./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 e8d55036 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-?-e8d5503-m [2023-02-15 22:59:48,098 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-02-15 22:59:48,099 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-02-15 22:59:48,123 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-02-15 22:59:48,123 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-02-15 22:59:48,124 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-02-15 22:59:48,126 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-02-15 22:59:48,127 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-02-15 22:59:48,129 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-02-15 22:59:48,135 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-02-15 22:59:48,136 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-02-15 22:59:48,137 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-02-15 22:59:48,139 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-02-15 22:59:48,141 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-02-15 22:59:48,144 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-02-15 22:59:48,147 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-02-15 22:59:48,149 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-02-15 22:59:48,150 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-02-15 22:59:48,151 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-02-15 22:59:48,152 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-02-15 22:59:48,157 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-02-15 22:59:48,158 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-02-15 22:59:48,159 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-02-15 22:59:48,160 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-02-15 22:59:48,163 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-02-15 22:59:48,164 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-02-15 22:59:48,165 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-02-15 22:59:48,166 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-02-15 22:59:48,166 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-02-15 22:59:48,167 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-02-15 22:59:48,167 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-02-15 22:59:48,168 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-02-15 22:59:48,168 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-02-15 22:59:48,169 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-02-15 22:59:48,170 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-02-15 22:59:48,170 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-02-15 22:59:48,171 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-02-15 22:59:48,171 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-02-15 22:59:48,171 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-02-15 22:59:48,172 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-02-15 22:59:48,173 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-02-15 22:59:48,173 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Overflow-64bit-Automizer_Default.epf [2023-02-15 22:59:48,204 INFO L113 SettingsManager]: Loading preferences was successful [2023-02-15 22:59:48,204 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-02-15 22:59:48,205 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-02-15 22:59:48,205 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-02-15 22:59:48,206 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-02-15 22:59:48,206 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-02-15 22:59:48,206 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-02-15 22:59:48,207 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-02-15 22:59:48,207 INFO L138 SettingsManager]: * Use SBE=true [2023-02-15 22:59:48,207 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-02-15 22:59:48,207 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-02-15 22:59:48,208 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-02-15 22:59:48,208 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-02-15 22:59:48,208 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-02-15 22:59:48,208 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-02-15 22:59:48,209 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-02-15 22:59:48,209 INFO L138 SettingsManager]: * Check absence of signed integer overflows=true [2023-02-15 22:59:48,209 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-02-15 22:59:48,209 INFO L138 SettingsManager]: * Use constant arrays=true [2023-02-15 22:59:48,210 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-02-15 22:59:48,210 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-02-15 22:59:48,210 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-02-15 22:59:48,210 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-02-15 22:59:48,210 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-15 22:59:48,211 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-02-15 22:59:48,211 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-02-15 22:59:48,211 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-02-15 22:59:48,211 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-02-15 22:59:48,211 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-02-15 22:59:48,212 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-02-15 22:59:48,212 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-02-15 22:59:48,212 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-02-15 22:59:48,212 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-02-15 22:59:48,212 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-02-15 22:59:48,213 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 380ed529f726f53285b49ce40e57404dbe066b029b8c3af7ce337366515780a5 [2023-02-15 22:59:48,458 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-02-15 22:59:48,487 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-02-15 22:59:48,489 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-02-15 22:59:48,490 INFO L271 PluginConnector]: Initializing CDTParser... [2023-02-15 22:59:48,491 INFO L275 PluginConnector]: CDTParser initialized [2023-02-15 22:59:48,492 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/termination-numeric/Ackermann01-1.c [2023-02-15 22:59:49,715 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-02-15 22:59:49,865 INFO L351 CDTParser]: Found 1 translation units. [2023-02-15 22:59:49,866 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/termination-numeric/Ackermann01-1.c [2023-02-15 22:59:49,871 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2dc2198ac/fc1b13c2a1cb4c32ba93dfc45b34f8f3/FLAG7986f7704 [2023-02-15 22:59:49,887 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2dc2198ac/fc1b13c2a1cb4c32ba93dfc45b34f8f3 [2023-02-15 22:59:49,889 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-02-15 22:59:49,889 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-02-15 22:59:49,890 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-02-15 22:59:49,890 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-02-15 22:59:49,892 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-02-15 22:59:49,893 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.02 10:59:49" (1/1) ... [2023-02-15 22:59:49,894 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2296f27b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 10:59:49, skipping insertion in model container [2023-02-15 22:59:49,894 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.02 10:59:49" (1/1) ... [2023-02-15 22:59:49,903 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-02-15 22:59:49,922 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-02-15 22:59:50,045 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] [2023-02-15 22:59:50,045 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-15 22:59:50,056 INFO L203 MainTranslator]: Completed pre-run [2023-02-15 22:59:50,080 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] [2023-02-15 22:59:50,081 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-15 22:59:50,092 INFO L208 MainTranslator]: Completed translation [2023-02-15 22:59:50,093 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 10:59:50 WrapperNode [2023-02-15 22:59:50,093 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-02-15 22:59:50,094 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-02-15 22:59:50,094 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-02-15 22:59:50,095 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-02-15 22:59:50,101 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 10:59:50" (1/1) ... [2023-02-15 22:59:50,108 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 10:59:50" (1/1) ... [2023-02-15 22:59:50,121 INFO L138 Inliner]: procedures = 13, calls = 11, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 32 [2023-02-15 22:59:50,122 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-02-15 22:59:50,122 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-02-15 22:59:50,123 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-02-15 22:59:50,123 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-02-15 22:59:50,130 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 10:59:50" (1/1) ... [2023-02-15 22:59:50,131 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 10:59:50" (1/1) ... [2023-02-15 22:59:50,133 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 10:59:50" (1/1) ... [2023-02-15 22:59:50,133 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 10:59:50" (1/1) ... [2023-02-15 22:59:50,135 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 10:59:50" (1/1) ... [2023-02-15 22:59:50,137 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 10:59:50" (1/1) ... [2023-02-15 22:59:50,137 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 10:59:50" (1/1) ... [2023-02-15 22:59:50,138 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 10:59:50" (1/1) ... [2023-02-15 22:59:50,139 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-02-15 22:59:50,140 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-02-15 22:59:50,140 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-02-15 22:59:50,140 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-02-15 22:59:50,153 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 10:59:50" (1/1) ... [2023-02-15 22:59:50,159 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-15 22:59:50,166 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 22:59:50,177 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) [2023-02-15 22:59:50,179 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 [2023-02-15 22:59:50,206 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-02-15 22:59:50,207 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-02-15 22:59:50,207 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-02-15 22:59:50,207 INFO L130 BoogieDeclarations]: Found specification of procedure ackermann [2023-02-15 22:59:50,207 INFO L138 BoogieDeclarations]: Found implementation of procedure ackermann [2023-02-15 22:59:50,207 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-02-15 22:59:50,259 INFO L235 CfgBuilder]: Building ICFG [2023-02-15 22:59:50,260 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2023-02-15 22:59:50,372 INFO L276 CfgBuilder]: Performing block encoding [2023-02-15 22:59:50,394 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-02-15 22:59:50,395 INFO L300 CfgBuilder]: Removed 0 assume(true) statements. [2023-02-15 22:59:50,396 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.02 10:59:50 BoogieIcfgContainer [2023-02-15 22:59:50,397 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-02-15 22:59:50,407 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-02-15 22:59:50,407 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-02-15 22:59:50,415 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-02-15 22:59:50,415 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.02 10:59:49" (1/3) ... [2023-02-15 22:59:50,416 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@29846cdc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.02 10:59:50, skipping insertion in model container [2023-02-15 22:59:50,416 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 10:59:50" (2/3) ... [2023-02-15 22:59:50,416 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@29846cdc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.02 10:59:50, skipping insertion in model container [2023-02-15 22:59:50,417 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.02 10:59:50" (3/3) ... [2023-02-15 22:59:50,418 INFO L112 eAbstractionObserver]: Analyzing ICFG Ackermann01-1.c [2023-02-15 22:59:50,462 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-02-15 22:59:50,463 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 8 error locations. [2023-02-15 22:59:50,509 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-02-15 22:59:50,516 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;@38f09e78, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-02-15 22:59:50,516 INFO L358 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2023-02-15 22:59:50,521 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) [2023-02-15 22:59:50,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-02-15 22:59:50,528 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 22:59:50,529 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 22:59:50,530 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2023-02-15 22:59:50,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 22:59:50,534 INFO L85 PathProgramCache]: Analyzing trace with hash 180762217, now seen corresponding path program 1 times [2023-02-15 22:59:50,542 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 22:59:50,543 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [68056088] [2023-02-15 22:59:50,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 22:59:50,543 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 22:59:50,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:59:50,757 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 22:59:50,757 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 22:59:50,758 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [68056088] [2023-02-15 22:59:50,758 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [68056088] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 22:59:50,758 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 22:59:50,759 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-15 22:59:50,760 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1510180237] [2023-02-15 22:59:50,761 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 22:59:50,764 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-15 22:59:50,765 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 22:59:50,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-15 22:59:50,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-02-15 22:59:50,789 INFO L87 Difference]: Start difference. First operand has 38 states, 24 states have (on average 1.5416666666666667) internal successors, (37), 32 states have internal predecessors, (37), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 5 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 22:59:50,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 22:59:50,972 INFO L93 Difference]: Finished difference Result 73 states and 85 transitions. [2023-02-15 22:59:50,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-15 22:59:50,974 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2023-02-15 22:59:50,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 22:59:50,982 INFO L225 Difference]: With dead ends: 73 [2023-02-15 22:59:50,982 INFO L226 Difference]: Without dead ends: 59 [2023-02-15 22:59:50,984 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 [2023-02-15 22:59:50,988 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 55 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 22:59:50,989 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [57 Valid, 119 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 22:59:51,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2023-02-15 22:59:51,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 51. [2023-02-15 22:59:51,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 34 states have (on average 1.5294117647058822) internal successors, (52), 42 states have internal predecessors, (52), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-02-15 22:59:51,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 65 transitions. [2023-02-15 22:59:51,027 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 65 transitions. Word has length 8 [2023-02-15 22:59:51,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 22:59:51,027 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 65 transitions. [2023-02-15 22:59:51,028 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 22:59:51,028 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 65 transitions. [2023-02-15 22:59:51,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2023-02-15 22:59:51,029 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 22:59:51,029 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 22:59:51,029 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-02-15 22:59:51,030 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2023-02-15 22:59:51,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 22:59:51,035 INFO L85 PathProgramCache]: Analyzing trace with hash 1308666490, now seen corresponding path program 1 times [2023-02-15 22:59:51,036 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 22:59:51,036 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [852241533] [2023-02-15 22:59:51,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 22:59:51,036 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 22:59:51,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:59:51,146 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 22:59:51,147 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 22:59:51,148 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [852241533] [2023-02-15 22:59:51,148 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [852241533] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 22:59:51,149 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 22:59:51,149 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-15 22:59:51,149 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [131396323] [2023-02-15 22:59:51,149 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 22:59:51,151 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-15 22:59:51,151 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 22:59:51,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-15 22:59:51,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-02-15 22:59:51,153 INFO L87 Difference]: Start difference. First operand 51 states and 65 transitions. Second operand has 5 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 22:59:51,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 22:59:51,272 INFO L93 Difference]: Finished difference Result 101 states and 137 transitions. [2023-02-15 22:59:51,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-15 22:59:51,274 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 [2023-02-15 22:59:51,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 22:59:51,279 INFO L225 Difference]: With dead ends: 101 [2023-02-15 22:59:51,280 INFO L226 Difference]: Without dead ends: 95 [2023-02-15 22:59:51,281 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 [2023-02-15 22:59:51,285 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 48 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 22:59:51,287 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 91 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 22:59:51,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2023-02-15 22:59:51,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 85. [2023-02-15 22:59:51,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 61 states have (on average 1.5081967213114753) internal successors, (92), 70 states have internal predecessors, (92), 13 states have call successors, (13), 4 states have call predecessors, (13), 3 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2023-02-15 22:59:51,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 115 transitions. [2023-02-15 22:59:51,310 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 115 transitions. Word has length 9 [2023-02-15 22:59:51,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 22:59:51,311 INFO L495 AbstractCegarLoop]: Abstraction has 85 states and 115 transitions. [2023-02-15 22:59:51,312 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) [2023-02-15 22:59:51,313 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 115 transitions. [2023-02-15 22:59:51,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2023-02-15 22:59:51,314 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 22:59:51,314 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 22:59:51,315 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-02-15 22:59:51,315 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2023-02-15 22:59:51,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 22:59:51,317 INFO L85 PathProgramCache]: Analyzing trace with hash 1308661493, now seen corresponding path program 1 times [2023-02-15 22:59:51,318 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 22:59:51,318 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [216929770] [2023-02-15 22:59:51,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 22:59:51,319 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 22:59:51,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:59:51,408 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 22:59:51,409 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 22:59:51,409 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [216929770] [2023-02-15 22:59:51,410 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [216929770] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 22:59:51,411 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 22:59:51,411 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-15 22:59:51,411 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1646239499] [2023-02-15 22:59:51,411 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 22:59:51,412 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-15 22:59:51,412 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 22:59:51,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-15 22:59:51,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-02-15 22:59:51,414 INFO L87 Difference]: Start difference. First operand 85 states and 115 transitions. Second operand has 5 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 22:59:51,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 22:59:51,501 INFO L93 Difference]: Finished difference Result 114 states and 152 transitions. [2023-02-15 22:59:51,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-15 22:59:51,502 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 [2023-02-15 22:59:51,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 22:59:51,506 INFO L225 Difference]: With dead ends: 114 [2023-02-15 22:59:51,506 INFO L226 Difference]: Without dead ends: 110 [2023-02-15 22:59:51,508 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 [2023-02-15 22:59:51,510 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 49 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 22:59:51,512 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 93 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 22:59:51,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2023-02-15 22:59:51,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 102. [2023-02-15 22:59:51,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 74 states have (on average 1.445945945945946) internal successors, (107), 83 states have internal predecessors, (107), 16 states have call successors, (16), 5 states have call predecessors, (16), 4 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2023-02-15 22:59:51,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 136 transitions. [2023-02-15 22:59:51,536 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 136 transitions. Word has length 9 [2023-02-15 22:59:51,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 22:59:51,537 INFO L495 AbstractCegarLoop]: Abstraction has 102 states and 136 transitions. [2023-02-15 22:59:51,537 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) [2023-02-15 22:59:51,538 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 136 transitions. [2023-02-15 22:59:51,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-02-15 22:59:51,539 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 22:59:51,539 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 22:59:51,539 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-02-15 22:59:51,540 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ackermannErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2023-02-15 22:59:51,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 22:59:51,540 INFO L85 PathProgramCache]: Analyzing trace with hash 1913955596, now seen corresponding path program 1 times [2023-02-15 22:59:51,540 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 22:59:51,541 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1127344052] [2023-02-15 22:59:51,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 22:59:51,541 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 22:59:51,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:59:51,626 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 22:59:51,627 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 22:59:51,627 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1127344052] [2023-02-15 22:59:51,627 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1127344052] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 22:59:51,627 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 22:59:51,627 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-15 22:59:51,628 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [473489757] [2023-02-15 22:59:51,628 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 22:59:51,628 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-15 22:59:51,628 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 22:59:51,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-15 22:59:51,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-02-15 22:59:51,629 INFO L87 Difference]: Start difference. First operand 102 states and 136 transitions. Second operand has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 22:59:51,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 22:59:51,683 INFO L93 Difference]: Finished difference Result 102 states and 136 transitions. [2023-02-15 22:59:51,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-02-15 22:59:51,683 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 [2023-02-15 22:59:51,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 22:59:51,686 INFO L225 Difference]: With dead ends: 102 [2023-02-15 22:59:51,686 INFO L226 Difference]: Without dead ends: 100 [2023-02-15 22:59:51,686 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 [2023-02-15 22:59:51,696 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 [2023-02-15 22:59:51,697 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] [2023-02-15 22:59:51,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2023-02-15 22:59:51,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 100. [2023-02-15 22:59:51,708 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) [2023-02-15 22:59:51,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 126 transitions. [2023-02-15 22:59:51,709 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 126 transitions. Word has length 10 [2023-02-15 22:59:51,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 22:59:51,709 INFO L495 AbstractCegarLoop]: Abstraction has 100 states and 126 transitions. [2023-02-15 22:59:51,709 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) [2023-02-15 22:59:51,710 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 126 transitions. [2023-02-15 22:59:51,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-02-15 22:59:51,710 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 22:59:51,710 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 22:59:51,710 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-02-15 22:59:51,711 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2023-02-15 22:59:51,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 22:59:51,711 INFO L85 PathProgramCache]: Analyzing trace with hash 1669645175, now seen corresponding path program 1 times [2023-02-15 22:59:51,711 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 22:59:51,711 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1253747163] [2023-02-15 22:59:51,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 22:59:51,712 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 22:59:51,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:59:51,752 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 22:59:51,752 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 22:59:51,752 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1253747163] [2023-02-15 22:59:51,753 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1253747163] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 22:59:51,753 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 22:59:51,753 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-15 22:59:51,753 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1463979058] [2023-02-15 22:59:51,753 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 22:59:51,753 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-15 22:59:51,753 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 22:59:51,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-15 22:59:51,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-15 22:59:51,754 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) [2023-02-15 22:59:51,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 22:59:51,816 INFO L93 Difference]: Finished difference Result 168 states and 221 transitions. [2023-02-15 22:59:51,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-15 22:59:51,816 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 [2023-02-15 22:59:51,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 22:59:51,818 INFO L225 Difference]: With dead ends: 168 [2023-02-15 22:59:51,819 INFO L226 Difference]: Without dead ends: 97 [2023-02-15 22:59:51,823 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 [2023-02-15 22:59:51,824 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 [2023-02-15 22:59:51,825 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] [2023-02-15 22:59:51,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2023-02-15 22:59:51,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 96. [2023-02-15 22:59:51,838 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) [2023-02-15 22:59:51,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 119 transitions. [2023-02-15 22:59:51,839 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 119 transitions. Word has length 15 [2023-02-15 22:59:51,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 22:59:51,840 INFO L495 AbstractCegarLoop]: Abstraction has 96 states and 119 transitions. [2023-02-15 22:59:51,840 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) [2023-02-15 22:59:51,840 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 119 transitions. [2023-02-15 22:59:51,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-02-15 22:59:51,845 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 22:59:51,845 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 22:59:51,845 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-02-15 22:59:51,846 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ackermannErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2023-02-15 22:59:51,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 22:59:51,855 INFO L85 PathProgramCache]: Analyzing trace with hash 1669645399, now seen corresponding path program 1 times [2023-02-15 22:59:51,855 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 22:59:51,855 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [566173863] [2023-02-15 22:59:51,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 22:59:51,855 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 22:59:51,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:59:51,940 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 22:59:51,942 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 22:59:51,942 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [566173863] [2023-02-15 22:59:51,942 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [566173863] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 22:59:51,942 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1825781537] [2023-02-15 22:59:51,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 22:59:51,943 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 22:59:51,943 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 22:59:51,953 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) [2023-02-15 22:59:51,972 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-02-15 22:59:51,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:59:52,000 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 6 conjunts are in the unsatisfiable core [2023-02-15 22:59:52,005 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 22:59:52,091 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 22:59:52,091 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 22:59:52,163 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 22:59:52,163 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1825781537] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 22:59:52,163 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 22:59:52,163 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 11 [2023-02-15 22:59:52,164 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1014072723] [2023-02-15 22:59:52,164 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 22:59:52,164 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-02-15 22:59:52,164 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 22:59:52,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-02-15 22:59:52,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2023-02-15 22:59:52,165 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) [2023-02-15 22:59:52,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 22:59:52,398 INFO L93 Difference]: Finished difference Result 274 states and 356 transitions. [2023-02-15 22:59:52,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-02-15 22:59:52,398 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 [2023-02-15 22:59:52,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 22:59:52,401 INFO L225 Difference]: With dead ends: 274 [2023-02-15 22:59:52,401 INFO L226 Difference]: Without dead ends: 272 [2023-02-15 22:59:52,401 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=104, Invalid=238, Unknown=0, NotChecked=0, Total=342 [2023-02-15 22:59:52,402 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 236 mSDsluCounter, 134 mSDsCounter, 0 mSdLazyCounter, 151 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 242 SdHoareTripleChecker+Valid, 163 SdHoareTripleChecker+Invalid, 242 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 151 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 22:59:52,402 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [242 Valid, 163 Invalid, 242 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 151 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 22:59:52,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2023-02-15 22:59:52,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 236. [2023-02-15 22:59:52,430 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) [2023-02-15 22:59:52,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 299 transitions. [2023-02-15 22:59:52,432 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 299 transitions. Word has length 15 [2023-02-15 22:59:52,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 22:59:52,432 INFO L495 AbstractCegarLoop]: Abstraction has 236 states and 299 transitions. [2023-02-15 22:59:52,433 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) [2023-02-15 22:59:52,433 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 299 transitions. [2023-02-15 22:59:52,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-02-15 22:59:52,433 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 22:59:52,433 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 22:59:52,447 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-02-15 22:59:52,634 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-02-15 22:59:52,634 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2023-02-15 22:59:52,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 22:59:52,635 INFO L85 PathProgramCache]: Analyzing trace with hash 1422985811, now seen corresponding path program 1 times [2023-02-15 22:59:52,635 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 22:59:52,635 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1117786994] [2023-02-15 22:59:52,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 22:59:52,635 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 22:59:52,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:59:52,710 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 22:59:52,711 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 22:59:52,711 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1117786994] [2023-02-15 22:59:52,711 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1117786994] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 22:59:52,711 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2018850125] [2023-02-15 22:59:52,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 22:59:52,711 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 22:59:52,711 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 22:59:52,712 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) [2023-02-15 22:59:52,715 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-02-15 22:59:52,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:59:52,748 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjunts are in the unsatisfiable core [2023-02-15 22:59:52,749 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 22:59:52,840 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 22:59:52,840 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 22:59:52,919 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 22:59:52,920 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2018850125] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 22:59:52,920 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 22:59:52,920 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 11 [2023-02-15 22:59:52,920 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2081276902] [2023-02-15 22:59:52,920 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 22:59:52,921 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-02-15 22:59:52,921 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 22:59:52,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-02-15 22:59:52,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2023-02-15 22:59:52,924 INFO L87 Difference]: Start difference. First operand 236 states and 299 transitions. Second operand has 12 states, 10 states have (on average 2.6) internal successors, (26), 8 states have internal predecessors, (26), 4 states have call successors, (4), 4 states have call predecessors, (4), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 22:59:53,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 22:59:53,189 INFO L93 Difference]: Finished difference Result 512 states and 695 transitions. [2023-02-15 22:59:53,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-02-15 22:59:53,189 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 2.6) internal successors, (26), 8 states have internal predecessors, (26), 4 states have call successors, (4), 4 states have call predecessors, (4), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2023-02-15 22:59:53,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 22:59:53,197 INFO L225 Difference]: With dead ends: 512 [2023-02-15 22:59:53,198 INFO L226 Difference]: Without dead ends: 510 [2023-02-15 22:59:53,199 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=116, Invalid=264, Unknown=0, NotChecked=0, Total=380 [2023-02-15 22:59:53,200 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 164 mSDsluCounter, 150 mSDsCounter, 0 mSdLazyCounter, 192 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 167 SdHoareTripleChecker+Valid, 178 SdHoareTripleChecker+Invalid, 250 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 192 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 22:59:53,200 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [167 Valid, 178 Invalid, 250 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 192 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 22:59:53,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 510 states. [2023-02-15 22:59:53,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 510 to 445. [2023-02-15 22:59:53,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 445 states, 347 states have (on average 1.2276657060518732) internal successors, (426), 354 states have internal predecessors, (426), 69 states have call successors, (69), 24 states have call predecessors, (69), 23 states have return successors, (66), 66 states have call predecessors, (66), 66 states have call successors, (66) [2023-02-15 22:59:53,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 445 states to 445 states and 561 transitions. [2023-02-15 22:59:53,257 INFO L78 Accepts]: Start accepts. Automaton has 445 states and 561 transitions. Word has length 16 [2023-02-15 22:59:53,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 22:59:53,258 INFO L495 AbstractCegarLoop]: Abstraction has 445 states and 561 transitions. [2023-02-15 22:59:53,258 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 2.6) internal successors, (26), 8 states have internal predecessors, (26), 4 states have call successors, (4), 4 states have call predecessors, (4), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 22:59:53,258 INFO L276 IsEmpty]: Start isEmpty. Operand 445 states and 561 transitions. [2023-02-15 22:59:53,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-02-15 22:59:53,261 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 22:59:53,261 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] [2023-02-15 22:59:53,272 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-02-15 22:59:53,467 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2023-02-15 22:59:53,467 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2023-02-15 22:59:53,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 22:59:53,468 INFO L85 PathProgramCache]: Analyzing trace with hash 1106403678, now seen corresponding path program 1 times [2023-02-15 22:59:53,468 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 22:59:53,468 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1796963639] [2023-02-15 22:59:53,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 22:59:53,468 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 22:59:53,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:59:53,531 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-02-15 22:59:53,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:59:53,562 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-15 22:59:53,563 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 22:59:53,564 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1796963639] [2023-02-15 22:59:53,564 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1796963639] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 22:59:53,564 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [866702385] [2023-02-15 22:59:53,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 22:59:53,565 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 22:59:53,565 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 22:59:53,566 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) [2023-02-15 22:59:53,568 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-02-15 22:59:53,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:59:53,602 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 6 conjunts are in the unsatisfiable core [2023-02-15 22:59:53,603 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 22:59:53,668 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-15 22:59:53,669 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-15 22:59:53,669 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [866702385] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 22:59:53,669 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-02-15 22:59:53,669 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7] total 12 [2023-02-15 22:59:53,669 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1730589527] [2023-02-15 22:59:53,669 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 22:59:53,670 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-02-15 22:59:53,670 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 22:59:53,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-02-15 22:59:53,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2023-02-15 22:59:53,671 INFO L87 Difference]: Start difference. First operand 445 states and 561 transitions. Second operand has 7 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-15 22:59:53,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 22:59:53,835 INFO L93 Difference]: Finished difference Result 478 states and 600 transitions. [2023-02-15 22:59:53,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-02-15 22:59:53,835 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 24 [2023-02-15 22:59:53,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 22:59:53,838 INFO L225 Difference]: With dead ends: 478 [2023-02-15 22:59:53,838 INFO L226 Difference]: Without dead ends: 477 [2023-02-15 22:59:53,839 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2023-02-15 22:59:53,839 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 45 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 22:59:53,840 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 124 Invalid, 112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 22:59:53,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 477 states. [2023-02-15 22:59:53,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 477 to 444. [2023-02-15 22:59:53,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 444 states, 347 states have (on average 1.2161383285302594) internal successors, (422), 353 states have internal predecessors, (422), 69 states have call successors, (69), 24 states have call predecessors, (69), 23 states have return successors, (66), 66 states have call predecessors, (66), 66 states have call successors, (66) [2023-02-15 22:59:53,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 444 states to 444 states and 557 transitions. [2023-02-15 22:59:53,869 INFO L78 Accepts]: Start accepts. Automaton has 444 states and 557 transitions. Word has length 24 [2023-02-15 22:59:53,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 22:59:53,870 INFO L495 AbstractCegarLoop]: Abstraction has 444 states and 557 transitions. [2023-02-15 22:59:53,870 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-15 22:59:53,870 INFO L276 IsEmpty]: Start isEmpty. Operand 444 states and 557 transitions. [2023-02-15 22:59:53,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-02-15 22:59:53,871 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 22:59:53,871 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] [2023-02-15 22:59:53,879 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-02-15 22:59:54,077 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 22:59:54,077 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2023-02-15 22:59:54,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 22:59:54,078 INFO L85 PathProgramCache]: Analyzing trace with hash -61224288, now seen corresponding path program 1 times [2023-02-15 22:59:54,078 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 22:59:54,078 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [344065879] [2023-02-15 22:59:54,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 22:59:54,078 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 22:59:54,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:59:54,136 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-02-15 22:59:54,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:59:54,162 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-15 22:59:54,162 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 22:59:54,162 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [344065879] [2023-02-15 22:59:54,163 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [344065879] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 22:59:54,163 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [103436998] [2023-02-15 22:59:54,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 22:59:54,163 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 22:59:54,163 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 22:59:54,164 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) [2023-02-15 22:59:54,186 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-02-15 22:59:54,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:59:54,206 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 10 conjunts are in the unsatisfiable core [2023-02-15 22:59:54,208 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 22:59:54,265 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-15 22:59:54,265 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 22:59:54,409 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-15 22:59:54,410 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [103436998] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 22:59:54,410 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 22:59:54,410 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2023-02-15 22:59:54,410 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1640296327] [2023-02-15 22:59:54,410 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 22:59:54,410 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-02-15 22:59:54,410 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 22:59:54,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-02-15 22:59:54,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2023-02-15 22:59:54,411 INFO L87 Difference]: Start difference. First operand 444 states and 557 transitions. Second operand has 15 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 13 states have internal predecessors, (41), 6 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-15 22:59:54,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 22:59:54,718 INFO L93 Difference]: Finished difference Result 769 states and 1113 transitions. [2023-02-15 22:59:54,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-02-15 22:59:54,718 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 13 states have internal predecessors, (41), 6 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 25 [2023-02-15 22:59:54,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 22:59:54,723 INFO L225 Difference]: With dead ends: 769 [2023-02-15 22:59:54,723 INFO L226 Difference]: Without dead ends: 767 [2023-02-15 22:59:54,724 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 43 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=154, Invalid=496, Unknown=0, NotChecked=0, Total=650 [2023-02-15 22:59:54,726 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 87 mSDsluCounter, 134 mSDsCounter, 0 mSdLazyCounter, 228 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 153 SdHoareTripleChecker+Invalid, 293 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 228 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 22:59:54,726 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [94 Valid, 153 Invalid, 293 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 228 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 22:59:54,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 767 states. [2023-02-15 22:59:54,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 767 to 635. [2023-02-15 22:59:54,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 635 states, 474 states have (on average 1.2046413502109705) internal successors, (571), 499 states have internal predecessors, (571), 107 states have call successors, (107), 31 states have call predecessors, (107), 49 states have return successors, (187), 104 states have call predecessors, (187), 103 states have call successors, (187) [2023-02-15 22:59:54,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 635 states to 635 states and 865 transitions. [2023-02-15 22:59:54,781 INFO L78 Accepts]: Start accepts. Automaton has 635 states and 865 transitions. Word has length 25 [2023-02-15 22:59:54,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 22:59:54,783 INFO L495 AbstractCegarLoop]: Abstraction has 635 states and 865 transitions. [2023-02-15 22:59:54,783 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 13 states have internal predecessors, (41), 6 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-15 22:59:54,783 INFO L276 IsEmpty]: Start isEmpty. Operand 635 states and 865 transitions. [2023-02-15 22:59:54,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-02-15 22:59:54,787 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 22:59:54,787 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2023-02-15 22:59:54,793 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-02-15 22:59:54,992 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 22:59:54,993 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ackermannErr6ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2023-02-15 22:59:54,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 22:59:54,993 INFO L85 PathProgramCache]: Analyzing trace with hash -1846384600, now seen corresponding path program 1 times [2023-02-15 22:59:54,993 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 22:59:54,993 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1651587232] [2023-02-15 22:59:54,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 22:59:54,993 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 22:59:54,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:59:55,059 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 22:59:55,060 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 22:59:55,060 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1651587232] [2023-02-15 22:59:55,060 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1651587232] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 22:59:55,061 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1525785504] [2023-02-15 22:59:55,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 22:59:55,062 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 22:59:55,062 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 22:59:55,063 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) [2023-02-15 22:59:55,096 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-02-15 22:59:55,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:59:55,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 8 conjunts are in the unsatisfiable core [2023-02-15 22:59:55,113 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 22:59:55,149 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 22:59:55,150 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 22:59:55,245 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 22:59:55,245 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1525785504] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 22:59:55,245 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 22:59:55,245 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 15 [2023-02-15 22:59:55,245 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1690167434] [2023-02-15 22:59:55,245 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 22:59:55,247 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-02-15 22:59:55,247 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 22:59:55,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-02-15 22:59:55,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2023-02-15 22:59:55,248 INFO L87 Difference]: Start difference. First operand 635 states and 865 transitions. Second operand has 16 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 10 states have internal predecessors, (45), 6 states have call successors, (6), 6 states have call predecessors, (6), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 22:59:55,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 22:59:55,590 INFO L93 Difference]: Finished difference Result 989 states and 1395 transitions. [2023-02-15 22:59:55,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-02-15 22:59:55,592 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 10 states have internal predecessors, (45), 6 states have call successors, (6), 6 states have call predecessors, (6), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2023-02-15 22:59:55,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 22:59:55,597 INFO L225 Difference]: With dead ends: 989 [2023-02-15 22:59:55,598 INFO L226 Difference]: Without dead ends: 988 [2023-02-15 22:59:55,599 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=214, Invalid=488, Unknown=0, NotChecked=0, Total=702 [2023-02-15 22:59:55,599 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 231 mSDsluCounter, 229 mSDsCounter, 0 mSdLazyCounter, 289 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 234 SdHoareTripleChecker+Valid, 267 SdHoareTripleChecker+Invalid, 353 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 289 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-15 22:59:55,600 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [234 Valid, 267 Invalid, 353 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 289 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-15 22:59:55,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 988 states. [2023-02-15 22:59:55,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 988 to 917. [2023-02-15 22:59:55,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 917 states, 681 states have (on average 1.171806167400881) internal successors, (798), 721 states have internal predecessors, (798), 155 states have call successors, (155), 43 states have call predecessors, (155), 76 states have return successors, (278), 152 states have call predecessors, (278), 151 states have call successors, (278) [2023-02-15 22:59:55,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 917 states to 917 states and 1231 transitions. [2023-02-15 22:59:55,665 INFO L78 Accepts]: Start accepts. Automaton has 917 states and 1231 transitions. Word has length 27 [2023-02-15 22:59:55,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 22:59:55,666 INFO L495 AbstractCegarLoop]: Abstraction has 917 states and 1231 transitions. [2023-02-15 22:59:55,666 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 10 states have internal predecessors, (45), 6 states have call successors, (6), 6 states have call predecessors, (6), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 22:59:55,666 INFO L276 IsEmpty]: Start isEmpty. Operand 917 states and 1231 transitions. [2023-02-15 22:59:55,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-02-15 22:59:55,667 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 22:59:55,667 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] [2023-02-15 22:59:55,673 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-02-15 22:59:55,872 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-02-15 22:59:55,873 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ackermannErr6ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2023-02-15 22:59:55,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 22:59:55,874 INFO L85 PathProgramCache]: Analyzing trace with hash 1298021223, now seen corresponding path program 1 times [2023-02-15 22:59:55,874 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 22:59:55,874 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1722377249] [2023-02-15 22:59:55,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 22:59:55,874 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 22:59:55,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:59:55,924 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-02-15 22:59:55,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:59:55,945 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-02-15 22:59:55,946 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 22:59:55,946 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1722377249] [2023-02-15 22:59:55,946 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1722377249] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 22:59:55,946 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1729673167] [2023-02-15 22:59:55,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 22:59:55,947 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 22:59:55,947 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 22:59:55,948 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) [2023-02-15 22:59:55,976 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-02-15 22:59:55,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:59:55,990 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 10 conjunts are in the unsatisfiable core [2023-02-15 22:59:55,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 22:59:56,032 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-02-15 22:59:56,033 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 22:59:56,177 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-02-15 22:59:56,177 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1729673167] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 22:59:56,177 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 22:59:56,177 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2023-02-15 22:59:56,179 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2021178885] [2023-02-15 22:59:56,179 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 22:59:56,180 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-02-15 22:59:56,180 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 22:59:56,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-02-15 22:59:56,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2023-02-15 22:59:56,181 INFO L87 Difference]: Start difference. First operand 917 states and 1231 transitions. Second operand has 15 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 13 states have internal predecessors, (37), 6 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-15 22:59:56,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 22:59:56,494 INFO L93 Difference]: Finished difference Result 1430 states and 2152 transitions. [2023-02-15 22:59:56,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-02-15 22:59:56,495 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 13 states have internal predecessors, (37), 6 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 27 [2023-02-15 22:59:56,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 22:59:56,503 INFO L225 Difference]: With dead ends: 1430 [2023-02-15 22:59:56,504 INFO L226 Difference]: Without dead ends: 1425 [2023-02-15 22:59:56,505 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 47 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=136, Invalid=416, Unknown=0, NotChecked=0, Total=552 [2023-02-15 22:59:56,506 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 156 mSDsluCounter, 104 mSDsCounter, 0 mSdLazyCounter, 202 mSolverCounterSat, 92 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 156 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 294 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 202 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 22:59:56,506 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [156 Valid, 123 Invalid, 294 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [92 Valid, 202 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 22:59:56,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1425 states. [2023-02-15 22:59:56,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1425 to 1080. [2023-02-15 22:59:56,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1080 states, 804 states have (on average 1.1703980099502487) internal successors, (941), 853 states have internal predecessors, (941), 175 states have call successors, (175), 53 states have call predecessors, (175), 96 states have return successors, (415), 173 states have call predecessors, (415), 170 states have call successors, (415) [2023-02-15 22:59:56,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1080 states to 1080 states and 1531 transitions. [2023-02-15 22:59:56,608 INFO L78 Accepts]: Start accepts. Automaton has 1080 states and 1531 transitions. Word has length 27 [2023-02-15 22:59:56,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 22:59:56,608 INFO L495 AbstractCegarLoop]: Abstraction has 1080 states and 1531 transitions. [2023-02-15 22:59:56,608 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 13 states have internal predecessors, (37), 6 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-15 22:59:56,609 INFO L276 IsEmpty]: Start isEmpty. Operand 1080 states and 1531 transitions. [2023-02-15 22:59:56,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2023-02-15 22:59:56,609 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 22:59:56,610 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] [2023-02-15 22:59:56,614 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-02-15 22:59:56,814 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 22:59:56,815 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2023-02-15 22:59:56,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 22:59:56,815 INFO L85 PathProgramCache]: Analyzing trace with hash -722353775, now seen corresponding path program 1 times [2023-02-15 22:59:56,815 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 22:59:56,815 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [599464552] [2023-02-15 22:59:56,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 22:59:56,816 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 22:59:56,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:59:56,879 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-02-15 22:59:56,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:59:56,909 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-02-15 22:59:56,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:59:56,937 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-02-15 22:59:56,937 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 22:59:56,938 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [599464552] [2023-02-15 22:59:56,938 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [599464552] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 22:59:56,938 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1806948426] [2023-02-15 22:59:56,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 22:59:56,938 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 22:59:56,938 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 22:59:56,940 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) [2023-02-15 22:59:56,950 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-02-15 22:59:56,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:59:56,985 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 9 conjunts are in the unsatisfiable core [2023-02-15 22:59:56,986 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 22:59:57,022 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-02-15 22:59:57,023 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 22:59:57,186 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-02-15 22:59:57,187 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1806948426] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 22:59:57,187 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 22:59:57,187 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2023-02-15 22:59:57,187 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1710179996] [2023-02-15 22:59:57,187 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 22:59:57,187 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-02-15 22:59:57,187 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 22:59:57,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-02-15 22:59:57,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2023-02-15 22:59:57,188 INFO L87 Difference]: Start difference. First operand 1080 states and 1531 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) [2023-02-15 22:59:57,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 22:59:57,694 INFO L93 Difference]: Finished difference Result 1847 states and 3105 transitions. [2023-02-15 22:59:57,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-02-15 22:59:57,695 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 [2023-02-15 22:59:57,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 22:59:57,709 INFO L225 Difference]: With dead ends: 1847 [2023-02-15 22:59:57,709 INFO L226 Difference]: Without dead ends: 1833 [2023-02-15 22:59:57,711 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=188, Invalid=682, Unknown=0, NotChecked=0, Total=870 [2023-02-15 22:59:57,711 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 131 mSDsluCounter, 149 mSDsCounter, 0 mSdLazyCounter, 306 mSolverCounterSat, 115 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 175 SdHoareTripleChecker+Invalid, 421 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 115 IncrementalHoareTripleChecker+Valid, 306 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-15 22:59:57,712 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [131 Valid, 175 Invalid, 421 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [115 Valid, 306 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-15 22:59:57,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1833 states. [2023-02-15 22:59:57,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1833 to 1577. [2023-02-15 22:59:57,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1577 states, 1149 states have (on average 1.162750217580505) internal successors, (1336), 1210 states have internal predecessors, (1336), 271 states have call successors, (271), 73 states have call predecessors, (271), 152 states have return successors, (774), 293 states have call predecessors, (774), 263 states have call successors, (774) [2023-02-15 22:59:57,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1577 states to 1577 states and 2381 transitions. [2023-02-15 22:59:57,867 INFO L78 Accepts]: Start accepts. Automaton has 1577 states and 2381 transitions. Word has length 34 [2023-02-15 22:59:57,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 22:59:57,868 INFO L495 AbstractCegarLoop]: Abstraction has 1577 states and 2381 transitions. [2023-02-15 22:59:57,868 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) [2023-02-15 22:59:57,868 INFO L276 IsEmpty]: Start isEmpty. Operand 1577 states and 2381 transitions. [2023-02-15 22:59:57,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2023-02-15 22:59:57,869 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 22:59:57,869 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] [2023-02-15 22:59:57,877 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-02-15 22:59:58,078 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 22:59:58,078 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ackermannErr6ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2023-02-15 22:59:58,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 22:59:58,079 INFO L85 PathProgramCache]: Analyzing trace with hash 1607744024, now seen corresponding path program 1 times [2023-02-15 22:59:58,079 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 22:59:58,079 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [266045148] [2023-02-15 22:59:58,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 22:59:58,079 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 22:59:58,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:59:58,150 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-02-15 22:59:58,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:59:58,172 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-02-15 22:59:58,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:59:58,202 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 14 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-02-15 22:59:58,203 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 22:59:58,203 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [266045148] [2023-02-15 22:59:58,203 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [266045148] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 22:59:58,203 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1632925248] [2023-02-15 22:59:58,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 22:59:58,203 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 22:59:58,204 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 22:59:58,205 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) [2023-02-15 22:59:58,207 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-02-15 22:59:58,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:59:58,245 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 9 conjunts are in the unsatisfiable core [2023-02-15 22:59:58,246 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 22:59:58,285 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 12 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-02-15 22:59:58,285 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 22:59:58,438 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-02-15 22:59:58,439 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1632925248] provided 1 perfect and 1 imperfect interpolant sequences [2023-02-15 22:59:58,439 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-02-15 22:59:58,439 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8, 8] total 17 [2023-02-15 22:59:58,439 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1825965310] [2023-02-15 22:59:58,439 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 22:59:58,439 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-02-15 22:59:58,439 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 22:59:58,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-02-15 22:59:58,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2023-02-15 22:59:58,440 INFO L87 Difference]: Start difference. First operand 1577 states and 2381 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) [2023-02-15 22:59:58,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 22:59:58,745 INFO L93 Difference]: Finished difference Result 1736 states and 2788 transitions. [2023-02-15 22:59:58,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-02-15 22:59:58,745 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 [2023-02-15 22:59:58,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 22:59:58,758 INFO L225 Difference]: With dead ends: 1736 [2023-02-15 22:59:58,758 INFO L226 Difference]: Without dead ends: 1735 [2023-02-15 22:59:58,760 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=100, Invalid=550, Unknown=0, NotChecked=0, Total=650 [2023-02-15 22:59:58,760 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 65 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 172 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 142 SdHoareTripleChecker+Invalid, 215 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 172 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 22:59:58,761 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [71 Valid, 142 Invalid, 215 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 172 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 22:59:58,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1735 states. [2023-02-15 22:59:58,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1735 to 1614. [2023-02-15 22:59:58,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1614 states, 1173 states have (on average 1.1568627450980393) internal successors, (1357), 1231 states have internal predecessors, (1357), 287 states have call successors, (287), 73 states have call predecessors, (287), 149 states have return successors, (703), 309 states have call predecessors, (703), 279 states have call successors, (703) [2023-02-15 22:59:58,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1614 states to 1614 states and 2347 transitions. [2023-02-15 22:59:58,893 INFO L78 Accepts]: Start accepts. Automaton has 1614 states and 2347 transitions. Word has length 36 [2023-02-15 22:59:58,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 22:59:58,893 INFO L495 AbstractCegarLoop]: Abstraction has 1614 states and 2347 transitions. [2023-02-15 22:59:58,893 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) [2023-02-15 22:59:58,893 INFO L276 IsEmpty]: Start isEmpty. Operand 1614 states and 2347 transitions. [2023-02-15 22:59:58,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-02-15 22:59:58,896 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 22:59:58,896 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 22:59:58,903 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-02-15 22:59:59,103 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-02-15 22:59:59,104 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ackermannErr6ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2023-02-15 22:59:59,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 22:59:59,104 INFO L85 PathProgramCache]: Analyzing trace with hash -1310665197, now seen corresponding path program 2 times [2023-02-15 22:59:59,104 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 22:59:59,104 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1598983295] [2023-02-15 22:59:59,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 22:59:59,105 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 22:59:59,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:59:59,207 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2023-02-15 22:59:59,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:59:59,229 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 2 proven. 40 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-02-15 22:59:59,229 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 22:59:59,229 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1598983295] [2023-02-15 22:59:59,229 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1598983295] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 22:59:59,230 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1684955495] [2023-02-15 22:59:59,230 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-15 22:59:59,230 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 22:59:59,230 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 22:59:59,233 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) [2023-02-15 22:59:59,260 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-02-15 22:59:59,293 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-15 22:59:59,293 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 22:59:59,294 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 14 conjunts are in the unsatisfiable core [2023-02-15 22:59:59,296 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 22:59:59,357 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 2 proven. 40 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-02-15 22:59:59,357 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 22:59:59,534 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 4 proven. 38 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-02-15 22:59:59,534 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1684955495] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 22:59:59,534 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 22:59:59,535 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 22 [2023-02-15 22:59:59,535 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1714449434] [2023-02-15 22:59:59,535 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 22:59:59,535 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-02-15 22:59:59,535 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 22:59:59,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-02-15 22:59:59,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2023-02-15 22:59:59,536 INFO L87 Difference]: Start difference. First operand 1614 states and 2347 transitions. Second operand has 23 states, 20 states have (on average 3.05) internal successors, (61), 17 states have internal predecessors, (61), 8 states have call successors, (10), 7 states have call predecessors, (10), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-15 23:00:00,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 23:00:00,410 INFO L93 Difference]: Finished difference Result 3141 states and 5440 transitions. [2023-02-15 23:00:00,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2023-02-15 23:00:00,410 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 20 states have (on average 3.05) internal successors, (61), 17 states have internal predecessors, (61), 8 states have call successors, (10), 7 states have call predecessors, (10), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 43 [2023-02-15 23:00:00,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 23:00:00,434 INFO L225 Difference]: With dead ends: 3141 [2023-02-15 23:00:00,435 INFO L226 Difference]: Without dead ends: 3140 [2023-02-15 23:00:00,438 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 76 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 447 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=573, Invalid=1779, Unknown=0, NotChecked=0, Total=2352 [2023-02-15 23:00:00,438 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 508 mSDsluCounter, 169 mSDsCounter, 0 mSdLazyCounter, 465 mSolverCounterSat, 422 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 508 SdHoareTripleChecker+Valid, 188 SdHoareTripleChecker+Invalid, 887 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 422 IncrementalHoareTripleChecker+Valid, 465 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-15 23:00:00,439 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [508 Valid, 188 Invalid, 887 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [422 Valid, 465 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-15 23:00:00,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3140 states. [2023-02-15 23:00:00,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3140 to 2201. [2023-02-15 23:00:00,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2201 states, 1612 states have (on average 1.1557071960297767) internal successors, (1863), 1689 states have internal predecessors, (1863), 372 states have call successors, (372), 107 states have call predecessors, (372), 212 states have return successors, (1147), 404 states have call predecessors, (1147), 364 states have call successors, (1147) [2023-02-15 23:00:00,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2201 states to 2201 states and 3382 transitions. [2023-02-15 23:00:00,698 INFO L78 Accepts]: Start accepts. Automaton has 2201 states and 3382 transitions. Word has length 43 [2023-02-15 23:00:00,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 23:00:00,698 INFO L495 AbstractCegarLoop]: Abstraction has 2201 states and 3382 transitions. [2023-02-15 23:00:00,699 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 20 states have (on average 3.05) internal successors, (61), 17 states have internal predecessors, (61), 8 states have call successors, (10), 7 states have call predecessors, (10), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-15 23:00:00,699 INFO L276 IsEmpty]: Start isEmpty. Operand 2201 states and 3382 transitions. [2023-02-15 23:00:00,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2023-02-15 23:00:00,700 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 23:00:00,701 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] [2023-02-15 23:00:00,711 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-02-15 23:00:00,906 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-02-15 23:00:00,906 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ackermannErr6ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2023-02-15 23:00:00,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 23:00:00,907 INFO L85 PathProgramCache]: Analyzing trace with hash -1058043410, now seen corresponding path program 2 times [2023-02-15 23:00:00,907 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 23:00:00,907 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1611811667] [2023-02-15 23:00:00,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 23:00:00,908 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 23:00:00,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 23:00:00,980 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-02-15 23:00:00,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 23:00:01,014 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-02-15 23:00:01,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 23:00:01,045 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 26 proven. 8 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-02-15 23:00:01,046 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 23:00:01,046 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1611811667] [2023-02-15 23:00:01,046 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1611811667] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 23:00:01,046 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [893492271] [2023-02-15 23:00:01,046 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-15 23:00:01,047 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 23:00:01,047 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 23:00:01,048 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) [2023-02-15 23:00:01,073 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-02-15 23:00:01,099 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-15 23:00:01,099 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 23:00:01,100 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 11 conjunts are in the unsatisfiable core [2023-02-15 23:00:01,103 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 23:00:01,154 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 24 proven. 10 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-02-15 23:00:01,154 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 23:00:01,373 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 28 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-02-15 23:00:01,374 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [893492271] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 23:00:01,374 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 23:00:01,374 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 21 [2023-02-15 23:00:01,374 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2112341359] [2023-02-15 23:00:01,374 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 23:00:01,374 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-02-15 23:00:01,374 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 23:00:01,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-02-15 23:00:01,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2023-02-15 23:00:01,375 INFO L87 Difference]: Start difference. First operand 2201 states and 3382 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) [2023-02-15 23:00:02,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 23:00:02,605 INFO L93 Difference]: Finished difference Result 4449 states and 8202 transitions. [2023-02-15 23:00:02,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-02-15 23:00:02,605 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 [2023-02-15 23:00:02,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 23:00:02,626 INFO L225 Difference]: With dead ends: 4449 [2023-02-15 23:00:02,626 INFO L226 Difference]: Without dead ends: 3134 [2023-02-15 23:00:02,640 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 482 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=582, Invalid=1968, Unknown=0, NotChecked=0, Total=2550 [2023-02-15 23:00:02,641 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 198 mSDsluCounter, 254 mSDsCounter, 0 mSdLazyCounter, 664 mSolverCounterSat, 317 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 198 SdHoareTripleChecker+Valid, 290 SdHoareTripleChecker+Invalid, 981 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 317 IncrementalHoareTripleChecker+Valid, 664 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-02-15 23:00:02,641 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [198 Valid, 290 Invalid, 981 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [317 Valid, 664 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-02-15 23:00:02,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3134 states. [2023-02-15 23:00:02,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3134 to 2494. [2023-02-15 23:00:02,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2494 states, 1823 states have (on average 1.1492046077893583) internal successors, (2095), 1909 states have internal predecessors, (2095), 428 states have call successors, (428), 122 states have call predecessors, (428), 238 states have return successors, (1243), 462 states have call predecessors, (1243), 420 states have call successors, (1243) [2023-02-15 23:00:02,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2494 states to 2494 states and 3766 transitions. [2023-02-15 23:00:02,870 INFO L78 Accepts]: Start accepts. Automaton has 2494 states and 3766 transitions. Word has length 44 [2023-02-15 23:00:02,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 23:00:02,871 INFO L495 AbstractCegarLoop]: Abstraction has 2494 states and 3766 transitions. [2023-02-15 23:00:02,871 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) [2023-02-15 23:00:02,871 INFO L276 IsEmpty]: Start isEmpty. Operand 2494 states and 3766 transitions. [2023-02-15 23:00:02,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2023-02-15 23:00:02,874 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 23:00:02,874 INFO L195 NwaCegarLoop]: trace histogram [5, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 23:00:02,880 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-02-15 23:00:03,078 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-02-15 23:00:03,079 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2023-02-15 23:00:03,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 23:00:03,079 INFO L85 PathProgramCache]: Analyzing trace with hash 1051982124, now seen corresponding path program 1 times [2023-02-15 23:00:03,079 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 23:00:03,079 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [939212778] [2023-02-15 23:00:03,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 23:00:03,079 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 23:00:03,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 23:00:03,104 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-02-15 23:00:03,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 23:00:03,117 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-02-15 23:00:03,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 23:00:03,129 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2023-02-15 23:00:03,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 23:00:03,131 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 24 proven. 5 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-02-15 23:00:03,131 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 23:00:03,131 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [939212778] [2023-02-15 23:00:03,131 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [939212778] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 23:00:03,132 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1280276021] [2023-02-15 23:00:03,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 23:00:03,132 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 23:00:03,132 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 23:00:03,133 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) [2023-02-15 23:00:03,141 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-02-15 23:00:03,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 23:00:03,180 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 6 conjunts are in the unsatisfiable core [2023-02-15 23:00:03,181 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 23:00:03,222 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 22 proven. 5 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-02-15 23:00:03,222 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 23:00:03,330 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 22 proven. 5 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-02-15 23:00:03,330 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1280276021] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 23:00:03,330 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 23:00:03,330 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7, 7] total 12 [2023-02-15 23:00:03,331 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [803162790] [2023-02-15 23:00:03,331 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 23:00:03,331 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-02-15 23:00:03,331 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 23:00:03,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-02-15 23:00:03,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2023-02-15 23:00:03,332 INFO L87 Difference]: Start difference. First operand 2494 states and 3766 transitions. Second operand has 12 states, 12 states have (on average 4.0) internal successors, (48), 12 states have internal predecessors, (48), 4 states have call successors, (6), 2 states have call predecessors, (6), 5 states have return successors, (5), 2 states have call predecessors, (5), 4 states have call successors, (5) [2023-02-15 23:00:03,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 23:00:03,528 INFO L93 Difference]: Finished difference Result 3517 states and 5520 transitions. [2023-02-15 23:00:03,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-02-15 23:00:03,529 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.0) internal successors, (48), 12 states have internal predecessors, (48), 4 states have call successors, (6), 2 states have call predecessors, (6), 5 states have return successors, (5), 2 states have call predecessors, (5), 4 states have call successors, (5) Word has length 44 [2023-02-15 23:00:03,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 23:00:03,536 INFO L225 Difference]: With dead ends: 3517 [2023-02-15 23:00:03,537 INFO L226 Difference]: Without dead ends: 1211 [2023-02-15 23:00:03,552 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 87 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2023-02-15 23:00:03,552 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 53 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 148 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 23:00:03,553 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 103 Invalid, 148 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 116 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 23:00:03,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1211 states. [2023-02-15 23:00:03,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1211 to 1182. [2023-02-15 23:00:03,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1182 states, 881 states have (on average 1.112372304199773) internal successors, (980), 905 states have internal predecessors, (980), 212 states have call successors, (212), 67 states have call predecessors, (212), 85 states have return successors, (333), 209 states have call predecessors, (333), 208 states have call successors, (333) [2023-02-15 23:00:03,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1182 states to 1182 states and 1525 transitions. [2023-02-15 23:00:03,683 INFO L78 Accepts]: Start accepts. Automaton has 1182 states and 1525 transitions. Word has length 44 [2023-02-15 23:00:03,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 23:00:03,684 INFO L495 AbstractCegarLoop]: Abstraction has 1182 states and 1525 transitions. [2023-02-15 23:00:03,684 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.0) internal successors, (48), 12 states have internal predecessors, (48), 4 states have call successors, (6), 2 states have call predecessors, (6), 5 states have return successors, (5), 2 states have call predecessors, (5), 4 states have call successors, (5) [2023-02-15 23:00:03,684 INFO L276 IsEmpty]: Start isEmpty. Operand 1182 states and 1525 transitions. [2023-02-15 23:00:03,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2023-02-15 23:00:03,686 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 23:00:03,686 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] [2023-02-15 23:00:03,694 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-02-15 23:00:03,892 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-02-15 23:00:03,892 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2023-02-15 23:00:03,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 23:00:03,893 INFO L85 PathProgramCache]: Analyzing trace with hash 843839239, now seen corresponding path program 1 times [2023-02-15 23:00:03,893 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 23:00:03,893 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1196769248] [2023-02-15 23:00:03,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 23:00:03,893 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 23:00:03,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 23:00:03,989 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-02-15 23:00:03,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 23:00:04,039 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-02-15 23:00:04,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 23:00:04,061 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-02-15 23:00:04,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 23:00:04,095 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2023-02-15 23:00:04,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 23:00:04,155 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 21 proven. 16 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-02-15 23:00:04,155 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 23:00:04,155 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1196769248] [2023-02-15 23:00:04,155 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1196769248] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 23:00:04,155 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1576931300] [2023-02-15 23:00:04,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 23:00:04,156 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 23:00:04,156 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 23:00:04,157 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) [2023-02-15 23:00:04,160 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-02-15 23:00:04,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 23:00:04,204 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 15 conjunts are in the unsatisfiable core [2023-02-15 23:00:04,205 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 23:00:04,249 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 14 proven. 18 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2023-02-15 23:00:04,249 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 23:00:04,695 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 18 proven. 19 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-02-15 23:00:04,696 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1576931300] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 23:00:04,696 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 23:00:04,696 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 13] total 26 [2023-02-15 23:00:04,696 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1871258998] [2023-02-15 23:00:04,697 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 23:00:04,697 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-02-15 23:00:04,697 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 23:00:04,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-02-15 23:00:04,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=614, Unknown=0, NotChecked=0, Total=702 [2023-02-15 23:00:04,698 INFO L87 Difference]: Start difference. First operand 1182 states and 1525 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) [2023-02-15 23:00:06,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 23:00:06,230 INFO L93 Difference]: Finished difference Result 3123 states and 5780 transitions. [2023-02-15 23:00:06,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2023-02-15 23:00:06,231 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 [2023-02-15 23:00:06,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 23:00:06,262 INFO L225 Difference]: With dead ends: 3123 [2023-02-15 23:00:06,262 INFO L226 Difference]: Without dead ends: 3117 [2023-02-15 23:00:06,267 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1681 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1154, Invalid=5008, Unknown=0, NotChecked=0, Total=6162 [2023-02-15 23:00:06,268 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 253 mSDsluCounter, 198 mSDsCounter, 0 mSdLazyCounter, 698 mSolverCounterSat, 508 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 264 SdHoareTripleChecker+Valid, 220 SdHoareTripleChecker+Invalid, 1206 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 508 IncrementalHoareTripleChecker+Valid, 698 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-02-15 23:00:06,268 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [264 Valid, 220 Invalid, 1206 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [508 Valid, 698 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-02-15 23:00:06,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3117 states. [2023-02-15 23:00:06,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3117 to 2241. [2023-02-15 23:00:06,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2241 states, 1548 states have (on average 1.0872093023255813) internal successors, (1683), 1572 states have internal predecessors, (1683), 429 states have call successors, (429), 81 states have call predecessors, (429), 260 states have return successors, (2514), 587 states have call predecessors, (2514), 423 states have call successors, (2514) [2023-02-15 23:00:06,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2241 states to 2241 states and 4626 transitions. [2023-02-15 23:00:06,549 INFO L78 Accepts]: Start accepts. Automaton has 2241 states and 4626 transitions. Word has length 53 [2023-02-15 23:00:06,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 23:00:06,550 INFO L495 AbstractCegarLoop]: Abstraction has 2241 states and 4626 transitions. [2023-02-15 23:00:06,550 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) [2023-02-15 23:00:06,550 INFO L276 IsEmpty]: Start isEmpty. Operand 2241 states and 4626 transitions. [2023-02-15 23:00:06,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2023-02-15 23:00:06,551 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 23:00:06,551 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1] [2023-02-15 23:00:06,563 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-02-15 23:00:06,757 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-02-15 23:00:06,757 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ackermannErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2023-02-15 23:00:06,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 23:00:06,757 INFO L85 PathProgramCache]: Analyzing trace with hash 2013961680, now seen corresponding path program 1 times [2023-02-15 23:00:06,758 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 23:00:06,758 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [331926479] [2023-02-15 23:00:06,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 23:00:06,758 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 23:00:06,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 23:00:06,949 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 111 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-02-15 23:00:06,949 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 23:00:06,949 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [331926479] [2023-02-15 23:00:06,949 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [331926479] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 23:00:06,949 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2017866006] [2023-02-15 23:00:06,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 23:00:06,949 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 23:00:06,950 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 23:00:06,951 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) [2023-02-15 23:00:06,953 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-02-15 23:00:07,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 23:00:07,001 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 18 conjunts are in the unsatisfiable core [2023-02-15 23:00:07,003 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 23:00:07,064 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 111 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-02-15 23:00:07,064 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 23:00:07,223 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 111 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-02-15 23:00:07,223 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2017866006] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 23:00:07,223 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 23:00:07,224 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 23 [2023-02-15 23:00:07,224 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1186542858] [2023-02-15 23:00:07,224 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 23:00:07,224 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-02-15 23:00:07,224 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 23:00:07,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-02-15 23:00:07,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=416, Unknown=0, NotChecked=0, Total=552 [2023-02-15 23:00:07,225 INFO L87 Difference]: Start difference. First operand 2241 states and 4626 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) [2023-02-15 23:00:08,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 23:00:08,229 INFO L93 Difference]: Finished difference Result 6148 states and 12929 transitions. [2023-02-15 23:00:08,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2023-02-15 23:00:08,230 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 [2023-02-15 23:00:08,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 23:00:08,287 INFO L225 Difference]: With dead ends: 6148 [2023-02-15 23:00:08,287 INFO L226 Difference]: Without dead ends: 6147 [2023-02-15 23:00:08,292 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 107 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 339 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=554, Invalid=1252, Unknown=0, NotChecked=0, Total=1806 [2023-02-15 23:00:08,293 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 716 mSDsluCounter, 308 mSDsCounter, 0 mSdLazyCounter, 449 mSolverCounterSat, 272 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 721 SdHoareTripleChecker+Valid, 337 SdHoareTripleChecker+Invalid, 721 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 272 IncrementalHoareTripleChecker+Valid, 449 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-02-15 23:00:08,293 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [721 Valid, 337 Invalid, 721 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [272 Valid, 449 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-02-15 23:00:08,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6147 states. [2023-02-15 23:00:08,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6147 to 6063. [2023-02-15 23:00:08,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6063 states, 4212 states have (on average 1.089031339031339) internal successors, (4587), 4284 states have internal predecessors, (4587), 1161 states have call successors, (1161), 231 states have call predecessors, (1161), 686 states have return successors, (6822), 1547 states have call predecessors, (6822), 1155 states have call successors, (6822) [2023-02-15 23:00:09,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6063 states to 6063 states and 12570 transitions. [2023-02-15 23:00:09,008 INFO L78 Accepts]: Start accepts. Automaton has 6063 states and 12570 transitions. Word has length 57 [2023-02-15 23:00:09,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 23:00:09,009 INFO L495 AbstractCegarLoop]: Abstraction has 6063 states and 12570 transitions. [2023-02-15 23:00:09,010 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) [2023-02-15 23:00:09,010 INFO L276 IsEmpty]: Start isEmpty. Operand 6063 states and 12570 transitions. [2023-02-15 23:00:09,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2023-02-15 23:00:09,011 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 23:00:09,012 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] [2023-02-15 23:00:09,019 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-02-15 23:00:09,216 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-02-15 23:00:09,216 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ackermannErr6ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2023-02-15 23:00:09,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 23:00:09,217 INFO L85 PathProgramCache]: Analyzing trace with hash -814290418, now seen corresponding path program 1 times [2023-02-15 23:00:09,217 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 23:00:09,217 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [219056101] [2023-02-15 23:00:09,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 23:00:09,217 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 23:00:09,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 23:00:09,319 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-02-15 23:00:09,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 23:00:09,378 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-02-15 23:00:09,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 23:00:09,403 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-02-15 23:00:09,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 23:00:09,476 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2023-02-15 23:00:09,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 23:00:09,511 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 36 proven. 6 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-02-15 23:00:09,512 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 23:00:09,512 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [219056101] [2023-02-15 23:00:09,512 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [219056101] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 23:00:09,512 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [866874334] [2023-02-15 23:00:09,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 23:00:09,512 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 23:00:09,512 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 23:00:09,514 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) [2023-02-15 23:00:09,545 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-02-15 23:00:09,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 23:00:09,572 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 15 conjunts are in the unsatisfiable core [2023-02-15 23:00:09,573 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 23:00:09,611 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 27 proven. 10 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2023-02-15 23:00:09,612 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 23:00:10,035 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 40 proven. 2 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-02-15 23:00:10,036 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [866874334] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 23:00:10,036 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 23:00:10,036 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 13] total 26 [2023-02-15 23:00:10,036 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [960760652] [2023-02-15 23:00:10,036 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 23:00:10,037 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-02-15 23:00:10,037 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 23:00:10,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-02-15 23:00:10,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=608, Unknown=0, NotChecked=0, Total=702 [2023-02-15 23:00:10,038 INFO L87 Difference]: Start difference. First operand 6063 states and 12570 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) [2023-02-15 23:00:12,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 23:00:12,631 INFO L93 Difference]: Finished difference Result 22151 states and 80869 transitions. [2023-02-15 23:00:12,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2023-02-15 23:00:12,632 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 [2023-02-15 23:00:12,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 23:00:12,907 INFO L225 Difference]: With dead ends: 22151 [2023-02-15 23:00:12,907 INFO L226 Difference]: Without dead ends: 16963 [2023-02-15 23:00:13,025 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 815 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=905, Invalid=3517, Unknown=0, NotChecked=0, Total=4422 [2023-02-15 23:00:13,026 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 220 mSDsluCounter, 308 mSDsCounter, 0 mSdLazyCounter, 795 mSolverCounterSat, 299 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 220 SdHoareTripleChecker+Valid, 344 SdHoareTripleChecker+Invalid, 1094 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 299 IncrementalHoareTripleChecker+Valid, 795 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-02-15 23:00:13,026 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [220 Valid, 344 Invalid, 1094 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [299 Valid, 795 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-02-15 23:00:13,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16963 states. [2023-02-15 23:00:15,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16963 to 13356. [2023-02-15 23:00:15,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13356 states, 8756 states have (on average 1.0572179077204202) internal successors, (9257), 8789 states have internal predecessors, (9257), 2669 states have call successors, (2669), 308 states have call predecessors, (2669), 1927 states have return successors, (36980), 4258 states have call predecessors, (36980), 2658 states have call successors, (36980) [2023-02-15 23:00:15,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13356 states to 13356 states and 48906 transitions. [2023-02-15 23:00:15,801 INFO L78 Accepts]: Start accepts. Automaton has 13356 states and 48906 transitions. Word has length 55 [2023-02-15 23:00:15,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 23:00:15,802 INFO L495 AbstractCegarLoop]: Abstraction has 13356 states and 48906 transitions. [2023-02-15 23:00:15,802 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) [2023-02-15 23:00:15,802 INFO L276 IsEmpty]: Start isEmpty. Operand 13356 states and 48906 transitions. [2023-02-15 23:00:15,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2023-02-15 23:00:15,804 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 23:00:15,804 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1] [2023-02-15 23:00:15,825 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2023-02-15 23:00:16,004 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 23:00:16,005 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ackermannErr6ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2023-02-15 23:00:16,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 23:00:16,005 INFO L85 PathProgramCache]: Analyzing trace with hash 1321083776, now seen corresponding path program 2 times [2023-02-15 23:00:16,005 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 23:00:16,005 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1541540140] [2023-02-15 23:00:16,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 23:00:16,005 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 23:00:16,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 23:00:16,292 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 23:00:16,293 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 23:00:16,293 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1541540140] [2023-02-15 23:00:16,293 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1541540140] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 23:00:16,293 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [298494189] [2023-02-15 23:00:16,293 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-15 23:00:16,293 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 23:00:16,294 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 23:00:16,295 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) [2023-02-15 23:00:16,298 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-02-15 23:00:16,351 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-15 23:00:16,351 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 23:00:16,352 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 16 conjunts are in the unsatisfiable core [2023-02-15 23:00:16,353 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 23:00:16,421 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 23:00:16,421 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 23:00:16,688 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 23:00:16,688 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [298494189] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 23:00:16,688 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 23:00:16,688 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 31 [2023-02-15 23:00:16,688 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [798263975] [2023-02-15 23:00:16,688 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 23:00:16,689 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-02-15 23:00:16,689 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 23:00:16,689 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-02-15 23:00:16,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=244, Invalid=748, Unknown=0, NotChecked=0, Total=992 [2023-02-15 23:00:16,690 INFO L87 Difference]: Start difference. First operand 13356 states and 48906 transitions. Second operand has 32 states, 29 states have (on average 3.4827586206896552) internal successors, (101), 18 states have internal predecessors, (101), 14 states have call successors, (14), 14 states have call predecessors, (14), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 23:00:18,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 23:00:18,956 INFO L93 Difference]: Finished difference Result 20225 states and 73221 transitions. [2023-02-15 23:00:18,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2023-02-15 23:00:18,957 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 29 states have (on average 3.4827586206896552) internal successors, (101), 18 states have internal predecessors, (101), 14 states have call successors, (14), 14 states have call predecessors, (14), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2023-02-15 23:00:18,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 23:00:19,320 INFO L225 Difference]: With dead ends: 20225 [2023-02-15 23:00:19,320 INFO L226 Difference]: Without dead ends: 20224 [2023-02-15 23:00:19,336 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 101 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 704 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1054, Invalid=2368, Unknown=0, NotChecked=0, Total=3422 [2023-02-15 23:00:19,337 INFO L413 NwaCegarLoop]: 51 mSDtfsCounter, 504 mSDsluCounter, 508 mSDsCounter, 0 mSdLazyCounter, 585 mSolverCounterSat, 259 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 508 SdHoareTripleChecker+Valid, 559 SdHoareTripleChecker+Invalid, 844 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 259 IncrementalHoareTripleChecker+Valid, 585 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-02-15 23:00:19,337 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [508 Valid, 559 Invalid, 844 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [259 Valid, 585 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-02-15 23:00:19,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20224 states. [2023-02-15 23:00:21,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20224 to 19840. [2023-02-15 23:00:21,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19840 states, 13022 states have (on average 1.0495315619720473) internal successors, (13667), 13129 states have internal predecessors, (13667), 3917 states have call successors, (3917), 452 states have call predecessors, (3917), 2897 states have return successors, (53631), 6258 states have call predecessors, (53631), 3906 states have call successors, (53631) [2023-02-15 23:00:22,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19840 states to 19840 states and 71215 transitions. [2023-02-15 23:00:22,534 INFO L78 Accepts]: Start accepts. Automaton has 19840 states and 71215 transitions. Word has length 59 [2023-02-15 23:00:22,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 23:00:22,535 INFO L495 AbstractCegarLoop]: Abstraction has 19840 states and 71215 transitions. [2023-02-15 23:00:22,535 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 29 states have (on average 3.4827586206896552) internal successors, (101), 18 states have internal predecessors, (101), 14 states have call successors, (14), 14 states have call predecessors, (14), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 23:00:22,535 INFO L276 IsEmpty]: Start isEmpty. Operand 19840 states and 71215 transitions. [2023-02-15 23:00:22,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2023-02-15 23:00:22,539 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 23:00:22,539 INFO L195 NwaCegarLoop]: trace histogram [9, 7, 5, 5, 5, 5, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 23:00:22,653 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-02-15 23:00:22,743 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 23:00:22,744 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ackermannErr6ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2023-02-15 23:00:22,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 23:00:22,744 INFO L85 PathProgramCache]: Analyzing trace with hash -1727955375, now seen corresponding path program 2 times [2023-02-15 23:00:22,744 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 23:00:22,745 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1135124040] [2023-02-15 23:00:22,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 23:00:22,745 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 23:00:22,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 23:00:22,863 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2023-02-15 23:00:22,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 23:00:22,904 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-02-15 23:00:22,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 23:00:22,940 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-02-15 23:00:22,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 23:00:22,965 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-02-15 23:00:22,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 23:00:22,996 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2023-02-15 23:00:22,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 23:00:23,023 INFO L134 CoverageAnalysis]: Checked inductivity of 163 backedges. 86 proven. 16 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2023-02-15 23:00:23,024 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 23:00:23,024 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1135124040] [2023-02-15 23:00:23,024 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1135124040] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 23:00:23,024 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2124855612] [2023-02-15 23:00:23,024 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-15 23:00:23,024 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 23:00:23,025 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 23:00:23,026 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) [2023-02-15 23:00:23,029 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-02-15 23:00:23,085 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-15 23:00:23,085 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 23:00:23,086 INFO L263 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 19 conjunts are in the unsatisfiable core [2023-02-15 23:00:23,087 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 23:00:23,150 INFO L134 CoverageAnalysis]: Checked inductivity of 163 backedges. 75 proven. 22 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2023-02-15 23:00:23,150 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 23:00:24,165 INFO L134 CoverageAnalysis]: Checked inductivity of 163 backedges. 94 proven. 8 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2023-02-15 23:00:24,165 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2124855612] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 23:00:24,165 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 23:00:24,165 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 16] total 32 [2023-02-15 23:00:24,166 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1952508140] [2023-02-15 23:00:24,166 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 23:00:24,166 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-02-15 23:00:24,166 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 23:00:24,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-02-15 23:00:24,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=930, Unknown=0, NotChecked=0, Total=1056 [2023-02-15 23:00:24,167 INFO L87 Difference]: Start difference. First operand 19840 states and 71215 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) [2023-02-15 23:00:26,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 23:00:26,513 INFO L93 Difference]: Finished difference Result 30265 states and 111648 transitions. [2023-02-15 23:00:26,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-02-15 23:00:26,513 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 32 states have (on average 2.4375) internal successors, (78), 23 states have internal predecessors, (78), 7 states have call successors, (9), 5 states have call predecessors, (9), 8 states have return successors, (11), 10 states have call predecessors, (11), 3 states have call successors, (11) Word has length 80 [2023-02-15 23:00:26,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 23:00:26,584 INFO L225 Difference]: With dead ends: 30265 [2023-02-15 23:00:26,585 INFO L226 Difference]: Without dead ends: 12260 [2023-02-15 23:00:26,812 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 156 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 503 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=667, Invalid=2639, Unknown=0, NotChecked=0, Total=3306 [2023-02-15 23:00:26,813 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 159 mSDsluCounter, 260 mSDsCounter, 0 mSdLazyCounter, 573 mSolverCounterSat, 137 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 159 SdHoareTripleChecker+Valid, 298 SdHoareTripleChecker+Invalid, 710 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 137 IncrementalHoareTripleChecker+Valid, 573 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-15 23:00:26,813 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [159 Valid, 298 Invalid, 710 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [137 Valid, 573 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-15 23:00:26,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12260 states. [2023-02-15 23:00:27,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12260 to 11692. [2023-02-15 23:00:27,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11692 states, 8105 states have (on average 1.073781616286243) internal successors, (8703), 8384 states have internal predecessors, (8703), 2284 states have call successors, (2284), 476 states have call predecessors, (2284), 1299 states have return successors, (7789), 2831 states have call predecessors, (7789), 2276 states have call successors, (7789) [2023-02-15 23:00:28,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11692 states to 11692 states and 18776 transitions. [2023-02-15 23:00:28,050 INFO L78 Accepts]: Start accepts. Automaton has 11692 states and 18776 transitions. Word has length 80 [2023-02-15 23:00:28,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 23:00:28,050 INFO L495 AbstractCegarLoop]: Abstraction has 11692 states and 18776 transitions. [2023-02-15 23:00:28,050 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) [2023-02-15 23:00:28,051 INFO L276 IsEmpty]: Start isEmpty. Operand 11692 states and 18776 transitions. [2023-02-15 23:00:28,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2023-02-15 23:00:28,053 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 23:00:28,053 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] [2023-02-15 23:00:28,061 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-02-15 23:00:28,258 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 23:00:28,258 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ackermannErr6ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2023-02-15 23:00:28,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 23:00:28,259 INFO L85 PathProgramCache]: Analyzing trace with hash 1935422832, now seen corresponding path program 3 times [2023-02-15 23:00:28,259 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 23:00:28,259 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [986131517] [2023-02-15 23:00:28,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 23:00:28,259 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 23:00:28,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 23:00:28,399 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-02-15 23:00:28,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 23:00:28,425 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-02-15 23:00:28,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 23:00:28,458 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 62 proven. 77 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-02-15 23:00:28,458 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 23:00:28,458 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [986131517] [2023-02-15 23:00:28,458 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [986131517] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 23:00:28,458 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [51467813] [2023-02-15 23:00:28,459 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-15 23:00:28,459 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 23:00:28,459 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 23:00:28,460 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) [2023-02-15 23:00:28,462 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-02-15 23:00:28,652 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2023-02-15 23:00:28,652 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 23:00:28,653 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 17 conjunts are in the unsatisfiable core [2023-02-15 23:00:28,655 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 23:00:28,733 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 60 proven. 79 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-02-15 23:00:28,734 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 23:00:29,078 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 64 proven. 75 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-02-15 23:00:29,079 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [51467813] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 23:00:29,079 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 23:00:29,079 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 33 [2023-02-15 23:00:29,079 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [851973926] [2023-02-15 23:00:29,079 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 23:00:29,079 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-02-15 23:00:29,079 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 23:00:29,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-02-15 23:00:29,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=949, Unknown=0, NotChecked=0, Total=1122 [2023-02-15 23:00:29,080 INFO L87 Difference]: Start difference. First operand 11692 states and 18776 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) [2023-02-15 23:00:30,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 23:00:30,513 INFO L93 Difference]: Finished difference Result 12447 states and 19918 transitions. [2023-02-15 23:00:30,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-02-15 23:00:30,514 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 [2023-02-15 23:00:30,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 23:00:30,566 INFO L225 Difference]: With dead ends: 12447 [2023-02-15 23:00:30,566 INFO L226 Difference]: Without dead ends: 12446 [2023-02-15 23:00:30,572 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 127 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 464 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=573, Invalid=1977, Unknown=0, NotChecked=0, Total=2550 [2023-02-15 23:00:30,577 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 190 mSDsluCounter, 299 mSDsCounter, 0 mSdLazyCounter, 612 mSolverCounterSat, 152 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 190 SdHoareTripleChecker+Valid, 330 SdHoareTripleChecker+Invalid, 764 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 152 IncrementalHoareTripleChecker+Valid, 612 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-15 23:00:30,578 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [190 Valid, 330 Invalid, 764 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [152 Valid, 612 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-15 23:00:30,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12446 states. [2023-02-15 23:00:31,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12446 to 11800. [2023-02-15 23:00:31,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11800 states, 8177 states have (on average 1.0699523052464228) internal successors, (8749), 8456 states have internal predecessors, (8749), 2284 states have call successors, (2284), 476 states have call predecessors, (2284), 1335 states have return successors, (7883), 2867 states have call predecessors, (7883), 2276 states have call successors, (7883) [2023-02-15 23:00:31,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11800 states to 11800 states and 18916 transitions. [2023-02-15 23:00:31,596 INFO L78 Accepts]: Start accepts. Automaton has 11800 states and 18916 transitions. Word has length 68 [2023-02-15 23:00:31,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 23:00:31,597 INFO L495 AbstractCegarLoop]: Abstraction has 11800 states and 18916 transitions. [2023-02-15 23:00:31,597 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) [2023-02-15 23:00:31,597 INFO L276 IsEmpty]: Start isEmpty. Operand 11800 states and 18916 transitions. [2023-02-15 23:00:31,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2023-02-15 23:00:31,603 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 23:00:31,603 INFO L195 NwaCegarLoop]: trace histogram [13, 9, 7, 7, 7, 7, 7, 7, 7, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2023-02-15 23:00:31,610 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-02-15 23:00:31,808 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 23:00:31,808 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2023-02-15 23:00:31,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 23:00:31,809 INFO L85 PathProgramCache]: Analyzing trace with hash -1269437730, now seen corresponding path program 2 times [2023-02-15 23:00:31,809 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 23:00:31,809 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [761670769] [2023-02-15 23:00:31,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 23:00:31,809 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 23:00:31,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 23:00:31,989 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2023-02-15 23:00:31,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 23:00:32,034 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-02-15 23:00:32,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 23:00:32,077 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-02-15 23:00:32,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 23:00:32,112 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-02-15 23:00:32,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 23:00:32,136 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-02-15 23:00:32,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 23:00:32,139 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2023-02-15 23:00:32,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 23:00:32,142 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2023-02-15 23:00:32,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 23:00:32,145 INFO L134 CoverageAnalysis]: Checked inductivity of 362 backedges. 155 proven. 28 refuted. 0 times theorem prover too weak. 179 trivial. 0 not checked. [2023-02-15 23:00:32,145 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 23:00:32,145 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [761670769] [2023-02-15 23:00:32,145 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [761670769] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 23:00:32,145 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [187218301] [2023-02-15 23:00:32,145 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-15 23:00:32,145 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 23:00:32,146 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 23:00:32,147 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) [2023-02-15 23:00:32,150 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-02-15 23:00:32,226 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-15 23:00:32,226 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 23:00:32,228 INFO L263 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 7 conjunts are in the unsatisfiable core [2023-02-15 23:00:32,229 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 23:00:32,292 INFO L134 CoverageAnalysis]: Checked inductivity of 362 backedges. 157 proven. 15 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2023-02-15 23:00:32,293 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 23:00:32,619 INFO L134 CoverageAnalysis]: Checked inductivity of 362 backedges. 157 proven. 26 refuted. 0 times theorem prover too weak. 179 trivial. 0 not checked. [2023-02-15 23:00:32,619 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [187218301] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 23:00:32,619 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 23:00:32,620 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 8] total 14 [2023-02-15 23:00:32,620 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [591230233] [2023-02-15 23:00:32,620 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 23:00:32,622 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-02-15 23:00:32,622 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 23:00:32,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-02-15 23:00:32,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2023-02-15 23:00:32,624 INFO L87 Difference]: Start difference. First operand 11800 states and 18916 transitions. Second operand has 14 states, 14 states have (on average 6.0) internal successors, (84), 14 states have internal predecessors, (84), 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) [2023-02-15 23:00:33,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 23:00:33,764 INFO L93 Difference]: Finished difference Result 22584 states and 40813 transitions. [2023-02-15 23:00:33,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-02-15 23:00:33,765 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 6.0) internal successors, (84), 14 states have internal predecessors, (84), 12 states have call successors, (14), 2 states have call predecessors, (14), 7 states have return successors, (14), 6 states have call predecessors, (14), 11 states have call successors, (14) Word has length 113 [2023-02-15 23:00:33,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 23:00:33,837 INFO L225 Difference]: With dead ends: 22584 [2023-02-15 23:00:33,837 INFO L226 Difference]: Without dead ends: 12984 [2023-02-15 23:00:33,914 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 252 GetRequests, 232 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=112, Invalid=230, Unknown=0, NotChecked=0, Total=342 [2023-02-15 23:00:33,915 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 51 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 148 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 172 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 148 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 23:00:33,915 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 119 Invalid, 172 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 148 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 23:00:33,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12984 states. [2023-02-15 23:00:34,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12984 to 11794. [2023-02-15 23:00:34,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11794 states, 8174 states have (on average 1.0699779789576707) internal successors, (8746), 8453 states have internal predecessors, (8746), 2281 states have call successors, (2281), 476 states have call predecessors, (2281), 1335 states have return successors, (7803), 2864 states have call predecessors, (7803), 2246 states have call successors, (7803) [2023-02-15 23:00:35,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11794 states to 11794 states and 18830 transitions. [2023-02-15 23:00:35,049 INFO L78 Accepts]: Start accepts. Automaton has 11794 states and 18830 transitions. Word has length 113 [2023-02-15 23:00:35,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 23:00:35,050 INFO L495 AbstractCegarLoop]: Abstraction has 11794 states and 18830 transitions. [2023-02-15 23:00:35,050 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 6.0) internal successors, (84), 14 states have internal predecessors, (84), 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) [2023-02-15 23:00:35,051 INFO L276 IsEmpty]: Start isEmpty. Operand 11794 states and 18830 transitions. [2023-02-15 23:00:35,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2023-02-15 23:00:35,057 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 23:00:35,058 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] [2023-02-15 23:00:35,065 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-02-15 23:00:35,262 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 23:00:35,262 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2023-02-15 23:00:35,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 23:00:35,263 INFO L85 PathProgramCache]: Analyzing trace with hash -1307053986, now seen corresponding path program 3 times [2023-02-15 23:00:35,263 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 23:00:35,263 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1777629071] [2023-02-15 23:00:35,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 23:00:35,263 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 23:00:35,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 23:00:35,331 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-02-15 23:00:35,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 23:00:35,396 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-02-15 23:00:35,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 23:00:35,443 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-02-15 23:00:35,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 23:00:35,480 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-02-15 23:00:35,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 23:00:35,519 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-02-15 23:00:35,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 23:00:35,538 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-02-15 23:00:35,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 23:00:35,560 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2023-02-15 23:00:35,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 23:00:35,564 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2023-02-15 23:00:35,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 23:00:35,575 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2023-02-15 23:00:35,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 23:00:35,579 INFO L134 CoverageAnalysis]: Checked inductivity of 266 backedges. 117 proven. 51 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2023-02-15 23:00:35,579 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 23:00:35,579 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1777629071] [2023-02-15 23:00:35,579 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1777629071] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 23:00:35,580 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [698710661] [2023-02-15 23:00:35,580 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-15 23:00:35,580 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 23:00:35,580 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 23:00:35,584 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) [2023-02-15 23:00:35,587 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-02-15 23:00:35,662 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2023-02-15 23:00:35,662 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 23:00:35,664 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 12 conjunts are in the unsatisfiable core [2023-02-15 23:00:35,666 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 23:00:35,745 INFO L134 CoverageAnalysis]: Checked inductivity of 266 backedges. 153 proven. 26 refuted. 0 times theorem prover too weak. 87 trivial. 0 not checked. [2023-02-15 23:00:35,745 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 23:00:36,496 INFO L134 CoverageAnalysis]: Checked inductivity of 266 backedges. 123 proven. 57 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2023-02-15 23:00:36,496 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [698710661] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 23:00:36,496 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 23:00:36,497 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 11] total 17 [2023-02-15 23:00:36,497 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2059698643] [2023-02-15 23:00:36,497 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 23:00:36,497 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-02-15 23:00:36,498 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 23:00:36,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-02-15 23:00:36,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=202, Unknown=0, NotChecked=0, Total=272 [2023-02-15 23:00:36,499 INFO L87 Difference]: Start difference. First operand 11794 states and 18830 transitions. Second operand has 17 states, 17 states have (on average 4.9411764705882355) internal successors, (84), 17 states have internal predecessors, (84), 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) [2023-02-15 23:00:38,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 23:00:38,035 INFO L93 Difference]: Finished difference Result 24299 states and 49196 transitions. [2023-02-15 23:00:38,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-02-15 23:00:38,036 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.9411764705882355) internal successors, (84), 17 states have internal predecessors, (84), 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 [2023-02-15 23:00:38,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 23:00:38,108 INFO L225 Difference]: With dead ends: 24299 [2023-02-15 23:00:38,108 INFO L226 Difference]: Without dead ends: 14733 [2023-02-15 23:00:38,180 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 207 SyntacticMatches, 7 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=124, Invalid=296, Unknown=0, NotChecked=0, Total=420 [2023-02-15 23:00:38,180 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 56 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 157 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 196 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 157 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 23:00:38,181 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 127 Invalid, 196 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 157 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 23:00:38,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14733 states. [2023-02-15 23:00:39,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14733 to 14372. [2023-02-15 23:00:39,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14372 states, 9692 states have (on average 1.0522080066033843) internal successors, (10198), 9951 states have internal predecessors, (10198), 2881 states have call successors, (2881), 496 states have call predecessors, (2881), 1795 states have return successors, (9707), 3924 states have call predecessors, (9707), 2826 states have call successors, (9707) [2023-02-15 23:00:39,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14372 states to 14372 states and 22786 transitions. [2023-02-15 23:00:39,702 INFO L78 Accepts]: Start accepts. Automaton has 14372 states and 22786 transitions. Word has length 100 [2023-02-15 23:00:39,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 23:00:39,702 INFO L495 AbstractCegarLoop]: Abstraction has 14372 states and 22786 transitions. [2023-02-15 23:00:39,703 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 4.9411764705882355) internal successors, (84), 17 states have internal predecessors, (84), 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) [2023-02-15 23:00:39,703 INFO L276 IsEmpty]: Start isEmpty. Operand 14372 states and 22786 transitions. [2023-02-15 23:00:39,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2023-02-15 23:00:39,710 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 23:00:39,710 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] [2023-02-15 23:00:39,717 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2023-02-15 23:00:39,915 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 23:00:39,915 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ackermannErr6ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2023-02-15 23:00:39,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 23:00:39,916 INFO L85 PathProgramCache]: Analyzing trace with hash 1104252262, now seen corresponding path program 3 times [2023-02-15 23:00:39,916 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 23:00:39,916 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1186959025] [2023-02-15 23:00:39,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 23:00:39,916 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 23:00:39,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 23:00:40,100 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-02-15 23:00:40,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 23:00:40,145 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-02-15 23:00:40,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 23:00:40,173 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-02-15 23:00:40,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 23:00:40,211 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2023-02-15 23:00:40,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 23:00:40,243 INFO L134 CoverageAnalysis]: Checked inductivity of 227 backedges. 120 proven. 86 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-02-15 23:00:40,244 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 23:00:40,244 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1186959025] [2023-02-15 23:00:40,244 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1186959025] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 23:00:40,244 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1879867718] [2023-02-15 23:00:40,244 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-15 23:00:40,245 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 23:00:40,245 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 23:00:40,246 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) [2023-02-15 23:00:40,267 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-02-15 23:00:40,330 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2023-02-15 23:00:40,330 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 23:00:40,331 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 31 conjunts are in the unsatisfiable core [2023-02-15 23:00:40,333 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 23:00:40,511 INFO L134 CoverageAnalysis]: Checked inductivity of 227 backedges. 113 proven. 41 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2023-02-15 23:00:40,511 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 23:00:40,683 INFO L134 CoverageAnalysis]: Checked inductivity of 227 backedges. 142 proven. 13 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2023-02-15 23:00:40,684 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1879867718] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 23:00:40,684 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 23:00:40,684 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 7, 8] total 29 [2023-02-15 23:00:40,684 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [274727722] [2023-02-15 23:00:40,684 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 23:00:40,685 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-02-15 23:00:40,685 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 23:00:40,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-02-15 23:00:40,686 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=723, Unknown=0, NotChecked=0, Total=812 [2023-02-15 23:00:40,686 INFO L87 Difference]: Start difference. First operand 14372 states and 22786 transitions. Second operand has 29 states, 29 states have (on average 3.6551724137931036) internal successors, (106), 22 states have internal predecessors, (106), 11 states have call successors, (15), 7 states have call predecessors, (15), 7 states have return successors, (10), 9 states have call predecessors, (10), 4 states have call successors, (10)