./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 6c24879c 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-?-6c24879 [2022-07-13 02:09:34,923 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-13 02:09:34,929 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-13 02:09:34,973 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-13 02:09:34,975 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-13 02:09:34,976 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-13 02:09:34,980 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-13 02:09:34,983 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-13 02:09:34,987 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-13 02:09:34,992 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-13 02:09:34,993 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-13 02:09:34,994 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-13 02:09:34,995 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-13 02:09:34,996 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-13 02:09:34,997 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-13 02:09:34,998 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-13 02:09:34,999 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-13 02:09:35,000 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-13 02:09:35,004 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-13 02:09:35,007 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-13 02:09:35,009 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-13 02:09:35,010 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-13 02:09:35,011 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-13 02:09:35,011 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-13 02:09:35,013 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-13 02:09:35,016 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-13 02:09:35,016 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-13 02:09:35,017 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-13 02:09:35,017 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-13 02:09:35,018 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-13 02:09:35,018 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-13 02:09:35,019 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-13 02:09:35,020 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-13 02:09:35,020 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-13 02:09:35,021 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-13 02:09:35,021 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-13 02:09:35,021 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-13 02:09:35,022 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-13 02:09:35,022 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-13 02:09:35,022 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-13 02:09:35,023 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-13 02:09:35,024 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-13 02:09:35,025 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Overflow-32bit-Automizer_Default.epf [2022-07-13 02:09:35,050 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-13 02:09:35,050 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-13 02:09:35,050 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-13 02:09:35,050 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-13 02:09:35,051 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-13 02:09:35,051 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-13 02:09:35,052 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-13 02:09:35,052 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-13 02:09:35,052 INFO L138 SettingsManager]: * Use SBE=true [2022-07-13 02:09:35,053 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-13 02:09:35,053 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-13 02:09:35,053 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-07-13 02:09:35,053 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-13 02:09:35,053 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-13 02:09:35,053 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-13 02:09:35,054 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-13 02:09:35,054 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-13 02:09:35,054 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-13 02:09:35,054 INFO L138 SettingsManager]: * Check absence of signed integer overflows=true [2022-07-13 02:09:35,055 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-13 02:09:35,055 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-13 02:09:35,055 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-13 02:09:35,055 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-13 02:09:35,056 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-13 02:09:35,056 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-13 02:09:35,056 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-13 02:09:35,056 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-13 02:09:35,056 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-13 02:09:35,056 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-13 02:09:35,057 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-13 02:09:35,057 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-13 02:09:35,057 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-13 02:09:35,057 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-13 02:09:35,057 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 85f83c4bcdce9397140788b204098e14e4fa25f5b66f064340f4aaa544fbb462 [2022-07-13 02:09:35,273 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-13 02:09:35,298 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-13 02:09:35,300 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-13 02:09:35,301 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-13 02:09:35,302 INFO L275 PluginConnector]: CDTParser initialized [2022-07-13 02:09:35,303 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/recursive/Ackermann04.c [2022-07-13 02:09:35,364 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/267fcbc2f/635faf7351ae4835b7bf76c5956e7fca/FLAGf7f15042f [2022-07-13 02:09:35,679 INFO L306 CDTParser]: Found 1 translation units. [2022-07-13 02:09:35,680 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursive/Ackermann04.c [2022-07-13 02:09:35,684 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/267fcbc2f/635faf7351ae4835b7bf76c5956e7fca/FLAGf7f15042f [2022-07-13 02:09:35,696 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/267fcbc2f/635faf7351ae4835b7bf76c5956e7fca [2022-07-13 02:09:35,698 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-13 02:09:35,699 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-13 02:09:35,700 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-13 02:09:35,700 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-13 02:09:35,703 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-13 02:09:35,703 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.07 02:09:35" (1/1) ... [2022-07-13 02:09:35,704 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6dcfa0cb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 02:09:35, skipping insertion in model container [2022-07-13 02:09:35,704 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.07 02:09:35" (1/1) ... [2022-07-13 02:09:35,709 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-13 02:09:35,719 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-13 02:09:35,882 WARN L230 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] [2022-07-13 02:09:35,883 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-13 02:09:35,891 INFO L203 MainTranslator]: Completed pre-run [2022-07-13 02:09:35,912 WARN L230 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] [2022-07-13 02:09:35,914 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-13 02:09:35,923 INFO L208 MainTranslator]: Completed translation [2022-07-13 02:09:35,924 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 02:09:35 WrapperNode [2022-07-13 02:09:35,924 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-13 02:09:35,926 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-13 02:09:35,926 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-13 02:09:35,926 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-13 02:09:35,932 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 02:09:35" (1/1) ... [2022-07-13 02:09:35,936 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 02:09:35" (1/1) ... [2022-07-13 02:09:35,947 INFO L137 Inliner]: procedures = 13, calls = 11, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 32 [2022-07-13 02:09:35,947 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-13 02:09:35,948 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-13 02:09:35,948 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-13 02:09:35,949 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-13 02:09:35,954 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 02:09:35" (1/1) ... [2022-07-13 02:09:35,954 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 02:09:35" (1/1) ... [2022-07-13 02:09:35,960 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 02:09:35" (1/1) ... [2022-07-13 02:09:35,960 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 02:09:35" (1/1) ... [2022-07-13 02:09:35,968 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 02:09:35" (1/1) ... [2022-07-13 02:09:35,970 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 02:09:35" (1/1) ... [2022-07-13 02:09:35,973 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 02:09:35" (1/1) ... [2022-07-13 02:09:35,974 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-13 02:09:35,975 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-13 02:09:35,975 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-13 02:09:35,975 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-13 02:09:35,976 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 02:09:35" (1/1) ... [2022-07-13 02:09:35,980 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-13 02:09:35,987 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 02:09:35,997 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) [2022-07-13 02:09:36,024 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 [2022-07-13 02:09:36,034 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-13 02:09:36,034 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-13 02:09:36,034 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-13 02:09:36,034 INFO L130 BoogieDeclarations]: Found specification of procedure ackermann [2022-07-13 02:09:36,034 INFO L138 BoogieDeclarations]: Found implementation of procedure ackermann [2022-07-13 02:09:36,034 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-13 02:09:36,084 INFO L234 CfgBuilder]: Building ICFG [2022-07-13 02:09:36,085 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-13 02:09:36,234 INFO L275 CfgBuilder]: Performing block encoding [2022-07-13 02:09:36,239 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-13 02:09:36,239 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2022-07-13 02:09:36,240 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 02:09:36 BoogieIcfgContainer [2022-07-13 02:09:36,240 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-13 02:09:36,242 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-13 02:09:36,242 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-13 02:09:36,245 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-13 02:09:36,248 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.07 02:09:35" (1/3) ... [2022-07-13 02:09:36,249 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@410ed633 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.07 02:09:36, skipping insertion in model container [2022-07-13 02:09:36,249 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 02:09:35" (2/3) ... [2022-07-13 02:09:36,249 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@410ed633 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.07 02:09:36, skipping insertion in model container [2022-07-13 02:09:36,263 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 02:09:36" (3/3) ... [2022-07-13 02:09:36,264 INFO L111 eAbstractionObserver]: Analyzing ICFG Ackermann04.c [2022-07-13 02:09:36,273 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-13 02:09:36,274 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 8 error locations. [2022-07-13 02:09:36,335 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-13 02:09:36,342 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=FINITE_AUTOMATA, 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=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@364796f0, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@460b11ac [2022-07-13 02:09:36,343 INFO L358 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2022-07-13 02:09:36,347 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) [2022-07-13 02:09:36,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-07-13 02:09:36,355 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 02:09:36,355 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 02:09:36,356 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2022-07-13 02:09:36,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 02:09:36,362 INFO L85 PathProgramCache]: Analyzing trace with hash 180762217, now seen corresponding path program 1 times [2022-07-13 02:09:36,368 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 02:09:36,370 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1877825441] [2022-07-13 02:09:36,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 02:09:36,371 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 02:09:36,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 02:09:36,536 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 02:09:36,537 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 02:09:36,537 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1877825441] [2022-07-13 02:09:36,538 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1877825441] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 02:09:36,538 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 02:09:36,538 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-13 02:09:36,539 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [436960770] [2022-07-13 02:09:36,540 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 02:09:36,543 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-13 02:09:36,543 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 02:09:36,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-13 02:09:36,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-13 02:09:36,567 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) [2022-07-13 02:09:36,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 02:09:36,681 INFO L93 Difference]: Finished difference Result 73 states and 84 transitions. [2022-07-13 02:09:36,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-13 02:09:36,683 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 [2022-07-13 02:09:36,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 02:09:36,691 INFO L225 Difference]: With dead ends: 73 [2022-07-13 02:09:36,692 INFO L226 Difference]: Without dead ends: 59 [2022-07-13 02:09:36,694 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-07-13 02:09:36,699 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 55 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-13 02:09:36,701 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [57 Valid, 119 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-13 02:09:36,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2022-07-13 02:09:36,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 51. [2022-07-13 02:09:36,744 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) [2022-07-13 02:09:36,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 65 transitions. [2022-07-13 02:09:36,752 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 65 transitions. Word has length 8 [2022-07-13 02:09:36,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 02:09:36,752 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 65 transitions. [2022-07-13 02:09:36,753 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) [2022-07-13 02:09:36,753 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 65 transitions. [2022-07-13 02:09:36,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-07-13 02:09:36,754 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 02:09:36,754 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 02:09:36,754 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-13 02:09:36,754 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2022-07-13 02:09:36,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 02:09:36,755 INFO L85 PathProgramCache]: Analyzing trace with hash 1308666490, now seen corresponding path program 1 times [2022-07-13 02:09:36,755 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 02:09:36,755 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [312905265] [2022-07-13 02:09:36,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 02:09:36,756 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 02:09:36,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 02:09:36,843 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 02:09:36,844 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 02:09:36,844 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [312905265] [2022-07-13 02:09:36,845 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [312905265] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 02:09:36,845 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 02:09:36,845 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-13 02:09:36,845 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1120202716] [2022-07-13 02:09:36,846 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 02:09:36,847 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-13 02:09:36,847 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 02:09:36,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-13 02:09:36,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-13 02:09:36,849 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) [2022-07-13 02:09:36,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 02:09:36,911 INFO L93 Difference]: Finished difference Result 51 states and 65 transitions. [2022-07-13 02:09:36,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-13 02:09:36,912 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 [2022-07-13 02:09:36,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 02:09:36,913 INFO L225 Difference]: With dead ends: 51 [2022-07-13 02:09:36,914 INFO L226 Difference]: Without dead ends: 49 [2022-07-13 02:09:36,917 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 [2022-07-13 02:09:36,918 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 43 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 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 [2022-07-13 02:09:36,919 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 45 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 02:09:36,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2022-07-13 02:09:36,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2022-07-13 02:09:36,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 34 states have (on average 1.411764705882353) internal successors, (48), 40 states have internal predecessors, (48), 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) [2022-07-13 02:09:36,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 61 transitions. [2022-07-13 02:09:36,943 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 61 transitions. Word has length 9 [2022-07-13 02:09:36,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 02:09:36,944 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 61 transitions. [2022-07-13 02:09:36,945 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) [2022-07-13 02:09:36,946 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 61 transitions. [2022-07-13 02:09:36,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-07-13 02:09:36,947 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 02:09:36,947 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 02:09:36,947 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-13 02:09:36,948 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2022-07-13 02:09:36,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 02:09:36,949 INFO L85 PathProgramCache]: Analyzing trace with hash 1308661493, now seen corresponding path program 1 times [2022-07-13 02:09:36,949 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 02:09:36,950 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1870865300] [2022-07-13 02:09:36,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 02:09:36,951 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 02:09:36,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 02:09:37,000 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 02:09:37,000 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 02:09:37,001 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1870865300] [2022-07-13 02:09:37,001 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1870865300] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 02:09:37,002 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 02:09:37,002 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-13 02:09:37,002 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [179321821] [2022-07-13 02:09:37,002 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 02:09:37,003 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-13 02:09:37,004 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 02:09:37,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-13 02:09:37,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-13 02:09:37,005 INFO L87 Difference]: Start difference. First operand 49 states and 61 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) [2022-07-13 02:09:37,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 02:09:37,078 INFO L93 Difference]: Finished difference Result 76 states and 96 transitions. [2022-07-13 02:09:37,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-13 02:09:37,078 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 [2022-07-13 02:09:37,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 02:09:37,081 INFO L225 Difference]: With dead ends: 76 [2022-07-13 02:09:37,081 INFO L226 Difference]: Without dead ends: 75 [2022-07-13 02:09:37,083 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 [2022-07-13 02:09:37,087 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 43 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-13 02:09:37,088 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 87 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 02:09:37,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2022-07-13 02:09:37,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 68. [2022-07-13 02:09:37,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 49 states have (on average 1.3877551020408163) internal successors, (68), 55 states have internal predecessors, (68), 10 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-07-13 02:09:37,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 87 transitions. [2022-07-13 02:09:37,110 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 87 transitions. Word has length 9 [2022-07-13 02:09:37,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 02:09:37,110 INFO L495 AbstractCegarLoop]: Abstraction has 68 states and 87 transitions. [2022-07-13 02:09:37,110 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) [2022-07-13 02:09:37,110 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 87 transitions. [2022-07-13 02:09:37,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-07-13 02:09:37,111 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 02:09:37,111 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 02:09:37,111 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-13 02:09:37,112 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ackermannErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2022-07-13 02:09:37,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 02:09:37,112 INFO L85 PathProgramCache]: Analyzing trace with hash 1913955596, now seen corresponding path program 1 times [2022-07-13 02:09:37,112 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 02:09:37,113 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1271976835] [2022-07-13 02:09:37,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 02:09:37,113 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 02:09:37,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 02:09:37,185 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 02:09:37,185 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 02:09:37,185 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1271976835] [2022-07-13 02:09:37,185 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1271976835] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 02:09:37,185 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 02:09:37,185 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-13 02:09:37,185 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [617138205] [2022-07-13 02:09:37,185 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 02:09:37,186 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-13 02:09:37,186 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 02:09:37,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-13 02:09:37,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-13 02:09:37,186 INFO L87 Difference]: Start difference. First operand 68 states and 87 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) [2022-07-13 02:09:37,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 02:09:37,245 INFO L93 Difference]: Finished difference Result 116 states and 156 transitions. [2022-07-13 02:09:37,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-13 02:09:37,245 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 [2022-07-13 02:09:37,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 02:09:37,246 INFO L225 Difference]: With dead ends: 116 [2022-07-13 02:09:37,246 INFO L226 Difference]: Without dead ends: 108 [2022-07-13 02:09:37,246 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 [2022-07-13 02:09:37,247 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 39 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-13 02:09:37,247 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 85 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 02:09:37,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2022-07-13 02:09:37,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 100. [2022-07-13 02:09:37,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 74 states have (on average 1.337837837837838) internal successors, (99), 81 states have internal predecessors, (99), 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) [2022-07-13 02:09:37,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 128 transitions. [2022-07-13 02:09:37,257 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 128 transitions. Word has length 10 [2022-07-13 02:09:37,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 02:09:37,257 INFO L495 AbstractCegarLoop]: Abstraction has 100 states and 128 transitions. [2022-07-13 02:09:37,257 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) [2022-07-13 02:09:37,257 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 128 transitions. [2022-07-13 02:09:37,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-07-13 02:09:37,258 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 02:09:37,258 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 02:09:37,258 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-13 02:09:37,258 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ackermannErr7ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2022-07-13 02:09:37,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 02:09:37,258 INFO L85 PathProgramCache]: Analyzing trace with hash 1072007509, now seen corresponding path program 1 times [2022-07-13 02:09:37,258 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 02:09:37,258 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [794907896] [2022-07-13 02:09:37,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 02:09:37,259 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 02:09:37,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 02:09:37,281 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 02:09:37,281 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 02:09:37,281 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [794907896] [2022-07-13 02:09:37,281 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [794907896] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 02:09:37,281 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 02:09:37,282 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-13 02:09:37,282 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1948384464] [2022-07-13 02:09:37,282 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 02:09:37,282 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-13 02:09:37,282 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 02:09:37,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-13 02:09:37,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-13 02:09:37,283 INFO L87 Difference]: Start difference. First operand 100 states and 128 transitions. Second operand has 5 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 4 states have internal predecessors, (11), 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) [2022-07-13 02:09:37,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 02:09:37,346 INFO L93 Difference]: Finished difference Result 109 states and 140 transitions. [2022-07-13 02:09:37,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-13 02:09:37,347 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 4 states have internal predecessors, (11), 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 12 [2022-07-13 02:09:37,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 02:09:37,348 INFO L225 Difference]: With dead ends: 109 [2022-07-13 02:09:37,348 INFO L226 Difference]: Without dead ends: 108 [2022-07-13 02:09:37,349 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-07-13 02:09:37,349 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 37 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-13 02:09:37,350 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 92 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 02:09:37,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2022-07-13 02:09:37,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 100. [2022-07-13 02:09:37,358 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) [2022-07-13 02:09:37,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 126 transitions. [2022-07-13 02:09:37,359 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 126 transitions. Word has length 12 [2022-07-13 02:09:37,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 02:09:37,359 INFO L495 AbstractCegarLoop]: Abstraction has 100 states and 126 transitions. [2022-07-13 02:09:37,359 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 4 states have internal predecessors, (11), 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) [2022-07-13 02:09:37,359 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 126 transitions. [2022-07-13 02:09:37,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-07-13 02:09:37,360 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 02:09:37,360 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 02:09:37,360 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-13 02:09:37,361 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ackermannErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2022-07-13 02:09:37,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 02:09:37,361 INFO L85 PathProgramCache]: Analyzing trace with hash 219392943, now seen corresponding path program 1 times [2022-07-13 02:09:37,361 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 02:09:37,361 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1851787550] [2022-07-13 02:09:37,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 02:09:37,362 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 02:09:37,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 02:09:37,387 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 02:09:37,387 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 02:09:37,388 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1851787550] [2022-07-13 02:09:37,388 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1851787550] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 02:09:37,388 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 02:09:37,388 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-13 02:09:37,388 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1542845274] [2022-07-13 02:09:37,388 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 02:09:37,389 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-13 02:09:37,389 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 02:09:37,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-13 02:09:37,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-13 02:09:37,390 INFO L87 Difference]: Start difference. First operand 100 states and 126 transitions. Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 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) [2022-07-13 02:09:37,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 02:09:37,427 INFO L93 Difference]: Finished difference Result 174 states and 233 transitions. [2022-07-13 02:09:37,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-13 02:09:37,427 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 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 16 [2022-07-13 02:09:37,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 02:09:37,428 INFO L225 Difference]: With dead ends: 174 [2022-07-13 02:09:37,429 INFO L226 Difference]: Without dead ends: 103 [2022-07-13 02:09:37,430 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-13 02:09:37,430 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 30 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-13 02:09:37,431 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 77 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 02:09:37,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2022-07-13 02:09:37,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 96. [2022-07-13 02:09:37,438 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) [2022-07-13 02:09:37,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 119 transitions. [2022-07-13 02:09:37,439 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 119 transitions. Word has length 16 [2022-07-13 02:09:37,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 02:09:37,439 INFO L495 AbstractCegarLoop]: Abstraction has 96 states and 119 transitions. [2022-07-13 02:09:37,440 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 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) [2022-07-13 02:09:37,440 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 119 transitions. [2022-07-13 02:09:37,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-07-13 02:09:37,440 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 02:09:37,440 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 02:09:37,441 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-07-13 02:09:37,441 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ackermannErr5ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2022-07-13 02:09:37,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 02:09:37,441 INFO L85 PathProgramCache]: Analyzing trace with hash 219399894, now seen corresponding path program 1 times [2022-07-13 02:09:37,442 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 02:09:37,442 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1628089329] [2022-07-13 02:09:37,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 02:09:37,442 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 02:09:37,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 02:09:37,476 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 02:09:37,476 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 02:09:37,476 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1628089329] [2022-07-13 02:09:37,476 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1628089329] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 02:09:37,477 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [322459549] [2022-07-13 02:09:37,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 02:09:37,477 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 02:09:37,477 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 02:09:37,483 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) [2022-07-13 02:09:37,484 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-13 02:09:37,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 02:09:37,510 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-13 02:09:37,513 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 02:09:37,575 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 02:09:37,575 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 02:09:37,630 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 02:09:37,630 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [322459549] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 02:09:37,631 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 02:09:37,631 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 11 [2022-07-13 02:09:37,631 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1466916855] [2022-07-13 02:09:37,632 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 02:09:37,633 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-07-13 02:09:37,633 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 02:09:37,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-07-13 02:09:37,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2022-07-13 02:09:37,634 INFO L87 Difference]: Start difference. First operand 96 states and 119 transitions. Second operand has 12 states, 11 states have (on average 2.3636363636363638) 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) [2022-07-13 02:09:37,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 02:09:37,823 INFO L93 Difference]: Finished difference Result 274 states and 356 transitions. [2022-07-13 02:09:37,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-07-13 02:09:37,824 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.3636363636363638) 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 [2022-07-13 02:09:37,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 02:09:37,825 INFO L225 Difference]: With dead ends: 274 [2022-07-13 02:09:37,826 INFO L226 Difference]: Without dead ends: 272 [2022-07-13 02:09:37,826 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=104, Invalid=238, Unknown=0, NotChecked=0, Total=342 [2022-07-13 02:09:37,827 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 217 mSDsluCounter, 164 mSDsCounter, 0 mSdLazyCounter, 185 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 223 SdHoareTripleChecker+Valid, 193 SdHoareTripleChecker+Invalid, 271 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 185 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-13 02:09:37,827 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [223 Valid, 193 Invalid, 271 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 185 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-13 02:09:37,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2022-07-13 02:09:37,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 236. [2022-07-13 02:09:37,840 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) [2022-07-13 02:09:37,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 299 transitions. [2022-07-13 02:09:37,842 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 299 transitions. Word has length 16 [2022-07-13 02:09:37,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 02:09:37,842 INFO L495 AbstractCegarLoop]: Abstraction has 236 states and 299 transitions. [2022-07-13 02:09:37,843 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.3636363636363638) 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) [2022-07-13 02:09:37,843 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 299 transitions. [2022-07-13 02:09:37,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-07-13 02:09:37,843 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 02:09:37,843 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 02:09:37,863 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-13 02:09:38,060 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 02:09:38,061 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2022-07-13 02:09:38,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 02:09:38,061 INFO L85 PathProgramCache]: Analyzing trace with hash 1162887243, now seen corresponding path program 1 times [2022-07-13 02:09:38,062 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 02:09:38,062 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1789932130] [2022-07-13 02:09:38,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 02:09:38,062 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 02:09:38,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 02:09:38,094 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 02:09:38,094 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 02:09:38,094 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1789932130] [2022-07-13 02:09:38,095 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1789932130] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 02:09:38,095 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1870477621] [2022-07-13 02:09:38,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 02:09:38,095 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 02:09:38,095 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 02:09:38,096 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) [2022-07-13 02:09:38,097 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-13 02:09:38,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 02:09:38,121 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-13 02:09:38,121 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 02:09:38,144 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 02:09:38,144 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-13 02:09:38,144 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1870477621] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 02:09:38,144 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-13 02:09:38,144 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 9 [2022-07-13 02:09:38,145 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1458843209] [2022-07-13 02:09:38,145 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 02:09:38,145 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-13 02:09:38,145 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 02:09:38,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-13 02:09:38,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2022-07-13 02:09:38,146 INFO L87 Difference]: Start difference. First operand 236 states and 299 transitions. Second operand has 5 states, 3 states have (on average 5.0) internal successors, (15), 4 states have internal predecessors, (15), 2 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) [2022-07-13 02:09:38,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 02:09:38,205 INFO L93 Difference]: Finished difference Result 328 states and 437 transitions. [2022-07-13 02:09:38,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-13 02:09:38,205 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 3 states have (on average 5.0) internal successors, (15), 4 states have internal predecessors, (15), 2 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 17 [2022-07-13 02:09:38,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 02:09:38,208 INFO L225 Difference]: With dead ends: 328 [2022-07-13 02:09:38,208 INFO L226 Difference]: Without dead ends: 327 [2022-07-13 02:09:38,208 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2022-07-13 02:09:38,209 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 40 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-13 02:09:38,209 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 100 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 02:09:38,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 327 states. [2022-07-13 02:09:38,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 327 to 293. [2022-07-13 02:09:38,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 293 states, 227 states have (on average 1.2599118942731278) internal successors, (286), 234 states have internal predecessors, (286), 45 states have call successors, (45), 16 states have call predecessors, (45), 15 states have return successors, (42), 42 states have call predecessors, (42), 42 states have call successors, (42) [2022-07-13 02:09:38,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 373 transitions. [2022-07-13 02:09:38,225 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 373 transitions. Word has length 17 [2022-07-13 02:09:38,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 02:09:38,226 INFO L495 AbstractCegarLoop]: Abstraction has 293 states and 373 transitions. [2022-07-13 02:09:38,226 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 3 states have (on average 5.0) internal successors, (15), 4 states have internal predecessors, (15), 2 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) [2022-07-13 02:09:38,226 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 373 transitions. [2022-07-13 02:09:38,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-07-13 02:09:38,227 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 02:09:38,227 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 02:09:38,243 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-13 02:09:38,437 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,SelfDestructingSolverStorable7 [2022-07-13 02:09:38,437 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ackermannErr7ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2022-07-13 02:09:38,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 02:09:38,438 INFO L85 PathProgramCache]: Analyzing trace with hash 523262015, now seen corresponding path program 1 times [2022-07-13 02:09:38,438 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 02:09:38,438 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1382343216] [2022-07-13 02:09:38,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 02:09:38,438 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 02:09:38,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 02:09:38,495 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 02:09:38,498 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 02:09:38,499 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1382343216] [2022-07-13 02:09:38,499 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1382343216] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 02:09:38,499 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [282663234] [2022-07-13 02:09:38,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 02:09:38,499 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 02:09:38,499 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 02:09:38,520 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) [2022-07-13 02:09:38,521 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-13 02:09:38,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 02:09:38,544 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-13 02:09:38,545 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 02:09:38,571 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 02:09:38,571 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 02:09:38,631 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 02:09:38,632 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [282663234] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 02:09:38,632 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 02:09:38,632 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 11 [2022-07-13 02:09:38,632 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [207162350] [2022-07-13 02:09:38,632 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 02:09:38,632 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-07-13 02:09:38,633 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 02:09:38,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-07-13 02:09:38,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2022-07-13 02:09:38,633 INFO L87 Difference]: Start difference. First operand 293 states and 373 transitions. Second operand has 12 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 8 states have internal predecessors, (33), 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) [2022-07-13 02:09:38,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 02:09:38,800 INFO L93 Difference]: Finished difference Result 591 states and 792 transitions. [2022-07-13 02:09:38,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-07-13 02:09:38,801 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 8 states have internal predecessors, (33), 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 20 [2022-07-13 02:09:38,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 02:09:38,803 INFO L225 Difference]: With dead ends: 591 [2022-07-13 02:09:38,803 INFO L226 Difference]: Without dead ends: 590 [2022-07-13 02:09:38,804 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=104, Invalid=238, Unknown=0, NotChecked=0, Total=342 [2022-07-13 02:09:38,804 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 240 mSDsluCounter, 124 mSDsCounter, 0 mSdLazyCounter, 136 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 243 SdHoareTripleChecker+Valid, 157 SdHoareTripleChecker+Invalid, 225 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 136 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-13 02:09:38,804 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [243 Valid, 157 Invalid, 225 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 136 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-13 02:09:38,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 590 states. [2022-07-13 02:09:38,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 590 to 521. [2022-07-13 02:09:38,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 521 states, 407 states have (on average 1.203931203931204) internal successors, (490), 414 states have internal predecessors, (490), 81 states have call successors, (81), 28 states have call predecessors, (81), 27 states have return successors, (78), 78 states have call predecessors, (78), 78 states have call successors, (78) [2022-07-13 02:09:38,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 521 states to 521 states and 649 transitions. [2022-07-13 02:09:38,831 INFO L78 Accepts]: Start accepts. Automaton has 521 states and 649 transitions. Word has length 20 [2022-07-13 02:09:38,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 02:09:38,831 INFO L495 AbstractCegarLoop]: Abstraction has 521 states and 649 transitions. [2022-07-13 02:09:38,831 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 8 states have internal predecessors, (33), 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) [2022-07-13 02:09:38,831 INFO L276 IsEmpty]: Start isEmpty. Operand 521 states and 649 transitions. [2022-07-13 02:09:38,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-07-13 02:09:38,832 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 02:09:38,832 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] [2022-07-13 02:09:38,857 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-07-13 02:09:39,060 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 02:09:39,061 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2022-07-13 02:09:39,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 02:09:39,061 INFO L85 PathProgramCache]: Analyzing trace with hash 1106403678, now seen corresponding path program 1 times [2022-07-13 02:09:39,061 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 02:09:39,061 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [312127400] [2022-07-13 02:09:39,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 02:09:39,062 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 02:09:39,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 02:09:39,084 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-07-13 02:09:39,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 02:09:39,096 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-13 02:09:39,096 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 02:09:39,096 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [312127400] [2022-07-13 02:09:39,097 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [312127400] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 02:09:39,097 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1379275755] [2022-07-13 02:09:39,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 02:09:39,097 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 02:09:39,097 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 02:09:39,111 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) [2022-07-13 02:09:39,112 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-13 02:09:39,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 02:09:39,139 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 10 conjunts are in the unsatisfiable core [2022-07-13 02:09:39,143 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 02:09:39,224 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-13 02:09:39,224 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 02:09:39,328 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-13 02:09:39,328 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1379275755] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 02:09:39,328 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 02:09:39,328 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 19 [2022-07-13 02:09:39,329 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [810988811] [2022-07-13 02:09:39,329 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 02:09:39,329 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-07-13 02:09:39,329 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 02:09:39,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-07-13 02:09:39,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=299, Unknown=0, NotChecked=0, Total=342 [2022-07-13 02:09:39,330 INFO L87 Difference]: Start difference. First operand 521 states and 649 transitions. Second operand has 19 states, 17 states have (on average 3.0588235294117645) internal successors, (52), 16 states have internal predecessors, (52), 8 states have call successors, (9), 4 states have call predecessors, (9), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-13 02:09:39,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 02:09:39,845 INFO L93 Difference]: Finished difference Result 1286 states and 1798 transitions. [2022-07-13 02:09:39,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-07-13 02:09:39,845 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 17 states have (on average 3.0588235294117645) internal successors, (52), 16 states have internal predecessors, (52), 8 states have call successors, (9), 4 states have call predecessors, (9), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 24 [2022-07-13 02:09:39,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 02:09:39,849 INFO L225 Difference]: With dead ends: 1286 [2022-07-13 02:09:39,849 INFO L226 Difference]: Without dead ends: 895 [2022-07-13 02:09:39,852 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=248, Invalid=1012, Unknown=0, NotChecked=0, Total=1260 [2022-07-13 02:09:39,852 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 220 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 437 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 220 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 519 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 437 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-13 02:09:39,853 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [220 Valid, 93 Invalid, 519 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 437 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-13 02:09:39,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 895 states. [2022-07-13 02:09:39,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 895 to 701. [2022-07-13 02:09:39,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 701 states, 547 states have (on average 1.1956124314442413) internal successors, (654), 571 states have internal predecessors, (654), 102 states have call successors, (102), 44 states have call predecessors, (102), 46 states have return successors, (106), 85 states have call predecessors, (106), 78 states have call successors, (106) [2022-07-13 02:09:39,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 701 states to 701 states and 862 transitions. [2022-07-13 02:09:39,895 INFO L78 Accepts]: Start accepts. Automaton has 701 states and 862 transitions. Word has length 24 [2022-07-13 02:09:39,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 02:09:39,895 INFO L495 AbstractCegarLoop]: Abstraction has 701 states and 862 transitions. [2022-07-13 02:09:39,895 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 17 states have (on average 3.0588235294117645) internal successors, (52), 16 states have internal predecessors, (52), 8 states have call successors, (9), 4 states have call predecessors, (9), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-13 02:09:39,896 INFO L276 IsEmpty]: Start isEmpty. Operand 701 states and 862 transitions. [2022-07-13 02:09:39,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-07-13 02:09:39,896 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 02:09:39,897 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 02:09:39,914 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-13 02:09:40,108 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 02:09:40,108 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ackermannErr7ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2022-07-13 02:09:40,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 02:09:40,109 INFO L85 PathProgramCache]: Analyzing trace with hash 1583952330, now seen corresponding path program 1 times [2022-07-13 02:09:40,109 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 02:09:40,109 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1180397260] [2022-07-13 02:09:40,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 02:09:40,109 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 02:09:40,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 02:09:40,175 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-07-13 02:09:40,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 02:09:40,192 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-07-13 02:09:40,192 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 02:09:40,193 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1180397260] [2022-07-13 02:09:40,193 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1180397260] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 02:09:40,193 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1207249124] [2022-07-13 02:09:40,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 02:09:40,193 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 02:09:40,193 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 02:09:40,194 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) [2022-07-13 02:09:40,195 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-13 02:09:40,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 02:09:40,226 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-13 02:09:40,227 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 02:09:40,273 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-13 02:09:40,274 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 02:09:40,350 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-13 02:09:40,350 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1207249124] provided 1 perfect and 1 imperfect interpolant sequences [2022-07-13 02:09:40,350 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-07-13 02:09:40,350 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 6] total 13 [2022-07-13 02:09:40,350 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1815232309] [2022-07-13 02:09:40,350 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 02:09:40,351 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-13 02:09:40,351 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 02:09:40,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-13 02:09:40,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2022-07-13 02:09:40,351 INFO L87 Difference]: Start difference. First operand 701 states and 862 transitions. Second operand has 7 states, 6 states have (on average 4.0) internal successors, (24), 6 states have internal predecessors, (24), 3 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) [2022-07-13 02:09:40,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 02:09:40,530 INFO L93 Difference]: Finished difference Result 776 states and 987 transitions. [2022-07-13 02:09:40,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-13 02:09:40,530 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.0) internal successors, (24), 6 states have internal predecessors, (24), 3 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 28 [2022-07-13 02:09:40,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 02:09:40,533 INFO L225 Difference]: With dead ends: 776 [2022-07-13 02:09:40,533 INFO L226 Difference]: Without dead ends: 775 [2022-07-13 02:09:40,533 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2022-07-13 02:09:40,533 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 65 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 121 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 144 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-13 02:09:40,534 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [71 Valid, 101 Invalid, 144 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 121 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-13 02:09:40,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 775 states. [2022-07-13 02:09:40,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 775 to 722. [2022-07-13 02:09:40,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 722 states, 568 states have (on average 1.1971830985915493) internal successors, (680), 589 states have internal predecessors, (680), 102 states have call successors, (102), 47 states have call predecessors, (102), 46 states have return successors, (106), 85 states have call predecessors, (106), 78 states have call successors, (106) [2022-07-13 02:09:40,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 722 states to 722 states and 888 transitions. [2022-07-13 02:09:40,568 INFO L78 Accepts]: Start accepts. Automaton has 722 states and 888 transitions. Word has length 28 [2022-07-13 02:09:40,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 02:09:40,568 INFO L495 AbstractCegarLoop]: Abstraction has 722 states and 888 transitions. [2022-07-13 02:09:40,568 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 4.0) internal successors, (24), 6 states have internal predecessors, (24), 3 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) [2022-07-13 02:09:40,568 INFO L276 IsEmpty]: Start isEmpty. Operand 722 states and 888 transitions. [2022-07-13 02:09:40,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-07-13 02:09:40,569 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 02:09:40,569 INFO L195 NwaCegarLoop]: trace histogram [4, 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, 1] [2022-07-13 02:09:40,585 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-07-13 02:09:40,785 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,SelfDestructingSolverStorable10 [2022-07-13 02:09:40,785 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2022-07-13 02:09:40,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 02:09:40,785 INFO L85 PathProgramCache]: Analyzing trace with hash 1777813581, now seen corresponding path program 1 times [2022-07-13 02:09:40,786 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 02:09:40,786 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1987497321] [2022-07-13 02:09:40,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 02:09:40,786 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 02:09:40,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 02:09:40,809 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-07-13 02:09:40,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 02:09:40,828 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-07-13 02:09:40,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 02:09:40,864 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-13 02:09:40,865 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 02:09:40,865 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1987497321] [2022-07-13 02:09:40,865 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1987497321] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 02:09:40,865 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2071341012] [2022-07-13 02:09:40,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 02:09:40,865 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 02:09:40,865 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 02:09:40,866 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) [2022-07-13 02:09:40,867 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-13 02:09:40,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 02:09:40,893 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 9 conjunts are in the unsatisfiable core [2022-07-13 02:09:40,894 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 02:09:40,924 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-13 02:09:40,924 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 02:09:41,069 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-13 02:09:41,069 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2071341012] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 02:09:41,070 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 02:09:41,070 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2022-07-13 02:09:41,070 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1720083135] [2022-07-13 02:09:41,070 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 02:09:41,070 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-13 02:09:41,070 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 02:09:41,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-13 02:09:41,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2022-07-13 02:09:41,071 INFO L87 Difference]: Start difference. First operand 722 states and 888 transitions. Second operand has 18 states, 17 states have (on average 2.411764705882353) internal successors, (41), 14 states have internal predecessors, (41), 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) [2022-07-13 02:09:41,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 02:09:41,495 INFO L93 Difference]: Finished difference Result 1150 states and 1701 transitions. [2022-07-13 02:09:41,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-07-13 02:09:41,495 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 2.411764705882353) internal successors, (41), 14 states have internal predecessors, (41), 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 33 [2022-07-13 02:09:41,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 02:09:41,500 INFO L225 Difference]: With dead ends: 1150 [2022-07-13 02:09:41,501 INFO L226 Difference]: Without dead ends: 1148 [2022-07-13 02:09:41,502 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=188, Invalid=682, Unknown=0, NotChecked=0, Total=870 [2022-07-13 02:09:41,503 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 147 mSDsluCounter, 183 mSDsCounter, 0 mSdLazyCounter, 375 mSolverCounterSat, 148 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 147 SdHoareTripleChecker+Valid, 209 SdHoareTripleChecker+Invalid, 523 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 148 IncrementalHoareTripleChecker+Valid, 375 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-13 02:09:41,503 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [147 Valid, 209 Invalid, 523 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [148 Valid, 375 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-13 02:09:41,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1148 states. [2022-07-13 02:09:41,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1148 to 976. [2022-07-13 02:09:41,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 976 states, 736 states have (on average 1.1875) internal successors, (874), 768 states have internal predecessors, (874), 151 states have call successors, (151), 54 states have call predecessors, (151), 83 states have return successors, (294), 153 states have call predecessors, (294), 126 states have call successors, (294) [2022-07-13 02:09:41,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 976 states to 976 states and 1319 transitions. [2022-07-13 02:09:41,574 INFO L78 Accepts]: Start accepts. Automaton has 976 states and 1319 transitions. Word has length 33 [2022-07-13 02:09:41,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 02:09:41,575 INFO L495 AbstractCegarLoop]: Abstraction has 976 states and 1319 transitions. [2022-07-13 02:09:41,575 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 2.411764705882353) internal successors, (41), 14 states have internal predecessors, (41), 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) [2022-07-13 02:09:41,575 INFO L276 IsEmpty]: Start isEmpty. Operand 976 states and 1319 transitions. [2022-07-13 02:09:41,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-07-13 02:09:41,578 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 02:09:41,578 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] [2022-07-13 02:09:41,615 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-07-13 02:09:41,793 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 02:09:41,794 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2022-07-13 02:09:41,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 02:09:41,794 INFO L85 PathProgramCache]: Analyzing trace with hash -722353775, now seen corresponding path program 1 times [2022-07-13 02:09:41,794 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 02:09:41,794 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [94995432] [2022-07-13 02:09:41,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 02:09:41,795 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 02:09:41,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 02:09:41,830 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-07-13 02:09:41,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 02:09:41,843 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-07-13 02:09:41,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 02:09:41,863 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-13 02:09:41,863 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 02:09:41,863 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [94995432] [2022-07-13 02:09:41,864 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [94995432] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 02:09:41,864 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1939980334] [2022-07-13 02:09:41,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 02:09:41,864 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 02:09:41,864 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 02:09:41,865 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) [2022-07-13 02:09:41,866 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-13 02:09:41,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 02:09:41,893 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 9 conjunts are in the unsatisfiable core [2022-07-13 02:09:41,894 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 02:09:41,922 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-13 02:09:41,922 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 02:09:42,061 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-13 02:09:42,061 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1939980334] provided 1 perfect and 1 imperfect interpolant sequences [2022-07-13 02:09:42,061 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-07-13 02:09:42,061 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8, 8] total 17 [2022-07-13 02:09:42,062 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1610148922] [2022-07-13 02:09:42,062 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 02:09:42,062 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-13 02:09:42,062 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 02:09:42,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-13 02:09:42,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2022-07-13 02:09:42,063 INFO L87 Difference]: Start difference. First operand 976 states and 1319 transitions. Second operand has 9 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 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) [2022-07-13 02:09:42,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 02:09:42,257 INFO L93 Difference]: Finished difference Result 1019 states and 1361 transitions. [2022-07-13 02:09:42,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-13 02:09:42,257 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 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 34 [2022-07-13 02:09:42,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 02:09:42,261 INFO L225 Difference]: With dead ends: 1019 [2022-07-13 02:09:42,261 INFO L226 Difference]: Without dead ends: 1018 [2022-07-13 02:09:42,262 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=94, Invalid=506, Unknown=0, NotChecked=0, Total=600 [2022-07-13 02:09:42,262 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 62 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 165 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 194 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 165 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-13 02:09:42,263 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [64 Valid, 127 Invalid, 194 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 165 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-13 02:09:42,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1018 states. [2022-07-13 02:09:42,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1018 to 975. [2022-07-13 02:09:42,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 975 states, 736 states have (on average 1.1766304347826086) internal successors, (866), 767 states have internal predecessors, (866), 151 states have call successors, (151), 54 states have call predecessors, (151), 83 states have return successors, (294), 153 states have call predecessors, (294), 126 states have call successors, (294) [2022-07-13 02:09:42,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 975 states to 975 states and 1311 transitions. [2022-07-13 02:09:42,308 INFO L78 Accepts]: Start accepts. Automaton has 975 states and 1311 transitions. Word has length 34 [2022-07-13 02:09:42,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 02:09:42,309 INFO L495 AbstractCegarLoop]: Abstraction has 975 states and 1311 transitions. [2022-07-13 02:09:42,309 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 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) [2022-07-13 02:09:42,309 INFO L276 IsEmpty]: Start isEmpty. Operand 975 states and 1311 transitions. [2022-07-13 02:09:42,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-07-13 02:09:42,310 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 02:09:42,310 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 02:09:42,341 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-07-13 02:09:42,526 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 02:09:42,526 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ackermannErr7ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2022-07-13 02:09:42,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 02:09:42,527 INFO L85 PathProgramCache]: Analyzing trace with hash -1227703372, now seen corresponding path program 2 times [2022-07-13 02:09:42,527 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 02:09:42,527 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [809469983] [2022-07-13 02:09:42,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 02:09:42,527 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 02:09:42,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 02:09:42,563 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-07-13 02:09:42,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 02:09:42,578 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 2 proven. 18 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-07-13 02:09:42,578 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 02:09:42,578 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [809469983] [2022-07-13 02:09:42,578 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [809469983] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 02:09:42,578 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1580294305] [2022-07-13 02:09:42,578 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-13 02:09:42,578 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 02:09:42,579 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 02:09:42,604 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) [2022-07-13 02:09:42,605 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-07-13 02:09:42,633 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-13 02:09:42,633 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 02:09:42,634 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2022-07-13 02:09:42,635 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 02:09:42,673 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 2 proven. 18 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-07-13 02:09:42,674 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 02:09:42,782 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-07-13 02:09:42,782 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1580294305] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 02:09:42,782 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 02:09:42,782 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-07-13 02:09:42,783 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1785769229] [2022-07-13 02:09:42,783 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 02:09:42,783 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-07-13 02:09:42,783 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 02:09:42,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-07-13 02:09:42,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2022-07-13 02:09:42,784 INFO L87 Difference]: Start difference. First operand 975 states and 1311 transitions. Second operand has 19 states, 16 states have (on average 3.0625) internal successors, (49), 15 states have internal predecessors, (49), 6 states have call successors, (8), 5 states have call predecessors, (8), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-13 02:09:43,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 02:09:43,155 INFO L93 Difference]: Finished difference Result 1182 states and 1575 transitions. [2022-07-13 02:09:43,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-13 02:09:43,155 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 16 states have (on average 3.0625) internal successors, (49), 15 states have internal predecessors, (49), 6 states have call successors, (8), 5 states have call predecessors, (8), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 36 [2022-07-13 02:09:43,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 02:09:43,158 INFO L225 Difference]: With dead ends: 1182 [2022-07-13 02:09:43,159 INFO L226 Difference]: Without dead ends: 1181 [2022-07-13 02:09:43,159 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 65 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=238, Invalid=754, Unknown=0, NotChecked=0, Total=992 [2022-07-13 02:09:43,159 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 210 mSDsluCounter, 156 mSDsCounter, 0 mSdLazyCounter, 274 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 210 SdHoareTripleChecker+Valid, 176 SdHoareTripleChecker+Invalid, 365 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 274 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-13 02:09:43,160 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [210 Valid, 176 Invalid, 365 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 274 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-13 02:09:43,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1181 states. [2022-07-13 02:09:43,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1181 to 1029. [2022-07-13 02:09:43,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1029 states, 779 states have (on average 1.177150192554557) internal successors, (917), 806 states have internal predecessors, (917), 162 states have call successors, (162), 61 states have call predecessors, (162), 83 states have return successors, (294), 161 states have call predecessors, (294), 126 states have call successors, (294) [2022-07-13 02:09:43,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1029 states to 1029 states and 1373 transitions. [2022-07-13 02:09:43,216 INFO L78 Accepts]: Start accepts. Automaton has 1029 states and 1373 transitions. Word has length 36 [2022-07-13 02:09:43,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 02:09:43,216 INFO L495 AbstractCegarLoop]: Abstraction has 1029 states and 1373 transitions. [2022-07-13 02:09:43,216 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 16 states have (on average 3.0625) internal successors, (49), 15 states have internal predecessors, (49), 6 states have call successors, (8), 5 states have call predecessors, (8), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-13 02:09:43,216 INFO L276 IsEmpty]: Start isEmpty. Operand 1029 states and 1373 transitions. [2022-07-13 02:09:43,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-07-13 02:09:43,216 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 02:09:43,217 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 02:09:43,234 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-07-13 02:09:43,434 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,SelfDestructingSolverStorable13 [2022-07-13 02:09:43,435 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ackermannErr7ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2022-07-13 02:09:43,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 02:09:43,435 INFO L85 PathProgramCache]: Analyzing trace with hash -1699542727, now seen corresponding path program 1 times [2022-07-13 02:09:43,435 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 02:09:43,435 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2096807276] [2022-07-13 02:09:43,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 02:09:43,435 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 02:09:43,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 02:09:43,466 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-07-13 02:09:43,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 02:09:43,483 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-07-13 02:09:43,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 02:09:43,506 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 15 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-13 02:09:43,507 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 02:09:43,507 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2096807276] [2022-07-13 02:09:43,507 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2096807276] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 02:09:43,507 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1184416301] [2022-07-13 02:09:43,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 02:09:43,507 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 02:09:43,507 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 02:09:43,508 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) [2022-07-13 02:09:43,509 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-07-13 02:09:43,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 02:09:43,537 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 9 conjunts are in the unsatisfiable core [2022-07-13 02:09:43,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 02:09:43,584 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 13 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-13 02:09:43,584 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 02:09:43,724 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-13 02:09:43,725 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1184416301] provided 1 perfect and 1 imperfect interpolant sequences [2022-07-13 02:09:43,725 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-07-13 02:09:43,725 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8, 8] total 17 [2022-07-13 02:09:43,725 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [719020739] [2022-07-13 02:09:43,725 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 02:09:43,725 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-13 02:09:43,725 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 02:09:43,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-13 02:09:43,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2022-07-13 02:09:43,726 INFO L87 Difference]: Start difference. First operand 1029 states and 1373 transitions. Second operand has 9 states, 8 states have (on average 3.625) internal successors, (29), 7 states have internal predecessors, (29), 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) [2022-07-13 02:09:43,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 02:09:43,941 INFO L93 Difference]: Finished difference Result 1140 states and 1577 transitions. [2022-07-13 02:09:43,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-13 02:09:43,942 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 3.625) internal successors, (29), 7 states have internal predecessors, (29), 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 37 [2022-07-13 02:09:43,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 02:09:43,945 INFO L225 Difference]: With dead ends: 1140 [2022-07-13 02:09:43,946 INFO L226 Difference]: Without dead ends: 1139 [2022-07-13 02:09:43,946 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=100, Invalid=550, Unknown=0, NotChecked=0, Total=650 [2022-07-13 02:09:43,947 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 65 mSDsluCounter, 126 mSDsCounter, 0 mSdLazyCounter, 201 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 159 SdHoareTripleChecker+Invalid, 249 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 201 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-13 02:09:43,947 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [71 Valid, 159 Invalid, 249 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 201 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-13 02:09:43,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1139 states. [2022-07-13 02:09:44,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1139 to 1037. [2022-07-13 02:09:44,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1037 states, 787 states have (on average 1.1715374841168995) internal successors, (922), 810 states have internal predecessors, (922), 166 states have call successors, (166), 61 states have call predecessors, (166), 79 states have return successors, (234), 165 states have call predecessors, (234), 130 states have call successors, (234) [2022-07-13 02:09:44,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1037 states to 1037 states and 1322 transitions. [2022-07-13 02:09:44,012 INFO L78 Accepts]: Start accepts. Automaton has 1037 states and 1322 transitions. Word has length 37 [2022-07-13 02:09:44,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 02:09:44,013 INFO L495 AbstractCegarLoop]: Abstraction has 1037 states and 1322 transitions. [2022-07-13 02:09:44,013 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 3.625) internal successors, (29), 7 states have internal predecessors, (29), 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) [2022-07-13 02:09:44,013 INFO L276 IsEmpty]: Start isEmpty. Operand 1037 states and 1322 transitions. [2022-07-13 02:09:44,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-07-13 02:09:44,014 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 02:09:44,014 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1] [2022-07-13 02:09:44,030 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-07-13 02:09:44,227 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,SelfDestructingSolverStorable14 [2022-07-13 02:09:44,227 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ackermannErr7ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2022-07-13 02:09:44,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 02:09:44,228 INFO L85 PathProgramCache]: Analyzing trace with hash -151680771, now seen corresponding path program 2 times [2022-07-13 02:09:44,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 02:09:44,228 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1294637313] [2022-07-13 02:09:44,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 02:09:44,228 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 02:09:44,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 02:09:44,299 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 02:09:44,299 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 02:09:44,300 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1294637313] [2022-07-13 02:09:44,300 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1294637313] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 02:09:44,300 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1038477364] [2022-07-13 02:09:44,300 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-13 02:09:44,300 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 02:09:44,300 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 02:09:44,301 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) [2022-07-13 02:09:44,327 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-07-13 02:09:44,332 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-13 02:09:44,332 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 02:09:44,333 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 12 conjunts are in the unsatisfiable core [2022-07-13 02:09:44,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 02:09:44,382 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 02:09:44,382 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 02:09:44,511 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 02:09:44,512 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1038477364] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 02:09:44,512 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 02:09:44,512 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 23 [2022-07-13 02:09:44,512 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1235160476] [2022-07-13 02:09:44,512 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 02:09:44,512 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-07-13 02:09:44,512 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 02:09:44,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-07-13 02:09:44,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=416, Unknown=0, NotChecked=0, Total=552 [2022-07-13 02:09:44,513 INFO L87 Difference]: Start difference. First operand 1037 states and 1322 transitions. Second operand has 24 states, 21 states have (on average 3.5714285714285716) internal successors, (75), 14 states have internal predecessors, (75), 10 states have call successors, (10), 10 states have call predecessors, (10), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 02:09:45,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 02:09:45,027 INFO L93 Difference]: Finished difference Result 2055 states and 2762 transitions. [2022-07-13 02:09:45,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-07-13 02:09:45,028 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 21 states have (on average 3.5714285714285716) internal successors, (75), 14 states have internal predecessors, (75), 10 states have call successors, (10), 10 states have call predecessors, (10), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2022-07-13 02:09:45,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 02:09:45,034 INFO L225 Difference]: With dead ends: 2055 [2022-07-13 02:09:45,034 INFO L226 Difference]: Without dead ends: 2054 [2022-07-13 02:09:45,035 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 76 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 339 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=554, Invalid=1252, Unknown=0, NotChecked=0, Total=1806 [2022-07-13 02:09:45,035 INFO L413 NwaCegarLoop]: 47 mSDtfsCounter, 418 mSDsluCounter, 466 mSDsCounter, 0 mSdLazyCounter, 520 mSolverCounterSat, 136 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 421 SdHoareTripleChecker+Valid, 513 SdHoareTripleChecker+Invalid, 656 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 136 IncrementalHoareTripleChecker+Valid, 520 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-13 02:09:45,036 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [421 Valid, 513 Invalid, 656 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [136 Valid, 520 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-13 02:09:45,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2054 states. [2022-07-13 02:09:45,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2054 to 1759. [2022-07-13 02:09:45,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1759 states, 1326 states have (on average 1.1463046757164403) internal successors, (1520), 1378 states have internal predecessors, (1520), 274 states have call successors, (274), 95 states have call predecessors, (274), 154 states have return successors, (409), 285 states have call predecessors, (409), 226 states have call successors, (409) [2022-07-13 02:09:45,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1759 states to 1759 states and 2203 transitions. [2022-07-13 02:09:45,132 INFO L78 Accepts]: Start accepts. Automaton has 1759 states and 2203 transitions. Word has length 44 [2022-07-13 02:09:45,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 02:09:45,132 INFO L495 AbstractCegarLoop]: Abstraction has 1759 states and 2203 transitions. [2022-07-13 02:09:45,132 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 21 states have (on average 3.5714285714285716) internal successors, (75), 14 states have internal predecessors, (75), 10 states have call successors, (10), 10 states have call predecessors, (10), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 02:09:45,132 INFO L276 IsEmpty]: Start isEmpty. Operand 1759 states and 2203 transitions. [2022-07-13 02:09:45,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-07-13 02:09:45,133 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 02:09:45,133 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 02:09:45,165 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-07-13 02:09:45,349 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,SelfDestructingSolverStorable15 [2022-07-13 02:09:45,349 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ackermannErr7ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2022-07-13 02:09:45,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 02:09:45,350 INFO L85 PathProgramCache]: Analyzing trace with hash 1560392739, now seen corresponding path program 2 times [2022-07-13 02:09:45,350 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 02:09:45,350 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [450598815] [2022-07-13 02:09:45,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 02:09:45,350 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 02:09:45,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 02:09:45,381 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-07-13 02:09:45,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 02:09:45,395 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-07-13 02:09:45,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 02:09:45,419 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 27 proven. 9 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-13 02:09:45,419 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 02:09:45,419 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [450598815] [2022-07-13 02:09:45,419 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [450598815] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 02:09:45,419 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [261354928] [2022-07-13 02:09:45,420 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-13 02:09:45,420 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 02:09:45,420 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 02:09:45,421 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) [2022-07-13 02:09:45,422 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-07-13 02:09:45,451 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-13 02:09:45,452 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 02:09:45,452 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 11 conjunts are in the unsatisfiable core [2022-07-13 02:09:45,453 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 02:09:45,502 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 25 proven. 11 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-13 02:09:45,502 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 02:09:45,662 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 29 proven. 7 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-13 02:09:45,662 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [261354928] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 02:09:45,662 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 02:09:45,662 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 21 [2022-07-13 02:09:45,662 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [164021458] [2022-07-13 02:09:45,662 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 02:09:45,663 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-07-13 02:09:45,663 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 02:09:45,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-07-13 02:09:45,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2022-07-13 02:09:45,663 INFO L87 Difference]: Start difference. First operand 1759 states and 2203 transitions. Second operand has 22 states, 21 states have (on average 3.0) internal successors, (63), 16 states have internal predecessors, (63), 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) [2022-07-13 02:09:46,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 02:09:46,655 INFO L93 Difference]: Finished difference Result 3798 states and 5493 transitions. [2022-07-13 02:09:46,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-07-13 02:09:46,656 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 3.0) internal successors, (63), 16 states have internal predecessors, (63), 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 45 [2022-07-13 02:09:46,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 02:09:46,666 INFO L225 Difference]: With dead ends: 3798 [2022-07-13 02:09:46,666 INFO L226 Difference]: Without dead ends: 2636 [2022-07-13 02:09:46,671 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 486 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=582, Invalid=1968, Unknown=0, NotChecked=0, Total=2550 [2022-07-13 02:09:46,671 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 230 mSDsluCounter, 279 mSDsCounter, 0 mSdLazyCounter, 675 mSolverCounterSat, 346 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 230 SdHoareTripleChecker+Valid, 315 SdHoareTripleChecker+Invalid, 1021 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 346 IncrementalHoareTripleChecker+Valid, 675 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-13 02:09:46,672 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [230 Valid, 315 Invalid, 1021 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [346 Valid, 675 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-13 02:09:46,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2636 states. [2022-07-13 02:09:46,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2636 to 1939. [2022-07-13 02:09:46,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1939 states, 1464 states have (on average 1.1400273224043715) internal successors, (1669), 1522 states have internal predecessors, (1669), 298 states have call successors, (298), 109 states have call predecessors, (298), 172 states have return successors, (443), 307 states have call predecessors, (443), 245 states have call successors, (443) [2022-07-13 02:09:46,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1939 states to 1939 states and 2410 transitions. [2022-07-13 02:09:46,822 INFO L78 Accepts]: Start accepts. Automaton has 1939 states and 2410 transitions. Word has length 45 [2022-07-13 02:09:46,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 02:09:46,822 INFO L495 AbstractCegarLoop]: Abstraction has 1939 states and 2410 transitions. [2022-07-13 02:09:46,822 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 3.0) internal successors, (63), 16 states have internal predecessors, (63), 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) [2022-07-13 02:09:46,823 INFO L276 IsEmpty]: Start isEmpty. Operand 1939 states and 2410 transitions. [2022-07-13 02:09:46,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-07-13 02:09:46,824 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 02:09:46,824 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 02:09:46,842 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-07-13 02:09:47,040 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,SelfDestructingSolverStorable16 [2022-07-13 02:09:47,040 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ackermannErr5ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2022-07-13 02:09:47,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 02:09:47,040 INFO L85 PathProgramCache]: Analyzing trace with hash -242379077, now seen corresponding path program 1 times [2022-07-13 02:09:47,040 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 02:09:47,041 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [431717697] [2022-07-13 02:09:47,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 02:09:47,041 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 02:09:47,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 02:09:47,071 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-07-13 02:09:47,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 02:09:47,085 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 40 proven. 5 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-07-13 02:09:47,085 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 02:09:47,085 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [431717697] [2022-07-13 02:09:47,085 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [431717697] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 02:09:47,085 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [14952466] [2022-07-13 02:09:47,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 02:09:47,085 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 02:09:47,086 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 02:09:47,097 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) [2022-07-13 02:09:47,125 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-07-13 02:09:47,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 02:09:47,134 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 9 conjunts are in the unsatisfiable core [2022-07-13 02:09:47,135 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 02:09:47,186 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 54 proven. 3 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-07-13 02:09:47,186 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 02:09:47,250 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 55 proven. 2 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-07-13 02:09:47,251 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [14952466] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 02:09:47,251 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 02:09:47,251 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 16 [2022-07-13 02:09:47,251 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [495418946] [2022-07-13 02:09:47,251 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 02:09:47,251 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-07-13 02:09:47,251 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 02:09:47,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-07-13 02:09:47,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2022-07-13 02:09:47,252 INFO L87 Difference]: Start difference. First operand 1939 states and 2410 transitions. Second operand has 16 states, 16 states have (on average 3.5) internal successors, (56), 13 states have internal predecessors, (56), 6 states have call successors, (9), 5 states have call predecessors, (9), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-13 02:09:47,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 02:09:47,825 INFO L93 Difference]: Finished difference Result 2482 states and 3263 transitions. [2022-07-13 02:09:47,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-07-13 02:09:47,825 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.5) internal successors, (56), 13 states have internal predecessors, (56), 6 states have call successors, (9), 5 states have call predecessors, (9), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 52 [2022-07-13 02:09:47,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 02:09:47,833 INFO L225 Difference]: With dead ends: 2482 [2022-07-13 02:09:47,833 INFO L226 Difference]: Without dead ends: 2379 [2022-07-13 02:09:47,834 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 97 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 227 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=334, Invalid=926, Unknown=0, NotChecked=0, Total=1260 [2022-07-13 02:09:47,834 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 189 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 438 mSolverCounterSat, 151 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 189 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 589 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 151 IncrementalHoareTripleChecker+Valid, 438 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-13 02:09:47,835 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [189 Valid, 80 Invalid, 589 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [151 Valid, 438 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-13 02:09:47,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2379 states. [2022-07-13 02:09:47,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2379 to 1873. [2022-07-13 02:09:47,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1873 states, 1411 states have (on average 1.133238837703756) internal successors, (1599), 1473 states have internal predecessors, (1599), 286 states have call successors, (286), 102 states have call predecessors, (286), 172 states have return successors, (443), 297 states have call predecessors, (443), 245 states have call successors, (443) [2022-07-13 02:09:47,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1873 states to 1873 states and 2328 transitions. [2022-07-13 02:09:47,956 INFO L78 Accepts]: Start accepts. Automaton has 1873 states and 2328 transitions. Word has length 52 [2022-07-13 02:09:47,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 02:09:47,956 INFO L495 AbstractCegarLoop]: Abstraction has 1873 states and 2328 transitions. [2022-07-13 02:09:47,956 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.5) internal successors, (56), 13 states have internal predecessors, (56), 6 states have call successors, (9), 5 states have call predecessors, (9), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-13 02:09:47,956 INFO L276 IsEmpty]: Start isEmpty. Operand 1873 states and 2328 transitions. [2022-07-13 02:09:47,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-07-13 02:09:47,958 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 02:09:47,958 INFO L195 NwaCegarLoop]: trace histogram [6, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 02:09:47,991 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-07-13 02:09:48,171 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,SelfDestructingSolverStorable17 [2022-07-13 02:09:48,172 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2022-07-13 02:09:48,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 02:09:48,173 INFO L85 PathProgramCache]: Analyzing trace with hash 442862615, now seen corresponding path program 1 times [2022-07-13 02:09:48,173 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 02:09:48,173 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1860316349] [2022-07-13 02:09:48,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 02:09:48,173 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 02:09:48,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 02:09:48,195 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-07-13 02:09:48,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 02:09:48,214 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-13 02:09:48,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 02:09:48,228 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-07-13 02:09:48,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 02:09:48,257 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-07-13 02:09:48,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 02:09:48,283 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 21 proven. 14 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-07-13 02:09:48,283 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 02:09:48,283 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1860316349] [2022-07-13 02:09:48,283 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1860316349] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 02:09:48,284 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [623850948] [2022-07-13 02:09:48,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 02:09:48,284 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 02:09:48,284 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 02:09:48,286 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) [2022-07-13 02:09:48,287 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-07-13 02:09:48,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 02:09:48,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 15 conjunts are in the unsatisfiable core [2022-07-13 02:09:48,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 02:09:48,365 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 14 proven. 16 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-07-13 02:09:48,365 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 02:09:48,710 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 18 proven. 17 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-07-13 02:09:48,710 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [623850948] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 02:09:48,710 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 02:09:48,710 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 13] total 26 [2022-07-13 02:09:48,710 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1504059865] [2022-07-13 02:09:48,710 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 02:09:48,711 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-07-13 02:09:48,711 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 02:09:48,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-07-13 02:09:48,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=614, Unknown=0, NotChecked=0, Total=702 [2022-07-13 02:09:48,712 INFO L87 Difference]: Start difference. First operand 1873 states and 2328 transitions. Second operand has 27 states, 26 states have (on average 2.1538461538461537) internal successors, (56), 21 states have internal predecessors, (56), 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) [2022-07-13 02:09:49,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 02:09:49,999 INFO L93 Difference]: Finished difference Result 4363 states and 7674 transitions. [2022-07-13 02:09:49,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-07-13 02:09:49,999 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 2.1538461538461537) internal successors, (56), 21 states have internal predecessors, (56), 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 52 [2022-07-13 02:09:49,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 02:09:50,022 INFO L225 Difference]: With dead ends: 4363 [2022-07-13 02:09:50,022 INFO L226 Difference]: Without dead ends: 4361 [2022-07-13 02:09:50,025 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1673 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1154, Invalid=5008, Unknown=0, NotChecked=0, Total=6162 [2022-07-13 02:09:50,025 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 171 mSDsluCounter, 194 mSDsCounter, 0 mSdLazyCounter, 727 mSolverCounterSat, 522 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 183 SdHoareTripleChecker+Valid, 219 SdHoareTripleChecker+Invalid, 1249 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 522 IncrementalHoareTripleChecker+Valid, 727 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-13 02:09:50,025 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [183 Valid, 219 Invalid, 1249 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [522 Valid, 727 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-13 02:09:50,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4361 states. [2022-07-13 02:09:50,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4361 to 3183. [2022-07-13 02:09:50,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3183 states, 2230 states have (on average 1.1031390134529149) internal successors, (2460), 2295 states have internal predecessors, (2460), 551 states have call successors, (551), 116 states have call predecessors, (551), 398 states have return successors, (3128), 771 states have call predecessors, (3128), 508 states have call successors, (3128) [2022-07-13 02:09:50,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3183 states to 3183 states and 6139 transitions. [2022-07-13 02:09:50,254 INFO L78 Accepts]: Start accepts. Automaton has 3183 states and 6139 transitions. Word has length 52 [2022-07-13 02:09:50,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 02:09:50,254 INFO L495 AbstractCegarLoop]: Abstraction has 3183 states and 6139 transitions. [2022-07-13 02:09:50,254 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 2.1538461538461537) internal successors, (56), 21 states have internal predecessors, (56), 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) [2022-07-13 02:09:50,254 INFO L276 IsEmpty]: Start isEmpty. Operand 3183 states and 6139 transitions. [2022-07-13 02:09:50,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-07-13 02:09:50,255 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 02:09:50,256 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 02:09:50,288 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-07-13 02:09:50,471 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 02:09:50,472 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ackermannErr7ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2022-07-13 02:09:50,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 02:09:50,472 INFO L85 PathProgramCache]: Analyzing trace with hash -1812635000, now seen corresponding path program 3 times [2022-07-13 02:09:50,472 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 02:09:50,473 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [59480288] [2022-07-13 02:09:50,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 02:09:50,473 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 02:09:50,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 02:09:50,538 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-07-13 02:09:50,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 02:09:50,560 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 3 proven. 75 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-07-13 02:09:50,560 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 02:09:50,560 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [59480288] [2022-07-13 02:09:50,560 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [59480288] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 02:09:50,561 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1254166506] [2022-07-13 02:09:50,561 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-13 02:09:50,561 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 02:09:50,561 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 02:09:50,562 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) [2022-07-13 02:09:50,563 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-07-13 02:09:50,604 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-07-13 02:09:50,605 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 02:09:50,605 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 16 conjunts are in the unsatisfiable core [2022-07-13 02:09:50,607 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 02:09:50,668 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 3 proven. 75 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-07-13 02:09:50,668 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 02:09:50,864 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 5 proven. 73 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-07-13 02:09:50,865 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1254166506] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 02:09:50,865 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 02:09:50,865 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 26 [2022-07-13 02:09:50,865 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1050240925] [2022-07-13 02:09:50,865 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 02:09:50,865 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-07-13 02:09:50,865 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 02:09:50,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-07-13 02:09:50,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=582, Unknown=0, NotChecked=0, Total=702 [2022-07-13 02:09:50,866 INFO L87 Difference]: Start difference. First operand 3183 states and 6139 transitions. Second operand has 27 states, 24 states have (on average 3.2083333333333335) internal successors, (77), 19 states have internal predecessors, (77), 10 states have call successors, (12), 9 states have call predecessors, (12), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-13 02:09:51,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 02:09:51,533 INFO L93 Difference]: Finished difference Result 3643 states and 6775 transitions. [2022-07-13 02:09:51,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-07-13 02:09:51,534 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 24 states have (on average 3.2083333333333335) internal successors, (77), 19 states have internal predecessors, (77), 10 states have call successors, (12), 9 states have call predecessors, (12), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 52 [2022-07-13 02:09:51,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 02:09:51,552 INFO L225 Difference]: With dead ends: 3643 [2022-07-13 02:09:51,552 INFO L226 Difference]: Without dead ends: 3642 [2022-07-13 02:09:51,554 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 93 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 488 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=634, Invalid=1916, Unknown=0, NotChecked=0, Total=2550 [2022-07-13 02:09:51,555 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 398 mSDsluCounter, 177 mSDsCounter, 0 mSdLazyCounter, 356 mSolverCounterSat, 167 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 398 SdHoareTripleChecker+Valid, 196 SdHoareTripleChecker+Invalid, 523 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 167 IncrementalHoareTripleChecker+Valid, 356 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-13 02:09:51,555 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [398 Valid, 196 Invalid, 523 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [167 Valid, 356 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-13 02:09:51,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3642 states. [2022-07-13 02:09:51,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3642 to 3211. [2022-07-13 02:09:51,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3211 states, 2253 states have (on average 1.1034176653351087) internal successors, (2486), 2318 states have internal predecessors, (2486), 556 states have call successors, (556), 119 states have call predecessors, (556), 398 states have return successors, (3128), 773 states have call predecessors, (3128), 508 states have call successors, (3128) [2022-07-13 02:09:51,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3211 states to 3211 states and 6170 transitions. [2022-07-13 02:09:51,824 INFO L78 Accepts]: Start accepts. Automaton has 3211 states and 6170 transitions. Word has length 52 [2022-07-13 02:09:51,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 02:09:51,825 INFO L495 AbstractCegarLoop]: Abstraction has 3211 states and 6170 transitions. [2022-07-13 02:09:51,825 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 24 states have (on average 3.2083333333333335) internal successors, (77), 19 states have internal predecessors, (77), 10 states have call successors, (12), 9 states have call predecessors, (12), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-13 02:09:51,825 INFO L276 IsEmpty]: Start isEmpty. Operand 3211 states and 6170 transitions. [2022-07-13 02:09:51,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-07-13 02:09:51,827 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 02:09:51,827 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1] [2022-07-13 02:09:51,845 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-07-13 02:09:52,043 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 02:09:52,043 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ackermannErr5ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2022-07-13 02:09:52,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 02:09:52,044 INFO L85 PathProgramCache]: Analyzing trace with hash -1991697283, now seen corresponding path program 1 times [2022-07-13 02:09:52,044 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 02:09:52,044 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [778249816] [2022-07-13 02:09:52,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 02:09:52,044 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 02:09:52,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 02:09:52,118 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 0 proven. 114 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-13 02:09:52,119 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 02:09:52,119 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [778249816] [2022-07-13 02:09:52,119 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [778249816] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 02:09:52,119 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [922644108] [2022-07-13 02:09:52,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 02:09:52,119 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 02:09:52,119 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 02:09:52,120 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) [2022-07-13 02:09:52,122 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-07-13 02:09:52,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 02:09:52,188 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 18 conjunts are in the unsatisfiable core [2022-07-13 02:09:52,189 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 02:09:52,241 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 0 proven. 114 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-13 02:09:52,241 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 02:09:52,401 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 0 proven. 114 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-13 02:09:52,401 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [922644108] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 02:09:52,401 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 02:09:52,401 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 23 [2022-07-13 02:09:52,401 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [378612764] [2022-07-13 02:09:52,401 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 02:09:52,403 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-07-13 02:09:52,403 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 02:09:52,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-07-13 02:09:52,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=416, Unknown=0, NotChecked=0, Total=552 [2022-07-13 02:09:52,403 INFO L87 Difference]: Start difference. First operand 3211 states and 6170 transitions. Second operand has 24 states, 23 states have (on average 3.739130434782609) internal successors, (86), 14 states have internal predecessors, (86), 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) [2022-07-13 02:09:53,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 02:09:53,360 INFO L93 Difference]: Finished difference Result 9377 states and 17636 transitions. [2022-07-13 02:09:53,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-07-13 02:09:53,360 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 3.739130434782609) internal successors, (86), 14 states have internal predecessors, (86), 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 58 [2022-07-13 02:09:53,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 02:09:53,419 INFO L225 Difference]: With dead ends: 9377 [2022-07-13 02:09:53,419 INFO L226 Difference]: Without dead ends: 9376 [2022-07-13 02:09:53,425 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 109 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 339 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=554, Invalid=1252, Unknown=0, NotChecked=0, Total=1806 [2022-07-13 02:09:53,425 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 676 mSDsluCounter, 284 mSDsCounter, 0 mSdLazyCounter, 437 mSolverCounterSat, 286 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 682 SdHoareTripleChecker+Valid, 314 SdHoareTripleChecker+Invalid, 723 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 286 IncrementalHoareTripleChecker+Valid, 437 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-13 02:09:53,425 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [682 Valid, 314 Invalid, 723 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [286 Valid, 437 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-13 02:09:53,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9376 states. [2022-07-13 02:09:54,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9376 to 8659. [2022-07-13 02:09:54,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8659 states, 6117 states have (on average 1.1057708026810529) internal successors, (6764), 6272 states have internal predecessors, (6764), 1498 states have call successors, (1498), 347 states have call predecessors, (1498), 1040 states have return successors, (8216), 2039 states have call predecessors, (8216), 1330 states have call successors, (8216) [2022-07-13 02:09:54,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8659 states to 8659 states and 16478 transitions. [2022-07-13 02:09:54,194 INFO L78 Accepts]: Start accepts. Automaton has 8659 states and 16478 transitions. Word has length 58 [2022-07-13 02:09:54,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 02:09:54,194 INFO L495 AbstractCegarLoop]: Abstraction has 8659 states and 16478 transitions. [2022-07-13 02:09:54,195 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 3.739130434782609) internal successors, (86), 14 states have internal predecessors, (86), 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) [2022-07-13 02:09:54,195 INFO L276 IsEmpty]: Start isEmpty. Operand 8659 states and 16478 transitions. [2022-07-13 02:09:54,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-07-13 02:09:54,196 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 02:09:54,196 INFO L195 NwaCegarLoop]: trace histogram [6, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 02:09:54,237 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2022-07-13 02:09:54,440 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 02:09:54,440 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ackermannErr7ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2022-07-13 02:09:54,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 02:09:54,440 INFO L85 PathProgramCache]: Analyzing trace with hash 526800899, now seen corresponding path program 1 times [2022-07-13 02:09:54,440 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 02:09:54,440 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1727362593] [2022-07-13 02:09:54,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 02:09:54,441 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 02:09:54,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 02:09:54,464 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-07-13 02:09:54,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 02:09:54,481 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-13 02:09:54,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 02:09:54,498 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-07-13 02:09:54,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 02:09:54,517 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-07-13 02:09:54,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 02:09:54,534 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 38 proven. 6 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-07-13 02:09:54,534 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 02:09:54,534 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1727362593] [2022-07-13 02:09:54,534 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1727362593] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 02:09:54,534 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [518062069] [2022-07-13 02:09:54,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 02:09:54,534 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 02:09:54,534 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 02:09:54,535 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) [2022-07-13 02:09:54,587 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-07-13 02:09:54,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 02:09:54,623 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 15 conjunts are in the unsatisfiable core [2022-07-13 02:09:54,624 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 02:09:54,661 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 29 proven. 10 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-07-13 02:09:54,661 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 02:09:55,036 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 42 proven. 2 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-07-13 02:09:55,036 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [518062069] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 02:09:55,036 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 02:09:55,036 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 13] total 26 [2022-07-13 02:09:55,037 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1711085574] [2022-07-13 02:09:55,037 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 02:09:55,037 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-07-13 02:09:55,037 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 02:09:55,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-07-13 02:09:55,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=608, Unknown=0, NotChecked=0, Total=702 [2022-07-13 02:09:55,038 INFO L87 Difference]: Start difference. First operand 8659 states and 16478 transitions. Second operand has 27 states, 26 states have (on average 2.4615384615384617) internal successors, (64), 21 states have internal predecessors, (64), 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) [2022-07-13 02:09:57,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 02:09:57,408 INFO L93 Difference]: Finished difference Result 30203 states and 100302 transitions. [2022-07-13 02:09:57,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-07-13 02:09:57,410 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 2.4615384615384617) internal successors, (64), 21 states have internal predecessors, (64), 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 56 [2022-07-13 02:09:57,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 02:09:57,687 INFO L225 Difference]: With dead ends: 30203 [2022-07-13 02:09:57,688 INFO L226 Difference]: Without dead ends: 22210 [2022-07-13 02:09:57,797 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 804 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=906, Invalid=3516, Unknown=0, NotChecked=0, Total=4422 [2022-07-13 02:09:57,798 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 129 mSDsluCounter, 318 mSDsCounter, 0 mSdLazyCounter, 900 mSolverCounterSat, 264 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 354 SdHoareTripleChecker+Invalid, 1164 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 264 IncrementalHoareTripleChecker+Valid, 900 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-13 02:09:57,798 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [129 Valid, 354 Invalid, 1164 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [264 Valid, 900 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-13 02:09:57,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22210 states. [2022-07-13 02:09:59,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22210 to 17565. [2022-07-13 02:09:59,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17565 states, 11675 states have (on average 1.0707494646680942) internal successors, (12501), 11802 states have internal predecessors, (12501), 3307 states have call successors, (3307), 438 states have call predecessors, (3307), 2579 states have return successors, (43949), 5324 states have call predecessors, (43949), 3113 states have call successors, (43949) [2022-07-13 02:10:00,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17565 states to 17565 states and 59757 transitions. [2022-07-13 02:10:00,103 INFO L78 Accepts]: Start accepts. Automaton has 17565 states and 59757 transitions. Word has length 56 [2022-07-13 02:10:00,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 02:10:00,104 INFO L495 AbstractCegarLoop]: Abstraction has 17565 states and 59757 transitions. [2022-07-13 02:10:00,104 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 2.4615384615384617) internal successors, (64), 21 states have internal predecessors, (64), 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) [2022-07-13 02:10:00,104 INFO L276 IsEmpty]: Start isEmpty. Operand 17565 states and 59757 transitions. [2022-07-13 02:10:00,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-07-13 02:10:00,107 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 02:10:00,107 INFO L195 NwaCegarLoop]: trace histogram [9, 7, 5, 5, 5, 5, 5, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 02:10:00,136 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-07-13 02:10:00,312 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2022-07-13 02:10:00,312 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ackermannErr7ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2022-07-13 02:10:00,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 02:10:00,313 INFO L85 PathProgramCache]: Analyzing trace with hash -2027008992, now seen corresponding path program 2 times [2022-07-13 02:10:00,313 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 02:10:00,313 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [119633324] [2022-07-13 02:10:00,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 02:10:00,313 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 02:10:00,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 02:10:00,452 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-07-13 02:10:00,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 02:10:00,471 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-07-13 02:10:00,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 02:10:00,495 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-13 02:10:00,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 02:10:00,514 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-07-13 02:10:00,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 02:10:00,542 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-07-13 02:10:00,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 02:10:00,570 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 89 proven. 17 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2022-07-13 02:10:00,570 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 02:10:00,570 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [119633324] [2022-07-13 02:10:00,570 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [119633324] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 02:10:00,570 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1287307744] [2022-07-13 02:10:00,570 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-13 02:10:00,570 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 02:10:00,570 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 02:10:00,579 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) [2022-07-13 02:10:00,583 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-07-13 02:10:00,629 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-13 02:10:00,629 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 02:10:00,630 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 19 conjunts are in the unsatisfiable core [2022-07-13 02:10:00,631 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 02:10:00,682 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 78 proven. 23 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2022-07-13 02:10:00,682 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 02:10:01,288 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 97 proven. 9 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2022-07-13 02:10:01,288 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1287307744] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 02:10:01,288 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 02:10:01,289 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 16] total 32 [2022-07-13 02:10:01,289 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2119936781] [2022-07-13 02:10:01,289 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 02:10:01,289 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-07-13 02:10:01,289 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 02:10:01,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-07-13 02:10:01,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=930, Unknown=0, NotChecked=0, Total=1056 [2022-07-13 02:10:01,290 INFO L87 Difference]: Start difference. First operand 17565 states and 59757 transitions. Second operand has 33 states, 32 states have (on average 2.5) internal successors, (80), 23 states have internal predecessors, (80), 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) [2022-07-13 02:10:03,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 02:10:03,361 INFO L93 Difference]: Finished difference Result 29426 states and 97217 transitions. [2022-07-13 02:10:03,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-07-13 02:10:03,362 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 32 states have (on average 2.5) internal successors, (80), 23 states have internal predecessors, (80), 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 81 [2022-07-13 02:10:03,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 02:10:03,415 INFO L225 Difference]: With dead ends: 29426 [2022-07-13 02:10:03,415 INFO L226 Difference]: Without dead ends: 12522 [2022-07-13 02:10:03,825 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 158 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 606 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=750, Invalid=3032, Unknown=0, NotChecked=0, Total=3782 [2022-07-13 02:10:03,826 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 166 mSDsluCounter, 355 mSDsCounter, 0 mSdLazyCounter, 858 mSolverCounterSat, 185 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 166 SdHoareTripleChecker+Valid, 394 SdHoareTripleChecker+Invalid, 1043 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 185 IncrementalHoareTripleChecker+Valid, 858 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-13 02:10:03,827 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [166 Valid, 394 Invalid, 1043 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [185 Valid, 858 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-13 02:10:03,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12522 states. [2022-07-13 02:10:04,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12522 to 11029. [2022-07-13 02:10:04,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11029 states, 7807 states have (on average 1.1115665428461636) internal successors, (8678), 8110 states have internal predecessors, (8678), 1942 states have call successors, (1942), 487 states have call predecessors, (1942), 1276 states have return successors, (5975), 2431 states have call predecessors, (5975), 1723 states have call successors, (5975) [2022-07-13 02:10:04,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11029 states to 11029 states and 16595 transitions. [2022-07-13 02:10:04,893 INFO L78 Accepts]: Start accepts. Automaton has 11029 states and 16595 transitions. Word has length 81 [2022-07-13 02:10:04,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 02:10:04,893 INFO L495 AbstractCegarLoop]: Abstraction has 11029 states and 16595 transitions. [2022-07-13 02:10:04,893 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 32 states have (on average 2.5) internal successors, (80), 23 states have internal predecessors, (80), 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) [2022-07-13 02:10:04,893 INFO L276 IsEmpty]: Start isEmpty. Operand 11029 states and 16595 transitions. [2022-07-13 02:10:04,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-07-13 02:10:04,897 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 02:10:04,897 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 02:10:04,930 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-07-13 02:10:05,111 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 02:10:05,112 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ackermannErr7ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2022-07-13 02:10:05,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 02:10:05,112 INFO L85 PathProgramCache]: Analyzing trace with hash 821485916, now seen corresponding path program 4 times [2022-07-13 02:10:05,112 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 02:10:05,112 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1273778787] [2022-07-13 02:10:05,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 02:10:05,112 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 02:10:05,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 02:10:05,239 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-07-13 02:10:05,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 02:10:05,283 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 4 proven. 164 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-07-13 02:10:05,283 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 02:10:05,284 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1273778787] [2022-07-13 02:10:05,284 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1273778787] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 02:10:05,284 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [456047003] [2022-07-13 02:10:05,284 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-13 02:10:05,284 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 02:10:05,284 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 02:10:05,300 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) [2022-07-13 02:10:05,301 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-07-13 02:10:05,344 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-13 02:10:05,344 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 02:10:05,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 19 conjunts are in the unsatisfiable core [2022-07-13 02:10:05,346 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 02:10:05,416 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 106 proven. 4 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2022-07-13 02:10:05,416 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 02:10:05,477 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 106 proven. 4 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2022-07-13 02:10:05,477 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [456047003] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 02:10:05,477 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 02:10:05,477 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 6, 6] total 23 [2022-07-13 02:10:05,477 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1211322462] [2022-07-13 02:10:05,478 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 02:10:05,478 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-07-13 02:10:05,478 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 02:10:05,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-07-13 02:10:05,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=430, Unknown=0, NotChecked=0, Total=506 [2022-07-13 02:10:05,479 INFO L87 Difference]: Start difference. First operand 11029 states and 16595 transitions. Second operand has 23 states, 22 states have (on average 3.5454545454545454) internal successors, (78), 16 states have internal predecessors, (78), 10 states have call successors, (13), 9 states have call predecessors, (13), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-13 02:10:06,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 02:10:06,424 INFO L93 Difference]: Finished difference Result 11563 states and 17375 transitions. [2022-07-13 02:10:06,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-07-13 02:10:06,425 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 3.5454545454545454) internal successors, (78), 16 states have internal predecessors, (78), 10 states have call successors, (13), 9 states have call predecessors, (13), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 68 [2022-07-13 02:10:06,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 02:10:06,450 INFO L225 Difference]: With dead ends: 11563 [2022-07-13 02:10:06,450 INFO L226 Difference]: Without dead ends: 9324 [2022-07-13 02:10:06,457 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 265 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=374, Invalid=1348, Unknown=0, NotChecked=0, Total=1722 [2022-07-13 02:10:06,457 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 352 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 330 mSolverCounterSat, 145 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 352 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 475 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 145 IncrementalHoareTripleChecker+Valid, 330 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-13 02:10:06,457 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [352 Valid, 85 Invalid, 475 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [145 Valid, 330 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-13 02:10:06,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9324 states. [2022-07-13 02:10:07,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9324 to 8758. [2022-07-13 02:10:07,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8758 states, 5964 states have (on average 1.0675720992622402) internal successors, (6367), 6090 states have internal predecessors, (6367), 1731 states have call successors, (1731), 316 states have call predecessors, (1731), 1059 states have return successors, (5687), 2351 states have call predecessors, (5687), 1723 states have call successors, (5687) [2022-07-13 02:10:07,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8758 states to 8758 states and 13785 transitions. [2022-07-13 02:10:07,155 INFO L78 Accepts]: Start accepts. Automaton has 8758 states and 13785 transitions. Word has length 68 [2022-07-13 02:10:07,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 02:10:07,155 INFO L495 AbstractCegarLoop]: Abstraction has 8758 states and 13785 transitions. [2022-07-13 02:10:07,155 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 3.5454545454545454) internal successors, (78), 16 states have internal predecessors, (78), 10 states have call successors, (13), 9 states have call predecessors, (13), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-13 02:10:07,155 INFO L276 IsEmpty]: Start isEmpty. Operand 8758 states and 13785 transitions. [2022-07-13 02:10:07,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-07-13 02:10:07,158 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 02:10:07,158 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 6, 6, 6, 6, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 02:10:07,175 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-07-13 02:10:07,374 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 02:10:07,374 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ackermannErr7ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2022-07-13 02:10:07,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 02:10:07,374 INFO L85 PathProgramCache]: Analyzing trace with hash -131434271, now seen corresponding path program 3 times [2022-07-13 02:10:07,374 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 02:10:07,374 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [571103808] [2022-07-13 02:10:07,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 02:10:07,375 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 02:10:07,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 02:10:07,462 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-07-13 02:10:07,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 02:10:07,484 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-07-13 02:10:07,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 02:10:07,514 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 63 proven. 81 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-13 02:10:07,514 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 02:10:07,514 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [571103808] [2022-07-13 02:10:07,514 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [571103808] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 02:10:07,514 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2102690199] [2022-07-13 02:10:07,514 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-13 02:10:07,515 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 02:10:07,515 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 02:10:07,533 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) [2022-07-13 02:10:07,534 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-07-13 02:10:07,584 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2022-07-13 02:10:07,584 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 02:10:07,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 17 conjunts are in the unsatisfiable core [2022-07-13 02:10:07,586 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 02:10:07,662 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 61 proven. 83 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-13 02:10:07,662 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 02:10:07,973 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 65 proven. 79 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-13 02:10:07,974 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2102690199] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 02:10:07,974 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 02:10:07,974 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 33 [2022-07-13 02:10:07,974 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1842336521] [2022-07-13 02:10:07,974 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 02:10:07,974 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-07-13 02:10:07,974 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 02:10:07,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-07-13 02:10:07,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=949, Unknown=0, NotChecked=0, Total=1122 [2022-07-13 02:10:07,975 INFO L87 Difference]: Start difference. First operand 8758 states and 13785 transitions. Second operand has 34 states, 33 states have (on average 3.1818181818181817) internal successors, (105), 22 states have internal predecessors, (105), 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) [2022-07-13 02:10:09,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 02:10:09,093 INFO L93 Difference]: Finished difference Result 9409 states and 14783 transitions. [2022-07-13 02:10:09,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-07-13 02:10:09,094 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 3.1818181818181817) internal successors, (105), 22 states have internal predecessors, (105), 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 69 [2022-07-13 02:10:09,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 02:10:09,131 INFO L225 Difference]: With dead ends: 9409 [2022-07-13 02:10:09,132 INFO L226 Difference]: Without dead ends: 9408 [2022-07-13 02:10:09,141 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 468 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=573, Invalid=1977, Unknown=0, NotChecked=0, Total=2550 [2022-07-13 02:10:09,142 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 289 mSDsluCounter, 195 mSDsCounter, 0 mSdLazyCounter, 423 mSolverCounterSat, 264 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 289 SdHoareTripleChecker+Valid, 226 SdHoareTripleChecker+Invalid, 687 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 264 IncrementalHoareTripleChecker+Valid, 423 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-13 02:10:09,143 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [289 Valid, 226 Invalid, 687 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [264 Valid, 423 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-13 02:10:09,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9408 states. [2022-07-13 02:10:09,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9408 to 8866. [2022-07-13 02:10:09,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8866 states, 6036 states have (on average 1.0637839628893306) internal successors, (6421), 6162 states have internal predecessors, (6421), 1731 states have call successors, (1731), 316 states have call predecessors, (1731), 1095 states have return successors, (5781), 2387 states have call predecessors, (5781), 1723 states have call successors, (5781) [2022-07-13 02:10:09,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8866 states to 8866 states and 13933 transitions. [2022-07-13 02:10:09,822 INFO L78 Accepts]: Start accepts. Automaton has 8866 states and 13933 transitions. Word has length 69 [2022-07-13 02:10:09,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 02:10:09,822 INFO L495 AbstractCegarLoop]: Abstraction has 8866 states and 13933 transitions. [2022-07-13 02:10:09,823 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 33 states have (on average 3.1818181818181817) internal successors, (105), 22 states have internal predecessors, (105), 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) [2022-07-13 02:10:09,823 INFO L276 IsEmpty]: Start isEmpty. Operand 8866 states and 13933 transitions. [2022-07-13 02:10:09,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2022-07-13 02:10:09,826 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 02:10:09,826 INFO L195 NwaCegarLoop]: trace histogram [12, 8, 7, 6, 6, 6, 6, 6, 6, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2022-07-13 02:10:09,845 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-07-13 02:10:10,042 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 02:10:10,042 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2022-07-13 02:10:10,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 02:10:10,042 INFO L85 PathProgramCache]: Analyzing trace with hash -1701452426, now seen corresponding path program 2 times [2022-07-13 02:10:10,042 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 02:10:10,043 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [458314217] [2022-07-13 02:10:10,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 02:10:10,043 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 02:10:10,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 02:10:10,058 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-07-13 02:10:10,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 02:10:10,075 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-07-13 02:10:10,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 02:10:10,091 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-13 02:10:10,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 02:10:10,105 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-13 02:10:10,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 02:10:10,112 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-07-13 02:10:10,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 02:10:10,114 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-07-13 02:10:10,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 02:10:10,115 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-07-13 02:10:10,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 02:10:10,120 INFO L134 CoverageAnalysis]: Checked inductivity of 297 backedges. 136 proven. 24 refuted. 0 times theorem prover too weak. 137 trivial. 0 not checked. [2022-07-13 02:10:10,120 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 02:10:10,120 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [458314217] [2022-07-13 02:10:10,120 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [458314217] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 02:10:10,120 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1669213010] [2022-07-13 02:10:10,120 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-13 02:10:10,121 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 02:10:10,121 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 02:10:10,122 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) [2022-07-13 02:10:10,123 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-07-13 02:10:10,183 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-13 02:10:10,184 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 02:10:10,184 INFO L263 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-13 02:10:10,185 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 02:10:10,232 INFO L134 CoverageAnalysis]: Checked inductivity of 297 backedges. 136 proven. 15 refuted. 0 times theorem prover too weak. 146 trivial. 0 not checked. [2022-07-13 02:10:10,233 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 02:10:10,481 INFO L134 CoverageAnalysis]: Checked inductivity of 297 backedges. 136 proven. 26 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2022-07-13 02:10:10,482 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1669213010] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 02:10:10,482 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 02:10:10,482 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 8] total 13 [2022-07-13 02:10:10,482 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1149052959] [2022-07-13 02:10:10,482 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 02:10:10,482 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-07-13 02:10:10,482 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 02:10:10,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-07-13 02:10:10,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2022-07-13 02:10:10,483 INFO L87 Difference]: Start difference. First operand 8866 states and 13933 transitions. Second operand has 13 states, 13 states have (on average 6.230769230769231) internal successors, (81), 13 states have internal predecessors, (81), 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) [2022-07-13 02:10:11,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 02:10:11,121 INFO L93 Difference]: Finished difference Result 17989 states and 31874 transitions. [2022-07-13 02:10:11,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-13 02:10:11,121 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 6.230769230769231) internal successors, (81), 13 states have internal predecessors, (81), 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 104 [2022-07-13 02:10:11,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 02:10:11,152 INFO L225 Difference]: With dead ends: 17989 [2022-07-13 02:10:11,153 INFO L226 Difference]: Without dead ends: 9810 [2022-07-13 02:10:11,181 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 217 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=102, Invalid=204, Unknown=0, NotChecked=0, Total=306 [2022-07-13 02:10:11,183 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 80 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 161 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-13 02:10:11,183 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [82 Valid, 104 Invalid, 161 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 126 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-13 02:10:11,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9810 states. [2022-07-13 02:10:11,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9810 to 8860. [2022-07-13 02:10:11,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8860 states, 6033 states have (on average 1.0638156804243328) internal successors, (6418), 6159 states have internal predecessors, (6418), 1728 states have call successors, (1728), 316 states have call predecessors, (1728), 1095 states have return successors, (5701), 2384 states have call predecessors, (5701), 1693 states have call successors, (5701) [2022-07-13 02:10:11,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8860 states to 8860 states and 13847 transitions. [2022-07-13 02:10:11,884 INFO L78 Accepts]: Start accepts. Automaton has 8860 states and 13847 transitions. Word has length 104 [2022-07-13 02:10:11,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 02:10:11,884 INFO L495 AbstractCegarLoop]: Abstraction has 8860 states and 13847 transitions. [2022-07-13 02:10:11,884 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 6.230769230769231) internal successors, (81), 13 states have internal predecessors, (81), 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) [2022-07-13 02:10:11,885 INFO L276 IsEmpty]: Start isEmpty. Operand 8860 states and 13847 transitions. [2022-07-13 02:10:11,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2022-07-13 02:10:11,888 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 02:10:11,888 INFO L195 NwaCegarLoop]: trace histogram [11, 9, 6, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2022-07-13 02:10:11,906 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-07-13 02:10:12,104 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,SelfDestructingSolverStorable25 [2022-07-13 02:10:12,104 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2022-07-13 02:10:12,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 02:10:12,104 INFO L85 PathProgramCache]: Analyzing trace with hash 1897499616, now seen corresponding path program 3 times [2022-07-13 02:10:12,105 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 02:10:12,105 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [427727590] [2022-07-13 02:10:12,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 02:10:12,105 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 02:10:12,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 02:10:12,133 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-07-13 02:10:12,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 02:10:12,148 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-13 02:10:12,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 02:10:12,159 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-13 02:10:12,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 02:10:12,173 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-07-13 02:10:12,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 02:10:12,198 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-13 02:10:12,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 02:10:12,205 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-07-13 02:10:12,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 02:10:12,213 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-07-13 02:10:12,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 02:10:12,215 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2022-07-13 02:10:12,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 02:10:12,219 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-07-13 02:10:12,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 02:10:12,222 INFO L134 CoverageAnalysis]: Checked inductivity of 262 backedges. 113 proven. 45 refuted. 0 times theorem prover too weak. 104 trivial. 0 not checked. [2022-07-13 02:10:12,222 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 02:10:12,223 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [427727590] [2022-07-13 02:10:12,223 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [427727590] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 02:10:12,223 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [827907849] [2022-07-13 02:10:12,223 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-13 02:10:12,223 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 02:10:12,223 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 02:10:12,224 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) [2022-07-13 02:10:12,225 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-07-13 02:10:12,285 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-07-13 02:10:12,285 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 02:10:12,286 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 12 conjunts are in the unsatisfiable core [2022-07-13 02:10:12,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 02:10:12,354 INFO L134 CoverageAnalysis]: Checked inductivity of 262 backedges. 150 proven. 26 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2022-07-13 02:10:12,354 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 02:10:12,932 INFO L134 CoverageAnalysis]: Checked inductivity of 262 backedges. 119 proven. 57 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2022-07-13 02:10:12,932 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [827907849] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 02:10:12,932 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 02:10:12,932 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 11] total 16 [2022-07-13 02:10:12,933 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [945215880] [2022-07-13 02:10:12,933 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 02:10:12,933 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-07-13 02:10:12,933 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 02:10:12,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-07-13 02:10:12,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2022-07-13 02:10:12,934 INFO L87 Difference]: Start difference. First operand 8860 states and 13847 transitions. Second operand has 16 states, 16 states have (on average 5.1875) internal successors, (83), 16 states have internal predecessors, (83), 9 states have call successors, (14), 2 states have call predecessors, (14), 7 states have return successors, (17), 5 states have call predecessors, (17), 9 states have call successors, (17) [2022-07-13 02:10:13,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 02:10:13,802 INFO L93 Difference]: Finished difference Result 20507 states and 41561 transitions. [2022-07-13 02:10:13,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-13 02:10:13,803 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 5.1875) internal successors, (83), 16 states have internal predecessors, (83), 9 states have call successors, (14), 2 states have call predecessors, (14), 7 states have return successors, (17), 5 states have call predecessors, (17), 9 states have call successors, (17) Word has length 99 [2022-07-13 02:10:13,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 02:10:13,857 INFO L225 Difference]: With dead ends: 20507 [2022-07-13 02:10:13,857 INFO L226 Difference]: Without dead ends: 12363 [2022-07-13 02:10:13,902 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 231 GetRequests, 211 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=113, Invalid=267, Unknown=0, NotChecked=0, Total=380 [2022-07-13 02:10:13,902 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 93 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 166 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 206 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 166 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-13 02:10:13,903 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [99 Valid, 138 Invalid, 206 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 166 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-13 02:10:13,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12363 states. [2022-07-13 02:10:14,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12363 to 11997. [2022-07-13 02:10:14,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11997 states, 8101 states have (on average 1.054684606838662) internal successors, (8544), 8288 states have internal predecessors, (8544), 2417 states have call successors, (2417), 424 states have call predecessors, (2417), 1475 states have return successors, (8115), 3284 states have call predecessors, (8115), 2362 states have call successors, (8115) [2022-07-13 02:10:14,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11997 states to 11997 states and 19076 transitions. [2022-07-13 02:10:14,950 INFO L78 Accepts]: Start accepts. Automaton has 11997 states and 19076 transitions. Word has length 99 [2022-07-13 02:10:14,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 02:10:14,950 INFO L495 AbstractCegarLoop]: Abstraction has 11997 states and 19076 transitions. [2022-07-13 02:10:14,951 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 5.1875) internal successors, (83), 16 states have internal predecessors, (83), 9 states have call successors, (14), 2 states have call predecessors, (14), 7 states have return successors, (17), 5 states have call predecessors, (17), 9 states have call successors, (17) [2022-07-13 02:10:14,951 INFO L276 IsEmpty]: Start isEmpty. Operand 11997 states and 19076 transitions. [2022-07-13 02:10:14,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2022-07-13 02:10:14,958 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 02:10:14,958 INFO L195 NwaCegarLoop]: trace histogram [10, 8, 7, 7, 7, 7, 6, 6, 4, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 02:10:14,976 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-07-13 02:10:15,177 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,SelfDestructingSolverStorable26 [2022-07-13 02:10:15,178 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ackermannErr7ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2022-07-13 02:10:15,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 02:10:15,178 INFO L85 PathProgramCache]: Analyzing trace with hash -127918165, now seen corresponding path program 3 times [2022-07-13 02:10:15,178 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 02:10:15,179 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [670544012] [2022-07-13 02:10:15,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 02:10:15,179 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 02:10:15,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 02:10:15,266 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-07-13 02:10:15,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 02:10:15,293 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-13 02:10:15,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 02:10:15,321 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-07-13 02:10:15,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 02:10:15,359 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-07-13 02:10:15,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 02:10:15,382 INFO L134 CoverageAnalysis]: Checked inductivity of 233 backedges. 122 proven. 90 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-07-13 02:10:15,383 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 02:10:15,383 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [670544012] [2022-07-13 02:10:15,383 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [670544012] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 02:10:15,383 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [162970876] [2022-07-13 02:10:15,383 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-13 02:10:15,383 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 02:10:15,384 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 02:10:15,408 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) [2022-07-13 02:10:15,453 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-07-13 02:10:15,519 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2022-07-13 02:10:15,519 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 02:10:15,520 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 31 conjunts are in the unsatisfiable core [2022-07-13 02:10:15,521 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 02:10:15,643 INFO L134 CoverageAnalysis]: Checked inductivity of 233 backedges. 119 proven. 41 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2022-07-13 02:10:15,643 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 02:10:15,798 INFO L134 CoverageAnalysis]: Checked inductivity of 233 backedges. 148 proven. 13 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2022-07-13 02:10:15,798 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [162970876] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 02:10:15,798 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 02:10:15,798 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 7, 8] total 29 [2022-07-13 02:10:15,798 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1617187559] [2022-07-13 02:10:15,798 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 02:10:15,799 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-07-13 02:10:15,799 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 02:10:15,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-07-13 02:10:15,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=723, Unknown=0, NotChecked=0, Total=812 [2022-07-13 02:10:15,799 INFO L87 Difference]: Start difference. First operand 11997 states and 19076 transitions. Second operand has 29 states, 29 states have (on average 3.7241379310344827) internal successors, (108), 22 states have internal predecessors, (108), 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) [2022-07-13 02:10:17,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 02:10:17,676 INFO L93 Difference]: Finished difference Result 20852 states and 35642 transitions. [2022-07-13 02:10:17,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-07-13 02:10:17,677 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 3.7241379310344827) internal successors, (108), 22 states have internal predecessors, (108), 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 88 [2022-07-13 02:10:17,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 02:10:17,728 INFO L225 Difference]: With dead ends: 20852 [2022-07-13 02:10:17,728 INFO L226 Difference]: Without dead ends: 10359 [2022-07-13 02:10:17,796 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 248 GetRequests, 181 SyntacticMatches, 2 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 800 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=983, Invalid=3439, Unknown=0, NotChecked=0, Total=4422 [2022-07-13 02:10:17,796 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 251 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 964 mSolverCounterSat, 323 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 251 SdHoareTripleChecker+Valid, 143 SdHoareTripleChecker+Invalid, 1287 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 323 IncrementalHoareTripleChecker+Valid, 964 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-13 02:10:17,797 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [251 Valid, 143 Invalid, 1287 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [323 Valid, 964 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-13 02:10:17,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10359 states. [2022-07-13 02:10:18,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10359 to 8741. [2022-07-13 02:10:18,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8741 states, 5968 states have (on average 1.0464142091152815) internal successors, (6245), 6144 states have internal predecessors, (6245), 1711 states have call successors, (1711), 352 states have call predecessors, (1711), 1058 states have return successors, (4097), 2244 states have call predecessors, (4097), 1677 states have call successors, (4097) [2022-07-13 02:10:18,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8741 states to 8741 states and 12053 transitions. [2022-07-13 02:10:18,468 INFO L78 Accepts]: Start accepts. Automaton has 8741 states and 12053 transitions. Word has length 88 [2022-07-13 02:10:18,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 02:10:18,469 INFO L495 AbstractCegarLoop]: Abstraction has 8741 states and 12053 transitions. [2022-07-13 02:10:18,469 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 3.7241379310344827) internal successors, (108), 22 states have internal predecessors, (108), 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) [2022-07-13 02:10:18,469 INFO L276 IsEmpty]: Start isEmpty. Operand 8741 states and 12053 transitions. [2022-07-13 02:10:18,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2022-07-13 02:10:18,472 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 02:10:18,472 INFO L195 NwaCegarLoop]: trace histogram [10, 8, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 02:10:18,488 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-07-13 02:10:18,688 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,SelfDestructingSolverStorable27 [2022-07-13 02:10:18,688 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2022-07-13 02:10:18,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 02:10:18,689 INFO L85 PathProgramCache]: Analyzing trace with hash -635779733, now seen corresponding path program 4 times [2022-07-13 02:10:18,689 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 02:10:18,689 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [163963271] [2022-07-13 02:10:18,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 02:10:18,689 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 02:10:18,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 02:10:18,722 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-07-13 02:10:18,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 02:10:18,757 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-13 02:10:18,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 02:10:18,784 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-13 02:10:18,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 02:10:18,811 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-13 02:10:18,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 02:10:18,831 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-07-13 02:10:18,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 02:10:18,858 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-07-13 02:10:18,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 02:10:18,883 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-07-13 02:10:18,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 02:10:18,889 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2022-07-13 02:10:18,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 02:10:18,893 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 51 proven. 65 refuted. 0 times theorem prover too weak. 101 trivial. 0 not checked. [2022-07-13 02:10:18,894 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 02:10:18,894 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [163963271] [2022-07-13 02:10:18,894 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [163963271] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 02:10:18,894 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [399038543] [2022-07-13 02:10:18,894 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-13 02:10:18,894 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 02:10:18,894 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 02:10:18,895 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) [2022-07-13 02:10:18,896 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-07-13 02:10:18,963 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-13 02:10:18,963 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 02:10:18,964 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 27 conjunts are in the unsatisfiable core [2022-07-13 02:10:18,966 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 02:10:19,018 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 34 proven. 67 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2022-07-13 02:10:19,018 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 02:10:20,263 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 42 proven. 89 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2022-07-13 02:10:20,263 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [399038543] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 02:10:20,263 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 02:10:20,263 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17, 23] total 42 [2022-07-13 02:10:20,263 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [199822081] [2022-07-13 02:10:20,263 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 02:10:20,264 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-07-13 02:10:20,264 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 02:10:20,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-07-13 02:10:20,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=207, Invalid=1599, Unknown=0, NotChecked=0, Total=1806 [2022-07-13 02:10:20,265 INFO L87 Difference]: Start difference. First operand 8741 states and 12053 transitions. Second operand has 43 states, 42 states have (on average 1.8571428571428572) internal successors, (78), 33 states have internal predecessors, (78), 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) [2022-07-13 02:10:24,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 02:10:24,354 INFO L93 Difference]: Finished difference Result 29169 states and 46148 transitions. [2022-07-13 02:10:24,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 143 states. [2022-07-13 02:10:24,354 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 42 states have (on average 1.8571428571428572) internal successors, (78), 33 states have internal predecessors, (78), 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 90 [2022-07-13 02:10:24,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 02:10:24,456 INFO L225 Difference]: With dead ends: 29169 [2022-07-13 02:10:24,456 INFO L226 Difference]: Without dead ends: 28067 [2022-07-13 02:10:24,478 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 354 GetRequests, 175 SyntacticMatches, 0 SemanticMatches, 179 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12276 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=5454, Invalid=27126, Unknown=0, NotChecked=0, Total=32580 [2022-07-13 02:10:24,478 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 260 mSDsluCounter, 258 mSDsCounter, 0 mSdLazyCounter, 1174 mSolverCounterSat, 1078 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 271 SdHoareTripleChecker+Valid, 280 SdHoareTripleChecker+Invalid, 2252 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1078 IncrementalHoareTripleChecker+Valid, 1174 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-13 02:10:24,478 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [271 Valid, 280 Invalid, 2252 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1078 Valid, 1174 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-07-13 02:10:24,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28067 states. [2022-07-13 02:10:25,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28067 to 17311. [2022-07-13 02:10:25,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17311 states, 11232 states have (on average 1.0269764957264957) internal successors, (11535), 11391 states have internal predecessors, (11535), 3626 states have call successors, (3626), 460 states have call predecessors, (3626), 2449 states have return successors, (11770), 5459 states have call predecessors, (11770), 3572 states have call successors, (11770) [2022-07-13 02:10:25,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17311 states to 17311 states and 26931 transitions. [2022-07-13 02:10:25,907 INFO L78 Accepts]: Start accepts. Automaton has 17311 states and 26931 transitions. Word has length 90 [2022-07-13 02:10:25,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 02:10:25,908 INFO L495 AbstractCegarLoop]: Abstraction has 17311 states and 26931 transitions. [2022-07-13 02:10:25,908 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 42 states have (on average 1.8571428571428572) internal successors, (78), 33 states have internal predecessors, (78), 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) [2022-07-13 02:10:25,908 INFO L276 IsEmpty]: Start isEmpty. Operand 17311 states and 26931 transitions. [2022-07-13 02:10:25,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2022-07-13 02:10:25,910 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 02:10:25,910 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 10, 10, 1, 1, 1, 1, 1, 1] [2022-07-13 02:10:25,926 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-07-13 02:10:26,126 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 02:10:26,126 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ackermannErr7ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2022-07-13 02:10:26,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 02:10:26,127 INFO L85 PathProgramCache]: Analyzing trace with hash 147414137, now seen corresponding path program 3 times [2022-07-13 02:10:26,127 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 02:10:26,127 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [873819619] [2022-07-13 02:10:26,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 02:10:26,127 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 02:10:26,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 02:10:26,315 INFO L134 CoverageAnalysis]: Checked inductivity of 430 backedges. 0 proven. 430 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 02:10:26,316 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 02:10:26,316 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [873819619] [2022-07-13 02:10:26,316 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [873819619] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 02:10:26,316 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1901039970] [2022-07-13 02:10:26,316 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-13 02:10:26,316 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 02:10:26,316 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 02:10:26,317 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 02:10:26,321 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-07-13 02:10:26,403 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2022-07-13 02:10:26,404 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 02:10:26,405 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 24 conjunts are in the unsatisfiable core [2022-07-13 02:10:26,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 02:10:26,499 INFO L134 CoverageAnalysis]: Checked inductivity of 430 backedges. 0 proven. 430 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 02:10:26,499 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 02:10:26,940 INFO L134 CoverageAnalysis]: Checked inductivity of 430 backedges. 0 proven. 430 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 02:10:26,940 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1901039970] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 02:10:26,940 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 02:10:26,940 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 47 [2022-07-13 02:10:26,940 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [666754059] [2022-07-13 02:10:26,940 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 02:10:26,940 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-07-13 02:10:26,940 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 02:10:26,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-07-13 02:10:26,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=556, Invalid=1700, Unknown=0, NotChecked=0, Total=2256 [2022-07-13 02:10:26,941 INFO L87 Difference]: Start difference. First operand 17311 states and 26931 transitions. Second operand has 48 states, 45 states have (on average 3.533333333333333) internal successors, (159), 26 states have internal predecessors, (159), 22 states have call successors, (22), 22 states have call predecessors, (22), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 02:10:29,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 02:10:29,544 INFO L93 Difference]: Finished difference Result 28628 states and 44547 transitions. [2022-07-13 02:10:29,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2022-07-13 02:10:29,545 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 45 states have (on average 3.533333333333333) internal successors, (159), 26 states have internal predecessors, (159), 22 states have call successors, (22), 22 states have call predecessors, (22), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 92 [2022-07-13 02:10:29,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 02:10:29,628 INFO L225 Difference]: With dead ends: 28628 [2022-07-13 02:10:29,628 INFO L226 Difference]: Without dead ends: 28627 [2022-07-13 02:10:29,639 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 250 GetRequests, 160 SyntacticMatches, 1 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1830 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=2534, Invalid=5656, Unknown=0, NotChecked=0, Total=8190 [2022-07-13 02:10:29,640 INFO L413 NwaCegarLoop]: 68 mSDtfsCounter, 1113 mSDsluCounter, 556 mSDsCounter, 0 mSdLazyCounter, 718 mSolverCounterSat, 714 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1117 SdHoareTripleChecker+Valid, 624 SdHoareTripleChecker+Invalid, 1432 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 714 IncrementalHoareTripleChecker+Valid, 718 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-13 02:10:29,640 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1117 Valid, 624 Invalid, 1432 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [714 Valid, 718 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-13 02:10:29,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28627 states. [2022-07-13 02:10:31,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28627 to 28627. [2022-07-13 02:10:31,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28627 states, 18540 states have (on average 1.0279935275080907) internal successors, (19059), 18915 states have internal predecessors, (19059), 5846 states have call successors, (5846), 676 states have call predecessors, (5846), 4237 states have return successors, (19630), 9035 states have call predecessors, (19630), 5792 states have call successors, (19630) [2022-07-13 02:10:31,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28627 states to 28627 states and 44535 transitions. [2022-07-13 02:10:31,955 INFO L78 Accepts]: Start accepts. Automaton has 28627 states and 44535 transitions. Word has length 92 [2022-07-13 02:10:31,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 02:10:31,955 INFO L495 AbstractCegarLoop]: Abstraction has 28627 states and 44535 transitions. [2022-07-13 02:10:31,956 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 45 states have (on average 3.533333333333333) internal successors, (159), 26 states have internal predecessors, (159), 22 states have call successors, (22), 22 states have call predecessors, (22), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 02:10:31,956 INFO L276 IsEmpty]: Start isEmpty. Operand 28627 states and 44535 transitions. [2022-07-13 02:10:31,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2022-07-13 02:10:31,966 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 02:10:31,966 INFO L195 NwaCegarLoop]: trace histogram [20, 20, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1] [2022-07-13 02:10:31,990 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-07-13 02:10:32,189 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 02:10:32,190 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ackermannErr5ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2022-07-13 02:10:32,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 02:10:32,190 INFO L85 PathProgramCache]: Analyzing trace with hash -570444405, now seen corresponding path program 2 times [2022-07-13 02:10:32,190 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 02:10:32,190 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1228161183] [2022-07-13 02:10:32,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 02:10:32,190 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 02:10:32,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 02:10:32,456 INFO L134 CoverageAnalysis]: Checked inductivity of 903 backedges. 0 proven. 876 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-07-13 02:10:32,456 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 02:10:32,456 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1228161183] [2022-07-13 02:10:32,456 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1228161183] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 02:10:32,456 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [737290806] [2022-07-13 02:10:32,456 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-13 02:10:32,456 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 02:10:32,456 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 02:10:32,458 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 02:10:32,459 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-07-13 02:10:32,560 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-13 02:10:32,560 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 02:10:32,562 INFO L263 TraceCheckSpWp]: Trace formula consists of 343 conjuncts, 42 conjunts are in the unsatisfiable core [2022-07-13 02:10:32,564 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 02:10:32,734 INFO L134 CoverageAnalysis]: Checked inductivity of 903 backedges. 0 proven. 876 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-07-13 02:10:32,735 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 02:10:33,305 INFO L134 CoverageAnalysis]: Checked inductivity of 903 backedges. 0 proven. 876 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-07-13 02:10:33,305 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [737290806] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 02:10:33,305 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 02:10:33,306 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 47 [2022-07-13 02:10:33,306 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1458872046] [2022-07-13 02:10:33,306 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 02:10:33,306 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-07-13 02:10:33,306 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 02:10:33,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-07-13 02:10:33,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=556, Invalid=1700, Unknown=0, NotChecked=0, Total=2256 [2022-07-13 02:10:33,307 INFO L87 Difference]: Start difference. First operand 28627 states and 44535 transitions. Second operand has 48 states, 47 states have (on average 4.382978723404255) internal successors, (206), 26 states have internal predecessors, (206), 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) [2022-07-13 02:10:38,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 02:10:38,802 INFO L93 Difference]: Finished difference Result 64728 states and 101341 transitions. [2022-07-13 02:10:38,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2022-07-13 02:10:38,802 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 47 states have (on average 4.382978723404255) internal successors, (206), 26 states have internal predecessors, (206), 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 142 [2022-07-13 02:10:38,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 02:10:39,092 INFO L225 Difference]: With dead ends: 64728 [2022-07-13 02:10:39,092 INFO L226 Difference]: Without dead ends: 64727 [2022-07-13 02:10:39,122 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 367 GetRequests, 277 SyntacticMatches, 1 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1830 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=2534, Invalid=5656, Unknown=0, NotChecked=0, Total=8190 [2022-07-13 02:10:39,123 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 2365 mSDsluCounter, 505 mSDsCounter, 0 mSdLazyCounter, 835 mSolverCounterSat, 849 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2368 SdHoareTripleChecker+Valid, 532 SdHoareTripleChecker+Invalid, 1684 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 849 IncrementalHoareTripleChecker+Valid, 835 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-13 02:10:39,123 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2368 Valid, 532 Invalid, 1684 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [849 Valid, 835 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-13 02:10:39,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64727 states. [2022-07-13 02:10:43,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64727 to 64675. [2022-07-13 02:10:43,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64675 states, 41976 states have (on average 1.028659233847913) internal successors, (43179), 42843 states have internal predecessors, (43179), 13190 states have call successors, (13190), 1564 states have call predecessors, (13190), 9505 states have return successors, (44950), 20267 states have call predecessors, (44950), 13076 states have call successors, (44950) [2022-07-13 02:10:44,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64675 states to 64675 states and 101319 transitions. [2022-07-13 02:10:44,087 INFO L78 Accepts]: Start accepts. Automaton has 64675 states and 101319 transitions. Word has length 142 [2022-07-13 02:10:44,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 02:10:44,088 INFO L495 AbstractCegarLoop]: Abstraction has 64675 states and 101319 transitions. [2022-07-13 02:10:44,088 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 47 states have (on average 4.382978723404255) internal successors, (206), 26 states have internal predecessors, (206), 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) [2022-07-13 02:10:44,088 INFO L276 IsEmpty]: Start isEmpty. Operand 64675 states and 101319 transitions. [2022-07-13 02:10:44,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2022-07-13 02:10:44,102 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 02:10:44,103 INFO L195 NwaCegarLoop]: trace histogram [20, 17, 13, 9, 9, 9, 8, 8, 8, 7, 7, 7, 7, 7, 7, 6, 6, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1] [2022-07-13 02:10:44,121 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-07-13 02:10:44,319 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2022-07-13 02:10:44,319 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ackermannErr6ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2022-07-13 02:10:44,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 02:10:44,320 INFO L85 PathProgramCache]: Analyzing trace with hash -763702239, now seen corresponding path program 1 times [2022-07-13 02:10:44,320 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 02:10:44,320 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1945553748] [2022-07-13 02:10:44,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 02:10:44,320 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 02:10:44,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 02:10:44,350 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-07-13 02:10:44,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 02:10:44,380 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-07-13 02:10:44,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 02:10:44,733 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-13 02:10:44,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 02:10:44,754 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-07-13 02:10:44,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 02:10:44,766 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-13 02:10:44,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 02:10:44,777 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-07-13 02:10:44,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 02:10:44,793 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-07-13 02:10:44,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 02:10:44,809 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2022-07-13 02:10:44,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 02:10:44,830 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-13 02:10:44,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 02:10:44,849 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-13 02:10:44,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 02:10:44,866 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-13 02:10:44,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 02:10:44,882 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-13 02:10:44,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 02:10:44,896 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-07-13 02:10:44,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 02:10:44,899 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-07-13 02:10:44,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 02:10:44,906 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-07-13 02:10:44,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 02:10:44,908 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2022-07-13 02:10:44,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 02:10:44,910 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2022-07-13 02:10:44,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 02:10:44,912 INFO L134 CoverageAnalysis]: Checked inductivity of 1017 backedges. 407 proven. 214 refuted. 0 times theorem prover too weak. 396 trivial. 0 not checked. [2022-07-13 02:10:44,912 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 02:10:44,912 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1945553748] [2022-07-13 02:10:44,912 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1945553748] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 02:10:44,912 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [570951464] [2022-07-13 02:10:44,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 02:10:44,912 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 02:10:44,912 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 02:10:44,928 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 02:10:44,929 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-07-13 02:10:45,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 02:10:45,045 INFO L263 TraceCheckSpWp]: Trace formula consists of 455 conjuncts, 25 conjunts are in the unsatisfiable core [2022-07-13 02:10:45,047 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 02:10:45,146 INFO L134 CoverageAnalysis]: Checked inductivity of 1017 backedges. 395 proven. 216 refuted. 0 times theorem prover too weak. 406 trivial. 0 not checked. [2022-07-13 02:10:45,146 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 02:10:46,775 INFO L134 CoverageAnalysis]: Checked inductivity of 1017 backedges. 411 proven. 263 refuted. 0 times theorem prover too weak. 343 trivial. 0 not checked. [2022-07-13 02:10:46,775 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [570951464] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 02:10:46,775 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 02:10:46,775 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 21] total 27 [2022-07-13 02:10:46,775 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1186880296] [2022-07-13 02:10:46,775 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 02:10:46,776 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-07-13 02:10:46,776 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 02:10:46,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-07-13 02:10:46,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=589, Unknown=0, NotChecked=0, Total=702 [2022-07-13 02:10:46,776 INFO L87 Difference]: Start difference. First operand 64675 states and 101319 transitions. Second operand has 27 states, 27 states have (on average 4.518518518518518) internal successors, (122), 24 states have internal predecessors, (122), 16 states have call successors, (18), 2 states have call predecessors, (18), 14 states have return successors, (29), 12 states have call predecessors, (29), 15 states have call successors, (29) [2022-07-13 02:10:54,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 02:10:54,257 INFO L93 Difference]: Finished difference Result 152847 states and 310280 transitions. [2022-07-13 02:10:54,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-07-13 02:10:54,258 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 4.518518518518518) internal successors, (122), 24 states have internal predecessors, (122), 16 states have call successors, (18), 2 states have call predecessors, (18), 14 states have return successors, (29), 12 states have call predecessors, (29), 15 states have call successors, (29) Word has length 185 [2022-07-13 02:10:54,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 02:10:54,771 INFO L225 Difference]: With dead ends: 152847 [2022-07-13 02:10:54,771 INFO L226 Difference]: Without dead ends: 94875 [2022-07-13 02:10:55,306 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 447 GetRequests, 400 SyntacticMatches, 4 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 434 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=423, Invalid=1557, Unknown=0, NotChecked=0, Total=1980 [2022-07-13 02:10:55,307 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 159 mSDsluCounter, 207 mSDsCounter, 0 mSdLazyCounter, 481 mSolverCounterSat, 195 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 164 SdHoareTripleChecker+Valid, 241 SdHoareTripleChecker+Invalid, 676 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 195 IncrementalHoareTripleChecker+Valid, 481 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-13 02:10:55,308 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [164 Valid, 241 Invalid, 676 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [195 Valid, 481 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-13 02:10:55,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94875 states.