 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-17 08:01:41,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:01:41,621 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-17 08:01:41,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:01:41,729 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-17 08:01:41,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:01:41,832 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-17 08:01:41,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:01:41,922 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-17 08:01:41,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:01:42,006 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-17 08:01:42,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:01:42,083 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-17 08:01:42,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:01:42,269 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-17 08:01:42,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:01:42,331 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-17 08:01:42,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:01:42,386 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-17 08:01:42,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:01:42,436 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-17 08:01:42,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:01:42,482 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-17 08:01:42,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:01:42,524 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-17 08:01:42,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:01:42,563 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-17 08:01:42,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:01:42,598 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-17 08:01:42,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:01:42,629 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-17 08:01:42,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:01:42,660 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-17 08:01:42,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:01:42,691 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-17 08:01:42,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:01:42,723 INFO L134 CoverageAnalysis]: Checked inductivity of 5343 backedges. 0 proven. 2301 refuted. 0 times theorem prover too weak. 3042 trivial. 0 not checked. [2023-02-17 08:01:42,723 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 08:01:42,723 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1647876972] [2023-02-17 08:01:42,724 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1647876972] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 08:01:42,724 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [814270718] [2023-02-17 08:01:42,724 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-17 08:01:42,724 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 08:01:42,724 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 08:01:42,726 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-17 08:01:42,727 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-02-17 08:01:53,725 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-17 08:01:53,725 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-17 08:01:53,729 INFO L263 TraceCheckSpWp]: Trace formula consists of 795 conjuncts, 82 conjunts are in the unsatisfiable core [2023-02-17 08:01:53,736 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 08:01:53,803 INFO L134 CoverageAnalysis]: Checked inductivity of 5343 backedges. 0 proven. 2301 refuted. 0 times theorem prover too weak. 3042 trivial. 0 not checked. [2023-02-17 08:01:53,803 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 08:02:06,370 INFO L134 CoverageAnalysis]: Checked inductivity of 5343 backedges. 0 proven. 4563 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2023-02-17 08:02:06,371 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [814270718] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 08:02:06,371 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 08:02:06,371 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44, 83] total 88 [2023-02-17 08:02:06,371 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1069818937] [2023-02-17 08:02:06,371 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 08:02:06,372 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 88 states [2023-02-17 08:02:06,372 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 08:02:06,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2023-02-17 08:02:06,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1977, Invalid=5679, Unknown=0, NotChecked=0, Total=7656 [2023-02-17 08:02:06,373 INFO L87 Difference]: Start difference. First operand 140 states and 148 transitions. Second operand has 88 states, 88 states have (on average 2.4545454545454546) internal successors, (216), 88 states have internal predecessors, (216), 42 states have call successors, (42), 1 states have call predecessors, (42), 42 states have return successors, (119), 42 states have call predecessors, (119), 42 states have call successors, (119) [2023-02-17 08:02:07,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 08:02:07,093 INFO L93 Difference]: Finished difference Result 154 states and 165 transitions. [2023-02-17 08:02:07,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2023-02-17 08:02:07,095 INFO L78 Accepts]: Start accepts. Automaton has has 88 states, 88 states have (on average 2.4545454545454546) internal successors, (216), 88 states have internal predecessors, (216), 42 states have call successors, (42), 1 states have call predecessors, (42), 42 states have return successors, (119), 42 states have call predecessors, (119), 42 states have call successors, (119) Word has length 283 [2023-02-17 08:02:07,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 08:02:07,097 INFO L225 Difference]: With dead ends: 154 [2023-02-17 08:02:07,097 INFO L226 Difference]: Without dead ends: 148 [2023-02-17 08:02:07,099 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 729 GetRequests, 520 SyntacticMatches, 81 SemanticMatches, 128 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7658 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=5589, Invalid=11181, Unknown=0, NotChecked=0, Total=16770 [2023-02-17 08:02:07,100 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 557 mSDsluCounter, 304 mSDsCounter, 0 mSdLazyCounter, 242 mSolverCounterSat, 280 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 599 SdHoareTripleChecker+Valid, 317 SdHoareTripleChecker+Invalid, 522 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 280 IncrementalHoareTripleChecker+Valid, 242 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-17 08:02:07,100 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [599 Valid, 317 Invalid, 522 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [280 Valid, 242 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-17 08:02:07,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2023-02-17 08:02:07,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 146. [2023-02-17 08:02:07,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 99 states have (on average 1.0505050505050506) internal successors, (104), 99 states have internal predecessors, (104), 4 states have call successors, (4), 3 states have call predecessors, (4), 42 states have return successors, (46), 43 states have call predecessors, (46), 4 states have call successors, (46) [2023-02-17 08:02:07,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 154 transitions. [2023-02-17 08:02:07,106 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 154 transitions. Word has length 283 [2023-02-17 08:02:07,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 08:02:07,106 INFO L495 AbstractCegarLoop]: Abstraction has 146 states and 154 transitions. [2023-02-17 08:02:07,107 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 88 states, 88 states have (on average 2.4545454545454546) internal successors, (216), 88 states have internal predecessors, (216), 42 states have call successors, (42), 1 states have call predecessors, (42), 42 states have return successors, (119), 42 states have call predecessors, (119), 42 states have call successors, (119) [2023-02-17 08:02:07,107 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 154 transitions. [2023-02-17 08:02:07,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 298 [2023-02-17 08:02:07,108 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 08:02:07,108 INFO L195 NwaCegarLoop]: trace histogram [42, 42, 41, 41, 41, 41, 41, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 08:02:07,212 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2023-02-17 08:02:07,337 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2023-02-17 08:02:07,337 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 08:02:07,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 08:02:07,337 INFO L85 PathProgramCache]: Analyzing trace with hash 311161802, now seen corresponding path program 21 times [2023-02-17 08:02:07,337 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 08:02:07,337 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [474502419] [2023-02-17 08:02:07,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 08:02:07,338 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 08:02:07,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:02:08,116 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-17 08:02:08,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:02:08,869 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-17 08:02:08,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:02:09,388 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-17 08:02:09,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:02:09,851 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-17 08:02:09,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:02:10,468 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-17 08:02:10,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:02:10,950 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-17 08:02:10,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:02:11,373 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-17 08:02:11,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:02:11,821 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-17 08:02:11,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:02:12,366 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-17 08:02:12,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:02:12,795 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-17 08:02:12,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:02:13,129 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-17 08:02:13,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:02:13,431 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-17 08:02:13,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:02:13,716 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-17 08:02:13,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:02:14,004 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-17 08:02:14,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:02:14,412 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-17 08:02:14,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:02:14,655 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-17 08:02:14,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:02:14,875 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-17 08:02:14,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:02:15,111 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-17 08:02:15,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:02:15,317 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-17 08:02:15,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:02:15,506 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-17 08:02:15,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:02:15,697 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-17 08:02:15,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:02:15,901 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-17 08:02:15,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:02:16,055 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-17 08:02:16,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:02:16,345 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-17 08:02:16,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:02:16,499 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-17 08:02:16,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:02:16,634 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-17 08:02:16,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:02:16,759 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-17 08:02:16,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:02:16,874 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-17 08:02:16,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:02:16,982 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-17 08:02:16,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:02:17,080 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-17 08:02:17,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:02:17,167 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-17 08:02:17,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:02:17,249 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-17 08:02:17,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:02:17,322 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-17 08:02:17,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:02:17,387 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-17 08:02:17,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:02:17,445 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-17 08:02:17,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:02:17,499 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-17 08:02:17,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:02:17,546 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-17 08:02:17,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:02:17,589 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-17 08:02:17,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:02:17,628 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-17 08:02:17,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:02:17,665 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-17 08:02:17,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:02:17,698 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-17 08:02:17,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:02:17,730 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-17 08:02:17,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:02:17,769 INFO L134 CoverageAnalysis]: Checked inductivity of 5904 backedges. 0 proven. 2542 refuted. 0 times theorem prover too weak. 3362 trivial. 0 not checked. [2023-02-17 08:02:17,769 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 08:02:17,769 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [474502419] [2023-02-17 08:02:17,769 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [474502419] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 08:02:17,769 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [757265448] [2023-02-17 08:02:17,770 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-17 08:02:17,770 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 08:02:17,770 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 08:02:17,773 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-17 08:02:17,774 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process