./Ultimate.py --spec ../sv-benchmarks/c/properties/no-overflow.prp --file ../sv-benchmarks/c/termination-numeric/Ackermann01-1.c --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for overflows 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/termination-numeric/Ackermann01-1.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Overflow-64bit-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 ! overflow) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash 380ed529f726f53285b49ce40e57404dbe066b029b8c3af7ce337366515780a5 --- Real Ultimate output --- This is Ultimate 0.2.2-?-574ddb4 [2023-02-17 09:25:23,891 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-02-17 09:25:23,892 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-02-17 09:25:23,914 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-02-17 09:25:23,914 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-02-17 09:25:23,915 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-02-17 09:25:23,916 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-02-17 09:25:23,917 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-02-17 09:25:23,918 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-02-17 09:25:23,919 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-02-17 09:25:23,919 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-02-17 09:25:23,920 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-02-17 09:25:23,920 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-02-17 09:25:23,921 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-02-17 09:25:23,922 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-02-17 09:25:23,923 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-02-17 09:25:23,923 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-02-17 09:25:23,924 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-02-17 09:25:23,925 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-02-17 09:25:23,927 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-02-17 09:25:23,928 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-02-17 09:25:23,929 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-02-17 09:25:23,930 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-02-17 09:25:23,930 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-02-17 09:25:23,933 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-02-17 09:25:23,933 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-02-17 09:25:23,933 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-02-17 09:25:23,934 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-02-17 09:25:23,935 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-02-17 09:25:23,935 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-02-17 09:25:23,936 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-02-17 09:25:23,936 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-02-17 09:25:23,937 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-02-17 09:25:23,937 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-02-17 09:25:23,938 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-02-17 09:25:23,938 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-02-17 09:25:23,939 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-02-17 09:25:23,939 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-02-17 09:25:23,939 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-02-17 09:25:23,939 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-02-17 09:25:23,940 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-02-17 09:25:23,942 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Overflow-64bit-Automizer_Default.epf [2023-02-17 09:25:23,960 INFO L113 SettingsManager]: Loading preferences was successful [2023-02-17 09:25:23,961 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-02-17 09:25:23,961 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-02-17 09:25:23,961 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-02-17 09:25:23,962 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-02-17 09:25:23,962 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-02-17 09:25:23,963 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-02-17 09:25:23,963 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-02-17 09:25:23,963 INFO L138 SettingsManager]: * Use SBE=true [2023-02-17 09:25:23,963 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-02-17 09:25:23,964 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-02-17 09:25:23,964 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-02-17 09:25:23,964 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-02-17 09:25:23,964 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-02-17 09:25:23,964 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-02-17 09:25:23,965 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-02-17 09:25:23,965 INFO L138 SettingsManager]: * Check absence of signed integer overflows=true [2023-02-17 09:25:23,965 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-02-17 09:25:23,965 INFO L138 SettingsManager]: * Use constant arrays=true [2023-02-17 09:25:23,965 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-02-17 09:25:23,965 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-02-17 09:25:23,966 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-02-17 09:25:23,966 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-02-17 09:25:23,966 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-17 09:25:23,966 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-02-17 09:25:23,966 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-02-17 09:25:23,966 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-02-17 09:25:23,966 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-02-17 09:25:23,967 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-02-17 09:25:23,967 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-02-17 09:25:23,967 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-02-17 09:25:23,967 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-02-17 09:25:23,967 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-02-17 09:25:23,967 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-02-17 09:25:23,968 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 380ed529f726f53285b49ce40e57404dbe066b029b8c3af7ce337366515780a5 [2023-02-17 09:25:24,140 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-02-17 09:25:24,162 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-02-17 09:25:24,164 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-02-17 09:25:24,165 INFO L271 PluginConnector]: Initializing CDTParser... [2023-02-17 09:25:24,165 INFO L275 PluginConnector]: CDTParser initialized [2023-02-17 09:25:24,166 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/termination-numeric/Ackermann01-1.c [2023-02-17 09:25:25,100 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-02-17 09:25:25,229 INFO L351 CDTParser]: Found 1 translation units. [2023-02-17 09:25:25,230 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/termination-numeric/Ackermann01-1.c [2023-02-17 09:25:25,234 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1baf7cc09/4ff72509db5c4548b4de64b275351ada/FLAG7d50f37f5 [2023-02-17 09:25:25,680 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1baf7cc09/4ff72509db5c4548b4de64b275351ada [2023-02-17 09:25:25,683 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-02-17 09:25:25,684 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-02-17 09:25:25,685 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-02-17 09:25:25,685 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-02-17 09:25:25,688 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-02-17 09:25:25,688 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.02 09:25:25" (1/1) ... [2023-02-17 09:25:25,691 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@79f49df and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 09:25:25, skipping insertion in model container [2023-02-17 09:25:25,691 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.02 09:25:25" (1/1) ... [2023-02-17 09:25:25,695 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-02-17 09:25:25,706 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-02-17 09:25:25,804 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/termination-numeric/Ackermann01-1.c[944,957] [2023-02-17 09:25:25,804 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-17 09:25:25,811 INFO L203 MainTranslator]: Completed pre-run [2023-02-17 09:25:25,831 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/termination-numeric/Ackermann01-1.c[944,957] [2023-02-17 09:25:25,832 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-17 09:25:25,841 INFO L208 MainTranslator]: Completed translation [2023-02-17 09:25:25,841 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 09:25:25 WrapperNode [2023-02-17 09:25:25,841 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-02-17 09:25:25,842 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-02-17 09:25:25,842 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-02-17 09:25:25,842 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-02-17 09:25:25,846 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 09:25:25" (1/1) ... [2023-02-17 09:25:25,850 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 09:25:25" (1/1) ... [2023-02-17 09:25:25,859 INFO L138 Inliner]: procedures = 13, calls = 11, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 32 [2023-02-17 09:25:25,859 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-02-17 09:25:25,860 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-02-17 09:25:25,860 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-02-17 09:25:25,860 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-02-17 09:25:25,866 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 09:25:25" (1/1) ... [2023-02-17 09:25:25,866 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 09:25:25" (1/1) ... [2023-02-17 09:25:25,867 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 09:25:25" (1/1) ... [2023-02-17 09:25:25,867 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 09:25:25" (1/1) ... [2023-02-17 09:25:25,868 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 09:25:25" (1/1) ... [2023-02-17 09:25:25,870 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 09:25:25" (1/1) ... [2023-02-17 09:25:25,870 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 09:25:25" (1/1) ... [2023-02-17 09:25:25,871 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 09:25:25" (1/1) ... [2023-02-17 09:25:25,874 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-02-17 09:25:25,876 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-02-17 09:25:25,876 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-02-17 09:25:25,876 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-02-17 09:25:25,877 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 09:25:25" (1/1) ... [2023-02-17 09:25:25,883 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-17 09:25:25,890 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 09:25:25,900 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 09:25:25,916 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 09:25:25,932 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-02-17 09:25:25,932 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-02-17 09:25:25,933 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-02-17 09:25:25,933 INFO L130 BoogieDeclarations]: Found specification of procedure ackermann [2023-02-17 09:25:25,933 INFO L138 BoogieDeclarations]: Found implementation of procedure ackermann [2023-02-17 09:25:25,933 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-02-17 09:25:25,983 INFO L235 CfgBuilder]: Building ICFG [2023-02-17 09:25:25,985 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2023-02-17 09:25:26,132 INFO L276 CfgBuilder]: Performing block encoding [2023-02-17 09:25:26,139 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-02-17 09:25:26,141 INFO L300 CfgBuilder]: Removed 0 assume(true) statements. [2023-02-17 09:25:26,142 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.02 09:25:26 BoogieIcfgContainer [2023-02-17 09:25:26,145 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-02-17 09:25:26,146 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-02-17 09:25:26,146 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-02-17 09:25:26,149 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-02-17 09:25:26,150 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.02 09:25:25" (1/3) ... [2023-02-17 09:25:26,150 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@57617c2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.02 09:25:26, skipping insertion in model container [2023-02-17 09:25:26,150 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 09:25:25" (2/3) ... [2023-02-17 09:25:26,150 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@57617c2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.02 09:25:26, skipping insertion in model container [2023-02-17 09:25:26,150 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.02 09:25:26" (3/3) ... [2023-02-17 09:25:26,151 INFO L112 eAbstractionObserver]: Analyzing ICFG Ackermann01-1.c [2023-02-17 09:25:26,175 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-02-17 09:25:26,175 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 8 error locations. [2023-02-17 09:25:26,229 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-02-17 09:25:26,234 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;@74e1c306, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-02-17 09:25:26,234 INFO L358 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2023-02-17 09:25:26,238 INFO L276 IsEmpty]: Start isEmpty. Operand has 38 states, 24 states have (on average 1.5416666666666667) internal successors, (37), 32 states have internal predecessors, (37), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-02-17 09:25:26,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-02-17 09:25:26,242 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 09:25:26,243 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 09:25:26,244 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2023-02-17 09:25:26,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 09:25:26,247 INFO L85 PathProgramCache]: Analyzing trace with hash 180762217, now seen corresponding path program 1 times [2023-02-17 09:25:26,253 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 09:25:26,254 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [413444717] [2023-02-17 09:25:26,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 09:25:26,254 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 09:25:26,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 09:25:26,376 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 09:25:26,376 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 09:25:26,376 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [413444717] [2023-02-17 09:25:26,377 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [413444717] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 09:25:26,377 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 09:25:26,377 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-17 09:25:26,378 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [133190576] [2023-02-17 09:25:26,379 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 09:25:26,381 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-17 09:25:26,381 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 09:25:26,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-17 09:25:26,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-02-17 09:25:26,406 INFO L87 Difference]: Start difference. First operand has 38 states, 24 states have (on average 1.5416666666666667) internal successors, (37), 32 states have internal predecessors, (37), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 5 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 09:25:26,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 09:25:26,493 INFO L93 Difference]: Finished difference Result 73 states and 85 transitions. [2023-02-17 09:25:26,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-17 09:25:26,495 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2023-02-17 09:25:26,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 09:25:26,500 INFO L225 Difference]: With dead ends: 73 [2023-02-17 09:25:26,501 INFO L226 Difference]: Without dead ends: 59 [2023-02-17 09:25:26,502 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 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 09:25:26,504 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 55 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-17 09:25:26,505 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [57 Valid, 119 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-17 09:25:26,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2023-02-17 09:25:26,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 51. [2023-02-17 09:25:26,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 34 states have (on average 1.5294117647058822) internal successors, (52), 42 states have internal predecessors, (52), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-02-17 09:25:26,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 65 transitions. [2023-02-17 09:25:26,549 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 65 transitions. Word has length 8 [2023-02-17 09:25:26,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 09:25:26,550 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 65 transitions. [2023-02-17 09:25:26,550 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 09:25:26,551 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 65 transitions. [2023-02-17 09:25:26,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2023-02-17 09:25:26,553 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 09:25:26,553 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 09:25:26,554 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-02-17 09:25:26,554 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2023-02-17 09:25:26,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 09:25:26,554 INFO L85 PathProgramCache]: Analyzing trace with hash 1308666490, now seen corresponding path program 1 times [2023-02-17 09:25:26,554 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 09:25:26,555 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2147192346] [2023-02-17 09:25:26,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 09:25:26,555 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 09:25:26,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 09:25:26,618 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 09:25:26,618 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 09:25:26,618 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2147192346] [2023-02-17 09:25:26,619 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2147192346] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 09:25:26,619 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 09:25:26,619 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-17 09:25:26,619 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1827130944] [2023-02-17 09:25:26,619 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 09:25:26,620 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-17 09:25:26,620 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 09:25:26,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-17 09:25:26,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-02-17 09:25:26,621 INFO L87 Difference]: Start difference. First operand 51 states and 65 transitions. Second operand has 5 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 09:25:26,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 09:25:26,704 INFO L93 Difference]: Finished difference Result 101 states and 137 transitions. [2023-02-17 09:25:26,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-17 09:25:26,705 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2023-02-17 09:25:26,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 09:25:26,706 INFO L225 Difference]: With dead ends: 101 [2023-02-17 09:25:26,706 INFO L226 Difference]: Without dead ends: 95 [2023-02-17 09:25:26,707 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 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 09:25:26,707 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 48 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-17 09:25:26,708 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 91 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-17 09:25:26,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2023-02-17 09:25:26,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 85. [2023-02-17 09:25:26,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 61 states have (on average 1.5081967213114753) internal successors, (92), 70 states have internal predecessors, (92), 13 states have call successors, (13), 4 states have call predecessors, (13), 3 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2023-02-17 09:25:26,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 115 transitions. [2023-02-17 09:25:26,718 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 115 transitions. Word has length 9 [2023-02-17 09:25:26,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 09:25:26,719 INFO L495 AbstractCegarLoop]: Abstraction has 85 states and 115 transitions. [2023-02-17 09:25:26,719 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 09:25:26,719 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 115 transitions. [2023-02-17 09:25:26,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2023-02-17 09:25:26,719 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 09:25:26,719 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 09:25:26,719 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-02-17 09:25:26,720 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2023-02-17 09:25:26,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 09:25:26,720 INFO L85 PathProgramCache]: Analyzing trace with hash 1308661493, now seen corresponding path program 1 times [2023-02-17 09:25:26,720 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 09:25:26,720 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1829191812] [2023-02-17 09:25:26,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 09:25:26,740 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 09:25:26,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 09:25:26,794 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 09:25:26,795 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 09:25:26,795 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1829191812] [2023-02-17 09:25:26,795 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1829191812] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 09:25:26,795 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 09:25:26,795 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-17 09:25:26,795 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [783101177] [2023-02-17 09:25:26,795 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 09:25:26,796 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-17 09:25:26,796 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 09:25:26,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-17 09:25:26,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-02-17 09:25:26,796 INFO L87 Difference]: Start difference. First operand 85 states and 115 transitions. Second operand has 5 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 09:25:26,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 09:25:26,854 INFO L93 Difference]: Finished difference Result 114 states and 152 transitions. [2023-02-17 09:25:26,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-17 09:25:26,857 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2023-02-17 09:25:26,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 09:25:26,858 INFO L225 Difference]: With dead ends: 114 [2023-02-17 09:25:26,858 INFO L226 Difference]: Without dead ends: 110 [2023-02-17 09:25:26,859 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 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 09:25:26,860 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 49 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-17 09:25:26,860 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 93 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-17 09:25:26,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2023-02-17 09:25:26,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 102. [2023-02-17 09:25:26,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 74 states have (on average 1.445945945945946) internal successors, (107), 83 states have internal predecessors, (107), 16 states have call successors, (16), 5 states have call predecessors, (16), 4 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2023-02-17 09:25:26,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 136 transitions. [2023-02-17 09:25:26,879 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 136 transitions. Word has length 9 [2023-02-17 09:25:26,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 09:25:26,879 INFO L495 AbstractCegarLoop]: Abstraction has 102 states and 136 transitions. [2023-02-17 09:25:26,879 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 09:25:26,879 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 136 transitions. [2023-02-17 09:25:26,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-02-17 09:25:26,879 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 09:25:26,880 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 09:25:26,880 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-02-17 09:25:26,880 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ackermannErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2023-02-17 09:25:26,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 09:25:26,880 INFO L85 PathProgramCache]: Analyzing trace with hash 1913955596, now seen corresponding path program 1 times [2023-02-17 09:25:26,880 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 09:25:26,881 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2126547726] [2023-02-17 09:25:26,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 09:25:26,881 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 09:25:26,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 09:25:26,929 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 09:25:26,929 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 09:25:26,929 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2126547726] [2023-02-17 09:25:26,930 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2126547726] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 09:25:26,930 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 09:25:26,930 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-17 09:25:26,930 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1812767737] [2023-02-17 09:25:26,930 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 09:25:26,930 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-17 09:25:26,930 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 09:25:26,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-17 09:25:26,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-02-17 09:25:26,931 INFO L87 Difference]: Start difference. First operand 102 states and 136 transitions. Second operand has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 09:25:26,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 09:25:26,981 INFO L93 Difference]: Finished difference Result 102 states and 136 transitions. [2023-02-17 09:25:26,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-02-17 09:25:26,982 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2023-02-17 09:25:26,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 09:25:26,982 INFO L225 Difference]: With dead ends: 102 [2023-02-17 09:25:26,983 INFO L226 Difference]: Without dead ends: 100 [2023-02-17 09:25:26,983 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 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 09:25:26,984 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 42 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-17 09:25:26,984 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 45 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-17 09:25:26,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2023-02-17 09:25:26,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 100. [2023-02-17 09:25:26,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 74 states have (on average 1.3108108108108107) internal successors, (97), 81 states have internal predecessors, (97), 16 states have call successors, (16), 5 states have call predecessors, (16), 4 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2023-02-17 09:25:26,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 126 transitions. [2023-02-17 09:25:26,997 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 126 transitions. Word has length 10 [2023-02-17 09:25:26,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 09:25:26,998 INFO L495 AbstractCegarLoop]: Abstraction has 100 states and 126 transitions. [2023-02-17 09:25:26,998 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 09:25:26,998 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 126 transitions. [2023-02-17 09:25:26,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-02-17 09:25:26,998 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 09:25:26,998 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 09:25:26,998 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-02-17 09:25:26,999 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2023-02-17 09:25:26,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 09:25:26,999 INFO L85 PathProgramCache]: Analyzing trace with hash 1669645175, now seen corresponding path program 1 times [2023-02-17 09:25:26,999 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 09:25:26,999 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1501242810] [2023-02-17 09:25:26,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 09:25:27,000 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 09:25:27,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 09:25:27,048 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 09:25:27,049 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 09:25:27,049 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1501242810] [2023-02-17 09:25:27,049 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1501242810] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 09:25:27,049 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 09:25:27,049 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-17 09:25:27,050 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [951609251] [2023-02-17 09:25:27,050 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 09:25:27,050 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-17 09:25:27,050 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 09:25:27,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-17 09:25:27,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-17 09:25:27,051 INFO L87 Difference]: Start difference. First operand 100 states and 126 transitions. Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 states have internal predecessors, (13), 1 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 09:25:27,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 09:25:27,082 INFO L93 Difference]: Finished difference Result 168 states and 221 transitions. [2023-02-17 09:25:27,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-17 09:25:27,083 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 states have internal predecessors, (13), 1 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2023-02-17 09:25:27,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 09:25:27,084 INFO L225 Difference]: With dead ends: 168 [2023-02-17 09:25:27,084 INFO L226 Difference]: Without dead ends: 97 [2023-02-17 09:25:27,085 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-02-17 09:25:27,086 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 26 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-17 09:25:27,086 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 88 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-17 09:25:27,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2023-02-17 09:25:27,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 96. [2023-02-17 09:25:27,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 71 states have (on average 1.295774647887324) internal successors, (92), 78 states have internal predecessors, (92), 15 states have call successors, (15), 5 states have call predecessors, (15), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2023-02-17 09:25:27,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 119 transitions. [2023-02-17 09:25:27,094 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 119 transitions. Word has length 15 [2023-02-17 09:25:27,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 09:25:27,094 INFO L495 AbstractCegarLoop]: Abstraction has 96 states and 119 transitions. [2023-02-17 09:25:27,094 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 states have internal predecessors, (13), 1 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 09:25:27,095 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 119 transitions. [2023-02-17 09:25:27,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-02-17 09:25:27,095 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 09:25:27,095 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 09:25:27,095 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-02-17 09:25:27,096 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ackermannErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2023-02-17 09:25:27,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 09:25:27,096 INFO L85 PathProgramCache]: Analyzing trace with hash 1669645399, now seen corresponding path program 1 times [2023-02-17 09:25:27,096 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 09:25:27,097 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1087152540] [2023-02-17 09:25:27,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 09:25:27,097 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 09:25:27,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 09:25:27,170 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 09:25:27,170 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 09:25:27,170 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1087152540] [2023-02-17 09:25:27,171 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1087152540] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 09:25:27,171 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1447984652] [2023-02-17 09:25:27,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 09:25:27,171 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 09:25:27,171 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 09:25:27,182 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 09:25:27,184 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 09:25:27,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 09:25:27,220 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 6 conjunts are in the unsatisfiable core [2023-02-17 09:25:27,223 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 09:25:27,252 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 09:25:27,253 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 09:25:27,290 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 09:25:27,290 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1447984652] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 09:25:27,290 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 09:25:27,291 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 11 [2023-02-17 09:25:27,291 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1207107648] [2023-02-17 09:25:27,291 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 09:25:27,291 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-02-17 09:25:27,291 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 09:25:27,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-02-17 09:25:27,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2023-02-17 09:25:27,293 INFO L87 Difference]: Start difference. First operand 96 states and 119 transitions. Second operand has 12 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 8 states have internal predecessors, (24), 4 states have call successors, (4), 4 states have call predecessors, (4), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 09:25:27,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 09:25:27,480 INFO L93 Difference]: Finished difference Result 274 states and 356 transitions. [2023-02-17 09:25:27,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-02-17 09:25:27,480 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 8 states have internal predecessors, (24), 4 states have call successors, (4), 4 states have call predecessors, (4), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2023-02-17 09:25:27,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 09:25:27,486 INFO L225 Difference]: With dead ends: 274 [2023-02-17 09:25:27,487 INFO L226 Difference]: Without dead ends: 272 [2023-02-17 09:25:27,490 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=104, Invalid=238, Unknown=0, NotChecked=0, Total=342 [2023-02-17 09:25:27,496 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 236 mSDsluCounter, 134 mSDsCounter, 0 mSdLazyCounter, 151 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 242 SdHoareTripleChecker+Valid, 163 SdHoareTripleChecker+Invalid, 242 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 151 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-17 09:25:27,496 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [242 Valid, 163 Invalid, 242 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 151 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-17 09:25:27,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2023-02-17 09:25:27,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 236. [2023-02-17 09:25:27,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 236 states, 182 states have (on average 1.2637362637362637) internal successors, (230), 189 states have internal predecessors, (230), 36 states have call successors, (36), 13 states have call predecessors, (36), 12 states have return successors, (33), 33 states have call predecessors, (33), 33 states have call successors, (33) [2023-02-17 09:25:27,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 299 transitions. [2023-02-17 09:25:27,515 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 299 transitions. Word has length 15 [2023-02-17 09:25:27,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 09:25:27,515 INFO L495 AbstractCegarLoop]: Abstraction has 236 states and 299 transitions. [2023-02-17 09:25:27,515 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 8 states have internal predecessors, (24), 4 states have call successors, (4), 4 states have call predecessors, (4), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 09:25:27,515 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 299 transitions. [2023-02-17 09:25:27,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-02-17 09:25:27,516 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 09:25:27,516 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 09:25:27,525 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-02-17 09:25:27,720 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-02-17 09:25:27,720 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2023-02-17 09:25:27,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 09:25:27,721 INFO L85 PathProgramCache]: Analyzing trace with hash 1422985811, now seen corresponding path program 1 times [2023-02-17 09:25:27,721 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 09:25:27,721 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2012206092] [2023-02-17 09:25:27,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 09:25:27,721 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 09:25:27,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 09:25:27,769 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 09:25:27,769 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 09:25:27,769 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2012206092] [2023-02-17 09:25:27,769 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2012206092] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 09:25:27,769 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1962026856] [2023-02-17 09:25:27,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 09:25:27,769 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 09:25:27,769 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 09:25:27,770 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 09:25:27,800 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 09:25:27,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 09:25:27,811 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjunts are in the unsatisfiable core [2023-02-17 09:25:27,812 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 09:25:27,865 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 09:25:27,865 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 09:25:27,910 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 09:25:27,911 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1962026856] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 09:25:27,911 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 09:25:27,912 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 11 [2023-02-17 09:25:27,912 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1322154000] [2023-02-17 09:25:27,912 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 09:25:27,912 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-02-17 09:25:27,912 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 09:25:27,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-02-17 09:25:27,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2023-02-17 09:25:27,914 INFO L87 Difference]: Start difference. First operand 236 states and 299 transitions. Second operand has 12 states, 10 states have (on average 2.6) internal successors, (26), 8 states have internal predecessors, (26), 4 states have call successors, (4), 4 states have call predecessors, (4), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 09:25:28,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 09:25:28,099 INFO L93 Difference]: Finished difference Result 512 states and 695 transitions. [2023-02-17 09:25:28,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-02-17 09:25:28,099 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 2.6) internal successors, (26), 8 states have internal predecessors, (26), 4 states have call successors, (4), 4 states have call predecessors, (4), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2023-02-17 09:25:28,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 09:25:28,102 INFO L225 Difference]: With dead ends: 512 [2023-02-17 09:25:28,103 INFO L226 Difference]: Without dead ends: 510 [2023-02-17 09:25:28,103 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 21 SyntacticMatches, 5 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=116, Invalid=264, Unknown=0, NotChecked=0, Total=380 [2023-02-17 09:25:28,105 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 164 mSDsluCounter, 150 mSDsCounter, 0 mSdLazyCounter, 192 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 167 SdHoareTripleChecker+Valid, 178 SdHoareTripleChecker+Invalid, 250 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 192 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-17 09:25:28,105 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [167 Valid, 178 Invalid, 250 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 192 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-17 09:25:28,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 510 states. [2023-02-17 09:25:28,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 510 to 445. [2023-02-17 09:25:28,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 445 states, 347 states have (on average 1.2276657060518732) internal successors, (426), 354 states have internal predecessors, (426), 69 states have call successors, (69), 24 states have call predecessors, (69), 23 states have return successors, (66), 66 states have call predecessors, (66), 66 states have call successors, (66) [2023-02-17 09:25:28,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 445 states to 445 states and 561 transitions. [2023-02-17 09:25:28,146 INFO L78 Accepts]: Start accepts. Automaton has 445 states and 561 transitions. Word has length 16 [2023-02-17 09:25:28,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 09:25:28,146 INFO L495 AbstractCegarLoop]: Abstraction has 445 states and 561 transitions. [2023-02-17 09:25:28,147 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 2.6) internal successors, (26), 8 states have internal predecessors, (26), 4 states have call successors, (4), 4 states have call predecessors, (4), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 09:25:28,147 INFO L276 IsEmpty]: Start isEmpty. Operand 445 states and 561 transitions. [2023-02-17 09:25:28,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-02-17 09:25:28,149 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 09:25:28,149 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 09:25:28,156 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 09:25:28,353 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2023-02-17 09:25:28,354 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2023-02-17 09:25:28,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 09:25:28,357 INFO L85 PathProgramCache]: Analyzing trace with hash 1106403678, now seen corresponding path program 1 times [2023-02-17 09:25:28,357 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 09:25:28,357 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [901448622] [2023-02-17 09:25:28,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 09:25:28,357 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 09:25:28,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 09:25:28,403 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-02-17 09:25:28,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 09:25:28,423 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-17 09:25:28,423 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 09:25:28,423 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [901448622] [2023-02-17 09:25:28,423 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [901448622] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 09:25:28,423 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [929165092] [2023-02-17 09:25:28,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 09:25:28,423 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 09:25:28,423 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 09:25:28,429 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 09:25:28,432 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 09:25:28,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 09:25:28,459 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 6 conjunts are in the unsatisfiable core [2023-02-17 09:25:28,460 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 09:25:28,488 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-17 09:25:28,488 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-17 09:25:28,488 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [929165092] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 09:25:28,488 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-02-17 09:25:28,488 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7] total 12 [2023-02-17 09:25:28,489 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [217865984] [2023-02-17 09:25:28,489 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 09:25:28,489 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-02-17 09:25:28,489 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 09:25:28,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-02-17 09:25:28,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2023-02-17 09:25:28,490 INFO L87 Difference]: Start difference. First operand 445 states and 561 transitions. Second operand has 7 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-17 09:25:28,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 09:25:28,578 INFO L93 Difference]: Finished difference Result 478 states and 600 transitions. [2023-02-17 09:25:28,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-02-17 09:25:28,579 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 24 [2023-02-17 09:25:28,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 09:25:28,580 INFO L225 Difference]: With dead ends: 478 [2023-02-17 09:25:28,580 INFO L226 Difference]: Without dead ends: 477 [2023-02-17 09:25:28,581 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2023-02-17 09:25:28,581 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 45 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-17 09:25:28,581 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 124 Invalid, 112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-17 09:25:28,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 477 states. [2023-02-17 09:25:28,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 477 to 444. [2023-02-17 09:25:28,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 444 states, 347 states have (on average 1.2161383285302594) internal successors, (422), 353 states have internal predecessors, (422), 69 states have call successors, (69), 24 states have call predecessors, (69), 23 states have return successors, (66), 66 states have call predecessors, (66), 66 states have call successors, (66) [2023-02-17 09:25:28,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 444 states to 444 states and 557 transitions. [2023-02-17 09:25:28,596 INFO L78 Accepts]: Start accepts. Automaton has 444 states and 557 transitions. Word has length 24 [2023-02-17 09:25:28,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 09:25:28,596 INFO L495 AbstractCegarLoop]: Abstraction has 444 states and 557 transitions. [2023-02-17 09:25:28,596 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-17 09:25:28,596 INFO L276 IsEmpty]: Start isEmpty. Operand 444 states and 557 transitions. [2023-02-17 09:25:28,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-02-17 09:25:28,597 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 09:25:28,597 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 09:25:28,605 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 09:25:28,801 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 09:25:28,802 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2023-02-17 09:25:28,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 09:25:28,802 INFO L85 PathProgramCache]: Analyzing trace with hash -61224288, now seen corresponding path program 1 times [2023-02-17 09:25:28,802 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 09:25:28,802 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1805474864] [2023-02-17 09:25:28,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 09:25:28,802 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 09:25:28,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 09:25:28,854 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-02-17 09:25:28,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 09:25:28,875 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-17 09:25:28,876 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 09:25:28,876 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1805474864] [2023-02-17 09:25:28,876 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1805474864] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 09:25:28,876 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1058528451] [2023-02-17 09:25:28,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 09:25:28,876 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 09:25:28,877 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 09:25:28,878 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 09:25:28,880 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 09:25:28,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 09:25:28,909 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 10 conjunts are in the unsatisfiable core [2023-02-17 09:25:28,911 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 09:25:28,958 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-17 09:25:28,958 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 09:25:29,044 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-17 09:25:29,044 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1058528451] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 09:25:29,044 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 09:25:29,044 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 19 [2023-02-17 09:25:29,045 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1455524813] [2023-02-17 09:25:29,045 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 09:25:29,045 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-02-17 09:25:29,045 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 09:25:29,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-02-17 09:25:29,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=299, Unknown=0, NotChecked=0, Total=342 [2023-02-17 09:25:29,046 INFO L87 Difference]: Start difference. First operand 444 states and 557 transitions. Second operand has 19 states, 17 states have (on average 3.235294117647059) internal successors, (55), 16 states have internal predecessors, (55), 8 states have call successors, (9), 4 states have call predecessors, (9), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-17 09:25:29,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 09:25:29,412 INFO L93 Difference]: Finished difference Result 1120 states and 1574 transitions. [2023-02-17 09:25:29,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-02-17 09:25:29,412 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 17 states have (on average 3.235294117647059) internal successors, (55), 16 states have internal predecessors, (55), 8 states have call successors, (9), 4 states have call predecessors, (9), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 25 [2023-02-17 09:25:29,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 09:25:29,415 INFO L225 Difference]: With dead ends: 1120 [2023-02-17 09:25:29,415 INFO L226 Difference]: Without dead ends: 780 [2023-02-17 09:25:29,417 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 42 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=218, Invalid=904, Unknown=0, NotChecked=0, Total=1122 [2023-02-17 09:25:29,418 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 254 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 473 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 254 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 566 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 473 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-17 09:25:29,418 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [254 Valid, 91 Invalid, 566 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 473 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-17 09:25:29,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 780 states. [2023-02-17 09:25:29,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 780 to 578. [2023-02-17 09:25:29,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 578 states, 449 states have (on average 1.2115812917594655) internal successors, (544), 468 states have internal predecessors, (544), 86 states have call successors, (86), 36 states have call predecessors, (86), 38 states have return successors, (90), 73 states have call predecessors, (90), 66 states have call successors, (90) [2023-02-17 09:25:29,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 578 states to 578 states and 720 transitions. [2023-02-17 09:25:29,441 INFO L78 Accepts]: Start accepts. Automaton has 578 states and 720 transitions. Word has length 25 [2023-02-17 09:25:29,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 09:25:29,441 INFO L495 AbstractCegarLoop]: Abstraction has 578 states and 720 transitions. [2023-02-17 09:25:29,441 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 17 states have (on average 3.235294117647059) internal successors, (55), 16 states have internal predecessors, (55), 8 states have call successors, (9), 4 states have call predecessors, (9), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-17 09:25:29,441 INFO L276 IsEmpty]: Start isEmpty. Operand 578 states and 720 transitions. [2023-02-17 09:25:29,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-02-17 09:25:29,442 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 09:25:29,442 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2023-02-17 09:25:29,451 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 09:25:29,647 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 09:25:29,647 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ackermannErr6ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2023-02-17 09:25:29,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 09:25:29,647 INFO L85 PathProgramCache]: Analyzing trace with hash -1846384600, now seen corresponding path program 1 times [2023-02-17 09:25:29,647 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 09:25:29,647 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1117673135] [2023-02-17 09:25:29,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 09:25:29,647 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 09:25:29,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 09:25:29,705 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 09:25:29,705 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 09:25:29,705 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1117673135] [2023-02-17 09:25:29,705 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1117673135] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 09:25:29,705 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [388348544] [2023-02-17 09:25:29,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 09:25:29,705 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 09:25:29,705 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 09:25:29,706 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 09:25:29,708 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 09:25:29,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 09:25:29,737 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 8 conjunts are in the unsatisfiable core [2023-02-17 09:25:29,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 09:25:29,757 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 09:25:29,759 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 09:25:29,796 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 09:25:29,797 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [388348544] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 09:25:29,797 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 09:25:29,797 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 15 [2023-02-17 09:25:29,797 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1166661409] [2023-02-17 09:25:29,797 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 09:25:29,798 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-02-17 09:25:29,798 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 09:25:29,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-02-17 09:25:29,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2023-02-17 09:25:29,799 INFO L87 Difference]: Start difference. First operand 578 states and 720 transitions. Second operand has 16 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 10 states have internal predecessors, (45), 6 states have call successors, (6), 6 states have call predecessors, (6), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 09:25:30,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 09:25:30,014 INFO L93 Difference]: Finished difference Result 1048 states and 1335 transitions. [2023-02-17 09:25:30,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-02-17 09:25:30,014 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 10 states have internal predecessors, (45), 6 states have call successors, (6), 6 states have call predecessors, (6), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2023-02-17 09:25:30,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 09:25:30,018 INFO L225 Difference]: With dead ends: 1048 [2023-02-17 09:25:30,018 INFO L226 Difference]: Without dead ends: 1047 [2023-02-17 09:25:30,018 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 42 SyntacticMatches, 4 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=214, Invalid=488, Unknown=0, NotChecked=0, Total=702 [2023-02-17 09:25:30,019 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 270 mSDsluCounter, 210 mSDsCounter, 0 mSdLazyCounter, 284 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 273 SdHoareTripleChecker+Valid, 248 SdHoareTripleChecker+Invalid, 361 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 284 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-17 09:25:30,019 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [273 Valid, 248 Invalid, 361 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 284 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-17 09:25:30,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1047 states. [2023-02-17 09:25:30,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1047 to 894. [2023-02-17 09:25:30,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 894 states, 697 states have (on average 1.1764705882352942) internal successors, (820), 728 states have internal predecessors, (820), 130 states have call successors, (130), 56 states have call predecessors, (130), 62 states have return successors, (138), 109 states have call predecessors, (138), 102 states have call successors, (138) [2023-02-17 09:25:30,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 894 states to 894 states and 1088 transitions. [2023-02-17 09:25:30,066 INFO L78 Accepts]: Start accepts. Automaton has 894 states and 1088 transitions. Word has length 27 [2023-02-17 09:25:30,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 09:25:30,067 INFO L495 AbstractCegarLoop]: Abstraction has 894 states and 1088 transitions. [2023-02-17 09:25:30,067 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 10 states have internal predecessors, (45), 6 states have call successors, (6), 6 states have call predecessors, (6), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 09:25:30,067 INFO L276 IsEmpty]: Start isEmpty. Operand 894 states and 1088 transitions. [2023-02-17 09:25:30,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-02-17 09:25:30,068 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 09:25:30,069 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 09:25:30,073 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 09:25:30,275 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-02-17 09:25:30,275 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ackermannErr6ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2023-02-17 09:25:30,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 09:25:30,276 INFO L85 PathProgramCache]: Analyzing trace with hash 1298021223, now seen corresponding path program 1 times [2023-02-17 09:25:30,276 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 09:25:30,276 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1068148033] [2023-02-17 09:25:30,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 09:25:30,276 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 09:25:30,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 09:25:30,308 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-02-17 09:25:30,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 09:25:30,337 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-02-17 09:25:30,337 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 09:25:30,337 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1068148033] [2023-02-17 09:25:30,337 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1068148033] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 09:25:30,337 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1404965821] [2023-02-17 09:25:30,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 09:25:30,338 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 09:25:30,338 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 09:25:30,339 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 09:25:30,341 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 09:25:30,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 09:25:30,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 10 conjunts are in the unsatisfiable core [2023-02-17 09:25:30,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 09:25:30,384 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-02-17 09:25:30,384 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 09:25:30,443 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-02-17 09:25:30,443 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1404965821] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 09:25:30,443 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 09:25:30,443 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2023-02-17 09:25:30,445 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [898812268] [2023-02-17 09:25:30,445 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 09:25:30,445 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-02-17 09:25:30,445 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 09:25:30,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-02-17 09:25:30,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2023-02-17 09:25:30,446 INFO L87 Difference]: Start difference. First operand 894 states and 1088 transitions. Second operand has 15 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 13 states have internal predecessors, (37), 6 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-17 09:25:30,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 09:25:30,574 INFO L93 Difference]: Finished difference Result 1014 states and 1281 transitions. [2023-02-17 09:25:30,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-02-17 09:25:30,575 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 13 states have internal predecessors, (37), 6 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 27 [2023-02-17 09:25:30,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 09:25:30,578 INFO L225 Difference]: With dead ends: 1014 [2023-02-17 09:25:30,579 INFO L226 Difference]: Without dead ends: 1013 [2023-02-17 09:25:30,579 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 46 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=110, Invalid=352, Unknown=0, NotChecked=0, Total=462 [2023-02-17 09:25:30,579 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 134 mSDsluCounter, 111 mSDsCounter, 0 mSdLazyCounter, 180 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 131 SdHoareTripleChecker+Invalid, 236 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 180 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-17 09:25:30,580 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [134 Valid, 131 Invalid, 236 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 180 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-17 09:25:30,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1013 states. [2023-02-17 09:25:30,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1013 to 932. [2023-02-17 09:25:30,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 932 states, 730 states have (on average 1.1767123287671233) internal successors, (859), 757 states have internal predecessors, (859), 135 states have call successors, (135), 61 states have call predecessors, (135), 62 states have return successors, (138), 113 states have call predecessors, (138), 102 states have call successors, (138) [2023-02-17 09:25:30,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 932 states to 932 states and 1132 transitions. [2023-02-17 09:25:30,612 INFO L78 Accepts]: Start accepts. Automaton has 932 states and 1132 transitions. Word has length 27 [2023-02-17 09:25:30,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 09:25:30,612 INFO L495 AbstractCegarLoop]: Abstraction has 932 states and 1132 transitions. [2023-02-17 09:25:30,612 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 13 states have internal predecessors, (37), 6 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-17 09:25:30,612 INFO L276 IsEmpty]: Start isEmpty. Operand 932 states and 1132 transitions. [2023-02-17 09:25:30,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2023-02-17 09:25:30,613 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 09:25:30,613 INFO L195 NwaCegarLoop]: trace histogram [4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 09:25:30,620 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 09:25:30,818 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 09:25:30,818 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2023-02-17 09:25:30,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 09:25:30,819 INFO L85 PathProgramCache]: Analyzing trace with hash -722353775, now seen corresponding path program 1 times [2023-02-17 09:25:30,819 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 09:25:30,819 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1098226195] [2023-02-17 09:25:30,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 09:25:30,819 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 09:25:30,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 09:25:30,904 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-02-17 09:25:30,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 09:25:30,918 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-02-17 09:25:30,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 09:25:30,935 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-02-17 09:25:30,935 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 09:25:30,935 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1098226195] [2023-02-17 09:25:30,935 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1098226195] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 09:25:30,935 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1440420837] [2023-02-17 09:25:30,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 09:25:30,935 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 09:25:30,935 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 09:25:30,937 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 09:25:30,939 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 09:25:30,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 09:25:30,970 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 9 conjunts are in the unsatisfiable core [2023-02-17 09:25:30,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 09:25:30,995 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-02-17 09:25:30,995 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 09:25:31,074 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-02-17 09:25:31,074 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1440420837] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 09:25:31,074 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 09:25:31,074 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2023-02-17 09:25:31,075 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1491734622] [2023-02-17 09:25:31,075 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 09:25:31,075 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-02-17 09:25:31,075 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 09:25:31,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-02-17 09:25:31,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2023-02-17 09:25:31,076 INFO L87 Difference]: Start difference. First operand 932 states and 1132 transitions. Second operand has 18 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 14 states have internal predecessors, (43), 3 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (5), 4 states have call predecessors, (5), 1 states have call successors, (5) [2023-02-17 09:25:31,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 09:25:31,362 INFO L93 Difference]: Finished difference Result 1421 states and 2074 transitions. [2023-02-17 09:25:31,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-02-17 09:25:31,362 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 14 states have internal predecessors, (43), 3 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (5), 4 states have call predecessors, (5), 1 states have call successors, (5) Word has length 34 [2023-02-17 09:25:31,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 09:25:31,367 INFO L225 Difference]: With dead ends: 1421 [2023-02-17 09:25:31,367 INFO L226 Difference]: Without dead ends: 1419 [2023-02-17 09:25:31,368 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 62 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=188, Invalid=682, Unknown=0, NotChecked=0, Total=870 [2023-02-17 09:25:31,369 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 171 mSDsluCounter, 151 mSDsCounter, 0 mSdLazyCounter, 312 mSolverCounterSat, 165 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 171 SdHoareTripleChecker+Valid, 177 SdHoareTripleChecker+Invalid, 477 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 165 IncrementalHoareTripleChecker+Valid, 312 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-17 09:25:31,369 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [171 Valid, 177 Invalid, 477 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [165 Valid, 312 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-17 09:25:31,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1419 states. [2023-02-17 09:25:31,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1419 to 1226. [2023-02-17 09:25:31,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1226 states, 922 states have (on average 1.1637744034707158) internal successors, (1073), 960 states have internal predecessors, (1073), 192 states have call successors, (192), 68 states have call predecessors, (192), 107 states have return successors, (366), 197 states have call predecessors, (366), 158 states have call successors, (366) [2023-02-17 09:25:31,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1226 states to 1226 states and 1631 transitions. [2023-02-17 09:25:31,424 INFO L78 Accepts]: Start accepts. Automaton has 1226 states and 1631 transitions. Word has length 34 [2023-02-17 09:25:31,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 09:25:31,425 INFO L495 AbstractCegarLoop]: Abstraction has 1226 states and 1631 transitions. [2023-02-17 09:25:31,425 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 14 states have internal predecessors, (43), 3 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (5), 4 states have call predecessors, (5), 1 states have call successors, (5) [2023-02-17 09:25:31,425 INFO L276 IsEmpty]: Start isEmpty. Operand 1226 states and 1631 transitions. [2023-02-17 09:25:31,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2023-02-17 09:25:31,426 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 09:25:31,426 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 09:25:31,435 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-02-17 09:25:31,630 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 09:25:31,630 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ackermannErr6ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2023-02-17 09:25:31,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 09:25:31,631 INFO L85 PathProgramCache]: Analyzing trace with hash 1607744024, now seen corresponding path program 1 times [2023-02-17 09:25:31,631 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 09:25:31,631 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1904422636] [2023-02-17 09:25:31,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 09:25:31,631 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 09:25:31,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 09:25:31,687 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-02-17 09:25:31,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 09:25:31,703 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-02-17 09:25:31,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 09:25:31,727 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 14 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-02-17 09:25:31,727 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 09:25:31,727 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1904422636] [2023-02-17 09:25:31,727 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1904422636] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 09:25:31,727 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [912479798] [2023-02-17 09:25:31,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 09:25:31,727 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 09:25:31,728 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 09:25:31,729 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 09:25:31,730 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 09:25:31,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 09:25:31,760 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 9 conjunts are in the unsatisfiable core [2023-02-17 09:25:31,761 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 09:25:31,785 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 12 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-02-17 09:25:31,785 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 09:25:31,858 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-02-17 09:25:31,858 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [912479798] provided 1 perfect and 1 imperfect interpolant sequences [2023-02-17 09:25:31,858 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-02-17 09:25:31,858 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8, 8] total 17 [2023-02-17 09:25:31,858 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [638660400] [2023-02-17 09:25:31,858 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 09:25:31,858 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-02-17 09:25:31,858 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 09:25:31,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-02-17 09:25:31,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2023-02-17 09:25:31,859 INFO L87 Difference]: Start difference. First operand 1226 states and 1631 transitions. Second operand has 9 states, 8 states have (on average 3.5) internal successors, (28), 7 states have internal predecessors, (28), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-17 09:25:32,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 09:25:32,034 INFO L93 Difference]: Finished difference Result 1333 states and 1854 transitions. [2023-02-17 09:25:32,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-02-17 09:25:32,034 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 3.5) internal successors, (28), 7 states have internal predecessors, (28), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 36 [2023-02-17 09:25:32,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 09:25:32,040 INFO L225 Difference]: With dead ends: 1333 [2023-02-17 09:25:32,040 INFO L226 Difference]: Without dead ends: 1332 [2023-02-17 09:25:32,040 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 60 SyntacticMatches, 6 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=100, Invalid=550, Unknown=0, NotChecked=0, Total=650 [2023-02-17 09:25:32,041 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 70 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 166 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 209 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 166 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-17 09:25:32,041 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [76 Valid, 134 Invalid, 209 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 166 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-17 09:25:32,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1332 states. [2023-02-17 09:25:32,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1332 to 1234. [2023-02-17 09:25:32,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1234 states, 930 states have (on average 1.1591397849462366) internal successors, (1078), 964 states have internal predecessors, (1078), 196 states have call successors, (196), 68 states have call predecessors, (196), 103 states have return successors, (290), 201 states have call predecessors, (290), 162 states have call successors, (290) [2023-02-17 09:25:32,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1234 states to 1234 states and 1564 transitions. [2023-02-17 09:25:32,095 INFO L78 Accepts]: Start accepts. Automaton has 1234 states and 1564 transitions. Word has length 36 [2023-02-17 09:25:32,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 09:25:32,095 INFO L495 AbstractCegarLoop]: Abstraction has 1234 states and 1564 transitions. [2023-02-17 09:25:32,095 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 3.5) internal successors, (28), 7 states have internal predecessors, (28), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-17 09:25:32,095 INFO L276 IsEmpty]: Start isEmpty. Operand 1234 states and 1564 transitions. [2023-02-17 09:25:32,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-02-17 09:25:32,097 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 09:25:32,097 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 09:25:32,111 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 09:25:32,309 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-02-17 09:25:32,309 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ackermannErr6ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2023-02-17 09:25:32,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 09:25:32,309 INFO L85 PathProgramCache]: Analyzing trace with hash -1310665197, now seen corresponding path program 2 times [2023-02-17 09:25:32,310 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 09:25:32,310 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1204086255] [2023-02-17 09:25:32,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 09:25:32,310 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 09:25:32,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 09:25:32,392 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2023-02-17 09:25:32,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 09:25:32,413 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 2 proven. 40 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-02-17 09:25:32,413 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 09:25:32,413 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1204086255] [2023-02-17 09:25:32,414 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1204086255] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 09:25:32,414 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1315148789] [2023-02-17 09:25:32,414 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-17 09:25:32,414 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 09:25:32,414 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 09:25:32,415 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 09:25:32,417 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 09:25:32,447 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-17 09:25:32,447 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-17 09:25:32,448 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 14 conjunts are in the unsatisfiable core [2023-02-17 09:25:32,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 09:25:32,485 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 2 proven. 40 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-02-17 09:25:32,485 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 09:25:32,571 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 4 proven. 38 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-02-17 09:25:32,571 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1315148789] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 09:25:32,571 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 09:25:32,571 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 22 [2023-02-17 09:25:32,572 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1928295941] [2023-02-17 09:25:32,572 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 09:25:32,572 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-02-17 09:25:32,572 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 09:25:32,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-02-17 09:25:32,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2023-02-17 09:25:32,573 INFO L87 Difference]: Start difference. First operand 1234 states and 1564 transitions. Second operand has 23 states, 20 states have (on average 3.05) internal successors, (61), 17 states have internal predecessors, (61), 8 states have call successors, (10), 7 states have call predecessors, (10), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-17 09:25:32,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 09:25:32,900 INFO L93 Difference]: Finished difference Result 1514 states and 1957 transitions. [2023-02-17 09:25:32,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-02-17 09:25:32,901 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 20 states have (on average 3.05) internal successors, (61), 17 states have internal predecessors, (61), 8 states have call successors, (10), 7 states have call predecessors, (10), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 43 [2023-02-17 09:25:32,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 09:25:32,906 INFO L225 Difference]: With dead ends: 1514 [2023-02-17 09:25:32,906 INFO L226 Difference]: Without dead ends: 1513 [2023-02-17 09:25:32,907 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 69 SyntacticMatches, 8 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 318 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=420, Invalid=1302, Unknown=0, NotChecked=0, Total=1722 [2023-02-17 09:25:32,907 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 382 mSDsluCounter, 187 mSDsCounter, 0 mSdLazyCounter, 329 mSolverCounterSat, 136 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 382 SdHoareTripleChecker+Valid, 207 SdHoareTripleChecker+Invalid, 465 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 136 IncrementalHoareTripleChecker+Valid, 329 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-17 09:25:32,907 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [382 Valid, 207 Invalid, 465 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [136 Valid, 329 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-17 09:25:32,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1513 states. [2023-02-17 09:25:32,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1513 to 1270. [2023-02-17 09:25:32,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1270 states, 959 states have (on average 1.159541188738269) internal successors, (1112), 992 states have internal predecessors, (1112), 203 states have call successors, (203), 72 states have call predecessors, (203), 103 states have return successors, (290), 205 states have call predecessors, (290), 162 states have call successors, (290) [2023-02-17 09:25:32,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1270 states to 1270 states and 1605 transitions. [2023-02-17 09:25:32,960 INFO L78 Accepts]: Start accepts. Automaton has 1270 states and 1605 transitions. Word has length 43 [2023-02-17 09:25:32,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 09:25:32,960 INFO L495 AbstractCegarLoop]: Abstraction has 1270 states and 1605 transitions. [2023-02-17 09:25:32,960 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 20 states have (on average 3.05) internal successors, (61), 17 states have internal predecessors, (61), 8 states have call successors, (10), 7 states have call predecessors, (10), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-17 09:25:32,960 INFO L276 IsEmpty]: Start isEmpty. Operand 1270 states and 1605 transitions. [2023-02-17 09:25:32,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2023-02-17 09:25:32,962 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 09:25:32,962 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 09:25:32,974 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 09:25:33,174 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-02-17 09:25:33,174 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ackermannErr6ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2023-02-17 09:25:33,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 09:25:33,174 INFO L85 PathProgramCache]: Analyzing trace with hash -1058043410, now seen corresponding path program 2 times [2023-02-17 09:25:33,174 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 09:25:33,175 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [813993744] [2023-02-17 09:25:33,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 09:25:33,175 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 09:25:33,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 09:25:33,215 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-02-17 09:25:33,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 09:25:33,237 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-02-17 09:25:33,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 09:25:33,255 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 26 proven. 8 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-02-17 09:25:33,255 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 09:25:33,255 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [813993744] [2023-02-17 09:25:33,255 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [813993744] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 09:25:33,255 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1264800770] [2023-02-17 09:25:33,255 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-17 09:25:33,255 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 09:25:33,255 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 09:25:33,256 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 09:25:33,284 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 09:25:33,293 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-17 09:25:33,293 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-17 09:25:33,294 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 11 conjunts are in the unsatisfiable core [2023-02-17 09:25:33,295 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 09:25:33,325 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 24 proven. 10 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-02-17 09:25:33,325 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 09:25:33,398 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 28 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-02-17 09:25:33,399 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1264800770] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 09:25:33,399 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 09:25:33,399 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 21 [2023-02-17 09:25:33,400 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [262233723] [2023-02-17 09:25:33,400 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 09:25:33,400 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-02-17 09:25:33,400 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 09:25:33,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-02-17 09:25:33,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2023-02-17 09:25:33,401 INFO L87 Difference]: Start difference. First operand 1270 states and 1605 transitions. Second operand has 22 states, 21 states have (on average 2.9047619047619047) internal successors, (61), 16 states have internal predecessors, (61), 5 states have call successors, (7), 5 states have call predecessors, (7), 5 states have return successors, (5), 4 states have call predecessors, (5), 1 states have call successors, (5) [2023-02-17 09:25:34,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 09:25:34,046 INFO L93 Difference]: Finished difference Result 2781 states and 4049 transitions. [2023-02-17 09:25:34,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-02-17 09:25:34,047 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 2.9047619047619047) internal successors, (61), 16 states have internal predecessors, (61), 5 states have call successors, (7), 5 states have call predecessors, (7), 5 states have return successors, (5), 4 states have call predecessors, (5), 1 states have call successors, (5) Word has length 44 [2023-02-17 09:25:34,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 09:25:34,053 INFO L225 Difference]: With dead ends: 2781 [2023-02-17 09:25:34,054 INFO L226 Difference]: Without dead ends: 1922 [2023-02-17 09:25:34,059 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 78 SyntacticMatches, 8 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 499 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=582, Invalid=1968, Unknown=0, NotChecked=0, Total=2550 [2023-02-17 09:25:34,059 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 289 mSDsluCounter, 203 mSDsCounter, 0 mSdLazyCounter, 500 mSolverCounterSat, 369 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 289 SdHoareTripleChecker+Valid, 239 SdHoareTripleChecker+Invalid, 869 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 369 IncrementalHoareTripleChecker+Valid, 500 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-17 09:25:34,060 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [289 Valid, 239 Invalid, 869 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [369 Valid, 500 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-17 09:25:34,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1922 states. [2023-02-17 09:25:34,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1922 to 1449. [2023-02-17 09:25:34,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1449 states, 1096 states have (on average 1.1496350364963503) internal successors, (1260), 1135 states have internal predecessors, (1260), 227 states have call successors, (227), 86 states have call predecessors, (227), 121 states have return successors, (328), 227 states have call predecessors, (328), 181 states have call successors, (328) [2023-02-17 09:25:34,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1449 states to 1449 states and 1815 transitions. [2023-02-17 09:25:34,122 INFO L78 Accepts]: Start accepts. Automaton has 1449 states and 1815 transitions. Word has length 44 [2023-02-17 09:25:34,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 09:25:34,123 INFO L495 AbstractCegarLoop]: Abstraction has 1449 states and 1815 transitions. [2023-02-17 09:25:34,123 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 2.9047619047619047) internal successors, (61), 16 states have internal predecessors, (61), 5 states have call successors, (7), 5 states have call predecessors, (7), 5 states have return successors, (5), 4 states have call predecessors, (5), 1 states have call successors, (5) [2023-02-17 09:25:34,123 INFO L276 IsEmpty]: Start isEmpty. Operand 1449 states and 1815 transitions. [2023-02-17 09:25:34,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2023-02-17 09:25:34,124 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 09:25:34,125 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 09:25:34,136 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 09:25:34,329 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-02-17 09:25:34,330 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ackermannErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2023-02-17 09:25:34,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 09:25:34,330 INFO L85 PathProgramCache]: Analyzing trace with hash 407823314, now seen corresponding path program 1 times [2023-02-17 09:25:34,330 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 09:25:34,330 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1352493184] [2023-02-17 09:25:34,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 09:25:34,330 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 09:25:34,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 09:25:34,377 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2023-02-17 09:25:34,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 09:25:34,387 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 38 proven. 5 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-02-17 09:25:34,387 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 09:25:34,387 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1352493184] [2023-02-17 09:25:34,387 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1352493184] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 09:25:34,387 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1447995408] [2023-02-17 09:25:34,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 09:25:34,387 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 09:25:34,387 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 09:25:34,388 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 09:25:34,389 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 09:25:34,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 09:25:34,425 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 9 conjunts are in the unsatisfiable core [2023-02-17 09:25:34,426 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 09:25:34,464 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 52 proven. 3 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-02-17 09:25:34,465 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 09:25:34,511 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 53 proven. 2 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-02-17 09:25:34,511 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1447995408] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 09:25:34,511 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 09:25:34,511 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 16 [2023-02-17 09:25:34,512 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1094234465] [2023-02-17 09:25:34,512 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 09:25:34,524 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-02-17 09:25:34,524 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 09:25:34,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-02-17 09:25:34,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2023-02-17 09:25:34,524 INFO L87 Difference]: Start difference. First operand 1449 states and 1815 transitions. Second operand has 16 states, 16 states have (on average 3.375) internal successors, (54), 13 states have internal predecessors, (54), 6 states have call successors, (9), 5 states have call predecessors, (9), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-02-17 09:25:34,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 09:25:34,855 INFO L93 Difference]: Finished difference Result 1875 states and 2461 transitions. [2023-02-17 09:25:34,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-02-17 09:25:34,856 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.375) internal successors, (54), 13 states have internal predecessors, (54), 6 states have call successors, (9), 5 states have call predecessors, (9), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 51 [2023-02-17 09:25:34,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 09:25:34,863 INFO L225 Difference]: With dead ends: 1875 [2023-02-17 09:25:34,863 INFO L226 Difference]: Without dead ends: 1807 [2023-02-17 09:25:34,864 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 89 SyntacticMatches, 7 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 246 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=334, Invalid=926, Unknown=0, NotChecked=0, Total=1260 [2023-02-17 09:25:34,865 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 204 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 427 mSolverCounterSat, 159 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 204 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 586 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 159 IncrementalHoareTripleChecker+Valid, 427 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-17 09:25:34,865 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [204 Valid, 71 Invalid, 586 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [159 Valid, 427 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-17 09:25:34,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1807 states. [2023-02-17 09:25:34,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1807 to 1391. [2023-02-17 09:25:34,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1391 states, 1050 states have (on average 1.140952380952381) internal successors, (1198), 1093 states have internal predecessors, (1198), 216 states have call successors, (216), 79 states have call predecessors, (216), 121 states have return successors, (328), 218 states have call predecessors, (328), 181 states have call successors, (328) [2023-02-17 09:25:34,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1391 states to 1391 states and 1742 transitions. [2023-02-17 09:25:34,929 INFO L78 Accepts]: Start accepts. Automaton has 1391 states and 1742 transitions. Word has length 51 [2023-02-17 09:25:34,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 09:25:34,930 INFO L495 AbstractCegarLoop]: Abstraction has 1391 states and 1742 transitions. [2023-02-17 09:25:34,930 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.375) internal successors, (54), 13 states have internal predecessors, (54), 6 states have call successors, (9), 5 states have call predecessors, (9), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-02-17 09:25:34,930 INFO L276 IsEmpty]: Start isEmpty. Operand 1391 states and 1742 transitions. [2023-02-17 09:25:34,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2023-02-17 09:25:34,931 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 09:25:34,931 INFO L195 NwaCegarLoop]: trace histogram [6, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 09:25:34,936 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 09:25:35,136 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-02-17 09:25:35,136 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2023-02-17 09:25:35,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 09:25:35,136 INFO L85 PathProgramCache]: Analyzing trace with hash 843839239, now seen corresponding path program 1 times [2023-02-17 09:25:35,136 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 09:25:35,137 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1682252234] [2023-02-17 09:25:35,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 09:25:35,137 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 09:25:35,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 09:25:35,208 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-02-17 09:25:35,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 09:25:35,243 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-02-17 09:25:35,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 09:25:35,258 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-02-17 09:25:35,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 09:25:35,273 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2023-02-17 09:25:35,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 09:25:35,291 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 21 proven. 16 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-02-17 09:25:35,291 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 09:25:35,291 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1682252234] [2023-02-17 09:25:35,291 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1682252234] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 09:25:35,291 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [854639729] [2023-02-17 09:25:35,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 09:25:35,291 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 09:25:35,292 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 09:25:35,293 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 09:25:35,295 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 09:25:35,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 09:25:35,330 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 15 conjunts are in the unsatisfiable core [2023-02-17 09:25:35,332 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 09:25:35,367 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 14 proven. 18 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2023-02-17 09:25:35,367 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 09:25:35,522 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 18 proven. 19 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-02-17 09:25:35,523 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [854639729] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 09:25:35,523 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 09:25:35,523 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 13] total 26 [2023-02-17 09:25:35,523 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [637187988] [2023-02-17 09:25:35,523 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 09:25:35,523 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-02-17 09:25:35,523 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 09:25:35,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-02-17 09:25:35,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=614, Unknown=0, NotChecked=0, Total=702 [2023-02-17 09:25:35,524 INFO L87 Difference]: Start difference. First operand 1391 states and 1742 transitions. Second operand has 27 states, 26 states have (on average 2.230769230769231) internal successors, (58), 21 states have internal predecessors, (58), 5 states have call successors, (7), 3 states have call predecessors, (7), 8 states have return successors, (9), 8 states have call predecessors, (9), 3 states have call successors, (9) [2023-02-17 09:25:36,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 09:25:36,359 INFO L93 Difference]: Finished difference Result 3378 states and 5999 transitions. [2023-02-17 09:25:36,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2023-02-17 09:25:36,359 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 2.230769230769231) internal successors, (58), 21 states have internal predecessors, (58), 5 states have call successors, (7), 3 states have call predecessors, (7), 8 states have return successors, (9), 8 states have call predecessors, (9), 3 states have call successors, (9) Word has length 53 [2023-02-17 09:25:36,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 09:25:36,378 INFO L225 Difference]: With dead ends: 3378 [2023-02-17 09:25:36,378 INFO L226 Difference]: Without dead ends: 3376 [2023-02-17 09:25:36,382 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 95 SyntacticMatches, 6 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1696 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1154, Invalid=5008, Unknown=0, NotChecked=0, Total=6162 [2023-02-17 09:25:36,382 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 178 mSDsluCounter, 227 mSDsCounter, 0 mSdLazyCounter, 788 mSolverCounterSat, 427 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 191 SdHoareTripleChecker+Valid, 252 SdHoareTripleChecker+Invalid, 1215 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 427 IncrementalHoareTripleChecker+Valid, 788 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-02-17 09:25:36,383 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [191 Valid, 252 Invalid, 1215 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [427 Valid, 788 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-02-17 09:25:36,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3376 states. [2023-02-17 09:25:36,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3376 to 2468. [2023-02-17 09:25:36,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2468 states, 1732 states have (on average 1.1096997690531178) internal successors, (1922), 1778 states have internal predecessors, (1922), 433 states have call successors, (433), 93 states have call predecessors, (433), 299 states have return successors, (2469), 596 states have call predecessors, (2469), 396 states have call successors, (2469) [2023-02-17 09:25:36,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2468 states to 2468 states and 4824 transitions. [2023-02-17 09:25:36,558 INFO L78 Accepts]: Start accepts. Automaton has 2468 states and 4824 transitions. Word has length 53 [2023-02-17 09:25:36,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 09:25:36,558 INFO L495 AbstractCegarLoop]: Abstraction has 2468 states and 4824 transitions. [2023-02-17 09:25:36,559 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 2.230769230769231) internal successors, (58), 21 states have internal predecessors, (58), 5 states have call successors, (7), 3 states have call predecessors, (7), 8 states have return successors, (9), 8 states have call predecessors, (9), 3 states have call successors, (9) [2023-02-17 09:25:36,559 INFO L276 IsEmpty]: Start isEmpty. Operand 2468 states and 4824 transitions. [2023-02-17 09:25:36,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2023-02-17 09:25:36,561 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 09:25:36,561 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1] [2023-02-17 09:25:36,567 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 09:25:36,765 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-02-17 09:25:36,765 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ackermannErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2023-02-17 09:25:36,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 09:25:36,766 INFO L85 PathProgramCache]: Analyzing trace with hash 2013961680, now seen corresponding path program 1 times [2023-02-17 09:25:36,766 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 09:25:36,766 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2122720951] [2023-02-17 09:25:36,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 09:25:36,766 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 09:25:36,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 09:25:36,860 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 111 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-02-17 09:25:36,860 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 09:25:36,861 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2122720951] [2023-02-17 09:25:36,861 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2122720951] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 09:25:36,861 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [863483044] [2023-02-17 09:25:36,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 09:25:36,861 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 09:25:36,861 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 09:25:36,862 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 09:25:36,864 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 09:25:36,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 09:25:36,903 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 18 conjunts are in the unsatisfiable core [2023-02-17 09:25:36,905 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 09:25:36,966 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 111 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-02-17 09:25:36,967 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 09:25:37,078 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 111 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-02-17 09:25:37,078 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [863483044] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 09:25:37,078 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 09:25:37,078 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 23 [2023-02-17 09:25:37,079 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1455837351] [2023-02-17 09:25:37,079 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 09:25:37,079 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-02-17 09:25:37,079 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 09:25:37,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-02-17 09:25:37,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=416, Unknown=0, NotChecked=0, Total=552 [2023-02-17 09:25:37,080 INFO L87 Difference]: Start difference. First operand 2468 states and 4824 transitions. Second operand has 24 states, 23 states have (on average 3.652173913043478) internal successors, (84), 14 states have internal predecessors, (84), 10 states have call successors, (16), 10 states have call predecessors, (16), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 09:25:37,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 09:25:37,831 INFO L93 Difference]: Finished difference Result 7290 states and 13932 transitions. [2023-02-17 09:25:37,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2023-02-17 09:25:37,832 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 3.652173913043478) internal successors, (84), 14 states have internal predecessors, (84), 10 states have call successors, (16), 10 states have call predecessors, (16), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2023-02-17 09:25:37,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 09:25:37,882 INFO L225 Difference]: With dead ends: 7290 [2023-02-17 09:25:37,882 INFO L226 Difference]: Without dead ends: 7289 [2023-02-17 09:25:37,888 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 91 SyntacticMatches, 17 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 439 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=554, Invalid=1252, Unknown=0, NotChecked=0, Total=1806 [2023-02-17 09:25:37,889 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 721 mSDsluCounter, 275 mSDsCounter, 0 mSdLazyCounter, 370 mSolverCounterSat, 330 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 727 SdHoareTripleChecker+Valid, 304 SdHoareTripleChecker+Invalid, 700 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 330 IncrementalHoareTripleChecker+Valid, 370 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-17 09:25:37,889 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [727 Valid, 304 Invalid, 700 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [330 Valid, 370 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-17 09:25:37,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7289 states. [2023-02-17 09:25:38,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7289 to 6716. [2023-02-17 09:25:38,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6716 states, 4744 states have (on average 1.110876897133221) internal successors, (5270), 4850 states have internal predecessors, (5270), 1177 states have call successors, (1177), 273 states have call predecessors, (1177), 791 states have return successors, (6567), 1592 states have call predecessors, (6567), 1050 states have call successors, (6567) [2023-02-17 09:25:38,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6716 states to 6716 states and 13014 transitions. [2023-02-17 09:25:38,395 INFO L78 Accepts]: Start accepts. Automaton has 6716 states and 13014 transitions. Word has length 57 [2023-02-17 09:25:38,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 09:25:38,396 INFO L495 AbstractCegarLoop]: Abstraction has 6716 states and 13014 transitions. [2023-02-17 09:25:38,396 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 3.652173913043478) internal successors, (84), 14 states have internal predecessors, (84), 10 states have call successors, (16), 10 states have call predecessors, (16), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 09:25:38,396 INFO L276 IsEmpty]: Start isEmpty. Operand 6716 states and 13014 transitions. [2023-02-17 09:25:38,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2023-02-17 09:25:38,398 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 09:25:38,398 INFO L195 NwaCegarLoop]: trace histogram [6, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 09:25:38,405 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 09:25:38,603 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-02-17 09:25:38,603 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ackermannErr6ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2023-02-17 09:25:38,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 09:25:38,604 INFO L85 PathProgramCache]: Analyzing trace with hash -814290418, now seen corresponding path program 1 times [2023-02-17 09:25:38,604 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 09:25:38,604 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [150006270] [2023-02-17 09:25:38,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 09:25:38,604 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 09:25:38,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 09:25:38,651 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-02-17 09:25:38,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 09:25:38,683 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-02-17 09:25:38,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 09:25:38,702 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-02-17 09:25:38,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 09:25:38,717 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2023-02-17 09:25:38,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 09:25:38,738 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 36 proven. 6 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-02-17 09:25:38,738 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 09:25:38,738 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [150006270] [2023-02-17 09:25:38,738 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [150006270] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 09:25:38,738 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [752135334] [2023-02-17 09:25:38,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 09:25:38,738 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 09:25:38,738 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 09:25:38,739 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 09:25:38,741 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 09:25:38,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 09:25:38,778 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 15 conjunts are in the unsatisfiable core [2023-02-17 09:25:38,778 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 09:25:38,850 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 27 proven. 10 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2023-02-17 09:25:38,850 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 09:25:38,988 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 40 proven. 2 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-02-17 09:25:38,988 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [752135334] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 09:25:38,988 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 09:25:38,989 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 13] total 26 [2023-02-17 09:25:38,989 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [156066196] [2023-02-17 09:25:38,989 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 09:25:38,989 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-02-17 09:25:38,989 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 09:25:38,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-02-17 09:25:38,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=608, Unknown=0, NotChecked=0, Total=702 [2023-02-17 09:25:38,990 INFO L87 Difference]: Start difference. First operand 6716 states and 13014 transitions. Second operand has 27 states, 26 states have (on average 2.3846153846153846) internal successors, (62), 21 states have internal predecessors, (62), 5 states have call successors, (7), 3 states have call predecessors, (7), 8 states have return successors, (9), 8 states have call predecessors, (9), 3 states have call successors, (9) [2023-02-17 09:25:40,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 09:25:40,515 INFO L93 Difference]: Finished difference Result 24355 states and 82409 transitions. [2023-02-17 09:25:40,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2023-02-17 09:25:40,516 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 2.3846153846153846) internal successors, (62), 21 states have internal predecessors, (62), 5 states have call successors, (7), 3 states have call predecessors, (7), 8 states have return successors, (9), 8 states have call predecessors, (9), 3 states have call successors, (9) Word has length 55 [2023-02-17 09:25:40,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 09:25:40,779 INFO L225 Difference]: With dead ends: 24355 [2023-02-17 09:25:40,779 INFO L226 Difference]: Without dead ends: 18094 [2023-02-17 09:25:40,865 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 95 SyntacticMatches, 10 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 822 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=905, Invalid=3517, Unknown=0, NotChecked=0, Total=4422 [2023-02-17 09:25:40,865 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 132 mSDsluCounter, 278 mSDsCounter, 0 mSdLazyCounter, 747 mSolverCounterSat, 238 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 314 SdHoareTripleChecker+Invalid, 985 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 238 IncrementalHoareTripleChecker+Valid, 747 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-02-17 09:25:40,866 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [132 Valid, 314 Invalid, 985 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [238 Valid, 747 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-02-17 09:25:40,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18094 states. [2023-02-17 09:25:42,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18094 to 14204. [2023-02-17 09:25:42,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14204 states, 9444 states have (on average 1.0726387124099959) internal successors, (10130), 9522 states have internal predecessors, (10130), 2706 states have call successors, (2706), 364 states have call predecessors, (2706), 2050 states have return successors, (36260), 4317 states have call predecessors, (36260), 2553 states have call successors, (36260) [2023-02-17 09:25:42,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14204 states to 14204 states and 49096 transitions. [2023-02-17 09:25:42,396 INFO L78 Accepts]: Start accepts. Automaton has 14204 states and 49096 transitions. Word has length 55 [2023-02-17 09:25:42,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 09:25:42,397 INFO L495 AbstractCegarLoop]: Abstraction has 14204 states and 49096 transitions. [2023-02-17 09:25:42,397 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 2.3846153846153846) internal successors, (62), 21 states have internal predecessors, (62), 5 states have call successors, (7), 3 states have call predecessors, (7), 8 states have return successors, (9), 8 states have call predecessors, (9), 3 states have call successors, (9) [2023-02-17 09:25:42,397 INFO L276 IsEmpty]: Start isEmpty. Operand 14204 states and 49096 transitions. [2023-02-17 09:25:42,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2023-02-17 09:25:42,399 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 09:25:42,399 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1] [2023-02-17 09:25:42,417 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2023-02-17 09:25:42,603 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 09:25:42,603 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ackermannErr6ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2023-02-17 09:25:42,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 09:25:42,603 INFO L85 PathProgramCache]: Analyzing trace with hash 1321083776, now seen corresponding path program 2 times [2023-02-17 09:25:42,604 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 09:25:42,604 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1967118082] [2023-02-17 09:25:42,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 09:25:42,604 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 09:25:42,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 09:25:42,705 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 09:25:42,705 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 09:25:42,705 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1967118082] [2023-02-17 09:25:42,705 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1967118082] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 09:25:42,705 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [306747676] [2023-02-17 09:25:42,706 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-17 09:25:42,706 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 09:25:42,706 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 09:25:42,707 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 09:25:42,740 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 09:25:42,755 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-17 09:25:42,755 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-17 09:25:42,756 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 16 conjunts are in the unsatisfiable core [2023-02-17 09:25:42,756 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 09:25:42,827 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 09:25:42,827 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 09:25:42,980 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 09:25:42,980 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [306747676] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 09:25:42,980 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 09:25:42,980 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 31 [2023-02-17 09:25:42,980 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [330004742] [2023-02-17 09:25:42,980 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 09:25:42,980 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-02-17 09:25:42,981 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 09:25:42,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-02-17 09:25:42,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=244, Invalid=748, Unknown=0, NotChecked=0, Total=992 [2023-02-17 09:25:42,981 INFO L87 Difference]: Start difference. First operand 14204 states and 49096 transitions. Second operand has 32 states, 29 states have (on average 3.4827586206896552) internal successors, (101), 18 states have internal predecessors, (101), 14 states have call successors, (14), 14 states have call predecessors, (14), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 09:25:44,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 09:25:44,608 INFO L93 Difference]: Finished difference Result 22005 states and 73240 transitions. [2023-02-17 09:25:44,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2023-02-17 09:25:44,609 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 29 states have (on average 3.4827586206896552) internal successors, (101), 18 states have internal predecessors, (101), 14 states have call successors, (14), 14 states have call predecessors, (14), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2023-02-17 09:25:44,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 09:25:44,802 INFO L225 Difference]: With dead ends: 22005 [2023-02-17 09:25:44,802 INFO L226 Difference]: Without dead ends: 22004 [2023-02-17 09:25:44,819 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 90 SyntacticMatches, 12 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 795 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=1054, Invalid=2368, Unknown=0, NotChecked=0, Total=3422 [2023-02-17 09:25:44,819 INFO L413 NwaCegarLoop]: 53 mSDtfsCounter, 713 mSDsluCounter, 477 mSDsCounter, 0 mSdLazyCounter, 718 mSolverCounterSat, 219 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 716 SdHoareTripleChecker+Valid, 530 SdHoareTripleChecker+Invalid, 937 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 219 IncrementalHoareTripleChecker+Valid, 718 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-17 09:25:44,820 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [716 Valid, 530 Invalid, 937 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [219 Valid, 718 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-17 09:25:44,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22004 states. [2023-02-17 09:25:46,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22004 to 20834. [2023-02-17 09:25:46,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20834 states, 13831 states have (on average 1.0657942303521075) internal successors, (14741), 14008 states have internal predecessors, (14741), 3890 states have call successors, (3890), 508 states have call predecessors, (3890), 3109 states have return successors, (51912), 6317 states have call predecessors, (51912), 3673 states have call successors, (51912) [2023-02-17 09:25:46,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20834 states to 20834 states and 70543 transitions. [2023-02-17 09:25:46,566 INFO L78 Accepts]: Start accepts. Automaton has 20834 states and 70543 transitions. Word has length 59 [2023-02-17 09:25:46,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 09:25:46,567 INFO L495 AbstractCegarLoop]: Abstraction has 20834 states and 70543 transitions. [2023-02-17 09:25:46,567 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 29 states have (on average 3.4827586206896552) internal successors, (101), 18 states have internal predecessors, (101), 14 states have call successors, (14), 14 states have call predecessors, (14), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 09:25:46,567 INFO L276 IsEmpty]: Start isEmpty. Operand 20834 states and 70543 transitions. [2023-02-17 09:25:46,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2023-02-17 09:25:46,569 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 09:25:46,569 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 09:25:46,575 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-02-17 09:25:46,773 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 09:25:46,773 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ackermannErr6ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2023-02-17 09:25:46,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 09:25:46,773 INFO L85 PathProgramCache]: Analyzing trace with hash -1343121217, now seen corresponding path program 3 times [2023-02-17 09:25:46,774 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 09:25:46,774 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1515947436] [2023-02-17 09:25:46,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 09:25:46,774 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 09:25:46,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 09:25:46,863 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2023-02-17 09:25:46,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 09:25:46,882 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 3 proven. 111 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-02-17 09:25:46,882 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 09:25:46,882 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1515947436] [2023-02-17 09:25:46,882 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1515947436] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 09:25:46,882 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1404322722] [2023-02-17 09:25:46,882 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-17 09:25:46,883 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 09:25:46,883 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 09:25:46,884 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 09:25:46,886 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 09:25:46,926 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2023-02-17 09:25:46,927 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-17 09:25:46,927 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 7 conjunts are in the unsatisfiable core [2023-02-17 09:25:46,928 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 09:25:46,948 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 87 proven. 0 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2023-02-17 09:25:46,948 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-17 09:25:46,948 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1404322722] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 09:25:46,948 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-02-17 09:25:46,948 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [15] total 19 [2023-02-17 09:25:46,948 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1489468494] [2023-02-17 09:25:46,949 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 09:25:46,949 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-17 09:25:46,949 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 09:25:46,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-17 09:25:46,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2023-02-17 09:25:46,950 INFO L87 Difference]: Start difference. First operand 20834 states and 70543 transitions. Second operand has 5 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-17 09:25:47,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 09:25:47,808 INFO L93 Difference]: Finished difference Result 20917 states and 71959 transitions. [2023-02-17 09:25:47,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-02-17 09:25:47,808 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 59 [2023-02-17 09:25:47,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 09:25:47,989 INFO L225 Difference]: With dead ends: 20917 [2023-02-17 09:25:47,989 INFO L226 Difference]: Without dead ends: 18654 [2023-02-17 09:25:48,014 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=357, Unknown=0, NotChecked=0, Total=420 [2023-02-17 09:25:48,015 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 32 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-17 09:25:48,015 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 50 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-17 09:25:48,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18654 states. [2023-02-17 09:25:49,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18654 to 18540. [2023-02-17 09:25:49,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18540 states, 11955 states have (on average 1.043245503973233) internal successors, (12472), 11949 states have internal predecessors, (12472), 3684 states have call successors, (3684), 332 states have call predecessors, (3684), 2897 states have return successors, (51628), 6258 states have call predecessors, (51628), 3673 states have call successors, (51628) [2023-02-17 09:25:49,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18540 states to 18540 states and 67784 transitions. [2023-02-17 09:25:49,860 INFO L78 Accepts]: Start accepts. Automaton has 18540 states and 67784 transitions. Word has length 59 [2023-02-17 09:25:49,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 09:25:49,861 INFO L495 AbstractCegarLoop]: Abstraction has 18540 states and 67784 transitions. [2023-02-17 09:25:49,861 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-17 09:25:49,861 INFO L276 IsEmpty]: Start isEmpty. Operand 18540 states and 67784 transitions. [2023-02-17 09:25:49,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2023-02-17 09:25:49,862 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 09:25:49,863 INFO L195 NwaCegarLoop]: trace histogram [8, 6, 5, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 09:25:49,868 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 09:25:50,066 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 09:25:50,066 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ackermannErr6ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2023-02-17 09:25:50,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 09:25:50,067 INFO L85 PathProgramCache]: Analyzing trace with hash -1106576793, now seen corresponding path program 2 times [2023-02-17 09:25:50,067 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 09:25:50,067 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2028199680] [2023-02-17 09:25:50,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 09:25:50,067 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 09:25:50,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 09:25:50,144 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-02-17 09:25:50,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 09:25:50,177 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-02-17 09:25:50,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 09:25:50,214 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-02-17 09:25:50,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 09:25:50,233 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-02-17 09:25:50,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 09:25:50,251 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2023-02-17 09:25:50,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 09:25:50,275 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 70 proven. 16 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2023-02-17 09:25:50,276 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 09:25:50,276 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2028199680] [2023-02-17 09:25:50,276 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2028199680] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 09:25:50,276 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [108963616] [2023-02-17 09:25:50,276 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-17 09:25:50,276 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 09:25:50,277 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 09:25:50,278 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 09:25:50,309 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 09:25:50,338 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-17 09:25:50,339 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-17 09:25:50,339 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 19 conjunts are in the unsatisfiable core [2023-02-17 09:25:50,340 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 09:25:50,405 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 59 proven. 22 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2023-02-17 09:25:50,405 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 09:25:50,749 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 78 proven. 8 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2023-02-17 09:25:50,749 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [108963616] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 09:25:50,749 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 09:25:50,749 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 16] total 32 [2023-02-17 09:25:50,750 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2032728896] [2023-02-17 09:25:50,750 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 09:25:50,750 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-02-17 09:25:50,750 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 09:25:50,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-02-17 09:25:50,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=930, Unknown=0, NotChecked=0, Total=1056 [2023-02-17 09:25:50,751 INFO L87 Difference]: Start difference. First operand 18540 states and 67784 transitions. Second operand has 33 states, 32 states have (on average 2.4375) internal successors, (78), 23 states have internal predecessors, (78), 7 states have call successors, (9), 5 states have call predecessors, (9), 8 states have return successors, (11), 10 states have call predecessors, (11), 3 states have call successors, (11) [2023-02-17 09:25:52,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 09:25:52,068 INFO L93 Difference]: Finished difference Result 28970 states and 107394 transitions. [2023-02-17 09:25:52,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-02-17 09:25:52,068 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 32 states have (on average 2.4375) internal successors, (78), 23 states have internal predecessors, (78), 7 states have call successors, (9), 5 states have call predecessors, (9), 8 states have return successors, (11), 10 states have call predecessors, (11), 3 states have call successors, (11) Word has length 72 [2023-02-17 09:25:52,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 09:25:52,123 INFO L225 Difference]: With dead ends: 28970 [2023-02-17 09:25:52,123 INFO L226 Difference]: Without dead ends: 10960 [2023-02-17 09:25:52,507 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 126 SyntacticMatches, 14 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 557 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=667, Invalid=2639, Unknown=0, NotChecked=0, Total=3306 [2023-02-17 09:25:52,508 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 231 mSDsluCounter, 302 mSDsCounter, 0 mSdLazyCounter, 697 mSolverCounterSat, 200 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 231 SdHoareTripleChecker+Valid, 340 SdHoareTripleChecker+Invalid, 897 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 200 IncrementalHoareTripleChecker+Valid, 697 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-17 09:25:52,508 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [231 Valid, 340 Invalid, 897 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [200 Valid, 697 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-17 09:25:52,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10960 states. [2023-02-17 09:25:53,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10960 to 10392. [2023-02-17 09:25:53,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10392 states, 7038 states have (on average 1.066780335322535) internal successors, (7508), 7204 states have internal predecessors, (7508), 2051 states have call successors, (2051), 356 states have call predecessors, (2051), 1299 states have return successors, (6727), 2831 states have call predecessors, (6727), 2043 states have call successors, (6727) [2023-02-17 09:25:53,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10392 states to 10392 states and 16286 transitions. [2023-02-17 09:25:53,120 INFO L78 Accepts]: Start accepts. Automaton has 10392 states and 16286 transitions. Word has length 72 [2023-02-17 09:25:53,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 09:25:53,120 INFO L495 AbstractCegarLoop]: Abstraction has 10392 states and 16286 transitions. [2023-02-17 09:25:53,120 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 32 states have (on average 2.4375) internal successors, (78), 23 states have internal predecessors, (78), 7 states have call successors, (9), 5 states have call predecessors, (9), 8 states have return successors, (11), 10 states have call predecessors, (11), 3 states have call successors, (11) [2023-02-17 09:25:53,120 INFO L276 IsEmpty]: Start isEmpty. Operand 10392 states and 16286 transitions. [2023-02-17 09:25:53,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2023-02-17 09:25:53,122 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 09:25:53,122 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 6, 6, 6, 5, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 09:25:53,128 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 09:25:53,326 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 09:25:53,327 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ackermannErr6ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2023-02-17 09:25:53,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 09:25:53,327 INFO L85 PathProgramCache]: Analyzing trace with hash 1935422832, now seen corresponding path program 3 times [2023-02-17 09:25:53,327 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 09:25:53,327 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1749662527] [2023-02-17 09:25:53,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 09:25:53,327 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 09:25:53,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 09:25:53,407 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-02-17 09:25:53,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 09:25:53,425 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-02-17 09:25:53,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 09:25:53,444 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 62 proven. 77 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-02-17 09:25:53,445 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 09:25:53,445 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1749662527] [2023-02-17 09:25:53,445 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1749662527] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 09:25:53,445 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [629942508] [2023-02-17 09:25:53,445 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-17 09:25:53,445 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 09:25:53,445 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 09:25:53,446 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 09:25:53,449 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 09:25:53,499 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2023-02-17 09:25:53,499 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-17 09:25:53,500 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 17 conjunts are in the unsatisfiable core [2023-02-17 09:25:53,501 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 09:25:53,565 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 60 proven. 79 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-02-17 09:25:53,565 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 09:25:53,737 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 64 proven. 75 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-02-17 09:25:53,737 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [629942508] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 09:25:53,737 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 09:25:53,738 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 33 [2023-02-17 09:25:53,738 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2042140323] [2023-02-17 09:25:53,738 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 09:25:53,738 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-02-17 09:25:53,738 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 09:25:53,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-02-17 09:25:53,739 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=949, Unknown=0, NotChecked=0, Total=1122 [2023-02-17 09:25:53,739 INFO L87 Difference]: Start difference. First operand 10392 states and 16286 transitions. Second operand has 34 states, 33 states have (on average 3.121212121212121) internal successors, (103), 22 states have internal predecessors, (103), 11 states have call successors, (13), 11 states have call predecessors, (13), 5 states have return successors, (5), 4 states have call predecessors, (5), 1 states have call successors, (5) [2023-02-17 09:25:54,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 09:25:54,499 INFO L93 Difference]: Finished difference Result 11147 states and 17428 transitions. [2023-02-17 09:25:54,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-02-17 09:25:54,500 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 3.121212121212121) internal successors, (103), 22 states have internal predecessors, (103), 11 states have call successors, (13), 11 states have call predecessors, (13), 5 states have return successors, (5), 4 states have call predecessors, (5), 1 states have call successors, (5) Word has length 68 [2023-02-17 09:25:54,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 09:25:54,530 INFO L225 Difference]: With dead ends: 11147 [2023-02-17 09:25:54,530 INFO L226 Difference]: Without dead ends: 11146 [2023-02-17 09:25:54,535 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 115 SyntacticMatches, 12 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 534 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=573, Invalid=1977, Unknown=0, NotChecked=0, Total=2550 [2023-02-17 09:25:54,535 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 247 mSDsluCounter, 205 mSDsCounter, 0 mSdLazyCounter, 446 mSolverCounterSat, 206 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 247 SdHoareTripleChecker+Valid, 236 SdHoareTripleChecker+Invalid, 652 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 206 IncrementalHoareTripleChecker+Valid, 446 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-17 09:25:54,536 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [247 Valid, 236 Invalid, 652 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [206 Valid, 446 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-17 09:25:54,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11146 states. [2023-02-17 09:25:55,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11146 to 10500. [2023-02-17 09:25:55,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10500 states, 7110 states have (on average 1.0635724331926864) internal successors, (7562), 7276 states have internal predecessors, (7562), 2051 states have call successors, (2051), 356 states have call predecessors, (2051), 1335 states have return successors, (6821), 2867 states have call predecessors, (6821), 2043 states have call successors, (6821) [2023-02-17 09:25:55,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10500 states to 10500 states and 16434 transitions. [2023-02-17 09:25:55,049 INFO L78 Accepts]: Start accepts. Automaton has 10500 states and 16434 transitions. Word has length 68 [2023-02-17 09:25:55,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 09:25:55,049 INFO L495 AbstractCegarLoop]: Abstraction has 10500 states and 16434 transitions. [2023-02-17 09:25:55,049 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 33 states have (on average 3.121212121212121) internal successors, (103), 22 states have internal predecessors, (103), 11 states have call successors, (13), 11 states have call predecessors, (13), 5 states have return successors, (5), 4 states have call predecessors, (5), 1 states have call successors, (5) [2023-02-17 09:25:55,049 INFO L276 IsEmpty]: Start isEmpty. Operand 10500 states and 16434 transitions. [2023-02-17 09:25:55,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2023-02-17 09:25:55,052 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 09:25:55,052 INFO L195 NwaCegarLoop]: trace histogram [12, 8, 7, 6, 6, 6, 6, 6, 6, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2023-02-17 09:25:55,074 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-02-17 09:25:55,256 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 09:25:55,257 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2023-02-17 09:25:55,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 09:25:55,257 INFO L85 PathProgramCache]: Analyzing trace with hash -1205417592, now seen corresponding path program 2 times [2023-02-17 09:25:55,257 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 09:25:55,257 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1922298120] [2023-02-17 09:25:55,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 09:25:55,257 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 09:25:55,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 09:25:55,305 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2023-02-17 09:25:55,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 09:25:55,324 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-02-17 09:25:55,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 09:25:55,353 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-02-17 09:25:55,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 09:25:55,380 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-02-17 09:25:55,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 09:25:55,391 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-02-17 09:25:55,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 09:25:55,393 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2023-02-17 09:25:55,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 09:25:55,395 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2023-02-17 09:25:55,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 09:25:55,397 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 139 proven. 24 refuted. 0 times theorem prover too weak. 137 trivial. 0 not checked. [2023-02-17 09:25:55,398 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 09:25:55,398 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1922298120] [2023-02-17 09:25:55,398 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1922298120] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 09:25:55,398 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [223423815] [2023-02-17 09:25:55,398 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-17 09:25:55,398 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 09:25:55,398 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 09:25:55,399 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 09:25:55,420 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 09:25:55,465 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-17 09:25:55,465 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-17 09:25:55,466 INFO L263 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 7 conjunts are in the unsatisfiable core [2023-02-17 09:25:55,468 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 09:25:55,488 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 139 proven. 15 refuted. 0 times theorem prover too weak. 146 trivial. 0 not checked. [2023-02-17 09:25:55,489 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 09:25:55,554 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 139 proven. 26 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2023-02-17 09:25:55,554 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [223423815] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 09:25:55,555 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 09:25:55,555 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 8] total 13 [2023-02-17 09:25:55,555 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1583608009] [2023-02-17 09:25:55,555 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 09:25:55,555 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-02-17 09:25:55,555 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 09:25:55,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-02-17 09:25:55,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2023-02-17 09:25:55,556 INFO L87 Difference]: Start difference. First operand 10500 states and 16434 transitions. Second operand has 13 states, 13 states have (on average 6.3076923076923075) internal successors, (82), 13 states have internal predecessors, (82), 12 states have call successors, (14), 2 states have call predecessors, (14), 7 states have return successors, (14), 6 states have call predecessors, (14), 11 states have call successors, (14) [2023-02-17 09:25:56,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 09:25:56,060 INFO L93 Difference]: Finished difference Result 21289 states and 37508 transitions. [2023-02-17 09:25:56,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-02-17 09:25:56,060 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 6.3076923076923075) internal successors, (82), 13 states have internal predecessors, (82), 12 states have call successors, (14), 2 states have call predecessors, (14), 7 states have return successors, (14), 6 states have call predecessors, (14), 11 states have call successors, (14) Word has length 105 [2023-02-17 09:25:56,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 09:25:56,100 INFO L225 Difference]: With dead ends: 21289 [2023-02-17 09:25:56,100 INFO L226 Difference]: Without dead ends: 11684 [2023-02-17 09:25:56,139 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 236 GetRequests, 212 SyntacticMatches, 8 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=102, Invalid=204, Unknown=0, NotChecked=0, Total=306 [2023-02-17 09:25:56,139 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 44 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 137 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-17 09:25:56,139 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 97 Invalid, 137 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 116 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-17 09:25:56,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11684 states. [2023-02-17 09:25:56,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11684 to 10494. [2023-02-17 09:25:56,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10494 states, 7107 states have (on average 1.0635992683270015) internal successors, (7559), 7273 states have internal predecessors, (7559), 2048 states have call successors, (2048), 356 states have call predecessors, (2048), 1335 states have return successors, (6741), 2864 states have call predecessors, (6741), 2013 states have call successors, (6741) [2023-02-17 09:25:56,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10494 states to 10494 states and 16348 transitions. [2023-02-17 09:25:56,702 INFO L78 Accepts]: Start accepts. Automaton has 10494 states and 16348 transitions. Word has length 105 [2023-02-17 09:25:56,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 09:25:56,702 INFO L495 AbstractCegarLoop]: Abstraction has 10494 states and 16348 transitions. [2023-02-17 09:25:56,703 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 6.3076923076923075) internal successors, (82), 13 states have internal predecessors, (82), 12 states have call successors, (14), 2 states have call predecessors, (14), 7 states have return successors, (14), 6 states have call predecessors, (14), 11 states have call successors, (14) [2023-02-17 09:25:56,703 INFO L276 IsEmpty]: Start isEmpty. Operand 10494 states and 16348 transitions. [2023-02-17 09:25:56,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2023-02-17 09:25:56,706 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 09:25:56,706 INFO L195 NwaCegarLoop]: trace histogram [11, 9, 6, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2023-02-17 09:25:56,713 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2023-02-17 09:25:56,909 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 09:25:56,909 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2023-02-17 09:25:56,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 09:25:56,910 INFO L85 PathProgramCache]: Analyzing trace with hash -1307053986, now seen corresponding path program 3 times [2023-02-17 09:25:56,910 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 09:25:56,910 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [738708845] [2023-02-17 09:25:56,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 09:25:56,910 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 09:25:56,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 09:25:56,954 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-02-17 09:25:56,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 09:25:56,994 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-02-17 09:25:57,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 09:25:57,025 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-02-17 09:25:57,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 09:25:57,052 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-02-17 09:25:57,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 09:25:57,102 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-02-17 09:25:57,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 09:25:57,120 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-02-17 09:25:57,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 09:25:57,130 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2023-02-17 09:25:57,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 09:25:57,133 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2023-02-17 09:25:57,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 09:25:57,140 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2023-02-17 09:25:57,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 09:25:57,142 INFO L134 CoverageAnalysis]: Checked inductivity of 266 backedges. 117 proven. 45 refuted. 0 times theorem prover too weak. 104 trivial. 0 not checked. [2023-02-17 09:25:57,142 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 09:25:57,142 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [738708845] [2023-02-17 09:25:57,142 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [738708845] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 09:25:57,143 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [885135514] [2023-02-17 09:25:57,143 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-17 09:25:57,143 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 09:25:57,143 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 09:25:57,144 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 09:25:57,148 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 09:25:57,207 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2023-02-17 09:25:57,207 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-17 09:25:57,208 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 12 conjunts are in the unsatisfiable core [2023-02-17 09:25:57,209 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 09:25:57,240 INFO L134 CoverageAnalysis]: Checked inductivity of 266 backedges. 153 proven. 26 refuted. 0 times theorem prover too weak. 87 trivial. 0 not checked. [2023-02-17 09:25:57,240 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 09:25:57,343 INFO L134 CoverageAnalysis]: Checked inductivity of 266 backedges. 123 proven. 57 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2023-02-17 09:25:57,343 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [885135514] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 09:25:57,343 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 09:25:57,344 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 11] total 16 [2023-02-17 09:25:57,344 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1266102943] [2023-02-17 09:25:57,344 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 09:25:57,344 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-02-17 09:25:57,344 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 09:25:57,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-02-17 09:25:57,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2023-02-17 09:25:57,345 INFO L87 Difference]: Start difference. First operand 10494 states and 16348 transitions. Second operand has 16 states, 16 states have (on average 5.1875) internal successors, (83), 16 states have internal predecessors, (83), 9 states have call successors, (14), 2 states have call predecessors, (14), 7 states have return successors, (17), 5 states have call predecessors, (17), 9 states have call successors, (17) [2023-02-17 09:25:58,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 09:25:58,164 INFO L93 Difference]: Finished difference Result 24308 states and 49208 transitions. [2023-02-17 09:25:58,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-02-17 09:25:58,164 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 5.1875) internal successors, (83), 16 states have internal predecessors, (83), 9 states have call successors, (14), 2 states have call predecessors, (14), 7 states have return successors, (17), 5 states have call predecessors, (17), 9 states have call successors, (17) Word has length 100 [2023-02-17 09:25:58,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 09:25:58,234 INFO L225 Difference]: With dead ends: 24308 [2023-02-17 09:25:58,234 INFO L226 Difference]: Without dead ends: 14737 [2023-02-17 09:25:58,291 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 197 SyntacticMatches, 18 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=113, Invalid=267, Unknown=0, NotChecked=0, Total=380 [2023-02-17 09:25:58,291 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 90 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 173 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 136 SdHoareTripleChecker+Invalid, 229 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 173 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-17 09:25:58,291 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [97 Valid, 136 Invalid, 229 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 173 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-17 09:25:58,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14737 states. [2023-02-17 09:25:59,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14737 to 14372. [2023-02-17 09:25:59,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14372 states, 9692 states have (on average 1.0522080066033843) internal successors, (10198), 9951 states have internal predecessors, (10198), 2881 states have call successors, (2881), 496 states have call predecessors, (2881), 1795 states have return successors, (9707), 3924 states have call predecessors, (9707), 2826 states have call successors, (9707) [2023-02-17 09:25:59,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14372 states to 14372 states and 22786 transitions. [2023-02-17 09:25:59,257 INFO L78 Accepts]: Start accepts. Automaton has 14372 states and 22786 transitions. Word has length 100 [2023-02-17 09:25:59,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 09:25:59,257 INFO L495 AbstractCegarLoop]: Abstraction has 14372 states and 22786 transitions. [2023-02-17 09:25:59,258 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 5.1875) internal successors, (83), 16 states have internal predecessors, (83), 9 states have call successors, (14), 2 states have call predecessors, (14), 7 states have return successors, (17), 5 states have call predecessors, (17), 9 states have call successors, (17) [2023-02-17 09:25:59,258 INFO L276 IsEmpty]: Start isEmpty. Operand 14372 states and 22786 transitions. [2023-02-17 09:25:59,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2023-02-17 09:25:59,262 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 09:25:59,262 INFO L195 NwaCegarLoop]: trace histogram [10, 8, 7, 7, 7, 6, 6, 6, 4, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 09:25:59,268 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 09:25:59,466 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2023-02-17 09:25:59,467 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ackermannErr6ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2023-02-17 09:25:59,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 09:25:59,467 INFO L85 PathProgramCache]: Analyzing trace with hash 1104252262, now seen corresponding path program 3 times [2023-02-17 09:25:59,467 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 09:25:59,467 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1299412398] [2023-02-17 09:25:59,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 09:25:59,467 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 09:25:59,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 09:25:59,569 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-02-17 09:25:59,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 09:25:59,609 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-02-17 09:25:59,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 09:25:59,626 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-02-17 09:25:59,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 09:25:59,645 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2023-02-17 09:25:59,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 09:25:59,665 INFO L134 CoverageAnalysis]: Checked inductivity of 227 backedges. 120 proven. 86 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-02-17 09:25:59,666 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 09:25:59,666 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1299412398] [2023-02-17 09:25:59,666 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1299412398] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 09:25:59,666 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1439670213] [2023-02-17 09:25:59,666 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-17 09:25:59,667 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 09:25:59,667 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 09:25:59,668 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 09:25:59,670 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-02-17 09:25:59,737 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2023-02-17 09:25:59,737 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-17 09:25:59,738 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 31 conjunts are in the unsatisfiable core [2023-02-17 09:25:59,739 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 09:25:59,830 INFO L134 CoverageAnalysis]: Checked inductivity of 227 backedges. 113 proven. 41 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2023-02-17 09:25:59,830 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 09:25:59,890 INFO L134 CoverageAnalysis]: Checked inductivity of 227 backedges. 142 proven. 13 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2023-02-17 09:25:59,890 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1439670213] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 09:25:59,890 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 09:25:59,891 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 7, 8] total 29 [2023-02-17 09:25:59,891 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [371297294] [2023-02-17 09:25:59,891 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 09:25:59,891 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-02-17 09:25:59,891 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 09:25:59,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-02-17 09:25:59,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=723, Unknown=0, NotChecked=0, Total=812 [2023-02-17 09:25:59,892 INFO L87 Difference]: Start difference. First operand 14372 states and 22786 transitions. Second operand has 29 states, 29 states have (on average 3.6551724137931036) internal successors, (106), 22 states have internal predecessors, (106), 11 states have call successors, (15), 7 states have call predecessors, (15), 7 states have return successors, (10), 9 states have call predecessors, (10), 4 states have call successors, (10) [2023-02-17 09:26:01,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 09:26:01,143 INFO L93 Difference]: Finished difference Result 25330 states and 43230 transitions. [2023-02-17 09:26:01,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2023-02-17 09:26:01,143 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 3.6551724137931036) internal successors, (106), 22 states have internal predecessors, (106), 11 states have call successors, (15), 7 states have call predecessors, (15), 7 states have return successors, (10), 9 states have call predecessors, (10), 4 states have call successors, (10) Word has length 87 [2023-02-17 09:26:01,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 09:26:01,197 INFO L225 Difference]: With dead ends: 25330 [2023-02-17 09:26:01,197 INFO L226 Difference]: Without dead ends: 13103 [2023-02-17 09:26:01,262 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 246 GetRequests, 177 SyntacticMatches, 4 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 827 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=983, Invalid=3439, Unknown=0, NotChecked=0, Total=4422 [2023-02-17 09:26:01,263 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 222 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 960 mSolverCounterSat, 219 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 222 SdHoareTripleChecker+Valid, 153 SdHoareTripleChecker+Invalid, 1179 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 219 IncrementalHoareTripleChecker+Valid, 960 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-02-17 09:26:01,263 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [222 Valid, 153 Invalid, 1179 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [219 Valid, 960 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-02-17 09:26:01,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13103 states. [2023-02-17 09:26:01,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13103 to 11143. [2023-02-17 09:26:01,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11143 states, 7586 states have (on average 1.0460058001581862) internal successors, (7935), 7834 states have internal predecessors, (7935), 2175 states have call successors, (2175), 424 states have call predecessors, (2175), 1378 states have return successors, (5289), 2884 states have call predecessors, (5289), 2141 states have call successors, (5289) [2023-02-17 09:26:01,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11143 states to 11143 states and 15399 transitions. [2023-02-17 09:26:01,911 INFO L78 Accepts]: Start accepts. Automaton has 11143 states and 15399 transitions. Word has length 87 [2023-02-17 09:26:01,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 09:26:01,911 INFO L495 AbstractCegarLoop]: Abstraction has 11143 states and 15399 transitions. [2023-02-17 09:26:01,911 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 3.6551724137931036) internal successors, (106), 22 states have internal predecessors, (106), 11 states have call successors, (15), 7 states have call predecessors, (15), 7 states have return successors, (10), 9 states have call predecessors, (10), 4 states have call successors, (10) [2023-02-17 09:26:01,911 INFO L276 IsEmpty]: Start isEmpty. Operand 11143 states and 15399 transitions. [2023-02-17 09:26:01,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2023-02-17 09:26:01,914 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 09:26:01,914 INFO L195 NwaCegarLoop]: trace histogram [10, 8, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 09:26:01,920 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2023-02-17 09:26:02,118 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2023-02-17 09:26:02,119 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2023-02-17 09:26:02,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 09:26:02,119 INFO L85 PathProgramCache]: Analyzing trace with hash 1765664819, now seen corresponding path program 4 times [2023-02-17 09:26:02,119 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 09:26:02,119 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [186421628] [2023-02-17 09:26:02,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 09:26:02,119 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 09:26:02,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 09:26:02,196 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-02-17 09:26:02,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 09:26:02,274 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-02-17 09:26:02,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 09:26:02,315 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-02-17 09:26:02,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 09:26:02,346 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-02-17 09:26:02,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 09:26:02,367 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-02-17 09:26:02,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 09:26:02,385 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2023-02-17 09:26:02,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 09:26:02,405 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2023-02-17 09:26:02,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 09:26:02,412 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2023-02-17 09:26:02,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 09:26:02,420 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 51 proven. 69 refuted. 0 times theorem prover too weak. 101 trivial. 0 not checked. [2023-02-17 09:26:02,420 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 09:26:02,420 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [186421628] [2023-02-17 09:26:02,421 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [186421628] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 09:26:02,421 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1486266871] [2023-02-17 09:26:02,421 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-17 09:26:02,421 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 09:26:02,421 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 09:26:02,422 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-17 09:26:02,424 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-02-17 09:26:02,495 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-17 09:26:02,496 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-17 09:26:02,497 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 27 conjunts are in the unsatisfiable core [2023-02-17 09:26:02,498 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 09:26:02,580 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 34 proven. 71 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2023-02-17 09:26:02,580 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 09:26:02,920 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 42 proven. 93 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2023-02-17 09:26:02,920 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1486266871] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 09:26:02,920 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 09:26:02,920 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17, 23] total 42 [2023-02-17 09:26:02,920 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [16848835] [2023-02-17 09:26:02,920 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 09:26:02,921 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2023-02-17 09:26:02,921 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 09:26:02,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2023-02-17 09:26:02,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=207, Invalid=1599, Unknown=0, NotChecked=0, Total=1806 [2023-02-17 09:26:02,922 INFO L87 Difference]: Start difference. First operand 11143 states and 15399 transitions. Second operand has 43 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 33 states have internal predecessors, (80), 9 states have call successors, (11), 3 states have call predecessors, (11), 14 states have return successors, (17), 16 states have call predecessors, (17), 7 states have call successors, (17) [2023-02-17 09:26:06,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 09:26:06,128 INFO L93 Difference]: Finished difference Result 34681 states and 55092 transitions. [2023-02-17 09:26:06,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 143 states. [2023-02-17 09:26:06,129 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 33 states have internal predecessors, (80), 9 states have call successors, (11), 3 states have call predecessors, (11), 14 states have return successors, (17), 16 states have call predecessors, (17), 7 states have call successors, (17) Word has length 91 [2023-02-17 09:26:06,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 09:26:06,271 INFO L225 Difference]: With dead ends: 34681 [2023-02-17 09:26:06,271 INFO L226 Difference]: Without dead ends: 33579 [2023-02-17 09:26:06,303 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 356 GetRequests, 165 SyntacticMatches, 12 SemanticMatches, 179 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12317 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=5454, Invalid=27126, Unknown=0, NotChecked=0, Total=32580 [2023-02-17 09:26:06,304 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 251 mSDsluCounter, 326 mSDsCounter, 0 mSdLazyCounter, 1435 mSolverCounterSat, 725 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 262 SdHoareTripleChecker+Valid, 348 SdHoareTripleChecker+Invalid, 2160 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 725 IncrementalHoareTripleChecker+Valid, 1435 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-02-17 09:26:06,304 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [262 Valid, 348 Invalid, 2160 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [725 Valid, 1435 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-02-17 09:26:06,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33579 states. [2023-02-17 09:26:07,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33579 to 21093. [2023-02-17 09:26:07,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21093 states, 13678 states have (on average 1.0274162889311302) internal successors, (14053), 13909 states have internal predecessors, (14053), 4366 states have call successors, (4366), 532 states have call predecessors, (4366), 3045 states have return successors, (14390), 6651 states have call predecessors, (14390), 4312 states have call successors, (14390) [2023-02-17 09:26:07,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21093 states to 21093 states and 32809 transitions. [2023-02-17 09:26:07,780 INFO L78 Accepts]: Start accepts. Automaton has 21093 states and 32809 transitions. Word has length 91 [2023-02-17 09:26:07,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 09:26:07,781 INFO L495 AbstractCegarLoop]: Abstraction has 21093 states and 32809 transitions. [2023-02-17 09:26:07,781 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 33 states have internal predecessors, (80), 9 states have call successors, (11), 3 states have call predecessors, (11), 14 states have return successors, (17), 16 states have call predecessors, (17), 7 states have call successors, (17) [2023-02-17 09:26:07,781 INFO L276 IsEmpty]: Start isEmpty. Operand 21093 states and 32809 transitions. [2023-02-17 09:26:07,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2023-02-17 09:26:07,787 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 09:26:07,788 INFO L195 NwaCegarLoop]: trace histogram [15, 15, 15, 15, 15, 14, 14, 14, 1, 1, 1, 1, 1, 1] [2023-02-17 09:26:07,792 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2023-02-17 09:26:07,992 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2023-02-17 09:26:07,992 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ackermannErr6ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2023-02-17 09:26:07,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 09:26:07,992 INFO L85 PathProgramCache]: Analyzing trace with hash 1934326320, now seen corresponding path program 3 times [2023-02-17 09:26:07,993 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 09:26:07,993 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [100751501] [2023-02-17 09:26:07,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 09:26:07,993 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 09:26:08,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 09:26:08,404 INFO L134 CoverageAnalysis]: Checked inductivity of 812 backedges. 0 proven. 812 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 09:26:08,404 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 09:26:08,404 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [100751501] [2023-02-17 09:26:08,404 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [100751501] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 09:26:08,404 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [111575563] [2023-02-17 09:26:08,405 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-17 09:26:08,405 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 09:26:08,405 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 09:26:08,406 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-17 09:26:08,408 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-02-17 09:26:08,513 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2023-02-17 09:26:08,513 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-17 09:26:08,514 INFO L263 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 32 conjunts are in the unsatisfiable core [2023-02-17 09:26:08,516 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 09:26:08,773 INFO L134 CoverageAnalysis]: Checked inductivity of 812 backedges. 0 proven. 812 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 09:26:08,773 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 09:26:09,374 INFO L134 CoverageAnalysis]: Checked inductivity of 812 backedges. 0 proven. 812 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 09:26:09,374 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [111575563] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 09:26:09,375 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 09:26:09,375 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32, 32] total 63 [2023-02-17 09:26:09,375 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2109993215] [2023-02-17 09:26:09,375 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 09:26:09,375 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2023-02-17 09:26:09,375 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 09:26:09,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2023-02-17 09:26:09,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=996, Invalid=3036, Unknown=0, NotChecked=0, Total=4032 [2023-02-17 09:26:09,377 INFO L87 Difference]: Start difference. First operand 21093 states and 32809 transitions. Second operand has 64 states, 61 states have (on average 3.4918032786885247) internal successors, (213), 34 states have internal predecessors, (213), 30 states have call successors, (30), 30 states have call predecessors, (30), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 09:26:12,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 09:26:12,673 INFO L93 Difference]: Finished difference Result 36182 states and 56297 transitions. [2023-02-17 09:26:12,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2023-02-17 09:26:12,673 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 61 states have (on average 3.4918032786885247) internal successors, (213), 34 states have internal predecessors, (213), 30 states have call successors, (30), 30 states have call predecessors, (30), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 123 [2023-02-17 09:26:12,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 09:26:12,818 INFO L225 Difference]: With dead ends: 36182 [2023-02-17 09:26:12,818 INFO L226 Difference]: Without dead ends: 36181 [2023-02-17 09:26:12,846 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 335 GetRequests, 186 SyntacticMatches, 28 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4031 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=4654, Invalid=10352, Unknown=0, NotChecked=0, Total=15006 [2023-02-17 09:26:12,846 INFO L413 NwaCegarLoop]: 83 mSDtfsCounter, 1095 mSDsluCounter, 920 mSDsCounter, 0 mSdLazyCounter, 1347 mSolverCounterSat, 611 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1099 SdHoareTripleChecker+Valid, 1003 SdHoareTripleChecker+Invalid, 1958 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 611 IncrementalHoareTripleChecker+Valid, 1347 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-02-17 09:26:12,846 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1099 Valid, 1003 Invalid, 1958 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [611 Valid, 1347 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-02-17 09:26:12,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36181 states. [2023-02-17 09:26:14,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36181 to 36181. [2023-02-17 09:26:14,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36181 states, 23422 states have (on average 1.0283067201776108) internal successors, (24085), 23941 states have internal predecessors, (24085), 7326 states have call successors, (7326), 820 states have call predecessors, (7326), 5429 states have return successors, (24870), 11419 states have call predecessors, (24870), 7272 states have call successors, (24870) [2023-02-17 09:26:15,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36181 states to 36181 states and 56281 transitions. [2023-02-17 09:26:15,013 INFO L78 Accepts]: Start accepts. Automaton has 36181 states and 56281 transitions. Word has length 123 [2023-02-17 09:26:15,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 09:26:15,014 INFO L495 AbstractCegarLoop]: Abstraction has 36181 states and 56281 transitions. [2023-02-17 09:26:15,014 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 61 states have (on average 3.4918032786885247) internal successors, (213), 34 states have internal predecessors, (213), 30 states have call successors, (30), 30 states have call predecessors, (30), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 09:26:15,014 INFO L276 IsEmpty]: Start isEmpty. Operand 36181 states and 56281 transitions. [2023-02-17 09:26:15,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2023-02-17 09:26:15,022 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 09:26:15,022 INFO L195 NwaCegarLoop]: trace histogram [20, 20, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1] [2023-02-17 09:26:15,029 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2023-02-17 09:26:15,222 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 09:26:15,223 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ackermannErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2023-02-17 09:26:15,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 09:26:15,223 INFO L85 PathProgramCache]: Analyzing trace with hash 951429890, now seen corresponding path program 2 times [2023-02-17 09:26:15,223 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 09:26:15,223 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2109746437] [2023-02-17 09:26:15,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 09:26:15,223 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 09:26:15,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 09:26:15,545 INFO L134 CoverageAnalysis]: Checked inductivity of 894 backedges. 0 proven. 867 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2023-02-17 09:26:15,545 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 09:26:15,545 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2109746437] [2023-02-17 09:26:15,545 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2109746437] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 09:26:15,545 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [158497585] [2023-02-17 09:26:15,545 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-17 09:26:15,545 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 09:26:15,545 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 09:26:15,546 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-17 09:26:15,547 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-02-17 09:26:15,640 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-17 09:26:15,640 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-17 09:26:15,645 INFO L263 TraceCheckSpWp]: Trace formula consists of 342 conjuncts, 42 conjunts are in the unsatisfiable core [2023-02-17 09:26:15,647 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 09:26:15,928 INFO L134 CoverageAnalysis]: Checked inductivity of 894 backedges. 0 proven. 867 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2023-02-17 09:26:15,928 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 09:26:16,394 INFO L134 CoverageAnalysis]: Checked inductivity of 894 backedges. 0 proven. 867 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2023-02-17 09:26:16,394 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [158497585] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 09:26:16,394 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 09:26:16,394 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 47 [2023-02-17 09:26:16,394 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1124256791] [2023-02-17 09:26:16,394 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 09:26:16,395 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2023-02-17 09:26:16,395 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 09:26:16,396 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2023-02-17 09:26:16,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=556, Invalid=1700, Unknown=0, NotChecked=0, Total=2256 [2023-02-17 09:26:16,396 INFO L87 Difference]: Start difference. First operand 36181 states and 56281 transitions. Second operand has 48 states, 47 states have (on average 4.340425531914893) internal successors, (204), 26 states have internal predecessors, (204), 22 states have call successors, (40), 22 states have call predecessors, (40), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 09:26:20,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 09:26:20,811 INFO L93 Difference]: Finished difference Result 81606 states and 127883 transitions. [2023-02-17 09:26:20,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2023-02-17 09:26:20,812 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 47 states have (on average 4.340425531914893) internal successors, (204), 26 states have internal predecessors, (204), 22 states have call successors, (40), 22 states have call predecessors, (40), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 141 [2023-02-17 09:26:20,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 09:26:21,113 INFO L225 Difference]: With dead ends: 81606 [2023-02-17 09:26:21,113 INFO L226 Difference]: Without dead ends: 81605 [2023-02-17 09:26:21,147 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 365 GetRequests, 229 SyntacticMatches, 47 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2560 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=2534, Invalid=5656, Unknown=0, NotChecked=0, Total=8190 [2023-02-17 09:26:21,148 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 1858 mSDsluCounter, 502 mSDsCounter, 0 mSdLazyCounter, 874 mSolverCounterSat, 710 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1861 SdHoareTripleChecker+Valid, 529 SdHoareTripleChecker+Invalid, 1584 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 710 IncrementalHoareTripleChecker+Valid, 874 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-02-17 09:26:21,148 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1861 Valid, 529 Invalid, 1584 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [710 Valid, 874 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-02-17 09:26:21,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81605 states. [2023-02-17 09:26:25,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81605 to 81553. [2023-02-17 09:26:25,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81553 states, 52918 states have (on average 1.0290827317736877) internal successors, (54457), 54121 states have internal predecessors, (54457), 16494 states have call successors, (16494), 1900 states have call predecessors, (16494), 12137 states have return successors, (56910), 25531 states have call predecessors, (56910), 16380 states have call successors, (56910) [2023-02-17 09:26:26,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81553 states to 81553 states and 127861 transitions. [2023-02-17 09:26:26,225 INFO L78 Accepts]: Start accepts. Automaton has 81553 states and 127861 transitions. Word has length 141 [2023-02-17 09:26:26,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 09:26:26,226 INFO L495 AbstractCegarLoop]: Abstraction has 81553 states and 127861 transitions. [2023-02-17 09:26:26,226 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 47 states have (on average 4.340425531914893) internal successors, (204), 26 states have internal predecessors, (204), 22 states have call successors, (40), 22 states have call predecessors, (40), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 09:26:26,226 INFO L276 IsEmpty]: Start isEmpty. Operand 81553 states and 127861 transitions. [2023-02-17 09:26:26,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 259 [2023-02-17 09:26:26,242 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 09:26:26,242 INFO L195 NwaCegarLoop]: trace histogram [29, 22, 18, 18, 18, 18, 17, 17, 17, 7, 7, 7, 7, 7, 7, 6, 6, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1] [2023-02-17 09:26:26,256 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2023-02-17 09:26:26,449 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2023-02-17 09:26:26,450 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ackermannErr7ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2023-02-17 09:26:26,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 09:26:26,451 INFO L85 PathProgramCache]: Analyzing trace with hash -1979180790, now seen corresponding path program 1 times [2023-02-17 09:26:26,451 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 09:26:26,451 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [695057258] [2023-02-17 09:26:26,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 09:26:26,451 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 09:26:26,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 09:26:26,659 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2023-02-17 09:26:26,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 09:26:26,758 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-02-17 09:26:26,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 09:26:26,835 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-02-17 09:26:26,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 09:26:26,861 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-02-17 09:26:26,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 09:26:26,879 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-02-17 09:26:26,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 09:26:26,890 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-02-17 09:26:26,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 09:26:26,903 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2023-02-17 09:26:26,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 09:26:26,919 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2023-02-17 09:26:26,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 09:26:26,968 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-02-17 09:26:26,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 09:26:27,004 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-02-17 09:26:27,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 09:26:27,033 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-02-17 09:26:27,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 09:26:27,053 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-02-17 09:26:27,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 09:26:27,069 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-02-17 09:26:27,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 09:26:27,072 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2023-02-17 09:26:27,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 09:26:27,074 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2023-02-17 09:26:27,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 09:26:27,075 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2023-02-17 09:26:27,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 09:26:27,077 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2023-02-17 09:26:27,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 09:26:27,079 INFO L134 CoverageAnalysis]: Checked inductivity of 2186 backedges. 766 proven. 214 refuted. 0 times theorem prover too weak. 1206 trivial. 0 not checked. [2023-02-17 09:26:27,079 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 09:26:27,079 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [695057258] [2023-02-17 09:26:27,079 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [695057258] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 09:26:27,079 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2139979822] [2023-02-17 09:26:27,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 09:26:27,080 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 09:26:27,080 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 09:26:27,081 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-17 09:26:27,083 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2023-02-17 09:26:27,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 09:26:27,209 INFO L263 TraceCheckSpWp]: Trace formula consists of 600 conjuncts, 25 conjunts are in the unsatisfiable core [2023-02-17 09:26:27,211 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 09:26:27,289 INFO L134 CoverageAnalysis]: Checked inductivity of 2186 backedges. 754 proven. 216 refuted. 0 times theorem prover too weak. 1216 trivial. 0 not checked. [2023-02-17 09:26:27,290 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 09:26:27,592 INFO L134 CoverageAnalysis]: Checked inductivity of 2186 backedges. 770 proven. 263 refuted. 0 times theorem prover too weak. 1153 trivial. 0 not checked. [2023-02-17 09:26:27,592 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2139979822] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 09:26:27,592 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 09:26:27,592 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 21] total 27 [2023-02-17 09:26:27,593 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [433487494] [2023-02-17 09:26:27,593 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 09:26:27,593 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-02-17 09:26:27,593 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 09:26:27,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-02-17 09:26:27,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=589, Unknown=0, NotChecked=0, Total=702 [2023-02-17 09:26:27,595 INFO L87 Difference]: Start difference. First operand 81553 states and 127861 transitions. Second operand has 27 states, 27 states have (on average 4.555555555555555) internal successors, (123), 24 states have internal predecessors, (123), 16 states have call successors, (18), 2 states have call predecessors, (18), 14 states have return successors, (29), 12 states have call predecessors, (29), 15 states have call successors, (29) [2023-02-17 09:26:33,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 09:26:33,806 INFO L93 Difference]: Finished difference Result 191506 states and 387267 transitions. [2023-02-17 09:26:33,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-02-17 09:26:33,806 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 4.555555555555555) internal successors, (123), 24 states have internal predecessors, (123), 16 states have call successors, (18), 2 states have call predecessors, (18), 14 states have return successors, (29), 12 states have call predecessors, (29), 15 states have call successors, (29) Word has length 258 [2023-02-17 09:26:33,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 09:26:34,700 INFO L225 Difference]: With dead ends: 191506 [2023-02-17 09:26:34,700 INFO L226 Difference]: Without dead ends: 119313 [2023-02-17 09:26:35,326 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 593 GetRequests, 519 SyntacticMatches, 31 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 569 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=423, Invalid=1557, Unknown=0, NotChecked=0, Total=1980 [2023-02-17 09:26:35,327 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 54 mSDsluCounter, 239 mSDsCounter, 0 mSdLazyCounter, 556 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 273 SdHoareTripleChecker+Invalid, 638 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 556 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-17 09:26:35,327 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [59 Valid, 273 Invalid, 638 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 556 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-17 09:26:35,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119313 states.