./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 [2023-02-18 23:33:36,666 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-02-18 23:33:36,668 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-02-18 23:33:36,697 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-02-18 23:33:36,697 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-02-18 23:33:36,699 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-02-18 23:33:36,701 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-02-18 23:33:36,703 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-02-18 23:33:36,704 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-02-18 23:33:36,708 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-02-18 23:33:36,709 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-02-18 23:33:36,710 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-02-18 23:33:36,710 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-02-18 23:33:36,712 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-02-18 23:33:36,713 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-02-18 23:33:36,714 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-02-18 23:33:36,714 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-02-18 23:33:36,715 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-02-18 23:33:36,716 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-02-18 23:33:36,720 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-02-18 23:33:36,720 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-02-18 23:33:36,721 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-02-18 23:33:36,722 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-02-18 23:33:36,722 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-02-18 23:33:36,728 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-02-18 23:33:36,728 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-02-18 23:33:36,728 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-02-18 23:33:36,729 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-02-18 23:33:36,730 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-02-18 23:33:36,730 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-02-18 23:33:36,730 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-02-18 23:33:36,731 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-02-18 23:33:36,732 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-02-18 23:33:36,732 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-02-18 23:33:36,733 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-02-18 23:33:36,733 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-02-18 23:33:36,734 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-02-18 23:33:36,734 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-02-18 23:33:36,734 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-02-18 23:33:36,735 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-02-18 23:33:36,736 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-02-18 23:33:36,736 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Overflow-64bit-Automizer_Default.epf [2023-02-18 23:33:36,757 INFO L113 SettingsManager]: Loading preferences was successful [2023-02-18 23:33:36,757 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-02-18 23:33:36,758 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-02-18 23:33:36,758 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-02-18 23:33:36,758 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-02-18 23:33:36,759 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-02-18 23:33:36,759 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-02-18 23:33:36,759 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-02-18 23:33:36,759 INFO L138 SettingsManager]: * Use SBE=true [2023-02-18 23:33:36,759 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-02-18 23:33:36,760 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-02-18 23:33:36,760 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-02-18 23:33:36,760 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-02-18 23:33:36,761 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-02-18 23:33:36,761 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-02-18 23:33:36,761 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-02-18 23:33:36,761 INFO L138 SettingsManager]: * Check absence of signed integer overflows=true [2023-02-18 23:33:36,761 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-02-18 23:33:36,761 INFO L138 SettingsManager]: * Use constant arrays=true [2023-02-18 23:33:36,761 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-02-18 23:33:36,762 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-02-18 23:33:36,762 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-02-18 23:33:36,762 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-02-18 23:33:36,762 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-18 23:33:36,762 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-02-18 23:33:36,762 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-02-18 23:33:36,763 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-02-18 23:33:36,763 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-02-18 23:33:36,763 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-02-18 23:33:36,763 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-02-18 23:33:36,763 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-02-18 23:33:36,763 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-02-18 23:33:36,764 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-02-18 23:33:36,764 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-02-18 23:33:36,764 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 380ed529f726f53285b49ce40e57404dbe066b029b8c3af7ce337366515780a5 [2023-02-18 23:33:36,970 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-02-18 23:33:36,983 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-02-18 23:33:36,984 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-02-18 23:33:36,985 INFO L271 PluginConnector]: Initializing CDTParser... [2023-02-18 23:33:36,989 INFO L275 PluginConnector]: CDTParser initialized [2023-02-18 23:33:36,990 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/termination-numeric/Ackermann01-1.c [2023-02-18 23:33:37,869 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-02-18 23:33:38,027 INFO L351 CDTParser]: Found 1 translation units. [2023-02-18 23:33:38,028 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/termination-numeric/Ackermann01-1.c [2023-02-18 23:33:38,032 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/427d11a16/4223f1b97fab4b4098f75997f0cc136b/FLAG9b98639e7 [2023-02-18 23:33:38,041 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/427d11a16/4223f1b97fab4b4098f75997f0cc136b [2023-02-18 23:33:38,043 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-02-18 23:33:38,044 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-02-18 23:33:38,045 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-02-18 23:33:38,045 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-02-18 23:33:38,047 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-02-18 23:33:38,048 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.02 11:33:38" (1/1) ... [2023-02-18 23:33:38,049 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1eb208c5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 11:33:38, skipping insertion in model container [2023-02-18 23:33:38,049 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.02 11:33:38" (1/1) ... [2023-02-18 23:33:38,053 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-02-18 23:33:38,062 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-02-18 23:33:38,157 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] [2023-02-18 23:33:38,157 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-18 23:33:38,165 INFO L203 MainTranslator]: Completed pre-run [2023-02-18 23:33:38,199 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] [2023-02-18 23:33:38,200 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-18 23:33:38,209 INFO L208 MainTranslator]: Completed translation [2023-02-18 23:33:38,210 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 11:33:38 WrapperNode [2023-02-18 23:33:38,210 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-02-18 23:33:38,211 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-02-18 23:33:38,211 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-02-18 23:33:38,211 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-02-18 23:33:38,216 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 11:33:38" (1/1) ... [2023-02-18 23:33:38,221 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 11:33:38" (1/1) ... [2023-02-18 23:33:38,230 INFO L138 Inliner]: procedures = 13, calls = 11, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 32 [2023-02-18 23:33:38,231 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-02-18 23:33:38,231 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-02-18 23:33:38,231 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-02-18 23:33:38,231 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-02-18 23:33:38,237 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 11:33:38" (1/1) ... [2023-02-18 23:33:38,237 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 11:33:38" (1/1) ... [2023-02-18 23:33:38,245 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 11:33:38" (1/1) ... [2023-02-18 23:33:38,245 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 11:33:38" (1/1) ... [2023-02-18 23:33:38,250 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 11:33:38" (1/1) ... [2023-02-18 23:33:38,252 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 11:33:38" (1/1) ... [2023-02-18 23:33:38,253 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 11:33:38" (1/1) ... [2023-02-18 23:33:38,253 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 11:33:38" (1/1) ... [2023-02-18 23:33:38,255 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-02-18 23:33:38,256 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-02-18 23:33:38,256 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-02-18 23:33:38,256 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-02-18 23:33:38,257 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 11:33:38" (1/1) ... [2023-02-18 23:33:38,261 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-18 23:33:38,267 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 23:33:38,285 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-02-18 23:33:38,303 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-02-18 23:33:38,314 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-02-18 23:33:38,314 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-02-18 23:33:38,314 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-02-18 23:33:38,314 INFO L130 BoogieDeclarations]: Found specification of procedure ackermann [2023-02-18 23:33:38,314 INFO L138 BoogieDeclarations]: Found implementation of procedure ackermann [2023-02-18 23:33:38,314 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-02-18 23:33:38,358 INFO L235 CfgBuilder]: Building ICFG [2023-02-18 23:33:38,359 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2023-02-18 23:33:38,508 INFO L276 CfgBuilder]: Performing block encoding [2023-02-18 23:33:38,512 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-02-18 23:33:38,512 INFO L300 CfgBuilder]: Removed 0 assume(true) statements. [2023-02-18 23:33:38,514 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.02 11:33:38 BoogieIcfgContainer [2023-02-18 23:33:38,514 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-02-18 23:33:38,515 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-02-18 23:33:38,515 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-02-18 23:33:38,517 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-02-18 23:33:38,517 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.02 11:33:38" (1/3) ... [2023-02-18 23:33:38,518 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@756ef8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.02 11:33:38, skipping insertion in model container [2023-02-18 23:33:38,518 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 11:33:38" (2/3) ... [2023-02-18 23:33:38,518 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@756ef8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.02 11:33:38, skipping insertion in model container [2023-02-18 23:33:38,518 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.02 11:33:38" (3/3) ... [2023-02-18 23:33:38,519 INFO L112 eAbstractionObserver]: Analyzing ICFG Ackermann01-1.c [2023-02-18 23:33:38,540 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-02-18 23:33:38,552 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 8 error locations. [2023-02-18 23:33:38,598 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-02-18 23:33:38,603 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;@550f6d83, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-02-18 23:33:38,603 INFO L358 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2023-02-18 23:33:38,606 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) [2023-02-18 23:33:38,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-02-18 23:33:38,610 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 23:33:38,610 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 23:33:38,611 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2023-02-18 23:33:38,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 23:33:38,614 INFO L85 PathProgramCache]: Analyzing trace with hash 180762217, now seen corresponding path program 1 times [2023-02-18 23:33:38,620 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 23:33:38,620 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2134344998] [2023-02-18 23:33:38,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 23:33:38,621 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 23:33:38,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 23:33:38,794 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 23:33:38,794 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 23:33:38,795 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2134344998] [2023-02-18 23:33:38,795 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2134344998] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 23:33:38,795 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 23:33:38,796 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-18 23:33:38,797 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1431282189] [2023-02-18 23:33:38,797 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 23:33:38,800 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-18 23:33:38,800 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 23:33:38,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-18 23:33:38,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-02-18 23:33:38,836 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) [2023-02-18 23:33:38,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 23:33:38,967 INFO L93 Difference]: Finished difference Result 73 states and 85 transitions. [2023-02-18 23:33:38,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-18 23:33:38,970 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 [2023-02-18 23:33:38,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 23:33:38,983 INFO L225 Difference]: With dead ends: 73 [2023-02-18 23:33:38,983 INFO L226 Difference]: Without dead ends: 59 [2023-02-18 23:33:38,986 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 [2023-02-18 23:33:38,990 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 55 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s 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 [2023-02-18 23:33:38,991 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] [2023-02-18 23:33:39,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2023-02-18 23:33:39,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 51. [2023-02-18 23:33:39,025 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) [2023-02-18 23:33:39,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 65 transitions. [2023-02-18 23:33:39,032 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 65 transitions. Word has length 8 [2023-02-18 23:33:39,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 23:33:39,032 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 65 transitions. [2023-02-18 23:33:39,033 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) [2023-02-18 23:33:39,033 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 65 transitions. [2023-02-18 23:33:39,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2023-02-18 23:33:39,033 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 23:33:39,034 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 23:33:39,034 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-02-18 23:33:39,034 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2023-02-18 23:33:39,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 23:33:39,036 INFO L85 PathProgramCache]: Analyzing trace with hash 1308666490, now seen corresponding path program 1 times [2023-02-18 23:33:39,036 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 23:33:39,036 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [659386058] [2023-02-18 23:33:39,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 23:33:39,037 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 23:33:39,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 23:33:39,085 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 23:33:39,086 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 23:33:39,086 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [659386058] [2023-02-18 23:33:39,086 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [659386058] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 23:33:39,086 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 23:33:39,087 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-18 23:33:39,087 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1602060182] [2023-02-18 23:33:39,087 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 23:33:39,088 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-18 23:33:39,088 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 23:33:39,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-18 23:33:39,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-02-18 23:33:39,089 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) [2023-02-18 23:33:39,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 23:33:39,148 INFO L93 Difference]: Finished difference Result 101 states and 137 transitions. [2023-02-18 23:33:39,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-18 23:33:39,149 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 [2023-02-18 23:33:39,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 23:33:39,153 INFO L225 Difference]: With dead ends: 101 [2023-02-18 23:33:39,153 INFO L226 Difference]: Without dead ends: 95 [2023-02-18 23:33:39,155 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 [2023-02-18 23:33:39,157 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, 0.0s IncrementalHoareTripleChecker+Time [2023-02-18 23:33:39,157 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 91 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 23:33:39,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2023-02-18 23:33:39,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 85. [2023-02-18 23:33:39,171 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) [2023-02-18 23:33:39,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 115 transitions. [2023-02-18 23:33:39,175 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 115 transitions. Word has length 9 [2023-02-18 23:33:39,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 23:33:39,176 INFO L495 AbstractCegarLoop]: Abstraction has 85 states and 115 transitions. [2023-02-18 23:33:39,176 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) [2023-02-18 23:33:39,176 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 115 transitions. [2023-02-18 23:33:39,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2023-02-18 23:33:39,176 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 23:33:39,177 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 23:33:39,181 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-02-18 23:33:39,181 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2023-02-18 23:33:39,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 23:33:39,182 INFO L85 PathProgramCache]: Analyzing trace with hash 1308661493, now seen corresponding path program 1 times [2023-02-18 23:33:39,182 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 23:33:39,182 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [518498529] [2023-02-18 23:33:39,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 23:33:39,182 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 23:33:39,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 23:33:39,240 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 23:33:39,240 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 23:33:39,241 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [518498529] [2023-02-18 23:33:39,241 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [518498529] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 23:33:39,241 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 23:33:39,241 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-18 23:33:39,241 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2012897748] [2023-02-18 23:33:39,241 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 23:33:39,242 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-18 23:33:39,242 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 23:33:39,242 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-18 23:33:39,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-02-18 23:33:39,243 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) [2023-02-18 23:33:39,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 23:33:39,300 INFO L93 Difference]: Finished difference Result 114 states and 152 transitions. [2023-02-18 23:33:39,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-18 23:33:39,301 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 [2023-02-18 23:33:39,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 23:33:39,302 INFO L225 Difference]: With dead ends: 114 [2023-02-18 23:33:39,302 INFO L226 Difference]: Without dead ends: 110 [2023-02-18 23:33:39,303 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 [2023-02-18 23:33:39,303 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 [2023-02-18 23:33:39,304 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] [2023-02-18 23:33:39,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2023-02-18 23:33:39,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 102. [2023-02-18 23:33:39,318 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) [2023-02-18 23:33:39,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 136 transitions. [2023-02-18 23:33:39,319 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 136 transitions. Word has length 9 [2023-02-18 23:33:39,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 23:33:39,320 INFO L495 AbstractCegarLoop]: Abstraction has 102 states and 136 transitions. [2023-02-18 23:33:39,320 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) [2023-02-18 23:33:39,320 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 136 transitions. [2023-02-18 23:33:39,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-02-18 23:33:39,320 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 23:33:39,321 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 23:33:39,321 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-02-18 23:33:39,321 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ackermannErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2023-02-18 23:33:39,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 23:33:39,322 INFO L85 PathProgramCache]: Analyzing trace with hash 1913955596, now seen corresponding path program 1 times [2023-02-18 23:33:39,322 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 23:33:39,322 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2030585515] [2023-02-18 23:33:39,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 23:33:39,322 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 23:33:39,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 23:33:39,352 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 23:33:39,352 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 23:33:39,352 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2030585515] [2023-02-18 23:33:39,353 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2030585515] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 23:33:39,353 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 23:33:39,353 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-18 23:33:39,353 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2139352985] [2023-02-18 23:33:39,354 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 23:33:39,354 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-18 23:33:39,354 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 23:33:39,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-18 23:33:39,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-02-18 23:33:39,355 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) [2023-02-18 23:33:39,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 23:33:39,386 INFO L93 Difference]: Finished difference Result 102 states and 136 transitions. [2023-02-18 23:33:39,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-02-18 23:33:39,387 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 [2023-02-18 23:33:39,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 23:33:39,388 INFO L225 Difference]: With dead ends: 102 [2023-02-18 23:33:39,388 INFO L226 Difference]: Without dead ends: 100 [2023-02-18 23:33:39,388 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 [2023-02-18 23:33:39,389 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 [2023-02-18 23:33:39,389 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] [2023-02-18 23:33:39,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2023-02-18 23:33:39,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 100. [2023-02-18 23:33:39,397 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) [2023-02-18 23:33:39,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 126 transitions. [2023-02-18 23:33:39,398 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 126 transitions. Word has length 10 [2023-02-18 23:33:39,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 23:33:39,399 INFO L495 AbstractCegarLoop]: Abstraction has 100 states and 126 transitions. [2023-02-18 23:33:39,399 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) [2023-02-18 23:33:39,399 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 126 transitions. [2023-02-18 23:33:39,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-02-18 23:33:39,399 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 23:33:39,400 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 23:33:39,400 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-02-18 23:33:39,400 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2023-02-18 23:33:39,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 23:33:39,401 INFO L85 PathProgramCache]: Analyzing trace with hash 1669645175, now seen corresponding path program 1 times [2023-02-18 23:33:39,401 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 23:33:39,401 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [43013261] [2023-02-18 23:33:39,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 23:33:39,401 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 23:33:39,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 23:33:39,435 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 23:33:39,436 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 23:33:39,436 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [43013261] [2023-02-18 23:33:39,436 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [43013261] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 23:33:39,436 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 23:33:39,436 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-18 23:33:39,437 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1327888659] [2023-02-18 23:33:39,437 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 23:33:39,437 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-18 23:33:39,437 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 23:33:39,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-18 23:33:39,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-18 23:33:39,438 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) [2023-02-18 23:33:39,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 23:33:39,472 INFO L93 Difference]: Finished difference Result 168 states and 221 transitions. [2023-02-18 23:33:39,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-18 23:33:39,473 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 [2023-02-18 23:33:39,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 23:33:39,474 INFO L225 Difference]: With dead ends: 168 [2023-02-18 23:33:39,474 INFO L226 Difference]: Without dead ends: 97 [2023-02-18 23:33:39,475 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 [2023-02-18 23:33:39,476 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 [2023-02-18 23:33:39,476 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] [2023-02-18 23:33:39,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2023-02-18 23:33:39,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 96. [2023-02-18 23:33:39,489 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) [2023-02-18 23:33:39,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 119 transitions. [2023-02-18 23:33:39,491 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 119 transitions. Word has length 15 [2023-02-18 23:33:39,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 23:33:39,491 INFO L495 AbstractCegarLoop]: Abstraction has 96 states and 119 transitions. [2023-02-18 23:33:39,491 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) [2023-02-18 23:33:39,491 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 119 transitions. [2023-02-18 23:33:39,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-02-18 23:33:39,492 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 23:33:39,492 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 23:33:39,492 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-02-18 23:33:39,492 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ackermannErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2023-02-18 23:33:39,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 23:33:39,495 INFO L85 PathProgramCache]: Analyzing trace with hash 1669645399, now seen corresponding path program 1 times [2023-02-18 23:33:39,496 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 23:33:39,496 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1350669637] [2023-02-18 23:33:39,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 23:33:39,496 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 23:33:39,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 23:33:39,539 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 23:33:39,540 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 23:33:39,540 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1350669637] [2023-02-18 23:33:39,540 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1350669637] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 23:33:39,540 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1596800751] [2023-02-18 23:33:39,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 23:33:39,541 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 23:33:39,541 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 23:33:39,544 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 23:33:39,545 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-02-18 23:33:39,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 23:33:39,581 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 6 conjunts are in the unsatisfiable core [2023-02-18 23:33:39,585 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 23:33:39,629 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 23:33:39,629 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 23:33:39,672 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 23:33:39,673 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1596800751] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 23:33:39,673 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 23:33:39,673 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 11 [2023-02-18 23:33:39,673 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2001452951] [2023-02-18 23:33:39,673 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 23:33:39,673 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-02-18 23:33:39,674 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 23:33:39,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-02-18 23:33:39,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2023-02-18 23:33:39,674 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) [2023-02-18 23:33:39,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 23:33:39,866 INFO L93 Difference]: Finished difference Result 274 states and 356 transitions. [2023-02-18 23:33:39,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-02-18 23:33:39,866 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 [2023-02-18 23:33:39,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 23:33:39,868 INFO L225 Difference]: With dead ends: 274 [2023-02-18 23:33:39,868 INFO L226 Difference]: Without dead ends: 272 [2023-02-18 23:33:39,869 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 [2023-02-18 23:33:39,870 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 [2023-02-18 23:33:39,870 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] [2023-02-18 23:33:39,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2023-02-18 23:33:39,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 236. [2023-02-18 23:33:39,903 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) [2023-02-18 23:33:39,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 299 transitions. [2023-02-18 23:33:39,905 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 299 transitions. Word has length 15 [2023-02-18 23:33:39,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 23:33:39,905 INFO L495 AbstractCegarLoop]: Abstraction has 236 states and 299 transitions. [2023-02-18 23:33:39,905 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) [2023-02-18 23:33:39,905 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 299 transitions. [2023-02-18 23:33:39,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-02-18 23:33:39,906 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 23:33:39,906 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 23:33:39,915 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-02-18 23:33:40,115 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 [2023-02-18 23:33:40,115 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2023-02-18 23:33:40,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 23:33:40,116 INFO L85 PathProgramCache]: Analyzing trace with hash 1422985811, now seen corresponding path program 1 times [2023-02-18 23:33:40,116 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 23:33:40,116 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2077657930] [2023-02-18 23:33:40,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 23:33:40,117 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 23:33:40,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 23:33:40,211 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 23:33:40,211 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 23:33:40,211 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2077657930] [2023-02-18 23:33:40,212 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2077657930] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 23:33:40,212 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [418411386] [2023-02-18 23:33:40,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 23:33:40,212 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 23:33:40,212 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 23:33:40,225 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 23:33:40,228 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-02-18 23:33:40,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 23:33:40,258 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjunts are in the unsatisfiable core [2023-02-18 23:33:40,259 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 23:33:40,294 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 23:33:40,294 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 23:33:40,326 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 23:33:40,326 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [418411386] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 23:33:40,326 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 23:33:40,326 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 11 [2023-02-18 23:33:40,327 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [5180437] [2023-02-18 23:33:40,327 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 23:33:40,327 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-02-18 23:33:40,327 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 23:33:40,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-02-18 23:33:40,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2023-02-18 23:33:40,328 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) [2023-02-18 23:33:40,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 23:33:40,486 INFO L93 Difference]: Finished difference Result 512 states and 695 transitions. [2023-02-18 23:33:40,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-02-18 23:33:40,486 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 [2023-02-18 23:33:40,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 23:33:40,489 INFO L225 Difference]: With dead ends: 512 [2023-02-18 23:33:40,489 INFO L226 Difference]: Without dead ends: 510 [2023-02-18 23:33:40,490 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 [2023-02-18 23:33:40,490 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 [2023-02-18 23:33:40,491 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] [2023-02-18 23:33:40,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 510 states. [2023-02-18 23:33:40,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 510 to 445. [2023-02-18 23:33:40,523 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) [2023-02-18 23:33:40,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 445 states to 445 states and 561 transitions. [2023-02-18 23:33:40,528 INFO L78 Accepts]: Start accepts. Automaton has 445 states and 561 transitions. Word has length 16 [2023-02-18 23:33:40,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 23:33:40,529 INFO L495 AbstractCegarLoop]: Abstraction has 445 states and 561 transitions. [2023-02-18 23:33:40,529 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) [2023-02-18 23:33:40,529 INFO L276 IsEmpty]: Start isEmpty. Operand 445 states and 561 transitions. [2023-02-18 23:33:40,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-02-18 23:33:40,532 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 23:33:40,532 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] [2023-02-18 23:33:40,551 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-02-18 23:33:40,754 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 [2023-02-18 23:33:40,754 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2023-02-18 23:33:40,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 23:33:40,755 INFO L85 PathProgramCache]: Analyzing trace with hash 1106403678, now seen corresponding path program 1 times [2023-02-18 23:33:40,755 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 23:33:40,755 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1985772566] [2023-02-18 23:33:40,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 23:33:40,756 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 23:33:40,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 23:33:40,827 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-02-18 23:33:40,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 23:33:40,844 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-18 23:33:40,844 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 23:33:40,845 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1985772566] [2023-02-18 23:33:40,849 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1985772566] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 23:33:40,850 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [375431865] [2023-02-18 23:33:40,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 23:33:40,850 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 23:33:40,851 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 23:33:40,851 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 23:33:40,854 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-02-18 23:33:40,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 23:33:40,880 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 6 conjunts are in the unsatisfiable core [2023-02-18 23:33:40,881 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 23:33:40,912 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-18 23:33:40,912 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-18 23:33:40,913 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [375431865] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 23:33:40,913 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-02-18 23:33:40,913 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7] total 12 [2023-02-18 23:33:40,913 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [346958941] [2023-02-18 23:33:40,913 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 23:33:40,913 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-02-18 23:33:40,913 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 23:33:40,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-02-18 23:33:40,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2023-02-18 23:33:40,914 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) [2023-02-18 23:33:41,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 23:33:41,004 INFO L93 Difference]: Finished difference Result 478 states and 600 transitions. [2023-02-18 23:33:41,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-02-18 23:33:41,005 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 [2023-02-18 23:33:41,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 23:33:41,007 INFO L225 Difference]: With dead ends: 478 [2023-02-18 23:33:41,007 INFO L226 Difference]: Without dead ends: 477 [2023-02-18 23:33:41,007 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 [2023-02-18 23:33:41,008 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 [2023-02-18 23:33:41,008 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] [2023-02-18 23:33:41,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 477 states. [2023-02-18 23:33:41,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 477 to 444. [2023-02-18 23:33:41,022 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) [2023-02-18 23:33:41,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 444 states to 444 states and 557 transitions. [2023-02-18 23:33:41,025 INFO L78 Accepts]: Start accepts. Automaton has 444 states and 557 transitions. Word has length 24 [2023-02-18 23:33:41,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 23:33:41,025 INFO L495 AbstractCegarLoop]: Abstraction has 444 states and 557 transitions. [2023-02-18 23:33:41,025 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) [2023-02-18 23:33:41,025 INFO L276 IsEmpty]: Start isEmpty. Operand 444 states and 557 transitions. [2023-02-18 23:33:41,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-02-18 23:33:41,026 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 23:33:41,026 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] [2023-02-18 23:33:41,030 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-02-18 23:33:41,231 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 [2023-02-18 23:33:41,232 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2023-02-18 23:33:41,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 23:33:41,232 INFO L85 PathProgramCache]: Analyzing trace with hash -61224288, now seen corresponding path program 1 times [2023-02-18 23:33:41,232 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 23:33:41,232 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [498328891] [2023-02-18 23:33:41,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 23:33:41,233 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 23:33:41,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 23:33:41,276 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-02-18 23:33:41,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 23:33:41,289 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-18 23:33:41,289 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 23:33:41,289 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [498328891] [2023-02-18 23:33:41,289 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [498328891] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 23:33:41,289 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [388167854] [2023-02-18 23:33:41,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 23:33:41,290 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 23:33:41,290 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 23:33:41,291 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 23:33:41,293 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-02-18 23:33:41,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 23:33:41,321 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 10 conjunts are in the unsatisfiable core [2023-02-18 23:33:41,322 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 23:33:41,359 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-18 23:33:41,359 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 23:33:41,439 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-18 23:33:41,440 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [388167854] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 23:33:41,440 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 23:33:41,440 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 19 [2023-02-18 23:33:41,440 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [829334535] [2023-02-18 23:33:41,440 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 23:33:41,441 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-02-18 23:33:41,441 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 23:33:41,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-02-18 23:33:41,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=299, Unknown=0, NotChecked=0, Total=342 [2023-02-18 23:33:41,441 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) [2023-02-18 23:33:41,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 23:33:41,753 INFO L93 Difference]: Finished difference Result 1120 states and 1574 transitions. [2023-02-18 23:33:41,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-02-18 23:33:41,753 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 [2023-02-18 23:33:41,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 23:33:41,757 INFO L225 Difference]: With dead ends: 1120 [2023-02-18 23:33:41,757 INFO L226 Difference]: Without dead ends: 780 [2023-02-18 23:33:41,761 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 [2023-02-18 23:33:41,762 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 [2023-02-18 23:33:41,763 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] [2023-02-18 23:33:41,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 780 states. [2023-02-18 23:33:41,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 780 to 578. [2023-02-18 23:33:41,791 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) [2023-02-18 23:33:41,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 578 states to 578 states and 720 transitions. [2023-02-18 23:33:41,797 INFO L78 Accepts]: Start accepts. Automaton has 578 states and 720 transitions. Word has length 25 [2023-02-18 23:33:41,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 23:33:41,798 INFO L495 AbstractCegarLoop]: Abstraction has 578 states and 720 transitions. [2023-02-18 23:33:41,799 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) [2023-02-18 23:33:41,799 INFO L276 IsEmpty]: Start isEmpty. Operand 578 states and 720 transitions. [2023-02-18 23:33:41,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-02-18 23:33:41,801 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 23:33:41,801 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2023-02-18 23:33:41,825 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-02-18 23:33:42,009 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 [2023-02-18 23:33:42,009 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ackermannErr6ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2023-02-18 23:33:42,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 23:33:42,009 INFO L85 PathProgramCache]: Analyzing trace with hash -1846384600, now seen corresponding path program 1 times [2023-02-18 23:33:42,009 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 23:33:42,009 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [408088624] [2023-02-18 23:33:42,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 23:33:42,010 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 23:33:42,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 23:33:42,048 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 23:33:42,048 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 23:33:42,049 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [408088624] [2023-02-18 23:33:42,049 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [408088624] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 23:33:42,049 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1040731114] [2023-02-18 23:33:42,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 23:33:42,049 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 23:33:42,049 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 23:33:42,053 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 23:33:42,055 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-02-18 23:33:42,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 23:33:42,079 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 8 conjunts are in the unsatisfiable core [2023-02-18 23:33:42,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 23:33:42,099 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 23:33:42,099 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 23:33:42,139 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 23:33:42,139 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1040731114] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 23:33:42,139 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 23:33:42,139 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 15 [2023-02-18 23:33:42,139 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1861387996] [2023-02-18 23:33:42,139 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 23:33:42,139 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-02-18 23:33:42,139 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 23:33:42,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-02-18 23:33:42,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2023-02-18 23:33:42,140 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) [2023-02-18 23:33:42,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 23:33:42,354 INFO L93 Difference]: Finished difference Result 1048 states and 1335 transitions. [2023-02-18 23:33:42,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-02-18 23:33:42,354 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 [2023-02-18 23:33:42,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 23:33:42,358 INFO L225 Difference]: With dead ends: 1048 [2023-02-18 23:33:42,358 INFO L226 Difference]: Without dead ends: 1047 [2023-02-18 23:33:42,359 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 [2023-02-18 23:33:42,359 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 [2023-02-18 23:33:42,359 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] [2023-02-18 23:33:42,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1047 states. [2023-02-18 23:33:42,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1047 to 894. [2023-02-18 23:33:42,385 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) [2023-02-18 23:33:42,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 894 states to 894 states and 1088 transitions. [2023-02-18 23:33:42,388 INFO L78 Accepts]: Start accepts. Automaton has 894 states and 1088 transitions. Word has length 27 [2023-02-18 23:33:42,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 23:33:42,388 INFO L495 AbstractCegarLoop]: Abstraction has 894 states and 1088 transitions. [2023-02-18 23:33:42,388 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) [2023-02-18 23:33:42,388 INFO L276 IsEmpty]: Start isEmpty. Operand 894 states and 1088 transitions. [2023-02-18 23:33:42,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-02-18 23:33:42,389 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 23:33:42,389 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] [2023-02-18 23:33:42,409 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-02-18 23:33:42,593 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 [2023-02-18 23:33:42,593 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ackermannErr6ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2023-02-18 23:33:42,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 23:33:42,593 INFO L85 PathProgramCache]: Analyzing trace with hash 1298021223, now seen corresponding path program 1 times [2023-02-18 23:33:42,593 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 23:33:42,594 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [646197197] [2023-02-18 23:33:42,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 23:33:42,594 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 23:33:42,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 23:33:42,625 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-02-18 23:33:42,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 23:33:42,646 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-02-18 23:33:42,646 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 23:33:42,646 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [646197197] [2023-02-18 23:33:42,646 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [646197197] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 23:33:42,646 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [380358452] [2023-02-18 23:33:42,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 23:33:42,647 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 23:33:42,647 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 23:33:42,648 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 23:33:42,649 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-02-18 23:33:42,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 23:33:42,675 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 10 conjunts are in the unsatisfiable core [2023-02-18 23:33:42,690 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 23:33:42,701 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-02-18 23:33:42,701 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 23:33:42,751 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-02-18 23:33:42,752 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [380358452] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 23:33:42,752 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 23:33:42,752 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2023-02-18 23:33:42,752 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [472204615] [2023-02-18 23:33:42,752 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 23:33:42,752 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-02-18 23:33:42,752 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 23:33:42,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-02-18 23:33:42,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2023-02-18 23:33:42,753 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) [2023-02-18 23:33:42,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 23:33:42,881 INFO L93 Difference]: Finished difference Result 1014 states and 1281 transitions. [2023-02-18 23:33:42,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-02-18 23:33:42,881 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 [2023-02-18 23:33:42,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 23:33:42,884 INFO L225 Difference]: With dead ends: 1014 [2023-02-18 23:33:42,884 INFO L226 Difference]: Without dead ends: 1013 [2023-02-18 23:33:42,885 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 [2023-02-18 23:33:42,885 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 [2023-02-18 23:33:42,885 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] [2023-02-18 23:33:42,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1013 states. [2023-02-18 23:33:42,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1013 to 932. [2023-02-18 23:33:42,911 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) [2023-02-18 23:33:42,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 932 states to 932 states and 1132 transitions. [2023-02-18 23:33:42,914 INFO L78 Accepts]: Start accepts. Automaton has 932 states and 1132 transitions. Word has length 27 [2023-02-18 23:33:42,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 23:33:42,914 INFO L495 AbstractCegarLoop]: Abstraction has 932 states and 1132 transitions. [2023-02-18 23:33:42,914 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) [2023-02-18 23:33:42,915 INFO L276 IsEmpty]: Start isEmpty. Operand 932 states and 1132 transitions. [2023-02-18 23:33:42,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2023-02-18 23:33:42,915 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 23:33:42,915 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] [2023-02-18 23:33:42,937 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-02-18 23:33:43,119 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 [2023-02-18 23:33:43,119 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2023-02-18 23:33:43,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 23:33:43,120 INFO L85 PathProgramCache]: Analyzing trace with hash -722353775, now seen corresponding path program 1 times [2023-02-18 23:33:43,120 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 23:33:43,120 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1038311524] [2023-02-18 23:33:43,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 23:33:43,120 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 23:33:43,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 23:33:43,152 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-02-18 23:33:43,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 23:33:43,165 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-02-18 23:33:43,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 23:33:43,180 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-02-18 23:33:43,180 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 23:33:43,181 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1038311524] [2023-02-18 23:33:43,181 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1038311524] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 23:33:43,181 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [812564193] [2023-02-18 23:33:43,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 23:33:43,181 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 23:33:43,181 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 23:33:43,182 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 23:33:43,230 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-02-18 23:33:43,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 23:33:43,255 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 9 conjunts are in the unsatisfiable core [2023-02-18 23:33:43,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 23:33:43,274 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-02-18 23:33:43,275 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 23:33:43,348 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-02-18 23:33:43,348 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [812564193] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 23:33:43,348 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 23:33:43,348 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2023-02-18 23:33:43,348 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [137417806] [2023-02-18 23:33:43,348 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 23:33:43,348 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-02-18 23:33:43,348 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 23:33:43,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-02-18 23:33:43,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2023-02-18 23:33:43,349 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) [2023-02-18 23:33:43,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 23:33:43,655 INFO L93 Difference]: Finished difference Result 1421 states and 2074 transitions. [2023-02-18 23:33:43,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-02-18 23:33:43,655 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 [2023-02-18 23:33:43,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 23:33:43,660 INFO L225 Difference]: With dead ends: 1421 [2023-02-18 23:33:43,660 INFO L226 Difference]: Without dead ends: 1419 [2023-02-18 23:33:43,661 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 62 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=188, Invalid=682, Unknown=0, NotChecked=0, Total=870 [2023-02-18 23:33:43,661 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 [2023-02-18 23:33:43,661 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] [2023-02-18 23:33:43,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1419 states. [2023-02-18 23:33:43,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1419 to 1226. [2023-02-18 23:33:43,707 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) [2023-02-18 23:33:43,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1226 states to 1226 states and 1631 transitions. [2023-02-18 23:33:43,712 INFO L78 Accepts]: Start accepts. Automaton has 1226 states and 1631 transitions. Word has length 34 [2023-02-18 23:33:43,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 23:33:43,713 INFO L495 AbstractCegarLoop]: Abstraction has 1226 states and 1631 transitions. [2023-02-18 23:33:43,714 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) [2023-02-18 23:33:43,714 INFO L276 IsEmpty]: Start isEmpty. Operand 1226 states and 1631 transitions. [2023-02-18 23:33:43,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2023-02-18 23:33:43,714 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 23:33:43,714 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] [2023-02-18 23:33:43,721 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-02-18 23:33:43,919 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 [2023-02-18 23:33:43,919 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ackermannErr6ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2023-02-18 23:33:43,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 23:33:43,919 INFO L85 PathProgramCache]: Analyzing trace with hash 1607744024, now seen corresponding path program 1 times [2023-02-18 23:33:43,919 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 23:33:43,920 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1265503240] [2023-02-18 23:33:43,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 23:33:43,920 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 23:33:43,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 23:33:43,979 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-02-18 23:33:43,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 23:33:43,993 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-02-18 23:33:43,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 23:33:44,008 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 14 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-02-18 23:33:44,008 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 23:33:44,008 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1265503240] [2023-02-18 23:33:44,008 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1265503240] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 23:33:44,008 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1065971724] [2023-02-18 23:33:44,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 23:33:44,009 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 23:33:44,009 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 23:33:44,010 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 23:33:44,012 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-02-18 23:33:44,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 23:33:44,040 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 9 conjunts are in the unsatisfiable core [2023-02-18 23:33:44,041 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 23:33:44,065 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 12 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-02-18 23:33:44,065 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 23:33:44,124 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-02-18 23:33:44,124 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1065971724] provided 1 perfect and 1 imperfect interpolant sequences [2023-02-18 23:33:44,124 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-02-18 23:33:44,124 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8, 8] total 17 [2023-02-18 23:33:44,125 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1083670069] [2023-02-18 23:33:44,125 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 23:33:44,125 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-02-18 23:33:44,125 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 23:33:44,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-02-18 23:33:44,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2023-02-18 23:33:44,126 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) [2023-02-18 23:33:44,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 23:33:44,311 INFO L93 Difference]: Finished difference Result 1333 states and 1854 transitions. [2023-02-18 23:33:44,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-02-18 23:33:44,312 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 [2023-02-18 23:33:44,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 23:33:44,317 INFO L225 Difference]: With dead ends: 1333 [2023-02-18 23:33:44,317 INFO L226 Difference]: Without dead ends: 1332 [2023-02-18 23:33:44,318 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 [2023-02-18 23:33:44,318 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 [2023-02-18 23:33:44,318 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] [2023-02-18 23:33:44,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1332 states. [2023-02-18 23:33:44,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1332 to 1234. [2023-02-18 23:33:44,373 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) [2023-02-18 23:33:44,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1234 states to 1234 states and 1564 transitions. [2023-02-18 23:33:44,377 INFO L78 Accepts]: Start accepts. Automaton has 1234 states and 1564 transitions. Word has length 36 [2023-02-18 23:33:44,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 23:33:44,377 INFO L495 AbstractCegarLoop]: Abstraction has 1234 states and 1564 transitions. [2023-02-18 23:33:44,377 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) [2023-02-18 23:33:44,378 INFO L276 IsEmpty]: Start isEmpty. Operand 1234 states and 1564 transitions. [2023-02-18 23:33:44,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-02-18 23:33:44,378 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 23:33:44,379 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] [2023-02-18 23:33:44,385 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-02-18 23:33:44,583 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 [2023-02-18 23:33:44,583 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ackermannErr6ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2023-02-18 23:33:44,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 23:33:44,584 INFO L85 PathProgramCache]: Analyzing trace with hash -1310665197, now seen corresponding path program 2 times [2023-02-18 23:33:44,584 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 23:33:44,584 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [683220715] [2023-02-18 23:33:44,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 23:33:44,584 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 23:33:44,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 23:33:44,636 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2023-02-18 23:33:44,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 23:33:44,667 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 2 proven. 40 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-02-18 23:33:44,667 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 23:33:44,668 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [683220715] [2023-02-18 23:33:44,668 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [683220715] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 23:33:44,668 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [682880995] [2023-02-18 23:33:44,668 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-18 23:33:44,668 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 23:33:44,668 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 23:33:44,669 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 23:33:44,692 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-02-18 23:33:44,730 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-18 23:33:44,730 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 23:33:44,731 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 14 conjunts are in the unsatisfiable core [2023-02-18 23:33:44,732 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 23:33:44,762 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 2 proven. 40 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-02-18 23:33:44,762 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 23:33:44,827 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 4 proven. 38 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-02-18 23:33:44,827 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [682880995] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 23:33:44,827 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 23:33:44,827 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 22 [2023-02-18 23:33:44,828 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1737871566] [2023-02-18 23:33:44,828 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 23:33:44,828 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-02-18 23:33:44,828 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 23:33:44,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-02-18 23:33:44,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2023-02-18 23:33:44,829 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) [2023-02-18 23:33:45,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 23:33:45,155 INFO L93 Difference]: Finished difference Result 1514 states and 1957 transitions. [2023-02-18 23:33:45,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-02-18 23:33:45,155 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 [2023-02-18 23:33:45,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 23:33:45,160 INFO L225 Difference]: With dead ends: 1514 [2023-02-18 23:33:45,160 INFO L226 Difference]: Without dead ends: 1513 [2023-02-18 23:33:45,161 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 [2023-02-18 23:33:45,161 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 382 mSDsluCounter, 187 mSDsCounter, 0 mSdLazyCounter, 329 mSolverCounterSat, 136 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s 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 [2023-02-18 23:33:45,161 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] [2023-02-18 23:33:45,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1513 states. [2023-02-18 23:33:45,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1513 to 1270. [2023-02-18 23:33:45,206 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) [2023-02-18 23:33:45,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1270 states to 1270 states and 1605 transitions. [2023-02-18 23:33:45,211 INFO L78 Accepts]: Start accepts. Automaton has 1270 states and 1605 transitions. Word has length 43 [2023-02-18 23:33:45,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 23:33:45,211 INFO L495 AbstractCegarLoop]: Abstraction has 1270 states and 1605 transitions. [2023-02-18 23:33:45,211 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) [2023-02-18 23:33:45,211 INFO L276 IsEmpty]: Start isEmpty. Operand 1270 states and 1605 transitions. [2023-02-18 23:33:45,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2023-02-18 23:33:45,212 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 23:33:45,212 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] [2023-02-18 23:33:45,217 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-02-18 23:33:45,417 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 [2023-02-18 23:33:45,418 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ackermannErr6ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2023-02-18 23:33:45,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 23:33:45,418 INFO L85 PathProgramCache]: Analyzing trace with hash -1058043410, now seen corresponding path program 2 times [2023-02-18 23:33:45,418 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 23:33:45,418 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1356609018] [2023-02-18 23:33:45,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 23:33:45,419 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 23:33:45,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 23:33:45,457 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-02-18 23:33:45,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 23:33:45,472 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-02-18 23:33:45,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 23:33:45,492 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 26 proven. 8 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-02-18 23:33:45,493 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 23:33:45,493 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1356609018] [2023-02-18 23:33:45,493 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1356609018] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 23:33:45,493 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1573343279] [2023-02-18 23:33:45,493 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-18 23:33:45,493 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 23:33:45,494 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 23:33:45,500 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 23:33:45,518 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-02-18 23:33:45,548 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-18 23:33:45,548 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 23:33:45,549 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 11 conjunts are in the unsatisfiable core [2023-02-18 23:33:45,550 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 23:33:45,585 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 24 proven. 10 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-02-18 23:33:45,586 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 23:33:45,663 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 28 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-02-18 23:33:45,664 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1573343279] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 23:33:45,664 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 23:33:45,664 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 21 [2023-02-18 23:33:45,664 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1550501447] [2023-02-18 23:33:45,664 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 23:33:45,682 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-02-18 23:33:45,682 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 23:33:45,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-02-18 23:33:45,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2023-02-18 23:33:45,683 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) [2023-02-18 23:33:46,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 23:33:46,310 INFO L93 Difference]: Finished difference Result 2781 states and 4049 transitions. [2023-02-18 23:33:46,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-02-18 23:33:46,311 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 [2023-02-18 23:33:46,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 23:33:46,319 INFO L225 Difference]: With dead ends: 2781 [2023-02-18 23:33:46,320 INFO L226 Difference]: Without dead ends: 1922 [2023-02-18 23:33:46,325 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 78 SyntacticMatches, 8 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 499 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=582, Invalid=1968, Unknown=0, NotChecked=0, Total=2550 [2023-02-18 23:33:46,326 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 289 mSDsluCounter, 203 mSDsCounter, 0 mSdLazyCounter, 499 mSolverCounterSat, 375 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 289 SdHoareTripleChecker+Valid, 239 SdHoareTripleChecker+Invalid, 874 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 375 IncrementalHoareTripleChecker+Valid, 499 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-18 23:33:46,326 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [289 Valid, 239 Invalid, 874 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [375 Valid, 499 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-18 23:33:46,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1922 states. [2023-02-18 23:33:46,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1922 to 1449. [2023-02-18 23:33:46,408 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) [2023-02-18 23:33:46,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1449 states to 1449 states and 1815 transitions. [2023-02-18 23:33:46,412 INFO L78 Accepts]: Start accepts. Automaton has 1449 states and 1815 transitions. Word has length 44 [2023-02-18 23:33:46,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 23:33:46,413 INFO L495 AbstractCegarLoop]: Abstraction has 1449 states and 1815 transitions. [2023-02-18 23:33:46,413 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) [2023-02-18 23:33:46,413 INFO L276 IsEmpty]: Start isEmpty. Operand 1449 states and 1815 transitions. [2023-02-18 23:33:46,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2023-02-18 23:33:46,415 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 23:33:46,415 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] [2023-02-18 23:33:46,434 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-02-18 23:33:46,633 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 [2023-02-18 23:33:46,634 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ackermannErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2023-02-18 23:33:46,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 23:33:46,634 INFO L85 PathProgramCache]: Analyzing trace with hash 407823314, now seen corresponding path program 1 times [2023-02-18 23:33:46,634 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 23:33:46,634 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1967473340] [2023-02-18 23:33:46,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 23:33:46,634 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 23:33:46,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 23:33:46,699 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2023-02-18 23:33:46,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 23:33:46,709 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 38 proven. 5 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-02-18 23:33:46,709 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 23:33:46,710 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1967473340] [2023-02-18 23:33:46,710 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1967473340] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 23:33:46,710 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1352789441] [2023-02-18 23:33:46,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 23:33:46,710 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 23:33:46,710 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 23:33:46,723 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 23:33:46,725 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-02-18 23:33:46,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 23:33:46,774 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 9 conjunts are in the unsatisfiable core [2023-02-18 23:33:46,776 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 23:33:46,807 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 52 proven. 3 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-02-18 23:33:46,807 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 23:33:46,858 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 53 proven. 2 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-02-18 23:33:46,859 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1352789441] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 23:33:46,859 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 23:33:46,859 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 16 [2023-02-18 23:33:46,859 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2020041414] [2023-02-18 23:33:46,859 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 23:33:46,860 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-02-18 23:33:46,860 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 23:33:46,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-02-18 23:33:46,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2023-02-18 23:33:46,861 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) [2023-02-18 23:33:47,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 23:33:47,208 INFO L93 Difference]: Finished difference Result 1875 states and 2461 transitions. [2023-02-18 23:33:47,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-02-18 23:33:47,208 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 [2023-02-18 23:33:47,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 23:33:47,214 INFO L225 Difference]: With dead ends: 1875 [2023-02-18 23:33:47,214 INFO L226 Difference]: Without dead ends: 1807 [2023-02-18 23:33:47,215 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 89 SyntacticMatches, 7 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 246 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=334, Invalid=926, Unknown=0, NotChecked=0, Total=1260 [2023-02-18 23:33:47,216 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 [2023-02-18 23:33:47,216 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] [2023-02-18 23:33:47,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1807 states. [2023-02-18 23:33:47,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1807 to 1391. [2023-02-18 23:33:47,286 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) [2023-02-18 23:33:47,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1391 states to 1391 states and 1742 transitions. [2023-02-18 23:33:47,290 INFO L78 Accepts]: Start accepts. Automaton has 1391 states and 1742 transitions. Word has length 51 [2023-02-18 23:33:47,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 23:33:47,291 INFO L495 AbstractCegarLoop]: Abstraction has 1391 states and 1742 transitions. [2023-02-18 23:33:47,291 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) [2023-02-18 23:33:47,291 INFO L276 IsEmpty]: Start isEmpty. Operand 1391 states and 1742 transitions. [2023-02-18 23:33:47,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2023-02-18 23:33:47,292 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 23:33:47,292 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] [2023-02-18 23:33:47,305 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-02-18 23:33:47,497 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 [2023-02-18 23:33:47,497 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2023-02-18 23:33:47,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 23:33:47,497 INFO L85 PathProgramCache]: Analyzing trace with hash 843839239, now seen corresponding path program 1 times [2023-02-18 23:33:47,498 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 23:33:47,498 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [867500092] [2023-02-18 23:33:47,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 23:33:47,498 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 23:33:47,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 23:33:47,550 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-02-18 23:33:47,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 23:33:47,575 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-02-18 23:33:47,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 23:33:47,589 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-02-18 23:33:47,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 23:33:47,604 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2023-02-18 23:33:47,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 23:33:47,621 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 21 proven. 16 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-02-18 23:33:47,622 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 23:33:47,622 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [867500092] [2023-02-18 23:33:47,622 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [867500092] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 23:33:47,622 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [150045995] [2023-02-18 23:33:47,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 23:33:47,622 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 23:33:47,622 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 23:33:47,623 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) [2023-02-18 23:33:47,649 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-02-18 23:33:47,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 23:33:47,682 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 15 conjunts are in the unsatisfiable core [2023-02-18 23:33:47,683 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 23:33:47,720 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 14 proven. 18 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2023-02-18 23:33:47,721 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 23:33:47,846 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 18 proven. 19 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-02-18 23:33:47,847 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [150045995] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 23:33:47,847 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 23:33:47,847 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 13] total 26 [2023-02-18 23:33:47,847 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1362890703] [2023-02-18 23:33:47,847 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 23:33:47,848 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-02-18 23:33:47,848 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 23:33:47,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-02-18 23:33:47,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=614, Unknown=0, NotChecked=0, Total=702 [2023-02-18 23:33:47,848 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) [2023-02-18 23:33:48,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 23:33:48,660 INFO L93 Difference]: Finished difference Result 3378 states and 5999 transitions. [2023-02-18 23:33:48,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2023-02-18 23:33:48,661 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 [2023-02-18 23:33:48,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 23:33:48,679 INFO L225 Difference]: With dead ends: 3378 [2023-02-18 23:33:48,679 INFO L226 Difference]: Without dead ends: 3376 [2023-02-18 23:33:48,683 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 95 SyntacticMatches, 6 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1696 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=1154, Invalid=5008, Unknown=0, NotChecked=0, Total=6162 [2023-02-18 23:33:48,684 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 [2023-02-18 23:33:48,684 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] [2023-02-18 23:33:48,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3376 states. [2023-02-18 23:33:48,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3376 to 2468. [2023-02-18 23:33:48,843 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) [2023-02-18 23:33:48,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2468 states to 2468 states and 4824 transitions. [2023-02-18 23:33:48,857 INFO L78 Accepts]: Start accepts. Automaton has 2468 states and 4824 transitions. Word has length 53 [2023-02-18 23:33:48,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 23:33:48,857 INFO L495 AbstractCegarLoop]: Abstraction has 2468 states and 4824 transitions. [2023-02-18 23:33:48,857 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) [2023-02-18 23:33:48,857 INFO L276 IsEmpty]: Start isEmpty. Operand 2468 states and 4824 transitions. [2023-02-18 23:33:48,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2023-02-18 23:33:48,859 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 23:33:48,860 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1] [2023-02-18 23:33:48,866 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-02-18 23:33:49,064 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 [2023-02-18 23:33:49,064 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ackermannErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2023-02-18 23:33:49,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 23:33:49,065 INFO L85 PathProgramCache]: Analyzing trace with hash 2013961680, now seen corresponding path program 1 times [2023-02-18 23:33:49,065 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 23:33:49,065 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1754399015] [2023-02-18 23:33:49,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 23:33:49,066 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 23:33:49,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 23:33:49,168 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 111 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-02-18 23:33:49,168 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 23:33:49,168 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1754399015] [2023-02-18 23:33:49,168 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1754399015] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 23:33:49,168 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2105459132] [2023-02-18 23:33:49,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 23:33:49,168 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 23:33:49,169 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 23:33:49,170 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) [2023-02-18 23:33:49,193 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-02-18 23:33:49,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 23:33:49,223 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 18 conjunts are in the unsatisfiable core [2023-02-18 23:33:49,225 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 23:33:49,288 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 111 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-02-18 23:33:49,288 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 23:33:49,400 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 111 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-02-18 23:33:49,400 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2105459132] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 23:33:49,400 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 23:33:49,401 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 23 [2023-02-18 23:33:49,401 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [209937137] [2023-02-18 23:33:49,401 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 23:33:49,401 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-02-18 23:33:49,401 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 23:33:49,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-02-18 23:33:49,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=416, Unknown=0, NotChecked=0, Total=552 [2023-02-18 23:33:49,402 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) [2023-02-18 23:33:50,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 23:33:50,072 INFO L93 Difference]: Finished difference Result 7290 states and 13932 transitions. [2023-02-18 23:33:50,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2023-02-18 23:33:50,073 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 [2023-02-18 23:33:50,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 23:33:50,110 INFO L225 Difference]: With dead ends: 7290 [2023-02-18 23:33:50,111 INFO L226 Difference]: Without dead ends: 7289 [2023-02-18 23:33:50,115 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 [2023-02-18 23:33:50,115 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 [2023-02-18 23:33:50,116 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] [2023-02-18 23:33:50,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7289 states. [2023-02-18 23:33:50,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7289 to 6716. [2023-02-18 23:33:50,581 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) [2023-02-18 23:33:50,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6716 states to 6716 states and 13014 transitions. [2023-02-18 23:33:50,630 INFO L78 Accepts]: Start accepts. Automaton has 6716 states and 13014 transitions. Word has length 57 [2023-02-18 23:33:50,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 23:33:50,630 INFO L495 AbstractCegarLoop]: Abstraction has 6716 states and 13014 transitions. [2023-02-18 23:33:50,630 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) [2023-02-18 23:33:50,630 INFO L276 IsEmpty]: Start isEmpty. Operand 6716 states and 13014 transitions. [2023-02-18 23:33:50,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2023-02-18 23:33:50,632 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 23:33:50,633 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] [2023-02-18 23:33:50,649 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2023-02-18 23:33:50,837 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 [2023-02-18 23:33:50,837 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ackermannErr6ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2023-02-18 23:33:50,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 23:33:50,838 INFO L85 PathProgramCache]: Analyzing trace with hash -814290418, now seen corresponding path program 1 times [2023-02-18 23:33:50,838 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 23:33:50,838 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1644795315] [2023-02-18 23:33:50,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 23:33:50,838 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 23:33:50,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 23:33:50,882 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-02-18 23:33:50,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 23:33:50,925 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-02-18 23:33:50,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 23:33:50,944 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-02-18 23:33:50,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 23:33:50,960 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2023-02-18 23:33:50,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 23:33:50,980 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 36 proven. 6 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-02-18 23:33:50,980 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 23:33:50,980 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1644795315] [2023-02-18 23:33:50,980 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1644795315] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 23:33:50,980 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [703095640] [2023-02-18 23:33:50,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 23:33:50,981 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 23:33:50,981 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 23:33:50,982 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) [2023-02-18 23:33:51,000 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-02-18 23:33:51,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 23:33:51,051 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 15 conjunts are in the unsatisfiable core [2023-02-18 23:33:51,052 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 23:33:51,091 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 27 proven. 10 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2023-02-18 23:33:51,091 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 23:33:51,238 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 40 proven. 2 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-02-18 23:33:51,239 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [703095640] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 23:33:51,239 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 23:33:51,239 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 13] total 26 [2023-02-18 23:33:51,239 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1416469752] [2023-02-18 23:33:51,239 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 23:33:51,240 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-02-18 23:33:51,240 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 23:33:51,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-02-18 23:33:51,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=608, Unknown=0, NotChecked=0, Total=702 [2023-02-18 23:33:51,242 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) [2023-02-18 23:33:53,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 23:33:53,001 INFO L93 Difference]: Finished difference Result 24355 states and 82409 transitions. [2023-02-18 23:33:53,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2023-02-18 23:33:53,002 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 [2023-02-18 23:33:53,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 23:33:53,299 INFO L225 Difference]: With dead ends: 24355 [2023-02-18 23:33:53,299 INFO L226 Difference]: Without dead ends: 18094 [2023-02-18 23:33:53,380 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 [2023-02-18 23:33:53,381 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 132 mSDsluCounter, 278 mSDsCounter, 0 mSdLazyCounter, 749 mSolverCounterSat, 224 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 314 SdHoareTripleChecker+Invalid, 973 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 224 IncrementalHoareTripleChecker+Valid, 749 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-02-18 23:33:53,381 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [132 Valid, 314 Invalid, 973 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [224 Valid, 749 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-02-18 23:33:53,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18094 states. [2023-02-18 23:33:54,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18094 to 14204. [2023-02-18 23:33:54,655 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) [2023-02-18 23:33:54,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14204 states to 14204 states and 49096 transitions. [2023-02-18 23:33:54,882 INFO L78 Accepts]: Start accepts. Automaton has 14204 states and 49096 transitions. Word has length 55 [2023-02-18 23:33:54,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 23:33:54,882 INFO L495 AbstractCegarLoop]: Abstraction has 14204 states and 49096 transitions. [2023-02-18 23:33:54,882 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) [2023-02-18 23:33:54,882 INFO L276 IsEmpty]: Start isEmpty. Operand 14204 states and 49096 transitions. [2023-02-18 23:33:54,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2023-02-18 23:33:54,888 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 23:33:54,888 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1] [2023-02-18 23:33:54,894 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-02-18 23:33:55,092 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 [2023-02-18 23:33:55,092 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ackermannErr6ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2023-02-18 23:33:55,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 23:33:55,093 INFO L85 PathProgramCache]: Analyzing trace with hash 1321083776, now seen corresponding path program 2 times [2023-02-18 23:33:55,093 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 23:33:55,093 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [790335407] [2023-02-18 23:33:55,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 23:33:55,094 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 23:33:55,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 23:33:55,221 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 23:33:55,222 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 23:33:55,222 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [790335407] [2023-02-18 23:33:55,222 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [790335407] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 23:33:55,222 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [745168795] [2023-02-18 23:33:55,222 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-18 23:33:55,222 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 23:33:55,223 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 23:33:55,223 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) [2023-02-18 23:33:55,288 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-02-18 23:33:55,302 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-18 23:33:55,303 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 23:33:55,303 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 16 conjunts are in the unsatisfiable core [2023-02-18 23:33:55,304 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 23:33:55,563 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 23:33:55,563 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 23:33:55,716 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 23:33:55,716 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [745168795] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 23:33:55,716 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 23:33:55,716 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 31 [2023-02-18 23:33:55,716 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1465941026] [2023-02-18 23:33:55,716 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 23:33:55,717 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-02-18 23:33:55,717 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 23:33:55,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-02-18 23:33:55,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=244, Invalid=748, Unknown=0, NotChecked=0, Total=992 [2023-02-18 23:33:55,718 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) [2023-02-18 23:33:57,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 23:33:57,278 INFO L93 Difference]: Finished difference Result 22005 states and 73240 transitions. [2023-02-18 23:33:57,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2023-02-18 23:33:57,278 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 [2023-02-18 23:33:57,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 23:33:57,526 INFO L225 Difference]: With dead ends: 22005 [2023-02-18 23:33:57,527 INFO L226 Difference]: Without dead ends: 22004 [2023-02-18 23:33:57,538 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 90 SyntacticMatches, 12 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 795 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1054, Invalid=2368, Unknown=0, NotChecked=0, Total=3422 [2023-02-18 23:33:57,539 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 [2023-02-18 23:33:57,539 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] [2023-02-18 23:33:57,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22004 states. [2023-02-18 23:33:59,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22004 to 20834. [2023-02-18 23:33:59,258 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) [2023-02-18 23:33:59,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20834 states to 20834 states and 70543 transitions. [2023-02-18 23:33:59,481 INFO L78 Accepts]: Start accepts. Automaton has 20834 states and 70543 transitions. Word has length 59 [2023-02-18 23:33:59,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 23:33:59,481 INFO L495 AbstractCegarLoop]: Abstraction has 20834 states and 70543 transitions. [2023-02-18 23:33:59,482 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) [2023-02-18 23:33:59,482 INFO L276 IsEmpty]: Start isEmpty. Operand 20834 states and 70543 transitions. [2023-02-18 23:33:59,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2023-02-18 23:33:59,484 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 23:33:59,485 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] [2023-02-18 23:33:59,501 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-02-18 23:33:59,689 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 [2023-02-18 23:33:59,689 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ackermannErr6ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2023-02-18 23:33:59,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 23:33:59,690 INFO L85 PathProgramCache]: Analyzing trace with hash -1343121217, now seen corresponding path program 3 times [2023-02-18 23:33:59,690 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 23:33:59,690 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [51766153] [2023-02-18 23:33:59,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 23:33:59,690 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 23:33:59,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 23:33:59,790 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2023-02-18 23:33:59,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 23:33:59,810 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 3 proven. 111 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-02-18 23:33:59,811 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 23:33:59,811 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [51766153] [2023-02-18 23:33:59,811 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [51766153] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 23:33:59,811 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1346772594] [2023-02-18 23:33:59,811 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-18 23:33:59,811 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 23:33:59,811 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 23:33:59,837 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) [2023-02-18 23:33:59,865 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-02-18 23:33:59,881 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2023-02-18 23:33:59,881 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 23:33:59,882 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 7 conjunts are in the unsatisfiable core [2023-02-18 23:33:59,883 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 23:33:59,908 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 87 proven. 0 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2023-02-18 23:33:59,908 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-18 23:33:59,908 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1346772594] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 23:33:59,908 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-02-18 23:33:59,908 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [15] total 19 [2023-02-18 23:33:59,908 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [603634018] [2023-02-18 23:33:59,909 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 23:33:59,909 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-18 23:33:59,909 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 23:33:59,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-18 23:33:59,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2023-02-18 23:33:59,910 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) [2023-02-18 23:34:00,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 23:34:00,939 INFO L93 Difference]: Finished difference Result 20917 states and 71959 transitions. [2023-02-18 23:34:00,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-02-18 23:34:00,940 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 [2023-02-18 23:34:00,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 23:34:01,158 INFO L225 Difference]: With dead ends: 20917 [2023-02-18 23:34:01,158 INFO L226 Difference]: Without dead ends: 18654 [2023-02-18 23:34:01,341 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 [2023-02-18 23:34:01,342 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 [2023-02-18 23:34:01,343 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] [2023-02-18 23:34:01,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18654 states. [2023-02-18 23:34:02,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18654 to 18540. [2023-02-18 23:34:02,820 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) [2023-02-18 23:34:03,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18540 states to 18540 states and 67784 transitions. [2023-02-18 23:34:03,236 INFO L78 Accepts]: Start accepts. Automaton has 18540 states and 67784 transitions. Word has length 59 [2023-02-18 23:34:03,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 23:34:03,237 INFO L495 AbstractCegarLoop]: Abstraction has 18540 states and 67784 transitions. [2023-02-18 23:34:03,237 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) [2023-02-18 23:34:03,237 INFO L276 IsEmpty]: Start isEmpty. Operand 18540 states and 67784 transitions. [2023-02-18 23:34:03,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2023-02-18 23:34:03,239 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 23:34:03,239 INFO L195 NwaCegarLoop]: trace histogram [9, 7, 5, 5, 5, 5, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 23:34:03,261 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-02-18 23:34:03,443 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 [2023-02-18 23:34:03,444 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ackermannErr6ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2023-02-18 23:34:03,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 23:34:03,444 INFO L85 PathProgramCache]: Analyzing trace with hash -1727955375, now seen corresponding path program 2 times [2023-02-18 23:34:03,445 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 23:34:03,445 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [555963068] [2023-02-18 23:34:03,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 23:34:03,446 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 23:34:03,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 23:34:03,553 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2023-02-18 23:34:03,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 23:34:03,582 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-02-18 23:34:03,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 23:34:03,610 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-02-18 23:34:03,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 23:34:03,626 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-02-18 23:34:03,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 23:34:03,644 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2023-02-18 23:34:03,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 23:34:03,665 INFO L134 CoverageAnalysis]: Checked inductivity of 163 backedges. 86 proven. 16 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2023-02-18 23:34:03,665 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 23:34:03,665 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [555963068] [2023-02-18 23:34:03,665 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [555963068] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 23:34:03,665 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1123608266] [2023-02-18 23:34:03,666 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-18 23:34:03,666 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 23:34:03,666 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 23:34:03,694 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) [2023-02-18 23:34:03,696 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-02-18 23:34:03,743 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-18 23:34:03,743 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 23:34:03,744 INFO L263 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 19 conjunts are in the unsatisfiable core [2023-02-18 23:34:03,745 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 23:34:03,819 INFO L134 CoverageAnalysis]: Checked inductivity of 163 backedges. 75 proven. 22 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2023-02-18 23:34:03,820 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 23:34:04,027 INFO L134 CoverageAnalysis]: Checked inductivity of 163 backedges. 94 proven. 8 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2023-02-18 23:34:04,028 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1123608266] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 23:34:04,028 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 23:34:04,028 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 16] total 32 [2023-02-18 23:34:04,028 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [217407573] [2023-02-18 23:34:04,028 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 23:34:04,029 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-02-18 23:34:04,029 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 23:34:04,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-02-18 23:34:04,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=930, Unknown=0, NotChecked=0, Total=1056 [2023-02-18 23:34:04,030 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) [2023-02-18 23:34:05,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 23:34:05,569 INFO L93 Difference]: Finished difference Result 28970 states and 107394 transitions. [2023-02-18 23:34:05,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-02-18 23:34:05,571 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 80 [2023-02-18 23:34:05,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 23:34:05,623 INFO L225 Difference]: With dead ends: 28970 [2023-02-18 23:34:05,623 INFO L226 Difference]: Without dead ends: 10960 [2023-02-18 23:34:05,820 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 142 SyntacticMatches, 14 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 559 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=667, Invalid=2639, Unknown=0, NotChecked=0, Total=3306 [2023-02-18 23:34:05,820 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 226 mSDsluCounter, 347 mSDsCounter, 0 mSdLazyCounter, 768 mSolverCounterSat, 187 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 226 SdHoareTripleChecker+Valid, 384 SdHoareTripleChecker+Invalid, 955 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 187 IncrementalHoareTripleChecker+Valid, 768 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-18 23:34:05,820 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [226 Valid, 384 Invalid, 955 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [187 Valid, 768 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-18 23:34:05,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10960 states. [2023-02-18 23:34:06,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10960 to 10392. [2023-02-18 23:34:06,421 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) [2023-02-18 23:34:06,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10392 states to 10392 states and 16286 transitions. [2023-02-18 23:34:06,555 INFO L78 Accepts]: Start accepts. Automaton has 10392 states and 16286 transitions. Word has length 80 [2023-02-18 23:34:06,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 23:34:06,555 INFO L495 AbstractCegarLoop]: Abstraction has 10392 states and 16286 transitions. [2023-02-18 23:34:06,555 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) [2023-02-18 23:34:06,555 INFO L276 IsEmpty]: Start isEmpty. Operand 10392 states and 16286 transitions. [2023-02-18 23:34:06,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2023-02-18 23:34:06,557 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 23:34:06,557 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] [2023-02-18 23:34:06,561 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2023-02-18 23:34:06,761 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 [2023-02-18 23:34:06,762 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ackermannErr6ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2023-02-18 23:34:06,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 23:34:06,762 INFO L85 PathProgramCache]: Analyzing trace with hash 1935422832, now seen corresponding path program 3 times [2023-02-18 23:34:06,762 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 23:34:06,762 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1645974991] [2023-02-18 23:34:06,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 23:34:06,763 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 23:34:06,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 23:34:06,856 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-02-18 23:34:06,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 23:34:06,874 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-02-18 23:34:06,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 23:34:06,893 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 62 proven. 77 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-02-18 23:34:06,893 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 23:34:06,893 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1645974991] [2023-02-18 23:34:06,893 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1645974991] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 23:34:06,893 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [145376023] [2023-02-18 23:34:06,893 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-18 23:34:06,894 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 23:34:06,894 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 23:34:06,909 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) [2023-02-18 23:34:06,910 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-02-18 23:34:06,961 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2023-02-18 23:34:06,961 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 23:34:06,962 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 17 conjunts are in the unsatisfiable core [2023-02-18 23:34:06,963 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 23:34:07,027 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 60 proven. 79 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-02-18 23:34:07,027 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 23:34:07,195 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 64 proven. 75 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-02-18 23:34:07,196 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [145376023] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 23:34:07,196 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 23:34:07,196 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 33 [2023-02-18 23:34:07,196 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [792691657] [2023-02-18 23:34:07,196 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 23:34:07,196 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-02-18 23:34:07,196 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 23:34:07,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-02-18 23:34:07,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=949, Unknown=0, NotChecked=0, Total=1122 [2023-02-18 23:34:07,197 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) [2023-02-18 23:34:07,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 23:34:07,922 INFO L93 Difference]: Finished difference Result 11147 states and 17428 transitions. [2023-02-18 23:34:07,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-02-18 23:34:07,922 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 [2023-02-18 23:34:07,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 23:34:07,950 INFO L225 Difference]: With dead ends: 11147 [2023-02-18 23:34:07,951 INFO L226 Difference]: Without dead ends: 11146 [2023-02-18 23:34:07,954 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 115 SyntacticMatches, 12 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 533 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=573, Invalid=1977, Unknown=0, NotChecked=0, Total=2550 [2023-02-18 23:34:07,955 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 247 mSDsluCounter, 217 mSDsCounter, 0 mSdLazyCounter, 474 mSolverCounterSat, 223 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 247 SdHoareTripleChecker+Valid, 248 SdHoareTripleChecker+Invalid, 697 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 223 IncrementalHoareTripleChecker+Valid, 474 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-18 23:34:07,955 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [247 Valid, 248 Invalid, 697 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [223 Valid, 474 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-18 23:34:07,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11146 states. [2023-02-18 23:34:08,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11146 to 10500. [2023-02-18 23:34:08,423 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) [2023-02-18 23:34:08,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10500 states to 10500 states and 16434 transitions. [2023-02-18 23:34:08,456 INFO L78 Accepts]: Start accepts. Automaton has 10500 states and 16434 transitions. Word has length 68 [2023-02-18 23:34:08,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 23:34:08,457 INFO L495 AbstractCegarLoop]: Abstraction has 10500 states and 16434 transitions. [2023-02-18 23:34:08,457 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) [2023-02-18 23:34:08,457 INFO L276 IsEmpty]: Start isEmpty. Operand 10500 states and 16434 transitions. [2023-02-18 23:34:08,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2023-02-18 23:34:08,460 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 23:34:08,460 INFO L195 NwaCegarLoop]: trace histogram [10, 7, 6, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2023-02-18 23:34:08,482 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-02-18 23:34:08,664 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 [2023-02-18 23:34:08,664 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2023-02-18 23:34:08,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 23:34:08,665 INFO L85 PathProgramCache]: Analyzing trace with hash -2007669540, now seen corresponding path program 2 times [2023-02-18 23:34:08,665 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 23:34:08,665 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1844256971] [2023-02-18 23:34:08,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 23:34:08,665 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 23:34:08,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 23:34:08,702 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2023-02-18 23:34:08,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 23:34:08,724 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-02-18 23:34:08,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 23:34:08,745 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-02-18 23:34:08,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 23:34:08,776 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-02-18 23:34:08,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 23:34:08,793 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-02-18 23:34:08,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 23:34:08,795 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2023-02-18 23:34:08,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 23:34:08,797 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2023-02-18 23:34:08,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 23:34:08,799 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 103 proven. 24 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2023-02-18 23:34:08,799 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 23:34:08,800 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1844256971] [2023-02-18 23:34:08,800 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1844256971] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 23:34:08,800 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1237180712] [2023-02-18 23:34:08,800 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-18 23:34:08,800 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 23:34:08,800 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 23:34:08,801 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) [2023-02-18 23:34:08,845 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-02-18 23:34:08,917 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-18 23:34:08,917 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 23:34:08,918 INFO L263 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 7 conjunts are in the unsatisfiable core [2023-02-18 23:34:08,919 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 23:34:08,934 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 103 proven. 15 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2023-02-18 23:34:08,934 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 23:34:08,987 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 103 proven. 26 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2023-02-18 23:34:08,988 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1237180712] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 23:34:08,988 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 23:34:08,988 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 8] total 13 [2023-02-18 23:34:08,988 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [405298383] [2023-02-18 23:34:08,988 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 23:34:08,989 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-02-18 23:34:08,989 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 23:34:08,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-02-18 23:34:08,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2023-02-18 23:34:08,989 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) [2023-02-18 23:34:09,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 23:34:09,501 INFO L93 Difference]: Finished difference Result 21289 states and 37508 transitions. [2023-02-18 23:34:09,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-02-18 23:34:09,501 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 89 [2023-02-18 23:34:09,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 23:34:09,537 INFO L225 Difference]: With dead ends: 21289 [2023-02-18 23:34:09,538 INFO L226 Difference]: Without dead ends: 11684 [2023-02-18 23:34:09,573 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 180 SyntacticMatches, 8 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=102, Invalid=204, Unknown=0, NotChecked=0, Total=306 [2023-02-18 23:34:09,574 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 82 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 134 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-18 23:34:09,577 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [84 Valid, 81 Invalid, 134 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 23:34:09,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11684 states. [2023-02-18 23:34:10,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11684 to 10494. [2023-02-18 23:34:10,059 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) [2023-02-18 23:34:10,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10494 states to 10494 states and 16348 transitions. [2023-02-18 23:34:10,101 INFO L78 Accepts]: Start accepts. Automaton has 10494 states and 16348 transitions. Word has length 89 [2023-02-18 23:34:10,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 23:34:10,101 INFO L495 AbstractCegarLoop]: Abstraction has 10494 states and 16348 transitions. [2023-02-18 23:34:10,102 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) [2023-02-18 23:34:10,102 INFO L276 IsEmpty]: Start isEmpty. Operand 10494 states and 16348 transitions. [2023-02-18 23:34:10,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2023-02-18 23:34:10,105 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 23:34:10,106 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] [2023-02-18 23:34:10,127 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2023-02-18 23:34:10,325 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 [2023-02-18 23:34:10,325 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2023-02-18 23:34:10,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 23:34:10,326 INFO L85 PathProgramCache]: Analyzing trace with hash -1307053986, now seen corresponding path program 3 times [2023-02-18 23:34:10,326 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 23:34:10,326 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1027700247] [2023-02-18 23:34:10,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 23:34:10,326 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 23:34:10,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 23:34:10,375 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-02-18 23:34:10,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 23:34:10,421 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-02-18 23:34:10,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 23:34:10,451 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-02-18 23:34:10,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 23:34:10,479 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-02-18 23:34:10,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 23:34:10,508 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-02-18 23:34:10,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 23:34:10,525 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-02-18 23:34:10,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 23:34:10,535 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2023-02-18 23:34:10,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 23:34:10,538 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2023-02-18 23:34:10,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 23:34:10,559 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2023-02-18 23:34:10,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 23:34:10,561 INFO L134 CoverageAnalysis]: Checked inductivity of 266 backedges. 117 proven. 45 refuted. 0 times theorem prover too weak. 104 trivial. 0 not checked. [2023-02-18 23:34:10,561 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 23:34:10,562 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1027700247] [2023-02-18 23:34:10,562 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1027700247] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 23:34:10,562 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [161968937] [2023-02-18 23:34:10,562 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-18 23:34:10,562 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 23:34:10,562 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 23:34:10,563 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) [2023-02-18 23:34:10,565 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-02-18 23:34:10,628 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2023-02-18 23:34:10,628 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 23:34:10,629 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 12 conjunts are in the unsatisfiable core [2023-02-18 23:34:10,630 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 23:34:10,662 INFO L134 CoverageAnalysis]: Checked inductivity of 266 backedges. 153 proven. 26 refuted. 0 times theorem prover too weak. 87 trivial. 0 not checked. [2023-02-18 23:34:10,662 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 23:34:10,769 INFO L134 CoverageAnalysis]: Checked inductivity of 266 backedges. 123 proven. 57 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2023-02-18 23:34:10,770 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [161968937] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 23:34:10,770 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 23:34:10,770 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 11] total 16 [2023-02-18 23:34:10,770 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1281590928] [2023-02-18 23:34:10,770 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 23:34:10,771 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-02-18 23:34:10,771 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 23:34:10,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-02-18 23:34:10,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2023-02-18 23:34:10,772 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) [2023-02-18 23:34:11,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 23:34:11,610 INFO L93 Difference]: Finished difference Result 24308 states and 49208 transitions. [2023-02-18 23:34:11,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-02-18 23:34:11,611 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 [2023-02-18 23:34:11,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 23:34:11,680 INFO L225 Difference]: With dead ends: 24308 [2023-02-18 23:34:11,680 INFO L226 Difference]: Without dead ends: 14737 [2023-02-18 23:34:11,740 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 [2023-02-18 23:34:11,741 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 58 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 149 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 194 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 149 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 23:34:11,741 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [65 Valid, 119 Invalid, 194 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 149 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 23:34:11,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14737 states. [2023-02-18 23:34:12,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14737 to 14372. [2023-02-18 23:34:12,552 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) [2023-02-18 23:34:12,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14372 states to 14372 states and 22786 transitions. [2023-02-18 23:34:12,605 INFO L78 Accepts]: Start accepts. Automaton has 14372 states and 22786 transitions. Word has length 100 [2023-02-18 23:34:12,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 23:34:12,605 INFO L495 AbstractCegarLoop]: Abstraction has 14372 states and 22786 transitions. [2023-02-18 23:34:12,605 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) [2023-02-18 23:34:12,606 INFO L276 IsEmpty]: Start isEmpty. Operand 14372 states and 22786 transitions. [2023-02-18 23:34:12,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2023-02-18 23:34:12,610 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 23:34:12,610 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] [2023-02-18 23:34:12,614 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2023-02-18 23:34:12,814 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 [2023-02-18 23:34:12,814 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ackermannErr6ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2023-02-18 23:34:12,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 23:34:12,815 INFO L85 PathProgramCache]: Analyzing trace with hash 1104252262, now seen corresponding path program 3 times [2023-02-18 23:34:12,815 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 23:34:12,815 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1469323110] [2023-02-18 23:34:12,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 23:34:12,815 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 23:34:12,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 23:34:12,942 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-02-18 23:34:12,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 23:34:12,971 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-02-18 23:34:12,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 23:34:12,988 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-02-18 23:34:12,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 23:34:13,009 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2023-02-18 23:34:13,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 23:34:13,031 INFO L134 CoverageAnalysis]: Checked inductivity of 227 backedges. 120 proven. 86 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-02-18 23:34:13,031 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 23:34:13,031 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1469323110] [2023-02-18 23:34:13,032 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1469323110] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 23:34:13,032 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [139511525] [2023-02-18 23:34:13,032 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-18 23:34:13,032 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 23:34:13,032 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 23:34:13,033 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) [2023-02-18 23:34:13,049 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-02-18 23:34:13,118 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2023-02-18 23:34:13,118 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 23:34:13,119 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 31 conjunts are in the unsatisfiable core [2023-02-18 23:34:13,120 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 23:34:13,212 INFO L134 CoverageAnalysis]: Checked inductivity of 227 backedges. 113 proven. 41 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2023-02-18 23:34:13,212 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 23:34:13,257 INFO L134 CoverageAnalysis]: Checked inductivity of 227 backedges. 142 proven. 13 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2023-02-18 23:34:13,258 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [139511525] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 23:34:13,258 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 23:34:13,258 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 7, 8] total 29 [2023-02-18 23:34:13,258 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1222020932] [2023-02-18 23:34:13,258 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 23:34:13,259 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-02-18 23:34:13,259 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 23:34:13,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-02-18 23:34:13,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=723, Unknown=0, NotChecked=0, Total=812 [2023-02-18 23:34:13,260 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) [2023-02-18 23:34:14,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 23:34:14,601 INFO L93 Difference]: Finished difference Result 25330 states and 43230 transitions. [2023-02-18 23:34:14,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2023-02-18 23:34:14,602 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 [2023-02-18 23:34:14,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 23:34:14,683 INFO L225 Difference]: With dead ends: 25330 [2023-02-18 23:34:14,684 INFO L226 Difference]: Without dead ends: 13103 [2023-02-18 23:34:14,762 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 246 GetRequests, 177 SyntacticMatches, 4 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 827 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=983, Invalid=3439, Unknown=0, NotChecked=0, Total=4422 [2023-02-18 23:34:14,762 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 243 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 1059 mSolverCounterSat, 242 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 243 SdHoareTripleChecker+Valid, 153 SdHoareTripleChecker+Invalid, 1301 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 242 IncrementalHoareTripleChecker+Valid, 1059 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-02-18 23:34:14,764 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [243 Valid, 153 Invalid, 1301 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [242 Valid, 1059 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-02-18 23:34:14,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13103 states. [2023-02-18 23:34:15,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13103 to 11143. [2023-02-18 23:34:15,481 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) [2023-02-18 23:34:15,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11143 states to 11143 states and 15399 transitions. [2023-02-18 23:34:15,517 INFO L78 Accepts]: Start accepts. Automaton has 11143 states and 15399 transitions. Word has length 87 [2023-02-18 23:34:15,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 23:34:15,519 INFO L495 AbstractCegarLoop]: Abstraction has 11143 states and 15399 transitions. [2023-02-18 23:34:15,519 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) [2023-02-18 23:34:15,519 INFO L276 IsEmpty]: Start isEmpty. Operand 11143 states and 15399 transitions. [2023-02-18 23:34:15,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2023-02-18 23:34:15,522 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 23:34:15,522 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] [2023-02-18 23:34:15,528 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2023-02-18 23:34:15,726 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 [2023-02-18 23:34:15,726 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2023-02-18 23:34:15,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 23:34:15,727 INFO L85 PathProgramCache]: Analyzing trace with hash 1765664819, now seen corresponding path program 4 times [2023-02-18 23:34:15,727 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 23:34:15,727 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1426068613] [2023-02-18 23:34:15,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 23:34:15,727 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 23:34:15,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 23:34:15,834 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-02-18 23:34:15,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 23:34:15,910 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-02-18 23:34:15,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 23:34:15,960 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-02-18 23:34:15,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 23:34:15,998 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-02-18 23:34:15,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 23:34:16,015 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-02-18 23:34:16,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 23:34:16,033 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2023-02-18 23:34:16,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 23:34:16,054 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2023-02-18 23:34:16,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 23:34:16,061 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2023-02-18 23:34:16,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 23:34:16,068 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 51 proven. 69 refuted. 0 times theorem prover too weak. 101 trivial. 0 not checked. [2023-02-18 23:34:16,068 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 23:34:16,068 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1426068613] [2023-02-18 23:34:16,068 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1426068613] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 23:34:16,068 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2096318696] [2023-02-18 23:34:16,068 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-18 23:34:16,068 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 23:34:16,069 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 23:34:16,070 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) [2023-02-18 23:34:16,093 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-02-18 23:34:16,164 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-18 23:34:16,164 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 23:34:16,165 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 27 conjunts are in the unsatisfiable core [2023-02-18 23:34:16,167 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 23:34:16,244 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 34 proven. 71 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2023-02-18 23:34:16,244 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 23:34:16,598 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 42 proven. 93 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2023-02-18 23:34:16,599 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2096318696] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 23:34:16,599 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 23:34:16,599 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17, 23] total 42 [2023-02-18 23:34:16,599 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [559672924] [2023-02-18 23:34:16,599 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 23:34:16,600 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2023-02-18 23:34:16,600 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 23:34:16,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2023-02-18 23:34:16,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=207, Invalid=1599, Unknown=0, NotChecked=0, Total=1806 [2023-02-18 23:34:16,601 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) [2023-02-18 23:34:19,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 23:34:19,453 INFO L93 Difference]: Finished difference Result 34681 states and 55092 transitions. [2023-02-18 23:34:19,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 143 states. [2023-02-18 23:34:19,453 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 [2023-02-18 23:34:19,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 23:34:19,622 INFO L225 Difference]: With dead ends: 34681 [2023-02-18 23:34:19,623 INFO L226 Difference]: Without dead ends: 33579 [2023-02-18 23:34:19,661 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 356 GetRequests, 165 SyntacticMatches, 12 SemanticMatches, 179 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12337 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=5454, Invalid=27126, Unknown=0, NotChecked=0, Total=32580 [2023-02-18 23:34:19,662 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 343 mSDsluCounter, 265 mSDsCounter, 0 mSdLazyCounter, 1120 mSolverCounterSat, 915 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 354 SdHoareTripleChecker+Valid, 287 SdHoareTripleChecker+Invalid, 2035 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 915 IncrementalHoareTripleChecker+Valid, 1120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-02-18 23:34:19,662 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [354 Valid, 287 Invalid, 2035 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [915 Valid, 1120 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-02-18 23:34:19,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33579 states. [2023-02-18 23:34:21,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33579 to 21093. [2023-02-18 23:34:21,128 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) [2023-02-18 23:34:21,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21093 states to 21093 states and 32809 transitions. [2023-02-18 23:34:21,213 INFO L78 Accepts]: Start accepts. Automaton has 21093 states and 32809 transitions. Word has length 91 [2023-02-18 23:34:21,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 23:34:21,213 INFO L495 AbstractCegarLoop]: Abstraction has 21093 states and 32809 transitions. [2023-02-18 23:34:21,213 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) [2023-02-18 23:34:21,213 INFO L276 IsEmpty]: Start isEmpty. Operand 21093 states and 32809 transitions. [2023-02-18 23:34:21,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2023-02-18 23:34:21,219 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 23:34:21,219 INFO L195 NwaCegarLoop]: trace histogram [15, 15, 15, 15, 15, 14, 14, 14, 1, 1, 1, 1, 1, 1] [2023-02-18 23:34:21,223 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2023-02-18 23:34:21,423 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 [2023-02-18 23:34:21,424 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ackermannErr6ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2023-02-18 23:34:21,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 23:34:21,424 INFO L85 PathProgramCache]: Analyzing trace with hash 1934326320, now seen corresponding path program 3 times [2023-02-18 23:34:21,424 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 23:34:21,425 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1301552267] [2023-02-18 23:34:21,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 23:34:21,425 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 23:34:21,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 23:34:21,857 INFO L134 CoverageAnalysis]: Checked inductivity of 812 backedges. 0 proven. 812 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 23:34:21,857 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 23:34:21,857 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1301552267] [2023-02-18 23:34:21,857 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1301552267] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 23:34:21,857 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [540570842] [2023-02-18 23:34:21,857 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-18 23:34:21,857 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 23:34:21,857 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 23:34:21,861 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) [2023-02-18 23:34:21,880 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-02-18 23:34:21,959 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2023-02-18 23:34:21,959 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 23:34:21,960 INFO L263 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 32 conjunts are in the unsatisfiable core [2023-02-18 23:34:21,962 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 23:34:22,285 INFO L134 CoverageAnalysis]: Checked inductivity of 812 backedges. 0 proven. 812 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 23:34:22,285 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 23:34:22,968 INFO L134 CoverageAnalysis]: Checked inductivity of 812 backedges. 0 proven. 812 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 23:34:22,968 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [540570842] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 23:34:22,968 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 23:34:22,968 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32, 32] total 63 [2023-02-18 23:34:22,969 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [134687028] [2023-02-18 23:34:22,969 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 23:34:22,969 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2023-02-18 23:34:22,969 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 23:34:22,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2023-02-18 23:34:22,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=996, Invalid=3036, Unknown=0, NotChecked=0, Total=4032 [2023-02-18 23:34:22,971 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)