./Ultimate.py --spec ../sv-benchmarks/c/properties/no-overflow.prp --file ../sv-benchmarks/c/termination-numeric/Ackermann01-1.c --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version 26d01a9c Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/termination-numeric/Ackermann01-1.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Overflow-64bit-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 64bit --witnessprinter.graph.data.programhash 380ed529f726f53285b49ce40e57404dbe066b029b8c3af7ce337366515780a5 --- Real Ultimate output --- This is Ultimate 0.2.2-?-26d01a9 [2023-02-18 08:15:31,264 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-02-18 08:15:31,266 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-02-18 08:15:31,295 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-02-18 08:15:31,295 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-02-18 08:15:31,298 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-02-18 08:15:31,300 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-02-18 08:15:31,302 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-02-18 08:15:31,305 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-02-18 08:15:31,308 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-02-18 08:15:31,309 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-02-18 08:15:31,311 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-02-18 08:15:31,311 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-02-18 08:15:31,313 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-02-18 08:15:31,313 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-02-18 08:15:31,316 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-02-18 08:15:31,316 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-02-18 08:15:31,318 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-02-18 08:15:31,319 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-02-18 08:15:31,322 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-02-18 08:15:31,323 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-02-18 08:15:31,324 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-02-18 08:15:31,324 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-02-18 08:15:31,325 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-02-18 08:15:31,331 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-02-18 08:15:31,331 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-02-18 08:15:31,331 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-02-18 08:15:31,332 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-02-18 08:15:31,333 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-02-18 08:15:31,333 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-02-18 08:15:31,333 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-02-18 08:15:31,334 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-02-18 08:15:31,335 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-02-18 08:15:31,335 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-02-18 08:15:31,337 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-02-18 08:15:31,337 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-02-18 08:15:31,337 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-02-18 08:15:31,337 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-02-18 08:15:31,338 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-02-18 08:15:31,338 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-02-18 08:15:31,340 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-02-18 08:15:31,342 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Overflow-64bit-Automizer_Default.epf [2023-02-18 08:15:31,363 INFO L113 SettingsManager]: Loading preferences was successful [2023-02-18 08:15:31,363 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-02-18 08:15:31,364 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-02-18 08:15:31,364 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-02-18 08:15:31,372 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-02-18 08:15:31,373 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-02-18 08:15:31,373 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-02-18 08:15:31,373 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-02-18 08:15:31,374 INFO L138 SettingsManager]: * Use SBE=true [2023-02-18 08:15:31,374 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-02-18 08:15:31,374 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-02-18 08:15:31,375 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-02-18 08:15:31,375 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-02-18 08:15:31,375 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-02-18 08:15:31,375 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-02-18 08:15:31,375 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-02-18 08:15:31,375 INFO L138 SettingsManager]: * Check absence of signed integer overflows=true [2023-02-18 08:15:31,376 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-02-18 08:15:31,376 INFO L138 SettingsManager]: * Use constant arrays=true [2023-02-18 08:15:31,376 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-02-18 08:15:31,376 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-02-18 08:15:31,376 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-02-18 08:15:31,376 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-02-18 08:15:31,377 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-18 08:15:31,377 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-02-18 08:15:31,377 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-02-18 08:15:31,377 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-02-18 08:15:31,377 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-02-18 08:15:31,378 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-02-18 08:15:31,378 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-02-18 08:15:31,378 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-02-18 08:15:31,378 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-02-18 08:15:31,378 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-02-18 08:15:31,378 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-02-18 08:15:31,379 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 380ed529f726f53285b49ce40e57404dbe066b029b8c3af7ce337366515780a5 [2023-02-18 08:15:31,593 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-02-18 08:15:31,613 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-02-18 08:15:31,615 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-02-18 08:15:31,615 INFO L271 PluginConnector]: Initializing CDTParser... [2023-02-18 08:15:31,616 INFO L275 PluginConnector]: CDTParser initialized [2023-02-18 08:15:31,617 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/termination-numeric/Ackermann01-1.c [2023-02-18 08:15:32,584 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-02-18 08:15:32,681 INFO L351 CDTParser]: Found 1 translation units. [2023-02-18 08:15:32,681 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/termination-numeric/Ackermann01-1.c [2023-02-18 08:15:32,685 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a66db093b/0e475d35a221429086a08d82a0660bb4/FLAG7fc9fa0c1 [2023-02-18 08:15:32,695 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a66db093b/0e475d35a221429086a08d82a0660bb4 [2023-02-18 08:15:32,696 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-02-18 08:15:32,697 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-02-18 08:15:32,699 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-02-18 08:15:32,699 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-02-18 08:15:32,701 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-02-18 08:15:32,702 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.02 08:15:32" (1/1) ... [2023-02-18 08:15:32,703 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@69fd825b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 08:15:32, skipping insertion in model container [2023-02-18 08:15:32,703 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.02 08:15:32" (1/1) ... [2023-02-18 08:15:32,707 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-02-18 08:15:32,717 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-02-18 08:15:32,814 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/termination-numeric/Ackermann01-1.c[944,957] [2023-02-18 08:15:32,815 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-18 08:15:32,822 INFO L203 MainTranslator]: Completed pre-run [2023-02-18 08:15:32,835 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/termination-numeric/Ackermann01-1.c[944,957] [2023-02-18 08:15:32,836 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-18 08:15:32,845 INFO L208 MainTranslator]: Completed translation [2023-02-18 08:15:32,846 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 08:15:32 WrapperNode [2023-02-18 08:15:32,846 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-02-18 08:15:32,847 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-02-18 08:15:32,847 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-02-18 08:15:32,847 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-02-18 08:15:32,852 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 08:15:32" (1/1) ... [2023-02-18 08:15:32,857 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 08:15:32" (1/1) ... [2023-02-18 08:15:32,867 INFO L138 Inliner]: procedures = 13, calls = 11, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 32 [2023-02-18 08:15:32,868 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-02-18 08:15:32,868 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-02-18 08:15:32,868 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-02-18 08:15:32,868 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-02-18 08:15:32,874 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 08:15:32" (1/1) ... [2023-02-18 08:15:32,874 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 08:15:32" (1/1) ... [2023-02-18 08:15:32,882 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 08:15:32" (1/1) ... [2023-02-18 08:15:32,883 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 08:15:32" (1/1) ... [2023-02-18 08:15:32,888 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 08:15:32" (1/1) ... [2023-02-18 08:15:32,890 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 08:15:32" (1/1) ... [2023-02-18 08:15:32,894 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 08:15:32" (1/1) ... [2023-02-18 08:15:32,895 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 08:15:32" (1/1) ... [2023-02-18 08:15:32,896 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-02-18 08:15:32,898 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-02-18 08:15:32,898 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-02-18 08:15:32,898 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-02-18 08:15:32,899 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 08:15:32" (1/1) ... [2023-02-18 08:15:32,903 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-18 08:15:32,910 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 08:15:32,925 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-02-18 08:15:32,931 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-02-18 08:15:32,956 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-02-18 08:15:32,956 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-02-18 08:15:32,956 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-02-18 08:15:32,956 INFO L130 BoogieDeclarations]: Found specification of procedure ackermann [2023-02-18 08:15:32,956 INFO L138 BoogieDeclarations]: Found implementation of procedure ackermann [2023-02-18 08:15:32,956 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-02-18 08:15:32,999 INFO L235 CfgBuilder]: Building ICFG [2023-02-18 08:15:33,000 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2023-02-18 08:15:33,150 INFO L276 CfgBuilder]: Performing block encoding [2023-02-18 08:15:33,155 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-02-18 08:15:33,155 INFO L300 CfgBuilder]: Removed 0 assume(true) statements. [2023-02-18 08:15:33,156 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.02 08:15:33 BoogieIcfgContainer [2023-02-18 08:15:33,157 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-02-18 08:15:33,158 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-02-18 08:15:33,158 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-02-18 08:15:33,160 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-02-18 08:15:33,160 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.02 08:15:32" (1/3) ... [2023-02-18 08:15:33,161 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3d08c2f9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.02 08:15:33, skipping insertion in model container [2023-02-18 08:15:33,161 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 08:15:32" (2/3) ... [2023-02-18 08:15:33,161 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3d08c2f9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.02 08:15:33, skipping insertion in model container [2023-02-18 08:15:33,162 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.02 08:15:33" (3/3) ... [2023-02-18 08:15:33,163 INFO L112 eAbstractionObserver]: Analyzing ICFG Ackermann01-1.c [2023-02-18 08:15:33,174 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-02-18 08:15:33,175 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 8 error locations. [2023-02-18 08:15:33,225 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-02-18 08:15:33,230 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;@325c2037, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-02-18 08:15:33,231 INFO L358 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2023-02-18 08:15:33,234 INFO L276 IsEmpty]: Start isEmpty. Operand has 38 states, 24 states have (on average 1.5416666666666667) internal successors, (37), 32 states have internal predecessors, (37), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-02-18 08:15:33,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-02-18 08:15:33,239 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 08:15:33,239 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 08:15:33,241 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2023-02-18 08:15:33,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 08:15:33,248 INFO L85 PathProgramCache]: Analyzing trace with hash 180762217, now seen corresponding path program 1 times [2023-02-18 08:15:33,253 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 08:15:33,253 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [267319434] [2023-02-18 08:15:33,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 08:15:33,254 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 08:15:33,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 08:15:33,457 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 08:15:33,458 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 08:15:33,458 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [267319434] [2023-02-18 08:15:33,459 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [267319434] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 08:15:33,459 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 08:15:33,459 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-18 08:15:33,460 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1678149951] [2023-02-18 08:15:33,460 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 08:15:33,463 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-18 08:15:33,463 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 08:15:33,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-18 08:15:33,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-02-18 08:15:33,483 INFO L87 Difference]: Start difference. First operand has 38 states, 24 states have (on average 1.5416666666666667) internal successors, (37), 32 states have internal predecessors, (37), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 5 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 08:15:33,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 08:15:33,583 INFO L93 Difference]: Finished difference Result 73 states and 85 transitions. [2023-02-18 08:15:33,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-18 08:15:33,594 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2023-02-18 08:15:33,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 08:15:33,600 INFO L225 Difference]: With dead ends: 73 [2023-02-18 08:15:33,601 INFO L226 Difference]: Without dead ends: 60 [2023-02-18 08:15:33,603 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-02-18 08:15:33,605 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 61 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 08:15:33,607 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [66 Valid, 107 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 08:15:33,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2023-02-18 08:15:33,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 51. [2023-02-18 08:15:33,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 34 states have (on average 1.5588235294117647) internal successors, (53), 42 states have internal predecessors, (53), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-02-18 08:15:33,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 66 transitions. [2023-02-18 08:15:33,651 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 66 transitions. Word has length 8 [2023-02-18 08:15:33,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 08:15:33,652 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 66 transitions. [2023-02-18 08:15:33,652 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 08:15:33,652 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 66 transitions. [2023-02-18 08:15:33,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2023-02-18 08:15:33,653 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 08:15:33,653 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 08:15:33,653 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-02-18 08:15:33,653 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2023-02-18 08:15:33,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 08:15:33,654 INFO L85 PathProgramCache]: Analyzing trace with hash 1308666490, now seen corresponding path program 1 times [2023-02-18 08:15:33,654 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 08:15:33,654 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [608997889] [2023-02-18 08:15:33,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 08:15:33,655 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 08:15:33,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 08:15:33,696 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 08:15:33,696 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 08:15:33,696 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [608997889] [2023-02-18 08:15:33,696 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [608997889] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 08:15:33,697 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 08:15:33,697 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-18 08:15:33,697 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1717085091] [2023-02-18 08:15:33,697 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 08:15:33,704 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-18 08:15:33,704 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 08:15:33,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-18 08:15:33,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-02-18 08:15:33,705 INFO L87 Difference]: Start difference. First operand 51 states and 66 transitions. Second operand has 5 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 08:15:33,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 08:15:33,798 INFO L93 Difference]: Finished difference Result 101 states and 139 transitions. [2023-02-18 08:15:33,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-18 08:15:33,799 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2023-02-18 08:15:33,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 08:15:33,800 INFO L225 Difference]: With dead ends: 101 [2023-02-18 08:15:33,800 INFO L226 Difference]: Without dead ends: 95 [2023-02-18 08:15:33,801 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-02-18 08:15:33,802 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 48 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 08:15:33,802 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 89 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 08:15:33,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2023-02-18 08:15:33,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 85. [2023-02-18 08:15:33,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 61 states have (on average 1.540983606557377) internal successors, (94), 70 states have internal predecessors, (94), 13 states have call successors, (13), 4 states have call predecessors, (13), 3 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2023-02-18 08:15:33,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 117 transitions. [2023-02-18 08:15:33,813 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 117 transitions. Word has length 9 [2023-02-18 08:15:33,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 08:15:33,813 INFO L495 AbstractCegarLoop]: Abstraction has 85 states and 117 transitions. [2023-02-18 08:15:33,814 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 08:15:33,814 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 117 transitions. [2023-02-18 08:15:33,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2023-02-18 08:15:33,814 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 08:15:33,814 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 08:15:33,814 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-02-18 08:15:33,815 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2023-02-18 08:15:33,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 08:15:33,815 INFO L85 PathProgramCache]: Analyzing trace with hash 1308661493, now seen corresponding path program 1 times [2023-02-18 08:15:33,816 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 08:15:33,816 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1603264562] [2023-02-18 08:15:33,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 08:15:33,816 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 08:15:33,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 08:15:33,863 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 08:15:33,864 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 08:15:33,864 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1603264562] [2023-02-18 08:15:33,864 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1603264562] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 08:15:33,864 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 08:15:33,864 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-18 08:15:33,865 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [910855537] [2023-02-18 08:15:33,865 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 08:15:33,865 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-18 08:15:33,865 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 08:15:33,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-18 08:15:33,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-02-18 08:15:33,866 INFO L87 Difference]: Start difference. First operand 85 states and 117 transitions. Second operand has 5 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 08:15:33,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 08:15:33,921 INFO L93 Difference]: Finished difference Result 114 states and 154 transitions. [2023-02-18 08:15:33,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-18 08:15:33,921 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2023-02-18 08:15:33,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 08:15:33,923 INFO L225 Difference]: With dead ends: 114 [2023-02-18 08:15:33,923 INFO L226 Difference]: Without dead ends: 110 [2023-02-18 08:15:33,924 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-02-18 08:15:33,925 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 [2023-02-18 08:15:33,925 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] [2023-02-18 08:15:33,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2023-02-18 08:15:33,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 102. [2023-02-18 08:15:33,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 74 states have (on average 1.472972972972973) internal successors, (109), 83 states have internal predecessors, (109), 16 states have call successors, (16), 5 states have call predecessors, (16), 4 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2023-02-18 08:15:33,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 138 transitions. [2023-02-18 08:15:33,937 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 138 transitions. Word has length 9 [2023-02-18 08:15:33,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 08:15:33,938 INFO L495 AbstractCegarLoop]: Abstraction has 102 states and 138 transitions. [2023-02-18 08:15:33,938 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 08:15:33,938 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 138 transitions. [2023-02-18 08:15:33,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-02-18 08:15:33,938 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 08:15:33,939 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 08:15:33,939 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-02-18 08:15:33,939 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ackermannErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2023-02-18 08:15:33,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 08:15:33,940 INFO L85 PathProgramCache]: Analyzing trace with hash 1913955596, now seen corresponding path program 1 times [2023-02-18 08:15:33,940 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 08:15:33,940 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1470342551] [2023-02-18 08:15:33,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 08:15:33,940 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 08:15:33,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 08:15:33,983 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 08:15:33,986 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 08:15:33,986 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1470342551] [2023-02-18 08:15:33,986 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1470342551] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 08:15:33,987 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 08:15:33,987 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-18 08:15:33,987 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [489743257] [2023-02-18 08:15:33,987 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 08:15:33,987 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-18 08:15:33,988 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 08:15:33,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-18 08:15:33,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-02-18 08:15:33,988 INFO L87 Difference]: Start difference. First operand 102 states and 138 transitions. Second operand has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 08:15:34,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 08:15:34,047 INFO L93 Difference]: Finished difference Result 102 states and 138 transitions. [2023-02-18 08:15:34,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-02-18 08:15:34,048 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2023-02-18 08:15:34,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 08:15:34,049 INFO L225 Difference]: With dead ends: 102 [2023-02-18 08:15:34,049 INFO L226 Difference]: Without dead ends: 100 [2023-02-18 08:15:34,050 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-02-18 08:15:34,051 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 [2023-02-18 08:15:34,051 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] [2023-02-18 08:15:34,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2023-02-18 08:15:34,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 100. [2023-02-18 08:15:34,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 74 states have (on average 1.337837837837838) internal successors, (99), 81 states have internal predecessors, (99), 16 states have call successors, (16), 5 states have call predecessors, (16), 4 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2023-02-18 08:15:34,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 128 transitions. [2023-02-18 08:15:34,067 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 128 transitions. Word has length 10 [2023-02-18 08:15:34,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 08:15:34,067 INFO L495 AbstractCegarLoop]: Abstraction has 100 states and 128 transitions. [2023-02-18 08:15:34,067 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 08:15:34,067 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 128 transitions. [2023-02-18 08:15:34,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-02-18 08:15:34,068 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 08:15:34,068 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 08:15:34,068 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-02-18 08:15:34,068 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ackermannErr6ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2023-02-18 08:15:34,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 08:15:34,069 INFO L85 PathProgramCache]: Analyzing trace with hash -796703108, now seen corresponding path program 1 times [2023-02-18 08:15:34,069 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 08:15:34,069 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [639577650] [2023-02-18 08:15:34,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 08:15:34,073 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 08:15:34,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 08:15:34,139 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 08:15:34,140 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 08:15:34,140 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [639577650] [2023-02-18 08:15:34,140 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [639577650] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 08:15:34,140 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 08:15:34,140 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-18 08:15:34,141 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1283856730] [2023-02-18 08:15:34,141 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 08:15:34,141 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-18 08:15:34,141 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 08:15:34,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-18 08:15:34,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-02-18 08:15:34,142 INFO L87 Difference]: Start difference. First operand 100 states and 128 transitions. Second operand has 5 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 08:15:34,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 08:15:34,184 INFO L93 Difference]: Finished difference Result 109 states and 140 transitions. [2023-02-18 08:15:34,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-18 08:15:34,184 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2023-02-18 08:15:34,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 08:15:34,186 INFO L225 Difference]: With dead ends: 109 [2023-02-18 08:15:34,194 INFO L226 Difference]: Without dead ends: 108 [2023-02-18 08:15:34,195 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-02-18 08:15:34,195 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 38 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-18 08:15:34,196 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 92 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 08:15:34,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2023-02-18 08:15:34,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 100. [2023-02-18 08:15:34,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 74 states have (on average 1.3108108108108107) internal successors, (97), 81 states have internal predecessors, (97), 16 states have call successors, (16), 5 states have call predecessors, (16), 4 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2023-02-18 08:15:34,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 126 transitions. [2023-02-18 08:15:34,205 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 126 transitions. Word has length 11 [2023-02-18 08:15:34,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 08:15:34,205 INFO L495 AbstractCegarLoop]: Abstraction has 100 states and 126 transitions. [2023-02-18 08:15:34,205 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 08:15:34,205 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 126 transitions. [2023-02-18 08:15:34,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-02-18 08:15:34,206 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 08:15:34,206 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 08:15:34,206 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-02-18 08:15:34,206 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2023-02-18 08:15:34,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 08:15:34,207 INFO L85 PathProgramCache]: Analyzing trace with hash 1669645175, now seen corresponding path program 1 times [2023-02-18 08:15:34,207 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 08:15:34,207 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [437971278] [2023-02-18 08:15:34,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 08:15:34,208 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 08:15:34,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 08:15:34,232 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 08:15:34,233 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 08:15:34,233 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [437971278] [2023-02-18 08:15:34,233 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [437971278] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 08:15:34,233 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 08:15:34,233 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-18 08:15:34,233 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [802086737] [2023-02-18 08:15:34,234 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 08:15:34,234 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-18 08:15:34,234 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 08:15:34,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-18 08:15:34,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-18 08:15:34,235 INFO L87 Difference]: Start difference. First operand 100 states and 126 transitions. Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 states have internal predecessors, (13), 1 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 08:15:34,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 08:15:34,265 INFO L93 Difference]: Finished difference Result 168 states and 221 transitions. [2023-02-18 08:15:34,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-18 08:15:34,266 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 states have internal predecessors, (13), 1 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2023-02-18 08:15:34,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 08:15:34,267 INFO L225 Difference]: With dead ends: 168 [2023-02-18 08:15:34,267 INFO L226 Difference]: Without dead ends: 97 [2023-02-18 08:15:34,269 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-02-18 08:15:34,271 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 26 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-18 08:15:34,276 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 88 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 08:15:34,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2023-02-18 08:15:34,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 96. [2023-02-18 08:15:34,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 71 states have (on average 1.295774647887324) internal successors, (92), 78 states have internal predecessors, (92), 15 states have call successors, (15), 5 states have call predecessors, (15), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2023-02-18 08:15:34,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 119 transitions. [2023-02-18 08:15:34,291 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 119 transitions. Word has length 15 [2023-02-18 08:15:34,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 08:15:34,292 INFO L495 AbstractCegarLoop]: Abstraction has 96 states and 119 transitions. [2023-02-18 08:15:34,292 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 states have internal predecessors, (13), 1 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 08:15:34,292 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 119 transitions. [2023-02-18 08:15:34,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-02-18 08:15:34,295 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 08:15:34,295 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 08:15:34,296 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-02-18 08:15:34,296 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ackermannErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2023-02-18 08:15:34,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 08:15:34,296 INFO L85 PathProgramCache]: Analyzing trace with hash 1669645399, now seen corresponding path program 1 times [2023-02-18 08:15:34,297 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 08:15:34,297 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1077377190] [2023-02-18 08:15:34,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 08:15:34,297 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 08:15:34,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 08:15:34,348 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 08:15:34,348 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 08:15:34,349 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1077377190] [2023-02-18 08:15:34,349 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1077377190] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 08:15:34,349 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [447589993] [2023-02-18 08:15:34,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 08:15:34,349 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 08:15:34,349 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 08:15:34,352 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 08:15:34,353 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-02-18 08:15:34,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 08:15:34,401 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 6 conjunts are in the unsatisfiable core [2023-02-18 08:15:34,403 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 08:15:34,442 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 08:15:34,442 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 08:15:34,480 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 08:15:34,481 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [447589993] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 08:15:34,481 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 08:15:34,481 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 11 [2023-02-18 08:15:34,481 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [598390492] [2023-02-18 08:15:34,481 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 08:15:34,483 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-02-18 08:15:34,483 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 08:15:34,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-02-18 08:15:34,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2023-02-18 08:15:34,484 INFO L87 Difference]: Start difference. First operand 96 states and 119 transitions. Second operand has 12 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 8 states have internal predecessors, (24), 4 states have call successors, (4), 4 states have call predecessors, (4), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 08:15:34,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 08:15:34,660 INFO L93 Difference]: Finished difference Result 274 states and 356 transitions. [2023-02-18 08:15:34,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-02-18 08:15:34,661 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 8 states have internal predecessors, (24), 4 states have call successors, (4), 4 states have call predecessors, (4), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2023-02-18 08:15:34,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 08:15:34,664 INFO L225 Difference]: With dead ends: 274 [2023-02-18 08:15:34,664 INFO L226 Difference]: Without dead ends: 272 [2023-02-18 08:15:34,665 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=104, Invalid=238, Unknown=0, NotChecked=0, Total=342 [2023-02-18 08:15:34,665 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 249 mSDsluCounter, 134 mSDsCounter, 0 mSdLazyCounter, 148 mSolverCounterSat, 97 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 255 SdHoareTripleChecker+Valid, 163 SdHoareTripleChecker+Invalid, 245 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 148 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 08:15:34,665 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [255 Valid, 163 Invalid, 245 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 148 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 08:15:34,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2023-02-18 08:15:34,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 236. [2023-02-18 08:15:34,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 236 states, 182 states have (on average 1.2637362637362637) internal successors, (230), 189 states have internal predecessors, (230), 36 states have call successors, (36), 13 states have call predecessors, (36), 12 states have return successors, (33), 33 states have call predecessors, (33), 33 states have call successors, (33) [2023-02-18 08:15:34,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 299 transitions. [2023-02-18 08:15:34,682 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 299 transitions. Word has length 15 [2023-02-18 08:15:34,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 08:15:34,682 INFO L495 AbstractCegarLoop]: Abstraction has 236 states and 299 transitions. [2023-02-18 08:15:34,682 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 8 states have internal predecessors, (24), 4 states have call successors, (4), 4 states have call predecessors, (4), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 08:15:34,682 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 299 transitions. [2023-02-18 08:15:34,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-02-18 08:15:34,683 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 08:15:34,683 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 08:15:34,690 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-02-18 08:15:34,888 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 08:15:34,889 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2023-02-18 08:15:34,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 08:15:34,890 INFO L85 PathProgramCache]: Analyzing trace with hash 1422985811, now seen corresponding path program 1 times [2023-02-18 08:15:34,890 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 08:15:34,890 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1574320119] [2023-02-18 08:15:34,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 08:15:34,890 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 08:15:34,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 08:15:34,960 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 08:15:34,961 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 08:15:34,961 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1574320119] [2023-02-18 08:15:34,961 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1574320119] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 08:15:34,961 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2076520756] [2023-02-18 08:15:34,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 08:15:34,961 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 08:15:34,961 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 08:15:34,963 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 08:15:34,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 08:15:34,996 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-02-18 08:15:34,997 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 4 conjunts are in the unsatisfiable core [2023-02-18 08:15:34,998 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 08:15:35,020 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 08:15:35,020 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-18 08:15:35,021 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2076520756] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 08:15:35,021 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-02-18 08:15:35,021 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 9 [2023-02-18 08:15:35,021 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1304434519] [2023-02-18 08:15:35,024 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 08:15:35,025 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-18 08:15:35,025 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 08:15:35,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-18 08:15:35,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2023-02-18 08:15:35,025 INFO L87 Difference]: Start difference. First operand 236 states and 299 transitions. Second operand has 5 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 08:15:35,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 08:15:35,078 INFO L93 Difference]: Finished difference Result 328 states and 437 transitions. [2023-02-18 08:15:35,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-18 08:15:35,078 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2023-02-18 08:15:35,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 08:15:35,080 INFO L225 Difference]: With dead ends: 328 [2023-02-18 08:15:35,080 INFO L226 Difference]: Without dead ends: 327 [2023-02-18 08:15:35,081 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2023-02-18 08:15:35,088 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 41 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-18 08:15:35,089 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 96 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 08:15:35,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 327 states. [2023-02-18 08:15:35,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 327 to 293. [2023-02-18 08:15:35,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 293 states, 227 states have (on average 1.2599118942731278) internal successors, (286), 234 states have internal predecessors, (286), 45 states have call successors, (45), 16 states have call predecessors, (45), 15 states have return successors, (42), 42 states have call predecessors, (42), 42 states have call successors, (42) [2023-02-18 08:15:35,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 373 transitions. [2023-02-18 08:15:35,112 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 373 transitions. Word has length 16 [2023-02-18 08:15:35,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 08:15:35,113 INFO L495 AbstractCegarLoop]: Abstraction has 293 states and 373 transitions. [2023-02-18 08:15:35,113 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 08:15:35,113 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 373 transitions. [2023-02-18 08:15:35,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-02-18 08:15:35,114 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 08:15:35,114 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 08:15:35,119 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-02-18 08:15:35,317 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2023-02-18 08:15:35,317 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ackermannErr6ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2023-02-18 08:15:35,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 08:15:35,318 INFO L85 PathProgramCache]: Analyzing trace with hash 848163410, now seen corresponding path program 1 times [2023-02-18 08:15:35,318 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 08:15:35,318 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1641451263] [2023-02-18 08:15:35,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 08:15:35,318 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 08:15:35,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 08:15:35,378 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 08:15:35,378 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 08:15:35,378 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1641451263] [2023-02-18 08:15:35,378 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1641451263] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 08:15:35,379 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [237430594] [2023-02-18 08:15:35,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 08:15:35,379 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 08:15:35,379 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 08:15:35,380 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 08:15:35,382 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-02-18 08:15:35,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 08:15:35,407 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 6 conjunts are in the unsatisfiable core [2023-02-18 08:15:35,407 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 08:15:35,417 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 08:15:35,417 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 08:15:35,440 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 08:15:35,441 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [237430594] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 08:15:35,441 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 08:15:35,441 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 11 [2023-02-18 08:15:35,441 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1830376070] [2023-02-18 08:15:35,441 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 08:15:35,442 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-02-18 08:15:35,442 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 08:15:35,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-02-18 08:15:35,442 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2023-02-18 08:15:35,442 INFO L87 Difference]: Start difference. First operand 293 states and 373 transitions. Second operand has 12 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 8 states have internal predecessors, (31), 4 states have call successors, (4), 4 states have call predecessors, (4), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 08:15:35,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 08:15:35,598 INFO L93 Difference]: Finished difference Result 591 states and 792 transitions. [2023-02-18 08:15:35,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-02-18 08:15:35,598 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 8 states have internal predecessors, (31), 4 states have call successors, (4), 4 states have call predecessors, (4), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2023-02-18 08:15:35,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 08:15:35,603 INFO L225 Difference]: With dead ends: 591 [2023-02-18 08:15:35,603 INFO L226 Difference]: Without dead ends: 590 [2023-02-18 08:15:35,604 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=104, Invalid=238, Unknown=0, NotChecked=0, Total=342 [2023-02-18 08:15:35,605 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 156 mSDsluCounter, 171 mSDsCounter, 0 mSdLazyCounter, 160 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 159 SdHoareTripleChecker+Valid, 203 SdHoareTripleChecker+Invalid, 217 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 160 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 08:15:35,605 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [159 Valid, 203 Invalid, 217 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 160 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 08:15:35,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 590 states. [2023-02-18 08:15:35,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 590 to 521. [2023-02-18 08:15:35,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 521 states, 407 states have (on average 1.203931203931204) internal successors, (490), 414 states have internal predecessors, (490), 81 states have call successors, (81), 28 states have call predecessors, (81), 27 states have return successors, (78), 78 states have call predecessors, (78), 78 states have call successors, (78) [2023-02-18 08:15:35,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 521 states to 521 states and 649 transitions. [2023-02-18 08:15:35,637 INFO L78 Accepts]: Start accepts. Automaton has 521 states and 649 transitions. Word has length 19 [2023-02-18 08:15:35,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 08:15:35,637 INFO L495 AbstractCegarLoop]: Abstraction has 521 states and 649 transitions. [2023-02-18 08:15:35,637 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 8 states have internal predecessors, (31), 4 states have call successors, (4), 4 states have call predecessors, (4), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 08:15:35,637 INFO L276 IsEmpty]: Start isEmpty. Operand 521 states and 649 transitions. [2023-02-18 08:15:35,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-02-18 08:15:35,638 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 08:15:35,638 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 08:15:35,644 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-02-18 08:15:35,842 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 08:15:35,842 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2023-02-18 08:15:35,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 08:15:35,843 INFO L85 PathProgramCache]: Analyzing trace with hash 1106403678, now seen corresponding path program 1 times [2023-02-18 08:15:35,843 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 08:15:35,843 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [81755010] [2023-02-18 08:15:35,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 08:15:35,843 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 08:15:35,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 08:15:35,866 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-02-18 08:15:35,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 08:15:35,878 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-18 08:15:35,878 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 08:15:35,878 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [81755010] [2023-02-18 08:15:35,878 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [81755010] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 08:15:35,878 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1320922176] [2023-02-18 08:15:35,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 08:15:35,879 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 08:15:35,879 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 08:15:35,880 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 08:15:35,882 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-02-18 08:15:35,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 08:15:35,909 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 4 conjunts are in the unsatisfiable core [2023-02-18 08:15:35,909 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 08:15:35,929 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-18 08:15:35,929 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-18 08:15:35,929 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1320922176] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 08:15:35,929 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-02-18 08:15:35,929 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 10 [2023-02-18 08:15:35,929 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [972169262] [2023-02-18 08:15:35,929 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 08:15:35,930 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-18 08:15:35,930 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 08:15:35,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-18 08:15:35,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2023-02-18 08:15:35,933 INFO L87 Difference]: Start difference. First operand 521 states and 649 transitions. Second operand has 5 states, 3 states have (on average 6.333333333333333) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-18 08:15:35,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 08:15:35,986 INFO L93 Difference]: Finished difference Result 562 states and 696 transitions. [2023-02-18 08:15:35,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-02-18 08:15:35,987 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 3 states have (on average 6.333333333333333) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 24 [2023-02-18 08:15:35,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 08:15:35,989 INFO L225 Difference]: With dead ends: 562 [2023-02-18 08:15:35,989 INFO L226 Difference]: Without dead ends: 561 [2023-02-18 08:15:35,989 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2023-02-18 08:15:35,990 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 43 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-18 08:15:35,990 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 98 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 08:15:35,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 561 states. [2023-02-18 08:15:36,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 561 to 520. [2023-02-18 08:15:36,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 520 states, 407 states have (on average 1.194103194103194) internal successors, (486), 413 states have internal predecessors, (486), 81 states have call successors, (81), 28 states have call predecessors, (81), 27 states have return successors, (78), 78 states have call predecessors, (78), 78 states have call successors, (78) [2023-02-18 08:15:36,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 520 states to 520 states and 645 transitions. [2023-02-18 08:15:36,006 INFO L78 Accepts]: Start accepts. Automaton has 520 states and 645 transitions. Word has length 24 [2023-02-18 08:15:36,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 08:15:36,006 INFO L495 AbstractCegarLoop]: Abstraction has 520 states and 645 transitions. [2023-02-18 08:15:36,006 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 3 states have (on average 6.333333333333333) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-18 08:15:36,006 INFO L276 IsEmpty]: Start isEmpty. Operand 520 states and 645 transitions. [2023-02-18 08:15:36,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-02-18 08:15:36,007 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 08:15:36,007 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 08:15:36,013 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-02-18 08:15:36,211 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 08:15:36,212 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2023-02-18 08:15:36,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 08:15:36,212 INFO L85 PathProgramCache]: Analyzing trace with hash -61224288, now seen corresponding path program 1 times [2023-02-18 08:15:36,212 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 08:15:36,212 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [169662947] [2023-02-18 08:15:36,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 08:15:36,213 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 08:15:36,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 08:15:36,249 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-02-18 08:15:36,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 08:15:36,262 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-18 08:15:36,262 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 08:15:36,262 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [169662947] [2023-02-18 08:15:36,262 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [169662947] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 08:15:36,263 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1332187712] [2023-02-18 08:15:36,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 08:15:36,263 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 08:15:36,263 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 08:15:36,264 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 08:15:36,266 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-02-18 08:15:36,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 08:15:36,295 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 10 conjunts are in the unsatisfiable core [2023-02-18 08:15:36,296 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 08:15:36,332 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-18 08:15:36,332 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 08:15:36,417 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-18 08:15:36,417 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1332187712] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 08:15:36,417 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 08:15:36,417 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 19 [2023-02-18 08:15:36,419 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [797510072] [2023-02-18 08:15:36,419 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 08:15:36,420 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-02-18 08:15:36,420 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 08:15:36,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-02-18 08:15:36,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=299, Unknown=0, NotChecked=0, Total=342 [2023-02-18 08:15:36,421 INFO L87 Difference]: Start difference. First operand 520 states and 645 transitions. Second operand has 19 states, 17 states have (on average 3.235294117647059) internal successors, (55), 16 states have internal predecessors, (55), 8 states have call successors, (9), 4 states have call predecessors, (9), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-18 08:15:36,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 08:15:36,721 INFO L93 Difference]: Finished difference Result 1284 states and 1790 transitions. [2023-02-18 08:15:36,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-02-18 08:15:36,722 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 17 states have (on average 3.235294117647059) internal successors, (55), 16 states have internal predecessors, (55), 8 states have call successors, (9), 4 states have call predecessors, (9), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 25 [2023-02-18 08:15:36,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 08:15:36,725 INFO L225 Difference]: With dead ends: 1284 [2023-02-18 08:15:36,725 INFO L226 Difference]: Without dead ends: 894 [2023-02-18 08:15:36,728 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 42 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=218, Invalid=904, Unknown=0, NotChecked=0, Total=1122 [2023-02-18 08:15:36,729 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 250 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 466 mSolverCounterSat, 94 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 250 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 560 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 466 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-18 08:15:36,729 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [250 Valid, 91 Invalid, 560 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [94 Valid, 466 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-18 08:15:36,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 894 states. [2023-02-18 08:15:36,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 894 to 694. [2023-02-18 08:15:36,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 694 states, 541 states have (on average 1.1903881700554528) internal successors, (644), 564 states have internal predecessors, (644), 102 states have call successors, (102), 44 states have call predecessors, (102), 46 states have return successors, (106), 85 states have call predecessors, (106), 78 states have call successors, (106) [2023-02-18 08:15:36,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 694 states to 694 states and 852 transitions. [2023-02-18 08:15:36,756 INFO L78 Accepts]: Start accepts. Automaton has 694 states and 852 transitions. Word has length 25 [2023-02-18 08:15:36,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 08:15:36,756 INFO L495 AbstractCegarLoop]: Abstraction has 694 states and 852 transitions. [2023-02-18 08:15:36,756 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 17 states have (on average 3.235294117647059) internal successors, (55), 16 states have internal predecessors, (55), 8 states have call successors, (9), 4 states have call predecessors, (9), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-18 08:15:36,757 INFO L276 IsEmpty]: Start isEmpty. Operand 694 states and 852 transitions. [2023-02-18 08:15:36,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-02-18 08:15:36,757 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 08:15:36,757 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 08:15:36,764 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-02-18 08:15:36,965 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-02-18 08:15:36,965 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ackermannErr6ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2023-02-18 08:15:36,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 08:15:36,966 INFO L85 PathProgramCache]: Analyzing trace with hash 1298021223, now seen corresponding path program 1 times [2023-02-18 08:15:36,966 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 08:15:36,966 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1499435138] [2023-02-18 08:15:36,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 08:15:36,966 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 08:15:36,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 08:15:37,030 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-02-18 08:15:37,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 08:15:37,052 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-02-18 08:15:37,053 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 08:15:37,053 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1499435138] [2023-02-18 08:15:37,053 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1499435138] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 08:15:37,053 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [154255652] [2023-02-18 08:15:37,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 08:15:37,053 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 08:15:37,053 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 08:15:37,054 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 08:15:37,056 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-02-18 08:15:37,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 08:15:37,084 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 8 conjunts are in the unsatisfiable core [2023-02-18 08:15:37,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 08:15:37,131 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-18 08:15:37,131 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 08:15:37,170 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-18 08:15:37,171 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [154255652] provided 1 perfect and 1 imperfect interpolant sequences [2023-02-18 08:15:37,171 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-02-18 08:15:37,171 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 6] total 13 [2023-02-18 08:15:37,171 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1467329682] [2023-02-18 08:15:37,171 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 08:15:37,171 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-02-18 08:15:37,171 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 08:15:37,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-02-18 08:15:37,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2023-02-18 08:15:37,172 INFO L87 Difference]: Start difference. First operand 694 states and 852 transitions. Second operand has 7 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 states have internal predecessors, (23), 3 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-18 08:15:37,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 08:15:37,265 INFO L93 Difference]: Finished difference Result 769 states and 977 transitions. [2023-02-18 08:15:37,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-02-18 08:15:37,265 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 states have internal predecessors, (23), 3 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 27 [2023-02-18 08:15:37,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 08:15:37,268 INFO L225 Difference]: With dead ends: 769 [2023-02-18 08:15:37,268 INFO L226 Difference]: Without dead ends: 768 [2023-02-18 08:15:37,268 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 47 SyntacticMatches, 5 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2023-02-18 08:15:37,269 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 46 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 121 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 08:15:37,269 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 107 Invalid, 132 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 121 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 08:15:37,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 768 states. [2023-02-18 08:15:37,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 768 to 712. [2023-02-18 08:15:37,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 712 states, 559 states have (on average 1.1896243291592128) internal successors, (665), 579 states have internal predecessors, (665), 102 states have call successors, (102), 47 states have call predecessors, (102), 46 states have return successors, (106), 85 states have call predecessors, (106), 78 states have call successors, (106) [2023-02-18 08:15:37,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 712 states to 712 states and 873 transitions. [2023-02-18 08:15:37,292 INFO L78 Accepts]: Start accepts. Automaton has 712 states and 873 transitions. Word has length 27 [2023-02-18 08:15:37,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 08:15:37,292 INFO L495 AbstractCegarLoop]: Abstraction has 712 states and 873 transitions. [2023-02-18 08:15:37,292 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 states have internal predecessors, (23), 3 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-18 08:15:37,292 INFO L276 IsEmpty]: Start isEmpty. Operand 712 states and 873 transitions. [2023-02-18 08:15:37,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2023-02-18 08:15:37,293 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 08:15:37,293 INFO L195 NwaCegarLoop]: trace histogram [4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 08:15:37,299 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-02-18 08:15:37,499 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 08:15:37,500 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2023-02-18 08:15:37,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 08:15:37,500 INFO L85 PathProgramCache]: Analyzing trace with hash -722353775, now seen corresponding path program 1 times [2023-02-18 08:15:37,500 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 08:15:37,500 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1529077870] [2023-02-18 08:15:37,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 08:15:37,500 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 08:15:37,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 08:15:37,533 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-02-18 08:15:37,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 08:15:37,552 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-02-18 08:15:37,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 08:15:37,567 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-02-18 08:15:37,568 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 08:15:37,568 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1529077870] [2023-02-18 08:15:37,568 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1529077870] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 08:15:37,568 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [440801853] [2023-02-18 08:15:37,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 08:15:37,568 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 08:15:37,568 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 08:15:37,569 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 08:15:37,571 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-02-18 08:15:37,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 08:15:37,600 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 9 conjunts are in the unsatisfiable core [2023-02-18 08:15:37,602 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 08:15:37,619 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-02-18 08:15:37,619 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 08:15:37,682 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-02-18 08:15:37,683 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [440801853] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 08:15:37,683 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 08:15:37,683 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2023-02-18 08:15:37,683 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1132278284] [2023-02-18 08:15:37,683 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 08:15:37,684 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-02-18 08:15:37,684 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 08:15:37,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-02-18 08:15:37,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2023-02-18 08:15:37,685 INFO L87 Difference]: Start difference. First operand 712 states and 873 transitions. Second operand has 18 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 14 states have internal predecessors, (43), 3 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (5), 4 states have call predecessors, (5), 1 states have call successors, (5) [2023-02-18 08:15:37,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 08:15:37,974 INFO L93 Difference]: Finished difference Result 1137 states and 1677 transitions. [2023-02-18 08:15:37,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-02-18 08:15:37,975 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 14 states have internal predecessors, (43), 3 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (5), 4 states have call predecessors, (5), 1 states have call successors, (5) Word has length 34 [2023-02-18 08:15:37,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 08:15:37,980 INFO L225 Difference]: With dead ends: 1137 [2023-02-18 08:15:37,980 INFO L226 Difference]: Without dead ends: 1135 [2023-02-18 08:15:37,981 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 62 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=188, Invalid=682, Unknown=0, NotChecked=0, Total=870 [2023-02-18 08:15:37,981 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 155 mSDsluCounter, 170 mSDsCounter, 0 mSdLazyCounter, 352 mSolverCounterSat, 141 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 155 SdHoareTripleChecker+Valid, 196 SdHoareTripleChecker+Invalid, 493 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 141 IncrementalHoareTripleChecker+Valid, 352 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-18 08:15:37,981 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [155 Valid, 196 Invalid, 493 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [141 Valid, 352 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-18 08:15:37,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1135 states. [2023-02-18 08:15:38,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1135 to 966. [2023-02-18 08:15:38,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 966 states, 727 states have (on average 1.1760660247592847) internal successors, (855), 758 states have internal predecessors, (855), 151 states have call successors, (151), 54 states have call predecessors, (151), 83 states have return successors, (294), 153 states have call predecessors, (294), 126 states have call successors, (294) [2023-02-18 08:15:38,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 966 states to 966 states and 1300 transitions. [2023-02-18 08:15:38,024 INFO L78 Accepts]: Start accepts. Automaton has 966 states and 1300 transitions. Word has length 34 [2023-02-18 08:15:38,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 08:15:38,024 INFO L495 AbstractCegarLoop]: Abstraction has 966 states and 1300 transitions. [2023-02-18 08:15:38,024 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 14 states have internal predecessors, (43), 3 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (5), 4 states have call predecessors, (5), 1 states have call successors, (5) [2023-02-18 08:15:38,024 INFO L276 IsEmpty]: Start isEmpty. Operand 966 states and 1300 transitions. [2023-02-18 08:15:38,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2023-02-18 08:15:38,025 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 08:15:38,025 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 08:15:38,045 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-02-18 08:15:38,229 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 08:15:38,229 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ackermannErr6ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2023-02-18 08:15:38,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 08:15:38,230 INFO L85 PathProgramCache]: Analyzing trace with hash -1979265987, now seen corresponding path program 2 times [2023-02-18 08:15:38,230 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 08:15:38,230 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [25395663] [2023-02-18 08:15:38,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 08:15:38,230 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 08:15:38,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 08:15:38,274 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-02-18 08:15:38,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 08:15:38,289 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-02-18 08:15:38,289 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 08:15:38,289 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [25395663] [2023-02-18 08:15:38,289 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [25395663] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 08:15:38,290 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1269660972] [2023-02-18 08:15:38,290 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-18 08:15:38,290 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 08:15:38,290 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 08:15:38,291 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 08:15:38,293 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-02-18 08:15:38,321 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-18 08:15:38,321 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 08:15:38,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 12 conjunts are in the unsatisfiable core [2023-02-18 08:15:38,322 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 08:15:38,336 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-02-18 08:15:38,336 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 08:15:38,393 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 4 proven. 14 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-02-18 08:15:38,394 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1269660972] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 08:15:38,394 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 08:15:38,394 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2023-02-18 08:15:38,394 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [158348294] [2023-02-18 08:15:38,394 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 08:15:38,394 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-02-18 08:15:38,394 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 08:15:38,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-02-18 08:15:38,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2023-02-18 08:15:38,395 INFO L87 Difference]: Start difference. First operand 966 states and 1300 transitions. Second operand has 19 states, 16 states have (on average 2.9375) internal successors, (47), 15 states have internal predecessors, (47), 6 states have call successors, (8), 5 states have call predecessors, (8), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-18 08:15:38,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 08:15:38,621 INFO L93 Difference]: Finished difference Result 1163 states and 1554 transitions. [2023-02-18 08:15:38,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-02-18 08:15:38,621 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 16 states have (on average 2.9375) internal successors, (47), 15 states have internal predecessors, (47), 6 states have call successors, (8), 5 states have call predecessors, (8), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 35 [2023-02-18 08:15:38,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 08:15:38,625 INFO L225 Difference]: With dead ends: 1163 [2023-02-18 08:15:38,625 INFO L226 Difference]: Without dead ends: 1162 [2023-02-18 08:15:38,626 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 61 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=238, Invalid=754, Unknown=0, NotChecked=0, Total=992 [2023-02-18 08:15:38,626 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 254 mSDsluCounter, 126 mSDsCounter, 0 mSdLazyCounter, 214 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 254 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 297 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 214 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 08:15:38,627 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [254 Valid, 146 Invalid, 297 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 214 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 08:15:38,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1162 states. [2023-02-18 08:15:38,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1162 to 1019. [2023-02-18 08:15:38,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1019 states, 769 states have (on average 1.1768530559167751) internal successors, (905), 796 states have internal predecessors, (905), 162 states have call successors, (162), 61 states have call predecessors, (162), 83 states have return successors, (294), 161 states have call predecessors, (294), 126 states have call successors, (294) [2023-02-18 08:15:38,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1019 states to 1019 states and 1361 transitions. [2023-02-18 08:15:38,668 INFO L78 Accepts]: Start accepts. Automaton has 1019 states and 1361 transitions. Word has length 35 [2023-02-18 08:15:38,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 08:15:38,669 INFO L495 AbstractCegarLoop]: Abstraction has 1019 states and 1361 transitions. [2023-02-18 08:15:38,669 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 16 states have (on average 2.9375) internal successors, (47), 15 states have internal predecessors, (47), 6 states have call successors, (8), 5 states have call predecessors, (8), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-18 08:15:38,669 INFO L276 IsEmpty]: Start isEmpty. Operand 1019 states and 1361 transitions. [2023-02-18 08:15:38,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2023-02-18 08:15:38,669 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 08:15:38,670 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 08:15:38,676 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-02-18 08:15:38,874 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-02-18 08:15:38,874 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ackermannErr6ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2023-02-18 08:15:38,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 08:15:38,875 INFO L85 PathProgramCache]: Analyzing trace with hash 1607744024, now seen corresponding path program 1 times [2023-02-18 08:15:38,875 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 08:15:38,875 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [401901100] [2023-02-18 08:15:38,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 08:15:38,875 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 08:15:38,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 08:15:38,912 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-02-18 08:15:38,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 08:15:38,928 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-02-18 08:15:38,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 08:15:38,946 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 14 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-02-18 08:15:38,947 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 08:15:38,947 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [401901100] [2023-02-18 08:15:38,947 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [401901100] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 08:15:38,947 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [842532761] [2023-02-18 08:15:38,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 08:15:38,947 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 08:15:38,947 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 08:15:38,948 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 08:15:38,951 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-02-18 08:15:38,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 08:15:38,993 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 9 conjunts are in the unsatisfiable core [2023-02-18 08:15:38,995 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 08:15:39,023 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 12 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-02-18 08:15:39,024 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 08:15:39,102 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-02-18 08:15:39,103 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [842532761] provided 1 perfect and 1 imperfect interpolant sequences [2023-02-18 08:15:39,103 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-02-18 08:15:39,103 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8, 8] total 17 [2023-02-18 08:15:39,103 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [538133293] [2023-02-18 08:15:39,103 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 08:15:39,103 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-02-18 08:15:39,104 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 08:15:39,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-02-18 08:15:39,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2023-02-18 08:15:39,104 INFO L87 Difference]: Start difference. First operand 1019 states and 1361 transitions. Second operand has 9 states, 8 states have (on average 3.5) internal successors, (28), 7 states have internal predecessors, (28), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-18 08:15:39,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 08:15:39,268 INFO L93 Difference]: Finished difference Result 1129 states and 1564 transitions. [2023-02-18 08:15:39,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-02-18 08:15:39,268 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 3.5) internal successors, (28), 7 states have internal predecessors, (28), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 36 [2023-02-18 08:15:39,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 08:15:39,272 INFO L225 Difference]: With dead ends: 1129 [2023-02-18 08:15:39,272 INFO L226 Difference]: Without dead ends: 1128 [2023-02-18 08:15:39,274 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 60 SyntacticMatches, 6 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=100, Invalid=550, Unknown=0, NotChecked=0, Total=650 [2023-02-18 08:15:39,274 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 50 mSDsluCounter, 133 mSDsCounter, 0 mSdLazyCounter, 205 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 166 SdHoareTripleChecker+Invalid, 232 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 205 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 08:15:39,275 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 166 Invalid, 232 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 205 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 08:15:39,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1128 states. [2023-02-18 08:15:39,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1128 to 1027. [2023-02-18 08:15:39,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1027 states, 777 states have (on average 1.1711711711711712) internal successors, (910), 800 states have internal predecessors, (910), 166 states have call successors, (166), 61 states have call predecessors, (166), 79 states have return successors, (234), 165 states have call predecessors, (234), 130 states have call successors, (234) [2023-02-18 08:15:39,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1027 states to 1027 states and 1310 transitions. [2023-02-18 08:15:39,323 INFO L78 Accepts]: Start accepts. Automaton has 1027 states and 1310 transitions. Word has length 36 [2023-02-18 08:15:39,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 08:15:39,323 INFO L495 AbstractCegarLoop]: Abstraction has 1027 states and 1310 transitions. [2023-02-18 08:15:39,324 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 3.5) internal successors, (28), 7 states have internal predecessors, (28), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-18 08:15:39,324 INFO L276 IsEmpty]: Start isEmpty. Operand 1027 states and 1310 transitions. [2023-02-18 08:15:39,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-02-18 08:15:39,325 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 08:15:39,325 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1] [2023-02-18 08:15:39,331 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-02-18 08:15:39,529 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-02-18 08:15:39,530 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ackermannErr6ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2023-02-18 08:15:39,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 08:15:39,530 INFO L85 PathProgramCache]: Analyzing trace with hash -1390366252, now seen corresponding path program 2 times [2023-02-18 08:15:39,530 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 08:15:39,531 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [780864811] [2023-02-18 08:15:39,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 08:15:39,531 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 08:15:39,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 08:15:39,611 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 08:15:39,612 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 08:15:39,612 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [780864811] [2023-02-18 08:15:39,612 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [780864811] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 08:15:39,612 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2073627916] [2023-02-18 08:15:39,612 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-18 08:15:39,612 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 08:15:39,612 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 08:15:39,613 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 08:15:39,616 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-02-18 08:15:39,645 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-18 08:15:39,646 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 08:15:39,646 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 12 conjunts are in the unsatisfiable core [2023-02-18 08:15:39,649 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 08:15:39,686 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 08:15:39,686 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 08:15:39,779 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 08:15:39,779 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2073627916] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 08:15:39,779 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 08:15:39,779 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 23 [2023-02-18 08:15:39,779 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [205785344] [2023-02-18 08:15:39,779 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 08:15:39,780 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-02-18 08:15:39,780 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 08:15:39,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-02-18 08:15:39,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=416, Unknown=0, NotChecked=0, Total=552 [2023-02-18 08:15:39,781 INFO L87 Difference]: Start difference. First operand 1027 states and 1310 transitions. Second operand has 24 states, 21 states have (on average 3.4761904761904763) internal successors, (73), 14 states have internal predecessors, (73), 10 states have call successors, (10), 10 states have call predecessors, (10), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 08:15:40,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 08:15:40,180 INFO L93 Difference]: Finished difference Result 2044 states and 2749 transitions. [2023-02-18 08:15:40,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2023-02-18 08:15:40,180 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 21 states have (on average 3.4761904761904763) internal successors, (73), 14 states have internal predecessors, (73), 10 states have call successors, (10), 10 states have call predecessors, (10), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2023-02-18 08:15:40,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 08:15:40,187 INFO L225 Difference]: With dead ends: 2044 [2023-02-18 08:15:40,187 INFO L226 Difference]: Without dead ends: 2043 [2023-02-18 08:15:40,189 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 67 SyntacticMatches, 8 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 376 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=554, Invalid=1252, Unknown=0, NotChecked=0, Total=1806 [2023-02-18 08:15:40,189 INFO L413 NwaCegarLoop]: 46 mSDtfsCounter, 430 mSDsluCounter, 405 mSDsCounter, 0 mSdLazyCounter, 570 mSolverCounterSat, 119 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 433 SdHoareTripleChecker+Valid, 451 SdHoareTripleChecker+Invalid, 689 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 119 IncrementalHoareTripleChecker+Valid, 570 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-18 08:15:40,189 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [433 Valid, 451 Invalid, 689 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [119 Valid, 570 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-18 08:15:40,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2043 states. [2023-02-18 08:15:40,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2043 to 1748. [2023-02-18 08:15:40,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1748 states, 1315 states have (on average 1.1460076045627376) internal successors, (1507), 1367 states have internal predecessors, (1507), 274 states have call successors, (274), 95 states have call predecessors, (274), 154 states have return successors, (409), 285 states have call predecessors, (409), 226 states have call successors, (409) [2023-02-18 08:15:40,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1748 states to 1748 states and 2190 transitions. [2023-02-18 08:15:40,266 INFO L78 Accepts]: Start accepts. Automaton has 1748 states and 2190 transitions. Word has length 43 [2023-02-18 08:15:40,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 08:15:40,266 INFO L495 AbstractCegarLoop]: Abstraction has 1748 states and 2190 transitions. [2023-02-18 08:15:40,266 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 21 states have (on average 3.4761904761904763) internal successors, (73), 14 states have internal predecessors, (73), 10 states have call successors, (10), 10 states have call predecessors, (10), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 08:15:40,266 INFO L276 IsEmpty]: Start isEmpty. Operand 1748 states and 2190 transitions. [2023-02-18 08:15:40,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2023-02-18 08:15:40,267 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 08:15:40,267 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 08:15:40,274 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-02-18 08:15:40,470 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-02-18 08:15:40,470 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ackermannErr6ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2023-02-18 08:15:40,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 08:15:40,471 INFO L85 PathProgramCache]: Analyzing trace with hash -1058043410, now seen corresponding path program 2 times [2023-02-18 08:15:40,471 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 08:15:40,471 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [507777803] [2023-02-18 08:15:40,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 08:15:40,471 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 08:15:40,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 08:15:40,512 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-02-18 08:15:40,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 08:15:40,532 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-02-18 08:15:40,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 08:15:40,547 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 26 proven. 8 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-02-18 08:15:40,547 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 08:15:40,547 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [507777803] [2023-02-18 08:15:40,547 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [507777803] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 08:15:40,547 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1143988680] [2023-02-18 08:15:40,547 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-18 08:15:40,547 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 08:15:40,548 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 08:15:40,548 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 08:15:40,550 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-02-18 08:15:40,584 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-18 08:15:40,584 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 08:15:40,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 11 conjunts are in the unsatisfiable core [2023-02-18 08:15:40,586 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 08:15:40,618 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 24 proven. 10 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-02-18 08:15:40,618 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 08:15:40,685 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 28 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-02-18 08:15:40,686 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1143988680] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 08:15:40,686 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 08:15:40,686 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 21 [2023-02-18 08:15:40,686 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1039210002] [2023-02-18 08:15:40,686 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 08:15:40,687 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-02-18 08:15:40,687 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 08:15:40,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-02-18 08:15:40,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2023-02-18 08:15:40,687 INFO L87 Difference]: Start difference. First operand 1748 states and 2190 transitions. Second operand has 22 states, 21 states have (on average 2.9047619047619047) internal successors, (61), 16 states have internal predecessors, (61), 5 states have call successors, (7), 5 states have call predecessors, (7), 5 states have return successors, (5), 4 states have call predecessors, (5), 1 states have call successors, (5) [2023-02-18 08:15:41,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 08:15:41,336 INFO L93 Difference]: Finished difference Result 3771 states and 5462 transitions. [2023-02-18 08:15:41,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-02-18 08:15:41,337 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 2.9047619047619047) internal successors, (61), 16 states have internal predecessors, (61), 5 states have call successors, (7), 5 states have call predecessors, (7), 5 states have return successors, (5), 4 states have call predecessors, (5), 1 states have call successors, (5) Word has length 44 [2023-02-18 08:15:41,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 08:15:41,345 INFO L225 Difference]: With dead ends: 3771 [2023-02-18 08:15:41,345 INFO L226 Difference]: Without dead ends: 2618 [2023-02-18 08:15:41,351 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 78 SyntacticMatches, 8 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 497 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=582, Invalid=1968, Unknown=0, NotChecked=0, Total=2550 [2023-02-18 08:15:41,351 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 235 mSDsluCounter, 255 mSDsCounter, 0 mSdLazyCounter, 613 mSolverCounterSat, 309 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 235 SdHoareTripleChecker+Valid, 291 SdHoareTripleChecker+Invalid, 922 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 309 IncrementalHoareTripleChecker+Valid, 613 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-18 08:15:41,351 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [235 Valid, 291 Invalid, 922 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [309 Valid, 613 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-18 08:15:41,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2618 states. [2023-02-18 08:15:41,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2618 to 1927. [2023-02-18 08:15:41,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1927 states, 1452 states have (on average 1.1398071625344353) internal successors, (1655), 1510 states have internal predecessors, (1655), 298 states have call successors, (298), 109 states have call predecessors, (298), 172 states have return successors, (443), 307 states have call predecessors, (443), 245 states have call successors, (443) [2023-02-18 08:15:41,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1927 states to 1927 states and 2396 transitions. [2023-02-18 08:15:41,433 INFO L78 Accepts]: Start accepts. Automaton has 1927 states and 2396 transitions. Word has length 44 [2023-02-18 08:15:41,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 08:15:41,433 INFO L495 AbstractCegarLoop]: Abstraction has 1927 states and 2396 transitions. [2023-02-18 08:15:41,433 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 2.9047619047619047) internal successors, (61), 16 states have internal predecessors, (61), 5 states have call successors, (7), 5 states have call predecessors, (7), 5 states have return successors, (5), 4 states have call predecessors, (5), 1 states have call successors, (5) [2023-02-18 08:15:41,434 INFO L276 IsEmpty]: Start isEmpty. Operand 1927 states and 2396 transitions. [2023-02-18 08:15:41,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2023-02-18 08:15:41,435 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 08:15:41,435 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 08:15:41,441 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2023-02-18 08:15:41,642 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-02-18 08:15:41,642 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ackermannErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2023-02-18 08:15:41,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 08:15:41,642 INFO L85 PathProgramCache]: Analyzing trace with hash 407823314, now seen corresponding path program 1 times [2023-02-18 08:15:41,642 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 08:15:41,643 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2007796263] [2023-02-18 08:15:41,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 08:15:41,643 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 08:15:41,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 08:15:41,679 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2023-02-18 08:15:41,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 08:15:41,689 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 38 proven. 5 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-02-18 08:15:41,689 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 08:15:41,689 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2007796263] [2023-02-18 08:15:41,689 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2007796263] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 08:15:41,689 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [251653654] [2023-02-18 08:15:41,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 08:15:41,689 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 08:15:41,690 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 08:15:41,690 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 08:15:41,693 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-02-18 08:15:41,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 08:15:41,727 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 9 conjunts are in the unsatisfiable core [2023-02-18 08:15:41,729 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 08:15:41,757 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 52 proven. 3 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-02-18 08:15:41,757 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 08:15:41,808 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 53 proven. 2 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-02-18 08:15:41,809 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [251653654] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 08:15:41,809 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 08:15:41,809 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 16 [2023-02-18 08:15:41,809 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2081790809] [2023-02-18 08:15:41,809 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 08:15:41,810 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-02-18 08:15:41,810 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 08:15:41,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-02-18 08:15:41,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2023-02-18 08:15:41,810 INFO L87 Difference]: Start difference. First operand 1927 states and 2396 transitions. Second operand has 16 states, 16 states have (on average 3.375) internal successors, (54), 13 states have internal predecessors, (54), 6 states have call successors, (9), 5 states have call predecessors, (9), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-02-18 08:15:42,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 08:15:42,188 INFO L93 Difference]: Finished difference Result 2463 states and 3242 transitions. [2023-02-18 08:15:42,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-02-18 08:15:42,189 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.375) internal successors, (54), 13 states have internal predecessors, (54), 6 states have call successors, (9), 5 states have call predecessors, (9), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 51 [2023-02-18 08:15:42,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 08:15:42,196 INFO L225 Difference]: With dead ends: 2463 [2023-02-18 08:15:42,196 INFO L226 Difference]: Without dead ends: 2363 [2023-02-18 08:15:42,197 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 89 SyntacticMatches, 7 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 247 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=334, Invalid=926, Unknown=0, NotChecked=0, Total=1260 [2023-02-18 08:15:42,198 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 160 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 465 mSolverCounterSat, 124 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 160 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 589 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 124 IncrementalHoareTripleChecker+Valid, 465 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-18 08:15:42,198 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [160 Valid, 85 Invalid, 589 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [124 Valid, 465 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-18 08:15:42,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2363 states. [2023-02-18 08:15:42,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2363 to 1867. [2023-02-18 08:15:42,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1867 states, 1405 states have (on average 1.1330960854092527) internal successors, (1592), 1467 states have internal predecessors, (1592), 286 states have call successors, (286), 102 states have call predecessors, (286), 172 states have return successors, (443), 297 states have call predecessors, (443), 245 states have call successors, (443) [2023-02-18 08:15:42,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1867 states to 1867 states and 2321 transitions. [2023-02-18 08:15:42,290 INFO L78 Accepts]: Start accepts. Automaton has 1867 states and 2321 transitions. Word has length 51 [2023-02-18 08:15:42,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 08:15:42,290 INFO L495 AbstractCegarLoop]: Abstraction has 1867 states and 2321 transitions. [2023-02-18 08:15:42,290 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.375) internal successors, (54), 13 states have internal predecessors, (54), 6 states have call successors, (9), 5 states have call predecessors, (9), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-02-18 08:15:42,291 INFO L276 IsEmpty]: Start isEmpty. Operand 1867 states and 2321 transitions. [2023-02-18 08:15:42,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2023-02-18 08:15:42,292 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 08:15:42,292 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 08:15:42,298 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-02-18 08:15:42,498 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-02-18 08:15:42,498 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ackermannErr6ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2023-02-18 08:15:42,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 08:15:42,499 INFO L85 PathProgramCache]: Analyzing trace with hash 357169897, now seen corresponding path program 3 times [2023-02-18 08:15:42,499 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 08:15:42,499 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1169456582] [2023-02-18 08:15:42,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 08:15:42,499 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 08:15:42,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 08:15:42,585 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2023-02-18 08:15:42,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 08:15:42,602 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 3 proven. 71 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-02-18 08:15:42,602 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 08:15:42,602 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1169456582] [2023-02-18 08:15:42,602 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1169456582] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 08:15:42,602 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [669611763] [2023-02-18 08:15:42,602 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-18 08:15:42,602 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 08:15:42,603 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 08:15:42,604 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 08:15:42,606 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-02-18 08:15:42,639 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2023-02-18 08:15:42,639 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 08:15:42,640 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 16 conjunts are in the unsatisfiable core [2023-02-18 08:15:42,641 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 08:15:42,690 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 3 proven. 71 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-02-18 08:15:42,690 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 08:15:42,815 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 5 proven. 69 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-02-18 08:15:42,815 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [669611763] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 08:15:42,815 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 08:15:42,815 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 26 [2023-02-18 08:15:42,815 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1534840759] [2023-02-18 08:15:42,815 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 08:15:42,815 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-02-18 08:15:42,815 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 08:15:42,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-02-18 08:15:42,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=582, Unknown=0, NotChecked=0, Total=702 [2023-02-18 08:15:42,816 INFO L87 Difference]: Start difference. First operand 1867 states and 2321 transitions. Second operand has 27 states, 24 states have (on average 3.125) internal successors, (75), 19 states have internal predecessors, (75), 10 states have call successors, (12), 9 states have call predecessors, (12), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-18 08:15:43,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 08:15:43,229 INFO L93 Difference]: Finished difference Result 2157 states and 2766 transitions. [2023-02-18 08:15:43,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2023-02-18 08:15:43,229 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 24 states have (on average 3.125) internal successors, (75), 19 states have internal predecessors, (75), 10 states have call successors, (12), 9 states have call predecessors, (12), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 51 [2023-02-18 08:15:43,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 08:15:43,236 INFO L225 Difference]: With dead ends: 2157 [2023-02-18 08:15:43,236 INFO L226 Difference]: Without dead ends: 2156 [2023-02-18 08:15:43,237 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 81 SyntacticMatches, 11 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 533 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=634, Invalid=1916, Unknown=0, NotChecked=0, Total=2550 [2023-02-18 08:15:43,237 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 468 mSDsluCounter, 163 mSDsCounter, 0 mSdLazyCounter, 350 mSolverCounterSat, 144 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 468 SdHoareTripleChecker+Valid, 182 SdHoareTripleChecker+Invalid, 494 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 144 IncrementalHoareTripleChecker+Valid, 350 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-18 08:15:43,238 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [468 Valid, 182 Invalid, 494 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [144 Valid, 350 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-18 08:15:43,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2156 states. [2023-02-18 08:15:43,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2156 to 1895. [2023-02-18 08:15:43,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1895 states, 1428 states have (on average 1.1330532212885154) internal successors, (1618), 1490 states have internal predecessors, (1618), 291 states have call successors, (291), 105 states have call predecessors, (291), 172 states have return successors, (443), 299 states have call predecessors, (443), 245 states have call successors, (443) [2023-02-18 08:15:43,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1895 states to 1895 states and 2352 transitions. [2023-02-18 08:15:43,341 INFO L78 Accepts]: Start accepts. Automaton has 1895 states and 2352 transitions. Word has length 51 [2023-02-18 08:15:43,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 08:15:43,342 INFO L495 AbstractCegarLoop]: Abstraction has 1895 states and 2352 transitions. [2023-02-18 08:15:43,342 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 24 states have (on average 3.125) internal successors, (75), 19 states have internal predecessors, (75), 10 states have call successors, (12), 9 states have call predecessors, (12), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-18 08:15:43,342 INFO L276 IsEmpty]: Start isEmpty. Operand 1895 states and 2352 transitions. [2023-02-18 08:15:43,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2023-02-18 08:15:43,343 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 08:15:43,343 INFO L195 NwaCegarLoop]: trace histogram [6, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 08:15:43,352 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-02-18 08:15:43,548 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 08:15:43,548 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2023-02-18 08:15:43,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 08:15:43,548 INFO L85 PathProgramCache]: Analyzing trace with hash 843839239, now seen corresponding path program 1 times [2023-02-18 08:15:43,548 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 08:15:43,548 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2097256949] [2023-02-18 08:15:43,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 08:15:43,549 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 08:15:43,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 08:15:43,603 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-02-18 08:15:43,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 08:15:43,639 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-02-18 08:15:43,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 08:15:43,657 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-02-18 08:15:43,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 08:15:43,672 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2023-02-18 08:15:43,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 08:15:43,692 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 21 proven. 16 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-02-18 08:15:43,692 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 08:15:43,692 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2097256949] [2023-02-18 08:15:43,692 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2097256949] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 08:15:43,692 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [758235243] [2023-02-18 08:15:43,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 08:15:43,693 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 08:15:43,693 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 08:15:43,694 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 08:15:43,696 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-02-18 08:15:43,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 08:15:43,732 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 15 conjunts are in the unsatisfiable core [2023-02-18 08:15:43,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 08:15:43,764 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 14 proven. 18 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2023-02-18 08:15:43,764 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 08:15:43,889 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 18 proven. 19 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-02-18 08:15:43,890 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [758235243] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 08:15:43,890 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 08:15:43,890 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 13] total 26 [2023-02-18 08:15:43,890 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [210534721] [2023-02-18 08:15:43,890 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 08:15:43,891 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-02-18 08:15:43,891 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 08:15:43,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-02-18 08:15:43,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=614, Unknown=0, NotChecked=0, Total=702 [2023-02-18 08:15:43,892 INFO L87 Difference]: Start difference. First operand 1895 states and 2352 transitions. Second operand has 27 states, 26 states have (on average 2.230769230769231) internal successors, (58), 21 states have internal predecessors, (58), 5 states have call successors, (7), 3 states have call predecessors, (7), 8 states have return successors, (9), 8 states have call predecessors, (9), 3 states have call successors, (9) [2023-02-18 08:15:44,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 08:15:44,847 INFO L93 Difference]: Finished difference Result 4390 states and 7701 transitions. [2023-02-18 08:15:44,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2023-02-18 08:15:44,848 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 2.230769230769231) internal successors, (58), 21 states have internal predecessors, (58), 5 states have call successors, (7), 3 states have call predecessors, (7), 8 states have return successors, (9), 8 states have call predecessors, (9), 3 states have call successors, (9) Word has length 53 [2023-02-18 08:15:44,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 08:15:44,876 INFO L225 Difference]: With dead ends: 4390 [2023-02-18 08:15:44,876 INFO L226 Difference]: Without dead ends: 4388 [2023-02-18 08:15:44,881 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 95 SyntacticMatches, 6 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1693 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1154, Invalid=5008, Unknown=0, NotChecked=0, Total=6162 [2023-02-18 08:15:44,881 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 318 mSDsluCounter, 228 mSDsCounter, 0 mSdLazyCounter, 857 mSolverCounterSat, 692 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 331 SdHoareTripleChecker+Valid, 253 SdHoareTripleChecker+Invalid, 1549 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 692 IncrementalHoareTripleChecker+Valid, 857 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-02-18 08:15:44,881 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [331 Valid, 253 Invalid, 1549 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [692 Valid, 857 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-02-18 08:15:44,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4388 states. [2023-02-18 08:15:45,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4388 to 3212. [2023-02-18 08:15:45,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3212 states, 2254 states have (on average 1.1029281277728482) internal successors, (2486), 2319 states have internal predecessors, (2486), 556 states have call successors, (556), 119 states have call predecessors, (556), 398 states have return successors, (3128), 773 states have call predecessors, (3128), 508 states have call successors, (3128) [2023-02-18 08:15:45,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3212 states to 3212 states and 6170 transitions. [2023-02-18 08:15:45,092 INFO L78 Accepts]: Start accepts. Automaton has 3212 states and 6170 transitions. Word has length 53 [2023-02-18 08:15:45,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 08:15:45,093 INFO L495 AbstractCegarLoop]: Abstraction has 3212 states and 6170 transitions. [2023-02-18 08:15:45,093 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 2.230769230769231) internal successors, (58), 21 states have internal predecessors, (58), 5 states have call successors, (7), 3 states have call predecessors, (7), 8 states have return successors, (9), 8 states have call predecessors, (9), 3 states have call successors, (9) [2023-02-18 08:15:45,093 INFO L276 IsEmpty]: Start isEmpty. Operand 3212 states and 6170 transitions. [2023-02-18 08:15:45,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2023-02-18 08:15:45,094 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 08:15:45,094 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1] [2023-02-18 08:15:45,131 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-02-18 08:15:45,331 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 08:15:45,331 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ackermannErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2023-02-18 08:15:45,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 08:15:45,332 INFO L85 PathProgramCache]: Analyzing trace with hash 2013961680, now seen corresponding path program 1 times [2023-02-18 08:15:45,332 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 08:15:45,332 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [637339347] [2023-02-18 08:15:45,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 08:15:45,332 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 08:15:45,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 08:15:45,420 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 111 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-02-18 08:15:45,421 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 08:15:45,421 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [637339347] [2023-02-18 08:15:45,421 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [637339347] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 08:15:45,421 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [569309509] [2023-02-18 08:15:45,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 08:15:45,421 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 08:15:45,421 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 08:15:45,422 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 08:15:45,424 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-02-18 08:15:45,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 08:15:45,462 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 18 conjunts are in the unsatisfiable core [2023-02-18 08:15:45,463 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 08:15:45,520 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 111 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-02-18 08:15:45,520 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 08:15:45,627 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 111 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-02-18 08:15:45,627 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [569309509] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 08:15:45,627 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 08:15:45,627 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 23 [2023-02-18 08:15:45,627 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1027430220] [2023-02-18 08:15:45,627 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 08:15:45,628 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-02-18 08:15:45,628 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 08:15:45,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-02-18 08:15:45,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=416, Unknown=0, NotChecked=0, Total=552 [2023-02-18 08:15:45,629 INFO L87 Difference]: Start difference. First operand 3212 states and 6170 transitions. Second operand has 24 states, 23 states have (on average 3.652173913043478) internal successors, (84), 14 states have internal predecessors, (84), 10 states have call successors, (16), 10 states have call predecessors, (16), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 08:15:46,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 08:15:46,434 INFO L93 Difference]: Finished difference Result 9358 states and 17609 transitions. [2023-02-18 08:15:46,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2023-02-18 08:15:46,435 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 3.652173913043478) internal successors, (84), 14 states have internal predecessors, (84), 10 states have call successors, (16), 10 states have call predecessors, (16), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2023-02-18 08:15:46,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 08:15:46,478 INFO L225 Difference]: With dead ends: 9358 [2023-02-18 08:15:46,478 INFO L226 Difference]: Without dead ends: 9357 [2023-02-18 08:15:46,483 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 91 SyntacticMatches, 17 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 439 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=554, Invalid=1252, Unknown=0, NotChecked=0, Total=1806 [2023-02-18 08:15:46,483 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 722 mSDsluCounter, 310 mSDsCounter, 0 mSdLazyCounter, 465 mSolverCounterSat, 291 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 728 SdHoareTripleChecker+Valid, 340 SdHoareTripleChecker+Invalid, 756 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 291 IncrementalHoareTripleChecker+Valid, 465 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-18 08:15:46,483 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [728 Valid, 340 Invalid, 756 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [291 Valid, 465 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-18 08:15:46,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9357 states. [2023-02-18 08:15:47,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9357 to 8660. [2023-02-18 08:15:47,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8660 states, 6118 states have (on average 1.104609349460608) internal successors, (6758), 6273 states have internal predecessors, (6758), 1498 states have call successors, (1498), 347 states have call predecessors, (1498), 1040 states have return successors, (8216), 2039 states have call predecessors, (8216), 1330 states have call successors, (8216) [2023-02-18 08:15:47,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8660 states to 8660 states and 16472 transitions. [2023-02-18 08:15:47,089 INFO L78 Accepts]: Start accepts. Automaton has 8660 states and 16472 transitions. Word has length 57 [2023-02-18 08:15:47,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 08:15:47,089 INFO L495 AbstractCegarLoop]: Abstraction has 8660 states and 16472 transitions. [2023-02-18 08:15:47,090 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 3.652173913043478) internal successors, (84), 14 states have internal predecessors, (84), 10 states have call successors, (16), 10 states have call predecessors, (16), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 08:15:47,090 INFO L276 IsEmpty]: Start isEmpty. Operand 8660 states and 16472 transitions. [2023-02-18 08:15:47,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2023-02-18 08:15:47,092 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 08:15:47,092 INFO L195 NwaCegarLoop]: trace histogram [6, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 08:15:47,098 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2023-02-18 08:15:47,296 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 08:15:47,296 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ackermannErr6ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2023-02-18 08:15:47,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 08:15:47,297 INFO L85 PathProgramCache]: Analyzing trace with hash -814290418, now seen corresponding path program 1 times [2023-02-18 08:15:47,297 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 08:15:47,297 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [42678216] [2023-02-18 08:15:47,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 08:15:47,297 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 08:15:47,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 08:15:47,399 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-02-18 08:15:47,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 08:15:47,430 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-02-18 08:15:47,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 08:15:47,449 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-02-18 08:15:47,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 08:15:47,468 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2023-02-18 08:15:47,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 08:15:47,487 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 36 proven. 6 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-02-18 08:15:47,487 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 08:15:47,487 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [42678216] [2023-02-18 08:15:47,488 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [42678216] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 08:15:47,488 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1440237073] [2023-02-18 08:15:47,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 08:15:47,488 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 08:15:47,488 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 08:15:47,489 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 08:15:47,499 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-02-18 08:15:47,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 08:15:47,535 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 15 conjunts are in the unsatisfiable core [2023-02-18 08:15:47,535 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 08:15:47,573 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 27 proven. 10 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2023-02-18 08:15:47,573 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 08:15:47,717 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 40 proven. 2 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-02-18 08:15:47,717 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1440237073] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 08:15:47,717 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 08:15:47,718 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 13] total 26 [2023-02-18 08:15:47,718 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [691462137] [2023-02-18 08:15:47,718 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 08:15:47,718 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-02-18 08:15:47,718 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 08:15:47,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-02-18 08:15:47,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=608, Unknown=0, NotChecked=0, Total=702 [2023-02-18 08:15:47,719 INFO L87 Difference]: Start difference. First operand 8660 states and 16472 transitions. Second operand has 27 states, 26 states have (on average 2.3846153846153846) internal successors, (62), 21 states have internal predecessors, (62), 5 states have call successors, (7), 3 states have call predecessors, (7), 8 states have return successors, (9), 8 states have call predecessors, (9), 3 states have call successors, (9) [2023-02-18 08:15:49,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 08:15:49,482 INFO L93 Difference]: Finished difference Result 30195 states and 100270 transitions. [2023-02-18 08:15:49,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2023-02-18 08:15:49,484 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 2.3846153846153846) internal successors, (62), 21 states have internal predecessors, (62), 5 states have call successors, (7), 3 states have call predecessors, (7), 8 states have return successors, (9), 8 states have call predecessors, (9), 3 states have call successors, (9) Word has length 55 [2023-02-18 08:15:49,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 08:15:49,662 INFO L225 Difference]: With dead ends: 30195 [2023-02-18 08:15:49,662 INFO L226 Difference]: Without dead ends: 22200 [2023-02-18 08:15:49,898 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 95 SyntacticMatches, 10 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 824 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=905, Invalid=3517, Unknown=0, NotChecked=0, Total=4422 [2023-02-18 08:15:49,900 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 158 mSDsluCounter, 269 mSDsCounter, 0 mSdLazyCounter, 804 mSolverCounterSat, 250 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 158 SdHoareTripleChecker+Valid, 305 SdHoareTripleChecker+Invalid, 1054 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 250 IncrementalHoareTripleChecker+Valid, 804 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-02-18 08:15:49,900 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [158 Valid, 305 Invalid, 1054 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [250 Valid, 804 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-02-18 08:15:49,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22200 states. [2023-02-18 08:15:51,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22200 to 17548. [2023-02-18 08:15:51,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17548 states, 11658 states have (on average 1.0686224052153028) internal successors, (12458), 11785 states have internal predecessors, (12458), 3307 states have call successors, (3307), 438 states have call predecessors, (3307), 2579 states have return successors, (43949), 5324 states have call predecessors, (43949), 3113 states have call successors, (43949) [2023-02-18 08:15:51,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17548 states to 17548 states and 59714 transitions. [2023-02-18 08:15:51,710 INFO L78 Accepts]: Start accepts. Automaton has 17548 states and 59714 transitions. Word has length 55 [2023-02-18 08:15:51,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 08:15:51,710 INFO L495 AbstractCegarLoop]: Abstraction has 17548 states and 59714 transitions. [2023-02-18 08:15:51,710 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 2.3846153846153846) internal successors, (62), 21 states have internal predecessors, (62), 5 states have call successors, (7), 3 states have call predecessors, (7), 8 states have return successors, (9), 8 states have call predecessors, (9), 3 states have call successors, (9) [2023-02-18 08:15:51,710 INFO L276 IsEmpty]: Start isEmpty. Operand 17548 states and 59714 transitions. [2023-02-18 08:15:51,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2023-02-18 08:15:51,713 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 08:15:51,713 INFO L195 NwaCegarLoop]: trace histogram [8, 6, 5, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 08:15:51,717 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2023-02-18 08:15:51,917 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2023-02-18 08:15:51,917 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ackermannErr6ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2023-02-18 08:15:51,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 08:15:51,918 INFO L85 PathProgramCache]: Analyzing trace with hash -1106576793, now seen corresponding path program 2 times [2023-02-18 08:15:51,918 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 08:15:51,918 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1950333446] [2023-02-18 08:15:51,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 08:15:51,918 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 08:15:51,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 08:15:51,977 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-02-18 08:15:51,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 08:15:52,009 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-02-18 08:15:52,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 08:15:52,035 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-02-18 08:15:52,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 08:15:52,051 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-02-18 08:15:52,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 08:15:52,071 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2023-02-18 08:15:52,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 08:15:52,090 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 70 proven. 16 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2023-02-18 08:15:52,090 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 08:15:52,090 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1950333446] [2023-02-18 08:15:52,090 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1950333446] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 08:15:52,090 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1235872127] [2023-02-18 08:15:52,090 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-18 08:15:52,091 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 08:15:52,091 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 08:15:52,092 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 08:15:52,093 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-02-18 08:15:52,138 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-18 08:15:52,138 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 08:15:52,139 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 19 conjunts are in the unsatisfiable core [2023-02-18 08:15:52,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 08:15:52,210 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 59 proven. 22 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2023-02-18 08:15:52,210 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 08:15:52,419 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 78 proven. 8 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2023-02-18 08:15:52,420 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1235872127] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 08:15:52,420 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 08:15:52,420 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 16] total 32 [2023-02-18 08:15:52,420 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [400554917] [2023-02-18 08:15:52,420 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 08:15:52,420 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-02-18 08:15:52,420 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 08:15:52,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-02-18 08:15:52,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=930, Unknown=0, NotChecked=0, Total=1056 [2023-02-18 08:15:52,421 INFO L87 Difference]: Start difference. First operand 17548 states and 59714 transitions. Second operand has 33 states, 32 states have (on average 2.4375) internal successors, (78), 23 states have internal predecessors, (78), 7 states have call successors, (9), 5 states have call predecessors, (9), 8 states have return successors, (11), 10 states have call predecessors, (11), 3 states have call successors, (11) [2023-02-18 08:15:53,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 08:15:53,989 INFO L93 Difference]: Finished difference Result 29333 states and 97052 transitions. [2023-02-18 08:15:53,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2023-02-18 08:15:53,989 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 32 states have (on average 2.4375) internal successors, (78), 23 states have internal predecessors, (78), 7 states have call successors, (9), 5 states have call predecessors, (9), 8 states have return successors, (11), 10 states have call predecessors, (11), 3 states have call successors, (11) Word has length 72 [2023-02-18 08:15:53,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 08:15:54,039 INFO L225 Difference]: With dead ends: 29333 [2023-02-18 08:15:54,040 INFO L226 Difference]: Without dead ends: 12445 [2023-02-18 08:15:54,196 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 126 SyntacticMatches, 14 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 643 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=750, Invalid=3032, Unknown=0, NotChecked=0, Total=3782 [2023-02-18 08:15:54,197 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 229 mSDsluCounter, 260 mSDsCounter, 0 mSdLazyCounter, 633 mSolverCounterSat, 216 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 229 SdHoareTripleChecker+Valid, 299 SdHoareTripleChecker+Invalid, 849 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 216 IncrementalHoareTripleChecker+Valid, 633 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-18 08:15:54,197 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [229 Valid, 299 Invalid, 849 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [216 Valid, 633 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-18 08:15:54,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12445 states. [2023-02-18 08:15:55,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12445 to 11049. [2023-02-18 08:15:55,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11049 states, 7827 states have (on average 1.109237255653507) internal successors, (8682), 8130 states have internal predecessors, (8682), 1942 states have call successors, (1942), 487 states have call predecessors, (1942), 1276 states have return successors, (5975), 2431 states have call predecessors, (5975), 1723 states have call successors, (5975) [2023-02-18 08:15:55,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11049 states to 11049 states and 16599 transitions. [2023-02-18 08:15:55,092 INFO L78 Accepts]: Start accepts. Automaton has 11049 states and 16599 transitions. Word has length 72 [2023-02-18 08:15:55,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 08:15:55,093 INFO L495 AbstractCegarLoop]: Abstraction has 11049 states and 16599 transitions. [2023-02-18 08:15:55,093 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 32 states have (on average 2.4375) internal successors, (78), 23 states have internal predecessors, (78), 7 states have call successors, (9), 5 states have call predecessors, (9), 8 states have return successors, (11), 10 states have call predecessors, (11), 3 states have call successors, (11) [2023-02-18 08:15:55,093 INFO L276 IsEmpty]: Start isEmpty. Operand 11049 states and 16599 transitions. [2023-02-18 08:15:55,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2023-02-18 08:15:55,102 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 08:15:55,102 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 7, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 08:15:55,108 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-02-18 08:15:55,306 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 08:15:55,307 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ackermannErr6ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2023-02-18 08:15:55,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 08:15:55,307 INFO L85 PathProgramCache]: Analyzing trace with hash 2104709525, now seen corresponding path program 4 times [2023-02-18 08:15:55,307 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 08:15:55,307 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [320280647] [2023-02-18 08:15:55,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 08:15:55,308 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 08:15:55,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 08:15:55,429 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2023-02-18 08:15:55,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 08:15:55,449 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 4 proven. 158 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-02-18 08:15:55,450 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 08:15:55,450 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [320280647] [2023-02-18 08:15:55,450 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [320280647] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 08:15:55,450 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [961846027] [2023-02-18 08:15:55,450 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-18 08:15:55,450 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 08:15:55,450 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 08:15:55,451 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 08:15:55,454 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-02-18 08:15:55,498 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-18 08:15:55,499 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 08:15:55,500 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 19 conjunts are in the unsatisfiable core [2023-02-18 08:15:55,501 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 08:15:55,537 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 103 proven. 4 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2023-02-18 08:15:55,537 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 08:15:55,552 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 103 proven. 4 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2023-02-18 08:15:55,552 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [961846027] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 08:15:55,553 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 08:15:55,553 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 6, 6] total 23 [2023-02-18 08:15:55,553 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [604179488] [2023-02-18 08:15:55,553 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 08:15:55,553 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-02-18 08:15:55,554 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 08:15:55,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-02-18 08:15:55,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=430, Unknown=0, NotChecked=0, Total=506 [2023-02-18 08:15:55,554 INFO L87 Difference]: Start difference. First operand 11049 states and 16599 transitions. Second operand has 23 states, 22 states have (on average 3.5) internal successors, (77), 16 states have internal predecessors, (77), 10 states have call successors, (13), 9 states have call predecessors, (13), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-18 08:15:56,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 08:15:56,191 INFO L93 Difference]: Finished difference Result 11583 states and 17379 transitions. [2023-02-18 08:15:56,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-02-18 08:15:56,192 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 3.5) internal successors, (77), 16 states have internal predecessors, (77), 10 states have call successors, (13), 9 states have call predecessors, (13), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 67 [2023-02-18 08:15:56,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 08:15:56,233 INFO L225 Difference]: With dead ends: 11583 [2023-02-18 08:15:56,233 INFO L226 Difference]: Without dead ends: 9316 [2023-02-18 08:15:56,245 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 265 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=374, Invalid=1348, Unknown=0, NotChecked=0, Total=1722 [2023-02-18 08:15:56,246 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 289 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 329 mSolverCounterSat, 126 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 289 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 455 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 126 IncrementalHoareTripleChecker+Valid, 329 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-18 08:15:56,246 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [289 Valid, 86 Invalid, 455 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [126 Valid, 329 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-18 08:15:56,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9316 states. [2023-02-18 08:15:56,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9316 to 8750. [2023-02-18 08:15:56,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8750 states, 5956 states have (on average 1.0661517797179314) internal successors, (6350), 6082 states have internal predecessors, (6350), 1731 states have call successors, (1731), 316 states have call predecessors, (1731), 1059 states have return successors, (5687), 2351 states have call predecessors, (5687), 1723 states have call successors, (5687) [2023-02-18 08:15:56,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8750 states to 8750 states and 13768 transitions. [2023-02-18 08:15:56,735 INFO L78 Accepts]: Start accepts. Automaton has 8750 states and 13768 transitions. Word has length 67 [2023-02-18 08:15:56,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 08:15:56,736 INFO L495 AbstractCegarLoop]: Abstraction has 8750 states and 13768 transitions. [2023-02-18 08:15:56,736 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 3.5) internal successors, (77), 16 states have internal predecessors, (77), 10 states have call successors, (13), 9 states have call predecessors, (13), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-18 08:15:56,736 INFO L276 IsEmpty]: Start isEmpty. Operand 8750 states and 13768 transitions. [2023-02-18 08:15:56,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2023-02-18 08:15:56,738 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 08:15:56,738 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 6, 6, 6, 5, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 08:15:56,742 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-02-18 08:15:56,942 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 08:15:56,942 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ackermannErr6ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2023-02-18 08:15:56,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 08:15:56,943 INFO L85 PathProgramCache]: Analyzing trace with hash 1935422832, now seen corresponding path program 3 times [2023-02-18 08:15:56,943 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 08:15:56,943 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [707253649] [2023-02-18 08:15:56,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 08:15:56,943 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 08:15:56,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 08:15:57,015 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-02-18 08:15:57,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 08:15:57,031 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-02-18 08:15:57,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 08:15:57,047 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 62 proven. 77 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-02-18 08:15:57,047 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 08:15:57,047 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [707253649] [2023-02-18 08:15:57,047 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [707253649] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 08:15:57,048 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [656201710] [2023-02-18 08:15:57,048 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-18 08:15:57,048 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 08:15:57,048 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 08:15:57,049 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 08:15:57,068 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-02-18 08:15:57,104 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2023-02-18 08:15:57,104 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 08:15:57,105 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 17 conjunts are in the unsatisfiable core [2023-02-18 08:15:57,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 08:15:57,165 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 60 proven. 79 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-02-18 08:15:57,165 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 08:15:57,327 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 64 proven. 75 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-02-18 08:15:57,327 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [656201710] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 08:15:57,327 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 08:15:57,327 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 33 [2023-02-18 08:15:57,327 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1408072452] [2023-02-18 08:15:57,327 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 08:15:57,327 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-02-18 08:15:57,327 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 08:15:57,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-02-18 08:15:57,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=949, Unknown=0, NotChecked=0, Total=1122 [2023-02-18 08:15:57,328 INFO L87 Difference]: Start difference. First operand 8750 states and 13768 transitions. Second operand has 34 states, 33 states have (on average 3.121212121212121) internal successors, (103), 22 states have internal predecessors, (103), 11 states have call successors, (13), 11 states have call predecessors, (13), 5 states have return successors, (5), 4 states have call predecessors, (5), 1 states have call successors, (5) [2023-02-18 08:15:58,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 08:15:58,048 INFO L93 Difference]: Finished difference Result 9401 states and 14766 transitions. [2023-02-18 08:15:58,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-02-18 08:15:58,049 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 3.121212121212121) internal successors, (103), 22 states have internal predecessors, (103), 11 states have call successors, (13), 11 states have call predecessors, (13), 5 states have return successors, (5), 4 states have call predecessors, (5), 1 states have call successors, (5) Word has length 68 [2023-02-18 08:15:58,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 08:15:58,076 INFO L225 Difference]: With dead ends: 9401 [2023-02-18 08:15:58,077 INFO L226 Difference]: Without dead ends: 9400 [2023-02-18 08:15:58,081 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 115 SyntacticMatches, 12 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 533 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=573, Invalid=1977, Unknown=0, NotChecked=0, Total=2550 [2023-02-18 08:15:58,082 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 241 mSDsluCounter, 266 mSDsCounter, 0 mSdLazyCounter, 553 mSolverCounterSat, 216 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 241 SdHoareTripleChecker+Valid, 297 SdHoareTripleChecker+Invalid, 769 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 216 IncrementalHoareTripleChecker+Valid, 553 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-18 08:15:58,082 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [241 Valid, 297 Invalid, 769 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [216 Valid, 553 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-18 08:15:58,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9400 states. [2023-02-18 08:15:58,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9400 to 8858. [2023-02-18 08:15:58,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8858 states, 6028 states have (on average 1.0623755806237558) internal successors, (6404), 6154 states have internal predecessors, (6404), 1731 states have call successors, (1731), 316 states have call predecessors, (1731), 1095 states have return successors, (5781), 2387 states have call predecessors, (5781), 1723 states have call successors, (5781) [2023-02-18 08:15:58,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8858 states to 8858 states and 13916 transitions. [2023-02-18 08:15:58,586 INFO L78 Accepts]: Start accepts. Automaton has 8858 states and 13916 transitions. Word has length 68 [2023-02-18 08:15:58,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 08:15:58,586 INFO L495 AbstractCegarLoop]: Abstraction has 8858 states and 13916 transitions. [2023-02-18 08:15:58,586 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 33 states have (on average 3.121212121212121) internal successors, (103), 22 states have internal predecessors, (103), 11 states have call successors, (13), 11 states have call predecessors, (13), 5 states have return successors, (5), 4 states have call predecessors, (5), 1 states have call successors, (5) [2023-02-18 08:15:58,586 INFO L276 IsEmpty]: Start isEmpty. Operand 8858 states and 13916 transitions. [2023-02-18 08:15:58,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2023-02-18 08:15:58,589 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 08:15:58,589 INFO L195 NwaCegarLoop]: trace histogram [9, 7, 5, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2023-02-18 08:15:58,609 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2023-02-18 08:15:58,793 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 08:15:58,794 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2023-02-18 08:15:58,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 08:15:58,794 INFO L85 PathProgramCache]: Analyzing trace with hash -1903746682, now seen corresponding path program 2 times [2023-02-18 08:15:58,794 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 08:15:58,794 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1956653099] [2023-02-18 08:15:58,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 08:15:58,795 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 08:15:58,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 08:15:58,830 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-02-18 08:15:58,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 08:15:58,854 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-02-18 08:15:58,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 08:15:58,888 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-02-18 08:15:58,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 08:15:58,920 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-02-18 08:15:58,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 08:15:58,929 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-02-18 08:15:58,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 08:15:58,932 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2023-02-18 08:15:58,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 08:15:58,934 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2023-02-18 08:15:58,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 08:15:58,936 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 85 proven. 24 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2023-02-18 08:15:58,937 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 08:15:58,937 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1956653099] [2023-02-18 08:15:58,937 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1956653099] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 08:15:58,937 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [830813447] [2023-02-18 08:15:58,937 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-18 08:15:58,937 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 08:15:58,937 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 08:15:58,938 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 08:15:58,968 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-02-18 08:15:59,000 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-18 08:15:59,000 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 08:15:59,001 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 7 conjunts are in the unsatisfiable core [2023-02-18 08:15:59,002 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 08:15:59,017 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 85 proven. 15 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2023-02-18 08:15:59,017 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 08:15:59,082 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 85 proven. 26 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2023-02-18 08:15:59,083 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [830813447] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 08:15:59,083 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 08:15:59,083 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 8] total 13 [2023-02-18 08:15:59,083 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [192742292] [2023-02-18 08:15:59,084 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 08:15:59,084 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-02-18 08:15:59,084 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 08:15:59,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-02-18 08:15:59,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2023-02-18 08:15:59,085 INFO L87 Difference]: Start difference. First operand 8858 states and 13916 transitions. Second operand has 13 states, 13 states have (on average 6.3076923076923075) internal successors, (82), 13 states have internal predecessors, (82), 12 states have call successors, (14), 2 states have call predecessors, (14), 7 states have return successors, (14), 6 states have call predecessors, (14), 11 states have call successors, (14) [2023-02-18 08:15:59,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 08:15:59,631 INFO L93 Difference]: Finished difference Result 17973 states and 31840 transitions. [2023-02-18 08:15:59,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-02-18 08:15:59,631 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 6.3076923076923075) internal successors, (82), 13 states have internal predecessors, (82), 12 states have call successors, (14), 2 states have call predecessors, (14), 7 states have return successors, (14), 6 states have call predecessors, (14), 11 states have call successors, (14) Word has length 81 [2023-02-18 08:15:59,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 08:15:59,672 INFO L225 Difference]: With dead ends: 17973 [2023-02-18 08:15:59,672 INFO L226 Difference]: Without dead ends: 9802 [2023-02-18 08:15:59,716 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 165 SyntacticMatches, 7 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=102, Invalid=204, Unknown=0, NotChecked=0, Total=306 [2023-02-18 08:15:59,717 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 70 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 135 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 169 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 135 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 08:15:59,718 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 108 Invalid, 169 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 135 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 08:15:59,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9802 states. [2023-02-18 08:16:00,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9802 to 8852. [2023-02-18 08:16:00,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8852 states, 6025 states have (on average 1.0624066390041493) internal successors, (6401), 6151 states have internal predecessors, (6401), 1728 states have call successors, (1728), 316 states have call predecessors, (1728), 1095 states have return successors, (5701), 2384 states have call predecessors, (5701), 1693 states have call successors, (5701) [2023-02-18 08:16:00,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8852 states to 8852 states and 13830 transitions. [2023-02-18 08:16:00,229 INFO L78 Accepts]: Start accepts. Automaton has 8852 states and 13830 transitions. Word has length 81 [2023-02-18 08:16:00,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 08:16:00,230 INFO L495 AbstractCegarLoop]: Abstraction has 8852 states and 13830 transitions. [2023-02-18 08:16:00,230 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 6.3076923076923075) internal successors, (82), 13 states have internal predecessors, (82), 12 states have call successors, (14), 2 states have call predecessors, (14), 7 states have return successors, (14), 6 states have call predecessors, (14), 11 states have call successors, (14) [2023-02-18 08:16:00,230 INFO L276 IsEmpty]: Start isEmpty. Operand 8852 states and 13830 transitions. [2023-02-18 08:16:00,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2023-02-18 08:16:00,234 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 08:16:00,234 INFO L195 NwaCegarLoop]: trace histogram [11, 9, 6, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2023-02-18 08:16:00,247 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2023-02-18 08:16:00,438 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2023-02-18 08:16:00,438 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2023-02-18 08:16:00,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 08:16:00,438 INFO L85 PathProgramCache]: Analyzing trace with hash -1307053986, now seen corresponding path program 3 times [2023-02-18 08:16:00,438 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 08:16:00,439 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1268431600] [2023-02-18 08:16:00,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 08:16:00,439 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 08:16:00,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 08:16:00,486 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-02-18 08:16:00,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 08:16:00,527 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-02-18 08:16:00,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 08:16:00,554 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-02-18 08:16:00,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 08:16:00,581 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-02-18 08:16:00,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 08:16:00,617 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-02-18 08:16:00,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 08:16:00,632 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-02-18 08:16:00,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 08:16:00,639 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2023-02-18 08:16:00,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 08:16:00,642 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2023-02-18 08:16:00,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 08:16:00,648 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2023-02-18 08:16:00,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 08:16:00,650 INFO L134 CoverageAnalysis]: Checked inductivity of 266 backedges. 117 proven. 45 refuted. 0 times theorem prover too weak. 104 trivial. 0 not checked. [2023-02-18 08:16:00,650 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 08:16:00,650 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1268431600] [2023-02-18 08:16:00,650 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1268431600] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 08:16:00,650 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2003706720] [2023-02-18 08:16:00,650 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-18 08:16:00,651 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 08:16:00,651 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 08:16:00,652 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 08:16:00,654 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-02-18 08:16:00,715 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2023-02-18 08:16:00,716 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 08:16:00,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 12 conjunts are in the unsatisfiable core [2023-02-18 08:16:00,718 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 08:16:00,746 INFO L134 CoverageAnalysis]: Checked inductivity of 266 backedges. 153 proven. 26 refuted. 0 times theorem prover too weak. 87 trivial. 0 not checked. [2023-02-18 08:16:00,746 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 08:16:00,831 INFO L134 CoverageAnalysis]: Checked inductivity of 266 backedges. 123 proven. 57 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2023-02-18 08:16:00,831 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2003706720] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 08:16:00,831 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 08:16:00,832 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 11] total 16 [2023-02-18 08:16:00,832 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2108134148] [2023-02-18 08:16:00,832 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 08:16:00,833 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-02-18 08:16:00,833 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 08:16:00,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-02-18 08:16:00,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2023-02-18 08:16:00,834 INFO L87 Difference]: Start difference. First operand 8852 states and 13830 transitions. Second operand has 16 states, 16 states have (on average 5.1875) internal successors, (83), 16 states have internal predecessors, (83), 9 states have call successors, (14), 2 states have call predecessors, (14), 7 states have return successors, (17), 5 states have call predecessors, (17), 9 states have call successors, (17) [2023-02-18 08:16:01,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 08:16:01,504 INFO L93 Difference]: Finished difference Result 20482 states and 41518 transitions. [2023-02-18 08:16:01,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-02-18 08:16:01,504 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 5.1875) internal successors, (83), 16 states have internal predecessors, (83), 9 states have call successors, (14), 2 states have call predecessors, (14), 7 states have return successors, (17), 5 states have call predecessors, (17), 9 states have call successors, (17) Word has length 100 [2023-02-18 08:16:01,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 08:16:01,558 INFO L225 Difference]: With dead ends: 20482 [2023-02-18 08:16:01,558 INFO L226 Difference]: Without dead ends: 12345 [2023-02-18 08:16:01,604 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 199 SyntacticMatches, 16 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=113, Invalid=267, Unknown=0, NotChecked=0, Total=380 [2023-02-18 08:16:01,604 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 55 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 160 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 203 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 160 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 08:16:01,605 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [62 Valid, 133 Invalid, 203 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 160 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 08:16:01,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12345 states. [2023-02-18 08:16:02,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12345 to 11980. [2023-02-18 08:16:02,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11980 states, 8084 states have (on average 1.053686293913904) internal successors, (8518), 8271 states have internal predecessors, (8518), 2417 states have call successors, (2417), 424 states have call predecessors, (2417), 1475 states have return successors, (8115), 3284 states have call predecessors, (8115), 2362 states have call successors, (8115) [2023-02-18 08:16:02,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11980 states to 11980 states and 19050 transitions. [2023-02-18 08:16:02,347 INFO L78 Accepts]: Start accepts. Automaton has 11980 states and 19050 transitions. Word has length 100 [2023-02-18 08:16:02,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 08:16:02,347 INFO L495 AbstractCegarLoop]: Abstraction has 11980 states and 19050 transitions. [2023-02-18 08:16:02,347 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 5.1875) internal successors, (83), 16 states have internal predecessors, (83), 9 states have call successors, (14), 2 states have call predecessors, (14), 7 states have return successors, (17), 5 states have call predecessors, (17), 9 states have call successors, (17) [2023-02-18 08:16:02,347 INFO L276 IsEmpty]: Start isEmpty. Operand 11980 states and 19050 transitions. [2023-02-18 08:16:02,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2023-02-18 08:16:02,352 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 08:16:02,352 INFO L195 NwaCegarLoop]: trace histogram [10, 8, 7, 7, 7, 6, 6, 6, 4, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 08:16:02,355 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2023-02-18 08:16:02,556 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2023-02-18 08:16:02,556 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ackermannErr6ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2023-02-18 08:16:02,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 08:16:02,556 INFO L85 PathProgramCache]: Analyzing trace with hash 1104252262, now seen corresponding path program 3 times [2023-02-18 08:16:02,557 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 08:16:02,557 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [308604277] [2023-02-18 08:16:02,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 08:16:02,557 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 08:16:02,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 08:16:02,674 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-02-18 08:16:02,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 08:16:02,703 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-02-18 08:16:02,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 08:16:02,721 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-02-18 08:16:02,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 08:16:02,744 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2023-02-18 08:16:02,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 08:16:02,766 INFO L134 CoverageAnalysis]: Checked inductivity of 227 backedges. 120 proven. 86 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-02-18 08:16:02,767 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 08:16:02,767 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [308604277] [2023-02-18 08:16:02,767 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [308604277] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 08:16:02,767 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1791928883] [2023-02-18 08:16:02,767 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-18 08:16:02,767 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 08:16:02,767 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 08:16:02,768 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 08:16:02,770 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-02-18 08:16:02,840 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2023-02-18 08:16:02,840 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 08:16:02,841 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 31 conjunts are in the unsatisfiable core [2023-02-18 08:16:02,842 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 08:16:02,910 INFO L134 CoverageAnalysis]: Checked inductivity of 227 backedges. 113 proven. 41 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2023-02-18 08:16:02,910 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 08:16:02,969 INFO L134 CoverageAnalysis]: Checked inductivity of 227 backedges. 142 proven. 13 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2023-02-18 08:16:02,969 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1791928883] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 08:16:02,970 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 08:16:02,970 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 7, 8] total 29 [2023-02-18 08:16:02,970 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1887008858] [2023-02-18 08:16:02,970 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 08:16:02,970 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-02-18 08:16:02,970 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 08:16:02,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-02-18 08:16:02,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=723, Unknown=0, NotChecked=0, Total=812 [2023-02-18 08:16:02,971 INFO L87 Difference]: Start difference. First operand 11980 states and 19050 transitions. Second operand has 29 states, 29 states have (on average 3.6551724137931036) internal successors, (106), 22 states have internal predecessors, (106), 11 states have call successors, (15), 7 states have call predecessors, (15), 7 states have return successors, (10), 9 states have call predecessors, (10), 4 states have call successors, (10) [2023-02-18 08:16:04,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 08:16:04,230 INFO L93 Difference]: Finished difference Result 20826 states and 35598 transitions. [2023-02-18 08:16:04,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2023-02-18 08:16:04,231 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 3.6551724137931036) internal successors, (106), 22 states have internal predecessors, (106), 11 states have call successors, (15), 7 states have call predecessors, (15), 7 states have return successors, (10), 9 states have call predecessors, (10), 4 states have call successors, (10) Word has length 87 [2023-02-18 08:16:04,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 08:16:04,279 INFO L225 Difference]: With dead ends: 20826 [2023-02-18 08:16:04,280 INFO L226 Difference]: Without dead ends: 10351 [2023-02-18 08:16:04,344 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 246 GetRequests, 177 SyntacticMatches, 4 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 814 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=983, Invalid=3439, Unknown=0, NotChecked=0, Total=4422 [2023-02-18 08:16:04,345 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 202 mSDsluCounter, 156 mSDsCounter, 0 mSdLazyCounter, 1105 mSolverCounterSat, 189 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 202 SdHoareTripleChecker+Valid, 177 SdHoareTripleChecker+Invalid, 1294 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 189 IncrementalHoareTripleChecker+Valid, 1105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-02-18 08:16:04,345 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [202 Valid, 177 Invalid, 1294 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [189 Valid, 1105 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-02-18 08:16:04,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10351 states. [2023-02-18 08:16:04,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10351 to 8751. [2023-02-18 08:16:04,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8751 states, 5978 states have (on average 1.0463365674138507) internal successors, (6255), 6154 states have internal predecessors, (6255), 1711 states have call successors, (1711), 352 states have call predecessors, (1711), 1058 states have return successors, (4097), 2244 states have call predecessors, (4097), 1677 states have call successors, (4097) [2023-02-18 08:16:04,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8751 states to 8751 states and 12063 transitions. [2023-02-18 08:16:04,839 INFO L78 Accepts]: Start accepts. Automaton has 8751 states and 12063 transitions. Word has length 87 [2023-02-18 08:16:04,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 08:16:04,839 INFO L495 AbstractCegarLoop]: Abstraction has 8751 states and 12063 transitions. [2023-02-18 08:16:04,839 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 3.6551724137931036) internal successors, (106), 22 states have internal predecessors, (106), 11 states have call successors, (15), 7 states have call predecessors, (15), 7 states have return successors, (10), 9 states have call predecessors, (10), 4 states have call successors, (10) [2023-02-18 08:16:04,839 INFO L276 IsEmpty]: Start isEmpty. Operand 8751 states and 12063 transitions. [2023-02-18 08:16:04,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2023-02-18 08:16:04,842 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 08:16:04,842 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 11, 11, 11, 10, 10, 10, 1, 1, 1, 1, 1, 1] [2023-02-18 08:16:04,846 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2023-02-18 08:16:05,046 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2023-02-18 08:16:05,047 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ackermannErr6ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2023-02-18 08:16:05,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 08:16:05,047 INFO L85 PathProgramCache]: Analyzing trace with hash -133792040, now seen corresponding path program 3 times [2023-02-18 08:16:05,047 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 08:16:05,047 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [347582931] [2023-02-18 08:16:05,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 08:16:05,047 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 08:16:05,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 08:16:05,296 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 0 proven. 420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 08:16:05,296 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 08:16:05,296 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [347582931] [2023-02-18 08:16:05,296 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [347582931] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 08:16:05,296 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [195320485] [2023-02-18 08:16:05,296 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-18 08:16:05,296 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 08:16:05,297 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 08:16:05,297 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 08:16:05,299 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-02-18 08:16:05,367 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2023-02-18 08:16:05,367 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 08:16:05,368 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 24 conjunts are in the unsatisfiable core [2023-02-18 08:16:05,369 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 08:16:05,508 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 0 proven. 420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 08:16:05,508 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 08:16:05,851 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 0 proven. 420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 08:16:05,851 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [195320485] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 08:16:05,851 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 08:16:05,851 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 47 [2023-02-18 08:16:05,851 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1536649643] [2023-02-18 08:16:05,851 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 08:16:05,851 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2023-02-18 08:16:05,851 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 08:16:05,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2023-02-18 08:16:05,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=556, Invalid=1700, Unknown=0, NotChecked=0, Total=2256 [2023-02-18 08:16:05,853 INFO L87 Difference]: Start difference. First operand 8751 states and 12063 transitions. Second operand has 48 states, 45 states have (on average 3.488888888888889) internal successors, (157), 26 states have internal predecessors, (157), 22 states have call successors, (22), 22 states have call predecessors, (22), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 08:16:07,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 08:16:07,373 INFO L93 Difference]: Finished difference Result 15928 states and 22083 transitions. [2023-02-18 08:16:07,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2023-02-18 08:16:07,373 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 45 states have (on average 3.488888888888889) internal successors, (157), 26 states have internal predecessors, (157), 22 states have call successors, (22), 22 states have call predecessors, (22), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 91 [2023-02-18 08:16:07,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 08:16:07,420 INFO L225 Difference]: With dead ends: 15928 [2023-02-18 08:16:07,421 INFO L226 Difference]: Without dead ends: 15927 [2023-02-18 08:16:07,432 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 248 GetRequests, 139 SyntacticMatches, 20 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2101 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=2534, Invalid=5656, Unknown=0, NotChecked=0, Total=8190 [2023-02-18 08:16:07,432 INFO L413 NwaCegarLoop]: 67 mSDtfsCounter, 1052 mSDsluCounter, 611 mSDsCounter, 0 mSdLazyCounter, 867 mSolverCounterSat, 617 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1056 SdHoareTripleChecker+Valid, 678 SdHoareTripleChecker+Invalid, 1484 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 617 IncrementalHoareTripleChecker+Valid, 867 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-02-18 08:16:07,433 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1056 Valid, 678 Invalid, 1484 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [617 Valid, 867 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-02-18 08:16:07,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15927 states. [2023-02-18 08:16:08,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15927 to 15927. [2023-02-18 08:16:08,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15927 states, 10802 states have (on average 1.0456396963525274) internal successors, (11295), 11194 states have internal predecessors, (11295), 3103 states have call successors, (3103), 568 states have call predecessors, (3103), 2018 states have return successors, (7673), 4164 states have call predecessors, (7673), 3069 states have call successors, (7673) [2023-02-18 08:16:08,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15927 states to 15927 states and 22071 transitions. [2023-02-18 08:16:08,373 INFO L78 Accepts]: Start accepts. Automaton has 15927 states and 22071 transitions. Word has length 91 [2023-02-18 08:16:08,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 08:16:08,373 INFO L495 AbstractCegarLoop]: Abstraction has 15927 states and 22071 transitions. [2023-02-18 08:16:08,374 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 45 states have (on average 3.488888888888889) internal successors, (157), 26 states have internal predecessors, (157), 22 states have call successors, (22), 22 states have call predecessors, (22), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 08:16:08,374 INFO L276 IsEmpty]: Start isEmpty. Operand 15927 states and 22071 transitions. [2023-02-18 08:16:08,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2023-02-18 08:16:08,377 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 08:16:08,377 INFO L195 NwaCegarLoop]: trace histogram [10, 8, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 08:16:08,396 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2023-02-18 08:16:08,581 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 08:16:08,582 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2023-02-18 08:16:08,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 08:16:08,582 INFO L85 PathProgramCache]: Analyzing trace with hash 1765664819, now seen corresponding path program 4 times [2023-02-18 08:16:08,582 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 08:16:08,582 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1726467951] [2023-02-18 08:16:08,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 08:16:08,582 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 08:16:08,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 08:16:08,675 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-02-18 08:16:08,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 08:16:08,738 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-02-18 08:16:08,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 08:16:08,782 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-02-18 08:16:08,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 08:16:08,811 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-02-18 08:16:08,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 08:16:08,828 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-02-18 08:16:08,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 08:16:08,845 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2023-02-18 08:16:08,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 08:16:08,864 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2023-02-18 08:16:08,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 08:16:08,870 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2023-02-18 08:16:08,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 08:16:08,878 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 51 proven. 69 refuted. 0 times theorem prover too weak. 101 trivial. 0 not checked. [2023-02-18 08:16:08,879 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 08:16:08,879 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1726467951] [2023-02-18 08:16:08,879 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1726467951] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 08:16:08,879 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1287606697] [2023-02-18 08:16:08,879 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-18 08:16:08,879 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 08:16:08,879 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 08:16:08,880 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 08:16:08,882 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-02-18 08:16:08,955 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-18 08:16:08,955 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 08:16:08,956 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 27 conjunts are in the unsatisfiable core [2023-02-18 08:16:08,958 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 08:16:09,018 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 34 proven. 71 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2023-02-18 08:16:09,019 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 08:16:09,384 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 42 proven. 93 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2023-02-18 08:16:09,385 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1287606697] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 08:16:09,385 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 08:16:09,385 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17, 23] total 42 [2023-02-18 08:16:09,386 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1749162247] [2023-02-18 08:16:09,386 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 08:16:09,386 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2023-02-18 08:16:09,387 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 08:16:09,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2023-02-18 08:16:09,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=207, Invalid=1599, Unknown=0, NotChecked=0, Total=1806 [2023-02-18 08:16:09,389 INFO L87 Difference]: Start difference. First operand 15927 states and 22071 transitions. Second operand has 43 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 33 states have internal predecessors, (80), 9 states have call successors, (11), 3 states have call predecessors, (11), 14 states have return successors, (17), 16 states have call predecessors, (17), 7 states have call successors, (17) [2023-02-18 08:16:13,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 08:16:13,163 INFO L93 Difference]: Finished difference Result 45665 states and 72940 transitions. [2023-02-18 08:16:13,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 143 states. [2023-02-18 08:16:13,163 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 33 states have internal predecessors, (80), 9 states have call successors, (11), 3 states have call predecessors, (11), 14 states have return successors, (17), 16 states have call predecessors, (17), 7 states have call successors, (17) Word has length 91 [2023-02-18 08:16:13,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 08:16:13,318 INFO L225 Difference]: With dead ends: 45665 [2023-02-18 08:16:13,318 INFO L226 Difference]: Without dead ends: 44563 [2023-02-18 08:16:13,348 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 356 GetRequests, 165 SyntacticMatches, 12 SemanticMatches, 179 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12340 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=5454, Invalid=27126, Unknown=0, NotChecked=0, Total=32580 [2023-02-18 08:16:13,348 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 358 mSDsluCounter, 240 mSDsCounter, 0 mSdLazyCounter, 1173 mSolverCounterSat, 984 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 369 SdHoareTripleChecker+Valid, 262 SdHoareTripleChecker+Invalid, 2157 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 984 IncrementalHoareTripleChecker+Valid, 1173 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-02-18 08:16:13,348 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [369 Valid, 262 Invalid, 2157 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [984 Valid, 1173 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-02-18 08:16:13,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44563 states. [2023-02-18 08:16:15,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44563 to 28637. [2023-02-18 08:16:15,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28637 states, 18550 states have (on average 1.0279784366576818) internal successors, (19069), 18925 states have internal predecessors, (19069), 5846 states have call successors, (5846), 676 states have call predecessors, (5846), 4237 states have return successors, (19630), 9035 states have call predecessors, (19630), 5792 states have call successors, (19630) [2023-02-18 08:16:15,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28637 states to 28637 states and 44545 transitions. [2023-02-18 08:16:15,253 INFO L78 Accepts]: Start accepts. Automaton has 28637 states and 44545 transitions. Word has length 91 [2023-02-18 08:16:15,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 08:16:15,253 INFO L495 AbstractCegarLoop]: Abstraction has 28637 states and 44545 transitions. [2023-02-18 08:16:15,254 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 33 states have internal predecessors, (80), 9 states have call successors, (11), 3 states have call predecessors, (11), 14 states have return successors, (17), 16 states have call predecessors, (17), 7 states have call successors, (17) [2023-02-18 08:16:15,254 INFO L276 IsEmpty]: Start isEmpty. Operand 28637 states and 44545 transitions. [2023-02-18 08:16:15,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2023-02-18 08:16:15,261 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 08:16:15,261 INFO L195 NwaCegarLoop]: trace histogram [20, 20, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1] [2023-02-18 08:16:15,269 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2023-02-18 08:16:15,465 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 08:16:15,465 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ackermannErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2023-02-18 08:16:15,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 08:16:15,466 INFO L85 PathProgramCache]: Analyzing trace with hash 951429890, now seen corresponding path program 2 times [2023-02-18 08:16:15,466 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 08:16:15,466 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2004365920] [2023-02-18 08:16:15,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 08:16:15,466 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 08:16:15,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 08:16:15,779 INFO L134 CoverageAnalysis]: Checked inductivity of 894 backedges. 0 proven. 867 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2023-02-18 08:16:15,779 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 08:16:15,779 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2004365920] [2023-02-18 08:16:15,780 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2004365920] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 08:16:15,780 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2039891049] [2023-02-18 08:16:15,780 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-18 08:16:15,780 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 08:16:15,780 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 08:16:15,782 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 08:16:15,784 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2023-02-18 08:16:15,876 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-18 08:16:15,876 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 08:16:15,877 INFO L263 TraceCheckSpWp]: Trace formula consists of 342 conjuncts, 42 conjunts are in the unsatisfiable core [2023-02-18 08:16:15,878 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 08:16:16,145 INFO L134 CoverageAnalysis]: Checked inductivity of 894 backedges. 0 proven. 867 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2023-02-18 08:16:16,145 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 08:16:16,595 INFO L134 CoverageAnalysis]: Checked inductivity of 894 backedges. 0 proven. 867 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2023-02-18 08:16:16,596 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2039891049] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 08:16:16,596 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 08:16:16,596 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 47 [2023-02-18 08:16:16,596 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1863832644] [2023-02-18 08:16:16,596 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 08:16:16,596 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2023-02-18 08:16:16,596 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 08:16:16,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2023-02-18 08:16:16,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=556, Invalid=1700, Unknown=0, NotChecked=0, Total=2256 [2023-02-18 08:16:16,598 INFO L87 Difference]: Start difference. First operand 28637 states and 44545 transitions. Second operand has 48 states, 47 states have (on average 4.340425531914893) internal successors, (204), 26 states have internal predecessors, (204), 22 states have call successors, (40), 22 states have call predecessors, (40), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 08:16:20,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 08:16:20,540 INFO L93 Difference]: Finished difference Result 64750 states and 101363 transitions. [2023-02-18 08:16:20,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2023-02-18 08:16:20,541 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 47 states have (on average 4.340425531914893) internal successors, (204), 26 states have internal predecessors, (204), 22 states have call successors, (40), 22 states have call predecessors, (40), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 141 [2023-02-18 08:16:20,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 08:16:20,891 INFO L225 Difference]: With dead ends: 64750 [2023-02-18 08:16:20,891 INFO L226 Difference]: Without dead ends: 64749 [2023-02-18 08:16:20,916 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 365 GetRequests, 229 SyntacticMatches, 47 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2560 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=2534, Invalid=5656, Unknown=0, NotChecked=0, Total=8190 [2023-02-18 08:16:20,916 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 2174 mSDsluCounter, 524 mSDsCounter, 0 mSdLazyCounter, 908 mSolverCounterSat, 873 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2177 SdHoareTripleChecker+Valid, 551 SdHoareTripleChecker+Invalid, 1781 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 873 IncrementalHoareTripleChecker+Valid, 908 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-02-18 08:16:20,916 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2177 Valid, 551 Invalid, 1781 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [873 Valid, 908 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-02-18 08:16:20,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64749 states. [2023-02-18 08:16:24,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64749 to 64697. [2023-02-18 08:16:24,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64697 states, 41998 states have (on average 1.0286442211533882) internal successors, (43201), 42865 states have internal predecessors, (43201), 13190 states have call successors, (13190), 1564 states have call predecessors, (13190), 9505 states have return successors, (44950), 20267 states have call predecessors, (44950), 13076 states have call successors, (44950) [2023-02-18 08:16:24,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64697 states to 64697 states and 101341 transitions. [2023-02-18 08:16:24,979 INFO L78 Accepts]: Start accepts. Automaton has 64697 states and 101341 transitions. Word has length 141 [2023-02-18 08:16:24,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 08:16:24,980 INFO L495 AbstractCegarLoop]: Abstraction has 64697 states and 101341 transitions. [2023-02-18 08:16:24,980 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 47 states have (on average 4.340425531914893) internal successors, (204), 26 states have internal predecessors, (204), 22 states have call successors, (40), 22 states have call predecessors, (40), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 08:16:24,980 INFO L276 IsEmpty]: Start isEmpty. Operand 64697 states and 101341 transitions. [2023-02-18 08:16:24,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2023-02-18 08:16:24,994 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 08:16:24,995 INFO L195 NwaCegarLoop]: trace histogram [30, 23, 19, 19, 19, 19, 18, 18, 17, 7, 7, 7, 7, 7, 7, 6, 6, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1] [2023-02-18 08:16:25,012 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2023-02-18 08:16:25,199 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2023-02-18 08:16:25,199 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ackermannErr7ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2023-02-18 08:16:25,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 08:16:25,199 INFO L85 PathProgramCache]: Analyzing trace with hash -154049420, now seen corresponding path program 1 times [2023-02-18 08:16:25,199 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 08:16:25,199 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1418384601] [2023-02-18 08:16:25,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 08:16:25,199 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 08:16:25,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 08:16:25,535 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2023-02-18 08:16:25,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 08:16:25,630 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-02-18 08:16:25,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 08:16:25,708 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-02-18 08:16:25,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 08:16:25,728 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-02-18 08:16:25,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 08:16:25,746 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-02-18 08:16:25,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 08:16:25,758 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-02-18 08:16:25,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 08:16:25,770 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2023-02-18 08:16:25,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 08:16:25,784 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2023-02-18 08:16:25,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 08:16:25,826 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-02-18 08:16:25,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 08:16:25,860 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-02-18 08:16:25,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 08:16:25,886 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-02-18 08:16:25,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 08:16:25,906 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-02-18 08:16:25,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 08:16:25,918 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-02-18 08:16:25,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 08:16:25,920 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2023-02-18 08:16:25,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 08:16:25,921 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2023-02-18 08:16:25,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 08:16:25,929 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2023-02-18 08:16:25,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 08:16:25,931 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2023-02-18 08:16:25,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 08:16:25,934 INFO L134 CoverageAnalysis]: Checked inductivity of 2355 backedges. 805 proven. 214 refuted. 0 times theorem prover too weak. 1336 trivial. 0 not checked. [2023-02-18 08:16:25,934 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 08:16:25,934 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1418384601] [2023-02-18 08:16:25,934 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1418384601] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 08:16:25,934 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [746368185] [2023-02-18 08:16:25,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 08:16:25,934 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 08:16:25,934 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 08:16:25,935 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 08:16:25,937 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2023-02-18 08:16:26,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 08:16:26,069 INFO L263 TraceCheckSpWp]: Trace formula consists of 616 conjuncts, 25 conjunts are in the unsatisfiable core [2023-02-18 08:16:26,072 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 08:16:26,144 INFO L134 CoverageAnalysis]: Checked inductivity of 2355 backedges. 793 proven. 216 refuted. 0 times theorem prover too weak. 1346 trivial. 0 not checked. [2023-02-18 08:16:26,145 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 08:16:26,467 INFO L134 CoverageAnalysis]: Checked inductivity of 2355 backedges. 809 proven. 263 refuted. 0 times theorem prover too weak. 1283 trivial. 0 not checked. [2023-02-18 08:16:26,467 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [746368185] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 08:16:26,467 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 08:16:26,467 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 21] total 27 [2023-02-18 08:16:26,467 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1750438830] [2023-02-18 08:16:26,468 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 08:16:26,469 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-02-18 08:16:26,469 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 08:16:26,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-02-18 08:16:26,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=589, Unknown=0, NotChecked=0, Total=702 [2023-02-18 08:16:26,470 INFO L87 Difference]: Start difference. First operand 64697 states and 101341 transitions. Second operand has 27 states, 27 states have (on average 4.555555555555555) internal successors, (123), 24 states have internal predecessors, (123), 16 states have call successors, (18), 2 states have call predecessors, (18), 14 states have return successors, (29), 12 states have call predecessors, (29), 15 states have call successors, (29) [2023-02-18 08:16:32,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 08:16:32,092 INFO L93 Difference]: Finished difference Result 152890 states and 310323 transitions. [2023-02-18 08:16:32,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-02-18 08:16:32,092 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 266 [2023-02-18 08:16:32,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 08:16:32,722 INFO L225 Difference]: With dead ends: 152890 [2023-02-18 08:16:32,722 INFO L226 Difference]: Without dead ends: 94897 [2023-02-18 08:16:33,004 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 609 GetRequests, 536 SyntacticMatches, 30 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 561 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=423, Invalid=1557, Unknown=0, NotChecked=0, Total=1980 [2023-02-18 08:16:33,004 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 144 mSDsluCounter, 242 mSDsCounter, 0 mSdLazyCounter, 549 mSolverCounterSat, 181 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 149 SdHoareTripleChecker+Valid, 276 SdHoareTripleChecker+Invalid, 730 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 181 IncrementalHoareTripleChecker+Valid, 549 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-18 08:16:33,005 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [149 Valid, 276 Invalid, 730 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [181 Valid, 549 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-18 08:16:33,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94897 states. [2023-02-18 08:16:38,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94897 to 64479. [2023-02-18 08:16:38,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64479 states, 41889 states have (on average 1.0287187567141731) internal successors, (43092), 42756 states have internal predecessors, (43092), 13081 states have call successors, (13081), 1564 states have call predecessors, (13081), 9505 states have return successors, (44883), 20158 states have call predecessors, (44883), 12967 states have call successors, (44883) [2023-02-18 08:16:38,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64479 states to 64479 states and 101056 transitions. [2023-02-18 08:16:38,327 INFO L78 Accepts]: Start accepts. Automaton has 64479 states and 101056 transitions. Word has length 266 [2023-02-18 08:16:38,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 08:16:38,327 INFO L495 AbstractCegarLoop]: Abstraction has 64479 states and 101056 transitions. [2023-02-18 08:16:38,327 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) [2023-02-18 08:16:38,328 INFO L276 IsEmpty]: Start isEmpty. Operand 64479 states and 101056 transitions. [2023-02-18 08:16:38,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 253 [2023-02-18 08:16:38,344 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 08:16:38,344 INFO L195 NwaCegarLoop]: trace histogram [28, 21, 17, 14, 14, 14, 14, 14, 14, 11, 11, 10, 10, 10, 10, 8, 8, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1] [2023-02-18 08:16:38,349 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2023-02-18 08:16:38,544 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2023-02-18 08:16:38,545 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2023-02-18 08:16:38,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 08:16:38,545 INFO L85 PathProgramCache]: Analyzing trace with hash 1049268364, now seen corresponding path program 5 times [2023-02-18 08:16:38,545 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 08:16:38,545 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [952610264] [2023-02-18 08:16:38,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 08:16:38,545 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 08:16:38,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat