./Ultimate.py --spec ../sv-benchmarks/c/properties/no-overflow.prp --file ../sv-benchmarks/c/recursive/Ackermann03.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/Ackermann03.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 c244f72db2906c596b7f122d769fc1464836d7d05d9227ee4269773d59ed10bd --- Real Ultimate output --- This is Ultimate 0.2.2-?-26d01a9 [2023-02-18 07:27:10,493 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-02-18 07:27:10,494 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-02-18 07:27:10,524 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-02-18 07:27:10,525 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-02-18 07:27:10,527 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-02-18 07:27:10,528 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-02-18 07:27:10,530 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-02-18 07:27:10,531 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-02-18 07:27:10,534 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-02-18 07:27:10,535 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-02-18 07:27:10,537 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-02-18 07:27:10,537 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-02-18 07:27:10,540 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-02-18 07:27:10,541 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-02-18 07:27:10,542 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-02-18 07:27:10,542 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-02-18 07:27:10,544 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-02-18 07:27:10,544 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-02-18 07:27:10,548 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-02-18 07:27:10,549 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-02-18 07:27:10,549 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-02-18 07:27:10,550 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-02-18 07:27:10,551 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-02-18 07:27:10,557 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-02-18 07:27:10,557 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-02-18 07:27:10,557 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-02-18 07:27:10,558 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-02-18 07:27:10,559 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-02-18 07:27:10,559 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-02-18 07:27:10,560 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-02-18 07:27:10,560 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-02-18 07:27:10,561 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-02-18 07:27:10,562 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-02-18 07:27:10,563 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-02-18 07:27:10,563 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-02-18 07:27:10,563 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-02-18 07:27:10,563 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-02-18 07:27:10,563 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-02-18 07:27:10,564 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-02-18 07:27:10,565 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-02-18 07:27:10,566 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Overflow-32bit-Automizer_Default.epf [2023-02-18 07:27:10,587 INFO L113 SettingsManager]: Loading preferences was successful [2023-02-18 07:27:10,587 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-02-18 07:27:10,587 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-02-18 07:27:10,588 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-02-18 07:27:10,588 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-02-18 07:27:10,588 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-02-18 07:27:10,589 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-02-18 07:27:10,589 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-02-18 07:27:10,589 INFO L138 SettingsManager]: * Use SBE=true [2023-02-18 07:27:10,589 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-02-18 07:27:10,590 INFO L138 SettingsManager]: * sizeof long=4 [2023-02-18 07:27:10,590 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-02-18 07:27:10,590 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-02-18 07:27:10,590 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-02-18 07:27:10,590 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-02-18 07:27:10,590 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-02-18 07:27:10,591 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-02-18 07:27:10,591 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-02-18 07:27:10,591 INFO L138 SettingsManager]: * Check absence of signed integer overflows=true [2023-02-18 07:27:10,591 INFO L138 SettingsManager]: * sizeof long double=12 [2023-02-18 07:27:10,591 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-02-18 07:27:10,591 INFO L138 SettingsManager]: * Use constant arrays=true [2023-02-18 07:27:10,591 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-02-18 07:27:10,592 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-02-18 07:27:10,592 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-02-18 07:27:10,592 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-02-18 07:27:10,592 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-18 07:27:10,592 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-02-18 07:27:10,592 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-02-18 07:27:10,592 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-02-18 07:27:10,593 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-02-18 07:27:10,593 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-02-18 07:27:10,593 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-02-18 07:27:10,593 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-02-18 07:27:10,593 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-02-18 07:27:10,593 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-02-18 07:27:10,593 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-02-18 07:27:10,594 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c244f72db2906c596b7f122d769fc1464836d7d05d9227ee4269773d59ed10bd [2023-02-18 07:27:10,753 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-02-18 07:27:10,766 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-02-18 07:27:10,767 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-02-18 07:27:10,768 INFO L271 PluginConnector]: Initializing CDTParser... [2023-02-18 07:27:10,769 INFO L275 PluginConnector]: CDTParser initialized [2023-02-18 07:27:10,780 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/recursive/Ackermann03.c [2023-02-18 07:27:11,847 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-02-18 07:27:11,988 INFO L351 CDTParser]: Found 1 translation units. [2023-02-18 07:27:11,989 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursive/Ackermann03.c [2023-02-18 07:27:11,992 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/98a781484/b3a2f6744c204aacb97d45c4b0ddb9da/FLAGf5d0347ab [2023-02-18 07:27:12,406 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/98a781484/b3a2f6744c204aacb97d45c4b0ddb9da [2023-02-18 07:27:12,408 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-02-18 07:27:12,409 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-02-18 07:27:12,409 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-02-18 07:27:12,410 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-02-18 07:27:12,412 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-02-18 07:27:12,412 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.02 07:27:12" (1/1) ... [2023-02-18 07:27:12,413 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@79d1cac5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 07:27:12, skipping insertion in model container [2023-02-18 07:27:12,413 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.02 07:27:12" (1/1) ... [2023-02-18 07:27:12,417 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-02-18 07:27:12,425 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-02-18 07:27:12,506 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/Ackermann03.c[1168,1181] [2023-02-18 07:27:12,506 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-18 07:27:12,512 INFO L203 MainTranslator]: Completed pre-run [2023-02-18 07:27:12,521 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/Ackermann03.c[1168,1181] [2023-02-18 07:27:12,522 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-18 07:27:12,529 INFO L208 MainTranslator]: Completed translation [2023-02-18 07:27:12,530 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 07:27:12 WrapperNode [2023-02-18 07:27:12,530 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-02-18 07:27:12,531 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-02-18 07:27:12,531 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-02-18 07:27:12,531 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-02-18 07:27:12,535 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 07:27:12" (1/1) ... [2023-02-18 07:27:12,539 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 07:27:12" (1/1) ... [2023-02-18 07:27:12,548 INFO L138 Inliner]: procedures = 13, calls = 11, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 32 [2023-02-18 07:27:12,548 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-02-18 07:27:12,549 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-02-18 07:27:12,549 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-02-18 07:27:12,549 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-02-18 07:27:12,554 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 07:27:12" (1/1) ... [2023-02-18 07:27:12,554 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 07:27:12" (1/1) ... [2023-02-18 07:27:12,555 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 07:27:12" (1/1) ... [2023-02-18 07:27:12,555 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 07:27:12" (1/1) ... [2023-02-18 07:27:12,556 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 07:27:12" (1/1) ... [2023-02-18 07:27:12,557 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 07:27:12" (1/1) ... [2023-02-18 07:27:12,558 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 07:27:12" (1/1) ... [2023-02-18 07:27:12,559 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 07:27:12" (1/1) ... [2023-02-18 07:27:12,559 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-02-18 07:27:12,560 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-02-18 07:27:12,560 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-02-18 07:27:12,560 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-02-18 07:27:12,561 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 07:27:12" (1/1) ... [2023-02-18 07:27:12,564 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-18 07:27:12,572 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 07:27:12,582 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-02-18 07:27:12,598 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-02-18 07:27:12,611 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-02-18 07:27:12,612 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-02-18 07:27:12,612 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-02-18 07:27:12,612 INFO L130 BoogieDeclarations]: Found specification of procedure ackermann [2023-02-18 07:27:12,612 INFO L138 BoogieDeclarations]: Found implementation of procedure ackermann [2023-02-18 07:27:12,612 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-02-18 07:27:12,653 INFO L235 CfgBuilder]: Building ICFG [2023-02-18 07:27:12,655 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2023-02-18 07:27:12,759 INFO L276 CfgBuilder]: Performing block encoding [2023-02-18 07:27:12,764 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-02-18 07:27:12,764 INFO L300 CfgBuilder]: Removed 0 assume(true) statements. [2023-02-18 07:27:12,765 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.02 07:27:12 BoogieIcfgContainer [2023-02-18 07:27:12,766 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-02-18 07:27:12,767 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-02-18 07:27:12,767 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-02-18 07:27:12,769 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-02-18 07:27:12,770 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.02 07:27:12" (1/3) ... [2023-02-18 07:27:12,770 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@748a9e6c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.02 07:27:12, skipping insertion in model container [2023-02-18 07:27:12,770 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 07:27:12" (2/3) ... [2023-02-18 07:27:12,771 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@748a9e6c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.02 07:27:12, skipping insertion in model container [2023-02-18 07:27:12,771 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.02 07:27:12" (3/3) ... [2023-02-18 07:27:12,772 INFO L112 eAbstractionObserver]: Analyzing ICFG Ackermann03.c [2023-02-18 07:27:12,784 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-02-18 07:27:12,784 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 8 error locations. [2023-02-18 07:27:12,816 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-02-18 07:27:12,820 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;@203b651d, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-02-18 07:27:12,821 INFO L358 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2023-02-18 07:27:12,824 INFO L276 IsEmpty]: Start isEmpty. Operand has 38 states, 24 states have (on average 1.5416666666666667) internal successors, (37), 32 states have internal predecessors, (37), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-02-18 07:27:12,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-02-18 07:27:12,828 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 07:27:12,829 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 07:27:12,829 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2023-02-18 07:27:12,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 07:27:12,833 INFO L85 PathProgramCache]: Analyzing trace with hash 180762217, now seen corresponding path program 1 times [2023-02-18 07:27:12,839 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 07:27:12,839 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [787613367] [2023-02-18 07:27:12,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 07:27:12,840 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 07:27:12,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 07:27:12,984 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 07:27:12,985 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 07:27:12,985 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [787613367] [2023-02-18 07:27:12,986 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [787613367] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 07:27:12,986 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 07:27:12,986 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-18 07:27:12,987 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1930156645] [2023-02-18 07:27:12,987 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 07:27:12,991 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-18 07:27:12,991 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 07:27:13,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-18 07:27:13,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-02-18 07:27:13,012 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) [2023-02-18 07:27:13,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 07:27:13,118 INFO L93 Difference]: Finished difference Result 73 states and 85 transitions. [2023-02-18 07:27:13,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-18 07:27:13,139 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 [2023-02-18 07:27:13,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 07:27:13,146 INFO L225 Difference]: With dead ends: 73 [2023-02-18 07:27:13,147 INFO L226 Difference]: Without dead ends: 60 [2023-02-18 07:27:13,149 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-02-18 07:27:13,165 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 61 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 07:27:13,166 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [66 Valid, 107 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 07:27:13,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2023-02-18 07:27:13,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 51. [2023-02-18 07:27:13,210 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) [2023-02-18 07:27:13,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 66 transitions. [2023-02-18 07:27:13,215 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 66 transitions. Word has length 8 [2023-02-18 07:27:13,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 07:27:13,229 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 66 transitions. [2023-02-18 07:27:13,229 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) [2023-02-18 07:27:13,229 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 66 transitions. [2023-02-18 07:27:13,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2023-02-18 07:27:13,230 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 07:27:13,230 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 07:27:13,230 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-02-18 07:27:13,230 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2023-02-18 07:27:13,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 07:27:13,231 INFO L85 PathProgramCache]: Analyzing trace with hash 1308666490, now seen corresponding path program 1 times [2023-02-18 07:27:13,231 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 07:27:13,232 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1497742697] [2023-02-18 07:27:13,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 07:27:13,249 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 07:27:13,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 07:27:13,338 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 07:27:13,339 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 07:27:13,339 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1497742697] [2023-02-18 07:27:13,339 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1497742697] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 07:27:13,339 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 07:27:13,339 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-18 07:27:13,339 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [158787063] [2023-02-18 07:27:13,340 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 07:27:13,342 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-18 07:27:13,342 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 07:27:13,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-18 07:27:13,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-02-18 07:27:13,346 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) [2023-02-18 07:27:13,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 07:27:13,460 INFO L93 Difference]: Finished difference Result 101 states and 139 transitions. [2023-02-18 07:27:13,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-18 07:27:13,461 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2023-02-18 07:27:13,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 07:27:13,462 INFO L225 Difference]: With dead ends: 101 [2023-02-18 07:27:13,464 INFO L226 Difference]: Without dead ends: 95 [2023-02-18 07:27:13,464 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-02-18 07:27:13,466 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 48 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s 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, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 07:27:13,467 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 89 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 07:27:13,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2023-02-18 07:27:13,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 85. [2023-02-18 07:27:13,480 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) [2023-02-18 07:27:13,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 117 transitions. [2023-02-18 07:27:13,486 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 117 transitions. Word has length 9 [2023-02-18 07:27:13,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 07:27:13,489 INFO L495 AbstractCegarLoop]: Abstraction has 85 states and 117 transitions. [2023-02-18 07:27:13,489 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 07:27:13,490 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 117 transitions. [2023-02-18 07:27:13,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2023-02-18 07:27:13,491 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 07:27:13,491 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 07:27:13,491 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-02-18 07:27:13,492 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2023-02-18 07:27:13,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 07:27:13,494 INFO L85 PathProgramCache]: Analyzing trace with hash 1308661493, now seen corresponding path program 1 times [2023-02-18 07:27:13,494 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 07:27:13,494 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1943414310] [2023-02-18 07:27:13,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 07:27:13,495 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 07:27:13,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 07:27:13,549 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 07:27:13,550 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 07:27:13,550 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1943414310] [2023-02-18 07:27:13,550 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1943414310] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 07:27:13,550 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 07:27:13,550 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-18 07:27:13,550 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [643345790] [2023-02-18 07:27:13,550 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 07:27:13,551 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-18 07:27:13,551 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 07:27:13,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-18 07:27:13,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-02-18 07:27:13,551 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) [2023-02-18 07:27:13,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 07:27:13,625 INFO L93 Difference]: Finished difference Result 114 states and 154 transitions. [2023-02-18 07:27:13,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-18 07:27:13,626 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2023-02-18 07:27:13,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 07:27:13,627 INFO L225 Difference]: With dead ends: 114 [2023-02-18 07:27:13,627 INFO L226 Difference]: Without dead ends: 110 [2023-02-18 07:27:13,628 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 [2023-02-18 07:27:13,629 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 [2023-02-18 07:27:13,629 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] [2023-02-18 07:27:13,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2023-02-18 07:27:13,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 102. [2023-02-18 07:27:13,638 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) [2023-02-18 07:27:13,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 138 transitions. [2023-02-18 07:27:13,639 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 138 transitions. Word has length 9 [2023-02-18 07:27:13,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 07:27:13,640 INFO L495 AbstractCegarLoop]: Abstraction has 102 states and 138 transitions. [2023-02-18 07:27:13,640 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 07:27:13,640 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 138 transitions. [2023-02-18 07:27:13,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-02-18 07:27:13,640 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 07:27:13,640 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 07:27:13,640 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-02-18 07:27:13,644 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ackermannErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2023-02-18 07:27:13,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 07:27:13,645 INFO L85 PathProgramCache]: Analyzing trace with hash 1913955596, now seen corresponding path program 1 times [2023-02-18 07:27:13,646 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 07:27:13,646 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [262962338] [2023-02-18 07:27:13,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 07:27:13,646 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 07:27:13,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 07:27:13,710 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 07:27:13,710 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 07:27:13,711 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [262962338] [2023-02-18 07:27:13,711 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [262962338] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 07:27:13,712 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 07:27:13,712 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-18 07:27:13,712 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [933259553] [2023-02-18 07:27:13,712 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 07:27:13,713 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-18 07:27:13,713 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 07:27:13,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-18 07:27:13,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-02-18 07:27:13,714 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) [2023-02-18 07:27:13,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 07:27:13,778 INFO L93 Difference]: Finished difference Result 102 states and 138 transitions. [2023-02-18 07:27:13,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-02-18 07:27:13,779 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2023-02-18 07:27:13,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 07:27:13,780 INFO L225 Difference]: With dead ends: 102 [2023-02-18 07:27:13,780 INFO L226 Difference]: Without dead ends: 100 [2023-02-18 07:27:13,781 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-02-18 07:27:13,782 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 42 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s 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, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 07:27:13,782 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 45 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 07:27:13,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2023-02-18 07:27:13,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 100. [2023-02-18 07:27:13,790 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) [2023-02-18 07:27:13,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 128 transitions. [2023-02-18 07:27:13,791 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 128 transitions. Word has length 10 [2023-02-18 07:27:13,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 07:27:13,792 INFO L495 AbstractCegarLoop]: Abstraction has 100 states and 128 transitions. [2023-02-18 07:27:13,792 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 07:27:13,792 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 128 transitions. [2023-02-18 07:27:13,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-02-18 07:27:13,792 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 07:27:13,793 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 07:27:13,793 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-02-18 07:27:13,793 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ackermannErr6ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2023-02-18 07:27:13,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 07:27:13,793 INFO L85 PathProgramCache]: Analyzing trace with hash -796703108, now seen corresponding path program 1 times [2023-02-18 07:27:13,794 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 07:27:13,794 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1221427766] [2023-02-18 07:27:13,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 07:27:13,794 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 07:27:13,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 07:27:13,835 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 07:27:13,836 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 07:27:13,836 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1221427766] [2023-02-18 07:27:13,836 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1221427766] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 07:27:13,836 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 07:27:13,836 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-18 07:27:13,836 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [77446183] [2023-02-18 07:27:13,837 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 07:27:13,837 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-18 07:27:13,837 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 07:27:13,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-18 07:27:13,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-02-18 07:27:13,838 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) [2023-02-18 07:27:13,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 07:27:13,904 INFO L93 Difference]: Finished difference Result 109 states and 140 transitions. [2023-02-18 07:27:13,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-18 07:27:13,904 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 [2023-02-18 07:27:13,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 07:27:13,905 INFO L225 Difference]: With dead ends: 109 [2023-02-18 07:27:13,905 INFO L226 Difference]: Without dead ends: 108 [2023-02-18 07:27:13,906 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 [2023-02-18 07:27:13,907 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 38 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s 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, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 07:27:13,907 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 92 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 07:27:13,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2023-02-18 07:27:13,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 100. [2023-02-18 07:27:13,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 74 states have (on average 1.3108108108108107) internal successors, (97), 81 states have internal predecessors, (97), 16 states have call successors, (16), 5 states have call predecessors, (16), 4 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2023-02-18 07:27:13,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 126 transitions. [2023-02-18 07:27:13,916 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 126 transitions. Word has length 11 [2023-02-18 07:27:13,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 07:27:13,917 INFO L495 AbstractCegarLoop]: Abstraction has 100 states and 126 transitions. [2023-02-18 07:27:13,917 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) [2023-02-18 07:27:13,917 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 126 transitions. [2023-02-18 07:27:13,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-02-18 07:27:13,918 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 07:27:13,918 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 07:27:13,918 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-02-18 07:27:13,918 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2023-02-18 07:27:13,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 07:27:13,919 INFO L85 PathProgramCache]: Analyzing trace with hash 1669645175, now seen corresponding path program 1 times [2023-02-18 07:27:13,919 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 07:27:13,919 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1105582283] [2023-02-18 07:27:13,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 07:27:13,919 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 07:27:13,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 07:27:13,946 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 07:27:13,946 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 07:27:13,947 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1105582283] [2023-02-18 07:27:13,947 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1105582283] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 07:27:13,947 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 07:27:13,947 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-18 07:27:13,947 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [631363085] [2023-02-18 07:27:13,947 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 07:27:13,948 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-18 07:27:13,948 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 07:27:13,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-18 07:27:13,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-18 07:27:13,949 INFO L87 Difference]: Start difference. First operand 100 states and 126 transitions. Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 states have internal predecessors, (13), 1 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 07:27:13,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 07:27:13,985 INFO L93 Difference]: Finished difference Result 168 states and 221 transitions. [2023-02-18 07:27:13,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-18 07:27:13,986 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 states have internal predecessors, (13), 1 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2023-02-18 07:27:13,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 07:27:13,987 INFO L225 Difference]: With dead ends: 168 [2023-02-18 07:27:13,987 INFO L226 Difference]: Without dead ends: 97 [2023-02-18 07:27:13,988 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-02-18 07:27:13,989 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 26 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-18 07:27:13,989 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 88 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 07:27:13,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2023-02-18 07:27:13,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 96. [2023-02-18 07:27:13,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 71 states have (on average 1.295774647887324) internal successors, (92), 78 states have internal predecessors, (92), 15 states have call successors, (15), 5 states have call predecessors, (15), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2023-02-18 07:27:13,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 119 transitions. [2023-02-18 07:27:13,997 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 119 transitions. Word has length 15 [2023-02-18 07:27:13,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 07:27:13,998 INFO L495 AbstractCegarLoop]: Abstraction has 96 states and 119 transitions. [2023-02-18 07:27:13,998 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 states have internal predecessors, (13), 1 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 07:27:13,998 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 119 transitions. [2023-02-18 07:27:13,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-02-18 07:27:13,998 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 07:27:13,999 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 07:27:13,999 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-02-18 07:27:13,999 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ackermannErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2023-02-18 07:27:13,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 07:27:14,000 INFO L85 PathProgramCache]: Analyzing trace with hash 1669645399, now seen corresponding path program 1 times [2023-02-18 07:27:14,000 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 07:27:14,000 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [800191438] [2023-02-18 07:27:14,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 07:27:14,008 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 07:27:14,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 07:27:14,067 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 07:27:14,067 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 07:27:14,067 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [800191438] [2023-02-18 07:27:14,067 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [800191438] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 07:27:14,067 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [369815826] [2023-02-18 07:27:14,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 07:27:14,068 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 07:27:14,068 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 07:27:14,085 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 07:27:14,091 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-02-18 07:27:14,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 07:27:14,124 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 6 conjunts are in the unsatisfiable core [2023-02-18 07:27:14,127 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 07:27:14,160 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 07:27:14,160 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 07:27:14,208 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 07:27:14,208 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [369815826] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 07:27:14,209 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 07:27:14,209 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 11 [2023-02-18 07:27:14,209 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1116444412] [2023-02-18 07:27:14,209 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 07:27:14,210 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-02-18 07:27:14,210 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 07:27:14,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-02-18 07:27:14,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2023-02-18 07:27:14,213 INFO L87 Difference]: Start difference. First operand 96 states and 119 transitions. Second operand has 12 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 8 states have internal predecessors, (24), 4 states have call successors, (4), 4 states have call predecessors, (4), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 07:27:14,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 07:27:14,402 INFO L93 Difference]: Finished difference Result 274 states and 356 transitions. [2023-02-18 07:27:14,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-02-18 07:27:14,403 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 8 states have internal predecessors, (24), 4 states have call successors, (4), 4 states have call predecessors, (4), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2023-02-18 07:27:14,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 07:27:14,409 INFO L225 Difference]: With dead ends: 274 [2023-02-18 07:27:14,409 INFO L226 Difference]: Without dead ends: 272 [2023-02-18 07:27:14,412 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=104, Invalid=238, Unknown=0, NotChecked=0, Total=342 [2023-02-18 07:27:14,418 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, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 07:27:14,421 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [255 Valid, 163 Invalid, 245 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 148 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 07:27:14,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2023-02-18 07:27:14,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 236. [2023-02-18 07:27:14,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 236 states, 182 states have (on average 1.2637362637362637) internal successors, (230), 189 states have internal predecessors, (230), 36 states have call successors, (36), 13 states have call predecessors, (36), 12 states have return successors, (33), 33 states have call predecessors, (33), 33 states have call successors, (33) [2023-02-18 07:27:14,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 299 transitions. [2023-02-18 07:27:14,457 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 299 transitions. Word has length 15 [2023-02-18 07:27:14,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 07:27:14,457 INFO L495 AbstractCegarLoop]: Abstraction has 236 states and 299 transitions. [2023-02-18 07:27:14,457 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 8 states have internal predecessors, (24), 4 states have call successors, (4), 4 states have call predecessors, (4), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 07:27:14,458 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 299 transitions. [2023-02-18 07:27:14,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-02-18 07:27:14,458 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 07:27:14,458 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 07:27:14,468 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-02-18 07:27:14,668 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 [2023-02-18 07:27:14,669 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2023-02-18 07:27:14,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 07:27:14,669 INFO L85 PathProgramCache]: Analyzing trace with hash 1422985811, now seen corresponding path program 1 times [2023-02-18 07:27:14,669 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 07:27:14,669 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1290160334] [2023-02-18 07:27:14,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 07:27:14,669 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 07:27:14,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 07:27:14,757 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 07:27:14,757 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 07:27:14,758 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1290160334] [2023-02-18 07:27:14,758 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1290160334] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 07:27:14,758 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1969598710] [2023-02-18 07:27:14,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 07:27:14,758 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 07:27:14,758 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 07:27:14,759 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 07:27:14,761 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-02-18 07:27:14,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 07:27:14,800 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 4 conjunts are in the unsatisfiable core [2023-02-18 07:27:14,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 07:27:14,816 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 07:27:14,816 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-18 07:27:14,816 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1969598710] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 07:27:14,816 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-02-18 07:27:14,817 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 9 [2023-02-18 07:27:14,817 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [284038459] [2023-02-18 07:27:14,817 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 07:27:14,817 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-18 07:27:14,817 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 07:27:14,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-18 07:27:14,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2023-02-18 07:27:14,818 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) [2023-02-18 07:27:14,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 07:27:14,894 INFO L93 Difference]: Finished difference Result 328 states and 437 transitions. [2023-02-18 07:27:14,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-18 07:27:14,894 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 [2023-02-18 07:27:14,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 07:27:14,896 INFO L225 Difference]: With dead ends: 328 [2023-02-18 07:27:14,896 INFO L226 Difference]: Without dead ends: 327 [2023-02-18 07:27:14,896 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 [2023-02-18 07:27:14,897 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, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 07:27:14,897 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 96 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 07:27:14,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 327 states. [2023-02-18 07:27:14,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 327 to 293. [2023-02-18 07:27:14,920 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) [2023-02-18 07:27:14,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 373 transitions. [2023-02-18 07:27:14,925 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 373 transitions. Word has length 16 [2023-02-18 07:27:14,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 07:27:14,925 INFO L495 AbstractCegarLoop]: Abstraction has 293 states and 373 transitions. [2023-02-18 07:27:14,925 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) [2023-02-18 07:27:14,925 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 373 transitions. [2023-02-18 07:27:14,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-02-18 07:27:14,926 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 07:27:14,926 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 07:27:14,945 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-02-18 07:27:15,147 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 [2023-02-18 07:27:15,147 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ackermannErr6ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2023-02-18 07:27:15,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 07:27:15,148 INFO L85 PathProgramCache]: Analyzing trace with hash 848163410, now seen corresponding path program 1 times [2023-02-18 07:27:15,148 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 07:27:15,148 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1549564478] [2023-02-18 07:27:15,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 07:27:15,148 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 07:27:15,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 07:27:15,198 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 07:27:15,198 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 07:27:15,198 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1549564478] [2023-02-18 07:27:15,198 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1549564478] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 07:27:15,198 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1104687448] [2023-02-18 07:27:15,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 07:27:15,198 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 07:27:15,199 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 07:27:15,200 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 07:27:15,202 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-02-18 07:27:15,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 07:27:15,228 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 6 conjunts are in the unsatisfiable core [2023-02-18 07:27:15,229 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 07:27:15,245 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 07:27:15,245 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 07:27:15,272 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 07:27:15,272 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1104687448] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 07:27:15,272 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 07:27:15,272 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 11 [2023-02-18 07:27:15,272 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [899014910] [2023-02-18 07:27:15,272 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 07:27:15,273 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-02-18 07:27:15,273 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 07:27:15,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-02-18 07:27:15,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2023-02-18 07:27:15,274 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) [2023-02-18 07:27:15,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 07:27:15,427 INFO L93 Difference]: Finished difference Result 591 states and 792 transitions. [2023-02-18 07:27:15,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-02-18 07:27:15,427 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 [2023-02-18 07:27:15,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 07:27:15,429 INFO L225 Difference]: With dead ends: 591 [2023-02-18 07:27:15,430 INFO L226 Difference]: Without dead ends: 590 [2023-02-18 07:27:15,430 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 [2023-02-18 07:27:15,430 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 [2023-02-18 07:27:15,431 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] [2023-02-18 07:27:15,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 590 states. [2023-02-18 07:27:15,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 590 to 521. [2023-02-18 07:27:15,450 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) [2023-02-18 07:27:15,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 521 states to 521 states and 649 transitions. [2023-02-18 07:27:15,452 INFO L78 Accepts]: Start accepts. Automaton has 521 states and 649 transitions. Word has length 19 [2023-02-18 07:27:15,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 07:27:15,452 INFO L495 AbstractCegarLoop]: Abstraction has 521 states and 649 transitions. [2023-02-18 07:27:15,453 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) [2023-02-18 07:27:15,453 INFO L276 IsEmpty]: Start isEmpty. Operand 521 states and 649 transitions. [2023-02-18 07:27:15,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-02-18 07:27:15,453 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 07:27:15,453 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 07:27:15,467 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-02-18 07:27:15,658 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 [2023-02-18 07:27:15,659 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2023-02-18 07:27:15,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 07:27:15,659 INFO L85 PathProgramCache]: Analyzing trace with hash 1106403678, now seen corresponding path program 1 times [2023-02-18 07:27:15,659 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 07:27:15,659 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [159210081] [2023-02-18 07:27:15,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 07:27:15,660 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 07:27:15,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 07:27:15,683 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-02-18 07:27:15,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 07:27:15,696 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-18 07:27:15,696 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 07:27:15,696 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [159210081] [2023-02-18 07:27:15,696 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [159210081] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 07:27:15,696 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1668898974] [2023-02-18 07:27:15,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 07:27:15,697 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 07:27:15,697 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 07:27:15,713 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 07:27:15,714 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-02-18 07:27:15,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 07:27:15,749 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 4 conjunts are in the unsatisfiable core [2023-02-18 07:27:15,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 07:27:15,765 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-18 07:27:15,765 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-18 07:27:15,765 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1668898974] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 07:27:15,765 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-02-18 07:27:15,765 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 10 [2023-02-18 07:27:15,766 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1986930297] [2023-02-18 07:27:15,766 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 07:27:15,766 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-18 07:27:15,766 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 07:27:15,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-18 07:27:15,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2023-02-18 07:27:15,767 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) [2023-02-18 07:27:15,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 07:27:15,823 INFO L93 Difference]: Finished difference Result 562 states and 696 transitions. [2023-02-18 07:27:15,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-02-18 07:27:15,824 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 [2023-02-18 07:27:15,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 07:27:15,826 INFO L225 Difference]: With dead ends: 562 [2023-02-18 07:27:15,826 INFO L226 Difference]: Without dead ends: 561 [2023-02-18 07:27:15,826 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 [2023-02-18 07:27:15,827 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 [2023-02-18 07:27:15,827 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] [2023-02-18 07:27:15,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 561 states. [2023-02-18 07:27:15,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 561 to 520. [2023-02-18 07:27:15,842 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) [2023-02-18 07:27:15,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 520 states to 520 states and 645 transitions. [2023-02-18 07:27:15,845 INFO L78 Accepts]: Start accepts. Automaton has 520 states and 645 transitions. Word has length 24 [2023-02-18 07:27:15,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 07:27:15,845 INFO L495 AbstractCegarLoop]: Abstraction has 520 states and 645 transitions. [2023-02-18 07:27:15,845 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) [2023-02-18 07:27:15,845 INFO L276 IsEmpty]: Start isEmpty. Operand 520 states and 645 transitions. [2023-02-18 07:27:15,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-02-18 07:27:15,846 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 07:27:15,846 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 07:27:15,865 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-02-18 07:27:16,051 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 [2023-02-18 07:27:16,051 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2023-02-18 07:27:16,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 07:27:16,052 INFO L85 PathProgramCache]: Analyzing trace with hash -61224288, now seen corresponding path program 1 times [2023-02-18 07:27:16,052 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 07:27:16,052 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1874387450] [2023-02-18 07:27:16,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 07:27:16,052 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 07:27:16,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 07:27:16,072 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-02-18 07:27:16,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 07:27:16,082 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-18 07:27:16,082 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 07:27:16,082 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1874387450] [2023-02-18 07:27:16,082 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1874387450] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 07:27:16,083 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [440599410] [2023-02-18 07:27:16,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 07:27:16,083 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 07:27:16,083 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 07:27:16,084 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 07:27:16,086 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-02-18 07:27:16,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 07:27:16,112 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 10 conjunts are in the unsatisfiable core [2023-02-18 07:27:16,112 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 07:27:16,148 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-18 07:27:16,148 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 07:27:16,222 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-18 07:27:16,223 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [440599410] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 07:27:16,223 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 07:27:16,223 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 19 [2023-02-18 07:27:16,223 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [385490778] [2023-02-18 07:27:16,223 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 07:27:16,224 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-02-18 07:27:16,224 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 07:27:16,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-02-18 07:27:16,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=299, Unknown=0, NotChecked=0, Total=342 [2023-02-18 07:27:16,224 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) [2023-02-18 07:27:16,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 07:27:16,582 INFO L93 Difference]: Finished difference Result 1284 states and 1790 transitions. [2023-02-18 07:27:16,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-02-18 07:27:16,582 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 17 states have (on average 3.235294117647059) internal successors, (55), 16 states have internal predecessors, (55), 8 states have call successors, (9), 4 states have call predecessors, (9), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 25 [2023-02-18 07:27:16,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 07:27:16,587 INFO L225 Difference]: With dead ends: 1284 [2023-02-18 07:27:16,587 INFO L226 Difference]: Without dead ends: 894 [2023-02-18 07:27:16,589 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 42 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=218, Invalid=904, Unknown=0, NotChecked=0, Total=1122 [2023-02-18 07:27:16,589 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 250 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 466 mSolverCounterSat, 94 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s 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 [2023-02-18 07:27:16,590 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] [2023-02-18 07:27:16,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 894 states. [2023-02-18 07:27:16,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 894 to 694. [2023-02-18 07:27:16,617 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) [2023-02-18 07:27:16,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 694 states to 694 states and 852 transitions. [2023-02-18 07:27:16,620 INFO L78 Accepts]: Start accepts. Automaton has 694 states and 852 transitions. Word has length 25 [2023-02-18 07:27:16,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 07:27:16,621 INFO L495 AbstractCegarLoop]: Abstraction has 694 states and 852 transitions. [2023-02-18 07:27:16,621 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 17 states have (on average 3.235294117647059) internal successors, (55), 16 states have internal predecessors, (55), 8 states have call successors, (9), 4 states have call predecessors, (9), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-18 07:27:16,621 INFO L276 IsEmpty]: Start isEmpty. Operand 694 states and 852 transitions. [2023-02-18 07:27:16,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-02-18 07:27:16,625 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 07:27:16,626 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 07:27:16,632 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-02-18 07:27:16,830 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 [2023-02-18 07:27:16,830 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ackermannErr6ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2023-02-18 07:27:16,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 07:27:16,831 INFO L85 PathProgramCache]: Analyzing trace with hash 1298021223, now seen corresponding path program 1 times [2023-02-18 07:27:16,831 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 07:27:16,831 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2119710396] [2023-02-18 07:27:16,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 07:27:16,831 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 07:27:16,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 07:27:16,899 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-02-18 07:27:16,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 07:27:16,918 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-02-18 07:27:16,918 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 07:27:16,919 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2119710396] [2023-02-18 07:27:16,919 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2119710396] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 07:27:16,919 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1592322620] [2023-02-18 07:27:16,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 07:27:16,919 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 07:27:16,919 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 07:27:16,920 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 07:27:16,928 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-02-18 07:27:16,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 07:27:16,954 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 8 conjunts are in the unsatisfiable core [2023-02-18 07:27:16,955 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 07:27:16,990 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-18 07:27:16,990 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 07:27:17,030 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-18 07:27:17,030 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1592322620] provided 1 perfect and 1 imperfect interpolant sequences [2023-02-18 07:27:17,030 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-02-18 07:27:17,030 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 6] total 13 [2023-02-18 07:27:17,031 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1279946719] [2023-02-18 07:27:17,031 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 07:27:17,031 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-02-18 07:27:17,031 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 07:27:17,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-02-18 07:27:17,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2023-02-18 07:27:17,032 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) [2023-02-18 07:27:17,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 07:27:17,123 INFO L93 Difference]: Finished difference Result 769 states and 977 transitions. [2023-02-18 07:27:17,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-02-18 07:27:17,123 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 [2023-02-18 07:27:17,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 07:27:17,125 INFO L225 Difference]: With dead ends: 769 [2023-02-18 07:27:17,126 INFO L226 Difference]: Without dead ends: 768 [2023-02-18 07:27:17,126 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 [2023-02-18 07:27:17,126 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, 0.0s IncrementalHoareTripleChecker+Time [2023-02-18 07:27:17,127 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 107 Invalid, 132 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 121 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 07:27:17,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 768 states. [2023-02-18 07:27:17,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 768 to 712. [2023-02-18 07:27:17,146 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) [2023-02-18 07:27:17,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 712 states to 712 states and 873 transitions. [2023-02-18 07:27:17,148 INFO L78 Accepts]: Start accepts. Automaton has 712 states and 873 transitions. Word has length 27 [2023-02-18 07:27:17,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 07:27:17,149 INFO L495 AbstractCegarLoop]: Abstraction has 712 states and 873 transitions. [2023-02-18 07:27:17,149 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) [2023-02-18 07:27:17,149 INFO L276 IsEmpty]: Start isEmpty. Operand 712 states and 873 transitions. [2023-02-18 07:27:17,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2023-02-18 07:27:17,152 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 07:27:17,152 INFO L195 NwaCegarLoop]: trace histogram [4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 07:27:17,170 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-02-18 07:27:17,356 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 [2023-02-18 07:27:17,357 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2023-02-18 07:27:17,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 07:27:17,357 INFO L85 PathProgramCache]: Analyzing trace with hash -722353775, now seen corresponding path program 1 times [2023-02-18 07:27:17,357 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 07:27:17,357 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [352828777] [2023-02-18 07:27:17,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 07:27:17,358 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 07:27:17,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 07:27:17,410 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-02-18 07:27:17,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 07:27:17,433 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-02-18 07:27:17,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 07:27:17,461 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-02-18 07:27:17,461 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 07:27:17,461 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [352828777] [2023-02-18 07:27:17,461 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [352828777] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 07:27:17,461 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1432312942] [2023-02-18 07:27:17,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 07:27:17,461 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 07:27:17,462 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 07:27:17,477 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 07:27:17,479 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-02-18 07:27:17,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 07:27:17,506 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 9 conjunts are in the unsatisfiable core [2023-02-18 07:27:17,507 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 07:27:17,523 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-02-18 07:27:17,523 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 07:27:17,583 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-02-18 07:27:17,583 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1432312942] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 07:27:17,583 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 07:27:17,583 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2023-02-18 07:27:17,583 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1880190580] [2023-02-18 07:27:17,583 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 07:27:17,584 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-02-18 07:27:17,584 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 07:27:17,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-02-18 07:27:17,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2023-02-18 07:27:17,585 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) [2023-02-18 07:27:17,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 07:27:17,871 INFO L93 Difference]: Finished difference Result 1137 states and 1677 transitions. [2023-02-18 07:27:17,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-02-18 07:27:17,872 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 14 states have internal predecessors, (43), 3 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (5), 4 states have call predecessors, (5), 1 states have call successors, (5) Word has length 34 [2023-02-18 07:27:17,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 07:27:17,876 INFO L225 Difference]: With dead ends: 1137 [2023-02-18 07:27:17,876 INFO L226 Difference]: Without dead ends: 1135 [2023-02-18 07:27:17,877 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 62 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=188, Invalid=682, Unknown=0, NotChecked=0, Total=870 [2023-02-18 07:27:17,877 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 [2023-02-18 07:27:17,878 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] [2023-02-18 07:27:17,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1135 states. [2023-02-18 07:27:17,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1135 to 966. [2023-02-18 07:27:17,913 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) [2023-02-18 07:27:17,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 966 states to 966 states and 1300 transitions. [2023-02-18 07:27:17,917 INFO L78 Accepts]: Start accepts. Automaton has 966 states and 1300 transitions. Word has length 34 [2023-02-18 07:27:17,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 07:27:17,917 INFO L495 AbstractCegarLoop]: Abstraction has 966 states and 1300 transitions. [2023-02-18 07:27:17,917 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 14 states have internal predecessors, (43), 3 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (5), 4 states have call predecessors, (5), 1 states have call successors, (5) [2023-02-18 07:27:17,918 INFO L276 IsEmpty]: Start isEmpty. Operand 966 states and 1300 transitions. [2023-02-18 07:27:17,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2023-02-18 07:27:17,918 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 07:27:17,918 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] [2023-02-18 07:27:17,935 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-02-18 07:27:18,123 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 [2023-02-18 07:27:18,123 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ackermannErr6ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2023-02-18 07:27:18,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 07:27:18,124 INFO L85 PathProgramCache]: Analyzing trace with hash -1979265987, now seen corresponding path program 2 times [2023-02-18 07:27:18,124 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 07:27:18,124 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [680657231] [2023-02-18 07:27:18,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 07:27:18,124 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 07:27:18,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 07:27:18,169 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-02-18 07:27:18,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 07:27:18,185 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-02-18 07:27:18,185 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 07:27:18,185 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [680657231] [2023-02-18 07:27:18,185 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [680657231] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 07:27:18,185 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [531944783] [2023-02-18 07:27:18,185 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-18 07:27:18,186 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 07:27:18,186 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 07:27:18,201 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 07:27:18,205 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-02-18 07:27:18,241 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-18 07:27:18,242 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 07:27:18,242 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 12 conjunts are in the unsatisfiable core [2023-02-18 07:27:18,243 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 07:27:18,258 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-02-18 07:27:18,258 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 07:27:18,320 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 4 proven. 14 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-02-18 07:27:18,320 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [531944783] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 07:27:18,320 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 07:27:18,320 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2023-02-18 07:27:18,321 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1951502684] [2023-02-18 07:27:18,321 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 07:27:18,321 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-02-18 07:27:18,321 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 07:27:18,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-02-18 07:27:18,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2023-02-18 07:27:18,322 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) [2023-02-18 07:27:18,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 07:27:18,582 INFO L93 Difference]: Finished difference Result 1163 states and 1554 transitions. [2023-02-18 07:27:18,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-02-18 07:27:18,582 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 [2023-02-18 07:27:18,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 07:27:18,586 INFO L225 Difference]: With dead ends: 1163 [2023-02-18 07:27:18,586 INFO L226 Difference]: Without dead ends: 1162 [2023-02-18 07:27:18,586 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 61 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=238, Invalid=754, Unknown=0, NotChecked=0, Total=992 [2023-02-18 07:27:18,587 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 [2023-02-18 07:27:18,587 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] [2023-02-18 07:27:18,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1162 states. [2023-02-18 07:27:18,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1162 to 1019. [2023-02-18 07:27:18,623 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) [2023-02-18 07:27:18,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1019 states to 1019 states and 1361 transitions. [2023-02-18 07:27:18,627 INFO L78 Accepts]: Start accepts. Automaton has 1019 states and 1361 transitions. Word has length 35 [2023-02-18 07:27:18,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 07:27:18,627 INFO L495 AbstractCegarLoop]: Abstraction has 1019 states and 1361 transitions. [2023-02-18 07:27:18,627 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) [2023-02-18 07:27:18,628 INFO L276 IsEmpty]: Start isEmpty. Operand 1019 states and 1361 transitions. [2023-02-18 07:27:18,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2023-02-18 07:27:18,628 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 07:27:18,628 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 07:27:18,635 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-02-18 07:27:18,833 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 [2023-02-18 07:27:18,833 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ackermannErr6ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2023-02-18 07:27:18,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 07:27:18,834 INFO L85 PathProgramCache]: Analyzing trace with hash 1607744024, now seen corresponding path program 1 times [2023-02-18 07:27:18,834 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 07:27:18,834 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1883602091] [2023-02-18 07:27:18,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 07:27:18,834 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 07:27:18,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 07:27:18,860 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-02-18 07:27:18,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 07:27:18,873 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-02-18 07:27:18,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 07:27:18,886 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 14 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-02-18 07:27:18,886 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 07:27:18,887 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1883602091] [2023-02-18 07:27:18,887 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1883602091] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 07:27:18,887 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1229945092] [2023-02-18 07:27:18,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 07:27:18,887 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 07:27:18,887 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 07:27:18,888 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 07:27:18,916 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-02-18 07:27:18,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 07:27:18,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 9 conjunts are in the unsatisfiable core [2023-02-18 07:27:18,922 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 07:27:18,951 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 12 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-02-18 07:27:18,951 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 07:27:19,008 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-02-18 07:27:19,008 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1229945092] provided 1 perfect and 1 imperfect interpolant sequences [2023-02-18 07:27:19,009 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-02-18 07:27:19,009 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8, 8] total 17 [2023-02-18 07:27:19,009 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1463717473] [2023-02-18 07:27:19,009 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 07:27:19,009 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-02-18 07:27:19,009 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 07:27:19,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-02-18 07:27:19,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2023-02-18 07:27:19,010 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) [2023-02-18 07:27:19,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 07:27:19,170 INFO L93 Difference]: Finished difference Result 1129 states and 1564 transitions. [2023-02-18 07:27:19,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-02-18 07:27:19,170 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 3.5) internal successors, (28), 7 states have internal predecessors, (28), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 36 [2023-02-18 07:27:19,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 07:27:19,174 INFO L225 Difference]: With dead ends: 1129 [2023-02-18 07:27:19,174 INFO L226 Difference]: Without dead ends: 1128 [2023-02-18 07:27:19,175 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 60 SyntacticMatches, 6 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=100, Invalid=550, Unknown=0, NotChecked=0, Total=650 [2023-02-18 07:27:19,175 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 [2023-02-18 07:27:19,175 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] [2023-02-18 07:27:19,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1128 states. [2023-02-18 07:27:19,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1128 to 1027. [2023-02-18 07:27:19,233 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) [2023-02-18 07:27:19,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1027 states to 1027 states and 1310 transitions. [2023-02-18 07:27:19,238 INFO L78 Accepts]: Start accepts. Automaton has 1027 states and 1310 transitions. Word has length 36 [2023-02-18 07:27:19,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 07:27:19,238 INFO L495 AbstractCegarLoop]: Abstraction has 1027 states and 1310 transitions. [2023-02-18 07:27:19,238 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 3.5) internal successors, (28), 7 states have internal predecessors, (28), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-18 07:27:19,238 INFO L276 IsEmpty]: Start isEmpty. Operand 1027 states and 1310 transitions. [2023-02-18 07:27:19,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-02-18 07:27:19,239 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 07:27:19,239 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1] [2023-02-18 07:27:19,246 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-02-18 07:27:19,444 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 [2023-02-18 07:27:19,444 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ackermannErr6ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2023-02-18 07:27:19,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 07:27:19,445 INFO L85 PathProgramCache]: Analyzing trace with hash -1390366252, now seen corresponding path program 2 times [2023-02-18 07:27:19,445 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 07:27:19,445 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1212851747] [2023-02-18 07:27:19,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 07:27:19,445 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 07:27:19,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 07:27:19,522 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 07:27:19,523 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 07:27:19,523 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1212851747] [2023-02-18 07:27:19,523 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1212851747] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 07:27:19,523 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1560383731] [2023-02-18 07:27:19,523 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-18 07:27:19,523 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 07:27:19,524 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 07:27:19,524 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 07:27:19,548 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-02-18 07:27:19,577 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-18 07:27:19,578 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 07:27:19,578 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 12 conjunts are in the unsatisfiable core [2023-02-18 07:27:19,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 07:27:19,623 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 07:27:19,623 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 07:27:19,725 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 07:27:19,725 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1560383731] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 07:27:19,725 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 07:27:19,725 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 23 [2023-02-18 07:27:19,726 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [255215254] [2023-02-18 07:27:19,726 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 07:27:19,726 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-02-18 07:27:19,726 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 07:27:19,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-02-18 07:27:19,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=416, Unknown=0, NotChecked=0, Total=552 [2023-02-18 07:27:19,728 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) [2023-02-18 07:27:20,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 07:27:20,192 INFO L93 Difference]: Finished difference Result 2044 states and 2749 transitions. [2023-02-18 07:27:20,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2023-02-18 07:27:20,193 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 [2023-02-18 07:27:20,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 07:27:20,199 INFO L225 Difference]: With dead ends: 2044 [2023-02-18 07:27:20,200 INFO L226 Difference]: Without dead ends: 2043 [2023-02-18 07:27:20,201 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 67 SyntacticMatches, 8 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 376 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=554, Invalid=1252, Unknown=0, NotChecked=0, Total=1806 [2023-02-18 07:27:20,201 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 [2023-02-18 07:27:20,201 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] [2023-02-18 07:27:20,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2043 states. [2023-02-18 07:27:20,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2043 to 1748. [2023-02-18 07:27:20,276 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) [2023-02-18 07:27:20,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1748 states to 1748 states and 2190 transitions. [2023-02-18 07:27:20,289 INFO L78 Accepts]: Start accepts. Automaton has 1748 states and 2190 transitions. Word has length 43 [2023-02-18 07:27:20,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 07:27:20,290 INFO L495 AbstractCegarLoop]: Abstraction has 1748 states and 2190 transitions. [2023-02-18 07:27:20,290 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) [2023-02-18 07:27:20,290 INFO L276 IsEmpty]: Start isEmpty. Operand 1748 states and 2190 transitions. [2023-02-18 07:27:20,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2023-02-18 07:27:20,291 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 07:27:20,292 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 07:27:20,311 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-02-18 07:27:20,496 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 [2023-02-18 07:27:20,496 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ackermannErr6ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2023-02-18 07:27:20,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 07:27:20,497 INFO L85 PathProgramCache]: Analyzing trace with hash -1058043410, now seen corresponding path program 2 times [2023-02-18 07:27:20,497 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 07:27:20,497 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [479577739] [2023-02-18 07:27:20,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 07:27:20,497 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 07:27:20,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 07:27:20,579 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-02-18 07:27:20,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 07:27:20,592 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-02-18 07:27:20,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 07:27:20,606 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 26 proven. 8 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-02-18 07:27:20,606 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 07:27:20,607 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [479577739] [2023-02-18 07:27:20,607 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [479577739] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 07:27:20,607 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1519702806] [2023-02-18 07:27:20,607 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-18 07:27:20,607 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 07:27:20,607 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 07:27:20,630 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 07:27:20,631 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-02-18 07:27:20,660 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-18 07:27:20,661 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 07:27:20,661 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 11 conjunts are in the unsatisfiable core [2023-02-18 07:27:20,662 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 07:27:20,700 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 24 proven. 10 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-02-18 07:27:20,700 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 07:27:20,776 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 28 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-02-18 07:27:20,777 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1519702806] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 07:27:20,777 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 07:27:20,777 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 21 [2023-02-18 07:27:20,777 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1137976047] [2023-02-18 07:27:20,777 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 07:27:20,777 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-02-18 07:27:20,777 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 07:27:20,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-02-18 07:27:20,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2023-02-18 07:27:20,778 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) [2023-02-18 07:27:21,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 07:27:21,432 INFO L93 Difference]: Finished difference Result 3771 states and 5462 transitions. [2023-02-18 07:27:21,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-02-18 07:27:21,433 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 2.9047619047619047) internal successors, (61), 16 states have internal predecessors, (61), 5 states have call successors, (7), 5 states have call predecessors, (7), 5 states have return successors, (5), 4 states have call predecessors, (5), 1 states have call successors, (5) Word has length 44 [2023-02-18 07:27:21,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 07:27:21,441 INFO L225 Difference]: With dead ends: 3771 [2023-02-18 07:27:21,441 INFO L226 Difference]: Without dead ends: 2618 [2023-02-18 07:27:21,447 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 [2023-02-18 07:27:21,448 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 [2023-02-18 07:27:21,448 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] [2023-02-18 07:27:21,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2618 states. [2023-02-18 07:27:21,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2618 to 1927. [2023-02-18 07:27:21,524 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) [2023-02-18 07:27:21,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1927 states to 1927 states and 2396 transitions. [2023-02-18 07:27:21,530 INFO L78 Accepts]: Start accepts. Automaton has 1927 states and 2396 transitions. Word has length 44 [2023-02-18 07:27:21,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 07:27:21,530 INFO L495 AbstractCegarLoop]: Abstraction has 1927 states and 2396 transitions. [2023-02-18 07:27:21,530 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 2.9047619047619047) internal successors, (61), 16 states have internal predecessors, (61), 5 states have call successors, (7), 5 states have call predecessors, (7), 5 states have return successors, (5), 4 states have call predecessors, (5), 1 states have call successors, (5) [2023-02-18 07:27:21,531 INFO L276 IsEmpty]: Start isEmpty. Operand 1927 states and 2396 transitions. [2023-02-18 07:27:21,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2023-02-18 07:27:21,532 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 07:27:21,532 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 07:27:21,539 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-02-18 07:27:21,737 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 [2023-02-18 07:27:21,737 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ackermannErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2023-02-18 07:27:21,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 07:27:21,738 INFO L85 PathProgramCache]: Analyzing trace with hash 407823314, now seen corresponding path program 1 times [2023-02-18 07:27:21,738 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 07:27:21,738 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [706098568] [2023-02-18 07:27:21,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 07:27:21,738 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 07:27:21,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 07:27:21,775 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2023-02-18 07:27:21,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 07:27:21,785 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 38 proven. 5 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-02-18 07:27:21,785 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 07:27:21,785 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [706098568] [2023-02-18 07:27:21,785 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [706098568] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 07:27:21,785 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1397296964] [2023-02-18 07:27:21,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 07:27:21,785 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 07:27:21,786 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 07:27:21,787 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 07:27:21,788 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-02-18 07:27:21,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 07:27:21,822 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 9 conjunts are in the unsatisfiable core [2023-02-18 07:27:21,824 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 07:27:21,857 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 52 proven. 3 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-02-18 07:27:21,857 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 07:27:21,913 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 53 proven. 2 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-02-18 07:27:21,913 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1397296964] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 07:27:21,914 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 07:27:21,914 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 16 [2023-02-18 07:27:21,914 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1931441099] [2023-02-18 07:27:21,914 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 07:27:21,914 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-02-18 07:27:21,914 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 07:27:21,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-02-18 07:27:21,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2023-02-18 07:27:21,915 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) [2023-02-18 07:27:22,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 07:27:22,276 INFO L93 Difference]: Finished difference Result 2463 states and 3242 transitions. [2023-02-18 07:27:22,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-02-18 07:27:22,276 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.375) internal successors, (54), 13 states have internal predecessors, (54), 6 states have call successors, (9), 5 states have call predecessors, (9), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 51 [2023-02-18 07:27:22,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 07:27:22,284 INFO L225 Difference]: With dead ends: 2463 [2023-02-18 07:27:22,284 INFO L226 Difference]: Without dead ends: 2363 [2023-02-18 07:27:22,285 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 89 SyntacticMatches, 7 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 247 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=334, Invalid=926, Unknown=0, NotChecked=0, Total=1260 [2023-02-18 07:27:22,285 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 160 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 465 mSolverCounterSat, 124 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s 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 [2023-02-18 07:27:22,285 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] [2023-02-18 07:27:22,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2363 states. [2023-02-18 07:27:22,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2363 to 1867. [2023-02-18 07:27:22,361 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) [2023-02-18 07:27:22,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1867 states to 1867 states and 2321 transitions. [2023-02-18 07:27:22,366 INFO L78 Accepts]: Start accepts. Automaton has 1867 states and 2321 transitions. Word has length 51 [2023-02-18 07:27:22,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 07:27:22,366 INFO L495 AbstractCegarLoop]: Abstraction has 1867 states and 2321 transitions. [2023-02-18 07:27:22,367 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.375) internal successors, (54), 13 states have internal predecessors, (54), 6 states have call successors, (9), 5 states have call predecessors, (9), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-02-18 07:27:22,367 INFO L276 IsEmpty]: Start isEmpty. Operand 1867 states and 2321 transitions. [2023-02-18 07:27:22,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2023-02-18 07:27:22,368 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 07:27:22,368 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] [2023-02-18 07:27:22,375 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2023-02-18 07:27:22,573 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 [2023-02-18 07:27:22,573 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ackermannErr6ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2023-02-18 07:27:22,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 07:27:22,574 INFO L85 PathProgramCache]: Analyzing trace with hash 357169897, now seen corresponding path program 3 times [2023-02-18 07:27:22,574 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 07:27:22,574 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [871825522] [2023-02-18 07:27:22,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 07:27:22,574 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 07:27:22,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 07:27:22,663 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2023-02-18 07:27:22,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 07:27:22,681 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 3 proven. 71 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-02-18 07:27:22,681 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 07:27:22,681 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [871825522] [2023-02-18 07:27:22,682 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [871825522] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 07:27:22,682 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [873617711] [2023-02-18 07:27:22,682 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-18 07:27:22,682 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 07:27:22,682 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 07:27:22,702 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 07:27:22,739 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-02-18 07:27:22,750 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2023-02-18 07:27:22,750 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 07:27:22,750 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 16 conjunts are in the unsatisfiable core [2023-02-18 07:27:22,752 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 07:27:22,814 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 3 proven. 71 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-02-18 07:27:22,814 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 07:27:22,937 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 5 proven. 69 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-02-18 07:27:22,938 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [873617711] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 07:27:22,938 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 07:27:22,938 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 26 [2023-02-18 07:27:22,938 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1864567010] [2023-02-18 07:27:22,938 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 07:27:22,938 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-02-18 07:27:22,938 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 07:27:22,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-02-18 07:27:22,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=582, Unknown=0, NotChecked=0, Total=702 [2023-02-18 07:27:22,939 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) [2023-02-18 07:27:23,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 07:27:23,343 INFO L93 Difference]: Finished difference Result 2157 states and 2766 transitions. [2023-02-18 07:27:23,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2023-02-18 07:27:23,344 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 [2023-02-18 07:27:23,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 07:27:23,350 INFO L225 Difference]: With dead ends: 2157 [2023-02-18 07:27:23,351 INFO L226 Difference]: Without dead ends: 2156 [2023-02-18 07:27:23,352 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 [2023-02-18 07:27:23,352 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 [2023-02-18 07:27:23,353 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] [2023-02-18 07:27:23,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2156 states. [2023-02-18 07:27:23,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2156 to 1895. [2023-02-18 07:27:23,467 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) [2023-02-18 07:27:23,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1895 states to 1895 states and 2352 transitions. [2023-02-18 07:27:23,474 INFO L78 Accepts]: Start accepts. Automaton has 1895 states and 2352 transitions. Word has length 51 [2023-02-18 07:27:23,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 07:27:23,474 INFO L495 AbstractCegarLoop]: Abstraction has 1895 states and 2352 transitions. [2023-02-18 07:27:23,475 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) [2023-02-18 07:27:23,475 INFO L276 IsEmpty]: Start isEmpty. Operand 1895 states and 2352 transitions. [2023-02-18 07:27:23,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2023-02-18 07:27:23,477 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 07:27:23,477 INFO L195 NwaCegarLoop]: trace histogram [6, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 07:27:23,491 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-02-18 07:27:23,682 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 [2023-02-18 07:27:23,682 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2023-02-18 07:27:23,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 07:27:23,683 INFO L85 PathProgramCache]: Analyzing trace with hash 843839239, now seen corresponding path program 1 times [2023-02-18 07:27:23,683 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 07:27:23,683 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1117587624] [2023-02-18 07:27:23,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 07:27:23,683 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 07:27:23,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 07:27:23,744 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-02-18 07:27:23,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 07:27:23,792 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-02-18 07:27:23,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 07:27:23,813 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-02-18 07:27:23,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 07:27:23,833 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2023-02-18 07:27:23,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 07:27:23,855 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 21 proven. 16 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-02-18 07:27:23,855 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 07:27:23,855 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1117587624] [2023-02-18 07:27:23,855 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1117587624] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 07:27:23,856 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1997734061] [2023-02-18 07:27:23,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 07:27:23,856 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 07:27:23,856 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 07:27:23,869 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 07:27:23,870 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-02-18 07:27:23,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 07:27:23,904 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 15 conjunts are in the unsatisfiable core [2023-02-18 07:27:23,905 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 07:27:23,940 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 14 proven. 18 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2023-02-18 07:27:23,940 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 07:27:24,083 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 18 proven. 19 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-02-18 07:27:24,083 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1997734061] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 07:27:24,083 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 07:27:24,083 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 13] total 26 [2023-02-18 07:27:24,083 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1658200080] [2023-02-18 07:27:24,084 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 07:27:24,084 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-02-18 07:27:24,084 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 07:27:24,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-02-18 07:27:24,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=614, Unknown=0, NotChecked=0, Total=702 [2023-02-18 07:27:24,085 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) [2023-02-18 07:27:25,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 07:27:25,128 INFO L93 Difference]: Finished difference Result 4390 states and 7701 transitions. [2023-02-18 07:27:25,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2023-02-18 07:27:25,128 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 2.230769230769231) internal successors, (58), 21 states have internal predecessors, (58), 5 states have call successors, (7), 3 states have call predecessors, (7), 8 states have return successors, (9), 8 states have call predecessors, (9), 3 states have call successors, (9) Word has length 53 [2023-02-18 07:27:25,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 07:27:25,162 INFO L225 Difference]: With dead ends: 4390 [2023-02-18 07:27:25,176 INFO L226 Difference]: Without dead ends: 4388 [2023-02-18 07:27:25,181 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 [2023-02-18 07:27:25,181 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 318 mSDsluCounter, 228 mSDsCounter, 0 mSdLazyCounter, 855 mSolverCounterSat, 702 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 331 SdHoareTripleChecker+Valid, 253 SdHoareTripleChecker+Invalid, 1557 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 702 IncrementalHoareTripleChecker+Valid, 855 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-02-18 07:27:25,182 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [331 Valid, 253 Invalid, 1557 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [702 Valid, 855 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-02-18 07:27:25,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4388 states. [2023-02-18 07:27:25,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4388 to 3212. [2023-02-18 07:27:25,405 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) [2023-02-18 07:27:25,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3212 states to 3212 states and 6170 transitions. [2023-02-18 07:27:25,420 INFO L78 Accepts]: Start accepts. Automaton has 3212 states and 6170 transitions. Word has length 53 [2023-02-18 07:27:25,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 07:27:25,421 INFO L495 AbstractCegarLoop]: Abstraction has 3212 states and 6170 transitions. [2023-02-18 07:27:25,421 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 2.230769230769231) internal successors, (58), 21 states have internal predecessors, (58), 5 states have call successors, (7), 3 states have call predecessors, (7), 8 states have return successors, (9), 8 states have call predecessors, (9), 3 states have call successors, (9) [2023-02-18 07:27:25,421 INFO L276 IsEmpty]: Start isEmpty. Operand 3212 states and 6170 transitions. [2023-02-18 07:27:25,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2023-02-18 07:27:25,422 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 07:27:25,422 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1] [2023-02-18 07:27:25,429 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-02-18 07:27:25,627 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 [2023-02-18 07:27:25,628 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ackermannErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2023-02-18 07:27:25,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 07:27:25,628 INFO L85 PathProgramCache]: Analyzing trace with hash 2013961680, now seen corresponding path program 1 times [2023-02-18 07:27:25,628 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 07:27:25,628 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [516981661] [2023-02-18 07:27:25,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 07:27:25,629 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 07:27:25,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 07:27:25,699 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 111 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-02-18 07:27:25,699 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 07:27:25,699 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [516981661] [2023-02-18 07:27:25,699 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [516981661] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 07:27:25,700 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [858716732] [2023-02-18 07:27:25,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 07:27:25,700 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 07:27:25,700 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 07:27:25,701 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 07:27:25,737 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-02-18 07:27:25,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 07:27:25,753 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 18 conjunts are in the unsatisfiable core [2023-02-18 07:27:25,753 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 07:27:25,819 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 111 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-02-18 07:27:25,819 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 07:27:25,939 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 111 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-02-18 07:27:25,939 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [858716732] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 07:27:25,939 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 07:27:25,940 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 23 [2023-02-18 07:27:25,940 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1040466610] [2023-02-18 07:27:25,940 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 07:27:25,940 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-02-18 07:27:25,940 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 07:27:25,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-02-18 07:27:25,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=416, Unknown=0, NotChecked=0, Total=552 [2023-02-18 07:27:25,941 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) [2023-02-18 07:27:26,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 07:27:26,785 INFO L93 Difference]: Finished difference Result 9358 states and 17609 transitions. [2023-02-18 07:27:26,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2023-02-18 07:27:26,786 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 3.652173913043478) internal successors, (84), 14 states have internal predecessors, (84), 10 states have call successors, (16), 10 states have call predecessors, (16), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2023-02-18 07:27:26,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 07:27:26,849 INFO L225 Difference]: With dead ends: 9358 [2023-02-18 07:27:26,849 INFO L226 Difference]: Without dead ends: 9357 [2023-02-18 07:27:26,854 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 91 SyntacticMatches, 17 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 439 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=554, Invalid=1252, Unknown=0, NotChecked=0, Total=1806 [2023-02-18 07:27:26,854 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 722 mSDsluCounter, 310 mSDsCounter, 0 mSdLazyCounter, 465 mSolverCounterSat, 291 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s 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, 0.3s IncrementalHoareTripleChecker+Time [2023-02-18 07:27:26,855 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [728 Valid, 340 Invalid, 756 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [291 Valid, 465 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-18 07:27:26,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9357 states. [2023-02-18 07:27:27,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9357 to 8660. [2023-02-18 07:27:27,345 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) [2023-02-18 07:27:27,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8660 states to 8660 states and 16472 transitions. [2023-02-18 07:27:27,439 INFO L78 Accepts]: Start accepts. Automaton has 8660 states and 16472 transitions. Word has length 57 [2023-02-18 07:27:27,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 07:27:27,440 INFO L495 AbstractCegarLoop]: Abstraction has 8660 states and 16472 transitions. [2023-02-18 07:27:27,440 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 3.652173913043478) internal successors, (84), 14 states have internal predecessors, (84), 10 states have call successors, (16), 10 states have call predecessors, (16), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 07:27:27,440 INFO L276 IsEmpty]: Start isEmpty. Operand 8660 states and 16472 transitions. [2023-02-18 07:27:27,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2023-02-18 07:27:27,441 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 07:27:27,441 INFO L195 NwaCegarLoop]: trace histogram [6, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 07:27:27,448 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2023-02-18 07:27:27,646 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 [2023-02-18 07:27:27,646 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ackermannErr6ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2023-02-18 07:27:27,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 07:27:27,647 INFO L85 PathProgramCache]: Analyzing trace with hash -814290418, now seen corresponding path program 1 times [2023-02-18 07:27:27,647 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 07:27:27,647 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1413371163] [2023-02-18 07:27:27,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 07:27:27,647 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 07:27:27,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 07:27:27,692 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-02-18 07:27:27,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 07:27:27,720 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-02-18 07:27:27,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 07:27:27,735 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-02-18 07:27:27,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 07:27:27,751 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2023-02-18 07:27:27,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 07:27:27,769 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 36 proven. 6 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-02-18 07:27:27,770 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 07:27:27,770 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1413371163] [2023-02-18 07:27:27,770 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1413371163] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 07:27:27,770 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [965776084] [2023-02-18 07:27:27,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 07:27:27,770 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 07:27:27,770 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 07:27:27,771 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 07:27:27,774 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-02-18 07:27:27,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 07:27:27,812 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 15 conjunts are in the unsatisfiable core [2023-02-18 07:27:27,813 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 07:27:27,847 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 27 proven. 10 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2023-02-18 07:27:27,847 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 07:27:27,989 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 40 proven. 2 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-02-18 07:27:27,989 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [965776084] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 07:27:27,989 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 07:27:27,989 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 13] total 26 [2023-02-18 07:27:27,989 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [266365686] [2023-02-18 07:27:27,989 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 07:27:27,990 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-02-18 07:27:27,991 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 07:27:27,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-02-18 07:27:27,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=608, Unknown=0, NotChecked=0, Total=702 [2023-02-18 07:27:27,992 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) [2023-02-18 07:27:29,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 07:27:29,960 INFO L93 Difference]: Finished difference Result 30195 states and 100270 transitions. [2023-02-18 07:27:29,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2023-02-18 07:27:29,961 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 2.3846153846153846) internal successors, (62), 21 states have internal predecessors, (62), 5 states have call successors, (7), 3 states have call predecessors, (7), 8 states have return successors, (9), 8 states have call predecessors, (9), 3 states have call successors, (9) Word has length 55 [2023-02-18 07:27:29,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 07:27:30,242 INFO L225 Difference]: With dead ends: 30195 [2023-02-18 07:27:30,243 INFO L226 Difference]: Without dead ends: 22200 [2023-02-18 07:27:30,346 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 [2023-02-18 07:27:30,347 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 158 mSDsluCounter, 269 mSDsCounter, 0 mSdLazyCounter, 804 mSolverCounterSat, 257 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 158 SdHoareTripleChecker+Valid, 305 SdHoareTripleChecker+Invalid, 1061 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 257 IncrementalHoareTripleChecker+Valid, 804 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-18 07:27:30,348 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [158 Valid, 305 Invalid, 1061 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [257 Valid, 804 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-18 07:27:30,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22200 states. [2023-02-18 07:27:31,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22200 to 17548. [2023-02-18 07:27:32,025 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) [2023-02-18 07:27:32,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17548 states to 17548 states and 59714 transitions. [2023-02-18 07:27:32,415 INFO L78 Accepts]: Start accepts. Automaton has 17548 states and 59714 transitions. Word has length 55 [2023-02-18 07:27:32,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 07:27:32,415 INFO L495 AbstractCegarLoop]: Abstraction has 17548 states and 59714 transitions. [2023-02-18 07:27:32,416 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 2.3846153846153846) internal successors, (62), 21 states have internal predecessors, (62), 5 states have call successors, (7), 3 states have call predecessors, (7), 8 states have return successors, (9), 8 states have call predecessors, (9), 3 states have call successors, (9) [2023-02-18 07:27:32,416 INFO L276 IsEmpty]: Start isEmpty. Operand 17548 states and 59714 transitions. [2023-02-18 07:27:32,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2023-02-18 07:27:32,419 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 07:27:32,419 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] [2023-02-18 07:27:32,424 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2023-02-18 07:27:32,622 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 [2023-02-18 07:27:32,623 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ackermannErr6ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2023-02-18 07:27:32,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 07:27:32,624 INFO L85 PathProgramCache]: Analyzing trace with hash -1106576793, now seen corresponding path program 2 times [2023-02-18 07:27:32,624 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 07:27:32,624 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [91115547] [2023-02-18 07:27:32,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 07:27:32,624 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 07:27:32,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 07:27:32,703 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-02-18 07:27:32,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 07:27:32,889 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-02-18 07:27:32,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 07:27:32,913 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-02-18 07:27:32,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 07:27:32,929 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-02-18 07:27:32,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 07:27:32,946 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2023-02-18 07:27:32,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 07:27:32,965 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 70 proven. 16 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2023-02-18 07:27:32,965 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 07:27:32,966 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [91115547] [2023-02-18 07:27:32,966 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [91115547] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 07:27:32,966 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [300486220] [2023-02-18 07:27:32,966 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-18 07:27:32,966 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 07:27:32,966 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 07:27:32,981 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 07:27:32,982 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-02-18 07:27:33,042 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-18 07:27:33,042 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 07:27:33,043 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 19 conjunts are in the unsatisfiable core [2023-02-18 07:27:33,044 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 07:27:33,107 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 59 proven. 22 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2023-02-18 07:27:33,107 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 07:27:33,313 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 78 proven. 8 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2023-02-18 07:27:33,313 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [300486220] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 07:27:33,313 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 07:27:33,313 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 16] total 32 [2023-02-18 07:27:33,314 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [794359875] [2023-02-18 07:27:33,314 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 07:27:33,316 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-02-18 07:27:33,316 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 07:27:33,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-02-18 07:27:33,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=930, Unknown=0, NotChecked=0, Total=1056 [2023-02-18 07:27:33,317 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) [2023-02-18 07:27:34,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 07:27:34,815 INFO L93 Difference]: Finished difference Result 29333 states and 97052 transitions. [2023-02-18 07:27:34,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2023-02-18 07:27:34,816 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 [2023-02-18 07:27:34,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 07:27:35,041 INFO L225 Difference]: With dead ends: 29333 [2023-02-18 07:27:35,042 INFO L226 Difference]: Without dead ends: 12445 [2023-02-18 07:27:35,212 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 126 SyntacticMatches, 14 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 643 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=750, Invalid=3032, Unknown=0, NotChecked=0, Total=3782 [2023-02-18 07:27:35,213 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, 0.2s IncrementalHoareTripleChecker+Time [2023-02-18 07:27:35,213 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [229 Valid, 299 Invalid, 849 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [216 Valid, 633 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-18 07:27:35,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12445 states. [2023-02-18 07:27:35,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12445 to 11049. [2023-02-18 07:27:35,948 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) [2023-02-18 07:27:35,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11049 states to 11049 states and 16599 transitions. [2023-02-18 07:27:35,989 INFO L78 Accepts]: Start accepts. Automaton has 11049 states and 16599 transitions. Word has length 72 [2023-02-18 07:27:35,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 07:27:35,989 INFO L495 AbstractCegarLoop]: Abstraction has 11049 states and 16599 transitions. [2023-02-18 07:27:35,989 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 32 states have (on average 2.4375) internal successors, (78), 23 states have internal predecessors, (78), 7 states have call successors, (9), 5 states have call predecessors, (9), 8 states have return successors, (11), 10 states have call predecessors, (11), 3 states have call successors, (11) [2023-02-18 07:27:35,990 INFO L276 IsEmpty]: Start isEmpty. Operand 11049 states and 16599 transitions. [2023-02-18 07:27:35,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2023-02-18 07:27:35,998 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 07:27:35,999 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] [2023-02-18 07:27:36,021 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-02-18 07:27:36,203 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 [2023-02-18 07:27:36,204 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ackermannErr6ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2023-02-18 07:27:36,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 07:27:36,204 INFO L85 PathProgramCache]: Analyzing trace with hash 2104709525, now seen corresponding path program 4 times [2023-02-18 07:27:36,204 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 07:27:36,205 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [244150853] [2023-02-18 07:27:36,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 07:27:36,205 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 07:27:36,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 07:27:36,331 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2023-02-18 07:27:36,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 07:27:36,350 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 4 proven. 158 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-02-18 07:27:36,350 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 07:27:36,350 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [244150853] [2023-02-18 07:27:36,350 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [244150853] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 07:27:36,350 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [964667712] [2023-02-18 07:27:36,351 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-18 07:27:36,351 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 07:27:36,351 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 07:27:36,352 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 07:27:36,389 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-02-18 07:27:36,447 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-18 07:27:36,448 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 07:27:36,448 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 19 conjunts are in the unsatisfiable core [2023-02-18 07:27:36,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 07:27:36,492 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 103 proven. 4 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2023-02-18 07:27:36,492 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 07:27:36,506 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 103 proven. 4 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2023-02-18 07:27:36,506 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [964667712] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 07:27:36,506 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 07:27:36,507 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 6, 6] total 23 [2023-02-18 07:27:36,507 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1263474271] [2023-02-18 07:27:36,507 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 07:27:36,507 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-02-18 07:27:36,508 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 07:27:36,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-02-18 07:27:36,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=430, Unknown=0, NotChecked=0, Total=506 [2023-02-18 07:27:36,509 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) [2023-02-18 07:27:37,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 07:27:37,320 INFO L93 Difference]: Finished difference Result 11583 states and 17379 transitions. [2023-02-18 07:27:37,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-02-18 07:27:37,320 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 [2023-02-18 07:27:37,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 07:27:37,351 INFO L225 Difference]: With dead ends: 11583 [2023-02-18 07:27:37,351 INFO L226 Difference]: Without dead ends: 9316 [2023-02-18 07:27:37,359 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 265 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=374, Invalid=1348, Unknown=0, NotChecked=0, Total=1722 [2023-02-18 07:27:37,363 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 [2023-02-18 07:27:37,364 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] [2023-02-18 07:27:37,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9316 states. [2023-02-18 07:27:37,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9316 to 8750. [2023-02-18 07:27:37,827 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) [2023-02-18 07:27:37,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8750 states to 8750 states and 13768 transitions. [2023-02-18 07:27:37,858 INFO L78 Accepts]: Start accepts. Automaton has 8750 states and 13768 transitions. Word has length 67 [2023-02-18 07:27:37,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 07:27:37,859 INFO L495 AbstractCegarLoop]: Abstraction has 8750 states and 13768 transitions. [2023-02-18 07:27:37,859 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) [2023-02-18 07:27:37,859 INFO L276 IsEmpty]: Start isEmpty. Operand 8750 states and 13768 transitions. [2023-02-18 07:27:37,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2023-02-18 07:27:37,861 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 07:27:37,861 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 6, 6, 6, 5, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 07:27:37,871 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2023-02-18 07:27:38,065 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 [2023-02-18 07:27:38,066 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ackermannErr6ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2023-02-18 07:27:38,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 07:27:38,066 INFO L85 PathProgramCache]: Analyzing trace with hash 1935422832, now seen corresponding path program 3 times [2023-02-18 07:27:38,066 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 07:27:38,067 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [198544739] [2023-02-18 07:27:38,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 07:27:38,068 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 07:27:38,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 07:27:38,148 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-02-18 07:27:38,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 07:27:38,164 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-02-18 07:27:38,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 07:27:38,183 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 62 proven. 77 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-02-18 07:27:38,183 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 07:27:38,183 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [198544739] [2023-02-18 07:27:38,184 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [198544739] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 07:27:38,184 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1302309063] [2023-02-18 07:27:38,184 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-18 07:27:38,184 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 07:27:38,184 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 07:27:38,198 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 07:27:38,261 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-02-18 07:27:38,310 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2023-02-18 07:27:38,311 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 07:27:38,312 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 17 conjunts are in the unsatisfiable core [2023-02-18 07:27:38,312 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 07:27:38,376 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 60 proven. 79 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-02-18 07:27:38,376 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 07:27:38,539 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 64 proven. 75 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-02-18 07:27:38,539 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1302309063] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 07:27:38,539 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 07:27:38,539 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 33 [2023-02-18 07:27:38,539 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1006264674] [2023-02-18 07:27:38,539 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 07:27:38,540 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-02-18 07:27:38,540 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 07:27:38,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-02-18 07:27:38,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=949, Unknown=0, NotChecked=0, Total=1122 [2023-02-18 07:27:38,541 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) [2023-02-18 07:27:39,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 07:27:39,366 INFO L93 Difference]: Finished difference Result 9401 states and 14766 transitions. [2023-02-18 07:27:39,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-02-18 07:27:39,367 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 3.121212121212121) internal successors, (103), 22 states have internal predecessors, (103), 11 states have call successors, (13), 11 states have call predecessors, (13), 5 states have return successors, (5), 4 states have call predecessors, (5), 1 states have call successors, (5) Word has length 68 [2023-02-18 07:27:39,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 07:27:39,400 INFO L225 Difference]: With dead ends: 9401 [2023-02-18 07:27:39,400 INFO L226 Difference]: Without dead ends: 9400 [2023-02-18 07:27:39,404 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 115 SyntacticMatches, 12 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 533 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=573, Invalid=1977, Unknown=0, NotChecked=0, Total=2550 [2023-02-18 07:27:39,405 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 [2023-02-18 07:27:39,405 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] [2023-02-18 07:27:39,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9400 states. [2023-02-18 07:27:39,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9400 to 8858. [2023-02-18 07:27:39,944 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) [2023-02-18 07:27:39,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8858 states to 8858 states and 13916 transitions. [2023-02-18 07:27:39,978 INFO L78 Accepts]: Start accepts. Automaton has 8858 states and 13916 transitions. Word has length 68 [2023-02-18 07:27:39,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 07:27:39,979 INFO L495 AbstractCegarLoop]: Abstraction has 8858 states and 13916 transitions. [2023-02-18 07:27:39,979 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 33 states have (on average 3.121212121212121) internal successors, (103), 22 states have internal predecessors, (103), 11 states have call successors, (13), 11 states have call predecessors, (13), 5 states have return successors, (5), 4 states have call predecessors, (5), 1 states have call successors, (5) [2023-02-18 07:27:39,979 INFO L276 IsEmpty]: Start isEmpty. Operand 8858 states and 13916 transitions. [2023-02-18 07:27:39,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2023-02-18 07:27:39,982 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 07:27:39,982 INFO L195 NwaCegarLoop]: trace histogram [10, 7, 6, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2023-02-18 07:27:40,003 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2023-02-18 07:27:40,187 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 [2023-02-18 07:27:40,187 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2023-02-18 07:27:40,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 07:27:40,188 INFO L85 PathProgramCache]: Analyzing trace with hash -2007669540, now seen corresponding path program 2 times [2023-02-18 07:27:40,188 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 07:27:40,188 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [313741868] [2023-02-18 07:27:40,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 07:27:40,188 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 07:27:40,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 07:27:40,223 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2023-02-18 07:27:40,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 07:27:40,244 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-02-18 07:27:40,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 07:27:40,267 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-02-18 07:27:40,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 07:27:40,300 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-02-18 07:27:40,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 07:27:40,310 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-02-18 07:27:40,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 07:27:40,313 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2023-02-18 07:27:40,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 07:27:40,315 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2023-02-18 07:27:40,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 07:27:40,317 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 103 proven. 24 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2023-02-18 07:27:40,317 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 07:27:40,317 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [313741868] [2023-02-18 07:27:40,317 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [313741868] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 07:27:40,317 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1637533540] [2023-02-18 07:27:40,317 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-18 07:27:40,318 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 07:27:40,318 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 07:27:40,319 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 07:27:40,321 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-02-18 07:27:40,377 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-18 07:27:40,377 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 07:27:40,378 INFO L263 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 7 conjunts are in the unsatisfiable core [2023-02-18 07:27:40,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 07:27:40,395 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 103 proven. 15 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2023-02-18 07:27:40,395 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 07:27:40,468 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 103 proven. 26 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2023-02-18 07:27:40,468 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1637533540] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 07:27:40,469 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 07:27:40,469 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 8] total 13 [2023-02-18 07:27:40,469 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1254232751] [2023-02-18 07:27:40,469 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 07:27:40,469 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-02-18 07:27:40,469 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 07:27:40,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-02-18 07:27:40,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2023-02-18 07:27:40,471 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) [2023-02-18 07:27:40,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 07:27:40,974 INFO L93 Difference]: Finished difference Result 17973 states and 31840 transitions. [2023-02-18 07:27:40,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-02-18 07:27:40,975 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 6.3076923076923075) internal successors, (82), 13 states have internal predecessors, (82), 12 states have call successors, (14), 2 states have call predecessors, (14), 7 states have return successors, (14), 6 states have call predecessors, (14), 11 states have call successors, (14) Word has length 89 [2023-02-18 07:27:40,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 07:27:41,055 INFO L225 Difference]: With dead ends: 17973 [2023-02-18 07:27:41,065 INFO L226 Difference]: Without dead ends: 9802 [2023-02-18 07:27:41,131 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 181 SyntacticMatches, 7 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=102, Invalid=204, Unknown=0, NotChecked=0, Total=306 [2023-02-18 07:27:41,145 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 73 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 139 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 07:27:41,145 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [75 Valid, 85 Invalid, 139 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 102 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 07:27:41,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9802 states. [2023-02-18 07:27:41,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9802 to 8852. [2023-02-18 07:27:41,572 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) [2023-02-18 07:27:41,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8852 states to 8852 states and 13830 transitions. [2023-02-18 07:27:41,606 INFO L78 Accepts]: Start accepts. Automaton has 8852 states and 13830 transitions. Word has length 89 [2023-02-18 07:27:41,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 07:27:41,606 INFO L495 AbstractCegarLoop]: Abstraction has 8852 states and 13830 transitions. [2023-02-18 07:27:41,607 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 6.3076923076923075) internal successors, (82), 13 states have internal predecessors, (82), 12 states have call successors, (14), 2 states have call predecessors, (14), 7 states have return successors, (14), 6 states have call predecessors, (14), 11 states have call successors, (14) [2023-02-18 07:27:41,607 INFO L276 IsEmpty]: Start isEmpty. Operand 8852 states and 13830 transitions. [2023-02-18 07:27:41,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2023-02-18 07:27:41,611 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 07:27:41,611 INFO L195 NwaCegarLoop]: trace histogram [11, 9, 6, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2023-02-18 07:27:41,629 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2023-02-18 07:27:41,816 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 [2023-02-18 07:27:41,816 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2023-02-18 07:27:41,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 07:27:41,816 INFO L85 PathProgramCache]: Analyzing trace with hash -1307053986, now seen corresponding path program 3 times [2023-02-18 07:27:41,816 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 07:27:41,817 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [758675245] [2023-02-18 07:27:41,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 07:27:41,817 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 07:27:41,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 07:27:41,867 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-02-18 07:27:41,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 07:27:41,919 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-02-18 07:27:41,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 07:27:41,951 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-02-18 07:27:41,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 07:27:41,993 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-02-18 07:27:41,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 07:27:42,019 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-02-18 07:27:42,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 07:27:42,038 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-02-18 07:27:42,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 07:27:42,045 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2023-02-18 07:27:42,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 07:27:42,049 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2023-02-18 07:27:42,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 07:27:42,054 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2023-02-18 07:27:42,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 07:27:42,058 INFO L134 CoverageAnalysis]: Checked inductivity of 266 backedges. 117 proven. 45 refuted. 0 times theorem prover too weak. 104 trivial. 0 not checked. [2023-02-18 07:27:42,059 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 07:27:42,059 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [758675245] [2023-02-18 07:27:42,059 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [758675245] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 07:27:42,059 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [43688865] [2023-02-18 07:27:42,059 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-18 07:27:42,059 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 07:27:42,059 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 07:27:42,081 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 07:27:42,082 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-02-18 07:27:42,148 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2023-02-18 07:27:42,148 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 07:27:42,149 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 12 conjunts are in the unsatisfiable core [2023-02-18 07:27:42,150 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 07:27:42,185 INFO L134 CoverageAnalysis]: Checked inductivity of 266 backedges. 153 proven. 26 refuted. 0 times theorem prover too weak. 87 trivial. 0 not checked. [2023-02-18 07:27:42,185 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 07:27:42,285 INFO L134 CoverageAnalysis]: Checked inductivity of 266 backedges. 123 proven. 57 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2023-02-18 07:27:42,286 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [43688865] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 07:27:42,286 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 07:27:42,286 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 11] total 16 [2023-02-18 07:27:42,287 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1907912599] [2023-02-18 07:27:42,287 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 07:27:42,288 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-02-18 07:27:42,288 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 07:27:42,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-02-18 07:27:42,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2023-02-18 07:27:42,289 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) [2023-02-18 07:27:43,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 07:27:43,085 INFO L93 Difference]: Finished difference Result 20482 states and 41518 transitions. [2023-02-18 07:27:43,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-02-18 07:27:43,086 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 5.1875) internal successors, (83), 16 states have internal predecessors, (83), 9 states have call successors, (14), 2 states have call predecessors, (14), 7 states have return successors, (17), 5 states have call predecessors, (17), 9 states have call successors, (17) Word has length 100 [2023-02-18 07:27:43,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 07:27:43,148 INFO L225 Difference]: With dead ends: 20482 [2023-02-18 07:27:43,149 INFO L226 Difference]: Without dead ends: 12345 [2023-02-18 07:27:43,207 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 [2023-02-18 07:27:43,207 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 66 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 151 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 195 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 151 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 07:27:43,208 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [73 Valid, 125 Invalid, 195 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 151 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 07:27:43,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12345 states. [2023-02-18 07:27:44,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12345 to 11980. [2023-02-18 07:27:44,036 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) [2023-02-18 07:27:44,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11980 states to 11980 states and 19050 transitions. [2023-02-18 07:27:44,103 INFO L78 Accepts]: Start accepts. Automaton has 11980 states and 19050 transitions. Word has length 100 [2023-02-18 07:27:44,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 07:27:44,103 INFO L495 AbstractCegarLoop]: Abstraction has 11980 states and 19050 transitions. [2023-02-18 07:27:44,104 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 5.1875) internal successors, (83), 16 states have internal predecessors, (83), 9 states have call successors, (14), 2 states have call predecessors, (14), 7 states have return successors, (17), 5 states have call predecessors, (17), 9 states have call successors, (17) [2023-02-18 07:27:44,104 INFO L276 IsEmpty]: Start isEmpty. Operand 11980 states and 19050 transitions. [2023-02-18 07:27:44,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2023-02-18 07:27:44,109 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 07:27:44,109 INFO L195 NwaCegarLoop]: trace histogram [10, 8, 7, 7, 7, 6, 6, 6, 4, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 07:27:44,120 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2023-02-18 07:27:44,313 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 [2023-02-18 07:27:44,314 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ackermannErr6ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2023-02-18 07:27:44,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 07:27:44,314 INFO L85 PathProgramCache]: Analyzing trace with hash 1104252262, now seen corresponding path program 3 times [2023-02-18 07:27:44,315 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 07:27:44,315 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1282026061] [2023-02-18 07:27:44,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 07:27:44,315 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 07:27:44,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 07:27:44,448 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-02-18 07:27:44,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 07:27:44,480 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-02-18 07:27:44,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 07:27:44,499 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-02-18 07:27:44,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 07:27:44,521 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2023-02-18 07:27:44,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 07:27:44,549 INFO L134 CoverageAnalysis]: Checked inductivity of 227 backedges. 120 proven. 86 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-02-18 07:27:44,549 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 07:27:44,549 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1282026061] [2023-02-18 07:27:44,549 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1282026061] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 07:27:44,549 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [650579341] [2023-02-18 07:27:44,549 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-18 07:27:44,550 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 07:27:44,550 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 07:27:44,551 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 07:27:44,553 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-02-18 07:27:44,629 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2023-02-18 07:27:44,629 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 07:27:44,630 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 31 conjunts are in the unsatisfiable core [2023-02-18 07:27:44,631 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 07:27:44,711 INFO L134 CoverageAnalysis]: Checked inductivity of 227 backedges. 113 proven. 41 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2023-02-18 07:27:44,711 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 07:27:44,773 INFO L134 CoverageAnalysis]: Checked inductivity of 227 backedges. 142 proven. 13 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2023-02-18 07:27:44,773 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [650579341] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 07:27:44,774 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 07:27:44,774 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 7, 8] total 29 [2023-02-18 07:27:44,774 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1316268350] [2023-02-18 07:27:44,774 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 07:27:44,775 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-02-18 07:27:44,775 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 07:27:44,775 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-02-18 07:27:44,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=723, Unknown=0, NotChecked=0, Total=812 [2023-02-18 07:27:44,776 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) [2023-02-18 07:27:45,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 07:27:45,891 INFO L93 Difference]: Finished difference Result 20826 states and 35598 transitions. [2023-02-18 07:27:45,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2023-02-18 07:27:45,891 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 3.6551724137931036) internal successors, (106), 22 states have internal predecessors, (106), 11 states have call successors, (15), 7 states have call predecessors, (15), 7 states have return successors, (10), 9 states have call predecessors, (10), 4 states have call successors, (10) Word has length 87 [2023-02-18 07:27:45,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 07:27:45,953 INFO L225 Difference]: With dead ends: 20826 [2023-02-18 07:27:45,954 INFO L226 Difference]: Without dead ends: 10351 [2023-02-18 07:27:46,011 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 [2023-02-18 07:27:46,011 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 191 mSDsluCounter, 146 mSDsCounter, 0 mSdLazyCounter, 1096 mSolverCounterSat, 189 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 191 SdHoareTripleChecker+Valid, 167 SdHoareTripleChecker+Invalid, 1285 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 189 IncrementalHoareTripleChecker+Valid, 1096 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-02-18 07:27:46,012 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [191 Valid, 167 Invalid, 1285 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [189 Valid, 1096 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-02-18 07:27:46,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10351 states. [2023-02-18 07:27:46,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10351 to 8751. [2023-02-18 07:27:46,591 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) [2023-02-18 07:27:46,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8751 states to 8751 states and 12063 transitions. [2023-02-18 07:27:46,620 INFO L78 Accepts]: Start accepts. Automaton has 8751 states and 12063 transitions. Word has length 87 [2023-02-18 07:27:46,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 07:27:46,620 INFO L495 AbstractCegarLoop]: Abstraction has 8751 states and 12063 transitions. [2023-02-18 07:27:46,620 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 3.6551724137931036) internal successors, (106), 22 states have internal predecessors, (106), 11 states have call successors, (15), 7 states have call predecessors, (15), 7 states have return successors, (10), 9 states have call predecessors, (10), 4 states have call successors, (10) [2023-02-18 07:27:46,621 INFO L276 IsEmpty]: Start isEmpty. Operand 8751 states and 12063 transitions. [2023-02-18 07:27:46,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2023-02-18 07:27:46,623 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 07:27:46,623 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 11, 11, 11, 10, 10, 10, 1, 1, 1, 1, 1, 1] [2023-02-18 07:27:46,637 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2023-02-18 07:27:46,828 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 [2023-02-18 07:27:46,828 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ackermannErr6ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2023-02-18 07:27:46,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 07:27:46,829 INFO L85 PathProgramCache]: Analyzing trace with hash -133792040, now seen corresponding path program 3 times [2023-02-18 07:27:46,829 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 07:27:46,829 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [574540164] [2023-02-18 07:27:46,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 07:27:46,830 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 07:27:46,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 07:27:47,082 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 0 proven. 420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 07:27:47,082 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 07:27:47,082 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [574540164] [2023-02-18 07:27:47,083 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [574540164] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 07:27:47,083 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2078902152] [2023-02-18 07:27:47,083 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-18 07:27:47,083 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 07:27:47,083 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 07:27:47,084 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 07:27:47,086 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-02-18 07:27:47,160 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2023-02-18 07:27:47,161 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 07:27:47,161 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 24 conjunts are in the unsatisfiable core [2023-02-18 07:27:47,162 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 07:27:47,326 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 0 proven. 420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 07:27:47,328 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 07:27:47,691 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 0 proven. 420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 07:27:47,692 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2078902152] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 07:27:47,692 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 07:27:47,692 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 47 [2023-02-18 07:27:47,692 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1283116528] [2023-02-18 07:27:47,692 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 07:27:47,692 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2023-02-18 07:27:47,692 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 07:27:47,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2023-02-18 07:27:47,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=556, Invalid=1700, Unknown=0, NotChecked=0, Total=2256 [2023-02-18 07:27:47,694 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) [2023-02-18 07:27:49,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 07:27:49,460 INFO L93 Difference]: Finished difference Result 15928 states and 22083 transitions. [2023-02-18 07:27:49,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2023-02-18 07:27:49,461 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 [2023-02-18 07:27:49,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 07:27:49,512 INFO L225 Difference]: With dead ends: 15928 [2023-02-18 07:27:49,513 INFO L226 Difference]: Without dead ends: 15927 [2023-02-18 07:27:49,524 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 [2023-02-18 07:27:49,524 INFO L413 NwaCegarLoop]: 67 mSDtfsCounter, 1198 mSDsluCounter, 591 mSDsCounter, 0 mSdLazyCounter, 839 mSolverCounterSat, 589 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1202 SdHoareTripleChecker+Valid, 658 SdHoareTripleChecker+Invalid, 1428 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 589 IncrementalHoareTripleChecker+Valid, 839 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-02-18 07:27:49,524 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1202 Valid, 658 Invalid, 1428 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [589 Valid, 839 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-02-18 07:27:49,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15927 states. [2023-02-18 07:27:50,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15927 to 15927. [2023-02-18 07:27:50,658 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) [2023-02-18 07:27:50,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15927 states to 15927 states and 22071 transitions. [2023-02-18 07:27:50,697 INFO L78 Accepts]: Start accepts. Automaton has 15927 states and 22071 transitions. Word has length 91 [2023-02-18 07:27:50,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 07:27:50,697 INFO L495 AbstractCegarLoop]: Abstraction has 15927 states and 22071 transitions. [2023-02-18 07:27:50,697 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) [2023-02-18 07:27:50,697 INFO L276 IsEmpty]: Start isEmpty. Operand 15927 states and 22071 transitions. [2023-02-18 07:27:50,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2023-02-18 07:27:50,700 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 07:27:50,701 INFO L195 NwaCegarLoop]: trace histogram [10, 8, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 07:27:50,707 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2023-02-18 07:27:50,905 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 [2023-02-18 07:27:50,907 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2023-02-18 07:27:50,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 07:27:50,907 INFO L85 PathProgramCache]: Analyzing trace with hash 1765664819, now seen corresponding path program 4 times [2023-02-18 07:27:50,907 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 07:27:50,907 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1305032531] [2023-02-18 07:27:50,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 07:27:50,907 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 07:27:50,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 07:27:50,990 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-02-18 07:27:50,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 07:27:51,040 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-02-18 07:27:51,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 07:27:51,083 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-02-18 07:27:51,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 07:27:51,110 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-02-18 07:27:51,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 07:27:51,126 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-02-18 07:27:51,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 07:27:51,144 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2023-02-18 07:27:51,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 07:27:51,168 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2023-02-18 07:27:51,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 07:27:51,174 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2023-02-18 07:27:51,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 07:27:51,182 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 51 proven. 69 refuted. 0 times theorem prover too weak. 101 trivial. 0 not checked. [2023-02-18 07:27:51,182 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 07:27:51,182 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1305032531] [2023-02-18 07:27:51,182 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1305032531] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 07:27:51,182 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1850260888] [2023-02-18 07:27:51,182 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-18 07:27:51,182 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 07:27:51,183 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 07:27:51,194 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) [2023-02-18 07:27:51,195 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-02-18 07:27:51,269 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-18 07:27:51,269 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 07:27:51,270 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 27 conjunts are in the unsatisfiable core [2023-02-18 07:27:51,271 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 07:27:51,344 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 34 proven. 71 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2023-02-18 07:27:51,344 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 07:27:51,739 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 42 proven. 93 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2023-02-18 07:27:51,740 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1850260888] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 07:27:51,740 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 07:27:51,740 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17, 23] total 42 [2023-02-18 07:27:51,740 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [311482546] [2023-02-18 07:27:51,740 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 07:27:51,740 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2023-02-18 07:27:51,740 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 07:27:51,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2023-02-18 07:27:51,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=207, Invalid=1599, Unknown=0, NotChecked=0, Total=1806 [2023-02-18 07:27:51,741 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) [2023-02-18 07:27:55,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 07:27:55,207 INFO L93 Difference]: Finished difference Result 45665 states and 72940 transitions. [2023-02-18 07:27:55,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 143 states. [2023-02-18 07:27:55,207 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 33 states have internal predecessors, (80), 9 states have call successors, (11), 3 states have call predecessors, (11), 14 states have return successors, (17), 16 states have call predecessors, (17), 7 states have call successors, (17) Word has length 91 [2023-02-18 07:27:55,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 07:27:55,522 INFO L225 Difference]: With dead ends: 45665 [2023-02-18 07:27:55,522 INFO L226 Difference]: Without dead ends: 44563 [2023-02-18 07:27:55,547 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 356 GetRequests, 165 SyntacticMatches, 12 SemanticMatches, 179 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12245 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=5454, Invalid=27126, Unknown=0, NotChecked=0, Total=32580 [2023-02-18 07:27:55,548 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 262 mSDsluCounter, 268 mSDsCounter, 0 mSdLazyCounter, 1538 mSolverCounterSat, 774 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 273 SdHoareTripleChecker+Valid, 290 SdHoareTripleChecker+Invalid, 2312 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 774 IncrementalHoareTripleChecker+Valid, 1538 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-02-18 07:27:55,548 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [273 Valid, 290 Invalid, 2312 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [774 Valid, 1538 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-02-18 07:27:55,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44563 states. [2023-02-18 07:27:57,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44563 to 28637. [2023-02-18 07:27:57,528 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) [2023-02-18 07:27:57,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28637 states to 28637 states and 44545 transitions. [2023-02-18 07:27:57,704 INFO L78 Accepts]: Start accepts. Automaton has 28637 states and 44545 transitions. Word has length 91 [2023-02-18 07:27:57,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 07:27:57,704 INFO L495 AbstractCegarLoop]: Abstraction has 28637 states and 44545 transitions. [2023-02-18 07:27:57,704 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 33 states have internal predecessors, (80), 9 states have call successors, (11), 3 states have call predecessors, (11), 14 states have return successors, (17), 16 states have call predecessors, (17), 7 states have call successors, (17) [2023-02-18 07:27:57,704 INFO L276 IsEmpty]: Start isEmpty. Operand 28637 states and 44545 transitions. [2023-02-18 07:27:57,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2023-02-18 07:27:57,712 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 07:27:57,712 INFO L195 NwaCegarLoop]: trace histogram [20, 20, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1] [2023-02-18 07:27:57,721 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2023-02-18 07:27:57,916 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 [2023-02-18 07:27:57,916 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ackermannErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2023-02-18 07:27:57,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 07:27:57,916 INFO L85 PathProgramCache]: Analyzing trace with hash 951429890, now seen corresponding path program 2 times [2023-02-18 07:27:57,917 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 07:27:57,917 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [614924090] [2023-02-18 07:27:57,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 07:27:57,917 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 07:27:57,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 07:27:58,244 INFO L134 CoverageAnalysis]: Checked inductivity of 894 backedges. 0 proven. 867 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2023-02-18 07:27:58,244 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 07:27:58,244 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [614924090] [2023-02-18 07:27:58,244 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [614924090] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 07:27:58,244 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [114170562] [2023-02-18 07:27:58,244 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-18 07:27:58,245 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 07:27:58,245 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 07:27:58,246 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) [2023-02-18 07:27:58,249 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2023-02-18 07:27:58,342 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-18 07:27:58,342 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 07:27:58,343 INFO L263 TraceCheckSpWp]: Trace formula consists of 342 conjuncts, 42 conjunts are in the unsatisfiable core [2023-02-18 07:27:58,345 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 07:27:58,617 INFO L134 CoverageAnalysis]: Checked inductivity of 894 backedges. 0 proven. 867 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2023-02-18 07:27:58,617 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 07:27:59,006 INFO L134 CoverageAnalysis]: Checked inductivity of 894 backedges. 0 proven. 867 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2023-02-18 07:27:59,007 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [114170562] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 07:27:59,007 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 07:27:59,007 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 47 [2023-02-18 07:27:59,007 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [106985568] [2023-02-18 07:27:59,007 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 07:27:59,008 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2023-02-18 07:27:59,008 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 07:27:59,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2023-02-18 07:27:59,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=556, Invalid=1700, Unknown=0, NotChecked=0, Total=2256 [2023-02-18 07:27:59,009 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) [2023-02-18 07:28:02,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 07:28:02,845 INFO L93 Difference]: Finished difference Result 64750 states and 101363 transitions. [2023-02-18 07:28:02,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2023-02-18 07:28:02,845 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 [2023-02-18 07:28:02,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 07:28:03,070 INFO L225 Difference]: With dead ends: 64750 [2023-02-18 07:28:03,071 INFO L226 Difference]: Without dead ends: 64749 [2023-02-18 07:28:03,097 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 365 GetRequests, 229 SyntacticMatches, 47 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2560 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=2534, Invalid=5656, Unknown=0, NotChecked=0, Total=8190 [2023-02-18 07:28:03,098 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 1532 mSDsluCounter, 514 mSDsCounter, 0 mSdLazyCounter, 919 mSolverCounterSat, 638 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1535 SdHoareTripleChecker+Valid, 541 SdHoareTripleChecker+Invalid, 1557 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 638 IncrementalHoareTripleChecker+Valid, 919 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-02-18 07:28:03,098 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1535 Valid, 541 Invalid, 1557 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [638 Valid, 919 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-02-18 07:28:03,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64749 states. [2023-02-18 07:28:06,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64749 to 64697. [2023-02-18 07:28:06,904 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) [2023-02-18 07:28:07,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64697 states to 64697 states and 101341 transitions. [2023-02-18 07:28:07,168 INFO L78 Accepts]: Start accepts. Automaton has 64697 states and 101341 transitions. Word has length 141 [2023-02-18 07:28:07,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 07:28:07,170 INFO L495 AbstractCegarLoop]: Abstraction has 64697 states and 101341 transitions. [2023-02-18 07:28:07,170 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) [2023-02-18 07:28:07,170 INFO L276 IsEmpty]: Start isEmpty. Operand 64697 states and 101341 transitions. [2023-02-18 07:28:07,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2023-02-18 07:28:07,186 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 07:28:07,186 INFO L195 NwaCegarLoop]: trace histogram [20, 17, 13, 9, 9, 9, 9, 8, 8, 7, 7, 7, 7, 7, 7, 6, 6, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1] [2023-02-18 07:28:07,190 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2023-02-18 07:28:07,390 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 [2023-02-18 07:28:07,390 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ackermannErr7ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2023-02-18 07:28:07,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 07:28:07,391 INFO L85 PathProgramCache]: Analyzing trace with hash 2095034448, now seen corresponding path program 1 times [2023-02-18 07:28:07,391 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 07:28:07,391 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [750831320] [2023-02-18 07:28:07,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 07:28:07,391 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 07:28:07,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 07:28:07,551 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2023-02-18 07:28:07,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 07:28:07,659 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-02-18 07:28:07,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 07:28:08,029 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-02-18 07:28:08,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 07:28:08,049 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-02-18 07:28:08,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 07:28:08,067 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-02-18 07:28:08,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 07:28:08,080 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-02-18 07:28:08,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 07:28:08,093 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2023-02-18 07:28:08,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 07:28:08,107 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2023-02-18 07:28:08,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 07:28:08,151 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-02-18 07:28:08,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 07:28:08,188 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-02-18 07:28:08,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 07:28:08,216 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-02-18 07:28:08,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 07:28:08,238 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-02-18 07:28:08,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 07:28:08,251 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-02-18 07:28:08,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 07:28:08,253 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2023-02-18 07:28:08,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 07:28:08,257 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2023-02-18 07:28:08,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 07:28:08,260 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2023-02-18 07:28:08,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 07:28:08,261 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2023-02-18 07:28:08,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 07:28:08,263 INFO L134 CoverageAnalysis]: Checked inductivity of 1025 backedges. 415 proven. 214 refuted. 0 times theorem prover too weak. 396 trivial. 0 not checked. [2023-02-18 07:28:08,263 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 07:28:08,264 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [750831320] [2023-02-18 07:28:08,264 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [750831320] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 07:28:08,264 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [861398283] [2023-02-18 07:28:08,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 07:28:08,264 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 07:28:08,264 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 07:28:08,265 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) [2023-02-18 07:28:08,267 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2023-02-18 07:28:08,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 07:28:08,374 INFO L263 TraceCheckSpWp]: Trace formula consists of 456 conjuncts, 25 conjunts are in the unsatisfiable core [2023-02-18 07:28:08,376 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 07:28:08,450 INFO L134 CoverageAnalysis]: Checked inductivity of 1025 backedges. 403 proven. 216 refuted. 0 times theorem prover too weak. 406 trivial. 0 not checked. [2023-02-18 07:28:08,450 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 07:28:08,914 INFO L134 CoverageAnalysis]: Checked inductivity of 1025 backedges. 419 proven. 263 refuted. 0 times theorem prover too weak. 343 trivial. 0 not checked. [2023-02-18 07:28:08,914 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [861398283] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 07:28:08,915 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 07:28:08,915 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 21] total 27 [2023-02-18 07:28:08,915 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [434972909] [2023-02-18 07:28:08,915 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 07:28:08,916 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-02-18 07:28:08,916 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 07:28:08,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-02-18 07:28:08,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=589, Unknown=0, NotChecked=0, Total=702 [2023-02-18 07:28:08,917 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)