./Ultimate.py --spec ../sv-benchmarks/c/properties/no-overflow.prp --file ../sv-benchmarks/c/recursive/Ackermann02.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version 26d01a9c 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/Ackermann02.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 20c02b81d1b1bc312ccc75d6e9b31c6252d69e8a6e2560afe3a2a95a3e53102a --- Real Ultimate output --- This is Ultimate 0.2.2-?-26d01a9 [2023-02-17 03:39:44,547 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-02-17 03:39:44,548 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-02-17 03:39:44,607 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-02-17 03:39:44,608 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-02-17 03:39:44,611 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-02-17 03:39:44,625 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-02-17 03:39:44,627 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-02-17 03:39:44,629 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-02-17 03:39:44,633 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-02-17 03:39:44,634 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-02-17 03:39:44,635 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-02-17 03:39:44,636 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-02-17 03:39:44,637 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-02-17 03:39:44,638 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-02-17 03:39:44,640 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-02-17 03:39:44,641 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-02-17 03:39:44,641 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-02-17 03:39:44,643 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-02-17 03:39:44,644 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-02-17 03:39:44,647 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-02-17 03:39:44,648 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-02-17 03:39:44,649 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-02-17 03:39:44,650 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-02-17 03:39:44,670 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-02-17 03:39:44,671 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-02-17 03:39:44,671 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-02-17 03:39:44,673 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-02-17 03:39:44,673 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-02-17 03:39:44,674 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-02-17 03:39:44,674 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-02-17 03:39:44,674 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-02-17 03:39:44,675 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-02-17 03:39:44,676 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-02-17 03:39:44,677 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-02-17 03:39:44,677 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-02-17 03:39:44,677 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-02-17 03:39:44,677 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-02-17 03:39:44,678 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-02-17 03:39:44,678 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-02-17 03:39:44,679 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-02-17 03:39:44,680 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Overflow-32bit-Automizer_Default.epf [2023-02-17 03:39:44,718 INFO L113 SettingsManager]: Loading preferences was successful [2023-02-17 03:39:44,719 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-02-17 03:39:44,719 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-02-17 03:39:44,719 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-02-17 03:39:44,720 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-02-17 03:39:44,720 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-02-17 03:39:44,721 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-02-17 03:39:44,721 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-02-17 03:39:44,721 INFO L138 SettingsManager]: * Use SBE=true [2023-02-17 03:39:44,721 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-02-17 03:39:44,722 INFO L138 SettingsManager]: * sizeof long=4 [2023-02-17 03:39:44,722 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-02-17 03:39:44,722 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-02-17 03:39:44,722 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-02-17 03:39:44,722 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-02-17 03:39:44,722 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-02-17 03:39:44,722 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-02-17 03:39:44,722 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-02-17 03:39:44,723 INFO L138 SettingsManager]: * Check absence of signed integer overflows=true [2023-02-17 03:39:44,723 INFO L138 SettingsManager]: * sizeof long double=12 [2023-02-17 03:39:44,723 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-02-17 03:39:44,723 INFO L138 SettingsManager]: * Use constant arrays=true [2023-02-17 03:39:44,723 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-02-17 03:39:44,723 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-02-17 03:39:44,723 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-02-17 03:39:44,724 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-02-17 03:39:44,724 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-17 03:39:44,724 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-02-17 03:39:44,724 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-02-17 03:39:44,724 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-02-17 03:39:44,724 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-02-17 03:39:44,724 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-02-17 03:39:44,725 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-02-17 03:39:44,725 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-02-17 03:39:44,725 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-02-17 03:39:44,725 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-02-17 03:39:44,725 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-02-17 03:39:44,725 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 20c02b81d1b1bc312ccc75d6e9b31c6252d69e8a6e2560afe3a2a95a3e53102a [2023-02-17 03:39:45,053 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-02-17 03:39:45,074 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-02-17 03:39:45,075 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-02-17 03:39:45,076 INFO L271 PluginConnector]: Initializing CDTParser... [2023-02-17 03:39:45,076 INFO L275 PluginConnector]: CDTParser initialized [2023-02-17 03:39:45,077 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/recursive/Ackermann02.c [2023-02-17 03:39:46,145 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-02-17 03:39:46,308 INFO L351 CDTParser]: Found 1 translation units. [2023-02-17 03:39:46,308 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursive/Ackermann02.c [2023-02-17 03:39:46,313 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/846e66b21/7ccf96398c4041da92b3eee7f6bcaf05/FLAG9f7a64ea5 [2023-02-17 03:39:46,328 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/846e66b21/7ccf96398c4041da92b3eee7f6bcaf05 [2023-02-17 03:39:46,331 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-02-17 03:39:46,333 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-02-17 03:39:46,335 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-02-17 03:39:46,335 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-02-17 03:39:46,337 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-02-17 03:39:46,338 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.02 03:39:46" (1/1) ... [2023-02-17 03:39:46,339 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@54893574 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 03:39:46, skipping insertion in model container [2023-02-17 03:39:46,339 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.02 03:39:46" (1/1) ... [2023-02-17 03:39:46,344 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-02-17 03:39:46,354 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-02-17 03:39:46,465 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursive/Ackermann02.c[1157,1170] [2023-02-17 03:39:46,466 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-17 03:39:46,475 INFO L203 MainTranslator]: Completed pre-run [2023-02-17 03:39:46,490 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursive/Ackermann02.c[1157,1170] [2023-02-17 03:39:46,490 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-17 03:39:46,499 INFO L208 MainTranslator]: Completed translation [2023-02-17 03:39:46,500 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 03:39:46 WrapperNode [2023-02-17 03:39:46,500 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-02-17 03:39:46,501 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-02-17 03:39:46,502 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-02-17 03:39:46,502 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-02-17 03:39:46,507 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 03:39:46" (1/1) ... [2023-02-17 03:39:46,512 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 03:39:46" (1/1) ... [2023-02-17 03:39:46,522 INFO L138 Inliner]: procedures = 13, calls = 11, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 32 [2023-02-17 03:39:46,522 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-02-17 03:39:46,523 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-02-17 03:39:46,523 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-02-17 03:39:46,523 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-02-17 03:39:46,528 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 03:39:46" (1/1) ... [2023-02-17 03:39:46,529 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 03:39:46" (1/1) ... [2023-02-17 03:39:46,529 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 03:39:46" (1/1) ... [2023-02-17 03:39:46,530 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 03:39:46" (1/1) ... [2023-02-17 03:39:46,531 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 03:39:46" (1/1) ... [2023-02-17 03:39:46,532 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 03:39:46" (1/1) ... [2023-02-17 03:39:46,533 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 03:39:46" (1/1) ... [2023-02-17 03:39:46,533 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 03:39:46" (1/1) ... [2023-02-17 03:39:46,534 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-02-17 03:39:46,535 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-02-17 03:39:46,535 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-02-17 03:39:46,535 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-02-17 03:39:46,536 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 03:39:46" (1/1) ... [2023-02-17 03:39:46,543 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-17 03:39:46,549 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 03:39:46,560 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-02-17 03:39:46,562 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-02-17 03:39:46,588 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-02-17 03:39:46,588 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-02-17 03:39:46,589 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-02-17 03:39:46,589 INFO L130 BoogieDeclarations]: Found specification of procedure ackermann [2023-02-17 03:39:46,589 INFO L138 BoogieDeclarations]: Found implementation of procedure ackermann [2023-02-17 03:39:46,589 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-02-17 03:39:46,633 INFO L235 CfgBuilder]: Building ICFG [2023-02-17 03:39:46,635 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2023-02-17 03:39:46,785 INFO L276 CfgBuilder]: Performing block encoding [2023-02-17 03:39:46,791 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-02-17 03:39:46,791 INFO L300 CfgBuilder]: Removed 0 assume(true) statements. [2023-02-17 03:39:46,792 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.02 03:39:46 BoogieIcfgContainer [2023-02-17 03:39:46,792 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-02-17 03:39:46,794 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-02-17 03:39:46,806 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-02-17 03:39:46,809 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-02-17 03:39:46,809 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.02 03:39:46" (1/3) ... [2023-02-17 03:39:46,810 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5d8e65a9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.02 03:39:46, skipping insertion in model container [2023-02-17 03:39:46,810 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 03:39:46" (2/3) ... [2023-02-17 03:39:46,810 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5d8e65a9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.02 03:39:46, skipping insertion in model container [2023-02-17 03:39:46,810 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.02 03:39:46" (3/3) ... [2023-02-17 03:39:46,811 INFO L112 eAbstractionObserver]: Analyzing ICFG Ackermann02.c [2023-02-17 03:39:46,823 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-02-17 03:39:46,836 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 8 error locations. [2023-02-17 03:39:46,888 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-02-17 03:39:46,894 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@62d2f209, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-02-17 03:39:46,894 INFO L358 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2023-02-17 03:39:46,897 INFO L276 IsEmpty]: Start isEmpty. Operand has 38 states, 24 states have (on average 1.5416666666666667) internal successors, (37), 32 states have internal predecessors, (37), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-02-17 03:39:46,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-02-17 03:39:46,903 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 03:39:46,903 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 03:39:46,905 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2023-02-17 03:39:46,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 03:39:46,909 INFO L85 PathProgramCache]: Analyzing trace with hash 180762217, now seen corresponding path program 1 times [2023-02-17 03:39:46,914 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 03:39:46,915 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1267106069] [2023-02-17 03:39:46,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 03:39:46,915 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 03:39:46,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 03:39:47,078 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 03:39:47,079 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 03:39:47,079 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1267106069] [2023-02-17 03:39:47,079 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1267106069] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 03:39:47,080 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 03:39:47,080 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-17 03:39:47,081 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1070967084] [2023-02-17 03:39:47,082 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 03:39:47,086 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-17 03:39:47,086 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 03:39:47,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-17 03:39:47,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-02-17 03:39:47,124 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, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 03:39:47,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 03:39:47,245 INFO L93 Difference]: Finished difference Result 73 states and 85 transitions. [2023-02-17 03:39:47,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-17 03:39:47,255 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2023-02-17 03:39:47,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 03:39:47,260 INFO L225 Difference]: With dead ends: 73 [2023-02-17 03:39:47,261 INFO L226 Difference]: Without dead ends: 60 [2023-02-17 03:39:47,262 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-02-17 03:39:47,265 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 61 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-17 03:39:47,286 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [66 Valid, 113 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-17 03:39:47,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2023-02-17 03:39:47,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 51. [2023-02-17 03:39:47,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 34 states have (on average 1.5588235294117647) internal successors, (53), 42 states have internal predecessors, (53), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-02-17 03:39:47,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 66 transitions. [2023-02-17 03:39:47,338 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 66 transitions. Word has length 8 [2023-02-17 03:39:47,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 03:39:47,338 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 66 transitions. [2023-02-17 03:39:47,339 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 03:39:47,339 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 66 transitions. [2023-02-17 03:39:47,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2023-02-17 03:39:47,339 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 03:39:47,339 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 03:39:47,340 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-02-17 03:39:47,340 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2023-02-17 03:39:47,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 03:39:47,341 INFO L85 PathProgramCache]: Analyzing trace with hash 1308666490, now seen corresponding path program 1 times [2023-02-17 03:39:47,341 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 03:39:47,341 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1470573569] [2023-02-17 03:39:47,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 03:39:47,341 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 03:39:47,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 03:39:47,378 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 03:39:47,378 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 03:39:47,378 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1470573569] [2023-02-17 03:39:47,379 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1470573569] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 03:39:47,379 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 03:39:47,379 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-17 03:39:47,379 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1791495191] [2023-02-17 03:39:47,379 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 03:39:47,380 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-17 03:39:47,380 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 03:39:47,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-17 03:39:47,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-02-17 03:39:47,381 INFO L87 Difference]: Start difference. First operand 51 states and 66 transitions. Second operand has 5 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 03:39:47,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 03:39:47,441 INFO L93 Difference]: Finished difference Result 101 states and 139 transitions. [2023-02-17 03:39:47,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-17 03:39:47,442 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2023-02-17 03:39:47,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 03:39:47,443 INFO L225 Difference]: With dead ends: 101 [2023-02-17 03:39:47,443 INFO L226 Difference]: Without dead ends: 95 [2023-02-17 03:39:47,444 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-02-17 03:39:47,445 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 48 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-17 03:39:47,445 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 89 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-17 03:39:47,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2023-02-17 03:39:47,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 85. [2023-02-17 03:39:47,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 61 states have (on average 1.540983606557377) internal successors, (94), 70 states have internal predecessors, (94), 13 states have call successors, (13), 4 states have call predecessors, (13), 3 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2023-02-17 03:39:47,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 117 transitions. [2023-02-17 03:39:47,459 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 117 transitions. Word has length 9 [2023-02-17 03:39:47,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 03:39:47,460 INFO L495 AbstractCegarLoop]: Abstraction has 85 states and 117 transitions. [2023-02-17 03:39:47,460 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 03:39:47,460 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 117 transitions. [2023-02-17 03:39:47,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2023-02-17 03:39:47,461 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 03:39:47,461 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 03:39:47,461 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-02-17 03:39:47,461 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2023-02-17 03:39:47,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 03:39:47,462 INFO L85 PathProgramCache]: Analyzing trace with hash 1308661493, now seen corresponding path program 1 times [2023-02-17 03:39:47,462 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 03:39:47,462 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [297391538] [2023-02-17 03:39:47,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 03:39:47,463 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 03:39:47,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 03:39:47,507 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 03:39:47,507 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 03:39:47,507 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [297391538] [2023-02-17 03:39:47,508 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [297391538] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 03:39:47,508 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 03:39:47,508 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-17 03:39:47,508 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1291322285] [2023-02-17 03:39:47,508 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 03:39:47,509 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-17 03:39:47,509 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 03:39:47,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-17 03:39:47,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-02-17 03:39:47,510 INFO L87 Difference]: Start difference. First operand 85 states and 117 transitions. Second operand has 5 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 03:39:47,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 03:39:47,610 INFO L93 Difference]: Finished difference Result 114 states and 154 transitions. [2023-02-17 03:39:47,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-17 03:39:47,611 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2023-02-17 03:39:47,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 03:39:47,613 INFO L225 Difference]: With dead ends: 114 [2023-02-17 03:39:47,613 INFO L226 Difference]: Without dead ends: 110 [2023-02-17 03:39:47,613 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 [2023-02-17 03:39:47,614 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 49 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-17 03:39:47,615 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 93 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-17 03:39:47,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2023-02-17 03:39:47,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 102. [2023-02-17 03:39:47,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 74 states have (on average 1.472972972972973) internal successors, (109), 83 states have internal predecessors, (109), 16 states have call successors, (16), 5 states have call predecessors, (16), 4 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2023-02-17 03:39:47,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 138 transitions. [2023-02-17 03:39:47,632 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 138 transitions. Word has length 9 [2023-02-17 03:39:47,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 03:39:47,632 INFO L495 AbstractCegarLoop]: Abstraction has 102 states and 138 transitions. [2023-02-17 03:39:47,632 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 03:39:47,632 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 138 transitions. [2023-02-17 03:39:47,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-02-17 03:39:47,633 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 03:39:47,633 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 03:39:47,633 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-02-17 03:39:47,634 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ackermannErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2023-02-17 03:39:47,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 03:39:47,634 INFO L85 PathProgramCache]: Analyzing trace with hash 1913955596, now seen corresponding path program 1 times [2023-02-17 03:39:47,634 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 03:39:47,637 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [390188457] [2023-02-17 03:39:47,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 03:39:47,637 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 03:39:47,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 03:39:47,673 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 03:39:47,674 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 03:39:47,674 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [390188457] [2023-02-17 03:39:47,674 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [390188457] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 03:39:47,674 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 03:39:47,674 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-17 03:39:47,675 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1294707575] [2023-02-17 03:39:47,675 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 03:39:47,675 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-17 03:39:47,675 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 03:39:47,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-17 03:39:47,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-02-17 03:39:47,676 INFO L87 Difference]: Start difference. First operand 102 states and 138 transitions. Second operand has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 03:39:47,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 03:39:47,714 INFO L93 Difference]: Finished difference Result 102 states and 138 transitions. [2023-02-17 03:39:47,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-02-17 03:39:47,715 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2023-02-17 03:39:47,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 03:39:47,716 INFO L225 Difference]: With dead ends: 102 [2023-02-17 03:39:47,716 INFO L226 Difference]: Without dead ends: 100 [2023-02-17 03:39:47,717 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-02-17 03:39:47,718 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 42 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-17 03:39:47,718 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 45 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-17 03:39:47,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2023-02-17 03:39:47,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 100. [2023-02-17 03:39:47,730 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) [2023-02-17 03:39:47,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 128 transitions. [2023-02-17 03:39:47,732 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 128 transitions. Word has length 10 [2023-02-17 03:39:47,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 03:39:47,732 INFO L495 AbstractCegarLoop]: Abstraction has 100 states and 128 transitions. [2023-02-17 03:39:47,732 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 03:39:47,732 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 128 transitions. [2023-02-17 03:39:47,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-02-17 03:39:47,733 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 03:39:47,733 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 03:39:47,733 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-02-17 03:39:47,733 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ackermannErr6ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2023-02-17 03:39:47,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 03:39:47,734 INFO L85 PathProgramCache]: Analyzing trace with hash -796703108, now seen corresponding path program 1 times [2023-02-17 03:39:47,734 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 03:39:47,734 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [70745637] [2023-02-17 03:39:47,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 03:39:47,735 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 03:39:47,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 03:39:47,782 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 03:39:47,782 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 03:39:47,782 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [70745637] [2023-02-17 03:39:47,783 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [70745637] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 03:39:47,783 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 03:39:47,783 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-17 03:39:47,783 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [981500682] [2023-02-17 03:39:47,783 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 03:39:47,784 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-17 03:39:47,784 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 03:39:47,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-17 03:39:47,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-02-17 03:39:47,788 INFO L87 Difference]: Start difference. First operand 100 states and 128 transitions. Second operand has 5 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 03:39:47,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 03:39:47,851 INFO L93 Difference]: Finished difference Result 109 states and 140 transitions. [2023-02-17 03:39:47,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-17 03:39:47,852 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 states have internal predecessors, (10), 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 11 [2023-02-17 03:39:47,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 03:39:47,853 INFO L225 Difference]: With dead ends: 109 [2023-02-17 03:39:47,853 INFO L226 Difference]: Without dead ends: 108 [2023-02-17 03:39:47,853 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 [2023-02-17 03:39:47,854 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 38 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 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 [2023-02-17 03:39:47,855 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 92 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-17 03:39:47,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2023-02-17 03:39:47,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 100. [2023-02-17 03:39:47,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 74 states have (on average 1.3108108108108107) internal successors, (97), 81 states have internal predecessors, (97), 16 states have call successors, (16), 5 states have call predecessors, (16), 4 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2023-02-17 03:39:47,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 126 transitions. [2023-02-17 03:39:47,867 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 126 transitions. Word has length 11 [2023-02-17 03:39:47,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 03:39:47,867 INFO L495 AbstractCegarLoop]: Abstraction has 100 states and 126 transitions. [2023-02-17 03:39:47,867 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 03:39:47,867 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 126 transitions. [2023-02-17 03:39:47,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-02-17 03:39:47,868 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 03:39:47,868 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 03:39:47,868 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-02-17 03:39:47,868 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2023-02-17 03:39:47,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 03:39:47,869 INFO L85 PathProgramCache]: Analyzing trace with hash 1669645175, now seen corresponding path program 1 times [2023-02-17 03:39:47,869 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 03:39:47,869 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [304849584] [2023-02-17 03:39:47,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 03:39:47,870 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 03:39:47,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 03:39:47,900 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 03:39:47,900 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 03:39:47,900 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [304849584] [2023-02-17 03:39:47,900 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [304849584] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 03:39:47,900 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 03:39:47,901 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-17 03:39:47,901 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1187152006] [2023-02-17 03:39:47,901 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 03:39:47,901 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-17 03:39:47,901 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 03:39:47,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-17 03:39:47,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-17 03:39:47,902 INFO L87 Difference]: Start difference. First operand 100 states and 126 transitions. Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 states have internal predecessors, (13), 1 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 03:39:47,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 03:39:47,940 INFO L93 Difference]: Finished difference Result 168 states and 221 transitions. [2023-02-17 03:39:47,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-17 03:39:47,941 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 states have internal predecessors, (13), 1 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2023-02-17 03:39:47,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 03:39:47,942 INFO L225 Difference]: With dead ends: 168 [2023-02-17 03:39:47,942 INFO L226 Difference]: Without dead ends: 97 [2023-02-17 03:39:47,943 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-02-17 03:39:47,946 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 26 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-17 03:39:47,947 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 88 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-17 03:39:47,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2023-02-17 03:39:47,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 96. [2023-02-17 03:39:47,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 71 states have (on average 1.295774647887324) internal successors, (92), 78 states have internal predecessors, (92), 15 states have call successors, (15), 5 states have call predecessors, (15), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2023-02-17 03:39:47,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 119 transitions. [2023-02-17 03:39:47,963 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 119 transitions. Word has length 15 [2023-02-17 03:39:47,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 03:39:47,963 INFO L495 AbstractCegarLoop]: Abstraction has 96 states and 119 transitions. [2023-02-17 03:39:47,963 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 states have internal predecessors, (13), 1 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 03:39:47,963 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 119 transitions. [2023-02-17 03:39:47,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-02-17 03:39:47,964 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 03:39:47,964 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 03:39:47,964 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-02-17 03:39:47,964 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ackermannErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2023-02-17 03:39:47,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 03:39:47,965 INFO L85 PathProgramCache]: Analyzing trace with hash 1669645399, now seen corresponding path program 1 times [2023-02-17 03:39:47,965 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 03:39:47,965 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [142889402] [2023-02-17 03:39:47,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 03:39:47,965 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 03:39:47,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 03:39:48,009 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 03:39:48,010 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 03:39:48,010 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [142889402] [2023-02-17 03:39:48,010 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [142889402] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 03:39:48,010 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1478790006] [2023-02-17 03:39:48,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 03:39:48,011 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 03:39:48,011 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 03:39:48,013 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-17 03:39:48,046 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-02-17 03:39:48,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 03:39:48,063 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 6 conjunts are in the unsatisfiable core [2023-02-17 03:39:48,067 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 03:39:48,099 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 03:39:48,099 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 03:39:48,127 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 03:39:48,127 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1478790006] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 03:39:48,128 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 03:39:48,128 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 11 [2023-02-17 03:39:48,128 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1406055239] [2023-02-17 03:39:48,128 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 03:39:48,128 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-02-17 03:39:48,128 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 03:39:48,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-02-17 03:39:48,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2023-02-17 03:39:48,129 INFO L87 Difference]: Start difference. First operand 96 states and 119 transitions. Second operand has 12 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 8 states have internal predecessors, (24), 4 states have call successors, (4), 4 states have call predecessors, (4), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 03:39:48,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 03:39:48,412 INFO L93 Difference]: Finished difference Result 274 states and 356 transitions. [2023-02-17 03:39:48,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-02-17 03:39:48,413 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 8 states have internal predecessors, (24), 4 states have call successors, (4), 4 states have call predecessors, (4), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2023-02-17 03:39:48,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 03:39:48,418 INFO L225 Difference]: With dead ends: 274 [2023-02-17 03:39:48,418 INFO L226 Difference]: Without dead ends: 272 [2023-02-17 03:39:48,420 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=104, Invalid=238, Unknown=0, NotChecked=0, Total=342 [2023-02-17 03:39:48,422 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 249 mSDsluCounter, 134 mSDsCounter, 0 mSdLazyCounter, 148 mSolverCounterSat, 97 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 255 SdHoareTripleChecker+Valid, 163 SdHoareTripleChecker+Invalid, 245 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 148 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-17 03:39:48,423 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [255 Valid, 163 Invalid, 245 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 148 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-17 03:39:48,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2023-02-17 03:39:48,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 236. [2023-02-17 03:39:48,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 236 states, 182 states have (on average 1.2637362637362637) internal successors, (230), 189 states have internal predecessors, (230), 36 states have call successors, (36), 13 states have call predecessors, (36), 12 states have return successors, (33), 33 states have call predecessors, (33), 33 states have call successors, (33) [2023-02-17 03:39:48,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 299 transitions. [2023-02-17 03:39:48,459 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 299 transitions. Word has length 15 [2023-02-17 03:39:48,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 03:39:48,459 INFO L495 AbstractCegarLoop]: Abstraction has 236 states and 299 transitions. [2023-02-17 03:39:48,459 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 8 states have internal predecessors, (24), 4 states have call successors, (4), 4 states have call predecessors, (4), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 03:39:48,460 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 299 transitions. [2023-02-17 03:39:48,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-02-17 03:39:48,461 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 03:39:48,461 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 03:39:48,467 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-02-17 03:39:48,666 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 [2023-02-17 03:39:48,667 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2023-02-17 03:39:48,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 03:39:48,671 INFO L85 PathProgramCache]: Analyzing trace with hash 1422985811, now seen corresponding path program 1 times [2023-02-17 03:39:48,671 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 03:39:48,671 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [339930176] [2023-02-17 03:39:48,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 03:39:48,671 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 03:39:48,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 03:39:48,730 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 03:39:48,731 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 03:39:48,731 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [339930176] [2023-02-17 03:39:48,731 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [339930176] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 03:39:48,731 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [291114924] [2023-02-17 03:39:48,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 03:39:48,731 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 03:39:48,732 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 03:39:48,737 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-17 03:39:48,739 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-02-17 03:39:48,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 03:39:48,765 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 4 conjunts are in the unsatisfiable core [2023-02-17 03:39:48,765 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 03:39:48,783 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 03:39:48,784 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-17 03:39:48,784 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [291114924] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 03:39:48,787 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-02-17 03:39:48,788 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 9 [2023-02-17 03:39:48,788 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1604826418] [2023-02-17 03:39:48,789 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 03:39:48,790 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-17 03:39:48,791 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 03:39:48,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-17 03:39:48,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2023-02-17 03:39:48,791 INFO L87 Difference]: Start difference. First operand 236 states and 299 transitions. Second operand has 5 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 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) [2023-02-17 03:39:48,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 03:39:48,851 INFO L93 Difference]: Finished difference Result 328 states and 437 transitions. [2023-02-17 03:39:48,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-17 03:39:48,851 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 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 16 [2023-02-17 03:39:48,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 03:39:48,854 INFO L225 Difference]: With dead ends: 328 [2023-02-17 03:39:48,854 INFO L226 Difference]: Without dead ends: 327 [2023-02-17 03:39:48,855 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2023-02-17 03:39:48,858 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 41 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-17 03:39:48,859 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 96 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-17 03:39:48,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 327 states. [2023-02-17 03:39:48,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 327 to 293. [2023-02-17 03:39:48,884 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) [2023-02-17 03:39:48,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 373 transitions. [2023-02-17 03:39:48,886 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 373 transitions. Word has length 16 [2023-02-17 03:39:48,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 03:39:48,886 INFO L495 AbstractCegarLoop]: Abstraction has 293 states and 373 transitions. [2023-02-17 03:39:48,886 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 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) [2023-02-17 03:39:48,886 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 373 transitions. [2023-02-17 03:39:48,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-02-17 03:39:48,887 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 03:39:48,887 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 03:39:48,898 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-02-17 03:39:49,092 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 [2023-02-17 03:39:49,093 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ackermannErr6ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2023-02-17 03:39:49,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 03:39:49,096 INFO L85 PathProgramCache]: Analyzing trace with hash 848163410, now seen corresponding path program 1 times [2023-02-17 03:39:49,096 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 03:39:49,096 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1363789598] [2023-02-17 03:39:49,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 03:39:49,096 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 03:39:49,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 03:39:49,138 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 03:39:49,138 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 03:39:49,138 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1363789598] [2023-02-17 03:39:49,139 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1363789598] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 03:39:49,139 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1678162710] [2023-02-17 03:39:49,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 03:39:49,139 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 03:39:49,139 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 03:39:49,158 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-17 03:39:49,177 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-02-17 03:39:49,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 03:39:49,204 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 6 conjunts are in the unsatisfiable core [2023-02-17 03:39:49,207 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 03:39:49,219 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 03:39:49,219 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 03:39:49,263 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 03:39:49,263 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1678162710] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 03:39:49,263 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 03:39:49,263 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 11 [2023-02-17 03:39:49,264 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1067433392] [2023-02-17 03:39:49,264 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 03:39:49,264 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-02-17 03:39:49,264 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 03:39:49,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-02-17 03:39:49,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2023-02-17 03:39:49,265 INFO L87 Difference]: Start difference. First operand 293 states and 373 transitions. Second operand has 12 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 8 states have internal predecessors, (31), 4 states have call successors, (4), 4 states have call predecessors, (4), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 03:39:49,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 03:39:49,431 INFO L93 Difference]: Finished difference Result 591 states and 792 transitions. [2023-02-17 03:39:49,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-02-17 03:39:49,431 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 8 states have internal predecessors, (31), 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 19 [2023-02-17 03:39:49,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 03:39:49,434 INFO L225 Difference]: With dead ends: 591 [2023-02-17 03:39:49,434 INFO L226 Difference]: Without dead ends: 590 [2023-02-17 03:39:49,435 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=104, Invalid=238, Unknown=0, NotChecked=0, Total=342 [2023-02-17 03:39:49,436 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 156 mSDsluCounter, 171 mSDsCounter, 0 mSdLazyCounter, 160 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 159 SdHoareTripleChecker+Valid, 203 SdHoareTripleChecker+Invalid, 217 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 160 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-17 03:39:49,437 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [159 Valid, 203 Invalid, 217 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 160 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-17 03:39:49,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 590 states. [2023-02-17 03:39:49,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 590 to 521. [2023-02-17 03:39:49,460 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) [2023-02-17 03:39:49,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 521 states to 521 states and 649 transitions. [2023-02-17 03:39:49,463 INFO L78 Accepts]: Start accepts. Automaton has 521 states and 649 transitions. Word has length 19 [2023-02-17 03:39:49,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 03:39:49,463 INFO L495 AbstractCegarLoop]: Abstraction has 521 states and 649 transitions. [2023-02-17 03:39:49,463 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 8 states have internal predecessors, (31), 4 states have call successors, (4), 4 states have call predecessors, (4), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 03:39:49,463 INFO L276 IsEmpty]: Start isEmpty. Operand 521 states and 649 transitions. [2023-02-17 03:39:49,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-02-17 03:39:49,468 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 03:39:49,468 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 03:39:49,481 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-02-17 03:39:49,673 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 [2023-02-17 03:39:49,673 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2023-02-17 03:39:49,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 03:39:49,674 INFO L85 PathProgramCache]: Analyzing trace with hash 1106403678, now seen corresponding path program 1 times [2023-02-17 03:39:49,674 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 03:39:49,674 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1479533434] [2023-02-17 03:39:49,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 03:39:49,674 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 03:39:49,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 03:39:49,701 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-02-17 03:39:49,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 03:39:49,714 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-17 03:39:49,714 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 03:39:49,715 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1479533434] [2023-02-17 03:39:49,715 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1479533434] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 03:39:49,715 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1103661961] [2023-02-17 03:39:49,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 03:39:49,715 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 03:39:49,715 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 03:39:49,716 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-17 03:39:49,752 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-02-17 03:39:49,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 03:39:49,799 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 4 conjunts are in the unsatisfiable core [2023-02-17 03:39:49,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 03:39:49,826 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-17 03:39:49,826 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-17 03:39:49,826 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1103661961] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 03:39:49,827 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-02-17 03:39:49,827 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 10 [2023-02-17 03:39:49,828 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [431636994] [2023-02-17 03:39:49,829 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 03:39:49,829 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-17 03:39:49,829 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 03:39:49,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-17 03:39:49,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2023-02-17 03:39:49,833 INFO L87 Difference]: Start difference. First operand 521 states and 649 transitions. Second operand has 5 states, 3 states have (on average 6.333333333333333) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-17 03:39:49,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 03:39:49,907 INFO L93 Difference]: Finished difference Result 562 states and 696 transitions. [2023-02-17 03:39:49,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-02-17 03:39:49,908 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 3 states have (on average 6.333333333333333) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 24 [2023-02-17 03:39:49,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 03:39:49,910 INFO L225 Difference]: With dead ends: 562 [2023-02-17 03:39:49,910 INFO L226 Difference]: Without dead ends: 561 [2023-02-17 03:39:49,911 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2023-02-17 03:39:49,911 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 43 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-17 03:39:49,912 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 98 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-17 03:39:49,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 561 states. [2023-02-17 03:39:49,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 561 to 520. [2023-02-17 03:39:49,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 520 states, 407 states have (on average 1.194103194103194) internal successors, (486), 413 states have internal predecessors, (486), 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) [2023-02-17 03:39:49,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 520 states to 520 states and 645 transitions. [2023-02-17 03:39:49,957 INFO L78 Accepts]: Start accepts. Automaton has 520 states and 645 transitions. Word has length 24 [2023-02-17 03:39:49,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 03:39:49,958 INFO L495 AbstractCegarLoop]: Abstraction has 520 states and 645 transitions. [2023-02-17 03:39:49,958 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 3 states have (on average 6.333333333333333) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-17 03:39:49,959 INFO L276 IsEmpty]: Start isEmpty. Operand 520 states and 645 transitions. [2023-02-17 03:39:49,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-02-17 03:39:49,960 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 03:39:49,960 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 03:39:49,965 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-02-17 03:39:50,165 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 [2023-02-17 03:39:50,165 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2023-02-17 03:39:50,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 03:39:50,165 INFO L85 PathProgramCache]: Analyzing trace with hash -61224288, now seen corresponding path program 1 times [2023-02-17 03:39:50,165 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 03:39:50,165 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1973575901] [2023-02-17 03:39:50,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 03:39:50,166 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 03:39:50,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 03:39:50,231 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-02-17 03:39:50,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 03:39:50,242 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-17 03:39:50,243 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 03:39:50,243 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1973575901] [2023-02-17 03:39:50,243 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1973575901] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 03:39:50,243 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1711523739] [2023-02-17 03:39:50,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 03:39:50,243 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 03:39:50,243 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 03:39:50,244 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-17 03:39:50,277 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-02-17 03:39:50,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 03:39:50,293 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 10 conjunts are in the unsatisfiable core [2023-02-17 03:39:50,294 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 03:39:50,338 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-17 03:39:50,338 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 03:39:50,425 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-17 03:39:50,425 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1711523739] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 03:39:50,425 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 03:39:50,425 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 19 [2023-02-17 03:39:50,426 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1873630556] [2023-02-17 03:39:50,427 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 03:39:50,427 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-02-17 03:39:50,428 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 03:39:50,428 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-02-17 03:39:50,428 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=299, Unknown=0, NotChecked=0, Total=342 [2023-02-17 03:39:50,429 INFO L87 Difference]: Start difference. First operand 520 states and 645 transitions. Second operand has 19 states, 17 states have (on average 3.235294117647059) internal successors, (55), 16 states have internal predecessors, (55), 8 states have call successors, (9), 4 states have call predecessors, (9), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-17 03:39:50,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 03:39:50,761 INFO L93 Difference]: Finished difference Result 1284 states and 1790 transitions. [2023-02-17 03:39:50,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-02-17 03:39:50,761 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 17 states have (on average 3.235294117647059) internal successors, (55), 16 states have internal predecessors, (55), 8 states have call successors, (9), 4 states have call predecessors, (9), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 25 [2023-02-17 03:39:50,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 03:39:50,766 INFO L225 Difference]: With dead ends: 1284 [2023-02-17 03:39:50,767 INFO L226 Difference]: Without dead ends: 894 [2023-02-17 03:39:50,769 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 42 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=218, Invalid=904, Unknown=0, NotChecked=0, Total=1122 [2023-02-17 03:39:50,785 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 250 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 466 mSolverCounterSat, 94 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 250 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 560 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 466 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-17 03:39:50,786 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [250 Valid, 91 Invalid, 560 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [94 Valid, 466 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-17 03:39:50,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 894 states. [2023-02-17 03:39:50,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 894 to 694. [2023-02-17 03:39:50,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 694 states, 541 states have (on average 1.1903881700554528) internal successors, (644), 564 states have internal predecessors, (644), 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) [2023-02-17 03:39:50,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 694 states to 694 states and 852 transitions. [2023-02-17 03:39:50,847 INFO L78 Accepts]: Start accepts. Automaton has 694 states and 852 transitions. Word has length 25 [2023-02-17 03:39:50,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 03:39:50,847 INFO L495 AbstractCegarLoop]: Abstraction has 694 states and 852 transitions. [2023-02-17 03:39:50,848 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 17 states have (on average 3.235294117647059) internal successors, (55), 16 states have internal predecessors, (55), 8 states have call successors, (9), 4 states have call predecessors, (9), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-17 03:39:50,848 INFO L276 IsEmpty]: Start isEmpty. Operand 694 states and 852 transitions. [2023-02-17 03:39:50,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-02-17 03:39:50,849 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 03:39:50,849 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 03:39:50,865 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-02-17 03:39:51,054 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 [2023-02-17 03:39:51,055 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ackermannErr6ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2023-02-17 03:39:51,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 03:39:51,055 INFO L85 PathProgramCache]: Analyzing trace with hash 1298021223, now seen corresponding path program 1 times [2023-02-17 03:39:51,055 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 03:39:51,055 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [211667500] [2023-02-17 03:39:51,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 03:39:51,056 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 03:39:51,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 03:39:51,092 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-02-17 03:39:51,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 03:39:51,107 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-02-17 03:39:51,107 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 03:39:51,107 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [211667500] [2023-02-17 03:39:51,107 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [211667500] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 03:39:51,107 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1644425930] [2023-02-17 03:39:51,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 03:39:51,107 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 03:39:51,108 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 03:39:51,109 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-17 03:39:51,156 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-02-17 03:39:51,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 03:39:51,168 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 8 conjunts are in the unsatisfiable core [2023-02-17 03:39:51,169 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 03:39:51,203 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-17 03:39:51,203 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 03:39:51,258 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-17 03:39:51,258 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1644425930] provided 1 perfect and 1 imperfect interpolant sequences [2023-02-17 03:39:51,258 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-02-17 03:39:51,258 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 6] total 13 [2023-02-17 03:39:51,258 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1752344578] [2023-02-17 03:39:51,258 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 03:39:51,259 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-02-17 03:39:51,259 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 03:39:51,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-02-17 03:39:51,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2023-02-17 03:39:51,259 INFO L87 Difference]: Start difference. First operand 694 states and 852 transitions. Second operand has 7 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 states have internal predecessors, (23), 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) [2023-02-17 03:39:51,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 03:39:51,361 INFO L93 Difference]: Finished difference Result 769 states and 977 transitions. [2023-02-17 03:39:51,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-02-17 03:39:51,362 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 states have internal predecessors, (23), 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 27 [2023-02-17 03:39:51,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 03:39:51,369 INFO L225 Difference]: With dead ends: 769 [2023-02-17 03:39:51,370 INFO L226 Difference]: Without dead ends: 768 [2023-02-17 03:39:51,370 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 47 SyntacticMatches, 5 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2023-02-17 03:39:51,371 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 46 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 121 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-17 03:39:51,371 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 107 Invalid, 132 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 121 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-17 03:39:51,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 768 states. [2023-02-17 03:39:51,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 768 to 712. [2023-02-17 03:39:51,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 712 states, 559 states have (on average 1.1896243291592128) internal successors, (665), 579 states have internal predecessors, (665), 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) [2023-02-17 03:39:51,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 712 states to 712 states and 873 transitions. [2023-02-17 03:39:51,417 INFO L78 Accepts]: Start accepts. Automaton has 712 states and 873 transitions. Word has length 27 [2023-02-17 03:39:51,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 03:39:51,417 INFO L495 AbstractCegarLoop]: Abstraction has 712 states and 873 transitions. [2023-02-17 03:39:51,417 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 states have internal predecessors, (23), 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) [2023-02-17 03:39:51,417 INFO L276 IsEmpty]: Start isEmpty. Operand 712 states and 873 transitions. [2023-02-17 03:39:51,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2023-02-17 03:39:51,418 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 03:39:51,418 INFO L195 NwaCegarLoop]: trace histogram [4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 03:39:51,435 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-02-17 03:39:51,618 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 [2023-02-17 03:39:51,619 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2023-02-17 03:39:51,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 03:39:51,619 INFO L85 PathProgramCache]: Analyzing trace with hash -722353775, now seen corresponding path program 1 times [2023-02-17 03:39:51,619 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 03:39:51,619 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [386873108] [2023-02-17 03:39:51,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 03:39:51,619 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 03:39:51,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 03:39:51,659 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-02-17 03:39:51,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 03:39:51,680 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-02-17 03:39:51,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 03:39:51,697 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-02-17 03:39:51,698 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 03:39:51,698 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [386873108] [2023-02-17 03:39:51,698 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [386873108] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 03:39:51,698 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1486481192] [2023-02-17 03:39:51,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 03:39:51,698 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 03:39:51,698 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 03:39:51,699 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-17 03:39:51,701 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-02-17 03:39:51,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 03:39:51,732 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 9 conjunts are in the unsatisfiable core [2023-02-17 03:39:51,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 03:39:51,753 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-02-17 03:39:51,753 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 03:39:51,827 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-02-17 03:39:51,827 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1486481192] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 03:39:51,827 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 03:39:51,827 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2023-02-17 03:39:51,828 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [71104635] [2023-02-17 03:39:51,828 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 03:39:51,828 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-02-17 03:39:51,828 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 03:39:51,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-02-17 03:39:51,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2023-02-17 03:39:51,829 INFO L87 Difference]: Start difference. First operand 712 states and 873 transitions. Second operand has 18 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 14 states have internal predecessors, (43), 3 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (5), 4 states have call predecessors, (5), 1 states have call successors, (5) [2023-02-17 03:39:52,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 03:39:52,102 INFO L93 Difference]: Finished difference Result 1137 states and 1677 transitions. [2023-02-17 03:39:52,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-02-17 03:39:52,103 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 14 states have internal predecessors, (43), 3 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (5), 4 states have call predecessors, (5), 1 states have call successors, (5) Word has length 34 [2023-02-17 03:39:52,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 03:39:52,107 INFO L225 Difference]: With dead ends: 1137 [2023-02-17 03:39:52,107 INFO L226 Difference]: Without dead ends: 1135 [2023-02-17 03:39:52,108 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 62 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=188, Invalid=682, Unknown=0, NotChecked=0, Total=870 [2023-02-17 03:39:52,109 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 155 mSDsluCounter, 170 mSDsCounter, 0 mSdLazyCounter, 352 mSolverCounterSat, 141 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 155 SdHoareTripleChecker+Valid, 196 SdHoareTripleChecker+Invalid, 493 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 141 IncrementalHoareTripleChecker+Valid, 352 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-17 03:39:52,109 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [155 Valid, 196 Invalid, 493 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [141 Valid, 352 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-17 03:39:52,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1135 states. [2023-02-17 03:39:52,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1135 to 966. [2023-02-17 03:39:52,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 966 states, 727 states have (on average 1.1760660247592847) internal successors, (855), 758 states have internal predecessors, (855), 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) [2023-02-17 03:39:52,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 966 states to 966 states and 1300 transitions. [2023-02-17 03:39:52,167 INFO L78 Accepts]: Start accepts. Automaton has 966 states and 1300 transitions. Word has length 34 [2023-02-17 03:39:52,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 03:39:52,168 INFO L495 AbstractCegarLoop]: Abstraction has 966 states and 1300 transitions. [2023-02-17 03:39:52,168 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 14 states have internal predecessors, (43), 3 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (5), 4 states have call predecessors, (5), 1 states have call successors, (5) [2023-02-17 03:39:52,168 INFO L276 IsEmpty]: Start isEmpty. Operand 966 states and 1300 transitions. [2023-02-17 03:39:52,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2023-02-17 03:39:52,170 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 03:39:52,170 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 03:39:52,177 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-02-17 03:39:52,375 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 [2023-02-17 03:39:52,375 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ackermannErr6ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2023-02-17 03:39:52,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 03:39:52,376 INFO L85 PathProgramCache]: Analyzing trace with hash -1979265987, now seen corresponding path program 2 times [2023-02-17 03:39:52,376 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 03:39:52,376 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1604891747] [2023-02-17 03:39:52,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 03:39:52,376 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 03:39:52,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 03:39:52,486 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-02-17 03:39:52,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 03:39:52,503 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-02-17 03:39:52,503 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 03:39:52,503 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1604891747] [2023-02-17 03:39:52,503 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1604891747] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 03:39:52,503 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1932298325] [2023-02-17 03:39:52,503 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-17 03:39:52,503 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 03:39:52,503 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 03:39:52,516 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-17 03:39:52,545 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-02-17 03:39:52,587 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-17 03:39:52,588 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-17 03:39:52,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 12 conjunts are in the unsatisfiable core [2023-02-17 03:39:52,589 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 03:39:52,605 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-02-17 03:39:52,605 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 03:39:52,664 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 4 proven. 14 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-02-17 03:39:52,664 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1932298325] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 03:39:52,664 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 03:39:52,664 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2023-02-17 03:39:52,664 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1190564824] [2023-02-17 03:39:52,664 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 03:39:52,665 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-02-17 03:39:52,665 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 03:39:52,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-02-17 03:39:52,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2023-02-17 03:39:52,666 INFO L87 Difference]: Start difference. First operand 966 states and 1300 transitions. Second operand has 19 states, 16 states have (on average 2.9375) internal successors, (47), 15 states have internal predecessors, (47), 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) [2023-02-17 03:39:52,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 03:39:52,871 INFO L93 Difference]: Finished difference Result 1163 states and 1554 transitions. [2023-02-17 03:39:52,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-02-17 03:39:52,871 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 16 states have (on average 2.9375) internal successors, (47), 15 states have internal predecessors, (47), 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 35 [2023-02-17 03:39:52,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 03:39:52,875 INFO L225 Difference]: With dead ends: 1163 [2023-02-17 03:39:52,875 INFO L226 Difference]: Without dead ends: 1162 [2023-02-17 03:39:52,876 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 61 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=238, Invalid=754, Unknown=0, NotChecked=0, Total=992 [2023-02-17 03:39:52,877 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 254 mSDsluCounter, 126 mSDsCounter, 0 mSdLazyCounter, 214 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 254 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 297 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 214 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-17 03:39:52,877 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [254 Valid, 146 Invalid, 297 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 214 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-17 03:39:52,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1162 states. [2023-02-17 03:39:52,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1162 to 1019. [2023-02-17 03:39:52,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1019 states, 769 states have (on average 1.1768530559167751) internal successors, (905), 796 states have internal predecessors, (905), 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) [2023-02-17 03:39:52,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1019 states to 1019 states and 1361 transitions. [2023-02-17 03:39:52,931 INFO L78 Accepts]: Start accepts. Automaton has 1019 states and 1361 transitions. Word has length 35 [2023-02-17 03:39:52,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 03:39:52,932 INFO L495 AbstractCegarLoop]: Abstraction has 1019 states and 1361 transitions. [2023-02-17 03:39:52,932 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 16 states have (on average 2.9375) internal successors, (47), 15 states have internal predecessors, (47), 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) [2023-02-17 03:39:52,932 INFO L276 IsEmpty]: Start isEmpty. Operand 1019 states and 1361 transitions. [2023-02-17 03:39:52,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2023-02-17 03:39:52,933 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 03:39:52,933 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 03:39:52,940 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-02-17 03:39:53,140 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 [2023-02-17 03:39:53,143 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ackermannErr6ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2023-02-17 03:39:53,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 03:39:53,143 INFO L85 PathProgramCache]: Analyzing trace with hash 1607744024, now seen corresponding path program 1 times [2023-02-17 03:39:53,143 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 03:39:53,143 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [936110480] [2023-02-17 03:39:53,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 03:39:53,144 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 03:39:53,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 03:39:53,169 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-02-17 03:39:53,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 03:39:53,182 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-02-17 03:39:53,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 03:39:53,196 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 14 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-02-17 03:39:53,197 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 03:39:53,197 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [936110480] [2023-02-17 03:39:53,197 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [936110480] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 03:39:53,197 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1503049417] [2023-02-17 03:39:53,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 03:39:53,197 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 03:39:53,198 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 03:39:53,198 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-17 03:39:53,200 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-02-17 03:39:53,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 03:39:53,229 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 9 conjunts are in the unsatisfiable core [2023-02-17 03:39:53,230 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 03:39:53,259 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 12 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-02-17 03:39:53,259 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 03:39:53,319 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-02-17 03:39:53,319 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1503049417] provided 1 perfect and 1 imperfect interpolant sequences [2023-02-17 03:39:53,319 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-02-17 03:39:53,319 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8, 8] total 17 [2023-02-17 03:39:53,319 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1536647233] [2023-02-17 03:39:53,320 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 03:39:53,320 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-02-17 03:39:53,320 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 03:39:53,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-02-17 03:39:53,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2023-02-17 03:39:53,321 INFO L87 Difference]: Start difference. First operand 1019 states and 1361 transitions. Second operand has 9 states, 8 states have (on average 3.5) internal successors, (28), 7 states have internal predecessors, (28), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-17 03:39:53,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 03:39:53,487 INFO L93 Difference]: Finished difference Result 1129 states and 1564 transitions. [2023-02-17 03:39:53,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-02-17 03:39:53,488 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 3.5) internal successors, (28), 7 states have internal predecessors, (28), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 36 [2023-02-17 03:39:53,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 03:39:53,492 INFO L225 Difference]: With dead ends: 1129 [2023-02-17 03:39:53,492 INFO L226 Difference]: Without dead ends: 1128 [2023-02-17 03:39:53,493 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 60 SyntacticMatches, 6 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=100, Invalid=550, Unknown=0, NotChecked=0, Total=650 [2023-02-17 03:39:53,493 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 50 mSDsluCounter, 133 mSDsCounter, 0 mSdLazyCounter, 205 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 166 SdHoareTripleChecker+Invalid, 232 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 205 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-17 03:39:53,493 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 166 Invalid, 232 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 205 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-17 03:39:53,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1128 states. [2023-02-17 03:39:53,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1128 to 1027. [2023-02-17 03:39:53,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1027 states, 777 states have (on average 1.1711711711711712) internal successors, (910), 800 states have internal predecessors, (910), 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) [2023-02-17 03:39:53,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1027 states to 1027 states and 1310 transitions. [2023-02-17 03:39:53,559 INFO L78 Accepts]: Start accepts. Automaton has 1027 states and 1310 transitions. Word has length 36 [2023-02-17 03:39:53,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 03:39:53,560 INFO L495 AbstractCegarLoop]: Abstraction has 1027 states and 1310 transitions. [2023-02-17 03:39:53,561 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 3.5) internal successors, (28), 7 states have internal predecessors, (28), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-17 03:39:53,562 INFO L276 IsEmpty]: Start isEmpty. Operand 1027 states and 1310 transitions. [2023-02-17 03:39:53,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-02-17 03:39:53,563 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 03:39:53,563 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1] [2023-02-17 03:39:53,578 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-02-17 03:39:53,767 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 [2023-02-17 03:39:53,768 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ackermannErr6ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2023-02-17 03:39:53,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 03:39:53,769 INFO L85 PathProgramCache]: Analyzing trace with hash -1390366252, now seen corresponding path program 2 times [2023-02-17 03:39:53,769 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 03:39:53,769 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [381732676] [2023-02-17 03:39:53,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 03:39:53,770 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 03:39:53,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 03:39:53,868 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 03:39:53,868 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 03:39:53,869 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [381732676] [2023-02-17 03:39:53,869 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [381732676] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 03:39:53,869 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1021277433] [2023-02-17 03:39:53,869 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-17 03:39:53,869 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 03:39:53,869 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 03:39:53,870 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-17 03:39:53,884 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-02-17 03:39:53,914 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-17 03:39:53,914 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-17 03:39:53,915 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 12 conjunts are in the unsatisfiable core [2023-02-17 03:39:53,918 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 03:39:53,955 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 03:39:53,956 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 03:39:54,043 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 03:39:54,044 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1021277433] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 03:39:54,044 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 03:39:54,044 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 23 [2023-02-17 03:39:54,044 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [647429611] [2023-02-17 03:39:54,044 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 03:39:54,045 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-02-17 03:39:54,045 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 03:39:54,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-02-17 03:39:54,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=416, Unknown=0, NotChecked=0, Total=552 [2023-02-17 03:39:54,045 INFO L87 Difference]: Start difference. First operand 1027 states and 1310 transitions. Second operand has 24 states, 21 states have (on average 3.4761904761904763) internal successors, (73), 14 states have internal predecessors, (73), 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) [2023-02-17 03:39:54,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 03:39:54,488 INFO L93 Difference]: Finished difference Result 2044 states and 2749 transitions. [2023-02-17 03:39:54,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2023-02-17 03:39:54,489 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 21 states have (on average 3.4761904761904763) internal successors, (73), 14 states have internal predecessors, (73), 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 43 [2023-02-17 03:39:54,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 03:39:54,495 INFO L225 Difference]: With dead ends: 2044 [2023-02-17 03:39:54,496 INFO L226 Difference]: Without dead ends: 2043 [2023-02-17 03:39:54,497 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 67 SyntacticMatches, 8 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 376 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=554, Invalid=1252, Unknown=0, NotChecked=0, Total=1806 [2023-02-17 03:39:54,497 INFO L413 NwaCegarLoop]: 46 mSDtfsCounter, 430 mSDsluCounter, 405 mSDsCounter, 0 mSdLazyCounter, 570 mSolverCounterSat, 119 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 433 SdHoareTripleChecker+Valid, 451 SdHoareTripleChecker+Invalid, 689 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 119 IncrementalHoareTripleChecker+Valid, 570 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-17 03:39:54,498 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [433 Valid, 451 Invalid, 689 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [119 Valid, 570 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-17 03:39:54,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2043 states. [2023-02-17 03:39:54,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2043 to 1748. [2023-02-17 03:39:54,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1748 states, 1315 states have (on average 1.1460076045627376) internal successors, (1507), 1367 states have internal predecessors, (1507), 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) [2023-02-17 03:39:54,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1748 states to 1748 states and 2190 transitions. [2023-02-17 03:39:54,582 INFO L78 Accepts]: Start accepts. Automaton has 1748 states and 2190 transitions. Word has length 43 [2023-02-17 03:39:54,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 03:39:54,583 INFO L495 AbstractCegarLoop]: Abstraction has 1748 states and 2190 transitions. [2023-02-17 03:39:54,583 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 21 states have (on average 3.4761904761904763) internal successors, (73), 14 states have internal predecessors, (73), 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) [2023-02-17 03:39:54,583 INFO L276 IsEmpty]: Start isEmpty. Operand 1748 states and 2190 transitions. [2023-02-17 03:39:54,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2023-02-17 03:39:54,584 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 03:39:54,584 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 03:39:54,604 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-02-17 03:39:54,789 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 [2023-02-17 03:39:54,789 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ackermannErr6ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2023-02-17 03:39:54,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 03:39:54,790 INFO L85 PathProgramCache]: Analyzing trace with hash -1058043410, now seen corresponding path program 2 times [2023-02-17 03:39:54,790 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 03:39:54,790 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2123189602] [2023-02-17 03:39:54,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 03:39:54,790 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 03:39:54,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 03:39:54,840 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-02-17 03:39:54,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 03:39:54,854 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-02-17 03:39:54,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 03:39:54,869 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 26 proven. 8 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-02-17 03:39:54,870 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 03:39:54,870 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2123189602] [2023-02-17 03:39:54,870 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2123189602] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 03:39:54,870 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [827447504] [2023-02-17 03:39:54,870 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-17 03:39:54,870 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 03:39:54,870 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 03:39:54,888 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-17 03:39:54,957 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-02-17 03:39:54,966 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-17 03:39:54,966 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-17 03:39:54,967 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 11 conjunts are in the unsatisfiable core [2023-02-17 03:39:54,968 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 03:39:55,004 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 24 proven. 10 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-02-17 03:39:55,004 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 03:39:55,081 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 28 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-02-17 03:39:55,082 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [827447504] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 03:39:55,082 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 03:39:55,082 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 21 [2023-02-17 03:39:55,082 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1170542325] [2023-02-17 03:39:55,082 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 03:39:55,083 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-02-17 03:39:55,083 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 03:39:55,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-02-17 03:39:55,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2023-02-17 03:39:55,083 INFO L87 Difference]: Start difference. First operand 1748 states and 2190 transitions. Second operand has 22 states, 21 states have (on average 2.9047619047619047) internal successors, (61), 16 states have internal predecessors, (61), 5 states have call successors, (7), 5 states have call predecessors, (7), 5 states have return successors, (5), 4 states have call predecessors, (5), 1 states have call successors, (5) [2023-02-17 03:39:55,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 03:39:55,763 INFO L93 Difference]: Finished difference Result 3771 states and 5462 transitions. [2023-02-17 03:39:55,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-02-17 03:39:55,763 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 2.9047619047619047) internal successors, (61), 16 states have internal predecessors, (61), 5 states have call successors, (7), 5 states have call predecessors, (7), 5 states have return successors, (5), 4 states have call predecessors, (5), 1 states have call successors, (5) Word has length 44 [2023-02-17 03:39:55,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 03:39:55,773 INFO L225 Difference]: With dead ends: 3771 [2023-02-17 03:39:55,773 INFO L226 Difference]: Without dead ends: 2618 [2023-02-17 03:39:55,779 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 78 SyntacticMatches, 8 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 497 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=582, Invalid=1968, Unknown=0, NotChecked=0, Total=2550 [2023-02-17 03:39:55,780 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 235 mSDsluCounter, 255 mSDsCounter, 0 mSdLazyCounter, 614 mSolverCounterSat, 303 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 235 SdHoareTripleChecker+Valid, 291 SdHoareTripleChecker+Invalid, 917 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 303 IncrementalHoareTripleChecker+Valid, 614 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-17 03:39:55,780 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [235 Valid, 291 Invalid, 917 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [303 Valid, 614 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-17 03:39:55,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2618 states. [2023-02-17 03:39:55,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2618 to 1927. [2023-02-17 03:39:55,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1927 states, 1452 states have (on average 1.1398071625344353) internal successors, (1655), 1510 states have internal predecessors, (1655), 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) [2023-02-17 03:39:55,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1927 states to 1927 states and 2396 transitions. [2023-02-17 03:39:55,884 INFO L78 Accepts]: Start accepts. Automaton has 1927 states and 2396 transitions. Word has length 44 [2023-02-17 03:39:55,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 03:39:55,884 INFO L495 AbstractCegarLoop]: Abstraction has 1927 states and 2396 transitions. [2023-02-17 03:39:55,884 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 2.9047619047619047) internal successors, (61), 16 states have internal predecessors, (61), 5 states have call successors, (7), 5 states have call predecessors, (7), 5 states have return successors, (5), 4 states have call predecessors, (5), 1 states have call successors, (5) [2023-02-17 03:39:55,884 INFO L276 IsEmpty]: Start isEmpty. Operand 1927 states and 2396 transitions. [2023-02-17 03:39:55,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2023-02-17 03:39:55,885 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 03:39:55,886 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 03:39:55,903 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2023-02-17 03:39:56,090 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 [2023-02-17 03:39:56,091 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ackermannErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2023-02-17 03:39:56,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 03:39:56,091 INFO L85 PathProgramCache]: Analyzing trace with hash 407823314, now seen corresponding path program 1 times [2023-02-17 03:39:56,091 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 03:39:56,091 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1748980162] [2023-02-17 03:39:56,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 03:39:56,092 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 03:39:56,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 03:39:56,124 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2023-02-17 03:39:56,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 03:39:56,134 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 38 proven. 5 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-02-17 03:39:56,134 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 03:39:56,134 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1748980162] [2023-02-17 03:39:56,135 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1748980162] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 03:39:56,135 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [402068507] [2023-02-17 03:39:56,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 03:39:56,135 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 03:39:56,135 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 03:39:56,136 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-17 03:39:56,151 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-02-17 03:39:56,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 03:39:56,190 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 9 conjunts are in the unsatisfiable core [2023-02-17 03:39:56,191 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 03:39:56,216 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 52 proven. 3 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-02-17 03:39:56,216 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 03:39:56,267 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 53 proven. 2 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-02-17 03:39:56,267 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [402068507] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 03:39:56,267 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 03:39:56,267 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 16 [2023-02-17 03:39:56,267 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1879810579] [2023-02-17 03:39:56,267 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 03:39:56,268 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-02-17 03:39:56,268 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 03:39:56,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-02-17 03:39:56,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2023-02-17 03:39:56,268 INFO L87 Difference]: Start difference. First operand 1927 states and 2396 transitions. Second operand has 16 states, 16 states have (on average 3.375) internal successors, (54), 13 states have internal predecessors, (54), 6 states have call successors, (9), 5 states have call predecessors, (9), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-02-17 03:39:56,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 03:39:56,620 INFO L93 Difference]: Finished difference Result 2463 states and 3242 transitions. [2023-02-17 03:39:56,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-02-17 03:39:56,621 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.375) internal successors, (54), 13 states have internal predecessors, (54), 6 states have call successors, (9), 5 states have call predecessors, (9), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 51 [2023-02-17 03:39:56,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 03:39:56,629 INFO L225 Difference]: With dead ends: 2463 [2023-02-17 03:39:56,629 INFO L226 Difference]: Without dead ends: 2363 [2023-02-17 03:39:56,630 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 89 SyntacticMatches, 7 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 247 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=334, Invalid=926, Unknown=0, NotChecked=0, Total=1260 [2023-02-17 03:39:56,631 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 160 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 465 mSolverCounterSat, 124 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 160 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 589 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 124 IncrementalHoareTripleChecker+Valid, 465 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-17 03:39:56,631 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [160 Valid, 85 Invalid, 589 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [124 Valid, 465 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-17 03:39:56,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2363 states. [2023-02-17 03:39:56,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2363 to 1867. [2023-02-17 03:39:56,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1867 states, 1405 states have (on average 1.1330960854092527) internal successors, (1592), 1467 states have internal predecessors, (1592), 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) [2023-02-17 03:39:56,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1867 states to 1867 states and 2321 transitions. [2023-02-17 03:39:56,730 INFO L78 Accepts]: Start accepts. Automaton has 1867 states and 2321 transitions. Word has length 51 [2023-02-17 03:39:56,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 03:39:56,731 INFO L495 AbstractCegarLoop]: Abstraction has 1867 states and 2321 transitions. [2023-02-17 03:39:56,731 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.375) internal successors, (54), 13 states have internal predecessors, (54), 6 states have call successors, (9), 5 states have call predecessors, (9), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-02-17 03:39:56,731 INFO L276 IsEmpty]: Start isEmpty. Operand 1867 states and 2321 transitions. [2023-02-17 03:39:56,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2023-02-17 03:39:56,732 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 03:39:56,732 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 03:39:56,739 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-02-17 03:39:56,937 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 [2023-02-17 03:39:56,938 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ackermannErr6ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2023-02-17 03:39:56,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 03:39:56,938 INFO L85 PathProgramCache]: Analyzing trace with hash 357169897, now seen corresponding path program 3 times [2023-02-17 03:39:56,938 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 03:39:56,938 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [183112780] [2023-02-17 03:39:56,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 03:39:56,939 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 03:39:56,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 03:39:57,009 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2023-02-17 03:39:57,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 03:39:57,024 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 3 proven. 71 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-02-17 03:39:57,025 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 03:39:57,025 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [183112780] [2023-02-17 03:39:57,025 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [183112780] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 03:39:57,025 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [575812959] [2023-02-17 03:39:57,025 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-17 03:39:57,025 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 03:39:57,025 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 03:39:57,026 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-17 03:39:57,063 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-02-17 03:39:57,101 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2023-02-17 03:39:57,101 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-17 03:39:57,102 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 16 conjunts are in the unsatisfiable core [2023-02-17 03:39:57,103 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 03:39:57,146 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 3 proven. 71 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-02-17 03:39:57,146 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 03:39:57,272 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 5 proven. 69 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-02-17 03:39:57,273 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [575812959] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 03:39:57,273 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 03:39:57,273 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 26 [2023-02-17 03:39:57,273 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2120428725] [2023-02-17 03:39:57,273 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 03:39:57,274 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-02-17 03:39:57,274 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 03:39:57,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-02-17 03:39:57,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=582, Unknown=0, NotChecked=0, Total=702 [2023-02-17 03:39:57,275 INFO L87 Difference]: Start difference. First operand 1867 states and 2321 transitions. Second operand has 27 states, 24 states have (on average 3.125) internal successors, (75), 19 states have internal predecessors, (75), 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) [2023-02-17 03:39:57,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 03:39:57,706 INFO L93 Difference]: Finished difference Result 2157 states and 2766 transitions. [2023-02-17 03:39:57,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2023-02-17 03:39:57,706 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 24 states have (on average 3.125) internal successors, (75), 19 states have internal predecessors, (75), 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 51 [2023-02-17 03:39:57,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 03:39:57,724 INFO L225 Difference]: With dead ends: 2157 [2023-02-17 03:39:57,724 INFO L226 Difference]: Without dead ends: 2156 [2023-02-17 03:39:57,726 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 81 SyntacticMatches, 11 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 533 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=634, Invalid=1916, Unknown=0, NotChecked=0, Total=2550 [2023-02-17 03:39:57,727 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 468 mSDsluCounter, 163 mSDsCounter, 0 mSdLazyCounter, 350 mSolverCounterSat, 144 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 468 SdHoareTripleChecker+Valid, 182 SdHoareTripleChecker+Invalid, 494 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 144 IncrementalHoareTripleChecker+Valid, 350 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-17 03:39:57,727 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [468 Valid, 182 Invalid, 494 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [144 Valid, 350 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-17 03:39:57,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2156 states. [2023-02-17 03:39:57,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2156 to 1895. [2023-02-17 03:39:57,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1895 states, 1428 states have (on average 1.1330532212885154) internal successors, (1618), 1490 states have internal predecessors, (1618), 291 states have call successors, (291), 105 states have call predecessors, (291), 172 states have return successors, (443), 299 states have call predecessors, (443), 245 states have call successors, (443) [2023-02-17 03:39:57,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1895 states to 1895 states and 2352 transitions. [2023-02-17 03:39:57,928 INFO L78 Accepts]: Start accepts. Automaton has 1895 states and 2352 transitions. Word has length 51 [2023-02-17 03:39:57,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 03:39:57,928 INFO L495 AbstractCegarLoop]: Abstraction has 1895 states and 2352 transitions. [2023-02-17 03:39:57,928 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 24 states have (on average 3.125) internal successors, (75), 19 states have internal predecessors, (75), 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) [2023-02-17 03:39:57,928 INFO L276 IsEmpty]: Start isEmpty. Operand 1895 states and 2352 transitions. [2023-02-17 03:39:57,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2023-02-17 03:39:57,930 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 03:39:57,930 INFO L195 NwaCegarLoop]: trace histogram [6, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 03:39:57,944 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-02-17 03:39:58,130 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 [2023-02-17 03:39:58,130 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2023-02-17 03:39:58,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 03:39:58,131 INFO L85 PathProgramCache]: Analyzing trace with hash 843839239, now seen corresponding path program 1 times [2023-02-17 03:39:58,131 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 03:39:58,131 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [40924095] [2023-02-17 03:39:58,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 03:39:58,131 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 03:39:58,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 03:39:58,222 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-02-17 03:39:58,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 03:39:58,254 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-02-17 03:39:58,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 03:39:58,279 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-02-17 03:39:58,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 03:39:58,296 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2023-02-17 03:39:58,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 03:39:58,316 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 21 proven. 16 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-02-17 03:39:58,317 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 03:39:58,317 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [40924095] [2023-02-17 03:39:58,317 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [40924095] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 03:39:58,317 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [747262356] [2023-02-17 03:39:58,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 03:39:58,317 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 03:39:58,317 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 03:39:58,318 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-17 03:39:58,321 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-02-17 03:39:58,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 03:39:58,355 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 15 conjunts are in the unsatisfiable core [2023-02-17 03:39:58,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 03:39:58,386 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 14 proven. 18 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2023-02-17 03:39:58,387 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 03:39:58,513 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 18 proven. 19 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-02-17 03:39:58,513 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [747262356] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 03:39:58,514 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 03:39:58,514 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 13] total 26 [2023-02-17 03:39:58,514 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1510505332] [2023-02-17 03:39:58,514 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 03:39:58,514 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-02-17 03:39:58,514 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 03:39:58,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-02-17 03:39:58,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=614, Unknown=0, NotChecked=0, Total=702 [2023-02-17 03:39:58,515 INFO L87 Difference]: Start difference. First operand 1895 states and 2352 transitions. Second operand has 27 states, 26 states have (on average 2.230769230769231) internal successors, (58), 21 states have internal predecessors, (58), 5 states have call successors, (7), 3 states have call predecessors, (7), 8 states have return successors, (9), 8 states have call predecessors, (9), 3 states have call successors, (9) [2023-02-17 03:39:59,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 03:39:59,496 INFO L93 Difference]: Finished difference Result 4390 states and 7701 transitions. [2023-02-17 03:39:59,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2023-02-17 03:39:59,497 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 2.230769230769231) internal successors, (58), 21 states have internal predecessors, (58), 5 states have call successors, (7), 3 states have call predecessors, (7), 8 states have return successors, (9), 8 states have call predecessors, (9), 3 states have call successors, (9) Word has length 53 [2023-02-17 03:39:59,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 03:39:59,536 INFO L225 Difference]: With dead ends: 4390 [2023-02-17 03:39:59,544 INFO L226 Difference]: Without dead ends: 4388 [2023-02-17 03:39:59,562 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 95 SyntacticMatches, 6 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1693 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1154, Invalid=5008, Unknown=0, NotChecked=0, Total=6162 [2023-02-17 03:39:59,563 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 318 mSDsluCounter, 228 mSDsCounter, 0 mSdLazyCounter, 866 mSolverCounterSat, 693 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 331 SdHoareTripleChecker+Valid, 253 SdHoareTripleChecker+Invalid, 1559 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 693 IncrementalHoareTripleChecker+Valid, 866 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-02-17 03:39:59,563 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [331 Valid, 253 Invalid, 1559 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [693 Valid, 866 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-02-17 03:39:59,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4388 states. [2023-02-17 03:39:59,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4388 to 3212. [2023-02-17 03:39:59,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3212 states, 2254 states have (on average 1.1029281277728482) internal successors, (2486), 2319 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) [2023-02-17 03:40:00,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3212 states to 3212 states and 6170 transitions. [2023-02-17 03:40:00,021 INFO L78 Accepts]: Start accepts. Automaton has 3212 states and 6170 transitions. Word has length 53 [2023-02-17 03:40:00,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 03:40:00,025 INFO L495 AbstractCegarLoop]: Abstraction has 3212 states and 6170 transitions. [2023-02-17 03:40:00,025 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 2.230769230769231) internal successors, (58), 21 states have internal predecessors, (58), 5 states have call successors, (7), 3 states have call predecessors, (7), 8 states have return successors, (9), 8 states have call predecessors, (9), 3 states have call successors, (9) [2023-02-17 03:40:00,025 INFO L276 IsEmpty]: Start isEmpty. Operand 3212 states and 6170 transitions. [2023-02-17 03:40:00,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2023-02-17 03:40:00,027 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 03:40:00,027 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1] [2023-02-17 03:40:00,047 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2023-02-17 03:40:00,232 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 [2023-02-17 03:40:00,232 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ackermannErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2023-02-17 03:40:00,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 03:40:00,232 INFO L85 PathProgramCache]: Analyzing trace with hash 2013961680, now seen corresponding path program 1 times [2023-02-17 03:40:00,232 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 03:40:00,232 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1875575520] [2023-02-17 03:40:00,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 03:40:00,233 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 03:40:00,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 03:40:00,313 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 111 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-02-17 03:40:00,313 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 03:40:00,313 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1875575520] [2023-02-17 03:40:00,313 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1875575520] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 03:40:00,313 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [976117316] [2023-02-17 03:40:00,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 03:40:00,314 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 03:40:00,314 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 03:40:00,328 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-17 03:40:00,342 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-02-17 03:40:00,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 03:40:00,380 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 18 conjunts are in the unsatisfiable core [2023-02-17 03:40:00,381 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 03:40:00,425 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 111 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-02-17 03:40:00,425 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 03:40:00,498 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 111 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-02-17 03:40:00,498 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [976117316] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 03:40:00,498 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 03:40:00,498 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 23 [2023-02-17 03:40:00,498 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [716218089] [2023-02-17 03:40:00,498 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 03:40:00,498 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-02-17 03:40:00,498 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 03:40:00,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-02-17 03:40:00,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=416, Unknown=0, NotChecked=0, Total=552 [2023-02-17 03:40:00,499 INFO L87 Difference]: Start difference. First operand 3212 states and 6170 transitions. Second operand has 24 states, 23 states have (on average 3.652173913043478) internal successors, (84), 14 states have internal predecessors, (84), 10 states have call successors, (16), 10 states have call predecessors, (16), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 03:40:01,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 03:40:01,542 INFO L93 Difference]: Finished difference Result 9358 states and 17609 transitions. [2023-02-17 03:40:01,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2023-02-17 03:40:01,543 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 3.652173913043478) internal successors, (84), 14 states have internal predecessors, (84), 10 states have call successors, (16), 10 states have call predecessors, (16), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2023-02-17 03:40:01,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 03:40:01,608 INFO L225 Difference]: With dead ends: 9358 [2023-02-17 03:40:01,608 INFO L226 Difference]: Without dead ends: 9357 [2023-02-17 03:40:01,616 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 91 SyntacticMatches, 17 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 439 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=554, Invalid=1252, Unknown=0, NotChecked=0, Total=1806 [2023-02-17 03:40:01,616 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 722 mSDsluCounter, 310 mSDsCounter, 0 mSdLazyCounter, 465 mSolverCounterSat, 291 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 728 SdHoareTripleChecker+Valid, 340 SdHoareTripleChecker+Invalid, 756 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 291 IncrementalHoareTripleChecker+Valid, 465 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-02-17 03:40:01,617 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [728 Valid, 340 Invalid, 756 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [291 Valid, 465 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-02-17 03:40:01,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9357 states. [2023-02-17 03:40:02,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9357 to 8660. [2023-02-17 03:40:02,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8660 states, 6118 states have (on average 1.104609349460608) internal successors, (6758), 6273 states have internal predecessors, (6758), 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) [2023-02-17 03:40:02,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8660 states to 8660 states and 16472 transitions. [2023-02-17 03:40:02,251 INFO L78 Accepts]: Start accepts. Automaton has 8660 states and 16472 transitions. Word has length 57 [2023-02-17 03:40:02,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 03:40:02,251 INFO L495 AbstractCegarLoop]: Abstraction has 8660 states and 16472 transitions. [2023-02-17 03:40:02,252 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 3.652173913043478) internal successors, (84), 14 states have internal predecessors, (84), 10 states have call successors, (16), 10 states have call predecessors, (16), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 03:40:02,252 INFO L276 IsEmpty]: Start isEmpty. Operand 8660 states and 16472 transitions. [2023-02-17 03:40:02,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2023-02-17 03:40:02,254 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 03:40:02,254 INFO L195 NwaCegarLoop]: trace histogram [6, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 03:40:02,260 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2023-02-17 03:40:02,458 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 [2023-02-17 03:40:02,459 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ackermannErr6ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2023-02-17 03:40:02,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 03:40:02,460 INFO L85 PathProgramCache]: Analyzing trace with hash -814290418, now seen corresponding path program 1 times [2023-02-17 03:40:02,460 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 03:40:02,460 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1397041912] [2023-02-17 03:40:02,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 03:40:02,460 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 03:40:02,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 03:40:02,568 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-02-17 03:40:02,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 03:40:02,601 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-02-17 03:40:02,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 03:40:02,624 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-02-17 03:40:02,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 03:40:02,642 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2023-02-17 03:40:02,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 03:40:02,661 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 36 proven. 6 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-02-17 03:40:02,661 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 03:40:02,661 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1397041912] [2023-02-17 03:40:02,661 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1397041912] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 03:40:02,661 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1034631540] [2023-02-17 03:40:02,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 03:40:02,662 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 03:40:02,662 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 03:40:02,663 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-17 03:40:02,708 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-02-17 03:40:02,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 03:40:02,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 15 conjunts are in the unsatisfiable core [2023-02-17 03:40:02,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 03:40:02,766 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 27 proven. 10 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2023-02-17 03:40:02,766 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 03:40:02,929 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 40 proven. 2 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-02-17 03:40:02,929 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1034631540] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 03:40:02,930 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 03:40:02,930 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 13] total 26 [2023-02-17 03:40:02,930 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [771513499] [2023-02-17 03:40:02,930 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 03:40:02,930 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-02-17 03:40:02,930 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 03:40:02,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-02-17 03:40:02,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=608, Unknown=0, NotChecked=0, Total=702 [2023-02-17 03:40:02,931 INFO L87 Difference]: Start difference. First operand 8660 states and 16472 transitions. Second operand has 27 states, 26 states have (on average 2.3846153846153846) internal successors, (62), 21 states have internal predecessors, (62), 5 states have call successors, (7), 3 states have call predecessors, (7), 8 states have return successors, (9), 8 states have call predecessors, (9), 3 states have call successors, (9) [2023-02-17 03:40:05,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 03:40:05,053 INFO L93 Difference]: Finished difference Result 30195 states and 100270 transitions. [2023-02-17 03:40:05,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2023-02-17 03:40:05,055 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 2.3846153846153846) internal successors, (62), 21 states have internal predecessors, (62), 5 states have call successors, (7), 3 states have call predecessors, (7), 8 states have return successors, (9), 8 states have call predecessors, (9), 3 states have call successors, (9) Word has length 55 [2023-02-17 03:40:05,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 03:40:05,542 INFO L225 Difference]: With dead ends: 30195 [2023-02-17 03:40:05,542 INFO L226 Difference]: Without dead ends: 22200 [2023-02-17 03:40:05,661 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 95 SyntacticMatches, 10 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 824 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=905, Invalid=3517, Unknown=0, NotChecked=0, Total=4422 [2023-02-17 03:40:05,662 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 158 mSDsluCounter, 269 mSDsCounter, 0 mSdLazyCounter, 804 mSolverCounterSat, 250 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 158 SdHoareTripleChecker+Valid, 305 SdHoareTripleChecker+Invalid, 1054 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 250 IncrementalHoareTripleChecker+Valid, 804 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-02-17 03:40:05,662 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [158 Valid, 305 Invalid, 1054 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [250 Valid, 804 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-02-17 03:40:05,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22200 states. [2023-02-17 03:40:07,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22200 to 17548. [2023-02-17 03:40:07,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17548 states, 11658 states have (on average 1.0686224052153028) internal successors, (12458), 11785 states have internal predecessors, (12458), 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) [2023-02-17 03:40:07,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17548 states to 17548 states and 59714 transitions. [2023-02-17 03:40:07,892 INFO L78 Accepts]: Start accepts. Automaton has 17548 states and 59714 transitions. Word has length 55 [2023-02-17 03:40:07,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 03:40:07,893 INFO L495 AbstractCegarLoop]: Abstraction has 17548 states and 59714 transitions. [2023-02-17 03:40:07,893 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 2.3846153846153846) internal successors, (62), 21 states have internal predecessors, (62), 5 states have call successors, (7), 3 states have call predecessors, (7), 8 states have return successors, (9), 8 states have call predecessors, (9), 3 states have call successors, (9) [2023-02-17 03:40:07,893 INFO L276 IsEmpty]: Start isEmpty. Operand 17548 states and 59714 transitions. [2023-02-17 03:40:07,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2023-02-17 03:40:07,896 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 03:40:07,896 INFO L195 NwaCegarLoop]: trace histogram [8, 6, 5, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 03:40:07,900 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2023-02-17 03:40:08,099 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 [2023-02-17 03:40:08,100 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ackermannErr6ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2023-02-17 03:40:08,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 03:40:08,100 INFO L85 PathProgramCache]: Analyzing trace with hash -1106576793, now seen corresponding path program 2 times [2023-02-17 03:40:08,100 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 03:40:08,100 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1343379070] [2023-02-17 03:40:08,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 03:40:08,101 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 03:40:08,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 03:40:08,284 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-02-17 03:40:08,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 03:40:08,318 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-02-17 03:40:08,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 03:40:08,494 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-02-17 03:40:08,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 03:40:08,526 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-02-17 03:40:08,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 03:40:08,548 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2023-02-17 03:40:08,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 03:40:08,584 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 70 proven. 16 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2023-02-17 03:40:08,584 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 03:40:08,584 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1343379070] [2023-02-17 03:40:08,584 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1343379070] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 03:40:08,584 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [321686889] [2023-02-17 03:40:08,584 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-17 03:40:08,584 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 03:40:08,584 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 03:40:08,595 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-17 03:40:08,598 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-02-17 03:40:08,643 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-17 03:40:08,643 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-17 03:40:08,644 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 19 conjunts are in the unsatisfiable core [2023-02-17 03:40:08,645 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 03:40:08,750 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 59 proven. 22 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2023-02-17 03:40:08,750 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 03:40:09,002 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 78 proven. 8 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2023-02-17 03:40:09,002 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [321686889] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 03:40:09,002 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 03:40:09,003 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 16] total 32 [2023-02-17 03:40:09,003 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [582430086] [2023-02-17 03:40:09,003 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 03:40:09,004 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-02-17 03:40:09,005 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 03:40:09,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-02-17 03:40:09,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=930, Unknown=0, NotChecked=0, Total=1056 [2023-02-17 03:40:09,006 INFO L87 Difference]: Start difference. First operand 17548 states and 59714 transitions. Second operand has 33 states, 32 states have (on average 2.4375) internal successors, (78), 23 states have internal predecessors, (78), 7 states have call successors, (9), 5 states have call predecessors, (9), 8 states have return successors, (11), 10 states have call predecessors, (11), 3 states have call successors, (11) [2023-02-17 03:40:10,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 03:40:10,651 INFO L93 Difference]: Finished difference Result 29333 states and 97052 transitions. [2023-02-17 03:40:10,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2023-02-17 03:40:10,652 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 32 states have (on average 2.4375) internal successors, (78), 23 states have internal predecessors, (78), 7 states have call successors, (9), 5 states have call predecessors, (9), 8 states have return successors, (11), 10 states have call predecessors, (11), 3 states have call successors, (11) Word has length 72 [2023-02-17 03:40:10,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 03:40:10,791 INFO L225 Difference]: With dead ends: 29333 [2023-02-17 03:40:10,791 INFO L226 Difference]: Without dead ends: 12445 [2023-02-17 03:40:11,125 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 126 SyntacticMatches, 14 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 643 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=750, Invalid=3032, Unknown=0, NotChecked=0, Total=3782 [2023-02-17 03:40:11,125 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 229 mSDsluCounter, 260 mSDsCounter, 0 mSdLazyCounter, 633 mSolverCounterSat, 216 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 229 SdHoareTripleChecker+Valid, 299 SdHoareTripleChecker+Invalid, 849 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 216 IncrementalHoareTripleChecker+Valid, 633 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-17 03:40:11,126 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [229 Valid, 299 Invalid, 849 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [216 Valid, 633 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-17 03:40:11,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12445 states. [2023-02-17 03:40:11,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12445 to 11049. [2023-02-17 03:40:11,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11049 states, 7827 states have (on average 1.109237255653507) internal successors, (8682), 8130 states have internal predecessors, (8682), 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) [2023-02-17 03:40:11,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11049 states to 11049 states and 16599 transitions. [2023-02-17 03:40:11,987 INFO L78 Accepts]: Start accepts. Automaton has 11049 states and 16599 transitions. Word has length 72 [2023-02-17 03:40:11,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 03:40:11,988 INFO L495 AbstractCegarLoop]: Abstraction has 11049 states and 16599 transitions. [2023-02-17 03:40:11,988 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 32 states have (on average 2.4375) internal successors, (78), 23 states have internal predecessors, (78), 7 states have call successors, (9), 5 states have call predecessors, (9), 8 states have return successors, (11), 10 states have call predecessors, (11), 3 states have call successors, (11) [2023-02-17 03:40:11,989 INFO L276 IsEmpty]: Start isEmpty. Operand 11049 states and 16599 transitions. [2023-02-17 03:40:11,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2023-02-17 03:40:11,991 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 03:40:11,992 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 7, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 03:40:12,000 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-02-17 03:40:12,196 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 [2023-02-17 03:40:12,197 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ackermannErr6ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2023-02-17 03:40:12,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 03:40:12,197 INFO L85 PathProgramCache]: Analyzing trace with hash 2104709525, now seen corresponding path program 4 times [2023-02-17 03:40:12,198 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 03:40:12,198 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1166951542] [2023-02-17 03:40:12,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 03:40:12,198 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 03:40:12,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 03:40:12,341 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2023-02-17 03:40:12,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 03:40:12,365 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 4 proven. 158 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-02-17 03:40:12,365 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 03:40:12,365 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1166951542] [2023-02-17 03:40:12,366 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1166951542] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 03:40:12,366 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [90505991] [2023-02-17 03:40:12,366 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-17 03:40:12,366 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 03:40:12,366 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 03:40:12,367 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-17 03:40:12,370 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-02-17 03:40:12,419 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-17 03:40:12,419 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-17 03:40:12,420 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 19 conjunts are in the unsatisfiable core [2023-02-17 03:40:12,421 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 03:40:12,459 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 103 proven. 4 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2023-02-17 03:40:12,459 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 03:40:12,475 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 103 proven. 4 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2023-02-17 03:40:12,475 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [90505991] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 03:40:12,475 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 03:40:12,475 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 6, 6] total 23 [2023-02-17 03:40:12,476 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2924028] [2023-02-17 03:40:12,476 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 03:40:12,476 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-02-17 03:40:12,477 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 03:40:12,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-02-17 03:40:12,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=430, Unknown=0, NotChecked=0, Total=506 [2023-02-17 03:40:12,477 INFO L87 Difference]: Start difference. First operand 11049 states and 16599 transitions. Second operand has 23 states, 22 states have (on average 3.5) internal successors, (77), 16 states have internal predecessors, (77), 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) [2023-02-17 03:40:13,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 03:40:13,336 INFO L93 Difference]: Finished difference Result 11583 states and 17379 transitions. [2023-02-17 03:40:13,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-02-17 03:40:13,337 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 3.5) internal successors, (77), 16 states have internal predecessors, (77), 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 67 [2023-02-17 03:40:13,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 03:40:13,375 INFO L225 Difference]: With dead ends: 11583 [2023-02-17 03:40:13,375 INFO L226 Difference]: Without dead ends: 9316 [2023-02-17 03:40:13,389 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 265 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=374, Invalid=1348, Unknown=0, NotChecked=0, Total=1722 [2023-02-17 03:40:13,392 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 289 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 329 mSolverCounterSat, 126 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 289 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 455 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 126 IncrementalHoareTripleChecker+Valid, 329 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-17 03:40:13,393 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [289 Valid, 86 Invalid, 455 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [126 Valid, 329 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-17 03:40:13,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9316 states. [2023-02-17 03:40:13,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9316 to 8750. [2023-02-17 03:40:13,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8750 states, 5956 states have (on average 1.0661517797179314) internal successors, (6350), 6082 states have internal predecessors, (6350), 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) [2023-02-17 03:40:13,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8750 states to 8750 states and 13768 transitions. [2023-02-17 03:40:13,930 INFO L78 Accepts]: Start accepts. Automaton has 8750 states and 13768 transitions. Word has length 67 [2023-02-17 03:40:13,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 03:40:13,930 INFO L495 AbstractCegarLoop]: Abstraction has 8750 states and 13768 transitions. [2023-02-17 03:40:13,931 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 3.5) internal successors, (77), 16 states have internal predecessors, (77), 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) [2023-02-17 03:40:13,931 INFO L276 IsEmpty]: Start isEmpty. Operand 8750 states and 13768 transitions. [2023-02-17 03:40:13,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2023-02-17 03:40:13,933 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 03:40:13,933 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 6, 6, 6, 5, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 03:40:13,945 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-02-17 03:40:14,137 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 [2023-02-17 03:40:14,137 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ackermannErr6ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2023-02-17 03:40:14,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 03:40:14,138 INFO L85 PathProgramCache]: Analyzing trace with hash 1935422832, now seen corresponding path program 3 times [2023-02-17 03:40:14,138 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 03:40:14,138 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [598120992] [2023-02-17 03:40:14,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 03:40:14,138 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 03:40:14,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 03:40:14,229 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-02-17 03:40:14,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 03:40:14,247 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-02-17 03:40:14,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 03:40:14,267 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 62 proven. 77 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-02-17 03:40:14,267 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 03:40:14,267 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [598120992] [2023-02-17 03:40:14,267 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [598120992] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 03:40:14,267 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [941270057] [2023-02-17 03:40:14,268 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-17 03:40:14,268 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 03:40:14,268 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 03:40:14,269 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-17 03:40:14,272 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-02-17 03:40:14,325 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2023-02-17 03:40:14,325 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-17 03:40:14,326 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 17 conjunts are in the unsatisfiable core [2023-02-17 03:40:14,327 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 03:40:14,401 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 60 proven. 79 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-02-17 03:40:14,401 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 03:40:14,573 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 64 proven. 75 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-02-17 03:40:14,573 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [941270057] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 03:40:14,573 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 03:40:14,573 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 33 [2023-02-17 03:40:14,573 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [566028088] [2023-02-17 03:40:14,573 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 03:40:14,573 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-02-17 03:40:14,573 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 03:40:14,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-02-17 03:40:14,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=949, Unknown=0, NotChecked=0, Total=1122 [2023-02-17 03:40:14,575 INFO L87 Difference]: Start difference. First operand 8750 states and 13768 transitions. Second operand has 34 states, 33 states have (on average 3.121212121212121) internal successors, (103), 22 states have internal predecessors, (103), 11 states have call successors, (13), 11 states have call predecessors, (13), 5 states have return successors, (5), 4 states have call predecessors, (5), 1 states have call successors, (5) [2023-02-17 03:40:15,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 03:40:15,376 INFO L93 Difference]: Finished difference Result 9401 states and 14766 transitions. [2023-02-17 03:40:15,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-02-17 03:40:15,377 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 3.121212121212121) internal successors, (103), 22 states have internal predecessors, (103), 11 states have call successors, (13), 11 states have call predecessors, (13), 5 states have return successors, (5), 4 states have call predecessors, (5), 1 states have call successors, (5) Word has length 68 [2023-02-17 03:40:15,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 03:40:15,413 INFO L225 Difference]: With dead ends: 9401 [2023-02-17 03:40:15,414 INFO L226 Difference]: Without dead ends: 9400 [2023-02-17 03:40:15,419 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 115 SyntacticMatches, 12 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 533 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=573, Invalid=1977, Unknown=0, NotChecked=0, Total=2550 [2023-02-17 03:40:15,419 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 241 mSDsluCounter, 266 mSDsCounter, 0 mSdLazyCounter, 553 mSolverCounterSat, 216 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 241 SdHoareTripleChecker+Valid, 297 SdHoareTripleChecker+Invalid, 769 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 216 IncrementalHoareTripleChecker+Valid, 553 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-17 03:40:15,420 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [241 Valid, 297 Invalid, 769 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [216 Valid, 553 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-17 03:40:15,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9400 states. [2023-02-17 03:40:15,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9400 to 8858. [2023-02-17 03:40:15,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8858 states, 6028 states have (on average 1.0623755806237558) internal successors, (6404), 6154 states have internal predecessors, (6404), 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) [2023-02-17 03:40:15,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8858 states to 8858 states and 13916 transitions. [2023-02-17 03:40:15,960 INFO L78 Accepts]: Start accepts. Automaton has 8858 states and 13916 transitions. Word has length 68 [2023-02-17 03:40:15,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 03:40:15,961 INFO L495 AbstractCegarLoop]: Abstraction has 8858 states and 13916 transitions. [2023-02-17 03:40:15,961 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 33 states have (on average 3.121212121212121) internal successors, (103), 22 states have internal predecessors, (103), 11 states have call successors, (13), 11 states have call predecessors, (13), 5 states have return successors, (5), 4 states have call predecessors, (5), 1 states have call successors, (5) [2023-02-17 03:40:15,961 INFO L276 IsEmpty]: Start isEmpty. Operand 8858 states and 13916 transitions. [2023-02-17 03:40:15,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2023-02-17 03:40:15,964 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 03:40:15,964 INFO L195 NwaCegarLoop]: trace histogram [9, 7, 5, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2023-02-17 03:40:15,970 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2023-02-17 03:40:16,168 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 [2023-02-17 03:40:16,168 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2023-02-17 03:40:16,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 03:40:16,169 INFO L85 PathProgramCache]: Analyzing trace with hash -1903746682, now seen corresponding path program 2 times [2023-02-17 03:40:16,169 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 03:40:16,169 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1243778827] [2023-02-17 03:40:16,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 03:40:16,169 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 03:40:16,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 03:40:16,212 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-02-17 03:40:16,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 03:40:16,240 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-02-17 03:40:16,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 03:40:16,277 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-02-17 03:40:16,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 03:40:16,308 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-02-17 03:40:16,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 03:40:16,318 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-02-17 03:40:16,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 03:40:16,320 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2023-02-17 03:40:16,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 03:40:16,323 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2023-02-17 03:40:16,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 03:40:16,325 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 85 proven. 24 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2023-02-17 03:40:16,325 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 03:40:16,325 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1243778827] [2023-02-17 03:40:16,325 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1243778827] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 03:40:16,325 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1961139176] [2023-02-17 03:40:16,326 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-17 03:40:16,326 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 03:40:16,326 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 03:40:16,327 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-17 03:40:16,329 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-02-17 03:40:16,387 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-17 03:40:16,387 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-17 03:40:16,388 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 7 conjunts are in the unsatisfiable core [2023-02-17 03:40:16,390 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 03:40:16,409 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 85 proven. 15 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2023-02-17 03:40:16,409 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 03:40:16,504 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 85 proven. 26 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2023-02-17 03:40:16,505 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1961139176] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 03:40:16,505 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 03:40:16,505 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 8] total 13 [2023-02-17 03:40:16,505 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2093741776] [2023-02-17 03:40:16,506 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 03:40:16,506 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-02-17 03:40:16,507 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 03:40:16,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-02-17 03:40:16,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2023-02-17 03:40:16,508 INFO L87 Difference]: Start difference. First operand 8858 states and 13916 transitions. Second operand has 13 states, 13 states have (on average 6.3076923076923075) internal successors, (82), 13 states have internal predecessors, (82), 12 states have call successors, (14), 2 states have call predecessors, (14), 7 states have return successors, (14), 6 states have call predecessors, (14), 11 states have call successors, (14) [2023-02-17 03:40:17,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 03:40:17,154 INFO L93 Difference]: Finished difference Result 17973 states and 31840 transitions. [2023-02-17 03:40:17,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-02-17 03:40:17,155 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 6.3076923076923075) internal successors, (82), 13 states have internal predecessors, (82), 12 states have call successors, (14), 2 states have call predecessors, (14), 7 states have return successors, (14), 6 states have call predecessors, (14), 11 states have call successors, (14) Word has length 81 [2023-02-17 03:40:17,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 03:40:17,200 INFO L225 Difference]: With dead ends: 17973 [2023-02-17 03:40:17,200 INFO L226 Difference]: Without dead ends: 9802 [2023-02-17 03:40:17,249 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 165 SyntacticMatches, 7 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=102, Invalid=204, Unknown=0, NotChecked=0, Total=306 [2023-02-17 03:40:17,249 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 70 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 135 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 169 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 135 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-17 03:40:17,250 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 108 Invalid, 169 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 135 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-17 03:40:17,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9802 states. [2023-02-17 03:40:17,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9802 to 8852. [2023-02-17 03:40:17,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8852 states, 6025 states have (on average 1.0624066390041493) internal successors, (6401), 6151 states have internal predecessors, (6401), 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) [2023-02-17 03:40:17,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8852 states to 8852 states and 13830 transitions. [2023-02-17 03:40:17,872 INFO L78 Accepts]: Start accepts. Automaton has 8852 states and 13830 transitions. Word has length 81 [2023-02-17 03:40:17,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 03:40:17,872 INFO L495 AbstractCegarLoop]: Abstraction has 8852 states and 13830 transitions. [2023-02-17 03:40:17,872 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 6.3076923076923075) internal successors, (82), 13 states have internal predecessors, (82), 12 states have call successors, (14), 2 states have call predecessors, (14), 7 states have return successors, (14), 6 states have call predecessors, (14), 11 states have call successors, (14) [2023-02-17 03:40:17,872 INFO L276 IsEmpty]: Start isEmpty. Operand 8852 states and 13830 transitions. [2023-02-17 03:40:17,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2023-02-17 03:40:17,876 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 03:40:17,877 INFO L195 NwaCegarLoop]: trace histogram [11, 9, 6, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2023-02-17 03:40:17,891 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2023-02-17 03:40:18,081 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 [2023-02-17 03:40:18,081 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2023-02-17 03:40:18,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 03:40:18,082 INFO L85 PathProgramCache]: Analyzing trace with hash -1307053986, now seen corresponding path program 3 times [2023-02-17 03:40:18,082 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 03:40:18,082 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [137845234] [2023-02-17 03:40:18,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 03:40:18,083 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 03:40:18,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 03:40:18,134 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-02-17 03:40:18,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 03:40:18,186 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-02-17 03:40:18,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 03:40:18,217 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-02-17 03:40:18,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 03:40:18,249 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-02-17 03:40:18,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 03:40:18,275 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-02-17 03:40:18,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 03:40:18,299 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-02-17 03:40:18,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 03:40:18,306 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2023-02-17 03:40:18,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 03:40:18,309 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2023-02-17 03:40:18,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 03:40:18,313 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2023-02-17 03:40:18,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 03:40:18,316 INFO L134 CoverageAnalysis]: Checked inductivity of 266 backedges. 117 proven. 45 refuted. 0 times theorem prover too weak. 104 trivial. 0 not checked. [2023-02-17 03:40:18,316 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 03:40:18,316 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [137845234] [2023-02-17 03:40:18,316 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [137845234] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 03:40:18,317 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1969136298] [2023-02-17 03:40:18,317 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-17 03:40:18,317 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 03:40:18,317 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 03:40:18,318 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-17 03:40:18,320 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-02-17 03:40:18,382 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2023-02-17 03:40:18,382 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-17 03:40:18,383 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 12 conjunts are in the unsatisfiable core [2023-02-17 03:40:18,384 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 03:40:18,414 INFO L134 CoverageAnalysis]: Checked inductivity of 266 backedges. 153 proven. 26 refuted. 0 times theorem prover too weak. 87 trivial. 0 not checked. [2023-02-17 03:40:18,414 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 03:40:18,578 INFO L134 CoverageAnalysis]: Checked inductivity of 266 backedges. 123 proven. 57 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2023-02-17 03:40:18,578 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1969136298] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 03:40:18,578 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 03:40:18,579 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 11] total 16 [2023-02-17 03:40:18,579 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [933370395] [2023-02-17 03:40:18,579 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 03:40:18,580 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-02-17 03:40:18,580 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 03:40:18,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-02-17 03:40:18,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2023-02-17 03:40:18,581 INFO L87 Difference]: Start difference. First operand 8852 states and 13830 transitions. Second operand has 16 states, 16 states have (on average 5.1875) internal successors, (83), 16 states have internal predecessors, (83), 9 states have call successors, (14), 2 states have call predecessors, (14), 7 states have return successors, (17), 5 states have call predecessors, (17), 9 states have call successors, (17) [2023-02-17 03:40:19,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 03:40:19,263 INFO L93 Difference]: Finished difference Result 20482 states and 41518 transitions. [2023-02-17 03:40:19,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-02-17 03:40:19,263 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 5.1875) internal successors, (83), 16 states have internal predecessors, (83), 9 states have call successors, (14), 2 states have call predecessors, (14), 7 states have return successors, (17), 5 states have call predecessors, (17), 9 states have call successors, (17) Word has length 100 [2023-02-17 03:40:19,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 03:40:19,331 INFO L225 Difference]: With dead ends: 20482 [2023-02-17 03:40:19,331 INFO L226 Difference]: Without dead ends: 12345 [2023-02-17 03:40:19,382 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 199 SyntacticMatches, 16 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=113, Invalid=267, Unknown=0, NotChecked=0, Total=380 [2023-02-17 03:40:19,383 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 55 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 160 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 203 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 160 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-17 03:40:19,383 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [62 Valid, 133 Invalid, 203 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 160 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-17 03:40:19,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12345 states. [2023-02-17 03:40:20,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12345 to 11980. [2023-02-17 03:40:20,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11980 states, 8084 states have (on average 1.053686293913904) internal successors, (8518), 8271 states have internal predecessors, (8518), 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) [2023-02-17 03:40:20,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11980 states to 11980 states and 19050 transitions. [2023-02-17 03:40:20,289 INFO L78 Accepts]: Start accepts. Automaton has 11980 states and 19050 transitions. Word has length 100 [2023-02-17 03:40:20,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 03:40:20,289 INFO L495 AbstractCegarLoop]: Abstraction has 11980 states and 19050 transitions. [2023-02-17 03:40:20,290 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 5.1875) internal successors, (83), 16 states have internal predecessors, (83), 9 states have call successors, (14), 2 states have call predecessors, (14), 7 states have return successors, (17), 5 states have call predecessors, (17), 9 states have call successors, (17) [2023-02-17 03:40:20,290 INFO L276 IsEmpty]: Start isEmpty. Operand 11980 states and 19050 transitions. [2023-02-17 03:40:20,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2023-02-17 03:40:20,295 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 03:40:20,295 INFO L195 NwaCegarLoop]: trace histogram [10, 8, 7, 7, 7, 6, 6, 6, 4, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 03:40:20,300 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2023-02-17 03:40:20,499 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 [2023-02-17 03:40:20,499 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ackermannErr6ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2023-02-17 03:40:20,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 03:40:20,500 INFO L85 PathProgramCache]: Analyzing trace with hash 1104252262, now seen corresponding path program 3 times [2023-02-17 03:40:20,500 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 03:40:20,500 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1720085367] [2023-02-17 03:40:20,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 03:40:20,500 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 03:40:20,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 03:40:20,725 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-02-17 03:40:20,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 03:40:20,758 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-02-17 03:40:20,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 03:40:20,778 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-02-17 03:40:20,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 03:40:20,802 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2023-02-17 03:40:20,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 03:40:20,827 INFO L134 CoverageAnalysis]: Checked inductivity of 227 backedges. 120 proven. 86 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-02-17 03:40:20,827 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 03:40:20,828 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1720085367] [2023-02-17 03:40:20,828 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1720085367] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 03:40:20,828 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [225897623] [2023-02-17 03:40:20,828 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-17 03:40:20,828 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 03:40:20,828 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 03:40:20,837 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-17 03:40:20,840 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-02-17 03:40:20,914 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2023-02-17 03:40:20,915 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-17 03:40:20,916 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 31 conjunts are in the unsatisfiable core [2023-02-17 03:40:20,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 03:40:20,993 INFO L134 CoverageAnalysis]: Checked inductivity of 227 backedges. 113 proven. 41 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2023-02-17 03:40:20,994 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 03:40:21,062 INFO L134 CoverageAnalysis]: Checked inductivity of 227 backedges. 142 proven. 13 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2023-02-17 03:40:21,063 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [225897623] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 03:40:21,063 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 03:40:21,063 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 7, 8] total 29 [2023-02-17 03:40:21,063 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [697377134] [2023-02-17 03:40:21,064 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 03:40:21,064 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-02-17 03:40:21,064 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 03:40:21,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-02-17 03:40:21,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=723, Unknown=0, NotChecked=0, Total=812 [2023-02-17 03:40:21,065 INFO L87 Difference]: Start difference. First operand 11980 states and 19050 transitions. Second operand has 29 states, 29 states have (on average 3.6551724137931036) internal successors, (106), 22 states have internal predecessors, (106), 11 states have call successors, (15), 7 states have call predecessors, (15), 7 states have return successors, (10), 9 states have call predecessors, (10), 4 states have call successors, (10) [2023-02-17 03:40:22,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 03:40:22,478 INFO L93 Difference]: Finished difference Result 20826 states and 35598 transitions. [2023-02-17 03:40:22,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2023-02-17 03:40:22,478 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 3.6551724137931036) internal successors, (106), 22 states have internal predecessors, (106), 11 states have call successors, (15), 7 states have call predecessors, (15), 7 states have return successors, (10), 9 states have call predecessors, (10), 4 states have call successors, (10) Word has length 87 [2023-02-17 03:40:22,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 03:40:22,530 INFO L225 Difference]: With dead ends: 20826 [2023-02-17 03:40:22,531 INFO L226 Difference]: Without dead ends: 10351 [2023-02-17 03:40:22,607 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 246 GetRequests, 177 SyntacticMatches, 4 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 814 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=983, Invalid=3439, Unknown=0, NotChecked=0, Total=4422 [2023-02-17 03:40:22,608 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 202 mSDsluCounter, 156 mSDsCounter, 0 mSdLazyCounter, 1097 mSolverCounterSat, 195 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 202 SdHoareTripleChecker+Valid, 177 SdHoareTripleChecker+Invalid, 1292 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 195 IncrementalHoareTripleChecker+Valid, 1097 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-02-17 03:40:22,608 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [202 Valid, 177 Invalid, 1292 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [195 Valid, 1097 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-02-17 03:40:22,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10351 states. [2023-02-17 03:40:23,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10351 to 8751. [2023-02-17 03:40:23,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8751 states, 5978 states have (on average 1.0463365674138507) internal successors, (6255), 6154 states have internal predecessors, (6255), 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) [2023-02-17 03:40:23,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8751 states to 8751 states and 12063 transitions. [2023-02-17 03:40:23,243 INFO L78 Accepts]: Start accepts. Automaton has 8751 states and 12063 transitions. Word has length 87 [2023-02-17 03:40:23,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 03:40:23,244 INFO L495 AbstractCegarLoop]: Abstraction has 8751 states and 12063 transitions. [2023-02-17 03:40:23,244 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 3.6551724137931036) internal successors, (106), 22 states have internal predecessors, (106), 11 states have call successors, (15), 7 states have call predecessors, (15), 7 states have return successors, (10), 9 states have call predecessors, (10), 4 states have call successors, (10) [2023-02-17 03:40:23,244 INFO L276 IsEmpty]: Start isEmpty. Operand 8751 states and 12063 transitions. [2023-02-17 03:40:23,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2023-02-17 03:40:23,249 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 03:40:23,249 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 11, 11, 11, 10, 10, 10, 1, 1, 1, 1, 1, 1] [2023-02-17 03:40:23,270 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2023-02-17 03:40:23,454 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 [2023-02-17 03:40:23,454 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ackermannErr6ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2023-02-17 03:40:23,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 03:40:23,455 INFO L85 PathProgramCache]: Analyzing trace with hash -133792040, now seen corresponding path program 3 times [2023-02-17 03:40:23,455 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 03:40:23,455 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1046778689] [2023-02-17 03:40:23,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 03:40:23,455 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 03:40:23,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 03:40:23,684 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 0 proven. 420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 03:40:23,684 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 03:40:23,685 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1046778689] [2023-02-17 03:40:23,685 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1046778689] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 03:40:23,685 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [142301581] [2023-02-17 03:40:23,685 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-17 03:40:23,685 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 03:40:23,685 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 03:40:23,686 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-17 03:40:23,713 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-02-17 03:40:23,760 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2023-02-17 03:40:23,760 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-17 03:40:23,761 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 24 conjunts are in the unsatisfiable core [2023-02-17 03:40:23,762 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 03:40:23,915 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 0 proven. 420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 03:40:23,915 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 03:40:24,323 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 0 proven. 420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 03:40:24,323 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [142301581] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 03:40:24,324 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 03:40:24,324 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 47 [2023-02-17 03:40:24,324 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [555065358] [2023-02-17 03:40:24,324 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 03:40:24,324 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2023-02-17 03:40:24,324 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 03:40:24,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2023-02-17 03:40:24,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=556, Invalid=1700, Unknown=0, NotChecked=0, Total=2256 [2023-02-17 03:40:24,326 INFO L87 Difference]: Start difference. First operand 8751 states and 12063 transitions. Second operand has 48 states, 45 states have (on average 3.488888888888889) internal successors, (157), 26 states have internal predecessors, (157), 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) [2023-02-17 03:40:25,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 03:40:25,980 INFO L93 Difference]: Finished difference Result 15928 states and 22083 transitions. [2023-02-17 03:40:25,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2023-02-17 03:40:25,981 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 45 states have (on average 3.488888888888889) internal successors, (157), 26 states have internal predecessors, (157), 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 91 [2023-02-17 03:40:25,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 03:40:26,040 INFO L225 Difference]: With dead ends: 15928 [2023-02-17 03:40:26,040 INFO L226 Difference]: Without dead ends: 15927 [2023-02-17 03:40:26,053 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 248 GetRequests, 139 SyntacticMatches, 20 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2101 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=2534, Invalid=5656, Unknown=0, NotChecked=0, Total=8190 [2023-02-17 03:40:26,054 INFO L413 NwaCegarLoop]: 67 mSDtfsCounter, 1052 mSDsluCounter, 611 mSDsCounter, 0 mSdLazyCounter, 867 mSolverCounterSat, 617 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1056 SdHoareTripleChecker+Valid, 678 SdHoareTripleChecker+Invalid, 1484 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 617 IncrementalHoareTripleChecker+Valid, 867 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-02-17 03:40:26,054 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1056 Valid, 678 Invalid, 1484 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [617 Valid, 867 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-02-17 03:40:26,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15927 states. [2023-02-17 03:40:27,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15927 to 15927. [2023-02-17 03:40:27,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15927 states, 10802 states have (on average 1.0456396963525274) internal successors, (11295), 11194 states have internal predecessors, (11295), 3103 states have call successors, (3103), 568 states have call predecessors, (3103), 2018 states have return successors, (7673), 4164 states have call predecessors, (7673), 3069 states have call successors, (7673) [2023-02-17 03:40:27,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15927 states to 15927 states and 22071 transitions. [2023-02-17 03:40:27,199 INFO L78 Accepts]: Start accepts. Automaton has 15927 states and 22071 transitions. Word has length 91 [2023-02-17 03:40:27,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 03:40:27,199 INFO L495 AbstractCegarLoop]: Abstraction has 15927 states and 22071 transitions. [2023-02-17 03:40:27,200 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 45 states have (on average 3.488888888888889) internal successors, (157), 26 states have internal predecessors, (157), 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) [2023-02-17 03:40:27,200 INFO L276 IsEmpty]: Start isEmpty. Operand 15927 states and 22071 transitions. [2023-02-17 03:40:27,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2023-02-17 03:40:27,203 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 03:40:27,203 INFO L195 NwaCegarLoop]: trace histogram [10, 8, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 03:40:27,226 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2023-02-17 03:40:27,407 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 [2023-02-17 03:40:27,407 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2023-02-17 03:40:27,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 03:40:27,407 INFO L85 PathProgramCache]: Analyzing trace with hash 1765664819, now seen corresponding path program 4 times [2023-02-17 03:40:27,408 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 03:40:27,408 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [50981549] [2023-02-17 03:40:27,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 03:40:27,408 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 03:40:27,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 03:40:27,492 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-02-17 03:40:27,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 03:40:27,543 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-02-17 03:40:27,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 03:40:27,584 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-02-17 03:40:27,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 03:40:27,613 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-02-17 03:40:27,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 03:40:27,629 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-02-17 03:40:27,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 03:40:27,646 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2023-02-17 03:40:27,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 03:40:27,664 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2023-02-17 03:40:27,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 03:40:27,669 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2023-02-17 03:40:27,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 03:40:27,675 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 51 proven. 69 refuted. 0 times theorem prover too weak. 101 trivial. 0 not checked. [2023-02-17 03:40:27,675 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 03:40:27,675 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [50981549] [2023-02-17 03:40:27,675 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [50981549] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 03:40:27,675 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [780494482] [2023-02-17 03:40:27,675 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-17 03:40:27,675 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 03:40:27,675 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 03:40:27,676 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-17 03:40:27,678 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-02-17 03:40:27,747 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-17 03:40:27,747 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-17 03:40:27,748 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 27 conjunts are in the unsatisfiable core [2023-02-17 03:40:27,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 03:40:27,825 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 34 proven. 71 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2023-02-17 03:40:27,825 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 03:40:28,163 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 42 proven. 93 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2023-02-17 03:40:28,163 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [780494482] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 03:40:28,163 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 03:40:28,163 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17, 23] total 42 [2023-02-17 03:40:28,163 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1336890709] [2023-02-17 03:40:28,163 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 03:40:28,163 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2023-02-17 03:40:28,164 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 03:40:28,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2023-02-17 03:40:28,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=207, Invalid=1599, Unknown=0, NotChecked=0, Total=1806 [2023-02-17 03:40:28,165 INFO L87 Difference]: Start difference. First operand 15927 states and 22071 transitions. Second operand has 43 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 33 states have internal predecessors, (80), 9 states have call successors, (11), 3 states have call predecessors, (11), 14 states have return successors, (17), 16 states have call predecessors, (17), 7 states have call successors, (17) [2023-02-17 03:40:31,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 03:40:31,869 INFO L93 Difference]: Finished difference Result 45665 states and 72940 transitions. [2023-02-17 03:40:31,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 143 states. [2023-02-17 03:40:31,869 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 33 states have internal predecessors, (80), 9 states have call successors, (11), 3 states have call predecessors, (11), 14 states have return successors, (17), 16 states have call predecessors, (17), 7 states have call successors, (17) Word has length 91 [2023-02-17 03:40:31,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 03:40:32,030 INFO L225 Difference]: With dead ends: 45665 [2023-02-17 03:40:32,031 INFO L226 Difference]: Without dead ends: 44563 [2023-02-17 03:40:32,061 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 356 GetRequests, 165 SyntacticMatches, 12 SemanticMatches, 179 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12220 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=5454, Invalid=27126, Unknown=0, NotChecked=0, Total=32580 [2023-02-17 03:40:32,062 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 349 mSDsluCounter, 240 mSDsCounter, 0 mSdLazyCounter, 1275 mSolverCounterSat, 907 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 360 SdHoareTripleChecker+Valid, 262 SdHoareTripleChecker+Invalid, 2182 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 907 IncrementalHoareTripleChecker+Valid, 1275 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-02-17 03:40:32,062 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [360 Valid, 262 Invalid, 2182 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [907 Valid, 1275 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-02-17 03:40:32,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44563 states. [2023-02-17 03:40:33,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44563 to 28637. [2023-02-17 03:40:34,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28637 states, 18550 states have (on average 1.0279784366576818) internal successors, (19069), 18925 states have internal predecessors, (19069), 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) [2023-02-17 03:40:34,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28637 states to 28637 states and 44545 transitions. [2023-02-17 03:40:34,113 INFO L78 Accepts]: Start accepts. Automaton has 28637 states and 44545 transitions. Word has length 91 [2023-02-17 03:40:34,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 03:40:34,113 INFO L495 AbstractCegarLoop]: Abstraction has 28637 states and 44545 transitions. [2023-02-17 03:40:34,113 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 33 states have internal predecessors, (80), 9 states have call successors, (11), 3 states have call predecessors, (11), 14 states have return successors, (17), 16 states have call predecessors, (17), 7 states have call successors, (17) [2023-02-17 03:40:34,114 INFO L276 IsEmpty]: Start isEmpty. Operand 28637 states and 44545 transitions. [2023-02-17 03:40:34,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2023-02-17 03:40:34,122 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 03:40:34,122 INFO L195 NwaCegarLoop]: trace histogram [20, 20, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1] [2023-02-17 03:40:34,134 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2023-02-17 03:40:34,326 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 [2023-02-17 03:40:34,327 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ackermannErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2023-02-17 03:40:34,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 03:40:34,327 INFO L85 PathProgramCache]: Analyzing trace with hash 951429890, now seen corresponding path program 2 times [2023-02-17 03:40:34,327 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 03:40:34,327 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [170883488] [2023-02-17 03:40:34,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 03:40:34,328 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 03:40:34,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 03:40:34,692 INFO L134 CoverageAnalysis]: Checked inductivity of 894 backedges. 0 proven. 867 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2023-02-17 03:40:34,692 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 03:40:34,693 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [170883488] [2023-02-17 03:40:34,693 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [170883488] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 03:40:34,694 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1606141526] [2023-02-17 03:40:34,694 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-17 03:40:34,694 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 03:40:34,694 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 03:40:34,710 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-17 03:40:34,712 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2023-02-17 03:40:34,805 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-17 03:40:34,805 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-17 03:40:34,806 INFO L263 TraceCheckSpWp]: Trace formula consists of 342 conjuncts, 42 conjunts are in the unsatisfiable core [2023-02-17 03:40:34,808 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 03:40:35,088 INFO L134 CoverageAnalysis]: Checked inductivity of 894 backedges. 0 proven. 867 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2023-02-17 03:40:35,088 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 03:40:35,565 INFO L134 CoverageAnalysis]: Checked inductivity of 894 backedges. 0 proven. 867 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2023-02-17 03:40:35,566 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1606141526] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 03:40:35,566 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 03:40:35,566 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 47 [2023-02-17 03:40:35,566 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1492969108] [2023-02-17 03:40:35,566 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 03:40:35,655 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2023-02-17 03:40:35,655 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 03:40:35,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2023-02-17 03:40:35,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=556, Invalid=1700, Unknown=0, NotChecked=0, Total=2256 [2023-02-17 03:40:35,656 INFO L87 Difference]: Start difference. First operand 28637 states and 44545 transitions. Second operand has 48 states, 47 states have (on average 4.340425531914893) internal successors, (204), 26 states have internal predecessors, (204), 22 states have call successors, (40), 22 states have call predecessors, (40), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 03:40:39,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 03:40:39,422 INFO L93 Difference]: Finished difference Result 64750 states and 101363 transitions. [2023-02-17 03:40:39,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2023-02-17 03:40:39,423 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 47 states have (on average 4.340425531914893) internal successors, (204), 26 states have internal predecessors, (204), 22 states have call successors, (40), 22 states have call predecessors, (40), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 141 [2023-02-17 03:40:39,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 03:40:39,660 INFO L225 Difference]: With dead ends: 64750 [2023-02-17 03:40:39,660 INFO L226 Difference]: Without dead ends: 64749 [2023-02-17 03:40:39,687 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 365 GetRequests, 229 SyntacticMatches, 47 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2560 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=2534, Invalid=5656, Unknown=0, NotChecked=0, Total=8190 [2023-02-17 03:40:39,687 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 2174 mSDsluCounter, 524 mSDsCounter, 0 mSdLazyCounter, 908 mSolverCounterSat, 873 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2177 SdHoareTripleChecker+Valid, 551 SdHoareTripleChecker+Invalid, 1781 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 873 IncrementalHoareTripleChecker+Valid, 908 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-02-17 03:40:39,687 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2177 Valid, 551 Invalid, 1781 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [873 Valid, 908 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-02-17 03:40:39,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64749 states. [2023-02-17 03:40:43,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64749 to 64697. [2023-02-17 03:40:43,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64697 states, 41998 states have (on average 1.0286442211533882) internal successors, (43201), 42865 states have internal predecessors, (43201), 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) [2023-02-17 03:40:43,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64697 states to 64697 states and 101341 transitions. [2023-02-17 03:40:43,771 INFO L78 Accepts]: Start accepts. Automaton has 64697 states and 101341 transitions. Word has length 141 [2023-02-17 03:40:43,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 03:40:43,772 INFO L495 AbstractCegarLoop]: Abstraction has 64697 states and 101341 transitions. [2023-02-17 03:40:43,772 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 47 states have (on average 4.340425531914893) internal successors, (204), 26 states have internal predecessors, (204), 22 states have call successors, (40), 22 states have call predecessors, (40), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 03:40:43,772 INFO L276 IsEmpty]: Start isEmpty. Operand 64697 states and 101341 transitions. [2023-02-17 03:40:43,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 243 [2023-02-17 03:40:43,790 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 03:40:43,790 INFO L195 NwaCegarLoop]: trace histogram [27, 20, 17, 16, 16, 16, 16, 15, 15, 7, 7, 7, 7, 7, 7, 6, 6, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1] [2023-02-17 03:40:43,797 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2023-02-17 03:40:43,995 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 [2023-02-17 03:40:43,995 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ackermannErr7ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2023-02-17 03:40:43,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 03:40:43,996 INFO L85 PathProgramCache]: Analyzing trace with hash -480353226, now seen corresponding path program 1 times [2023-02-17 03:40:43,996 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 03:40:43,997 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1758398673] [2023-02-17 03:40:43,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 03:40:43,997 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 03:40:44,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 03:40:44,191 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2023-02-17 03:40:44,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 03:40:44,283 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-02-17 03:40:44,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 03:40:44,356 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-02-17 03:40:44,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 03:40:44,376 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-02-17 03:40:44,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 03:40:44,396 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-02-17 03:40:44,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 03:40:44,408 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-02-17 03:40:44,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 03:40:44,420 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2023-02-17 03:40:44,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 03:40:44,433 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2023-02-17 03:40:44,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 03:40:44,477 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-02-17 03:40:44,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 03:40:44,512 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-02-17 03:40:44,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 03:40:44,538 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-02-17 03:40:44,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 03:40:44,558 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-02-17 03:40:44,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 03:40:44,572 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-02-17 03:40:44,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 03:40:44,573 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2023-02-17 03:40:44,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 03:40:44,575 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2023-02-17 03:40:44,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 03:40:44,577 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2023-02-17 03:40:44,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 03:40:44,579 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2023-02-17 03:40:44,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 03:40:44,581 INFO L134 CoverageAnalysis]: Checked inductivity of 1872 backedges. 688 proven. 214 refuted. 0 times theorem prover too weak. 970 trivial. 0 not checked. [2023-02-17 03:40:44,581 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 03:40:44,581 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1758398673] [2023-02-17 03:40:44,581 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1758398673] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 03:40:44,582 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [558622471] [2023-02-17 03:40:44,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 03:40:44,582 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 03:40:44,582 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 03:40:44,601 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) [2023-02-17 03:40:44,602 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2023-02-17 03:40:44,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 03:40:44,724 INFO L263 TraceCheckSpWp]: Trace formula consists of 568 conjuncts, 25 conjunts are in the unsatisfiable core [2023-02-17 03:40:44,727 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 03:40:44,801 INFO L134 CoverageAnalysis]: Checked inductivity of 1872 backedges. 676 proven. 216 refuted. 0 times theorem prover too weak. 980 trivial. 0 not checked. [2023-02-17 03:40:44,801 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 03:40:45,087 INFO L134 CoverageAnalysis]: Checked inductivity of 1872 backedges. 692 proven. 263 refuted. 0 times theorem prover too weak. 917 trivial. 0 not checked. [2023-02-17 03:40:45,087 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [558622471] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 03:40:45,087 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 03:40:45,087 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 21] total 27 [2023-02-17 03:40:45,087 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1539483120] [2023-02-17 03:40:45,088 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 03:40:45,088 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-02-17 03:40:45,088 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 03:40:45,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-02-17 03:40:45,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=589, Unknown=0, NotChecked=0, Total=702 [2023-02-17 03:40:45,089 INFO L87 Difference]: Start difference. First operand 64697 states and 101341 transitions. Second operand has 27 states, 27 states have (on average 4.555555555555555) internal successors, (123), 24 states have internal predecessors, (123), 16 states have call successors, (18), 2 states have call predecessors, (18), 14 states have return successors, (29), 12 states have call predecessors, (29), 15 states have call successors, (29) [2023-02-17 03:40:51,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 03:40:51,298 INFO L93 Difference]: Finished difference Result 152890 states and 310323 transitions. [2023-02-17 03:40:51,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-02-17 03:40:51,299 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 4.555555555555555) internal successors, (123), 24 states have internal predecessors, (123), 16 states have call successors, (18), 2 states have call predecessors, (18), 14 states have return successors, (29), 12 states have call predecessors, (29), 15 states have call successors, (29) Word has length 242 [2023-02-17 03:40:51,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 03:40:52,088 INFO L225 Difference]: With dead ends: 152890 [2023-02-17 03:40:52,088 INFO L226 Difference]: Without dead ends: 94897 [2023-02-17 03:40:52,665 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 561 GetRequests, 488 SyntacticMatches, 30 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 561 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=423, Invalid=1557, Unknown=0, NotChecked=0, Total=1980 [2023-02-17 03:40:52,667 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 110 mSDsluCounter, 246 mSDsCounter, 0 mSdLazyCounter, 557 mSolverCounterSat, 138 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 280 SdHoareTripleChecker+Invalid, 695 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 138 IncrementalHoareTripleChecker+Valid, 557 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-17 03:40:52,667 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [115 Valid, 280 Invalid, 695 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [138 Valid, 557 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-17 03:40:52,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94897 states.