./Ultimate.py --spec ../sv-benchmarks/c/properties/no-overflow.prp --file ../sv-benchmarks/c/recursive/Ackermann01-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version 574ddb4e Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/recursive/Ackermann01-2.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 93bcf8b6df587e0bc8cb137c6415932ffc9083999b1b09826c5b148989ca1a7b --- Real Ultimate output --- This is Ultimate 0.2.2-?-574ddb4 [2023-02-17 09:06:15,553 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-02-17 09:06:15,554 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-02-17 09:06:15,590 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-02-17 09:06:15,591 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-02-17 09:06:15,593 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-02-17 09:06:15,596 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-02-17 09:06:15,599 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-02-17 09:06:15,600 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-02-17 09:06:15,605 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-02-17 09:06:15,606 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-02-17 09:06:15,608 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-02-17 09:06:15,608 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-02-17 09:06:15,611 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-02-17 09:06:15,612 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-02-17 09:06:15,613 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-02-17 09:06:15,614 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-02-17 09:06:15,615 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-02-17 09:06:15,616 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-02-17 09:06:15,619 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-02-17 09:06:15,621 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-02-17 09:06:15,621 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-02-17 09:06:15,622 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-02-17 09:06:15,623 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-02-17 09:06:15,630 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-02-17 09:06:15,632 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-02-17 09:06:15,633 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-02-17 09:06:15,633 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-02-17 09:06:15,634 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-02-17 09:06:15,635 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-02-17 09:06:15,635 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-02-17 09:06:15,636 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-02-17 09:06:15,637 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-02-17 09:06:15,638 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-02-17 09:06:15,639 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-02-17 09:06:15,639 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-02-17 09:06:15,639 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-02-17 09:06:15,639 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-02-17 09:06:15,640 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-02-17 09:06:15,640 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-02-17 09:06:15,641 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-02-17 09:06:15,642 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Overflow-32bit-Automizer_Default.epf [2023-02-17 09:06:15,669 INFO L113 SettingsManager]: Loading preferences was successful [2023-02-17 09:06:15,671 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-02-17 09:06:15,671 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-02-17 09:06:15,672 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-02-17 09:06:15,672 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-02-17 09:06:15,673 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-02-17 09:06:15,673 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-02-17 09:06:15,673 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-02-17 09:06:15,673 INFO L138 SettingsManager]: * Use SBE=true [2023-02-17 09:06:15,673 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-02-17 09:06:15,674 INFO L138 SettingsManager]: * sizeof long=4 [2023-02-17 09:06:15,674 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-02-17 09:06:15,674 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-02-17 09:06:15,675 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-02-17 09:06:15,675 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-02-17 09:06:15,675 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-02-17 09:06:15,675 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-02-17 09:06:15,675 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-02-17 09:06:15,675 INFO L138 SettingsManager]: * Check absence of signed integer overflows=true [2023-02-17 09:06:15,675 INFO L138 SettingsManager]: * sizeof long double=12 [2023-02-17 09:06:15,676 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-02-17 09:06:15,676 INFO L138 SettingsManager]: * Use constant arrays=true [2023-02-17 09:06:15,676 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-02-17 09:06:15,676 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-02-17 09:06:15,676 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-02-17 09:06:15,676 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-02-17 09:06:15,676 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-17 09:06:15,677 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-02-17 09:06:15,677 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-02-17 09:06:15,677 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-02-17 09:06:15,677 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-02-17 09:06:15,677 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-02-17 09:06:15,678 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-02-17 09:06:15,678 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-02-17 09:06:15,678 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-02-17 09:06:15,678 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-02-17 09:06:15,678 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-02-17 09:06:15,678 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 93bcf8b6df587e0bc8cb137c6415932ffc9083999b1b09826c5b148989ca1a7b [2023-02-17 09:06:15,877 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-02-17 09:06:15,903 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-02-17 09:06:15,905 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-02-17 09:06:15,905 INFO L271 PluginConnector]: Initializing CDTParser... [2023-02-17 09:06:15,906 INFO L275 PluginConnector]: CDTParser initialized [2023-02-17 09:06:15,907 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/recursive/Ackermann01-2.c [2023-02-17 09:06:16,935 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-02-17 09:06:17,098 INFO L351 CDTParser]: Found 1 translation units. [2023-02-17 09:06:17,098 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursive/Ackermann01-2.c [2023-02-17 09:06:17,102 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a8c6da979/203e4b9490ac4d958cf914c04ef9efa5/FLAG5674b9571 [2023-02-17 09:06:17,115 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a8c6da979/203e4b9490ac4d958cf914c04ef9efa5 [2023-02-17 09:06:17,117 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-02-17 09:06:17,118 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-02-17 09:06:17,120 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-02-17 09:06:17,120 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-02-17 09:06:17,123 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-02-17 09:06:17,123 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.02 09:06:17" (1/1) ... [2023-02-17 09:06:17,126 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4b26741 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 09:06:17, skipping insertion in model container [2023-02-17 09:06:17,126 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.02 09:06:17" (1/1) ... [2023-02-17 09:06:17,131 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-02-17 09:06:17,142 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-02-17 09:06:17,244 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/Ackermann01-2.c[1234,1247] [2023-02-17 09:06:17,245 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-17 09:06:17,253 INFO L203 MainTranslator]: Completed pre-run [2023-02-17 09:06:17,266 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/Ackermann01-2.c[1234,1247] [2023-02-17 09:06:17,267 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-17 09:06:17,276 INFO L208 MainTranslator]: Completed translation [2023-02-17 09:06:17,276 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 09:06:17 WrapperNode [2023-02-17 09:06:17,276 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-02-17 09:06:17,277 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-02-17 09:06:17,277 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-02-17 09:06:17,277 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-02-17 09:06:17,281 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 09:06:17" (1/1) ... [2023-02-17 09:06:17,287 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 09:06:17" (1/1) ... [2023-02-17 09:06:17,298 INFO L138 Inliner]: procedures = 13, calls = 11, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 32 [2023-02-17 09:06:17,298 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-02-17 09:06:17,298 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-02-17 09:06:17,299 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-02-17 09:06:17,299 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-02-17 09:06:17,305 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 09:06:17" (1/1) ... [2023-02-17 09:06:17,305 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 09:06:17" (1/1) ... [2023-02-17 09:06:17,313 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 09:06:17" (1/1) ... [2023-02-17 09:06:17,314 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 09:06:17" (1/1) ... [2023-02-17 09:06:17,321 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 09:06:17" (1/1) ... [2023-02-17 09:06:17,323 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 09:06:17" (1/1) ... [2023-02-17 09:06:17,327 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 09:06:17" (1/1) ... [2023-02-17 09:06:17,328 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 09:06:17" (1/1) ... [2023-02-17 09:06:17,329 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-02-17 09:06:17,330 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-02-17 09:06:17,330 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-02-17 09:06:17,330 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-02-17 09:06:17,331 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 09:06:17" (1/1) ... [2023-02-17 09:06:17,336 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-17 09:06:17,343 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 09:06:17,354 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-02-17 09:06:17,373 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-02-17 09:06:17,386 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-02-17 09:06:17,386 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-02-17 09:06:17,386 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-02-17 09:06:17,386 INFO L130 BoogieDeclarations]: Found specification of procedure ackermann [2023-02-17 09:06:17,386 INFO L138 BoogieDeclarations]: Found implementation of procedure ackermann [2023-02-17 09:06:17,386 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-02-17 09:06:17,429 INFO L235 CfgBuilder]: Building ICFG [2023-02-17 09:06:17,431 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2023-02-17 09:06:17,546 INFO L276 CfgBuilder]: Performing block encoding [2023-02-17 09:06:17,550 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-02-17 09:06:17,550 INFO L300 CfgBuilder]: Removed 0 assume(true) statements. [2023-02-17 09:06:17,551 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.02 09:06:17 BoogieIcfgContainer [2023-02-17 09:06:17,552 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-02-17 09:06:17,553 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-02-17 09:06:17,553 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-02-17 09:06:17,556 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-02-17 09:06:17,556 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.02 09:06:17" (1/3) ... [2023-02-17 09:06:17,557 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2825eb5d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.02 09:06:17, skipping insertion in model container [2023-02-17 09:06:17,557 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 09:06:17" (2/3) ... [2023-02-17 09:06:17,557 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2825eb5d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.02 09:06:17, skipping insertion in model container [2023-02-17 09:06:17,557 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.02 09:06:17" (3/3) ... [2023-02-17 09:06:17,559 INFO L112 eAbstractionObserver]: Analyzing ICFG Ackermann01-2.c [2023-02-17 09:06:17,570 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-02-17 09:06:17,571 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 8 error locations. [2023-02-17 09:06:17,615 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-02-17 09:06:17,620 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;@17efa97e, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-02-17 09:06:17,620 INFO L358 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2023-02-17 09:06:17,623 INFO L276 IsEmpty]: Start isEmpty. Operand has 38 states, 24 states have (on average 1.5416666666666667) internal successors, (37), 32 states have internal predecessors, (37), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-02-17 09:06:17,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-02-17 09:06:17,627 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 09:06:17,628 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 09:06:17,628 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2023-02-17 09:06:17,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 09:06:17,631 INFO L85 PathProgramCache]: Analyzing trace with hash 180762217, now seen corresponding path program 1 times [2023-02-17 09:06:17,638 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 09:06:17,638 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [883462866] [2023-02-17 09:06:17,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 09:06:17,638 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 09:06:17,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 09:06:17,779 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 09:06:17,780 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 09:06:17,780 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [883462866] [2023-02-17 09:06:17,780 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [883462866] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 09:06:17,780 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 09:06:17,781 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-17 09:06:17,782 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1380660824] [2023-02-17 09:06:17,782 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 09:06:17,785 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-17 09:06:17,785 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 09:06:17,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-17 09:06:17,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-02-17 09:06:17,804 INFO L87 Difference]: Start difference. First operand has 38 states, 24 states have (on average 1.5416666666666667) internal successors, (37), 32 states have internal predecessors, (37), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 5 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 09:06:17,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 09:06:17,893 INFO L93 Difference]: Finished difference Result 73 states and 85 transitions. [2023-02-17 09:06:17,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-17 09:06:17,896 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2023-02-17 09:06:17,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 09:06:17,901 INFO L225 Difference]: With dead ends: 73 [2023-02-17 09:06:17,901 INFO L226 Difference]: Without dead ends: 59 [2023-02-17 09:06:17,905 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-02-17 09:06:17,907 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 55 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-17 09:06:17,908 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [57 Valid, 119 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-17 09:06:17,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2023-02-17 09:06:17,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 51. [2023-02-17 09:06:17,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 34 states have (on average 1.5294117647058822) internal successors, (52), 42 states have internal predecessors, (52), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-02-17 09:06:17,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 65 transitions. [2023-02-17 09:06:17,940 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 65 transitions. Word has length 8 [2023-02-17 09:06:17,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 09:06:17,941 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 65 transitions. [2023-02-17 09:06:17,941 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 09:06:17,941 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 65 transitions. [2023-02-17 09:06:17,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2023-02-17 09:06:17,942 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 09:06:17,942 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 09:06:17,942 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-02-17 09:06:17,942 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2023-02-17 09:06:17,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 09:06:17,943 INFO L85 PathProgramCache]: Analyzing trace with hash 1308666490, now seen corresponding path program 1 times [2023-02-17 09:06:17,943 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 09:06:17,943 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [205049612] [2023-02-17 09:06:17,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 09:06:17,944 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 09:06:17,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 09:06:18,019 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 09:06:18,019 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 09:06:18,019 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [205049612] [2023-02-17 09:06:18,020 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [205049612] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 09:06:18,020 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 09:06:18,020 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-17 09:06:18,020 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1043132160] [2023-02-17 09:06:18,020 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 09:06:18,021 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-17 09:06:18,021 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 09:06:18,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-17 09:06:18,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-02-17 09:06:18,022 INFO L87 Difference]: Start difference. First operand 51 states and 65 transitions. Second operand has 5 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 09:06:18,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 09:06:18,119 INFO L93 Difference]: Finished difference Result 101 states and 137 transitions. [2023-02-17 09:06:18,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-17 09:06:18,120 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2023-02-17 09:06:18,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 09:06:18,121 INFO L225 Difference]: With dead ends: 101 [2023-02-17 09:06:18,121 INFO L226 Difference]: Without dead ends: 95 [2023-02-17 09:06:18,122 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-02-17 09:06:18,123 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 48 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-17 09:06:18,123 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 91 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-17 09:06:18,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2023-02-17 09:06:18,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 85. [2023-02-17 09:06:18,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 61 states have (on average 1.5081967213114753) internal successors, (92), 70 states have internal predecessors, (92), 13 states have call successors, (13), 4 states have call predecessors, (13), 3 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2023-02-17 09:06:18,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 115 transitions. [2023-02-17 09:06:18,136 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 115 transitions. Word has length 9 [2023-02-17 09:06:18,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 09:06:18,137 INFO L495 AbstractCegarLoop]: Abstraction has 85 states and 115 transitions. [2023-02-17 09:06:18,137 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 09:06:18,137 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 115 transitions. [2023-02-17 09:06:18,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2023-02-17 09:06:18,137 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 09:06:18,138 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 09:06:18,138 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-02-17 09:06:18,138 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2023-02-17 09:06:18,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 09:06:18,139 INFO L85 PathProgramCache]: Analyzing trace with hash 1308661493, now seen corresponding path program 1 times [2023-02-17 09:06:18,139 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 09:06:18,139 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1102513065] [2023-02-17 09:06:18,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 09:06:18,159 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 09:06:18,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 09:06:18,224 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 09:06:18,224 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 09:06:18,224 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1102513065] [2023-02-17 09:06:18,225 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1102513065] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 09:06:18,225 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 09:06:18,225 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-17 09:06:18,225 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [341767547] [2023-02-17 09:06:18,225 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 09:06:18,225 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-17 09:06:18,225 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 09:06:18,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-17 09:06:18,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-02-17 09:06:18,226 INFO L87 Difference]: Start difference. First operand 85 states and 115 transitions. Second operand has 5 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 09:06:18,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 09:06:18,287 INFO L93 Difference]: Finished difference Result 114 states and 152 transitions. [2023-02-17 09:06:18,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-17 09:06:18,288 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2023-02-17 09:06:18,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 09:06:18,289 INFO L225 Difference]: With dead ends: 114 [2023-02-17 09:06:18,289 INFO L226 Difference]: Without dead ends: 110 [2023-02-17 09:06:18,289 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-02-17 09:06:18,290 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 49 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-17 09:06:18,291 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 93 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-17 09:06:18,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2023-02-17 09:06:18,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 102. [2023-02-17 09:06:18,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 74 states have (on average 1.445945945945946) internal successors, (107), 83 states have internal predecessors, (107), 16 states have call successors, (16), 5 states have call predecessors, (16), 4 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2023-02-17 09:06:18,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 136 transitions. [2023-02-17 09:06:18,301 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 136 transitions. Word has length 9 [2023-02-17 09:06:18,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 09:06:18,301 INFO L495 AbstractCegarLoop]: Abstraction has 102 states and 136 transitions. [2023-02-17 09:06:18,301 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 09:06:18,301 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 136 transitions. [2023-02-17 09:06:18,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-02-17 09:06:18,302 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 09:06:18,302 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 09:06:18,302 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-02-17 09:06:18,302 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ackermannErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2023-02-17 09:06:18,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 09:06:18,303 INFO L85 PathProgramCache]: Analyzing trace with hash 1913955596, now seen corresponding path program 1 times [2023-02-17 09:06:18,303 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 09:06:18,303 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [934004138] [2023-02-17 09:06:18,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 09:06:18,303 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 09:06:18,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 09:06:18,348 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 09:06:18,348 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 09:06:18,348 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [934004138] [2023-02-17 09:06:18,348 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [934004138] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 09:06:18,349 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 09:06:18,349 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-17 09:06:18,349 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1264388387] [2023-02-17 09:06:18,349 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 09:06:18,349 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-17 09:06:18,349 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 09:06:18,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-17 09:06:18,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-02-17 09:06:18,350 INFO L87 Difference]: Start difference. First operand 102 states and 136 transitions. Second operand has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 09:06:18,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 09:06:18,381 INFO L93 Difference]: Finished difference Result 102 states and 136 transitions. [2023-02-17 09:06:18,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-02-17 09:06:18,382 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2023-02-17 09:06:18,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 09:06:18,382 INFO L225 Difference]: With dead ends: 102 [2023-02-17 09:06:18,383 INFO L226 Difference]: Without dead ends: 100 [2023-02-17 09:06:18,383 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-02-17 09:06:18,384 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 42 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-17 09:06:18,385 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 45 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-17 09:06:18,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2023-02-17 09:06:18,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 100. [2023-02-17 09:06:18,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 74 states have (on average 1.3108108108108107) internal successors, (97), 81 states have internal predecessors, (97), 16 states have call successors, (16), 5 states have call predecessors, (16), 4 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2023-02-17 09:06:18,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 126 transitions. [2023-02-17 09:06:18,393 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 126 transitions. Word has length 10 [2023-02-17 09:06:18,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 09:06:18,394 INFO L495 AbstractCegarLoop]: Abstraction has 100 states and 126 transitions. [2023-02-17 09:06:18,394 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 09:06:18,394 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 126 transitions. [2023-02-17 09:06:18,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-02-17 09:06:18,394 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 09:06:18,394 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 09:06:18,395 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-02-17 09:06:18,395 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2023-02-17 09:06:18,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 09:06:18,395 INFO L85 PathProgramCache]: Analyzing trace with hash 1669645175, now seen corresponding path program 1 times [2023-02-17 09:06:18,396 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 09:06:18,396 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [484223146] [2023-02-17 09:06:18,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 09:06:18,396 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 09:06:18,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 09:06:18,430 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 09:06:18,431 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 09:06:18,431 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [484223146] [2023-02-17 09:06:18,431 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [484223146] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 09:06:18,431 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 09:06:18,431 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-17 09:06:18,431 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [421223795] [2023-02-17 09:06:18,432 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 09:06:18,432 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-17 09:06:18,432 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 09:06:18,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-17 09:06:18,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-17 09:06:18,433 INFO L87 Difference]: Start difference. First operand 100 states and 126 transitions. Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 states have internal predecessors, (13), 1 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 09:06:18,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 09:06:18,461 INFO L93 Difference]: Finished difference Result 168 states and 221 transitions. [2023-02-17 09:06:18,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-17 09:06:18,461 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 states have internal predecessors, (13), 1 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2023-02-17 09:06:18,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 09:06:18,462 INFO L225 Difference]: With dead ends: 168 [2023-02-17 09:06:18,462 INFO L226 Difference]: Without dead ends: 97 [2023-02-17 09:06:18,463 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-02-17 09:06:18,464 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 26 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-17 09:06:18,464 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 88 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-17 09:06:18,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2023-02-17 09:06:18,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 96. [2023-02-17 09:06:18,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 71 states have (on average 1.295774647887324) internal successors, (92), 78 states have internal predecessors, (92), 15 states have call successors, (15), 5 states have call predecessors, (15), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2023-02-17 09:06:18,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 119 transitions. [2023-02-17 09:06:18,472 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 119 transitions. Word has length 15 [2023-02-17 09:06:18,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 09:06:18,473 INFO L495 AbstractCegarLoop]: Abstraction has 96 states and 119 transitions. [2023-02-17 09:06:18,473 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 states have internal predecessors, (13), 1 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 09:06:18,473 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 119 transitions. [2023-02-17 09:06:18,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-02-17 09:06:18,474 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 09:06:18,474 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 09:06:18,474 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-02-17 09:06:18,474 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ackermannErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2023-02-17 09:06:18,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 09:06:18,475 INFO L85 PathProgramCache]: Analyzing trace with hash 1669645399, now seen corresponding path program 1 times [2023-02-17 09:06:18,475 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 09:06:18,475 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1848687421] [2023-02-17 09:06:18,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 09:06:18,475 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 09:06:18,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 09:06:18,519 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 09:06:18,519 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 09:06:18,519 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1848687421] [2023-02-17 09:06:18,519 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1848687421] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 09:06:18,519 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1300765354] [2023-02-17 09:06:18,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 09:06:18,519 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 09:06:18,520 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 09:06:18,521 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-17 09:06:18,522 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-02-17 09:06:18,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 09:06:18,599 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 6 conjunts are in the unsatisfiable core [2023-02-17 09:06:18,602 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 09:06:18,652 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 09:06:18,653 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 09:06:18,693 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 09:06:18,694 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1300765354] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 09:06:18,694 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 09:06:18,694 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 11 [2023-02-17 09:06:18,694 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [334808400] [2023-02-17 09:06:18,694 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 09:06:18,695 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-02-17 09:06:18,695 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 09:06:18,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-02-17 09:06:18,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2023-02-17 09:06:18,696 INFO L87 Difference]: Start difference. First operand 96 states and 119 transitions. Second operand has 12 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 8 states have internal predecessors, (24), 4 states have call successors, (4), 4 states have call predecessors, (4), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 09:06:18,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 09:06:18,911 INFO L93 Difference]: Finished difference Result 274 states and 356 transitions. [2023-02-17 09:06:18,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-02-17 09:06:18,912 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 8 states have internal predecessors, (24), 4 states have call successors, (4), 4 states have call predecessors, (4), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2023-02-17 09:06:18,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 09:06:18,917 INFO L225 Difference]: With dead ends: 274 [2023-02-17 09:06:18,917 INFO L226 Difference]: Without dead ends: 272 [2023-02-17 09:06:18,923 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=104, Invalid=238, Unknown=0, NotChecked=0, Total=342 [2023-02-17 09:06:18,925 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 236 mSDsluCounter, 134 mSDsCounter, 0 mSdLazyCounter, 151 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 242 SdHoareTripleChecker+Valid, 163 SdHoareTripleChecker+Invalid, 242 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 151 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-17 09:06:18,927 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [242 Valid, 163 Invalid, 242 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 151 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-17 09:06:18,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2023-02-17 09:06:18,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 236. [2023-02-17 09:06:18,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 236 states, 182 states have (on average 1.2637362637362637) internal successors, (230), 189 states have internal predecessors, (230), 36 states have call successors, (36), 13 states have call predecessors, (36), 12 states have return successors, (33), 33 states have call predecessors, (33), 33 states have call successors, (33) [2023-02-17 09:06:18,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 299 transitions. [2023-02-17 09:06:18,971 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 299 transitions. Word has length 15 [2023-02-17 09:06:18,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 09:06:18,974 INFO L495 AbstractCegarLoop]: Abstraction has 236 states and 299 transitions. [2023-02-17 09:06:18,974 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 8 states have internal predecessors, (24), 4 states have call successors, (4), 4 states have call predecessors, (4), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 09:06:18,975 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 299 transitions. [2023-02-17 09:06:18,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-02-17 09:06:18,975 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 09:06:18,975 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 09:06:18,988 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-02-17 09:06:19,176 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-02-17 09:06:19,176 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2023-02-17 09:06:19,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 09:06:19,176 INFO L85 PathProgramCache]: Analyzing trace with hash 1422985811, now seen corresponding path program 1 times [2023-02-17 09:06:19,177 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 09:06:19,177 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1047181185] [2023-02-17 09:06:19,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 09:06:19,177 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 09:06:19,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 09:06:19,215 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 09:06:19,216 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 09:06:19,216 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1047181185] [2023-02-17 09:06:19,216 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1047181185] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 09:06:19,216 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [192956095] [2023-02-17 09:06:19,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 09:06:19,216 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 09:06:19,217 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 09:06:19,218 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-17 09:06:19,220 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-02-17 09:06:19,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 09:06:19,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjunts are in the unsatisfiable core [2023-02-17 09:06:19,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 09:06:19,274 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 09:06:19,274 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 09:06:19,308 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 09:06:19,309 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [192956095] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 09:06:19,309 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 09:06:19,309 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 11 [2023-02-17 09:06:19,309 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [731241003] [2023-02-17 09:06:19,309 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 09:06:19,310 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-02-17 09:06:19,310 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 09:06:19,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-02-17 09:06:19,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2023-02-17 09:06:19,310 INFO L87 Difference]: Start difference. First operand 236 states and 299 transitions. Second operand has 12 states, 10 states have (on average 2.6) internal successors, (26), 8 states have internal predecessors, (26), 4 states have call successors, (4), 4 states have call predecessors, (4), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 09:06:19,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 09:06:19,481 INFO L93 Difference]: Finished difference Result 512 states and 695 transitions. [2023-02-17 09:06:19,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-02-17 09:06:19,481 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 2.6) internal successors, (26), 8 states have internal predecessors, (26), 4 states have call successors, (4), 4 states have call predecessors, (4), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2023-02-17 09:06:19,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 09:06:19,484 INFO L225 Difference]: With dead ends: 512 [2023-02-17 09:06:19,484 INFO L226 Difference]: Without dead ends: 510 [2023-02-17 09:06:19,484 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 21 SyntacticMatches, 5 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=116, Invalid=264, Unknown=0, NotChecked=0, Total=380 [2023-02-17 09:06:19,485 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 164 mSDsluCounter, 150 mSDsCounter, 0 mSdLazyCounter, 192 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 167 SdHoareTripleChecker+Valid, 178 SdHoareTripleChecker+Invalid, 250 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 192 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-17 09:06:19,485 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [167 Valid, 178 Invalid, 250 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 192 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-17 09:06:19,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 510 states. [2023-02-17 09:06:19,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 510 to 445. [2023-02-17 09:06:19,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 445 states, 347 states have (on average 1.2276657060518732) internal successors, (426), 354 states have internal predecessors, (426), 69 states have call successors, (69), 24 states have call predecessors, (69), 23 states have return successors, (66), 66 states have call predecessors, (66), 66 states have call successors, (66) [2023-02-17 09:06:19,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 445 states to 445 states and 561 transitions. [2023-02-17 09:06:19,526 INFO L78 Accepts]: Start accepts. Automaton has 445 states and 561 transitions. Word has length 16 [2023-02-17 09:06:19,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 09:06:19,526 INFO L495 AbstractCegarLoop]: Abstraction has 445 states and 561 transitions. [2023-02-17 09:06:19,526 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 2.6) internal successors, (26), 8 states have internal predecessors, (26), 4 states have call successors, (4), 4 states have call predecessors, (4), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 09:06:19,526 INFO L276 IsEmpty]: Start isEmpty. Operand 445 states and 561 transitions. [2023-02-17 09:06:19,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-02-17 09:06:19,528 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 09:06:19,528 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 09:06:19,535 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-02-17 09:06:19,735 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2023-02-17 09:06:19,736 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2023-02-17 09:06:19,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 09:06:19,736 INFO L85 PathProgramCache]: Analyzing trace with hash 1106403678, now seen corresponding path program 1 times [2023-02-17 09:06:19,736 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 09:06:19,736 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1571765606] [2023-02-17 09:06:19,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 09:06:19,736 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 09:06:19,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 09:06:19,782 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-02-17 09:06:19,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 09:06:19,800 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-17 09:06:19,800 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 09:06:19,800 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1571765606] [2023-02-17 09:06:19,801 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1571765606] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 09:06:19,801 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1446499490] [2023-02-17 09:06:19,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 09:06:19,801 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 09:06:19,801 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 09:06:19,803 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-17 09:06:19,805 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-02-17 09:06:19,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 09:06:19,848 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 6 conjunts are in the unsatisfiable core [2023-02-17 09:06:19,848 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 09:06:19,873 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-17 09:06:19,873 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-17 09:06:19,873 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1446499490] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 09:06:19,874 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-02-17 09:06:19,874 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7] total 12 [2023-02-17 09:06:19,874 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1995146414] [2023-02-17 09:06:19,874 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 09:06:19,874 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-02-17 09:06:19,874 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 09:06:19,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-02-17 09:06:19,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2023-02-17 09:06:19,875 INFO L87 Difference]: Start difference. First operand 445 states and 561 transitions. Second operand has 7 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-17 09:06:19,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 09:06:19,952 INFO L93 Difference]: Finished difference Result 478 states and 600 transitions. [2023-02-17 09:06:19,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-02-17 09:06:19,952 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 24 [2023-02-17 09:06:19,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 09:06:19,954 INFO L225 Difference]: With dead ends: 478 [2023-02-17 09:06:19,954 INFO L226 Difference]: Without dead ends: 477 [2023-02-17 09:06:19,958 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2023-02-17 09:06:19,959 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 45 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-17 09:06:19,959 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 124 Invalid, 112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-17 09:06:19,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 477 states. [2023-02-17 09:06:19,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 477 to 444. [2023-02-17 09:06:19,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 444 states, 347 states have (on average 1.2161383285302594) internal successors, (422), 353 states have internal predecessors, (422), 69 states have call successors, (69), 24 states have call predecessors, (69), 23 states have return successors, (66), 66 states have call predecessors, (66), 66 states have call successors, (66) [2023-02-17 09:06:19,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 444 states to 444 states and 557 transitions. [2023-02-17 09:06:19,976 INFO L78 Accepts]: Start accepts. Automaton has 444 states and 557 transitions. Word has length 24 [2023-02-17 09:06:19,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 09:06:19,977 INFO L495 AbstractCegarLoop]: Abstraction has 444 states and 557 transitions. [2023-02-17 09:06:19,977 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-17 09:06:19,977 INFO L276 IsEmpty]: Start isEmpty. Operand 444 states and 557 transitions. [2023-02-17 09:06:19,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-02-17 09:06:19,978 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 09:06:19,978 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 09:06:19,984 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-02-17 09:06:20,182 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 09:06:20,183 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2023-02-17 09:06:20,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 09:06:20,183 INFO L85 PathProgramCache]: Analyzing trace with hash -61224288, now seen corresponding path program 1 times [2023-02-17 09:06:20,183 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 09:06:20,184 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [619271480] [2023-02-17 09:06:20,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 09:06:20,184 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 09:06:20,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 09:06:20,254 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-02-17 09:06:20,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 09:06:20,278 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-17 09:06:20,278 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 09:06:20,278 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [619271480] [2023-02-17 09:06:20,278 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [619271480] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 09:06:20,278 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [836657936] [2023-02-17 09:06:20,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 09:06:20,279 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 09:06:20,279 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 09:06:20,285 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-17 09:06:20,287 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-02-17 09:06:20,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 09:06:20,317 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 10 conjunts are in the unsatisfiable core [2023-02-17 09:06:20,320 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 09:06:20,361 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-17 09:06:20,362 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 09:06:20,451 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-17 09:06:20,452 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [836657936] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 09:06:20,452 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 09:06:20,452 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 19 [2023-02-17 09:06:20,452 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1826651916] [2023-02-17 09:06:20,452 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 09:06:20,453 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-02-17 09:06:20,453 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 09:06:20,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-02-17 09:06:20,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=299, Unknown=0, NotChecked=0, Total=342 [2023-02-17 09:06:20,455 INFO L87 Difference]: Start difference. First operand 444 states and 557 transitions. Second operand has 19 states, 17 states have (on average 3.235294117647059) internal successors, (55), 16 states have internal predecessors, (55), 8 states have call successors, (9), 4 states have call predecessors, (9), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-17 09:06:20,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 09:06:20,763 INFO L93 Difference]: Finished difference Result 1120 states and 1574 transitions. [2023-02-17 09:06:20,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-02-17 09:06:20,764 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 17 states have (on average 3.235294117647059) internal successors, (55), 16 states have internal predecessors, (55), 8 states have call successors, (9), 4 states have call predecessors, (9), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 25 [2023-02-17 09:06:20,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 09:06:20,767 INFO L225 Difference]: With dead ends: 1120 [2023-02-17 09:06:20,768 INFO L226 Difference]: Without dead ends: 780 [2023-02-17 09:06:20,770 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 42 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=218, Invalid=904, Unknown=0, NotChecked=0, Total=1122 [2023-02-17 09:06:20,772 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 254 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 473 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 254 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 566 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 473 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-17 09:06:20,772 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [254 Valid, 91 Invalid, 566 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 473 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-17 09:06:20,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 780 states. [2023-02-17 09:06:20,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 780 to 578. [2023-02-17 09:06:20,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 578 states, 449 states have (on average 1.2115812917594655) internal successors, (544), 468 states have internal predecessors, (544), 86 states have call successors, (86), 36 states have call predecessors, (86), 38 states have return successors, (90), 73 states have call predecessors, (90), 66 states have call successors, (90) [2023-02-17 09:06:20,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 578 states to 578 states and 720 transitions. [2023-02-17 09:06:20,803 INFO L78 Accepts]: Start accepts. Automaton has 578 states and 720 transitions. Word has length 25 [2023-02-17 09:06:20,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 09:06:20,804 INFO L495 AbstractCegarLoop]: Abstraction has 578 states and 720 transitions. [2023-02-17 09:06:20,804 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 17 states have (on average 3.235294117647059) internal successors, (55), 16 states have internal predecessors, (55), 8 states have call successors, (9), 4 states have call predecessors, (9), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-17 09:06:20,804 INFO L276 IsEmpty]: Start isEmpty. Operand 578 states and 720 transitions. [2023-02-17 09:06:20,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-02-17 09:06:20,805 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 09:06:20,805 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2023-02-17 09:06:20,820 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-02-17 09:06:21,010 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 09:06:21,010 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ackermannErr6ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2023-02-17 09:06:21,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 09:06:21,011 INFO L85 PathProgramCache]: Analyzing trace with hash -1846384600, now seen corresponding path program 1 times [2023-02-17 09:06:21,011 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 09:06:21,011 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2013376392] [2023-02-17 09:06:21,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 09:06:21,011 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 09:06:21,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 09:06:21,063 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 09:06:21,064 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 09:06:21,065 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2013376392] [2023-02-17 09:06:21,065 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2013376392] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 09:06:21,065 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1805106324] [2023-02-17 09:06:21,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 09:06:21,066 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 09:06:21,066 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 09:06:21,067 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-17 09:06:21,069 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-02-17 09:06:21,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 09:06:21,105 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 8 conjunts are in the unsatisfiable core [2023-02-17 09:06:21,106 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 09:06:21,130 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 09:06:21,131 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 09:06:21,169 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 09:06:21,169 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1805106324] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 09:06:21,169 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 09:06:21,169 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 15 [2023-02-17 09:06:21,169 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [804901335] [2023-02-17 09:06:21,169 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 09:06:21,171 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-02-17 09:06:21,171 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 09:06:21,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-02-17 09:06:21,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2023-02-17 09:06:21,172 INFO L87 Difference]: Start difference. First operand 578 states and 720 transitions. Second operand has 16 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 10 states have internal predecessors, (45), 6 states have call successors, (6), 6 states have call predecessors, (6), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 09:06:21,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 09:06:21,370 INFO L93 Difference]: Finished difference Result 1048 states and 1335 transitions. [2023-02-17 09:06:21,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-02-17 09:06:21,371 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 10 states have internal predecessors, (45), 6 states have call successors, (6), 6 states have call predecessors, (6), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2023-02-17 09:06:21,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 09:06:21,375 INFO L225 Difference]: With dead ends: 1048 [2023-02-17 09:06:21,375 INFO L226 Difference]: Without dead ends: 1047 [2023-02-17 09:06:21,376 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 42 SyntacticMatches, 4 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=214, Invalid=488, Unknown=0, NotChecked=0, Total=702 [2023-02-17 09:06:21,376 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 270 mSDsluCounter, 210 mSDsCounter, 0 mSdLazyCounter, 284 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 273 SdHoareTripleChecker+Valid, 248 SdHoareTripleChecker+Invalid, 361 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 284 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-17 09:06:21,376 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [273 Valid, 248 Invalid, 361 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 284 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-17 09:06:21,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1047 states. [2023-02-17 09:06:21,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1047 to 894. [2023-02-17 09:06:21,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 894 states, 697 states have (on average 1.1764705882352942) internal successors, (820), 728 states have internal predecessors, (820), 130 states have call successors, (130), 56 states have call predecessors, (130), 62 states have return successors, (138), 109 states have call predecessors, (138), 102 states have call successors, (138) [2023-02-17 09:06:21,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 894 states to 894 states and 1088 transitions. [2023-02-17 09:06:21,410 INFO L78 Accepts]: Start accepts. Automaton has 894 states and 1088 transitions. Word has length 27 [2023-02-17 09:06:21,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 09:06:21,411 INFO L495 AbstractCegarLoop]: Abstraction has 894 states and 1088 transitions. [2023-02-17 09:06:21,411 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 10 states have internal predecessors, (45), 6 states have call successors, (6), 6 states have call predecessors, (6), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 09:06:21,411 INFO L276 IsEmpty]: Start isEmpty. Operand 894 states and 1088 transitions. [2023-02-17 09:06:21,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-02-17 09:06:21,412 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 09:06:21,412 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 09:06:21,423 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-02-17 09:06:21,617 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-02-17 09:06:21,617 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ackermannErr6ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2023-02-17 09:06:21,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 09:06:21,618 INFO L85 PathProgramCache]: Analyzing trace with hash 1298021223, now seen corresponding path program 1 times [2023-02-17 09:06:21,618 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 09:06:21,618 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [602557763] [2023-02-17 09:06:21,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 09:06:21,618 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 09:06:21,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 09:06:21,651 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-02-17 09:06:21,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 09:06:21,685 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-02-17 09:06:21,685 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 09:06:21,685 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [602557763] [2023-02-17 09:06:21,685 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [602557763] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 09:06:21,685 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [71989234] [2023-02-17 09:06:21,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 09:06:21,686 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 09:06:21,686 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 09:06:21,687 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-17 09:06:21,689 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-02-17 09:06:21,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 09:06:21,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 10 conjunts are in the unsatisfiable core [2023-02-17 09:06:21,718 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 09:06:21,731 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-02-17 09:06:21,731 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 09:06:21,775 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-02-17 09:06:21,775 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [71989234] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 09:06:21,776 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 09:06:21,776 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2023-02-17 09:06:21,776 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [474913432] [2023-02-17 09:06:21,776 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 09:06:21,776 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-02-17 09:06:21,776 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 09:06:21,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-02-17 09:06:21,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2023-02-17 09:06:21,777 INFO L87 Difference]: Start difference. First operand 894 states and 1088 transitions. Second operand has 15 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 13 states have internal predecessors, (37), 6 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-17 09:06:21,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 09:06:21,953 INFO L93 Difference]: Finished difference Result 1014 states and 1281 transitions. [2023-02-17 09:06:21,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-02-17 09:06:21,954 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 13 states have internal predecessors, (37), 6 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 27 [2023-02-17 09:06:21,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 09:06:21,957 INFO L225 Difference]: With dead ends: 1014 [2023-02-17 09:06:21,957 INFO L226 Difference]: Without dead ends: 1013 [2023-02-17 09:06:21,958 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 46 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=110, Invalid=352, Unknown=0, NotChecked=0, Total=462 [2023-02-17 09:06:21,958 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 134 mSDsluCounter, 111 mSDsCounter, 0 mSdLazyCounter, 180 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 131 SdHoareTripleChecker+Invalid, 236 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 180 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-17 09:06:21,959 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [134 Valid, 131 Invalid, 236 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 180 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-17 09:06:21,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1013 states. [2023-02-17 09:06:21,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1013 to 932. [2023-02-17 09:06:21,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 932 states, 730 states have (on average 1.1767123287671233) internal successors, (859), 757 states have internal predecessors, (859), 135 states have call successors, (135), 61 states have call predecessors, (135), 62 states have return successors, (138), 113 states have call predecessors, (138), 102 states have call successors, (138) [2023-02-17 09:06:21,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 932 states to 932 states and 1132 transitions. [2023-02-17 09:06:21,990 INFO L78 Accepts]: Start accepts. Automaton has 932 states and 1132 transitions. Word has length 27 [2023-02-17 09:06:21,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 09:06:21,990 INFO L495 AbstractCegarLoop]: Abstraction has 932 states and 1132 transitions. [2023-02-17 09:06:21,990 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 13 states have internal predecessors, (37), 6 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-17 09:06:21,990 INFO L276 IsEmpty]: Start isEmpty. Operand 932 states and 1132 transitions. [2023-02-17 09:06:21,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2023-02-17 09:06:21,991 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 09:06:21,991 INFO L195 NwaCegarLoop]: trace histogram [4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 09:06:21,997 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-02-17 09:06:22,196 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 09:06:22,196 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2023-02-17 09:06:22,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 09:06:22,197 INFO L85 PathProgramCache]: Analyzing trace with hash -722353775, now seen corresponding path program 1 times [2023-02-17 09:06:22,197 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 09:06:22,197 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [171940933] [2023-02-17 09:06:22,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 09:06:22,197 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 09:06:22,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 09:06:22,226 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-02-17 09:06:22,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 09:06:22,240 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-02-17 09:06:22,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 09:06:22,256 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-02-17 09:06:22,256 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 09:06:22,256 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [171940933] [2023-02-17 09:06:22,257 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [171940933] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 09:06:22,257 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1035699046] [2023-02-17 09:06:22,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 09:06:22,257 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 09:06:22,257 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 09:06:22,258 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-17 09:06:22,260 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-02-17 09:06:22,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 09:06:22,289 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 9 conjunts are in the unsatisfiable core [2023-02-17 09:06:22,290 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 09:06:22,310 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-02-17 09:06:22,310 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 09:06:22,376 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-02-17 09:06:22,376 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1035699046] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 09:06:22,376 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 09:06:22,376 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2023-02-17 09:06:22,377 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [354566233] [2023-02-17 09:06:22,377 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 09:06:22,377 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-02-17 09:06:22,377 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 09:06:22,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-02-17 09:06:22,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2023-02-17 09:06:22,378 INFO L87 Difference]: Start difference. First operand 932 states and 1132 transitions. Second operand has 18 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 14 states have internal predecessors, (43), 3 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (5), 4 states have call predecessors, (5), 1 states have call successors, (5) [2023-02-17 09:06:22,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 09:06:22,696 INFO L93 Difference]: Finished difference Result 1421 states and 2074 transitions. [2023-02-17 09:06:22,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-02-17 09:06:22,697 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 14 states have internal predecessors, (43), 3 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (5), 4 states have call predecessors, (5), 1 states have call successors, (5) Word has length 34 [2023-02-17 09:06:22,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 09:06:22,702 INFO L225 Difference]: With dead ends: 1421 [2023-02-17 09:06:22,702 INFO L226 Difference]: Without dead ends: 1419 [2023-02-17 09:06:22,703 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 [2023-02-17 09:06:22,703 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 171 mSDsluCounter, 151 mSDsCounter, 0 mSdLazyCounter, 312 mSolverCounterSat, 165 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 171 SdHoareTripleChecker+Valid, 177 SdHoareTripleChecker+Invalid, 477 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 165 IncrementalHoareTripleChecker+Valid, 312 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-17 09:06:22,704 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [171 Valid, 177 Invalid, 477 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [165 Valid, 312 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-17 09:06:22,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1419 states. [2023-02-17 09:06:22,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1419 to 1226. [2023-02-17 09:06:22,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1226 states, 922 states have (on average 1.1637744034707158) internal successors, (1073), 960 states have internal predecessors, (1073), 192 states have call successors, (192), 68 states have call predecessors, (192), 107 states have return successors, (366), 197 states have call predecessors, (366), 158 states have call successors, (366) [2023-02-17 09:06:22,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1226 states to 1226 states and 1631 transitions. [2023-02-17 09:06:22,758 INFO L78 Accepts]: Start accepts. Automaton has 1226 states and 1631 transitions. Word has length 34 [2023-02-17 09:06:22,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 09:06:22,758 INFO L495 AbstractCegarLoop]: Abstraction has 1226 states and 1631 transitions. [2023-02-17 09:06:22,758 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 14 states have internal predecessors, (43), 3 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (5), 4 states have call predecessors, (5), 1 states have call successors, (5) [2023-02-17 09:06:22,758 INFO L276 IsEmpty]: Start isEmpty. Operand 1226 states and 1631 transitions. [2023-02-17 09:06:22,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2023-02-17 09:06:22,759 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 09:06:22,759 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 09:06:22,765 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-02-17 09:06:22,964 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 09:06:22,965 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ackermannErr6ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2023-02-17 09:06:22,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 09:06:22,966 INFO L85 PathProgramCache]: Analyzing trace with hash 1607744024, now seen corresponding path program 1 times [2023-02-17 09:06:22,966 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 09:06:22,966 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [272085413] [2023-02-17 09:06:22,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 09:06:22,966 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 09:06:22,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 09:06:22,993 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-02-17 09:06:22,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 09:06:23,007 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-02-17 09:06:23,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 09:06:23,022 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 14 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-02-17 09:06:23,023 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 09:06:23,023 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [272085413] [2023-02-17 09:06:23,023 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [272085413] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 09:06:23,023 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1112840542] [2023-02-17 09:06:23,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 09:06:23,023 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 09:06:23,024 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 09:06:23,024 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-17 09:06:23,027 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-02-17 09:06:23,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 09:06:23,060 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 9 conjunts are in the unsatisfiable core [2023-02-17 09:06:23,061 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 09:06:23,088 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 12 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-02-17 09:06:23,088 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 09:06:23,158 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-02-17 09:06:23,158 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1112840542] provided 1 perfect and 1 imperfect interpolant sequences [2023-02-17 09:06:23,158 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-02-17 09:06:23,158 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8, 8] total 17 [2023-02-17 09:06:23,158 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1831907272] [2023-02-17 09:06:23,159 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 09:06:23,159 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-02-17 09:06:23,159 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 09:06:23,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-02-17 09:06:23,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2023-02-17 09:06:23,160 INFO L87 Difference]: Start difference. First operand 1226 states and 1631 transitions. Second operand has 9 states, 8 states have (on average 3.5) internal successors, (28), 7 states have internal predecessors, (28), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-17 09:06:23,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 09:06:23,338 INFO L93 Difference]: Finished difference Result 1333 states and 1854 transitions. [2023-02-17 09:06:23,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-02-17 09:06:23,339 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 3.5) internal successors, (28), 7 states have internal predecessors, (28), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 36 [2023-02-17 09:06:23,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 09:06:23,344 INFO L225 Difference]: With dead ends: 1333 [2023-02-17 09:06:23,344 INFO L226 Difference]: Without dead ends: 1332 [2023-02-17 09:06:23,346 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 60 SyntacticMatches, 6 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=100, Invalid=550, Unknown=0, NotChecked=0, Total=650 [2023-02-17 09:06:23,347 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 70 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 166 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 209 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 166 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-17 09:06:23,348 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [76 Valid, 134 Invalid, 209 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 166 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-17 09:06:23,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1332 states. [2023-02-17 09:06:23,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1332 to 1234. [2023-02-17 09:06:23,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1234 states, 930 states have (on average 1.1591397849462366) internal successors, (1078), 964 states have internal predecessors, (1078), 196 states have call successors, (196), 68 states have call predecessors, (196), 103 states have return successors, (290), 201 states have call predecessors, (290), 162 states have call successors, (290) [2023-02-17 09:06:23,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1234 states to 1234 states and 1564 transitions. [2023-02-17 09:06:23,414 INFO L78 Accepts]: Start accepts. Automaton has 1234 states and 1564 transitions. Word has length 36 [2023-02-17 09:06:23,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 09:06:23,415 INFO L495 AbstractCegarLoop]: Abstraction has 1234 states and 1564 transitions. [2023-02-17 09:06:23,415 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 3.5) internal successors, (28), 7 states have internal predecessors, (28), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-17 09:06:23,415 INFO L276 IsEmpty]: Start isEmpty. Operand 1234 states and 1564 transitions. [2023-02-17 09:06:23,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-02-17 09:06:23,417 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 09:06:23,417 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 09:06:23,424 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-02-17 09:06:23,624 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-02-17 09:06:23,624 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ackermannErr6ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2023-02-17 09:06:23,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 09:06:23,625 INFO L85 PathProgramCache]: Analyzing trace with hash -1310665197, now seen corresponding path program 2 times [2023-02-17 09:06:23,625 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 09:06:23,625 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1643851842] [2023-02-17 09:06:23,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 09:06:23,625 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 09:06:23,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 09:06:23,681 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2023-02-17 09:06:23,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 09:06:23,700 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 2 proven. 40 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-02-17 09:06:23,700 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 09:06:23,700 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1643851842] [2023-02-17 09:06:23,701 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1643851842] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 09:06:23,701 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1361516518] [2023-02-17 09:06:23,701 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-17 09:06:23,701 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 09:06:23,701 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 09:06:23,705 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-17 09:06:23,707 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-02-17 09:06:23,738 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-17 09:06:23,738 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-17 09:06:23,739 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 14 conjunts are in the unsatisfiable core [2023-02-17 09:06:23,740 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 09:06:23,778 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 2 proven. 40 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-02-17 09:06:23,778 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 09:06:23,875 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 4 proven. 38 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-02-17 09:06:23,876 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1361516518] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 09:06:23,876 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 09:06:23,876 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 22 [2023-02-17 09:06:23,876 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [683360311] [2023-02-17 09:06:23,876 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 09:06:23,876 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-02-17 09:06:23,877 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 09:06:23,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-02-17 09:06:23,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2023-02-17 09:06:23,877 INFO L87 Difference]: Start difference. First operand 1234 states and 1564 transitions. Second operand has 23 states, 20 states have (on average 3.05) internal successors, (61), 17 states have internal predecessors, (61), 8 states have call successors, (10), 7 states have call predecessors, (10), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-17 09:06:24,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 09:06:24,197 INFO L93 Difference]: Finished difference Result 1514 states and 1957 transitions. [2023-02-17 09:06:24,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-02-17 09:06:24,198 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 20 states have (on average 3.05) internal successors, (61), 17 states have internal predecessors, (61), 8 states have call successors, (10), 7 states have call predecessors, (10), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 43 [2023-02-17 09:06:24,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 09:06:24,203 INFO L225 Difference]: With dead ends: 1514 [2023-02-17 09:06:24,203 INFO L226 Difference]: Without dead ends: 1513 [2023-02-17 09:06:24,204 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 69 SyntacticMatches, 8 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 318 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=420, Invalid=1302, Unknown=0, NotChecked=0, Total=1722 [2023-02-17 09:06:24,205 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 382 mSDsluCounter, 187 mSDsCounter, 0 mSdLazyCounter, 329 mSolverCounterSat, 136 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 382 SdHoareTripleChecker+Valid, 207 SdHoareTripleChecker+Invalid, 465 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 136 IncrementalHoareTripleChecker+Valid, 329 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-17 09:06:24,205 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [382 Valid, 207 Invalid, 465 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [136 Valid, 329 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-17 09:06:24,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1513 states. [2023-02-17 09:06:24,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1513 to 1270. [2023-02-17 09:06:24,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1270 states, 959 states have (on average 1.159541188738269) internal successors, (1112), 992 states have internal predecessors, (1112), 203 states have call successors, (203), 72 states have call predecessors, (203), 103 states have return successors, (290), 205 states have call predecessors, (290), 162 states have call successors, (290) [2023-02-17 09:06:24,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1270 states to 1270 states and 1605 transitions. [2023-02-17 09:06:24,267 INFO L78 Accepts]: Start accepts. Automaton has 1270 states and 1605 transitions. Word has length 43 [2023-02-17 09:06:24,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 09:06:24,268 INFO L495 AbstractCegarLoop]: Abstraction has 1270 states and 1605 transitions. [2023-02-17 09:06:24,268 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 20 states have (on average 3.05) internal successors, (61), 17 states have internal predecessors, (61), 8 states have call successors, (10), 7 states have call predecessors, (10), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-17 09:06:24,268 INFO L276 IsEmpty]: Start isEmpty. Operand 1270 states and 1605 transitions. [2023-02-17 09:06:24,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2023-02-17 09:06:24,269 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 09:06:24,269 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 09:06:24,279 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-02-17 09:06:24,473 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-02-17 09:06:24,474 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ackermannErr6ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2023-02-17 09:06:24,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 09:06:24,474 INFO L85 PathProgramCache]: Analyzing trace with hash -1058043410, now seen corresponding path program 2 times [2023-02-17 09:06:24,474 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 09:06:24,474 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [208736604] [2023-02-17 09:06:24,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 09:06:24,474 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 09:06:24,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 09:06:24,514 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-02-17 09:06:24,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 09:06:24,528 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-02-17 09:06:24,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 09:06:24,544 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 26 proven. 8 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-02-17 09:06:24,544 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 09:06:24,544 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [208736604] [2023-02-17 09:06:24,544 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [208736604] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 09:06:24,544 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1657344861] [2023-02-17 09:06:24,545 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-17 09:06:24,545 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 09:06:24,545 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 09:06:24,546 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-17 09:06:24,548 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-02-17 09:06:24,574 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-17 09:06:24,574 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-17 09:06:24,575 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 11 conjunts are in the unsatisfiable core [2023-02-17 09:06:24,576 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 09:06:24,610 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 24 proven. 10 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-02-17 09:06:24,610 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 09:06:24,685 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 28 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-02-17 09:06:24,685 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1657344861] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 09:06:24,685 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 09:06:24,685 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 21 [2023-02-17 09:06:24,685 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [903906683] [2023-02-17 09:06:24,685 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 09:06:24,686 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-02-17 09:06:24,686 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 09:06:24,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-02-17 09:06:24,686 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2023-02-17 09:06:24,686 INFO L87 Difference]: Start difference. First operand 1270 states and 1605 transitions. Second operand has 22 states, 21 states have (on average 2.9047619047619047) internal successors, (61), 16 states have internal predecessors, (61), 5 states have call successors, (7), 5 states have call predecessors, (7), 5 states have return successors, (5), 4 states have call predecessors, (5), 1 states have call successors, (5) [2023-02-17 09:06:25,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 09:06:25,324 INFO L93 Difference]: Finished difference Result 2781 states and 4049 transitions. [2023-02-17 09:06:25,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-02-17 09:06:25,325 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 2.9047619047619047) internal successors, (61), 16 states have internal predecessors, (61), 5 states have call successors, (7), 5 states have call predecessors, (7), 5 states have return successors, (5), 4 states have call predecessors, (5), 1 states have call successors, (5) Word has length 44 [2023-02-17 09:06:25,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 09:06:25,332 INFO L225 Difference]: With dead ends: 2781 [2023-02-17 09:06:25,332 INFO L226 Difference]: Without dead ends: 1922 [2023-02-17 09:06:25,337 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 78 SyntacticMatches, 8 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 499 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=582, Invalid=1968, Unknown=0, NotChecked=0, Total=2550 [2023-02-17 09:06:25,337 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 289 mSDsluCounter, 203 mSDsCounter, 0 mSdLazyCounter, 499 mSolverCounterSat, 375 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 289 SdHoareTripleChecker+Valid, 239 SdHoareTripleChecker+Invalid, 874 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 375 IncrementalHoareTripleChecker+Valid, 499 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-17 09:06:25,338 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [289 Valid, 239 Invalid, 874 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [375 Valid, 499 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-17 09:06:25,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1922 states. [2023-02-17 09:06:25,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1922 to 1449. [2023-02-17 09:06:25,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1449 states, 1096 states have (on average 1.1496350364963503) internal successors, (1260), 1135 states have internal predecessors, (1260), 227 states have call successors, (227), 86 states have call predecessors, (227), 121 states have return successors, (328), 227 states have call predecessors, (328), 181 states have call successors, (328) [2023-02-17 09:06:25,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1449 states to 1449 states and 1815 transitions. [2023-02-17 09:06:25,397 INFO L78 Accepts]: Start accepts. Automaton has 1449 states and 1815 transitions. Word has length 44 [2023-02-17 09:06:25,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 09:06:25,397 INFO L495 AbstractCegarLoop]: Abstraction has 1449 states and 1815 transitions. [2023-02-17 09:06:25,398 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 2.9047619047619047) internal successors, (61), 16 states have internal predecessors, (61), 5 states have call successors, (7), 5 states have call predecessors, (7), 5 states have return successors, (5), 4 states have call predecessors, (5), 1 states have call successors, (5) [2023-02-17 09:06:25,398 INFO L276 IsEmpty]: Start isEmpty. Operand 1449 states and 1815 transitions. [2023-02-17 09:06:25,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2023-02-17 09:06:25,399 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 09:06:25,399 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 09:06:25,406 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2023-02-17 09:06:25,604 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-02-17 09:06:25,604 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ackermannErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2023-02-17 09:06:25,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 09:06:25,604 INFO L85 PathProgramCache]: Analyzing trace with hash 407823314, now seen corresponding path program 1 times [2023-02-17 09:06:25,604 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 09:06:25,604 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1431862282] [2023-02-17 09:06:25,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 09:06:25,604 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 09:06:25,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 09:06:25,649 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2023-02-17 09:06:25,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 09:06:25,659 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 38 proven. 5 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-02-17 09:06:25,659 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 09:06:25,659 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1431862282] [2023-02-17 09:06:25,659 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1431862282] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 09:06:25,659 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [731744972] [2023-02-17 09:06:25,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 09:06:25,660 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 09:06:25,660 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 09:06:25,661 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-17 09:06:25,679 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-02-17 09:06:25,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 09:06:25,697 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 9 conjunts are in the unsatisfiable core [2023-02-17 09:06:25,698 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 09:06:25,736 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 52 proven. 3 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-02-17 09:06:25,736 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 09:06:25,791 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 53 proven. 2 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-02-17 09:06:25,791 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [731744972] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 09:06:25,791 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 09:06:25,792 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 16 [2023-02-17 09:06:25,792 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [79006560] [2023-02-17 09:06:25,792 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 09:06:25,792 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-02-17 09:06:25,792 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 09:06:25,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-02-17 09:06:25,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2023-02-17 09:06:25,793 INFO L87 Difference]: Start difference. First operand 1449 states and 1815 transitions. Second operand has 16 states, 16 states have (on average 3.375) internal successors, (54), 13 states have internal predecessors, (54), 6 states have call successors, (9), 5 states have call predecessors, (9), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-02-17 09:06:26,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 09:06:26,138 INFO L93 Difference]: Finished difference Result 1875 states and 2461 transitions. [2023-02-17 09:06:26,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-02-17 09:06:26,139 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.375) internal successors, (54), 13 states have internal predecessors, (54), 6 states have call successors, (9), 5 states have call predecessors, (9), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 51 [2023-02-17 09:06:26,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 09:06:26,145 INFO L225 Difference]: With dead ends: 1875 [2023-02-17 09:06:26,145 INFO L226 Difference]: Without dead ends: 1807 [2023-02-17 09:06:26,146 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 89 SyntacticMatches, 7 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 246 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=334, Invalid=926, Unknown=0, NotChecked=0, Total=1260 [2023-02-17 09:06:26,146 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 204 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 427 mSolverCounterSat, 159 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 204 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 586 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 159 IncrementalHoareTripleChecker+Valid, 427 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-17 09:06:26,147 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [204 Valid, 71 Invalid, 586 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [159 Valid, 427 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-17 09:06:26,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1807 states. [2023-02-17 09:06:26,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1807 to 1391. [2023-02-17 09:06:26,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1391 states, 1050 states have (on average 1.140952380952381) internal successors, (1198), 1093 states have internal predecessors, (1198), 216 states have call successors, (216), 79 states have call predecessors, (216), 121 states have return successors, (328), 218 states have call predecessors, (328), 181 states have call successors, (328) [2023-02-17 09:06:26,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1391 states to 1391 states and 1742 transitions. [2023-02-17 09:06:26,223 INFO L78 Accepts]: Start accepts. Automaton has 1391 states and 1742 transitions. Word has length 51 [2023-02-17 09:06:26,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 09:06:26,223 INFO L495 AbstractCegarLoop]: Abstraction has 1391 states and 1742 transitions. [2023-02-17 09:06:26,223 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.375) internal successors, (54), 13 states have internal predecessors, (54), 6 states have call successors, (9), 5 states have call predecessors, (9), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-02-17 09:06:26,223 INFO L276 IsEmpty]: Start isEmpty. Operand 1391 states and 1742 transitions. [2023-02-17 09:06:26,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2023-02-17 09:06:26,225 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 09:06:26,225 INFO L195 NwaCegarLoop]: trace histogram [6, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 09:06:26,231 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2023-02-17 09:06:26,429 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-02-17 09:06:26,430 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2023-02-17 09:06:26,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 09:06:26,430 INFO L85 PathProgramCache]: Analyzing trace with hash 843839239, now seen corresponding path program 1 times [2023-02-17 09:06:26,430 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 09:06:26,430 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [825496716] [2023-02-17 09:06:26,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 09:06:26,430 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 09:06:26,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 09:06:26,498 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-02-17 09:06:26,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 09:06:26,526 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-02-17 09:06:26,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 09:06:26,541 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-02-17 09:06:26,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 09:06:26,558 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2023-02-17 09:06:26,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 09:06:26,578 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 21 proven. 16 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-02-17 09:06:26,579 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 09:06:26,579 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [825496716] [2023-02-17 09:06:26,579 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [825496716] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 09:06:26,579 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1126427311] [2023-02-17 09:06:26,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 09:06:26,579 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 09:06:26,579 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 09:06:26,585 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-17 09:06:26,608 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-02-17 09:06:26,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 09:06:26,629 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 15 conjunts are in the unsatisfiable core [2023-02-17 09:06:26,631 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 09:06:26,672 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 14 proven. 18 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2023-02-17 09:06:26,672 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 09:06:26,821 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 18 proven. 19 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-02-17 09:06:26,822 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1126427311] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 09:06:26,822 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 09:06:26,822 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 13] total 26 [2023-02-17 09:06:26,822 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1809515188] [2023-02-17 09:06:26,822 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 09:06:26,823 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-02-17 09:06:26,823 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 09:06:26,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-02-17 09:06:26,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=614, Unknown=0, NotChecked=0, Total=702 [2023-02-17 09:06:26,823 INFO L87 Difference]: Start difference. First operand 1391 states and 1742 transitions. Second operand has 27 states, 26 states have (on average 2.230769230769231) internal successors, (58), 21 states have internal predecessors, (58), 5 states have call successors, (7), 3 states have call predecessors, (7), 8 states have return successors, (9), 8 states have call predecessors, (9), 3 states have call successors, (9) [2023-02-17 09:06:27,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 09:06:27,681 INFO L93 Difference]: Finished difference Result 3378 states and 5999 transitions. [2023-02-17 09:06:27,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2023-02-17 09:06:27,682 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 2.230769230769231) internal successors, (58), 21 states have internal predecessors, (58), 5 states have call successors, (7), 3 states have call predecessors, (7), 8 states have return successors, (9), 8 states have call predecessors, (9), 3 states have call successors, (9) Word has length 53 [2023-02-17 09:06:27,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 09:06:27,697 INFO L225 Difference]: With dead ends: 3378 [2023-02-17 09:06:27,697 INFO L226 Difference]: Without dead ends: 3376 [2023-02-17 09:06:27,700 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 95 SyntacticMatches, 6 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1696 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1154, Invalid=5008, Unknown=0, NotChecked=0, Total=6162 [2023-02-17 09:06:27,701 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 178 mSDsluCounter, 227 mSDsCounter, 0 mSdLazyCounter, 788 mSolverCounterSat, 432 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 191 SdHoareTripleChecker+Valid, 252 SdHoareTripleChecker+Invalid, 1220 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 432 IncrementalHoareTripleChecker+Valid, 788 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-02-17 09:06:27,701 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [191 Valid, 252 Invalid, 1220 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [432 Valid, 788 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-02-17 09:06:27,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3376 states. [2023-02-17 09:06:27,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3376 to 2468. [2023-02-17 09:06:27,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2468 states, 1732 states have (on average 1.1096997690531178) internal successors, (1922), 1778 states have internal predecessors, (1922), 433 states have call successors, (433), 93 states have call predecessors, (433), 299 states have return successors, (2469), 596 states have call predecessors, (2469), 396 states have call successors, (2469) [2023-02-17 09:06:27,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2468 states to 2468 states and 4824 transitions. [2023-02-17 09:06:27,866 INFO L78 Accepts]: Start accepts. Automaton has 2468 states and 4824 transitions. Word has length 53 [2023-02-17 09:06:27,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 09:06:27,867 INFO L495 AbstractCegarLoop]: Abstraction has 2468 states and 4824 transitions. [2023-02-17 09:06:27,867 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 2.230769230769231) internal successors, (58), 21 states have internal predecessors, (58), 5 states have call successors, (7), 3 states have call predecessors, (7), 8 states have return successors, (9), 8 states have call predecessors, (9), 3 states have call successors, (9) [2023-02-17 09:06:27,867 INFO L276 IsEmpty]: Start isEmpty. Operand 2468 states and 4824 transitions. [2023-02-17 09:06:27,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2023-02-17 09:06:27,869 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 09:06:27,869 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1] [2023-02-17 09:06:27,876 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-02-17 09:06:28,074 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-02-17 09:06:28,075 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ackermannErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2023-02-17 09:06:28,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 09:06:28,076 INFO L85 PathProgramCache]: Analyzing trace with hash 2013961680, now seen corresponding path program 1 times [2023-02-17 09:06:28,076 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 09:06:28,076 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1122122594] [2023-02-17 09:06:28,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 09:06:28,076 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 09:06:28,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 09:06:28,172 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 111 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-02-17 09:06:28,173 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 09:06:28,173 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1122122594] [2023-02-17 09:06:28,173 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1122122594] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 09:06:28,173 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [740395125] [2023-02-17 09:06:28,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 09:06:28,173 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 09:06:28,173 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 09:06:28,174 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-17 09:06:28,176 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-02-17 09:06:28,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 09:06:28,215 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 18 conjunts are in the unsatisfiable core [2023-02-17 09:06:28,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 09:06:28,272 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 111 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-02-17 09:06:28,273 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 09:06:28,378 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 111 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-02-17 09:06:28,378 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [740395125] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 09:06:28,378 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 09:06:28,378 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 23 [2023-02-17 09:06:28,378 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [562954354] [2023-02-17 09:06:28,378 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 09:06:28,379 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-02-17 09:06:28,379 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 09:06:28,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-02-17 09:06:28,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=416, Unknown=0, NotChecked=0, Total=552 [2023-02-17 09:06:28,380 INFO L87 Difference]: Start difference. First operand 2468 states and 4824 transitions. Second operand has 24 states, 23 states have (on average 3.652173913043478) internal successors, (84), 14 states have internal predecessors, (84), 10 states have call successors, (16), 10 states have call predecessors, (16), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 09:06:29,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 09:06:29,051 INFO L93 Difference]: Finished difference Result 7290 states and 13932 transitions. [2023-02-17 09:06:29,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2023-02-17 09:06:29,052 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 3.652173913043478) internal successors, (84), 14 states have internal predecessors, (84), 10 states have call successors, (16), 10 states have call predecessors, (16), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2023-02-17 09:06:29,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 09:06:29,102 INFO L225 Difference]: With dead ends: 7290 [2023-02-17 09:06:29,103 INFO L226 Difference]: Without dead ends: 7289 [2023-02-17 09:06:29,107 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 [2023-02-17 09:06:29,108 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 721 mSDsluCounter, 275 mSDsCounter, 0 mSdLazyCounter, 370 mSolverCounterSat, 330 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 727 SdHoareTripleChecker+Valid, 304 SdHoareTripleChecker+Invalid, 700 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 330 IncrementalHoareTripleChecker+Valid, 370 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-17 09:06:29,109 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [727 Valid, 304 Invalid, 700 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [330 Valid, 370 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-17 09:06:29,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7289 states. [2023-02-17 09:06:29,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7289 to 6716. [2023-02-17 09:06:29,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6716 states, 4744 states have (on average 1.110876897133221) internal successors, (5270), 4850 states have internal predecessors, (5270), 1177 states have call successors, (1177), 273 states have call predecessors, (1177), 791 states have return successors, (6567), 1592 states have call predecessors, (6567), 1050 states have call successors, (6567) [2023-02-17 09:06:29,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6716 states to 6716 states and 13014 transitions. [2023-02-17 09:06:29,569 INFO L78 Accepts]: Start accepts. Automaton has 6716 states and 13014 transitions. Word has length 57 [2023-02-17 09:06:29,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 09:06:29,569 INFO L495 AbstractCegarLoop]: Abstraction has 6716 states and 13014 transitions. [2023-02-17 09:06:29,570 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 3.652173913043478) internal successors, (84), 14 states have internal predecessors, (84), 10 states have call successors, (16), 10 states have call predecessors, (16), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 09:06:29,570 INFO L276 IsEmpty]: Start isEmpty. Operand 6716 states and 13014 transitions. [2023-02-17 09:06:29,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2023-02-17 09:06:29,571 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 09:06:29,572 INFO L195 NwaCegarLoop]: trace histogram [6, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 09:06:29,580 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-02-17 09:06:29,776 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-02-17 09:06:29,777 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ackermannErr6ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2023-02-17 09:06:29,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 09:06:29,777 INFO L85 PathProgramCache]: Analyzing trace with hash -814290418, now seen corresponding path program 1 times [2023-02-17 09:06:29,777 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 09:06:29,777 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1346960993] [2023-02-17 09:06:29,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 09:06:29,778 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 09:06:29,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 09:06:29,868 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-02-17 09:06:29,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 09:06:29,903 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-02-17 09:06:29,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 09:06:29,928 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-02-17 09:06:29,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 09:06:29,950 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2023-02-17 09:06:29,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 09:06:29,972 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 36 proven. 6 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-02-17 09:06:29,972 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 09:06:29,972 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1346960993] [2023-02-17 09:06:29,972 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1346960993] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 09:06:29,972 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2085298281] [2023-02-17 09:06:29,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 09:06:29,972 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 09:06:29,972 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 09:06:29,973 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-17 09:06:29,976 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-02-17 09:06:30,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 09:06:30,016 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 15 conjunts are in the unsatisfiable core [2023-02-17 09:06:30,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 09:06:30,050 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 27 proven. 10 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2023-02-17 09:06:30,050 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 09:06:30,196 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 40 proven. 2 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-02-17 09:06:30,197 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2085298281] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 09:06:30,197 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 09:06:30,197 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 13] total 26 [2023-02-17 09:06:30,197 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1958438787] [2023-02-17 09:06:30,197 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 09:06:30,197 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-02-17 09:06:30,197 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 09:06:30,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-02-17 09:06:30,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=608, Unknown=0, NotChecked=0, Total=702 [2023-02-17 09:06:30,198 INFO L87 Difference]: Start difference. First operand 6716 states and 13014 transitions. Second operand has 27 states, 26 states have (on average 2.3846153846153846) internal successors, (62), 21 states have internal predecessors, (62), 5 states have call successors, (7), 3 states have call predecessors, (7), 8 states have return successors, (9), 8 states have call predecessors, (9), 3 states have call successors, (9) [2023-02-17 09:06:31,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 09:06:31,678 INFO L93 Difference]: Finished difference Result 24355 states and 82409 transitions. [2023-02-17 09:06:31,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2023-02-17 09:06:31,678 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 2.3846153846153846) internal successors, (62), 21 states have internal predecessors, (62), 5 states have call successors, (7), 3 states have call predecessors, (7), 8 states have return successors, (9), 8 states have call predecessors, (9), 3 states have call successors, (9) Word has length 55 [2023-02-17 09:06:31,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 09:06:31,872 INFO L225 Difference]: With dead ends: 24355 [2023-02-17 09:06:31,872 INFO L226 Difference]: Without dead ends: 18094 [2023-02-17 09:06:31,971 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 95 SyntacticMatches, 10 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 822 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=905, Invalid=3517, Unknown=0, NotChecked=0, Total=4422 [2023-02-17 09:06:31,971 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 132 mSDsluCounter, 278 mSDsCounter, 0 mSdLazyCounter, 749 mSolverCounterSat, 230 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 314 SdHoareTripleChecker+Invalid, 979 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 230 IncrementalHoareTripleChecker+Valid, 749 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-17 09:06:31,971 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [132 Valid, 314 Invalid, 979 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [230 Valid, 749 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-17 09:06:31,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18094 states. [2023-02-17 09:06:33,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18094 to 14204. [2023-02-17 09:06:33,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14204 states, 9444 states have (on average 1.0726387124099959) internal successors, (10130), 9522 states have internal predecessors, (10130), 2706 states have call successors, (2706), 364 states have call predecessors, (2706), 2050 states have return successors, (36260), 4317 states have call predecessors, (36260), 2553 states have call successors, (36260) [2023-02-17 09:06:33,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14204 states to 14204 states and 49096 transitions. [2023-02-17 09:06:33,484 INFO L78 Accepts]: Start accepts. Automaton has 14204 states and 49096 transitions. Word has length 55 [2023-02-17 09:06:33,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 09:06:33,485 INFO L495 AbstractCegarLoop]: Abstraction has 14204 states and 49096 transitions. [2023-02-17 09:06:33,485 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 2.3846153846153846) internal successors, (62), 21 states have internal predecessors, (62), 5 states have call successors, (7), 3 states have call predecessors, (7), 8 states have return successors, (9), 8 states have call predecessors, (9), 3 states have call successors, (9) [2023-02-17 09:06:33,485 INFO L276 IsEmpty]: Start isEmpty. Operand 14204 states and 49096 transitions. [2023-02-17 09:06:33,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2023-02-17 09:06:33,491 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 09:06:33,491 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1] [2023-02-17 09:06:33,500 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-02-17 09:06:33,692 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 09:06:33,692 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ackermannErr6ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2023-02-17 09:06:33,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 09:06:33,693 INFO L85 PathProgramCache]: Analyzing trace with hash 1321083776, now seen corresponding path program 2 times [2023-02-17 09:06:33,693 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 09:06:33,693 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1534997126] [2023-02-17 09:06:33,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 09:06:33,693 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 09:06:33,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 09:06:33,804 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 09:06:33,805 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 09:06:33,805 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1534997126] [2023-02-17 09:06:33,805 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1534997126] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 09:06:33,805 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1253371022] [2023-02-17 09:06:33,805 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-17 09:06:33,805 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 09:06:33,805 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 09:06:33,806 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-17 09:06:33,808 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-02-17 09:06:33,850 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-17 09:06:33,850 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-17 09:06:33,851 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 16 conjunts are in the unsatisfiable core [2023-02-17 09:06:33,852 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 09:06:33,930 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 09:06:33,930 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 09:06:34,147 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 09:06:34,147 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1253371022] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 09:06:34,147 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 09:06:34,147 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 31 [2023-02-17 09:06:34,147 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [89717531] [2023-02-17 09:06:34,148 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 09:06:34,148 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-02-17 09:06:34,148 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 09:06:34,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-02-17 09:06:34,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=244, Invalid=748, Unknown=0, NotChecked=0, Total=992 [2023-02-17 09:06:34,149 INFO L87 Difference]: Start difference. First operand 14204 states and 49096 transitions. Second operand has 32 states, 29 states have (on average 3.4827586206896552) internal successors, (101), 18 states have internal predecessors, (101), 14 states have call successors, (14), 14 states have call predecessors, (14), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 09:06:35,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 09:06:35,759 INFO L93 Difference]: Finished difference Result 22005 states and 73240 transitions. [2023-02-17 09:06:35,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2023-02-17 09:06:35,760 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 29 states have (on average 3.4827586206896552) internal successors, (101), 18 states have internal predecessors, (101), 14 states have call successors, (14), 14 states have call predecessors, (14), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2023-02-17 09:06:35,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 09:06:35,932 INFO L225 Difference]: With dead ends: 22005 [2023-02-17 09:06:35,932 INFO L226 Difference]: Without dead ends: 22004 [2023-02-17 09:06:35,950 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 90 SyntacticMatches, 12 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 795 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1054, Invalid=2368, Unknown=0, NotChecked=0, Total=3422 [2023-02-17 09:06:35,951 INFO L413 NwaCegarLoop]: 53 mSDtfsCounter, 713 mSDsluCounter, 477 mSDsCounter, 0 mSdLazyCounter, 718 mSolverCounterSat, 219 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 716 SdHoareTripleChecker+Valid, 530 SdHoareTripleChecker+Invalid, 937 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 219 IncrementalHoareTripleChecker+Valid, 718 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-17 09:06:35,951 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [716 Valid, 530 Invalid, 937 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [219 Valid, 718 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-17 09:06:35,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22004 states. [2023-02-17 09:06:37,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22004 to 20834. [2023-02-17 09:06:37,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20834 states, 13831 states have (on average 1.0657942303521075) internal successors, (14741), 14008 states have internal predecessors, (14741), 3890 states have call successors, (3890), 508 states have call predecessors, (3890), 3109 states have return successors, (51912), 6317 states have call predecessors, (51912), 3673 states have call successors, (51912) [2023-02-17 09:06:38,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20834 states to 20834 states and 70543 transitions. [2023-02-17 09:06:38,066 INFO L78 Accepts]: Start accepts. Automaton has 20834 states and 70543 transitions. Word has length 59 [2023-02-17 09:06:38,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 09:06:38,066 INFO L495 AbstractCegarLoop]: Abstraction has 20834 states and 70543 transitions. [2023-02-17 09:06:38,066 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 29 states have (on average 3.4827586206896552) internal successors, (101), 18 states have internal predecessors, (101), 14 states have call successors, (14), 14 states have call predecessors, (14), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 09:06:38,066 INFO L276 IsEmpty]: Start isEmpty. Operand 20834 states and 70543 transitions. [2023-02-17 09:06:38,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2023-02-17 09:06:38,068 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 09:06:38,068 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 09:06:38,079 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-02-17 09:06:38,273 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 09:06:38,273 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ackermannErr6ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2023-02-17 09:06:38,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 09:06:38,274 INFO L85 PathProgramCache]: Analyzing trace with hash -1343121217, now seen corresponding path program 3 times [2023-02-17 09:06:38,274 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 09:06:38,274 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1464569801] [2023-02-17 09:06:38,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 09:06:38,274 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 09:06:38,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 09:06:38,365 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2023-02-17 09:06:38,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 09:06:38,382 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 3 proven. 111 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-02-17 09:06:38,382 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 09:06:38,382 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1464569801] [2023-02-17 09:06:38,383 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1464569801] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 09:06:38,383 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [575741583] [2023-02-17 09:06:38,383 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-17 09:06:38,383 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 09:06:38,383 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 09:06:38,384 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-17 09:06:38,386 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-02-17 09:06:38,425 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2023-02-17 09:06:38,426 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-17 09:06:38,427 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 7 conjunts are in the unsatisfiable core [2023-02-17 09:06:38,428 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 09:06:38,453 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 87 proven. 0 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2023-02-17 09:06:38,453 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-17 09:06:38,453 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [575741583] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 09:06:38,453 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-02-17 09:06:38,453 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [15] total 19 [2023-02-17 09:06:38,453 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1156292966] [2023-02-17 09:06:38,454 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 09:06:38,454 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-17 09:06:38,454 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 09:06:38,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-17 09:06:38,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2023-02-17 09:06:38,455 INFO L87 Difference]: Start difference. First operand 20834 states and 70543 transitions. Second operand has 5 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-17 09:06:39,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 09:06:39,390 INFO L93 Difference]: Finished difference Result 20917 states and 71959 transitions. [2023-02-17 09:06:39,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-02-17 09:06:39,390 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 59 [2023-02-17 09:06:39,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 09:06:39,578 INFO L225 Difference]: With dead ends: 20917 [2023-02-17 09:06:39,578 INFO L226 Difference]: Without dead ends: 18654 [2023-02-17 09:06:39,609 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=357, Unknown=0, NotChecked=0, Total=420 [2023-02-17 09:06:39,610 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 32 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-17 09:06:39,610 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 50 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-17 09:06:39,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18654 states. [2023-02-17 09:06:41,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18654 to 18540. [2023-02-17 09:06:41,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18540 states, 11955 states have (on average 1.043245503973233) internal successors, (12472), 11949 states have internal predecessors, (12472), 3684 states have call successors, (3684), 332 states have call predecessors, (3684), 2897 states have return successors, (51628), 6258 states have call predecessors, (51628), 3673 states have call successors, (51628) [2023-02-17 09:06:41,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18540 states to 18540 states and 67784 transitions. [2023-02-17 09:06:41,506 INFO L78 Accepts]: Start accepts. Automaton has 18540 states and 67784 transitions. Word has length 59 [2023-02-17 09:06:41,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 09:06:41,506 INFO L495 AbstractCegarLoop]: Abstraction has 18540 states and 67784 transitions. [2023-02-17 09:06:41,506 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-17 09:06:41,507 INFO L276 IsEmpty]: Start isEmpty. Operand 18540 states and 67784 transitions. [2023-02-17 09:06:41,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2023-02-17 09:06:41,511 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 09:06:41,511 INFO L195 NwaCegarLoop]: trace histogram [9, 7, 5, 5, 5, 5, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 09:06:41,515 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2023-02-17 09:06:41,715 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 09:06:41,716 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ackermannErr6ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2023-02-17 09:06:41,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 09:06:41,716 INFO L85 PathProgramCache]: Analyzing trace with hash -1727955375, now seen corresponding path program 2 times [2023-02-17 09:06:41,716 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 09:06:41,716 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [330513950] [2023-02-17 09:06:41,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 09:06:41,716 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 09:06:41,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 09:06:41,802 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2023-02-17 09:06:41,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 09:06:41,846 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-02-17 09:06:41,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 09:06:41,881 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-02-17 09:06:41,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 09:06:41,899 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-02-17 09:06:41,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 09:06:41,921 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2023-02-17 09:06:41,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 09:06:41,942 INFO L134 CoverageAnalysis]: Checked inductivity of 163 backedges. 86 proven. 16 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2023-02-17 09:06:41,942 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 09:06:41,942 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [330513950] [2023-02-17 09:06:41,942 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [330513950] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 09:06:41,942 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1011865781] [2023-02-17 09:06:41,942 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-17 09:06:41,943 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 09:06:41,943 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 09:06:41,945 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-17 09:06:41,947 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-02-17 09:06:41,996 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-17 09:06:41,996 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-17 09:06:41,997 INFO L263 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 19 conjunts are in the unsatisfiable core [2023-02-17 09:06:41,998 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 09:06:42,061 INFO L134 CoverageAnalysis]: Checked inductivity of 163 backedges. 75 proven. 22 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2023-02-17 09:06:42,061 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 09:06:42,504 INFO L134 CoverageAnalysis]: Checked inductivity of 163 backedges. 94 proven. 8 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2023-02-17 09:06:42,504 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1011865781] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 09:06:42,504 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 09:06:42,504 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 16] total 32 [2023-02-17 09:06:42,504 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [882093288] [2023-02-17 09:06:42,504 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 09:06:42,505 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-02-17 09:06:42,505 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 09:06:42,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-02-17 09:06:42,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=930, Unknown=0, NotChecked=0, Total=1056 [2023-02-17 09:06:42,506 INFO L87 Difference]: Start difference. First operand 18540 states and 67784 transitions. Second operand has 33 states, 32 states have (on average 2.4375) internal successors, (78), 23 states have internal predecessors, (78), 7 states have call successors, (9), 5 states have call predecessors, (9), 8 states have return successors, (11), 10 states have call predecessors, (11), 3 states have call successors, (11) [2023-02-17 09:06:43,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 09:06:43,932 INFO L93 Difference]: Finished difference Result 28970 states and 107394 transitions. [2023-02-17 09:06:43,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-02-17 09:06:43,934 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 32 states have (on average 2.4375) internal successors, (78), 23 states have internal predecessors, (78), 7 states have call successors, (9), 5 states have call predecessors, (9), 8 states have return successors, (11), 10 states have call predecessors, (11), 3 states have call successors, (11) Word has length 80 [2023-02-17 09:06:43,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 09:06:44,028 INFO L225 Difference]: With dead ends: 28970 [2023-02-17 09:06:44,028 INFO L226 Difference]: Without dead ends: 10960 [2023-02-17 09:06:44,215 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 142 SyntacticMatches, 14 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 559 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=667, Invalid=2639, Unknown=0, NotChecked=0, Total=3306 [2023-02-17 09:06:44,216 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 226 mSDsluCounter, 347 mSDsCounter, 0 mSdLazyCounter, 768 mSolverCounterSat, 187 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 226 SdHoareTripleChecker+Valid, 384 SdHoareTripleChecker+Invalid, 955 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 187 IncrementalHoareTripleChecker+Valid, 768 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-17 09:06:44,216 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [226 Valid, 384 Invalid, 955 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [187 Valid, 768 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-17 09:06:44,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10960 states. [2023-02-17 09:06:44,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10960 to 10392. [2023-02-17 09:06:44,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10392 states, 7038 states have (on average 1.066780335322535) internal successors, (7508), 7204 states have internal predecessors, (7508), 2051 states have call successors, (2051), 356 states have call predecessors, (2051), 1299 states have return successors, (6727), 2831 states have call predecessors, (6727), 2043 states have call successors, (6727) [2023-02-17 09:06:44,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10392 states to 10392 states and 16286 transitions. [2023-02-17 09:06:44,920 INFO L78 Accepts]: Start accepts. Automaton has 10392 states and 16286 transitions. Word has length 80 [2023-02-17 09:06:44,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 09:06:44,920 INFO L495 AbstractCegarLoop]: Abstraction has 10392 states and 16286 transitions. [2023-02-17 09:06:44,921 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 32 states have (on average 2.4375) internal successors, (78), 23 states have internal predecessors, (78), 7 states have call successors, (9), 5 states have call predecessors, (9), 8 states have return successors, (11), 10 states have call predecessors, (11), 3 states have call successors, (11) [2023-02-17 09:06:44,921 INFO L276 IsEmpty]: Start isEmpty. Operand 10392 states and 16286 transitions. [2023-02-17 09:06:44,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2023-02-17 09:06:44,923 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 09:06:44,923 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 6, 6, 6, 5, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 09:06:44,927 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2023-02-17 09:06:45,126 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 09:06:45,126 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ackermannErr6ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2023-02-17 09:06:45,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 09:06:45,127 INFO L85 PathProgramCache]: Analyzing trace with hash 1935422832, now seen corresponding path program 3 times [2023-02-17 09:06:45,127 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 09:06:45,127 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [300950039] [2023-02-17 09:06:45,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 09:06:45,127 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 09:06:45,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 09:06:45,244 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-02-17 09:06:45,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 09:06:45,262 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-02-17 09:06:45,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 09:06:45,281 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 62 proven. 77 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-02-17 09:06:45,282 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 09:06:45,282 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [300950039] [2023-02-17 09:06:45,282 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [300950039] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 09:06:45,282 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2118393382] [2023-02-17 09:06:45,282 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-17 09:06:45,282 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 09:06:45,282 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 09:06:45,284 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-17 09:06:45,286 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-02-17 09:06:45,336 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2023-02-17 09:06:45,336 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-17 09:06:45,337 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 17 conjunts are in the unsatisfiable core [2023-02-17 09:06:45,338 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 09:06:45,409 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 60 proven. 79 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-02-17 09:06:45,409 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 09:06:45,583 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 64 proven. 75 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-02-17 09:06:45,583 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2118393382] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 09:06:45,583 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 09:06:45,583 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 33 [2023-02-17 09:06:45,583 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1844024096] [2023-02-17 09:06:45,583 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 09:06:45,583 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-02-17 09:06:45,583 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 09:06:45,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-02-17 09:06:45,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=949, Unknown=0, NotChecked=0, Total=1122 [2023-02-17 09:06:45,584 INFO L87 Difference]: Start difference. First operand 10392 states and 16286 transitions. Second operand has 34 states, 33 states have (on average 3.121212121212121) internal successors, (103), 22 states have internal predecessors, (103), 11 states have call successors, (13), 11 states have call predecessors, (13), 5 states have return successors, (5), 4 states have call predecessors, (5), 1 states have call successors, (5) [2023-02-17 09:06:46,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 09:06:46,323 INFO L93 Difference]: Finished difference Result 11147 states and 17428 transitions. [2023-02-17 09:06:46,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-02-17 09:06:46,324 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 3.121212121212121) internal successors, (103), 22 states have internal predecessors, (103), 11 states have call successors, (13), 11 states have call predecessors, (13), 5 states have return successors, (5), 4 states have call predecessors, (5), 1 states have call successors, (5) Word has length 68 [2023-02-17 09:06:46,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 09:06:46,357 INFO L225 Difference]: With dead ends: 11147 [2023-02-17 09:06:46,357 INFO L226 Difference]: Without dead ends: 11146 [2023-02-17 09:06:46,362 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 115 SyntacticMatches, 12 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 533 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=573, Invalid=1977, Unknown=0, NotChecked=0, Total=2550 [2023-02-17 09:06:46,362 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 247 mSDsluCounter, 217 mSDsCounter, 0 mSdLazyCounter, 474 mSolverCounterSat, 223 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 247 SdHoareTripleChecker+Valid, 248 SdHoareTripleChecker+Invalid, 697 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 223 IncrementalHoareTripleChecker+Valid, 474 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-17 09:06:46,362 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [247 Valid, 248 Invalid, 697 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [223 Valid, 474 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-17 09:06:46,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11146 states. [2023-02-17 09:06:46,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11146 to 10500. [2023-02-17 09:06:46,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10500 states, 7110 states have (on average 1.0635724331926864) internal successors, (7562), 7276 states have internal predecessors, (7562), 2051 states have call successors, (2051), 356 states have call predecessors, (2051), 1335 states have return successors, (6821), 2867 states have call predecessors, (6821), 2043 states have call successors, (6821) [2023-02-17 09:06:46,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10500 states to 10500 states and 16434 transitions. [2023-02-17 09:06:46,873 INFO L78 Accepts]: Start accepts. Automaton has 10500 states and 16434 transitions. Word has length 68 [2023-02-17 09:06:46,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 09:06:46,873 INFO L495 AbstractCegarLoop]: Abstraction has 10500 states and 16434 transitions. [2023-02-17 09:06:46,873 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 33 states have (on average 3.121212121212121) internal successors, (103), 22 states have internal predecessors, (103), 11 states have call successors, (13), 11 states have call predecessors, (13), 5 states have return successors, (5), 4 states have call predecessors, (5), 1 states have call successors, (5) [2023-02-17 09:06:46,873 INFO L276 IsEmpty]: Start isEmpty. Operand 10500 states and 16434 transitions. [2023-02-17 09:06:46,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2023-02-17 09:06:46,876 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 09:06:46,876 INFO L195 NwaCegarLoop]: trace histogram [13, 9, 7, 7, 7, 7, 7, 7, 7, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2023-02-17 09:06:46,881 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2023-02-17 09:06:47,080 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 09:06:47,081 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2023-02-17 09:06:47,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 09:06:47,081 INFO L85 PathProgramCache]: Analyzing trace with hash -1269437730, now seen corresponding path program 2 times [2023-02-17 09:06:47,081 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 09:06:47,081 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [670142906] [2023-02-17 09:06:47,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 09:06:47,082 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 09:06:47,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 09:06:47,131 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2023-02-17 09:06:47,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 09:06:47,153 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-02-17 09:06:47,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 09:06:47,184 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-02-17 09:06:47,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 09:06:47,233 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-02-17 09:06:47,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 09:06:47,247 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-02-17 09:06:47,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 09:06:47,249 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2023-02-17 09:06:47,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 09:06:47,251 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2023-02-17 09:06:47,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 09:06:47,254 INFO L134 CoverageAnalysis]: Checked inductivity of 362 backedges. 157 proven. 24 refuted. 0 times theorem prover too weak. 181 trivial. 0 not checked. [2023-02-17 09:06:47,254 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 09:06:47,254 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [670142906] [2023-02-17 09:06:47,254 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [670142906] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 09:06:47,254 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1988202528] [2023-02-17 09:06:47,255 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-17 09:06:47,255 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 09:06:47,255 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 09:06:47,256 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-17 09:06:47,272 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-02-17 09:06:47,326 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-17 09:06:47,327 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-17 09:06:47,328 INFO L263 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 7 conjunts are in the unsatisfiable core [2023-02-17 09:06:47,329 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 09:06:47,344 INFO L134 CoverageAnalysis]: Checked inductivity of 362 backedges. 157 proven. 15 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2023-02-17 09:06:47,344 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 09:06:47,423 INFO L134 CoverageAnalysis]: Checked inductivity of 362 backedges. 157 proven. 26 refuted. 0 times theorem prover too weak. 179 trivial. 0 not checked. [2023-02-17 09:06:47,423 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1988202528] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 09:06:47,423 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 09:06:47,423 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 8] total 13 [2023-02-17 09:06:47,424 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [264006277] [2023-02-17 09:06:47,424 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 09:06:47,425 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-02-17 09:06:47,425 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 09:06:47,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-02-17 09:06:47,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2023-02-17 09:06:47,426 INFO L87 Difference]: Start difference. First operand 10500 states and 16434 transitions. Second operand has 13 states, 13 states have (on average 6.3076923076923075) internal successors, (82), 13 states have internal predecessors, (82), 12 states have call successors, (14), 2 states have call predecessors, (14), 7 states have return successors, (14), 6 states have call predecessors, (14), 11 states have call successors, (14) [2023-02-17 09:06:47,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 09:06:47,996 INFO L93 Difference]: Finished difference Result 21289 states and 37508 transitions. [2023-02-17 09:06:47,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-02-17 09:06:47,997 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 113 [2023-02-17 09:06:47,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 09:06:48,045 INFO L225 Difference]: With dead ends: 21289 [2023-02-17 09:06:48,045 INFO L226 Difference]: Without dead ends: 11684 [2023-02-17 09:06:48,088 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 252 GetRequests, 228 SyntacticMatches, 8 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=102, Invalid=204, Unknown=0, NotChecked=0, Total=306 [2023-02-17 09:06:48,089 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 81 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 136 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-17 09:06:48,089 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [83 Valid, 77 Invalid, 136 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-17 09:06:48,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11684 states. [2023-02-17 09:06:48,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11684 to 10494. [2023-02-17 09:06:48,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10494 states, 7107 states have (on average 1.0635992683270015) internal successors, (7559), 7273 states have internal predecessors, (7559), 2048 states have call successors, (2048), 356 states have call predecessors, (2048), 1335 states have return successors, (6741), 2864 states have call predecessors, (6741), 2013 states have call successors, (6741) [2023-02-17 09:06:48,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10494 states to 10494 states and 16348 transitions. [2023-02-17 09:06:48,698 INFO L78 Accepts]: Start accepts. Automaton has 10494 states and 16348 transitions. Word has length 113 [2023-02-17 09:06:48,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 09:06:48,698 INFO L495 AbstractCegarLoop]: Abstraction has 10494 states and 16348 transitions. [2023-02-17 09:06:48,698 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 6.3076923076923075) internal successors, (82), 13 states have internal predecessors, (82), 12 states have call successors, (14), 2 states have call predecessors, (14), 7 states have return successors, (14), 6 states have call predecessors, (14), 11 states have call successors, (14) [2023-02-17 09:06:48,699 INFO L276 IsEmpty]: Start isEmpty. Operand 10494 states and 16348 transitions. [2023-02-17 09:06:48,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2023-02-17 09:06:48,702 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 09:06:48,702 INFO L195 NwaCegarLoop]: trace histogram [11, 9, 6, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2023-02-17 09:06:48,710 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2023-02-17 09:06:48,907 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 09:06:48,908 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2023-02-17 09:06:48,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 09:06:48,908 INFO L85 PathProgramCache]: Analyzing trace with hash -1307053986, now seen corresponding path program 3 times [2023-02-17 09:06:48,908 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 09:06:48,908 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1691900998] [2023-02-17 09:06:48,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 09:06:48,909 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 09:06:48,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 09:06:48,954 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-02-17 09:06:48,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 09:06:49,000 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-02-17 09:06:49,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 09:06:49,028 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-02-17 09:06:49,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 09:06:49,056 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-02-17 09:06:49,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 09:06:49,083 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-02-17 09:06:49,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 09:06:49,100 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-02-17 09:06:49,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 09:06:49,108 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2023-02-17 09:06:49,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 09:06:49,111 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2023-02-17 09:06:49,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 09:06:49,118 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2023-02-17 09:06:49,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 09:06:49,120 INFO L134 CoverageAnalysis]: Checked inductivity of 266 backedges. 117 proven. 45 refuted. 0 times theorem prover too weak. 104 trivial. 0 not checked. [2023-02-17 09:06:49,120 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 09:06:49,120 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1691900998] [2023-02-17 09:06:49,120 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1691900998] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 09:06:49,120 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1129745002] [2023-02-17 09:06:49,120 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-17 09:06:49,120 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 09:06:49,121 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 09:06:49,122 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-17 09:06:49,151 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-02-17 09:06:49,190 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2023-02-17 09:06:49,190 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-17 09:06:49,191 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 12 conjunts are in the unsatisfiable core [2023-02-17 09:06:49,192 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 09:06:49,224 INFO L134 CoverageAnalysis]: Checked inductivity of 266 backedges. 153 proven. 26 refuted. 0 times theorem prover too weak. 87 trivial. 0 not checked. [2023-02-17 09:06:49,225 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 09:06:49,360 INFO L134 CoverageAnalysis]: Checked inductivity of 266 backedges. 123 proven. 57 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2023-02-17 09:06:49,360 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1129745002] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 09:06:49,360 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 09:06:49,360 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 11] total 16 [2023-02-17 09:06:49,360 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [776987823] [2023-02-17 09:06:49,360 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 09:06:49,361 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-02-17 09:06:49,361 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 09:06:49,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-02-17 09:06:49,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2023-02-17 09:06:49,361 INFO L87 Difference]: Start difference. First operand 10494 states and 16348 transitions. Second operand has 16 states, 16 states have (on average 5.1875) internal successors, (83), 16 states have internal predecessors, (83), 9 states have call successors, (14), 2 states have call predecessors, (14), 7 states have return successors, (17), 5 states have call predecessors, (17), 9 states have call successors, (17) [2023-02-17 09:06:50,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 09:06:50,082 INFO L93 Difference]: Finished difference Result 24308 states and 49208 transitions. [2023-02-17 09:06:50,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-02-17 09:06:50,083 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 5.1875) internal successors, (83), 16 states have internal predecessors, (83), 9 states have call successors, (14), 2 states have call predecessors, (14), 7 states have return successors, (17), 5 states have call predecessors, (17), 9 states have call successors, (17) Word has length 100 [2023-02-17 09:06:50,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 09:06:50,157 INFO L225 Difference]: With dead ends: 24308 [2023-02-17 09:06:50,157 INFO L226 Difference]: Without dead ends: 14737 [2023-02-17 09:06:50,222 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 197 SyntacticMatches, 18 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=113, Invalid=267, Unknown=0, NotChecked=0, Total=380 [2023-02-17 09:06:50,222 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 73 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 146 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 195 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 146 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-17 09:06:50,223 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [80 Valid, 121 Invalid, 195 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 146 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-17 09:06:50,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14737 states. [2023-02-17 09:06:51,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14737 to 14372. [2023-02-17 09:06:51,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14372 states, 9692 states have (on average 1.0522080066033843) internal successors, (10198), 9951 states have internal predecessors, (10198), 2881 states have call successors, (2881), 496 states have call predecessors, (2881), 1795 states have return successors, (9707), 3924 states have call predecessors, (9707), 2826 states have call successors, (9707) [2023-02-17 09:06:51,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14372 states to 14372 states and 22786 transitions. [2023-02-17 09:06:51,320 INFO L78 Accepts]: Start accepts. Automaton has 14372 states and 22786 transitions. Word has length 100 [2023-02-17 09:06:51,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 09:06:51,321 INFO L495 AbstractCegarLoop]: Abstraction has 14372 states and 22786 transitions. [2023-02-17 09:06:51,321 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 5.1875) internal successors, (83), 16 states have internal predecessors, (83), 9 states have call successors, (14), 2 states have call predecessors, (14), 7 states have return successors, (17), 5 states have call predecessors, (17), 9 states have call successors, (17) [2023-02-17 09:06:51,321 INFO L276 IsEmpty]: Start isEmpty. Operand 14372 states and 22786 transitions. [2023-02-17 09:06:51,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2023-02-17 09:06:51,327 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 09:06:51,327 INFO L195 NwaCegarLoop]: trace histogram [10, 8, 7, 7, 7, 6, 6, 6, 4, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 09:06:51,332 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2023-02-17 09:06:51,532 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2023-02-17 09:06:51,532 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ackermannErr6ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2023-02-17 09:06:51,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 09:06:51,532 INFO L85 PathProgramCache]: Analyzing trace with hash 1104252262, now seen corresponding path program 3 times [2023-02-17 09:06:51,532 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 09:06:51,533 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1098414518] [2023-02-17 09:06:51,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 09:06:51,533 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 09:06:51,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 09:06:51,640 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-02-17 09:06:51,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 09:06:51,669 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-02-17 09:06:51,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 09:06:51,687 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-02-17 09:06:51,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 09:06:51,709 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2023-02-17 09:06:51,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 09:06:51,733 INFO L134 CoverageAnalysis]: Checked inductivity of 227 backedges. 120 proven. 86 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-02-17 09:06:51,733 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 09:06:51,733 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1098414518] [2023-02-17 09:06:51,734 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1098414518] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 09:06:51,734 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1112617563] [2023-02-17 09:06:51,734 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-17 09:06:51,734 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 09:06:51,734 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 09:06:51,735 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-17 09:06:51,737 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-02-17 09:06:51,806 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2023-02-17 09:06:51,806 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-17 09:06:51,807 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 31 conjunts are in the unsatisfiable core [2023-02-17 09:06:51,808 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 09:06:51,900 INFO L134 CoverageAnalysis]: Checked inductivity of 227 backedges. 113 proven. 41 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2023-02-17 09:06:51,901 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 09:06:51,945 INFO L134 CoverageAnalysis]: Checked inductivity of 227 backedges. 142 proven. 13 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2023-02-17 09:06:51,946 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1112617563] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 09:06:51,946 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 09:06:51,946 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 7, 8] total 29 [2023-02-17 09:06:51,946 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1789614674] [2023-02-17 09:06:51,946 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 09:06:51,947 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-02-17 09:06:51,947 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 09:06:51,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-02-17 09:06:51,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=723, Unknown=0, NotChecked=0, Total=812 [2023-02-17 09:06:51,948 INFO L87 Difference]: Start difference. First operand 14372 states and 22786 transitions. Second operand has 29 states, 29 states have (on average 3.6551724137931036) internal successors, (106), 22 states have internal predecessors, (106), 11 states have call successors, (15), 7 states have call predecessors, (15), 7 states have return successors, (10), 9 states have call predecessors, (10), 4 states have call successors, (10) [2023-02-17 09:06:53,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 09:06:53,193 INFO L93 Difference]: Finished difference Result 25330 states and 43230 transitions. [2023-02-17 09:06:53,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2023-02-17 09:06:53,193 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 3.6551724137931036) internal successors, (106), 22 states have internal predecessors, (106), 11 states have call successors, (15), 7 states have call predecessors, (15), 7 states have return successors, (10), 9 states have call predecessors, (10), 4 states have call successors, (10) Word has length 87 [2023-02-17 09:06:53,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 09:06:53,249 INFO L225 Difference]: With dead ends: 25330 [2023-02-17 09:06:53,249 INFO L226 Difference]: Without dead ends: 13103 [2023-02-17 09:06:53,312 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 246 GetRequests, 177 SyntacticMatches, 4 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 827 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=983, Invalid=3439, Unknown=0, NotChecked=0, Total=4422 [2023-02-17 09:06:53,312 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 255 mSDsluCounter, 126 mSDsCounter, 0 mSdLazyCounter, 959 mSolverCounterSat, 244 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 255 SdHoareTripleChecker+Valid, 147 SdHoareTripleChecker+Invalid, 1203 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 244 IncrementalHoareTripleChecker+Valid, 959 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-02-17 09:06:53,312 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [255 Valid, 147 Invalid, 1203 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [244 Valid, 959 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-02-17 09:06:53,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13103 states. [2023-02-17 09:06:53,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13103 to 11143. [2023-02-17 09:06:53,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11143 states, 7586 states have (on average 1.0460058001581862) internal successors, (7935), 7834 states have internal predecessors, (7935), 2175 states have call successors, (2175), 424 states have call predecessors, (2175), 1378 states have return successors, (5289), 2884 states have call predecessors, (5289), 2141 states have call successors, (5289) [2023-02-17 09:06:53,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11143 states to 11143 states and 15399 transitions. [2023-02-17 09:06:53,954 INFO L78 Accepts]: Start accepts. Automaton has 11143 states and 15399 transitions. Word has length 87 [2023-02-17 09:06:53,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 09:06:53,954 INFO L495 AbstractCegarLoop]: Abstraction has 11143 states and 15399 transitions. [2023-02-17 09:06:53,955 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 3.6551724137931036) internal successors, (106), 22 states have internal predecessors, (106), 11 states have call successors, (15), 7 states have call predecessors, (15), 7 states have return successors, (10), 9 states have call predecessors, (10), 4 states have call successors, (10) [2023-02-17 09:06:53,955 INFO L276 IsEmpty]: Start isEmpty. Operand 11143 states and 15399 transitions. [2023-02-17 09:06:53,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2023-02-17 09:06:53,958 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 09:06:53,958 INFO L195 NwaCegarLoop]: trace histogram [10, 8, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 09:06:53,966 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2023-02-17 09:06:54,162 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2023-02-17 09:06:54,162 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2023-02-17 09:06:54,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 09:06:54,162 INFO L85 PathProgramCache]: Analyzing trace with hash 1765664819, now seen corresponding path program 4 times [2023-02-17 09:06:54,162 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 09:06:54,163 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [952053204] [2023-02-17 09:06:54,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 09:06:54,163 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 09:06:54,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 09:06:54,234 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-02-17 09:06:54,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 09:06:54,285 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-02-17 09:06:54,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 09:06:54,330 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-02-17 09:06:54,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 09:06:54,358 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-02-17 09:06:54,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 09:06:54,375 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-02-17 09:06:54,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 09:06:54,394 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2023-02-17 09:06:54,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 09:06:54,414 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2023-02-17 09:06:54,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 09:06:54,420 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2023-02-17 09:06:54,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 09:06:54,428 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 51 proven. 69 refuted. 0 times theorem prover too weak. 101 trivial. 0 not checked. [2023-02-17 09:06:54,428 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 09:06:54,428 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [952053204] [2023-02-17 09:06:54,428 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [952053204] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 09:06:54,428 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [957990122] [2023-02-17 09:06:54,428 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-17 09:06:54,429 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 09:06:54,429 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 09:06:54,430 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-17 09:06:54,432 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-02-17 09:06:54,502 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-17 09:06:54,502 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-17 09:06:54,503 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 27 conjunts are in the unsatisfiable core [2023-02-17 09:06:54,504 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 09:06:54,575 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 34 proven. 71 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2023-02-17 09:06:54,576 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 09:06:54,923 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 42 proven. 93 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2023-02-17 09:06:54,923 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [957990122] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 09:06:54,924 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 09:06:54,924 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17, 23] total 42 [2023-02-17 09:06:54,924 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1199250381] [2023-02-17 09:06:54,924 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 09:06:54,924 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2023-02-17 09:06:54,924 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 09:06:54,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2023-02-17 09:06:54,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=207, Invalid=1599, Unknown=0, NotChecked=0, Total=1806 [2023-02-17 09:06:54,926 INFO L87 Difference]: Start difference. First operand 11143 states and 15399 transitions. Second operand has 43 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 33 states have internal predecessors, (80), 9 states have call successors, (11), 3 states have call predecessors, (11), 14 states have return successors, (17), 16 states have call predecessors, (17), 7 states have call successors, (17) [2023-02-17 09:06:58,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 09:06:58,257 INFO L93 Difference]: Finished difference Result 34681 states and 55092 transitions. [2023-02-17 09:06:58,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 143 states. [2023-02-17 09:06:58,257 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 33 states have internal predecessors, (80), 9 states have call successors, (11), 3 states have call predecessors, (11), 14 states have return successors, (17), 16 states have call predecessors, (17), 7 states have call successors, (17) Word has length 91 [2023-02-17 09:06:58,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 09:06:58,381 INFO L225 Difference]: With dead ends: 34681 [2023-02-17 09:06:58,381 INFO L226 Difference]: Without dead ends: 33579 [2023-02-17 09:06:58,403 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 356 GetRequests, 165 SyntacticMatches, 12 SemanticMatches, 179 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12205 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=5454, Invalid=27126, Unknown=0, NotChecked=0, Total=32580 [2023-02-17 09:06:58,404 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 383 mSDsluCounter, 337 mSDsCounter, 0 mSdLazyCounter, 1837 mSolverCounterSat, 925 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 394 SdHoareTripleChecker+Valid, 359 SdHoareTripleChecker+Invalid, 2762 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 925 IncrementalHoareTripleChecker+Valid, 1837 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-02-17 09:06:58,404 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [394 Valid, 359 Invalid, 2762 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [925 Valid, 1837 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-02-17 09:06:58,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33579 states. [2023-02-17 09:06:59,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33579 to 21093. [2023-02-17 09:06:59,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21093 states, 13678 states have (on average 1.0274162889311302) internal successors, (14053), 13909 states have internal predecessors, (14053), 4366 states have call successors, (4366), 532 states have call predecessors, (4366), 3045 states have return successors, (14390), 6651 states have call predecessors, (14390), 4312 states have call successors, (14390) [2023-02-17 09:06:59,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21093 states to 21093 states and 32809 transitions. [2023-02-17 09:06:59,739 INFO L78 Accepts]: Start accepts. Automaton has 21093 states and 32809 transitions. Word has length 91 [2023-02-17 09:06:59,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 09:06:59,739 INFO L495 AbstractCegarLoop]: Abstraction has 21093 states and 32809 transitions. [2023-02-17 09:06:59,740 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 33 states have internal predecessors, (80), 9 states have call successors, (11), 3 states have call predecessors, (11), 14 states have return successors, (17), 16 states have call predecessors, (17), 7 states have call successors, (17) [2023-02-17 09:06:59,740 INFO L276 IsEmpty]: Start isEmpty. Operand 21093 states and 32809 transitions. [2023-02-17 09:06:59,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2023-02-17 09:06:59,745 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 09:06:59,745 INFO L195 NwaCegarLoop]: trace histogram [15, 15, 15, 15, 15, 14, 14, 14, 1, 1, 1, 1, 1, 1] [2023-02-17 09:06:59,750 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2023-02-17 09:06:59,949 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2023-02-17 09:06:59,950 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ackermannErr6ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2023-02-17 09:06:59,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 09:06:59,950 INFO L85 PathProgramCache]: Analyzing trace with hash 1934326320, now seen corresponding path program 3 times [2023-02-17 09:06:59,950 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 09:06:59,951 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1467407363] [2023-02-17 09:06:59,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 09:06:59,951 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 09:06:59,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 09:07:00,303 INFO L134 CoverageAnalysis]: Checked inductivity of 812 backedges. 0 proven. 812 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 09:07:00,304 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 09:07:00,304 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1467407363] [2023-02-17 09:07:00,304 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1467407363] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 09:07:00,304 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [959575772] [2023-02-17 09:07:00,304 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-17 09:07:00,304 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 09:07:00,304 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 09:07:00,305 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-17 09:07:00,307 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-02-17 09:07:00,399 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2023-02-17 09:07:00,399 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-17 09:07:00,401 INFO L263 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 32 conjunts are in the unsatisfiable core [2023-02-17 09:07:00,402 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 09:07:00,644 INFO L134 CoverageAnalysis]: Checked inductivity of 812 backedges. 0 proven. 812 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 09:07:00,644 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 09:07:01,215 INFO L134 CoverageAnalysis]: Checked inductivity of 812 backedges. 0 proven. 812 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 09:07:01,215 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [959575772] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 09:07:01,215 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 09:07:01,215 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32, 32] total 63 [2023-02-17 09:07:01,215 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [975183155] [2023-02-17 09:07:01,216 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 09:07:01,216 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2023-02-17 09:07:01,216 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 09:07:01,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2023-02-17 09:07:01,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=996, Invalid=3036, Unknown=0, NotChecked=0, Total=4032 [2023-02-17 09:07:01,217 INFO L87 Difference]: Start difference. First operand 21093 states and 32809 transitions. Second operand has 64 states, 61 states have (on average 3.4918032786885247) internal successors, (213), 34 states have internal predecessors, (213), 30 states have call successors, (30), 30 states have call predecessors, (30), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 09:07:04,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 09:07:04,182 INFO L93 Difference]: Finished difference Result 36182 states and 56297 transitions. [2023-02-17 09:07:04,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2023-02-17 09:07:04,182 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 61 states have (on average 3.4918032786885247) internal successors, (213), 34 states have internal predecessors, (213), 30 states have call successors, (30), 30 states have call predecessors, (30), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 123 [2023-02-17 09:07:04,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 09:07:04,307 INFO L225 Difference]: With dead ends: 36182 [2023-02-17 09:07:04,307 INFO L226 Difference]: Without dead ends: 36181 [2023-02-17 09:07:04,324 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 335 GetRequests, 186 SyntacticMatches, 28 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4031 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=4654, Invalid=10352, Unknown=0, NotChecked=0, Total=15006 [2023-02-17 09:07:04,325 INFO L413 NwaCegarLoop]: 83 mSDtfsCounter, 1372 mSDsluCounter, 865 mSDsCounter, 0 mSdLazyCounter, 1217 mSolverCounterSat, 813 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1376 SdHoareTripleChecker+Valid, 948 SdHoareTripleChecker+Invalid, 2030 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 813 IncrementalHoareTripleChecker+Valid, 1217 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-02-17 09:07:04,325 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1376 Valid, 948 Invalid, 2030 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [813 Valid, 1217 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-02-17 09:07:04,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36181 states. [2023-02-17 09:07:06,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36181 to 36181. [2023-02-17 09:07:06,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36181 states, 23422 states have (on average 1.0283067201776108) internal successors, (24085), 23941 states have internal predecessors, (24085), 7326 states have call successors, (7326), 820 states have call predecessors, (7326), 5429 states have return successors, (24870), 11419 states have call predecessors, (24870), 7272 states have call successors, (24870) [2023-02-17 09:07:06,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36181 states to 36181 states and 56281 transitions. [2023-02-17 09:07:06,408 INFO L78 Accepts]: Start accepts. Automaton has 36181 states and 56281 transitions. Word has length 123 [2023-02-17 09:07:06,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 09:07:06,409 INFO L495 AbstractCegarLoop]: Abstraction has 36181 states and 56281 transitions. [2023-02-17 09:07:06,409 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 61 states have (on average 3.4918032786885247) internal successors, (213), 34 states have internal predecessors, (213), 30 states have call successors, (30), 30 states have call predecessors, (30), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 09:07:06,409 INFO L276 IsEmpty]: Start isEmpty. Operand 36181 states and 56281 transitions. [2023-02-17 09:07:06,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2023-02-17 09:07:06,421 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 09:07:06,421 INFO L195 NwaCegarLoop]: trace histogram [20, 20, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1] [2023-02-17 09:07:06,425 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2023-02-17 09:07:06,625 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 09:07:06,625 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ackermannErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2023-02-17 09:07:06,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 09:07:06,625 INFO L85 PathProgramCache]: Analyzing trace with hash 951429890, now seen corresponding path program 2 times [2023-02-17 09:07:06,625 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 09:07:06,626 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [744778380] [2023-02-17 09:07:06,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 09:07:06,626 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 09:07:06,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 09:07:06,965 INFO L134 CoverageAnalysis]: Checked inductivity of 894 backedges. 0 proven. 867 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2023-02-17 09:07:06,965 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 09:07:06,966 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [744778380] [2023-02-17 09:07:06,966 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [744778380] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 09:07:06,966 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [911054956] [2023-02-17 09:07:06,966 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-17 09:07:06,966 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 09:07:06,966 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 09:07:06,967 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-17 09:07:06,970 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-02-17 09:07:07,068 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-17 09:07:07,069 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-17 09:07:07,070 INFO L263 TraceCheckSpWp]: Trace formula consists of 342 conjuncts, 42 conjunts are in the unsatisfiable core [2023-02-17 09:07:07,072 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 09:07:07,542 INFO L134 CoverageAnalysis]: Checked inductivity of 894 backedges. 0 proven. 867 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2023-02-17 09:07:07,542 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 09:07:08,031 INFO L134 CoverageAnalysis]: Checked inductivity of 894 backedges. 0 proven. 867 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2023-02-17 09:07:08,031 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [911054956] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 09:07:08,031 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 09:07:08,031 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 47 [2023-02-17 09:07:08,031 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1442698581] [2023-02-17 09:07:08,031 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 09:07:08,032 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2023-02-17 09:07:08,032 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 09:07:08,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2023-02-17 09:07:08,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=556, Invalid=1700, Unknown=0, NotChecked=0, Total=2256 [2023-02-17 09:07:08,034 INFO L87 Difference]: Start difference. First operand 36181 states and 56281 transitions. Second operand has 48 states, 47 states have (on average 4.340425531914893) internal successors, (204), 26 states have internal predecessors, (204), 22 states have call successors, (40), 22 states have call predecessors, (40), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 09:07:12,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 09:07:12,432 INFO L93 Difference]: Finished difference Result 81606 states and 127883 transitions. [2023-02-17 09:07:12,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2023-02-17 09:07:12,432 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 47 states have (on average 4.340425531914893) internal successors, (204), 26 states have internal predecessors, (204), 22 states have call successors, (40), 22 states have call predecessors, (40), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 141 [2023-02-17 09:07:12,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 09:07:12,729 INFO L225 Difference]: With dead ends: 81606 [2023-02-17 09:07:12,729 INFO L226 Difference]: Without dead ends: 81605 [2023-02-17 09:07:12,766 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 365 GetRequests, 229 SyntacticMatches, 47 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2560 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=2534, Invalid=5656, Unknown=0, NotChecked=0, Total=8190 [2023-02-17 09:07:12,766 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 1462 mSDsluCounter, 544 mSDsCounter, 0 mSdLazyCounter, 1093 mSolverCounterSat, 604 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1465 SdHoareTripleChecker+Valid, 571 SdHoareTripleChecker+Invalid, 1697 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 604 IncrementalHoareTripleChecker+Valid, 1093 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-02-17 09:07:12,767 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1465 Valid, 571 Invalid, 1697 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [604 Valid, 1093 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-02-17 09:07:12,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81605 states. [2023-02-17 09:07:17,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81605 to 81553. [2023-02-17 09:07:17,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81553 states, 52918 states have (on average 1.0290827317736877) internal successors, (54457), 54121 states have internal predecessors, (54457), 16494 states have call successors, (16494), 1900 states have call predecessors, (16494), 12137 states have return successors, (56910), 25531 states have call predecessors, (56910), 16380 states have call successors, (56910) [2023-02-17 09:07:17,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81553 states to 81553 states and 127861 transitions. [2023-02-17 09:07:17,503 INFO L78 Accepts]: Start accepts. Automaton has 81553 states and 127861 transitions. Word has length 141 [2023-02-17 09:07:17,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 09:07:17,503 INFO L495 AbstractCegarLoop]: Abstraction has 81553 states and 127861 transitions. [2023-02-17 09:07:17,504 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 47 states have (on average 4.340425531914893) internal successors, (204), 26 states have internal predecessors, (204), 22 states have call successors, (40), 22 states have call predecessors, (40), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 09:07:17,504 INFO L276 IsEmpty]: Start isEmpty. Operand 81553 states and 127861 transitions. [2023-02-17 09:07:17,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 275 [2023-02-17 09:07:17,521 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 09:07:17,521 INFO L195 NwaCegarLoop]: trace histogram [31, 24, 20, 20, 20, 20, 19, 19, 17, 7, 7, 7, 7, 7, 7, 6, 6, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1] [2023-02-17 09:07:17,525 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2023-02-17 09:07:17,721 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2023-02-17 09:07:17,721 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ackermannErr7ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2023-02-17 09:07:17,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 09:07:17,722 INFO L85 PathProgramCache]: Analyzing trace with hash -76175906, now seen corresponding path program 1 times [2023-02-17 09:07:17,722 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 09:07:17,722 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [414616809] [2023-02-17 09:07:17,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 09:07:17,722 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 09:07:17,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 09:07:17,940 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2023-02-17 09:07:17,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 09:07:18,036 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-02-17 09:07:18,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 09:07:18,117 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-02-17 09:07:18,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 09:07:18,139 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-02-17 09:07:18,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 09:07:18,156 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-02-17 09:07:18,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 09:07:18,167 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-02-17 09:07:18,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 09:07:18,182 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2023-02-17 09:07:18,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 09:07:18,197 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2023-02-17 09:07:18,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 09:07:18,244 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-02-17 09:07:18,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 09:07:18,279 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-02-17 09:07:18,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 09:07:18,307 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-02-17 09:07:18,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 09:07:18,329 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-02-17 09:07:18,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 09:07:18,346 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-02-17 09:07:18,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 09:07:18,350 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2023-02-17 09:07:18,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 09:07:18,351 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2023-02-17 09:07:18,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 09:07:18,353 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2023-02-17 09:07:18,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 09:07:18,356 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2023-02-17 09:07:18,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 09:07:18,359 INFO L134 CoverageAnalysis]: Checked inductivity of 2532 backedges. 844 proven. 214 refuted. 0 times theorem prover too weak. 1474 trivial. 0 not checked. [2023-02-17 09:07:18,359 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 09:07:18,360 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [414616809] [2023-02-17 09:07:18,360 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [414616809] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 09:07:18,360 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [126915975] [2023-02-17 09:07:18,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 09:07:18,360 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 09:07:18,360 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 09:07:18,361 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-17 09:07:18,364 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2023-02-17 09:07:18,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 09:07:18,507 INFO L263 TraceCheckSpWp]: Trace formula consists of 632 conjuncts, 25 conjunts are in the unsatisfiable core [2023-02-17 09:07:18,510 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 09:07:18,581 INFO L134 CoverageAnalysis]: Checked inductivity of 2532 backedges. 832 proven. 216 refuted. 0 times theorem prover too weak. 1484 trivial. 0 not checked. [2023-02-17 09:07:18,581 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 09:07:19,134 INFO L134 CoverageAnalysis]: Checked inductivity of 2532 backedges. 848 proven. 263 refuted. 0 times theorem prover too weak. 1421 trivial. 0 not checked. [2023-02-17 09:07:19,135 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [126915975] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 09:07:19,135 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 09:07:19,135 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 21] total 27 [2023-02-17 09:07:19,135 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1527399632] [2023-02-17 09:07:19,135 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 09:07:19,136 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-02-17 09:07:19,136 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 09:07:19,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-02-17 09:07:19,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=589, Unknown=0, NotChecked=0, Total=702 [2023-02-17 09:07:19,137 INFO L87 Difference]: Start difference. First operand 81553 states and 127861 transitions. Second operand has 27 states, 27 states have (on average 4.555555555555555) internal successors, (123), 24 states have internal predecessors, (123), 16 states have call successors, (18), 2 states have call predecessors, (18), 14 states have return successors, (29), 12 states have call predecessors, (29), 15 states have call successors, (29) [2023-02-17 09:07:25,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 09:07:25,273 INFO L93 Difference]: Finished difference Result 191506 states and 387267 transitions. [2023-02-17 09:07:25,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-02-17 09:07:25,274 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 4.555555555555555) internal successors, (123), 24 states have internal predecessors, (123), 16 states have call successors, (18), 2 states have call predecessors, (18), 14 states have return successors, (29), 12 states have call predecessors, (29), 15 states have call successors, (29) Word has length 274 [2023-02-17 09:07:25,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 09:07:26,218 INFO L225 Difference]: With dead ends: 191506 [2023-02-17 09:07:26,218 INFO L226 Difference]: Without dead ends: 119313 [2023-02-17 09:07:26,755 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 625 GetRequests, 551 SyntacticMatches, 31 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 569 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=423, Invalid=1557, Unknown=0, NotChecked=0, Total=1980 [2023-02-17 09:07:26,756 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 70 mSDsluCounter, 239 mSDsCounter, 0 mSdLazyCounter, 566 mSolverCounterSat, 109 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 273 SdHoareTripleChecker+Invalid, 675 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 109 IncrementalHoareTripleChecker+Valid, 566 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-17 09:07:26,756 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [75 Valid, 273 Invalid, 675 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [109 Valid, 566 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-17 09:07:26,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119313 states. [2023-02-17 09:07:32,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119313 to 81335. [2023-02-17 09:07:32,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81335 states, 52809 states have (on average 1.0291427597568596) internal successors, (54348), 54012 states have internal predecessors, (54348), 16385 states have call successors, (16385), 1900 states have call predecessors, (16385), 12137 states have return successors, (56843), 25422 states have call predecessors, (56843), 16271 states have call successors, (56843) [2023-02-17 09:07:33,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81335 states to 81335 states and 127576 transitions. [2023-02-17 09:07:33,353 INFO L78 Accepts]: Start accepts. Automaton has 81335 states and 127576 transitions. Word has length 274 [2023-02-17 09:07:33,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 09:07:33,353 INFO L495 AbstractCegarLoop]: Abstraction has 81335 states and 127576 transitions. [2023-02-17 09:07:33,353 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 4.555555555555555) internal successors, (123), 24 states have internal predecessors, (123), 16 states have call successors, (18), 2 states have call predecessors, (18), 14 states have return successors, (29), 12 states have call predecessors, (29), 15 states have call successors, (29) [2023-02-17 09:07:33,354 INFO L276 IsEmpty]: Start isEmpty. Operand 81335 states and 127576 transitions. [2023-02-17 09:07:33,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 317 [2023-02-17 09:07:33,373 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 09:07:33,373 INFO L195 NwaCegarLoop]: trace histogram [36, 25, 22, 22, 22, 22, 22, 22, 21, 11, 11, 10, 10, 10, 10, 8, 8, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1] [2023-02-17 09:07:33,388 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2023-02-17 09:07:33,588 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 09:07:33,588 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2023-02-17 09:07:33,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 09:07:33,588 INFO L85 PathProgramCache]: Analyzing trace with hash 1149613848, now seen corresponding path program 5 times [2023-02-17 09:07:33,588 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 09:07:33,589 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1051262315] [2023-02-17 09:07:33,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 09:07:33,589 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 09:07:33,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 09:07:34,237 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2023-02-17 09:07:34,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 09:07:34,241 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-02-17 09:07:34,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 09:07:34,243 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-02-17 09:07:34,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 09:07:34,245 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-02-17 09:07:34,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 09:07:34,246 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2023-02-17 09:07:34,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 09:07:34,247 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 161 [2023-02-17 09:07:34,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 09:07:34,381 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-02-17 09:07:34,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 09:07:34,502 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-02-17 09:07:34,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 09:07:34,599 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-02-17 09:07:34,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 09:07:34,677 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-02-17 09:07:34,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 09:07:34,735 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-02-17 09:07:34,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 09:07:34,785 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-02-17 09:07:34,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 09:07:34,829 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-02-17 09:07:34,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 09:07:34,856 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-02-17 09:07:34,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 09:07:34,885 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2023-02-17 09:07:34,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 09:07:34,917 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2023-02-17 09:07:34,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 09:07:34,922 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2023-02-17 09:07:34,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 09:07:34,930 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2023-02-17 09:07:34,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 09:07:34,937 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2023-02-17 09:07:34,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 09:07:34,942 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2023-02-17 09:07:34,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 09:07:34,949 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 138 [2023-02-17 09:07:34,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 09:07:34,956 INFO L134 CoverageAnalysis]: Checked inductivity of 3375 backedges. 552 proven. 283 refuted. 0 times theorem prover too weak. 2540 trivial. 0 not checked. [2023-02-17 09:07:34,956 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 09:07:34,957 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1051262315] [2023-02-17 09:07:34,957 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1051262315] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 09:07:34,957 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1354712258] [2023-02-17 09:07:34,957 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-17 09:07:34,957 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 09:07:34,957 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 09:07:34,958 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-17 09:07:34,960 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2023-02-17 09:07:35,121 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 17 check-sat command(s) [2023-02-17 09:07:35,121 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-17 09:07:35,123 INFO L263 TraceCheckSpWp]: Trace formula consists of 451 conjuncts, 45 conjunts are in the unsatisfiable core [2023-02-17 09:07:35,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 09:07:35,543 INFO L134 CoverageAnalysis]: Checked inductivity of 3375 backedges. 674 proven. 496 refuted. 0 times theorem prover too weak. 2205 trivial. 0 not checked. [2023-02-17 09:07:35,543 INFO L328 TraceCheckSpWp]: Computing backward predicates...