./Ultimate.py --spec ../sv-benchmarks/c/properties/no-overflow.prp --file ../sv-benchmarks/c/recursive/Ackermann04.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version b5317dae Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/recursive/Ackermann04.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Overflow-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! overflow) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 85f83c4bcdce9397140788b204098e14e4fa25f5b66f064340f4aaa544fbb462 --- Real Ultimate output --- This is Ultimate 0.2.2-?-b5317da-m [2023-02-16 03:57:52,912 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-02-16 03:57:52,913 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-02-16 03:57:52,944 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-02-16 03:57:52,945 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-02-16 03:57:52,948 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-02-16 03:57:52,951 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-02-16 03:57:52,953 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-02-16 03:57:52,955 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-02-16 03:57:52,961 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-02-16 03:57:52,963 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-02-16 03:57:52,965 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-02-16 03:57:52,965 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-02-16 03:57:52,969 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-02-16 03:57:52,971 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-02-16 03:57:52,972 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-02-16 03:57:52,973 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-02-16 03:57:52,974 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-02-16 03:57:52,975 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-02-16 03:57:52,981 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-02-16 03:57:52,982 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-02-16 03:57:52,983 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-02-16 03:57:52,984 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-02-16 03:57:52,985 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-02-16 03:57:52,989 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-02-16 03:57:52,989 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-02-16 03:57:52,990 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-02-16 03:57:52,991 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-02-16 03:57:52,991 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-02-16 03:57:52,992 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-02-16 03:57:52,993 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-02-16 03:57:52,993 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-02-16 03:57:52,995 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-02-16 03:57:52,995 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-02-16 03:57:52,996 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-02-16 03:57:52,996 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-02-16 03:57:52,997 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-02-16 03:57:52,997 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-02-16 03:57:52,997 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-02-16 03:57:52,999 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-02-16 03:57:52,999 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-02-16 03:57:53,000 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Overflow-32bit-Automizer_Default.epf [2023-02-16 03:57:53,031 INFO L113 SettingsManager]: Loading preferences was successful [2023-02-16 03:57:53,034 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-02-16 03:57:53,034 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-02-16 03:57:53,035 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-02-16 03:57:53,035 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-02-16 03:57:53,036 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-02-16 03:57:53,036 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-02-16 03:57:53,036 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-02-16 03:57:53,037 INFO L138 SettingsManager]: * Use SBE=true [2023-02-16 03:57:53,037 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-02-16 03:57:53,038 INFO L138 SettingsManager]: * sizeof long=4 [2023-02-16 03:57:53,038 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-02-16 03:57:53,038 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-02-16 03:57:53,038 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-02-16 03:57:53,038 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-02-16 03:57:53,039 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-02-16 03:57:53,039 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-02-16 03:57:53,039 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-02-16 03:57:53,039 INFO L138 SettingsManager]: * Check absence of signed integer overflows=true [2023-02-16 03:57:53,039 INFO L138 SettingsManager]: * sizeof long double=12 [2023-02-16 03:57:53,039 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-02-16 03:57:53,040 INFO L138 SettingsManager]: * Use constant arrays=true [2023-02-16 03:57:53,040 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-02-16 03:57:53,040 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-02-16 03:57:53,040 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-02-16 03:57:53,040 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-02-16 03:57:53,041 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-16 03:57:53,041 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-02-16 03:57:53,041 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-02-16 03:57:53,041 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-02-16 03:57:53,041 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-02-16 03:57:53,042 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-02-16 03:57:53,042 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-02-16 03:57:53,042 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-02-16 03:57:53,042 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-02-16 03:57:53,042 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-02-16 03:57:53,043 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-02-16 03:57:53,043 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 85f83c4bcdce9397140788b204098e14e4fa25f5b66f064340f4aaa544fbb462 [2023-02-16 03:57:53,322 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-02-16 03:57:53,347 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-02-16 03:57:53,349 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-02-16 03:57:53,350 INFO L271 PluginConnector]: Initializing CDTParser... [2023-02-16 03:57:53,350 INFO L275 PluginConnector]: CDTParser initialized [2023-02-16 03:57:53,351 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/recursive/Ackermann04.c [2023-02-16 03:57:54,476 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-02-16 03:57:54,666 INFO L351 CDTParser]: Found 1 translation units. [2023-02-16 03:57:54,666 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursive/Ackermann04.c [2023-02-16 03:57:54,673 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8786b7b08/205c375572784e5b9f434dbd01919780/FLAGf01da2772 [2023-02-16 03:57:54,689 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8786b7b08/205c375572784e5b9f434dbd01919780 [2023-02-16 03:57:54,693 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-02-16 03:57:54,696 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-02-16 03:57:54,697 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-02-16 03:57:54,697 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-02-16 03:57:54,700 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-02-16 03:57:54,701 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.02 03:57:54" (1/1) ... [2023-02-16 03:57:54,704 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@dad4b6f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 03:57:54, skipping insertion in model container [2023-02-16 03:57:54,704 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.02 03:57:54" (1/1) ... [2023-02-16 03:57:54,713 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-02-16 03:57:54,725 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-02-16 03:57:54,863 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursive/Ackermann04.c[1166,1179] [2023-02-16 03:57:54,864 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-16 03:57:54,873 INFO L203 MainTranslator]: Completed pre-run [2023-02-16 03:57:54,893 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursive/Ackermann04.c[1166,1179] [2023-02-16 03:57:54,893 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-16 03:57:54,905 INFO L208 MainTranslator]: Completed translation [2023-02-16 03:57:54,905 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 03:57:54 WrapperNode [2023-02-16 03:57:54,906 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-02-16 03:57:54,907 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-02-16 03:57:54,907 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-02-16 03:57:54,907 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-02-16 03:57:54,913 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 03:57:54" (1/1) ... [2023-02-16 03:57:54,918 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 03:57:54" (1/1) ... [2023-02-16 03:57:54,933 INFO L138 Inliner]: procedures = 13, calls = 11, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 32 [2023-02-16 03:57:54,933 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-02-16 03:57:54,934 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-02-16 03:57:54,934 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-02-16 03:57:54,935 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-02-16 03:57:54,943 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 03:57:54" (1/1) ... [2023-02-16 03:57:54,943 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 03:57:54" (1/1) ... [2023-02-16 03:57:54,953 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 03:57:54" (1/1) ... [2023-02-16 03:57:54,954 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 03:57:54" (1/1) ... [2023-02-16 03:57:54,960 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 03:57:54" (1/1) ... [2023-02-16 03:57:54,963 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 03:57:54" (1/1) ... [2023-02-16 03:57:54,965 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 03:57:54" (1/1) ... [2023-02-16 03:57:54,965 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 03:57:54" (1/1) ... [2023-02-16 03:57:54,967 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-02-16 03:57:54,969 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-02-16 03:57:54,969 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-02-16 03:57:54,970 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-02-16 03:57:54,970 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 03:57:54" (1/1) ... [2023-02-16 03:57:54,975 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-16 03:57:54,984 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 03:57:54,997 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) [2023-02-16 03:57:55,005 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 [2023-02-16 03:57:55,032 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-02-16 03:57:55,033 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-02-16 03:57:55,033 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-02-16 03:57:55,033 INFO L130 BoogieDeclarations]: Found specification of procedure ackermann [2023-02-16 03:57:55,033 INFO L138 BoogieDeclarations]: Found implementation of procedure ackermann [2023-02-16 03:57:55,033 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-02-16 03:57:55,090 INFO L235 CfgBuilder]: Building ICFG [2023-02-16 03:57:55,092 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2023-02-16 03:57:55,266 INFO L276 CfgBuilder]: Performing block encoding [2023-02-16 03:57:55,278 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-02-16 03:57:55,278 INFO L300 CfgBuilder]: Removed 0 assume(true) statements. [2023-02-16 03:57:55,280 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.02 03:57:55 BoogieIcfgContainer [2023-02-16 03:57:55,280 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-02-16 03:57:55,282 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-02-16 03:57:55,282 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-02-16 03:57:55,285 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-02-16 03:57:55,285 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.02 03:57:54" (1/3) ... [2023-02-16 03:57:55,286 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@318697bd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.02 03:57:55, skipping insertion in model container [2023-02-16 03:57:55,286 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 03:57:54" (2/3) ... [2023-02-16 03:57:55,286 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@318697bd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.02 03:57:55, skipping insertion in model container [2023-02-16 03:57:55,286 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.02 03:57:55" (3/3) ... [2023-02-16 03:57:55,288 INFO L112 eAbstractionObserver]: Analyzing ICFG Ackermann04.c [2023-02-16 03:57:55,319 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-02-16 03:57:55,319 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 8 error locations. [2023-02-16 03:57:55,388 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-02-16 03:57:55,395 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;@1485a76, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-02-16 03:57:55,395 INFO L358 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2023-02-16 03:57:55,399 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) [2023-02-16 03:57:55,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-02-16 03:57:55,408 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 03:57:55,408 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 03:57:55,410 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2023-02-16 03:57:55,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 03:57:55,416 INFO L85 PathProgramCache]: Analyzing trace with hash 180762217, now seen corresponding path program 1 times [2023-02-16 03:57:55,423 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 03:57:55,424 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [680818401] [2023-02-16 03:57:55,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:57:55,425 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 03:57:55,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:57:55,657 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 03:57:55,658 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 03:57:55,659 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [680818401] [2023-02-16 03:57:55,659 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [680818401] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-16 03:57:55,659 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-16 03:57:55,660 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-16 03:57:55,661 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [807879165] [2023-02-16 03:57:55,662 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-16 03:57:55,665 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-16 03:57:55,667 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 03:57:55,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-16 03:57:55,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-02-16 03:57:55,705 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) [2023-02-16 03:57:55,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 03:57:55,819 INFO L93 Difference]: Finished difference Result 73 states and 85 transitions. [2023-02-16 03:57:55,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-16 03:57:55,822 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 [2023-02-16 03:57:55,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 03:57:55,828 INFO L225 Difference]: With dead ends: 73 [2023-02-16 03:57:55,829 INFO L226 Difference]: Without dead ends: 59 [2023-02-16 03:57:55,831 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 [2023-02-16 03:57:55,834 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 [2023-02-16 03:57:55,835 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] [2023-02-16 03:57:55,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2023-02-16 03:57:55,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 51. [2023-02-16 03:57:55,878 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) [2023-02-16 03:57:55,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 65 transitions. [2023-02-16 03:57:55,883 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 65 transitions. Word has length 8 [2023-02-16 03:57:55,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 03:57:55,884 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 65 transitions. [2023-02-16 03:57:55,884 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) [2023-02-16 03:57:55,884 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 65 transitions. [2023-02-16 03:57:55,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2023-02-16 03:57:55,885 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 03:57:55,885 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 03:57:55,885 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-02-16 03:57:55,886 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2023-02-16 03:57:55,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 03:57:55,887 INFO L85 PathProgramCache]: Analyzing trace with hash 1308666490, now seen corresponding path program 1 times [2023-02-16 03:57:55,887 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 03:57:55,888 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [877294745] [2023-02-16 03:57:55,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:57:55,905 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 03:57:55,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:57:56,000 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 03:57:56,001 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 03:57:56,001 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [877294745] [2023-02-16 03:57:56,001 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [877294745] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-16 03:57:56,001 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-16 03:57:56,001 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-16 03:57:56,002 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [442943759] [2023-02-16 03:57:56,002 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-16 03:57:56,003 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-16 03:57:56,003 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 03:57:56,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-16 03:57:56,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-02-16 03:57:56,004 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) [2023-02-16 03:57:56,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 03:57:56,081 INFO L93 Difference]: Finished difference Result 101 states and 137 transitions. [2023-02-16 03:57:56,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-16 03:57:56,082 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 [2023-02-16 03:57:56,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 03:57:56,084 INFO L225 Difference]: With dead ends: 101 [2023-02-16 03:57:56,084 INFO L226 Difference]: Without dead ends: 95 [2023-02-16 03:57:56,084 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 [2023-02-16 03:57:56,085 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 48 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-16 03:57:56,086 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 91 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-16 03:57:56,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2023-02-16 03:57:56,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 85. [2023-02-16 03:57:56,112 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) [2023-02-16 03:57:56,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 115 transitions. [2023-02-16 03:57:56,115 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 115 transitions. Word has length 9 [2023-02-16 03:57:56,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 03:57:56,115 INFO L495 AbstractCegarLoop]: Abstraction has 85 states and 115 transitions. [2023-02-16 03:57:56,115 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) [2023-02-16 03:57:56,116 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 115 transitions. [2023-02-16 03:57:56,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2023-02-16 03:57:56,116 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 03:57:56,116 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 03:57:56,117 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-02-16 03:57:56,117 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2023-02-16 03:57:56,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 03:57:56,118 INFO L85 PathProgramCache]: Analyzing trace with hash 1308661493, now seen corresponding path program 1 times [2023-02-16 03:57:56,118 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 03:57:56,118 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1942949762] [2023-02-16 03:57:56,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:57:56,119 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 03:57:56,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:57:56,174 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 03:57:56,175 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 03:57:56,175 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1942949762] [2023-02-16 03:57:56,175 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1942949762] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-16 03:57:56,175 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-16 03:57:56,175 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-16 03:57:56,176 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2043107368] [2023-02-16 03:57:56,176 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-16 03:57:56,176 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-16 03:57:56,177 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 03:57:56,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-16 03:57:56,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-02-16 03:57:56,178 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) [2023-02-16 03:57:56,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 03:57:56,262 INFO L93 Difference]: Finished difference Result 114 states and 152 transitions. [2023-02-16 03:57:56,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-16 03:57:56,262 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 [2023-02-16 03:57:56,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 03:57:56,265 INFO L225 Difference]: With dead ends: 114 [2023-02-16 03:57:56,265 INFO L226 Difference]: Without dead ends: 110 [2023-02-16 03:57:56,265 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 [2023-02-16 03:57:56,266 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, 0.1s IncrementalHoareTripleChecker+Time [2023-02-16 03:57:56,267 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 93 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-16 03:57:56,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2023-02-16 03:57:56,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 102. [2023-02-16 03:57:56,288 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) [2023-02-16 03:57:56,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 136 transitions. [2023-02-16 03:57:56,294 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 136 transitions. Word has length 9 [2023-02-16 03:57:56,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 03:57:56,294 INFO L495 AbstractCegarLoop]: Abstraction has 102 states and 136 transitions. [2023-02-16 03:57:56,295 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) [2023-02-16 03:57:56,295 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 136 transitions. [2023-02-16 03:57:56,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-02-16 03:57:56,295 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 03:57:56,295 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 03:57:56,296 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-02-16 03:57:56,296 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ackermannErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2023-02-16 03:57:56,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 03:57:56,297 INFO L85 PathProgramCache]: Analyzing trace with hash 1913955596, now seen corresponding path program 1 times [2023-02-16 03:57:56,297 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 03:57:56,297 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1884412022] [2023-02-16 03:57:56,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:57:56,298 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 03:57:56,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:57:56,352 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 03:57:56,352 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 03:57:56,353 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1884412022] [2023-02-16 03:57:56,353 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1884412022] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-16 03:57:56,353 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-16 03:57:56,354 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-16 03:57:56,355 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [126049056] [2023-02-16 03:57:56,355 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-16 03:57:56,355 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-16 03:57:56,356 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 03:57:56,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-16 03:57:56,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-02-16 03:57:56,357 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) [2023-02-16 03:57:56,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 03:57:56,425 INFO L93 Difference]: Finished difference Result 102 states and 136 transitions. [2023-02-16 03:57:56,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-02-16 03:57:56,425 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 [2023-02-16 03:57:56,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 03:57:56,426 INFO L225 Difference]: With dead ends: 102 [2023-02-16 03:57:56,429 INFO L226 Difference]: Without dead ends: 100 [2023-02-16 03:57:56,429 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 [2023-02-16 03:57:56,431 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 [2023-02-16 03:57:56,433 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] [2023-02-16 03:57:56,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2023-02-16 03:57:56,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 100. [2023-02-16 03:57:56,447 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) [2023-02-16 03:57:56,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 126 transitions. [2023-02-16 03:57:56,448 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 126 transitions. Word has length 10 [2023-02-16 03:57:56,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 03:57:56,449 INFO L495 AbstractCegarLoop]: Abstraction has 100 states and 126 transitions. [2023-02-16 03:57:56,449 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) [2023-02-16 03:57:56,449 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 126 transitions. [2023-02-16 03:57:56,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-02-16 03:57:56,450 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 03:57:56,450 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 03:57:56,450 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-02-16 03:57:56,450 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2023-02-16 03:57:56,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 03:57:56,451 INFO L85 PathProgramCache]: Analyzing trace with hash 1669645175, now seen corresponding path program 1 times [2023-02-16 03:57:56,451 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 03:57:56,451 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1112636198] [2023-02-16 03:57:56,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:57:56,452 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 03:57:56,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:57:56,490 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 03:57:56,491 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 03:57:56,491 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1112636198] [2023-02-16 03:57:56,491 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1112636198] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-16 03:57:56,491 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-16 03:57:56,491 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-16 03:57:56,492 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1389725822] [2023-02-16 03:57:56,492 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-16 03:57:56,492 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-16 03:57:56,492 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 03:57:56,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-16 03:57:56,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-16 03:57:56,493 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) [2023-02-16 03:57:56,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 03:57:56,537 INFO L93 Difference]: Finished difference Result 168 states and 221 transitions. [2023-02-16 03:57:56,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-16 03:57:56,538 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 [2023-02-16 03:57:56,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 03:57:56,539 INFO L225 Difference]: With dead ends: 168 [2023-02-16 03:57:56,539 INFO L226 Difference]: Without dead ends: 97 [2023-02-16 03:57:56,541 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 [2023-02-16 03:57:56,542 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 [2023-02-16 03:57:56,542 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] [2023-02-16 03:57:56,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2023-02-16 03:57:56,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 96. [2023-02-16 03:57:56,553 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) [2023-02-16 03:57:56,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 119 transitions. [2023-02-16 03:57:56,555 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 119 transitions. Word has length 15 [2023-02-16 03:57:56,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 03:57:56,555 INFO L495 AbstractCegarLoop]: Abstraction has 96 states and 119 transitions. [2023-02-16 03:57:56,555 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) [2023-02-16 03:57:56,556 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 119 transitions. [2023-02-16 03:57:56,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-02-16 03:57:56,556 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 03:57:56,556 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 03:57:56,557 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-02-16 03:57:56,557 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ackermannErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2023-02-16 03:57:56,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 03:57:56,558 INFO L85 PathProgramCache]: Analyzing trace with hash 1669645399, now seen corresponding path program 1 times [2023-02-16 03:57:56,558 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 03:57:56,558 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1335549736] [2023-02-16 03:57:56,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:57:56,559 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 03:57:56,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:57:56,632 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 03:57:56,634 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 03:57:56,635 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1335549736] [2023-02-16 03:57:56,635 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1335549736] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 03:57:56,635 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1452908263] [2023-02-16 03:57:56,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:57:56,636 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 03:57:56,636 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 03:57:56,641 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) [2023-02-16 03:57:56,643 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-02-16 03:57:56,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:57:56,685 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 6 conjunts are in the unsatisfiable core [2023-02-16 03:57:56,691 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 03:57:56,752 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 03:57:56,753 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 03:57:56,829 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 03:57:56,829 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1452908263] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 03:57:56,830 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-16 03:57:56,830 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 11 [2023-02-16 03:57:56,830 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1263236550] [2023-02-16 03:57:56,830 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-16 03:57:56,832 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-02-16 03:57:56,832 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 03:57:56,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-02-16 03:57:56,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2023-02-16 03:57:56,833 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) [2023-02-16 03:57:57,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 03:57:57,078 INFO L93 Difference]: Finished difference Result 274 states and 356 transitions. [2023-02-16 03:57:57,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-02-16 03:57:57,079 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 [2023-02-16 03:57:57,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 03:57:57,082 INFO L225 Difference]: With dead ends: 274 [2023-02-16 03:57:57,082 INFO L226 Difference]: Without dead ends: 272 [2023-02-16 03:57:57,083 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=104, Invalid=238, Unknown=0, NotChecked=0, Total=342 [2023-02-16 03:57:57,084 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 [2023-02-16 03:57:57,084 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] [2023-02-16 03:57:57,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2023-02-16 03:57:57,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 236. [2023-02-16 03:57:57,111 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) [2023-02-16 03:57:57,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 299 transitions. [2023-02-16 03:57:57,114 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 299 transitions. Word has length 15 [2023-02-16 03:57:57,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 03:57:57,114 INFO L495 AbstractCegarLoop]: Abstraction has 236 states and 299 transitions. [2023-02-16 03:57:57,115 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) [2023-02-16 03:57:57,115 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 299 transitions. [2023-02-16 03:57:57,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-02-16 03:57:57,115 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 03:57:57,115 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 03:57:57,125 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-02-16 03:57:57,322 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 [2023-02-16 03:57:57,323 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2023-02-16 03:57:57,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 03:57:57,323 INFO L85 PathProgramCache]: Analyzing trace with hash 1422985811, now seen corresponding path program 1 times [2023-02-16 03:57:57,323 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 03:57:57,323 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1277955424] [2023-02-16 03:57:57,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:57:57,324 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 03:57:57,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:57:57,398 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 03:57:57,399 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 03:57:57,399 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1277955424] [2023-02-16 03:57:57,399 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1277955424] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 03:57:57,399 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [712007692] [2023-02-16 03:57:57,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:57:57,400 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 03:57:57,400 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 03:57:57,401 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) [2023-02-16 03:57:57,407 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-02-16 03:57:57,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:57:57,434 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjunts are in the unsatisfiable core [2023-02-16 03:57:57,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 03:57:57,505 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 03:57:57,505 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 03:57:57,572 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 03:57:57,573 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [712007692] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 03:57:57,575 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-16 03:57:57,575 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 11 [2023-02-16 03:57:57,575 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1552772069] [2023-02-16 03:57:57,575 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-16 03:57:57,576 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-02-16 03:57:57,576 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 03:57:57,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-02-16 03:57:57,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2023-02-16 03:57:57,577 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) [2023-02-16 03:57:57,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 03:57:57,811 INFO L93 Difference]: Finished difference Result 512 states and 695 transitions. [2023-02-16 03:57:57,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-02-16 03:57:57,812 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 [2023-02-16 03:57:57,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 03:57:57,817 INFO L225 Difference]: With dead ends: 512 [2023-02-16 03:57:57,818 INFO L226 Difference]: Without dead ends: 510 [2023-02-16 03:57:57,819 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=116, Invalid=264, Unknown=0, NotChecked=0, Total=380 [2023-02-16 03:57:57,822 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 [2023-02-16 03:57:57,823 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] [2023-02-16 03:57:57,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 510 states. [2023-02-16 03:57:57,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 510 to 445. [2023-02-16 03:57:57,882 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) [2023-02-16 03:57:57,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 445 states to 445 states and 561 transitions. [2023-02-16 03:57:57,886 INFO L78 Accepts]: Start accepts. Automaton has 445 states and 561 transitions. Word has length 16 [2023-02-16 03:57:57,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 03:57:57,887 INFO L495 AbstractCegarLoop]: Abstraction has 445 states and 561 transitions. [2023-02-16 03:57:57,887 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) [2023-02-16 03:57:57,887 INFO L276 IsEmpty]: Start isEmpty. Operand 445 states and 561 transitions. [2023-02-16 03:57:57,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-02-16 03:57:57,890 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 03:57:57,890 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] [2023-02-16 03:57:57,901 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-02-16 03:57:58,096 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 [2023-02-16 03:57:58,096 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2023-02-16 03:57:58,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 03:57:58,097 INFO L85 PathProgramCache]: Analyzing trace with hash 1106403678, now seen corresponding path program 1 times [2023-02-16 03:57:58,097 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 03:57:58,097 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [400608201] [2023-02-16 03:57:58,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:57:58,098 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 03:57:58,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:57:58,183 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-02-16 03:57:58,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:57:58,209 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-16 03:57:58,210 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 03:57:58,210 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [400608201] [2023-02-16 03:57:58,210 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [400608201] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 03:57:58,210 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [831124784] [2023-02-16 03:57:58,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:57:58,211 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 03:57:58,211 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 03:57:58,212 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) [2023-02-16 03:57:58,227 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-02-16 03:57:58,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:57:58,259 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 6 conjunts are in the unsatisfiable core [2023-02-16 03:57:58,261 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 03:57:58,311 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-16 03:57:58,311 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-16 03:57:58,311 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [831124784] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-16 03:57:58,311 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-02-16 03:57:58,311 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7] total 12 [2023-02-16 03:57:58,312 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1436914711] [2023-02-16 03:57:58,312 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-16 03:57:58,312 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-02-16 03:57:58,312 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 03:57:58,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-02-16 03:57:58,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2023-02-16 03:57:58,313 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) [2023-02-16 03:57:58,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 03:57:58,467 INFO L93 Difference]: Finished difference Result 478 states and 600 transitions. [2023-02-16 03:57:58,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-02-16 03:57:58,467 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 [2023-02-16 03:57:58,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 03:57:58,470 INFO L225 Difference]: With dead ends: 478 [2023-02-16 03:57:58,470 INFO L226 Difference]: Without dead ends: 477 [2023-02-16 03:57:58,471 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2023-02-16 03:57:58,474 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 45 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s 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 [2023-02-16 03:57:58,475 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] [2023-02-16 03:57:58,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 477 states. [2023-02-16 03:57:58,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 477 to 444. [2023-02-16 03:57:58,506 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) [2023-02-16 03:57:58,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 444 states to 444 states and 557 transitions. [2023-02-16 03:57:58,510 INFO L78 Accepts]: Start accepts. Automaton has 444 states and 557 transitions. Word has length 24 [2023-02-16 03:57:58,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 03:57:58,511 INFO L495 AbstractCegarLoop]: Abstraction has 444 states and 557 transitions. [2023-02-16 03:57:58,511 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) [2023-02-16 03:57:58,511 INFO L276 IsEmpty]: Start isEmpty. Operand 444 states and 557 transitions. [2023-02-16 03:57:58,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-02-16 03:57:58,516 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 03:57:58,516 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] [2023-02-16 03:57:58,524 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-02-16 03:57:58,722 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 [2023-02-16 03:57:58,722 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2023-02-16 03:57:58,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 03:57:58,723 INFO L85 PathProgramCache]: Analyzing trace with hash -61224288, now seen corresponding path program 1 times [2023-02-16 03:57:58,723 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 03:57:58,723 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1100123943] [2023-02-16 03:57:58,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:57:58,723 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 03:57:58,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:57:58,825 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-02-16 03:57:58,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:57:58,856 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-16 03:57:58,856 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 03:57:58,856 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1100123943] [2023-02-16 03:57:58,856 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1100123943] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 03:57:58,856 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2018604245] [2023-02-16 03:57:58,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:57:58,857 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 03:57:58,857 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 03:57:58,858 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) [2023-02-16 03:57:58,861 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-02-16 03:57:58,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:57:58,897 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 10 conjunts are in the unsatisfiable core [2023-02-16 03:57:58,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 03:57:58,964 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-16 03:57:58,965 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 03:57:59,124 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-16 03:57:59,125 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2018604245] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 03:57:59,125 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-16 03:57:59,125 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2023-02-16 03:57:59,125 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1626429311] [2023-02-16 03:57:59,125 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-16 03:57:59,126 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-02-16 03:57:59,126 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 03:57:59,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-02-16 03:57:59,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2023-02-16 03:57:59,127 INFO L87 Difference]: Start difference. First operand 444 states and 557 transitions. Second operand has 15 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 13 states have internal predecessors, (41), 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) [2023-02-16 03:57:59,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 03:57:59,422 INFO L93 Difference]: Finished difference Result 769 states and 1113 transitions. [2023-02-16 03:57:59,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-02-16 03:57:59,423 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 13 states have internal predecessors, (41), 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 25 [2023-02-16 03:57:59,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 03:57:59,427 INFO L225 Difference]: With dead ends: 769 [2023-02-16 03:57:59,427 INFO L226 Difference]: Without dead ends: 767 [2023-02-16 03:57:59,428 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 43 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=154, Invalid=496, Unknown=0, NotChecked=0, Total=650 [2023-02-16 03:57:59,429 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 87 mSDsluCounter, 134 mSDsCounter, 0 mSdLazyCounter, 228 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 153 SdHoareTripleChecker+Invalid, 293 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 228 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-16 03:57:59,429 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [94 Valid, 153 Invalid, 293 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 228 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-16 03:57:59,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 767 states. [2023-02-16 03:57:59,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 767 to 635. [2023-02-16 03:57:59,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 635 states, 474 states have (on average 1.2046413502109705) internal successors, (571), 499 states have internal predecessors, (571), 107 states have call successors, (107), 31 states have call predecessors, (107), 49 states have return successors, (187), 104 states have call predecessors, (187), 103 states have call successors, (187) [2023-02-16 03:57:59,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 635 states to 635 states and 865 transitions. [2023-02-16 03:57:59,485 INFO L78 Accepts]: Start accepts. Automaton has 635 states and 865 transitions. Word has length 25 [2023-02-16 03:57:59,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 03:57:59,487 INFO L495 AbstractCegarLoop]: Abstraction has 635 states and 865 transitions. [2023-02-16 03:57:59,487 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 13 states have internal predecessors, (41), 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) [2023-02-16 03:57:59,487 INFO L276 IsEmpty]: Start isEmpty. Operand 635 states and 865 transitions. [2023-02-16 03:57:59,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-02-16 03:57:59,488 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 03:57:59,488 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2023-02-16 03:57:59,496 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-02-16 03:57:59,694 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 [2023-02-16 03:57:59,694 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ackermannErr6ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2023-02-16 03:57:59,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 03:57:59,695 INFO L85 PathProgramCache]: Analyzing trace with hash -1846384600, now seen corresponding path program 1 times [2023-02-16 03:57:59,695 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 03:57:59,695 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [570728694] [2023-02-16 03:57:59,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:57:59,695 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 03:57:59,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:57:59,779 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 03:57:59,780 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 03:57:59,781 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [570728694] [2023-02-16 03:57:59,781 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [570728694] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 03:57:59,781 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [568289281] [2023-02-16 03:57:59,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:57:59,782 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 03:57:59,782 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 03:57:59,783 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) [2023-02-16 03:57:59,798 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-02-16 03:57:59,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:57:59,833 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 8 conjunts are in the unsatisfiable core [2023-02-16 03:57:59,834 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 03:57:59,864 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 03:57:59,864 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 03:57:59,947 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 03:57:59,947 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [568289281] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 03:57:59,947 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-16 03:57:59,948 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 15 [2023-02-16 03:57:59,948 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [776242575] [2023-02-16 03:57:59,948 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-16 03:57:59,949 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-02-16 03:57:59,949 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 03:57:59,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-02-16 03:57:59,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2023-02-16 03:57:59,950 INFO L87 Difference]: Start difference. First operand 635 states and 865 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) [2023-02-16 03:58:00,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 03:58:00,273 INFO L93 Difference]: Finished difference Result 989 states and 1395 transitions. [2023-02-16 03:58:00,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-02-16 03:58:00,273 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 [2023-02-16 03:58:00,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 03:58:00,280 INFO L225 Difference]: With dead ends: 989 [2023-02-16 03:58:00,280 INFO L226 Difference]: Without dead ends: 988 [2023-02-16 03:58:00,281 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=214, Invalid=488, Unknown=0, NotChecked=0, Total=702 [2023-02-16 03:58:00,282 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 231 mSDsluCounter, 229 mSDsCounter, 0 mSdLazyCounter, 289 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 234 SdHoareTripleChecker+Valid, 267 SdHoareTripleChecker+Invalid, 353 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 289 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-16 03:58:00,283 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [234 Valid, 267 Invalid, 353 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 289 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-16 03:58:00,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 988 states. [2023-02-16 03:58:00,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 988 to 917. [2023-02-16 03:58:00,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 917 states, 681 states have (on average 1.171806167400881) internal successors, (798), 721 states have internal predecessors, (798), 155 states have call successors, (155), 43 states have call predecessors, (155), 76 states have return successors, (278), 152 states have call predecessors, (278), 151 states have call successors, (278) [2023-02-16 03:58:00,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 917 states to 917 states and 1231 transitions. [2023-02-16 03:58:00,354 INFO L78 Accepts]: Start accepts. Automaton has 917 states and 1231 transitions. Word has length 27 [2023-02-16 03:58:00,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 03:58:00,354 INFO L495 AbstractCegarLoop]: Abstraction has 917 states and 1231 transitions. [2023-02-16 03:58:00,354 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) [2023-02-16 03:58:00,354 INFO L276 IsEmpty]: Start isEmpty. Operand 917 states and 1231 transitions. [2023-02-16 03:58:00,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-02-16 03:58:00,355 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 03:58:00,356 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] [2023-02-16 03:58:00,368 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-02-16 03:58:00,560 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 [2023-02-16 03:58:00,561 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ackermannErr6ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2023-02-16 03:58:00,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 03:58:00,561 INFO L85 PathProgramCache]: Analyzing trace with hash 1298021223, now seen corresponding path program 1 times [2023-02-16 03:58:00,561 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 03:58:00,561 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1012017781] [2023-02-16 03:58:00,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:58:00,562 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 03:58:00,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:58:00,623 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-02-16 03:58:00,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:58:00,645 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-02-16 03:58:00,645 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 03:58:00,645 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1012017781] [2023-02-16 03:58:00,645 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1012017781] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 03:58:00,645 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2004113689] [2023-02-16 03:58:00,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:58:00,646 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 03:58:00,646 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 03:58:00,647 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) [2023-02-16 03:58:00,654 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-02-16 03:58:00,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:58:00,687 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 10 conjunts are in the unsatisfiable core [2023-02-16 03:58:00,688 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 03:58:00,723 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-02-16 03:58:00,723 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 03:58:00,837 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-02-16 03:58:00,837 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2004113689] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 03:58:00,837 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-16 03:58:00,837 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2023-02-16 03:58:00,839 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [20484881] [2023-02-16 03:58:00,839 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-16 03:58:00,840 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-02-16 03:58:00,840 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 03:58:00,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-02-16 03:58:00,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2023-02-16 03:58:00,841 INFO L87 Difference]: Start difference. First operand 917 states and 1231 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) [2023-02-16 03:58:01,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 03:58:01,174 INFO L93 Difference]: Finished difference Result 1430 states and 2152 transitions. [2023-02-16 03:58:01,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-02-16 03:58:01,175 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 [2023-02-16 03:58:01,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 03:58:01,183 INFO L225 Difference]: With dead ends: 1430 [2023-02-16 03:58:01,183 INFO L226 Difference]: Without dead ends: 1425 [2023-02-16 03:58:01,184 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 47 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=136, Invalid=416, Unknown=0, NotChecked=0, Total=552 [2023-02-16 03:58:01,184 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 156 mSDsluCounter, 104 mSDsCounter, 0 mSdLazyCounter, 202 mSolverCounterSat, 92 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 156 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 294 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 202 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-16 03:58:01,185 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [156 Valid, 123 Invalid, 294 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [92 Valid, 202 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-16 03:58:01,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1425 states. [2023-02-16 03:58:01,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1425 to 1080. [2023-02-16 03:58:01,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1080 states, 804 states have (on average 1.1703980099502487) internal successors, (941), 853 states have internal predecessors, (941), 175 states have call successors, (175), 53 states have call predecessors, (175), 96 states have return successors, (415), 173 states have call predecessors, (415), 170 states have call successors, (415) [2023-02-16 03:58:01,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1080 states to 1080 states and 1531 transitions. [2023-02-16 03:58:01,278 INFO L78 Accepts]: Start accepts. Automaton has 1080 states and 1531 transitions. Word has length 27 [2023-02-16 03:58:01,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 03:58:01,279 INFO L495 AbstractCegarLoop]: Abstraction has 1080 states and 1531 transitions. [2023-02-16 03:58:01,279 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) [2023-02-16 03:58:01,279 INFO L276 IsEmpty]: Start isEmpty. Operand 1080 states and 1531 transitions. [2023-02-16 03:58:01,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2023-02-16 03:58:01,281 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 03:58:01,281 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] [2023-02-16 03:58:01,291 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-02-16 03:58:01,486 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 [2023-02-16 03:58:01,486 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2023-02-16 03:58:01,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 03:58:01,487 INFO L85 PathProgramCache]: Analyzing trace with hash -722353775, now seen corresponding path program 1 times [2023-02-16 03:58:01,487 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 03:58:01,487 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [501347902] [2023-02-16 03:58:01,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:58:01,487 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 03:58:01,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:58:01,541 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-02-16 03:58:01,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:58:01,563 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-02-16 03:58:01,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:58:01,591 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-02-16 03:58:01,592 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 03:58:01,592 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [501347902] [2023-02-16 03:58:01,592 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [501347902] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 03:58:01,592 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [533256742] [2023-02-16 03:58:01,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:58:01,592 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 03:58:01,593 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 03:58:01,594 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) [2023-02-16 03:58:01,597 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-02-16 03:58:01,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:58:01,630 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 9 conjunts are in the unsatisfiable core [2023-02-16 03:58:01,632 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 03:58:01,668 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-02-16 03:58:01,669 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 03:58:01,850 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-02-16 03:58:01,850 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [533256742] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 03:58:01,850 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-16 03:58:01,851 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2023-02-16 03:58:01,851 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [781718800] [2023-02-16 03:58:01,851 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-16 03:58:01,852 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-02-16 03:58:01,852 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 03:58:01,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-02-16 03:58:01,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2023-02-16 03:58:01,853 INFO L87 Difference]: Start difference. First operand 1080 states and 1531 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) [2023-02-16 03:58:02,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 03:58:02,370 INFO L93 Difference]: Finished difference Result 1847 states and 3105 transitions. [2023-02-16 03:58:02,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-02-16 03:58:02,370 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 [2023-02-16 03:58:02,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 03:58:02,382 INFO L225 Difference]: With dead ends: 1847 [2023-02-16 03:58:02,382 INFO L226 Difference]: Without dead ends: 1833 [2023-02-16 03:58:02,383 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=188, Invalid=682, Unknown=0, NotChecked=0, Total=870 [2023-02-16 03:58:02,384 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 131 mSDsluCounter, 149 mSDsCounter, 0 mSdLazyCounter, 306 mSolverCounterSat, 115 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 175 SdHoareTripleChecker+Invalid, 421 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 115 IncrementalHoareTripleChecker+Valid, 306 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-16 03:58:02,385 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [131 Valid, 175 Invalid, 421 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [115 Valid, 306 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-16 03:58:02,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1833 states. [2023-02-16 03:58:02,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1833 to 1577. [2023-02-16 03:58:02,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1577 states, 1149 states have (on average 1.162750217580505) internal successors, (1336), 1210 states have internal predecessors, (1336), 271 states have call successors, (271), 73 states have call predecessors, (271), 152 states have return successors, (774), 293 states have call predecessors, (774), 263 states have call successors, (774) [2023-02-16 03:58:02,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1577 states to 1577 states and 2381 transitions. [2023-02-16 03:58:02,538 INFO L78 Accepts]: Start accepts. Automaton has 1577 states and 2381 transitions. Word has length 34 [2023-02-16 03:58:02,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 03:58:02,538 INFO L495 AbstractCegarLoop]: Abstraction has 1577 states and 2381 transitions. [2023-02-16 03:58:02,538 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) [2023-02-16 03:58:02,538 INFO L276 IsEmpty]: Start isEmpty. Operand 1577 states and 2381 transitions. [2023-02-16 03:58:02,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2023-02-16 03:58:02,539 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 03:58:02,540 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] [2023-02-16 03:58:02,548 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-02-16 03:58:02,745 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 [2023-02-16 03:58:02,746 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ackermannErr6ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2023-02-16 03:58:02,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 03:58:02,746 INFO L85 PathProgramCache]: Analyzing trace with hash 1607744024, now seen corresponding path program 1 times [2023-02-16 03:58:02,746 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 03:58:02,747 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2115376761] [2023-02-16 03:58:02,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:58:02,747 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 03:58:02,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:58:02,793 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-02-16 03:58:02,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:58:02,820 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-02-16 03:58:02,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:58:02,848 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 14 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-02-16 03:58:02,848 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 03:58:02,849 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2115376761] [2023-02-16 03:58:02,849 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2115376761] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 03:58:02,849 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [413362186] [2023-02-16 03:58:02,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:58:02,849 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 03:58:02,849 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 03:58:02,851 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) [2023-02-16 03:58:02,878 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-02-16 03:58:02,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:58:02,900 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 9 conjunts are in the unsatisfiable core [2023-02-16 03:58:02,902 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 03:58:02,941 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 12 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-02-16 03:58:02,941 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 03:58:03,107 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-02-16 03:58:03,107 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [413362186] provided 1 perfect and 1 imperfect interpolant sequences [2023-02-16 03:58:03,107 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-02-16 03:58:03,107 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8, 8] total 17 [2023-02-16 03:58:03,108 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1671774618] [2023-02-16 03:58:03,108 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-16 03:58:03,108 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-02-16 03:58:03,108 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 03:58:03,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-02-16 03:58:03,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2023-02-16 03:58:03,109 INFO L87 Difference]: Start difference. First operand 1577 states and 2381 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) [2023-02-16 03:58:03,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 03:58:03,411 INFO L93 Difference]: Finished difference Result 1736 states and 2788 transitions. [2023-02-16 03:58:03,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-02-16 03:58:03,412 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 [2023-02-16 03:58:03,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 03:58:03,422 INFO L225 Difference]: With dead ends: 1736 [2023-02-16 03:58:03,422 INFO L226 Difference]: Without dead ends: 1735 [2023-02-16 03:58:03,423 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=100, Invalid=550, Unknown=0, NotChecked=0, Total=650 [2023-02-16 03:58:03,424 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 65 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 172 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 142 SdHoareTripleChecker+Invalid, 215 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 172 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-16 03:58:03,425 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [71 Valid, 142 Invalid, 215 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 172 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-16 03:58:03,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1735 states. [2023-02-16 03:58:03,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1735 to 1614. [2023-02-16 03:58:03,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1614 states, 1173 states have (on average 1.1568627450980393) internal successors, (1357), 1231 states have internal predecessors, (1357), 287 states have call successors, (287), 73 states have call predecessors, (287), 149 states have return successors, (703), 309 states have call predecessors, (703), 279 states have call successors, (703) [2023-02-16 03:58:03,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1614 states to 1614 states and 2347 transitions. [2023-02-16 03:58:03,553 INFO L78 Accepts]: Start accepts. Automaton has 1614 states and 2347 transitions. Word has length 36 [2023-02-16 03:58:03,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 03:58:03,554 INFO L495 AbstractCegarLoop]: Abstraction has 1614 states and 2347 transitions. [2023-02-16 03:58:03,554 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) [2023-02-16 03:58:03,554 INFO L276 IsEmpty]: Start isEmpty. Operand 1614 states and 2347 transitions. [2023-02-16 03:58:03,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-02-16 03:58:03,557 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 03:58:03,557 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] [2023-02-16 03:58:03,575 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-02-16 03:58:03,776 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 [2023-02-16 03:58:03,776 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ackermannErr6ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2023-02-16 03:58:03,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 03:58:03,776 INFO L85 PathProgramCache]: Analyzing trace with hash -1310665197, now seen corresponding path program 2 times [2023-02-16 03:58:03,776 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 03:58:03,777 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2069862679] [2023-02-16 03:58:03,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:58:03,777 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 03:58:03,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:58:03,894 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2023-02-16 03:58:03,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:58:03,920 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 2 proven. 40 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-02-16 03:58:03,920 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 03:58:03,920 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2069862679] [2023-02-16 03:58:03,921 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2069862679] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 03:58:03,921 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [665390798] [2023-02-16 03:58:03,921 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-16 03:58:03,921 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 03:58:03,921 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 03:58:03,925 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) [2023-02-16 03:58:03,928 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-02-16 03:58:03,965 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-16 03:58:03,966 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-16 03:58:03,967 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 14 conjunts are in the unsatisfiable core [2023-02-16 03:58:03,968 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 03:58:04,040 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 2 proven. 40 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-02-16 03:58:04,040 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 03:58:04,227 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 4 proven. 38 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-02-16 03:58:04,227 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [665390798] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 03:58:04,227 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-16 03:58:04,227 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 22 [2023-02-16 03:58:04,227 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1561795752] [2023-02-16 03:58:04,227 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-16 03:58:04,228 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-02-16 03:58:04,228 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 03:58:04,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-02-16 03:58:04,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2023-02-16 03:58:04,229 INFO L87 Difference]: Start difference. First operand 1614 states and 2347 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) [2023-02-16 03:58:05,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 03:58:05,145 INFO L93 Difference]: Finished difference Result 3141 states and 5440 transitions. [2023-02-16 03:58:05,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2023-02-16 03:58:05,146 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 [2023-02-16 03:58:05,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 03:58:05,167 INFO L225 Difference]: With dead ends: 3141 [2023-02-16 03:58:05,167 INFO L226 Difference]: Without dead ends: 3140 [2023-02-16 03:58:05,170 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 76 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 447 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=573, Invalid=1779, Unknown=0, NotChecked=0, Total=2352 [2023-02-16 03:58:05,171 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 508 mSDsluCounter, 169 mSDsCounter, 0 mSdLazyCounter, 465 mSolverCounterSat, 422 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 508 SdHoareTripleChecker+Valid, 188 SdHoareTripleChecker+Invalid, 887 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 422 IncrementalHoareTripleChecker+Valid, 465 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-02-16 03:58:05,171 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [508 Valid, 188 Invalid, 887 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [422 Valid, 465 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-02-16 03:58:05,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3140 states. [2023-02-16 03:58:05,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3140 to 2201. [2023-02-16 03:58:05,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2201 states, 1612 states have (on average 1.1557071960297767) internal successors, (1863), 1689 states have internal predecessors, (1863), 372 states have call successors, (372), 107 states have call predecessors, (372), 212 states have return successors, (1147), 404 states have call predecessors, (1147), 364 states have call successors, (1147) [2023-02-16 03:58:05,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2201 states to 2201 states and 3382 transitions. [2023-02-16 03:58:05,432 INFO L78 Accepts]: Start accepts. Automaton has 2201 states and 3382 transitions. Word has length 43 [2023-02-16 03:58:05,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 03:58:05,432 INFO L495 AbstractCegarLoop]: Abstraction has 2201 states and 3382 transitions. [2023-02-16 03:58:05,433 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) [2023-02-16 03:58:05,433 INFO L276 IsEmpty]: Start isEmpty. Operand 2201 states and 3382 transitions. [2023-02-16 03:58:05,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2023-02-16 03:58:05,435 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 03:58:05,435 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] [2023-02-16 03:58:05,448 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-02-16 03:58:05,640 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 [2023-02-16 03:58:05,641 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ackermannErr6ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2023-02-16 03:58:05,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 03:58:05,641 INFO L85 PathProgramCache]: Analyzing trace with hash -1058043410, now seen corresponding path program 2 times [2023-02-16 03:58:05,642 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 03:58:05,642 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [595081061] [2023-02-16 03:58:05,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:58:05,642 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 03:58:05,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:58:05,701 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-02-16 03:58:05,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:58:05,735 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-02-16 03:58:05,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:58:05,766 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 26 proven. 8 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-02-16 03:58:05,766 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 03:58:05,766 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [595081061] [2023-02-16 03:58:05,766 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [595081061] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 03:58:05,766 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1231120871] [2023-02-16 03:58:05,767 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-16 03:58:05,767 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 03:58:05,767 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 03:58:05,769 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) [2023-02-16 03:58:05,794 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-02-16 03:58:05,817 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-16 03:58:05,817 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-16 03:58:05,818 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 11 conjunts are in the unsatisfiable core [2023-02-16 03:58:05,820 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 03:58:05,865 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 24 proven. 10 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-02-16 03:58:05,865 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 03:58:06,085 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 28 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-02-16 03:58:06,086 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1231120871] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 03:58:06,086 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-16 03:58:06,086 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 21 [2023-02-16 03:58:06,086 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1667338203] [2023-02-16 03:58:06,086 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-16 03:58:06,087 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-02-16 03:58:06,087 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 03:58:06,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-02-16 03:58:06,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2023-02-16 03:58:06,088 INFO L87 Difference]: Start difference. First operand 2201 states and 3382 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) [2023-02-16 03:58:07,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 03:58:07,295 INFO L93 Difference]: Finished difference Result 4449 states and 8202 transitions. [2023-02-16 03:58:07,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-02-16 03:58:07,295 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 [2023-02-16 03:58:07,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 03:58:07,316 INFO L225 Difference]: With dead ends: 4449 [2023-02-16 03:58:07,316 INFO L226 Difference]: Without dead ends: 3134 [2023-02-16 03:58:07,330 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 482 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=582, Invalid=1968, Unknown=0, NotChecked=0, Total=2550 [2023-02-16 03:58:07,331 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 198 mSDsluCounter, 254 mSDsCounter, 0 mSdLazyCounter, 682 mSolverCounterSat, 305 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 198 SdHoareTripleChecker+Valid, 290 SdHoareTripleChecker+Invalid, 987 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 305 IncrementalHoareTripleChecker+Valid, 682 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-02-16 03:58:07,331 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [198 Valid, 290 Invalid, 987 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [305 Valid, 682 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-02-16 03:58:07,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3134 states. [2023-02-16 03:58:07,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3134 to 2494. [2023-02-16 03:58:07,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2494 states, 1823 states have (on average 1.1492046077893583) internal successors, (2095), 1909 states have internal predecessors, (2095), 428 states have call successors, (428), 122 states have call predecessors, (428), 238 states have return successors, (1243), 462 states have call predecessors, (1243), 420 states have call successors, (1243) [2023-02-16 03:58:07,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2494 states to 2494 states and 3766 transitions. [2023-02-16 03:58:07,569 INFO L78 Accepts]: Start accepts. Automaton has 2494 states and 3766 transitions. Word has length 44 [2023-02-16 03:58:07,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 03:58:07,570 INFO L495 AbstractCegarLoop]: Abstraction has 2494 states and 3766 transitions. [2023-02-16 03:58:07,570 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) [2023-02-16 03:58:07,570 INFO L276 IsEmpty]: Start isEmpty. Operand 2494 states and 3766 transitions. [2023-02-16 03:58:07,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2023-02-16 03:58:07,572 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 03:58:07,573 INFO L195 NwaCegarLoop]: trace histogram [5, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 03:58:07,584 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-02-16 03:58:07,778 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 [2023-02-16 03:58:07,779 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2023-02-16 03:58:07,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 03:58:07,779 INFO L85 PathProgramCache]: Analyzing trace with hash 1051982124, now seen corresponding path program 1 times [2023-02-16 03:58:07,779 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 03:58:07,779 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1799348635] [2023-02-16 03:58:07,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:58:07,780 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 03:58:07,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:58:07,807 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-02-16 03:58:07,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:58:07,820 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-02-16 03:58:07,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:58:07,833 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2023-02-16 03:58:07,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:58:07,837 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 24 proven. 5 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-02-16 03:58:07,837 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 03:58:07,837 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1799348635] [2023-02-16 03:58:07,837 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1799348635] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 03:58:07,838 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2081419072] [2023-02-16 03:58:07,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:58:07,838 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 03:58:07,838 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 03:58:07,839 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) [2023-02-16 03:58:07,849 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-02-16 03:58:07,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:58:07,888 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 6 conjunts are in the unsatisfiable core [2023-02-16 03:58:07,889 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 03:58:07,929 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 22 proven. 5 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-02-16 03:58:07,929 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 03:58:08,048 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 22 proven. 5 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-02-16 03:58:08,049 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2081419072] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 03:58:08,049 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-16 03:58:08,049 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7, 7] total 12 [2023-02-16 03:58:08,049 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1423779176] [2023-02-16 03:58:08,049 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-16 03:58:08,049 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-02-16 03:58:08,049 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 03:58:08,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-02-16 03:58:08,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2023-02-16 03:58:08,050 INFO L87 Difference]: Start difference. First operand 2494 states and 3766 transitions. Second operand has 12 states, 12 states have (on average 4.0) internal successors, (48), 12 states have internal predecessors, (48), 4 states have call successors, (6), 2 states have call predecessors, (6), 5 states have return successors, (5), 2 states have call predecessors, (5), 4 states have call successors, (5) [2023-02-16 03:58:08,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 03:58:08,284 INFO L93 Difference]: Finished difference Result 3517 states and 5520 transitions. [2023-02-16 03:58:08,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-02-16 03:58:08,285 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.0) internal successors, (48), 12 states have internal predecessors, (48), 4 states have call successors, (6), 2 states have call predecessors, (6), 5 states have return successors, (5), 2 states have call predecessors, (5), 4 states have call successors, (5) Word has length 44 [2023-02-16 03:58:08,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 03:58:08,292 INFO L225 Difference]: With dead ends: 3517 [2023-02-16 03:58:08,292 INFO L226 Difference]: Without dead ends: 1211 [2023-02-16 03:58:08,305 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 87 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2023-02-16 03:58:08,306 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 53 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 148 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-16 03:58:08,306 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 103 Invalid, 148 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 116 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-16 03:58:08,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1211 states. [2023-02-16 03:58:08,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1211 to 1182. [2023-02-16 03:58:08,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1182 states, 881 states have (on average 1.112372304199773) internal successors, (980), 905 states have internal predecessors, (980), 212 states have call successors, (212), 67 states have call predecessors, (212), 85 states have return successors, (333), 209 states have call predecessors, (333), 208 states have call successors, (333) [2023-02-16 03:58:08,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1182 states to 1182 states and 1525 transitions. [2023-02-16 03:58:08,400 INFO L78 Accepts]: Start accepts. Automaton has 1182 states and 1525 transitions. Word has length 44 [2023-02-16 03:58:08,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 03:58:08,400 INFO L495 AbstractCegarLoop]: Abstraction has 1182 states and 1525 transitions. [2023-02-16 03:58:08,400 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.0) internal successors, (48), 12 states have internal predecessors, (48), 4 states have call successors, (6), 2 states have call predecessors, (6), 5 states have return successors, (5), 2 states have call predecessors, (5), 4 states have call successors, (5) [2023-02-16 03:58:08,401 INFO L276 IsEmpty]: Start isEmpty. Operand 1182 states and 1525 transitions. [2023-02-16 03:58:08,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2023-02-16 03:58:08,402 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 03:58:08,402 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] [2023-02-16 03:58:08,409 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-02-16 03:58:08,607 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 [2023-02-16 03:58:08,608 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2023-02-16 03:58:08,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 03:58:08,608 INFO L85 PathProgramCache]: Analyzing trace with hash 843839239, now seen corresponding path program 1 times [2023-02-16 03:58:08,608 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 03:58:08,608 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1744098642] [2023-02-16 03:58:08,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:58:08,609 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 03:58:08,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:58:08,701 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-02-16 03:58:08,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:58:08,740 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-02-16 03:58:08,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:58:08,770 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-02-16 03:58:08,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:58:08,803 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2023-02-16 03:58:08,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:58:08,860 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 21 proven. 16 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-02-16 03:58:08,861 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 03:58:08,861 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1744098642] [2023-02-16 03:58:08,861 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1744098642] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 03:58:08,861 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1187956503] [2023-02-16 03:58:08,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:58:08,861 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 03:58:08,862 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 03:58:08,863 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) [2023-02-16 03:58:08,865 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-02-16 03:58:08,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:58:08,911 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 15 conjunts are in the unsatisfiable core [2023-02-16 03:58:08,912 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 03:58:08,964 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 14 proven. 18 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2023-02-16 03:58:08,964 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 03:58:09,407 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 18 proven. 19 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-02-16 03:58:09,408 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1187956503] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 03:58:09,408 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-16 03:58:09,408 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 13] total 26 [2023-02-16 03:58:09,408 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1837001966] [2023-02-16 03:58:09,408 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-16 03:58:09,408 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-02-16 03:58:09,408 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 03:58:09,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-02-16 03:58:09,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=614, Unknown=0, NotChecked=0, Total=702 [2023-02-16 03:58:09,409 INFO L87 Difference]: Start difference. First operand 1182 states and 1525 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) [2023-02-16 03:58:10,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 03:58:10,829 INFO L93 Difference]: Finished difference Result 3123 states and 5780 transitions. [2023-02-16 03:58:10,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2023-02-16 03:58:10,829 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 [2023-02-16 03:58:10,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 03:58:10,853 INFO L225 Difference]: With dead ends: 3123 [2023-02-16 03:58:10,854 INFO L226 Difference]: Without dead ends: 3117 [2023-02-16 03:58:10,858 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1680 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1154, Invalid=5008, Unknown=0, NotChecked=0, Total=6162 [2023-02-16 03:58:10,859 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 253 mSDsluCounter, 198 mSDsCounter, 0 mSdLazyCounter, 688 mSolverCounterSat, 515 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 264 SdHoareTripleChecker+Valid, 220 SdHoareTripleChecker+Invalid, 1203 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 515 IncrementalHoareTripleChecker+Valid, 688 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-02-16 03:58:10,860 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [264 Valid, 220 Invalid, 1203 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [515 Valid, 688 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-02-16 03:58:10,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3117 states. [2023-02-16 03:58:11,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3117 to 2241. [2023-02-16 03:58:11,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2241 states, 1548 states have (on average 1.0872093023255813) internal successors, (1683), 1572 states have internal predecessors, (1683), 429 states have call successors, (429), 81 states have call predecessors, (429), 260 states have return successors, (2514), 587 states have call predecessors, (2514), 423 states have call successors, (2514) [2023-02-16 03:58:11,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2241 states to 2241 states and 4626 transitions. [2023-02-16 03:58:11,130 INFO L78 Accepts]: Start accepts. Automaton has 2241 states and 4626 transitions. Word has length 53 [2023-02-16 03:58:11,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 03:58:11,131 INFO L495 AbstractCegarLoop]: Abstraction has 2241 states and 4626 transitions. [2023-02-16 03:58:11,131 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) [2023-02-16 03:58:11,131 INFO L276 IsEmpty]: Start isEmpty. Operand 2241 states and 4626 transitions. [2023-02-16 03:58:11,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2023-02-16 03:58:11,133 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 03:58:11,133 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1] [2023-02-16 03:58:11,141 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-02-16 03:58:11,338 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 [2023-02-16 03:58:11,339 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ackermannErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2023-02-16 03:58:11,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 03:58:11,339 INFO L85 PathProgramCache]: Analyzing trace with hash 2013961680, now seen corresponding path program 1 times [2023-02-16 03:58:11,339 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 03:58:11,339 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [737825896] [2023-02-16 03:58:11,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:58:11,339 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 03:58:11,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:58:11,484 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 111 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-02-16 03:58:11,485 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 03:58:11,485 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [737825896] [2023-02-16 03:58:11,485 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [737825896] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 03:58:11,485 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [425935876] [2023-02-16 03:58:11,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:58:11,485 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 03:58:11,486 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 03:58:11,487 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) [2023-02-16 03:58:11,489 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-02-16 03:58:11,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:58:11,539 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 18 conjunts are in the unsatisfiable core [2023-02-16 03:58:11,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 03:58:11,623 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 111 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-02-16 03:58:11,623 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 03:58:11,808 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 111 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-02-16 03:58:11,809 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [425935876] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 03:58:11,809 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-16 03:58:11,809 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 23 [2023-02-16 03:58:11,809 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1227700121] [2023-02-16 03:58:11,809 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-16 03:58:11,809 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-02-16 03:58:11,809 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 03:58:11,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-02-16 03:58:11,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=416, Unknown=0, NotChecked=0, Total=552 [2023-02-16 03:58:11,810 INFO L87 Difference]: Start difference. First operand 2241 states and 4626 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) [2023-02-16 03:58:12,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 03:58:12,724 INFO L93 Difference]: Finished difference Result 6148 states and 12929 transitions. [2023-02-16 03:58:12,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2023-02-16 03:58:12,724 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 [2023-02-16 03:58:12,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 03:58:12,767 INFO L225 Difference]: With dead ends: 6148 [2023-02-16 03:58:12,767 INFO L226 Difference]: Without dead ends: 6147 [2023-02-16 03:58:12,772 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 107 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 339 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=554, Invalid=1252, Unknown=0, NotChecked=0, Total=1806 [2023-02-16 03:58:12,773 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 716 mSDsluCounter, 308 mSDsCounter, 0 mSdLazyCounter, 449 mSolverCounterSat, 272 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 721 SdHoareTripleChecker+Valid, 337 SdHoareTripleChecker+Invalid, 721 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 272 IncrementalHoareTripleChecker+Valid, 449 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-16 03:58:12,773 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [721 Valid, 337 Invalid, 721 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [272 Valid, 449 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-16 03:58:12,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6147 states. [2023-02-16 03:58:13,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6147 to 6063. [2023-02-16 03:58:13,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6063 states, 4212 states have (on average 1.089031339031339) internal successors, (4587), 4284 states have internal predecessors, (4587), 1161 states have call successors, (1161), 231 states have call predecessors, (1161), 686 states have return successors, (6822), 1547 states have call predecessors, (6822), 1155 states have call successors, (6822) [2023-02-16 03:58:13,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6063 states to 6063 states and 12570 transitions. [2023-02-16 03:58:13,446 INFO L78 Accepts]: Start accepts. Automaton has 6063 states and 12570 transitions. Word has length 57 [2023-02-16 03:58:13,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 03:58:13,446 INFO L495 AbstractCegarLoop]: Abstraction has 6063 states and 12570 transitions. [2023-02-16 03:58:13,447 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) [2023-02-16 03:58:13,447 INFO L276 IsEmpty]: Start isEmpty. Operand 6063 states and 12570 transitions. [2023-02-16 03:58:13,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2023-02-16 03:58:13,448 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 03:58:13,449 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] [2023-02-16 03:58:13,453 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-02-16 03:58:13,653 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 [2023-02-16 03:58:13,653 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ackermannErr6ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2023-02-16 03:58:13,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 03:58:13,653 INFO L85 PathProgramCache]: Analyzing trace with hash -814290418, now seen corresponding path program 1 times [2023-02-16 03:58:13,654 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 03:58:13,654 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [885532522] [2023-02-16 03:58:13,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:58:13,654 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 03:58:13,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:58:13,756 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-02-16 03:58:13,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:58:13,793 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-02-16 03:58:13,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:58:13,815 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-02-16 03:58:13,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:58:13,844 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2023-02-16 03:58:13,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:58:13,870 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 36 proven. 6 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-02-16 03:58:13,870 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 03:58:13,870 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [885532522] [2023-02-16 03:58:13,870 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [885532522] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 03:58:13,870 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2031045853] [2023-02-16 03:58:13,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:58:13,871 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 03:58:13,871 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 03:58:13,872 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) [2023-02-16 03:58:13,874 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-02-16 03:58:13,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:58:13,920 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 15 conjunts are in the unsatisfiable core [2023-02-16 03:58:13,921 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 03:58:13,962 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 27 proven. 10 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2023-02-16 03:58:13,962 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 03:58:14,470 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 40 proven. 2 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-02-16 03:58:14,471 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2031045853] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 03:58:14,471 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-16 03:58:14,472 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 13] total 26 [2023-02-16 03:58:14,472 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [196333846] [2023-02-16 03:58:14,472 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-16 03:58:14,474 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-02-16 03:58:14,474 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 03:58:14,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-02-16 03:58:14,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=608, Unknown=0, NotChecked=0, Total=702 [2023-02-16 03:58:14,476 INFO L87 Difference]: Start difference. First operand 6063 states and 12570 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) [2023-02-16 03:58:16,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 03:58:16,799 INFO L93 Difference]: Finished difference Result 22151 states and 80869 transitions. [2023-02-16 03:58:16,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2023-02-16 03:58:16,799 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 [2023-02-16 03:58:16,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 03:58:17,023 INFO L225 Difference]: With dead ends: 22151 [2023-02-16 03:58:17,023 INFO L226 Difference]: Without dead ends: 16963 [2023-02-16 03:58:17,152 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 815 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=905, Invalid=3517, Unknown=0, NotChecked=0, Total=4422 [2023-02-16 03:58:17,153 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 220 mSDsluCounter, 308 mSDsCounter, 0 mSdLazyCounter, 795 mSolverCounterSat, 307 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 220 SdHoareTripleChecker+Valid, 344 SdHoareTripleChecker+Invalid, 1102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 307 IncrementalHoareTripleChecker+Valid, 795 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-02-16 03:58:17,153 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [220 Valid, 344 Invalid, 1102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [307 Valid, 795 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-02-16 03:58:17,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16963 states. [2023-02-16 03:58:19,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16963 to 13356. [2023-02-16 03:58:19,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13356 states, 8756 states have (on average 1.0572179077204202) internal successors, (9257), 8789 states have internal predecessors, (9257), 2669 states have call successors, (2669), 308 states have call predecessors, (2669), 1927 states have return successors, (36980), 4258 states have call predecessors, (36980), 2658 states have call successors, (36980) [2023-02-16 03:58:19,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13356 states to 13356 states and 48906 transitions. [2023-02-16 03:58:19,321 INFO L78 Accepts]: Start accepts. Automaton has 13356 states and 48906 transitions. Word has length 55 [2023-02-16 03:58:19,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 03:58:19,321 INFO L495 AbstractCegarLoop]: Abstraction has 13356 states and 48906 transitions. [2023-02-16 03:58:19,322 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) [2023-02-16 03:58:19,322 INFO L276 IsEmpty]: Start isEmpty. Operand 13356 states and 48906 transitions. [2023-02-16 03:58:19,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2023-02-16 03:58:19,324 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 03:58:19,324 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1] [2023-02-16 03:58:19,332 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-02-16 03:58:19,530 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 [2023-02-16 03:58:19,530 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ackermannErr6ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2023-02-16 03:58:19,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 03:58:19,531 INFO L85 PathProgramCache]: Analyzing trace with hash 1321083776, now seen corresponding path program 2 times [2023-02-16 03:58:19,531 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 03:58:19,531 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [267772134] [2023-02-16 03:58:19,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:58:19,531 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 03:58:19,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:58:19,718 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 03:58:19,719 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 03:58:19,719 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [267772134] [2023-02-16 03:58:19,719 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [267772134] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 03:58:19,719 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1559880480] [2023-02-16 03:58:19,719 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-16 03:58:19,719 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 03:58:19,720 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 03:58:19,721 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) [2023-02-16 03:58:19,723 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-02-16 03:58:19,772 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-16 03:58:19,773 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-16 03:58:19,774 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 16 conjunts are in the unsatisfiable core [2023-02-16 03:58:19,775 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 03:58:19,836 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 03:58:19,836 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 03:58:20,123 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 03:58:20,123 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1559880480] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 03:58:20,123 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-16 03:58:20,123 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 31 [2023-02-16 03:58:20,123 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [235687119] [2023-02-16 03:58:20,123 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-16 03:58:20,124 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-02-16 03:58:20,124 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 03:58:20,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-02-16 03:58:20,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=244, Invalid=748, Unknown=0, NotChecked=0, Total=992 [2023-02-16 03:58:20,125 INFO L87 Difference]: Start difference. First operand 13356 states and 48906 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) [2023-02-16 03:58:22,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 03:58:22,526 INFO L93 Difference]: Finished difference Result 20225 states and 73221 transitions. [2023-02-16 03:58:22,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2023-02-16 03:58:22,527 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 [2023-02-16 03:58:22,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 03:58:22,756 INFO L225 Difference]: With dead ends: 20225 [2023-02-16 03:58:22,757 INFO L226 Difference]: Without dead ends: 20224 [2023-02-16 03:58:22,783 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 101 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 704 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1054, Invalid=2368, Unknown=0, NotChecked=0, Total=3422 [2023-02-16 03:58:22,784 INFO L413 NwaCegarLoop]: 51 mSDtfsCounter, 504 mSDsluCounter, 508 mSDsCounter, 0 mSdLazyCounter, 585 mSolverCounterSat, 259 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 508 SdHoareTripleChecker+Valid, 559 SdHoareTripleChecker+Invalid, 844 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 259 IncrementalHoareTripleChecker+Valid, 585 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-02-16 03:58:22,784 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [508 Valid, 559 Invalid, 844 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [259 Valid, 585 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-02-16 03:58:22,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20224 states. [2023-02-16 03:58:25,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20224 to 19840. [2023-02-16 03:58:25,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19840 states, 13022 states have (on average 1.0495315619720473) internal successors, (13667), 13129 states have internal predecessors, (13667), 3917 states have call successors, (3917), 452 states have call predecessors, (3917), 2897 states have return successors, (53631), 6258 states have call predecessors, (53631), 3906 states have call successors, (53631) [2023-02-16 03:58:25,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19840 states to 19840 states and 71215 transitions. [2023-02-16 03:58:25,722 INFO L78 Accepts]: Start accepts. Automaton has 19840 states and 71215 transitions. Word has length 59 [2023-02-16 03:58:25,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 03:58:25,723 INFO L495 AbstractCegarLoop]: Abstraction has 19840 states and 71215 transitions. [2023-02-16 03:58:25,723 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) [2023-02-16 03:58:25,723 INFO L276 IsEmpty]: Start isEmpty. Operand 19840 states and 71215 transitions. [2023-02-16 03:58:25,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2023-02-16 03:58:25,726 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 03:58:25,726 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] [2023-02-16 03:58:25,733 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-02-16 03:58:25,932 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 [2023-02-16 03:58:25,933 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ackermannErr6ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2023-02-16 03:58:25,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 03:58:25,933 INFO L85 PathProgramCache]: Analyzing trace with hash -1727955375, now seen corresponding path program 2 times [2023-02-16 03:58:25,934 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 03:58:25,934 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [739689795] [2023-02-16 03:58:25,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:58:25,934 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 03:58:25,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:58:26,053 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2023-02-16 03:58:26,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:58:26,100 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-02-16 03:58:26,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:58:26,140 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-02-16 03:58:26,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:58:26,167 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-02-16 03:58:26,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:58:26,202 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2023-02-16 03:58:26,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:58:26,232 INFO L134 CoverageAnalysis]: Checked inductivity of 163 backedges. 86 proven. 16 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2023-02-16 03:58:26,232 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 03:58:26,232 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [739689795] [2023-02-16 03:58:26,232 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [739689795] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 03:58:26,233 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [4874411] [2023-02-16 03:58:26,233 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-16 03:58:26,233 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 03:58:26,233 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 03:58:26,234 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) [2023-02-16 03:58:26,238 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-02-16 03:58:26,298 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-16 03:58:26,298 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-16 03:58:26,300 INFO L263 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 19 conjunts are in the unsatisfiable core [2023-02-16 03:58:26,302 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 03:58:26,366 INFO L134 CoverageAnalysis]: Checked inductivity of 163 backedges. 75 proven. 22 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2023-02-16 03:58:26,366 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 03:58:27,351 INFO L134 CoverageAnalysis]: Checked inductivity of 163 backedges. 94 proven. 8 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2023-02-16 03:58:27,352 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [4874411] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 03:58:27,352 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-16 03:58:27,352 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 16] total 32 [2023-02-16 03:58:27,352 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2019995433] [2023-02-16 03:58:27,352 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-16 03:58:27,352 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-02-16 03:58:27,353 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 03:58:27,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-02-16 03:58:27,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=930, Unknown=0, NotChecked=0, Total=1056 [2023-02-16 03:58:27,354 INFO L87 Difference]: Start difference. First operand 19840 states and 71215 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) [2023-02-16 03:58:29,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 03:58:29,424 INFO L93 Difference]: Finished difference Result 30265 states and 111648 transitions. [2023-02-16 03:58:29,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-02-16 03:58:29,425 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 [2023-02-16 03:58:29,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 03:58:29,489 INFO L225 Difference]: With dead ends: 30265 [2023-02-16 03:58:29,490 INFO L226 Difference]: Without dead ends: 12260 [2023-02-16 03:58:29,710 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 156 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 503 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=667, Invalid=2639, Unknown=0, NotChecked=0, Total=3306 [2023-02-16 03:58:29,710 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 159 mSDsluCounter, 260 mSDsCounter, 0 mSdLazyCounter, 573 mSolverCounterSat, 137 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 159 SdHoareTripleChecker+Valid, 298 SdHoareTripleChecker+Invalid, 710 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 137 IncrementalHoareTripleChecker+Valid, 573 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-16 03:58:29,711 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [159 Valid, 298 Invalid, 710 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [137 Valid, 573 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-16 03:58:29,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12260 states. [2023-02-16 03:58:30,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12260 to 11692. [2023-02-16 03:58:30,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11692 states, 8105 states have (on average 1.073781616286243) internal successors, (8703), 8384 states have internal predecessors, (8703), 2284 states have call successors, (2284), 476 states have call predecessors, (2284), 1299 states have return successors, (7789), 2831 states have call predecessors, (7789), 2276 states have call successors, (7789) [2023-02-16 03:58:30,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11692 states to 11692 states and 18776 transitions. [2023-02-16 03:58:30,949 INFO L78 Accepts]: Start accepts. Automaton has 11692 states and 18776 transitions. Word has length 80 [2023-02-16 03:58:30,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 03:58:30,949 INFO L495 AbstractCegarLoop]: Abstraction has 11692 states and 18776 transitions. [2023-02-16 03:58:30,949 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) [2023-02-16 03:58:30,949 INFO L276 IsEmpty]: Start isEmpty. Operand 11692 states and 18776 transitions. [2023-02-16 03:58:30,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2023-02-16 03:58:30,952 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 03:58:30,952 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] [2023-02-16 03:58:30,959 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-02-16 03:58:31,157 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 [2023-02-16 03:58:31,157 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ackermannErr6ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2023-02-16 03:58:31,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 03:58:31,158 INFO L85 PathProgramCache]: Analyzing trace with hash 1935422832, now seen corresponding path program 3 times [2023-02-16 03:58:31,158 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 03:58:31,158 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1313654879] [2023-02-16 03:58:31,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:58:31,158 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 03:58:31,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:58:31,306 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-02-16 03:58:31,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:58:31,332 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-02-16 03:58:31,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:58:31,367 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 62 proven. 77 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-02-16 03:58:31,367 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 03:58:31,367 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1313654879] [2023-02-16 03:58:31,367 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1313654879] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 03:58:31,368 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1114149020] [2023-02-16 03:58:31,368 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-16 03:58:31,368 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 03:58:31,368 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 03:58:31,369 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) [2023-02-16 03:58:31,373 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-02-16 03:58:31,434 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2023-02-16 03:58:31,434 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-16 03:58:31,435 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 17 conjunts are in the unsatisfiable core [2023-02-16 03:58:31,437 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 03:58:31,513 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 60 proven. 79 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-02-16 03:58:31,513 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 03:58:31,862 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 64 proven. 75 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-02-16 03:58:31,862 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1114149020] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 03:58:31,862 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-16 03:58:31,863 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 33 [2023-02-16 03:58:31,863 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1898614881] [2023-02-16 03:58:31,863 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-16 03:58:31,863 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-02-16 03:58:31,864 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 03:58:31,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-02-16 03:58:31,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=949, Unknown=0, NotChecked=0, Total=1122 [2023-02-16 03:58:31,865 INFO L87 Difference]: Start difference. First operand 11692 states and 18776 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) [2023-02-16 03:58:33,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 03:58:33,188 INFO L93 Difference]: Finished difference Result 12447 states and 19918 transitions. [2023-02-16 03:58:33,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-02-16 03:58:33,189 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 [2023-02-16 03:58:33,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 03:58:33,232 INFO L225 Difference]: With dead ends: 12447 [2023-02-16 03:58:33,233 INFO L226 Difference]: Without dead ends: 12446 [2023-02-16 03:58:33,239 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 127 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 464 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=573, Invalid=1977, Unknown=0, NotChecked=0, Total=2550 [2023-02-16 03:58:33,239 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 190 mSDsluCounter, 299 mSDsCounter, 0 mSdLazyCounter, 612 mSolverCounterSat, 152 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 190 SdHoareTripleChecker+Valid, 330 SdHoareTripleChecker+Invalid, 764 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 152 IncrementalHoareTripleChecker+Valid, 612 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-16 03:58:33,240 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [190 Valid, 330 Invalid, 764 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [152 Valid, 612 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-16 03:58:33,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12446 states. [2023-02-16 03:58:34,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12446 to 11800. [2023-02-16 03:58:34,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11800 states, 8177 states have (on average 1.0699523052464228) internal successors, (8749), 8456 states have internal predecessors, (8749), 2284 states have call successors, (2284), 476 states have call predecessors, (2284), 1335 states have return successors, (7883), 2867 states have call predecessors, (7883), 2276 states have call successors, (7883) [2023-02-16 03:58:34,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11800 states to 11800 states and 18916 transitions. [2023-02-16 03:58:34,462 INFO L78 Accepts]: Start accepts. Automaton has 11800 states and 18916 transitions. Word has length 68 [2023-02-16 03:58:34,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 03:58:34,462 INFO L495 AbstractCegarLoop]: Abstraction has 11800 states and 18916 transitions. [2023-02-16 03:58:34,462 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) [2023-02-16 03:58:34,462 INFO L276 IsEmpty]: Start isEmpty. Operand 11800 states and 18916 transitions. [2023-02-16 03:58:34,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2023-02-16 03:58:34,468 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 03:58:34,468 INFO L195 NwaCegarLoop]: trace histogram [12, 8, 7, 6, 6, 6, 6, 6, 6, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2023-02-16 03:58:34,475 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-02-16 03:58:34,672 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 [2023-02-16 03:58:34,673 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2023-02-16 03:58:34,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 03:58:34,673 INFO L85 PathProgramCache]: Analyzing trace with hash -1205417592, now seen corresponding path program 2 times [2023-02-16 03:58:34,673 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 03:58:34,673 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [828424673] [2023-02-16 03:58:34,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:58:34,674 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 03:58:34,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:58:34,729 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2023-02-16 03:58:34,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:58:34,774 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-02-16 03:58:34,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:58:34,812 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-02-16 03:58:34,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:58:34,842 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-02-16 03:58:34,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:58:34,866 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-02-16 03:58:34,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:58:34,869 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2023-02-16 03:58:34,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:58:34,871 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2023-02-16 03:58:34,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:58:34,875 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 137 proven. 28 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2023-02-16 03:58:34,875 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 03:58:34,875 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [828424673] [2023-02-16 03:58:34,875 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [828424673] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 03:58:34,875 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1651834580] [2023-02-16 03:58:34,876 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-16 03:58:34,876 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 03:58:34,876 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 03:58:34,877 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) [2023-02-16 03:58:34,880 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-02-16 03:58:34,960 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-16 03:58:34,961 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-16 03:58:34,962 INFO L263 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 7 conjunts are in the unsatisfiable core [2023-02-16 03:58:34,964 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 03:58:35,026 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 139 proven. 15 refuted. 0 times theorem prover too weak. 146 trivial. 0 not checked. [2023-02-16 03:58:35,027 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 03:58:35,370 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 139 proven. 26 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2023-02-16 03:58:35,370 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1651834580] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 03:58:35,370 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-16 03:58:35,370 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 8] total 14 [2023-02-16 03:58:35,371 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1372608269] [2023-02-16 03:58:35,371 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-16 03:58:35,371 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-02-16 03:58:35,371 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 03:58:35,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-02-16 03:58:35,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2023-02-16 03:58:35,373 INFO L87 Difference]: Start difference. First operand 11800 states and 18916 transitions. Second operand has 14 states, 14 states have (on average 6.0) internal successors, (84), 14 states have internal predecessors, (84), 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) [2023-02-16 03:58:36,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 03:58:36,463 INFO L93 Difference]: Finished difference Result 22584 states and 40813 transitions. [2023-02-16 03:58:36,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-02-16 03:58:36,464 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 6.0) internal successors, (84), 14 states have internal predecessors, (84), 12 states have call successors, (14), 2 states have call predecessors, (14), 7 states have return successors, (14), 6 states have call predecessors, (14), 11 states have call successors, (14) Word has length 105 [2023-02-16 03:58:36,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 03:58:36,523 INFO L225 Difference]: With dead ends: 22584 [2023-02-16 03:58:36,523 INFO L226 Difference]: Without dead ends: 12984 [2023-02-16 03:58:36,581 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 236 GetRequests, 216 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=112, Invalid=230, Unknown=0, NotChecked=0, Total=342 [2023-02-16 03:58:36,582 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 51 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 128 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 154 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 128 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-16 03:58:36,582 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 104 Invalid, 154 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 128 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-16 03:58:36,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12984 states. [2023-02-16 03:58:37,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12984 to 11794. [2023-02-16 03:58:37,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11794 states, 8174 states have (on average 1.0699779789576707) internal successors, (8746), 8453 states have internal predecessors, (8746), 2281 states have call successors, (2281), 476 states have call predecessors, (2281), 1335 states have return successors, (7803), 2864 states have call predecessors, (7803), 2246 states have call successors, (7803) [2023-02-16 03:58:37,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11794 states to 11794 states and 18830 transitions. [2023-02-16 03:58:37,722 INFO L78 Accepts]: Start accepts. Automaton has 11794 states and 18830 transitions. Word has length 105 [2023-02-16 03:58:37,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 03:58:37,723 INFO L495 AbstractCegarLoop]: Abstraction has 11794 states and 18830 transitions. [2023-02-16 03:58:37,723 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 6.0) internal successors, (84), 14 states have internal predecessors, (84), 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) [2023-02-16 03:58:37,723 INFO L276 IsEmpty]: Start isEmpty. Operand 11794 states and 18830 transitions. [2023-02-16 03:58:37,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2023-02-16 03:58:37,728 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 03:58:37,728 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] [2023-02-16 03:58:37,734 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2023-02-16 03:58:37,933 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 [2023-02-16 03:58:37,934 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2023-02-16 03:58:37,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 03:58:37,934 INFO L85 PathProgramCache]: Analyzing trace with hash -1307053986, now seen corresponding path program 3 times [2023-02-16 03:58:37,934 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 03:58:37,934 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [204038774] [2023-02-16 03:58:37,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:58:37,934 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 03:58:37,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:58:38,001 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-02-16 03:58:38,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:58:38,059 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-02-16 03:58:38,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:58:38,098 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-02-16 03:58:38,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:58:38,163 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-02-16 03:58:38,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:58:38,202 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-02-16 03:58:38,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:58:38,222 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-02-16 03:58:38,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:58:38,243 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2023-02-16 03:58:38,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:58:38,247 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2023-02-16 03:58:38,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:58:38,257 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2023-02-16 03:58:38,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:58:38,261 INFO L134 CoverageAnalysis]: Checked inductivity of 266 backedges. 117 proven. 51 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2023-02-16 03:58:38,261 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 03:58:38,262 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [204038774] [2023-02-16 03:58:38,262 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [204038774] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 03:58:38,262 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [278429637] [2023-02-16 03:58:38,262 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-16 03:58:38,262 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 03:58:38,262 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 03:58:38,263 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) [2023-02-16 03:58:38,288 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-02-16 03:58:38,344 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2023-02-16 03:58:38,345 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-16 03:58:38,346 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 12 conjunts are in the unsatisfiable core [2023-02-16 03:58:38,348 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 03:58:38,431 INFO L134 CoverageAnalysis]: Checked inductivity of 266 backedges. 153 proven. 26 refuted. 0 times theorem prover too weak. 87 trivial. 0 not checked. [2023-02-16 03:58:38,431 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 03:58:39,183 INFO L134 CoverageAnalysis]: Checked inductivity of 266 backedges. 123 proven. 57 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2023-02-16 03:58:39,184 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [278429637] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 03:58:39,184 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-16 03:58:39,184 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 11] total 17 [2023-02-16 03:58:39,184 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1080884452] [2023-02-16 03:58:39,184 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-16 03:58:39,186 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-02-16 03:58:39,186 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 03:58:39,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-02-16 03:58:39,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=202, Unknown=0, NotChecked=0, Total=272 [2023-02-16 03:58:39,187 INFO L87 Difference]: Start difference. First operand 11794 states and 18830 transitions. Second operand has 17 states, 17 states have (on average 4.9411764705882355) internal successors, (84), 17 states have internal predecessors, (84), 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) [2023-02-16 03:58:40,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 03:58:40,649 INFO L93 Difference]: Finished difference Result 24299 states and 49196 transitions. [2023-02-16 03:58:40,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-02-16 03:58:40,649 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.9411764705882355) internal successors, (84), 17 states have internal predecessors, (84), 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 [2023-02-16 03:58:40,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 03:58:40,708 INFO L225 Difference]: With dead ends: 24299 [2023-02-16 03:58:40,708 INFO L226 Difference]: Without dead ends: 14733 [2023-02-16 03:58:40,751 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 207 SyntacticMatches, 7 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=124, Invalid=296, Unknown=0, NotChecked=0, Total=420 [2023-02-16 03:58:40,752 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 55 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 193 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 144 SdHoareTripleChecker+Invalid, 227 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 193 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-16 03:58:40,752 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [62 Valid, 144 Invalid, 227 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 193 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-16 03:58:40,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14733 states. [2023-02-16 03:58:41,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14733 to 14372. [2023-02-16 03:58:41,948 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) [2023-02-16 03:58:42,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14372 states to 14372 states and 22786 transitions. [2023-02-16 03:58:42,006 INFO L78 Accepts]: Start accepts. Automaton has 14372 states and 22786 transitions. Word has length 100 [2023-02-16 03:58:42,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 03:58:42,006 INFO L495 AbstractCegarLoop]: Abstraction has 14372 states and 22786 transitions. [2023-02-16 03:58:42,007 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 4.9411764705882355) internal successors, (84), 17 states have internal predecessors, (84), 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) [2023-02-16 03:58:42,007 INFO L276 IsEmpty]: Start isEmpty. Operand 14372 states and 22786 transitions. [2023-02-16 03:58:42,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2023-02-16 03:58:42,013 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 03:58:42,013 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] [2023-02-16 03:58:42,019 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2023-02-16 03:58:42,218 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 [2023-02-16 03:58:42,218 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ackermannErr6ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2023-02-16 03:58:42,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 03:58:42,219 INFO L85 PathProgramCache]: Analyzing trace with hash 1104252262, now seen corresponding path program 3 times [2023-02-16 03:58:42,219 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 03:58:42,219 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1787717259] [2023-02-16 03:58:42,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:58:42,219 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 03:58:42,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:58:42,387 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-02-16 03:58:42,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:58:42,434 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-02-16 03:58:42,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:58:42,568 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-02-16 03:58:42,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:58:42,608 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2023-02-16 03:58:42,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:58:42,643 INFO L134 CoverageAnalysis]: Checked inductivity of 227 backedges. 120 proven. 86 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-02-16 03:58:42,644 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 03:58:42,644 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1787717259] [2023-02-16 03:58:42,644 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1787717259] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 03:58:42,644 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [754979830] [2023-02-16 03:58:42,644 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-16 03:58:42,644 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 03:58:42,644 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 03:58:42,645 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) [2023-02-16 03:58:42,648 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-02-16 03:58:42,726 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2023-02-16 03:58:42,726 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-16 03:58:42,728 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 31 conjunts are in the unsatisfiable core [2023-02-16 03:58:42,729 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 03:58:42,908 INFO L134 CoverageAnalysis]: Checked inductivity of 227 backedges. 113 proven. 41 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2023-02-16 03:58:42,908 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 03:58:43,074 INFO L134 CoverageAnalysis]: Checked inductivity of 227 backedges. 142 proven. 13 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2023-02-16 03:58:43,075 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [754979830] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 03:58:43,075 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-16 03:58:43,075 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 7, 8] total 29 [2023-02-16 03:58:43,075 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2071277545] [2023-02-16 03:58:43,075 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-16 03:58:43,075 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-02-16 03:58:43,075 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 03:58:43,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-02-16 03:58:43,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=723, Unknown=0, NotChecked=0, Total=812 [2023-02-16 03:58:43,076 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) [2023-02-16 03:58:45,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 03:58:45,270 INFO L93 Difference]: Finished difference Result 25330 states and 43230 transitions. [2023-02-16 03:58:45,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2023-02-16 03:58:45,271 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 [2023-02-16 03:58:45,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 03:58:45,337 INFO L225 Difference]: With dead ends: 25330 [2023-02-16 03:58:45,337 INFO L226 Difference]: Without dead ends: 13103 [2023-02-16 03:58:45,432 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 246 GetRequests, 177 SyntacticMatches, 4 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 826 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=983, Invalid=3439, Unknown=0, NotChecked=0, Total=4422 [2023-02-16 03:58:45,433 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 213 mSDsluCounter, 136 mSDsCounter, 0 mSdLazyCounter, 1040 mSolverCounterSat, 208 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 213 SdHoareTripleChecker+Valid, 157 SdHoareTripleChecker+Invalid, 1248 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 208 IncrementalHoareTripleChecker+Valid, 1040 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-02-16 03:58:45,434 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [213 Valid, 157 Invalid, 1248 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [208 Valid, 1040 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-02-16 03:58:45,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13103 states. [2023-02-16 03:58:46,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13103 to 11143. [2023-02-16 03:58:46,395 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) [2023-02-16 03:58:46,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11143 states to 11143 states and 15399 transitions. [2023-02-16 03:58:46,425 INFO L78 Accepts]: Start accepts. Automaton has 11143 states and 15399 transitions. Word has length 87 [2023-02-16 03:58:46,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 03:58:46,426 INFO L495 AbstractCegarLoop]: Abstraction has 11143 states and 15399 transitions. [2023-02-16 03:58:46,426 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) [2023-02-16 03:58:46,426 INFO L276 IsEmpty]: Start isEmpty. Operand 11143 states and 15399 transitions. [2023-02-16 03:58:46,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2023-02-16 03:58:46,430 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 03:58:46,430 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] [2023-02-16 03:58:46,436 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2023-02-16 03:58:46,635 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 [2023-02-16 03:58:46,635 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2023-02-16 03:58:46,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 03:58:46,636 INFO L85 PathProgramCache]: Analyzing trace with hash 1765664819, now seen corresponding path program 4 times [2023-02-16 03:58:46,636 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 03:58:46,636 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2001481645] [2023-02-16 03:58:46,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:58:46,636 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 03:58:46,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:58:46,752 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-02-16 03:58:46,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:58:46,864 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-02-16 03:58:46,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:58:46,922 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-02-16 03:58:46,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:58:46,971 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-02-16 03:58:46,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:58:47,018 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-02-16 03:58:47,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:58:47,054 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2023-02-16 03:58:47,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:58:47,084 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2023-02-16 03:58:47,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:58:47,096 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2023-02-16 03:58:47,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:58:47,107 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 51 proven. 69 refuted. 0 times theorem prover too weak. 101 trivial. 0 not checked. [2023-02-16 03:58:47,108 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 03:58:47,108 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2001481645] [2023-02-16 03:58:47,108 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2001481645] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 03:58:47,108 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [615668685] [2023-02-16 03:58:47,108 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-16 03:58:47,108 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 03:58:47,109 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 03:58:47,110 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) [2023-02-16 03:58:47,112 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-02-16 03:58:47,192 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-16 03:58:47,193 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-16 03:58:47,194 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 27 conjunts are in the unsatisfiable core [2023-02-16 03:58:47,195 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 03:58:47,271 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 34 proven. 71 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2023-02-16 03:58:47,271 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 03:58:48,579 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 42 proven. 93 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2023-02-16 03:58:48,579 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [615668685] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 03:58:48,579 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-16 03:58:48,579 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17, 23] total 42 [2023-02-16 03:58:48,579 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1721821249] [2023-02-16 03:58:48,580 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-16 03:58:48,580 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2023-02-16 03:58:48,580 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 03:58:48,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2023-02-16 03:58:48,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=207, Invalid=1599, Unknown=0, NotChecked=0, Total=1806 [2023-02-16 03:58:48,582 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) [2023-02-16 03:58:53,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 03:58:53,495 INFO L93 Difference]: Finished difference Result 34681 states and 55092 transitions. [2023-02-16 03:58:53,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 143 states. [2023-02-16 03:58:53,495 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 [2023-02-16 03:58:53,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 03:58:53,683 INFO L225 Difference]: With dead ends: 34681 [2023-02-16 03:58:53,683 INFO L226 Difference]: Without dead ends: 33579 [2023-02-16 03:58:53,719 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 356 GetRequests, 177 SyntacticMatches, 0 SemanticMatches, 179 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12258 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=5454, Invalid=27126, Unknown=0, NotChecked=0, Total=32580 [2023-02-16 03:58:53,719 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 284 mSDsluCounter, 214 mSDsCounter, 0 mSdLazyCounter, 1028 mSolverCounterSat, 849 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 295 SdHoareTripleChecker+Valid, 236 SdHoareTripleChecker+Invalid, 1877 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 849 IncrementalHoareTripleChecker+Valid, 1028 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-02-16 03:58:53,720 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [295 Valid, 236 Invalid, 1877 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [849 Valid, 1028 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-02-16 03:58:53,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33579 states. [2023-02-16 03:58:55,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33579 to 21093. [2023-02-16 03:58:56,006 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) [2023-02-16 03:58:56,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21093 states to 21093 states and 32809 transitions. [2023-02-16 03:58:56,102 INFO L78 Accepts]: Start accepts. Automaton has 21093 states and 32809 transitions. Word has length 91 [2023-02-16 03:58:56,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 03:58:56,102 INFO L495 AbstractCegarLoop]: Abstraction has 21093 states and 32809 transitions. [2023-02-16 03:58:56,102 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) [2023-02-16 03:58:56,102 INFO L276 IsEmpty]: Start isEmpty. Operand 21093 states and 32809 transitions. [2023-02-16 03:58:56,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2023-02-16 03:58:56,110 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 03:58:56,110 INFO L195 NwaCegarLoop]: trace histogram [15, 15, 15, 15, 15, 14, 14, 14, 1, 1, 1, 1, 1, 1] [2023-02-16 03:58:56,116 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2023-02-16 03:58:56,314 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 [2023-02-16 03:58:56,314 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ackermannErr6ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2023-02-16 03:58:56,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 03:58:56,315 INFO L85 PathProgramCache]: Analyzing trace with hash 1934326320, now seen corresponding path program 3 times [2023-02-16 03:58:56,315 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 03:58:56,315 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1637628685] [2023-02-16 03:58:56,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:58:56,315 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 03:58:56,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:58:57,029 INFO L134 CoverageAnalysis]: Checked inductivity of 812 backedges. 0 proven. 812 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 03:58:57,029 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 03:58:57,029 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1637628685] [2023-02-16 03:58:57,029 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1637628685] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 03:58:57,030 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [602556635] [2023-02-16 03:58:57,030 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-16 03:58:57,030 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 03:58:57,030 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 03:58:57,031 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) [2023-02-16 03:58:57,034 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-02-16 03:58:57,135 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2023-02-16 03:58:57,135 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-16 03:58:57,136 INFO L263 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 32 conjunts are in the unsatisfiable core [2023-02-16 03:58:57,138 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 03:58:57,287 INFO L134 CoverageAnalysis]: Checked inductivity of 812 backedges. 0 proven. 812 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 03:58:57,288 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 03:58:58,087 INFO L134 CoverageAnalysis]: Checked inductivity of 812 backedges. 0 proven. 812 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 03:58:58,087 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [602556635] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 03:58:58,087 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-16 03:58:58,087 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32, 32] total 63 [2023-02-16 03:58:58,087 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [958096494] [2023-02-16 03:58:58,088 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-16 03:58:58,088 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2023-02-16 03:58:58,088 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 03:58:58,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2023-02-16 03:58:58,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=996, Invalid=3036, Unknown=0, NotChecked=0, Total=4032 [2023-02-16 03:58:58,090 INFO L87 Difference]: Start difference. First operand 21093 states and 32809 transitions. Second operand has 64 states, 61 states have (on average 3.4918032786885247) internal successors, (213), 34 states have internal predecessors, (213), 30 states have call successors, (30), 30 states have call predecessors, (30), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 03:59:02,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 03:59:02,084 INFO L93 Difference]: Finished difference Result 36182 states and 56297 transitions. [2023-02-16 03:59:02,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2023-02-16 03:59:02,085 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 61 states have (on average 3.4918032786885247) internal successors, (213), 34 states have internal predecessors, (213), 30 states have call successors, (30), 30 states have call predecessors, (30), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 123 [2023-02-16 03:59:02,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 03:59:02,224 INFO L225 Difference]: With dead ends: 36182 [2023-02-16 03:59:02,224 INFO L226 Difference]: Without dead ends: 36181 [2023-02-16 03:59:02,251 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 335 GetRequests, 213 SyntacticMatches, 1 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3484 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=4654, Invalid=10352, Unknown=0, NotChecked=0, Total=15006 [2023-02-16 03:59:02,251 INFO L413 NwaCegarLoop]: 83 mSDtfsCounter, 1217 mSDsluCounter, 855 mSDsCounter, 0 mSdLazyCounter, 1260 mSolverCounterSat, 746 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1221 SdHoareTripleChecker+Valid, 938 SdHoareTripleChecker+Invalid, 2006 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 746 IncrementalHoareTripleChecker+Valid, 1260 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-02-16 03:59:02,252 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1221 Valid, 938 Invalid, 2006 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [746 Valid, 1260 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-02-16 03:59:02,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36181 states. [2023-02-16 03:59:05,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36181 to 36181. [2023-02-16 03:59:05,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36181 states, 23422 states have (on average 1.0283067201776108) internal successors, (24085), 23941 states have internal predecessors, (24085), 7326 states have call successors, (7326), 820 states have call predecessors, (7326), 5429 states have return successors, (24870), 11419 states have call predecessors, (24870), 7272 states have call successors, (24870) [2023-02-16 03:59:05,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36181 states to 36181 states and 56281 transitions. [2023-02-16 03:59:05,491 INFO L78 Accepts]: Start accepts. Automaton has 36181 states and 56281 transitions. Word has length 123 [2023-02-16 03:59:05,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 03:59:05,492 INFO L495 AbstractCegarLoop]: Abstraction has 36181 states and 56281 transitions. [2023-02-16 03:59:05,492 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 61 states have (on average 3.4918032786885247) internal successors, (213), 34 states have internal predecessors, (213), 30 states have call successors, (30), 30 states have call predecessors, (30), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 03:59:05,492 INFO L276 IsEmpty]: Start isEmpty. Operand 36181 states and 56281 transitions. [2023-02-16 03:59:05,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2023-02-16 03:59:05,500 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 03:59:05,500 INFO L195 NwaCegarLoop]: trace histogram [20, 20, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1] [2023-02-16 03:59:05,504 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2023-02-16 03:59:05,700 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 [2023-02-16 03:59:05,701 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ackermannErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2023-02-16 03:59:05,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 03:59:05,701 INFO L85 PathProgramCache]: Analyzing trace with hash 951429890, now seen corresponding path program 2 times [2023-02-16 03:59:05,701 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 03:59:05,701 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2075561983] [2023-02-16 03:59:05,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 03:59:05,701 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 03:59:05,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 03:59:06,384 INFO L134 CoverageAnalysis]: Checked inductivity of 894 backedges. 0 proven. 867 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2023-02-16 03:59:06,385 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 03:59:06,385 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2075561983] [2023-02-16 03:59:06,385 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2075561983] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 03:59:06,385 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1953599063] [2023-02-16 03:59:06,385 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-16 03:59:06,385 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 03:59:06,385 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 03:59:06,387 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) [2023-02-16 03:59:06,390 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-02-16 03:59:06,503 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-16 03:59:06,503 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-16 03:59:06,504 INFO L263 TraceCheckSpWp]: Trace formula consists of 342 conjuncts, 42 conjunts are in the unsatisfiable core [2023-02-16 03:59:06,506 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 03:59:06,664 INFO L134 CoverageAnalysis]: Checked inductivity of 894 backedges. 0 proven. 867 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2023-02-16 03:59:06,665 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 03:59:07,159 INFO L134 CoverageAnalysis]: Checked inductivity of 894 backedges. 0 proven. 867 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2023-02-16 03:59:07,159 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1953599063] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 03:59:07,159 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-16 03:59:07,159 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 47 [2023-02-16 03:59:07,159 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1436304580] [2023-02-16 03:59:07,159 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-16 03:59:07,160 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2023-02-16 03:59:07,160 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 03:59:07,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2023-02-16 03:59:07,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=556, Invalid=1700, Unknown=0, NotChecked=0, Total=2256 [2023-02-16 03:59:07,161 INFO L87 Difference]: Start difference. First operand 36181 states and 56281 transitions. Second operand has 48 states, 47 states have (on average 4.340425531914893) internal successors, (204), 26 states have internal predecessors, (204), 22 states have call successors, (40), 22 states have call predecessors, (40), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 03:59:13,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 03:59:13,974 INFO L93 Difference]: Finished difference Result 81606 states and 127883 transitions. [2023-02-16 03:59:13,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2023-02-16 03:59:13,975 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 47 states have (on average 4.340425531914893) internal successors, (204), 26 states have internal predecessors, (204), 22 states have call successors, (40), 22 states have call predecessors, (40), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 141 [2023-02-16 03:59:13,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 03:59:14,304 INFO L225 Difference]: With dead ends: 81606 [2023-02-16 03:59:14,304 INFO L226 Difference]: Without dead ends: 81605 [2023-02-16 03:59:14,340 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 365 GetRequests, 275 SyntacticMatches, 1 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1830 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=2534, Invalid=5656, Unknown=0, NotChecked=0, Total=8190 [2023-02-16 03:59:14,340 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 1701 mSDsluCounter, 540 mSDsCounter, 0 mSdLazyCounter, 973 mSolverCounterSat, 663 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1704 SdHoareTripleChecker+Valid, 567 SdHoareTripleChecker+Invalid, 1636 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 663 IncrementalHoareTripleChecker+Valid, 973 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-02-16 03:59:14,341 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1704 Valid, 567 Invalid, 1636 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [663 Valid, 973 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-02-16 03:59:14,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81605 states.