./Ultimate.py --spec ../sv-benchmarks/c/properties/no-overflow.prp --file ../sv-benchmarks/c/recursive/Ackermann03.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version 574ddb4e Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/recursive/Ackermann03.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Overflow-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! overflow) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash c244f72db2906c596b7f122d769fc1464836d7d05d9227ee4269773d59ed10bd --- Real Ultimate output --- This is Ultimate 0.2.2-?-574ddb4 [2023-02-17 09:06:16,485 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-02-17 09:06:16,487 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-02-17 09:06:16,520 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-02-17 09:06:16,521 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-02-17 09:06:16,523 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-02-17 09:06:16,525 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-02-17 09:06:16,527 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-02-17 09:06:16,528 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-02-17 09:06:16,532 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-02-17 09:06:16,533 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-02-17 09:06:16,535 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-02-17 09:06:16,535 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-02-17 09:06:16,538 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-02-17 09:06:16,539 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-02-17 09:06:16,540 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-02-17 09:06:16,541 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-02-17 09:06:16,542 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-02-17 09:06:16,543 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-02-17 09:06:16,547 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-02-17 09:06:16,548 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-02-17 09:06:16,548 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-02-17 09:06:16,550 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-02-17 09:06:16,550 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-02-17 09:06:16,556 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-02-17 09:06:16,556 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-02-17 09:06:16,557 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-02-17 09:06:16,558 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-02-17 09:06:16,558 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-02-17 09:06:16,559 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-02-17 09:06:16,559 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-02-17 09:06:16,559 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-02-17 09:06:16,560 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-02-17 09:06:16,562 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-02-17 09:06:16,563 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-02-17 09:06:16,563 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-02-17 09:06:16,563 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-02-17 09:06:16,564 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-02-17 09:06:16,564 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-02-17 09:06:16,564 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-02-17 09:06:16,565 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-02-17 09:06:16,566 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Overflow-32bit-Automizer_Default.epf [2023-02-17 09:06:16,588 INFO L113 SettingsManager]: Loading preferences was successful [2023-02-17 09:06:16,588 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-02-17 09:06:16,588 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-02-17 09:06:16,588 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-02-17 09:06:16,589 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-02-17 09:06:16,589 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-02-17 09:06:16,590 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-02-17 09:06:16,590 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-02-17 09:06:16,590 INFO L138 SettingsManager]: * Use SBE=true [2023-02-17 09:06:16,590 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-02-17 09:06:16,591 INFO L138 SettingsManager]: * sizeof long=4 [2023-02-17 09:06:16,591 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-02-17 09:06:16,591 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-02-17 09:06:16,591 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-02-17 09:06:16,592 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-02-17 09:06:16,592 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-02-17 09:06:16,592 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-02-17 09:06:16,592 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-02-17 09:06:16,592 INFO L138 SettingsManager]: * Check absence of signed integer overflows=true [2023-02-17 09:06:16,592 INFO L138 SettingsManager]: * sizeof long double=12 [2023-02-17 09:06:16,592 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-02-17 09:06:16,593 INFO L138 SettingsManager]: * Use constant arrays=true [2023-02-17 09:06:16,593 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-02-17 09:06:16,593 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-02-17 09:06:16,593 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-02-17 09:06:16,593 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-02-17 09:06:16,594 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-17 09:06:16,594 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-02-17 09:06:16,594 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-02-17 09:06:16,594 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-02-17 09:06:16,594 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-02-17 09:06:16,594 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-02-17 09:06:16,595 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-02-17 09:06:16,595 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-02-17 09:06:16,595 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-02-17 09:06:16,595 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-02-17 09:06:16,595 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-02-17 09:06:16,595 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c244f72db2906c596b7f122d769fc1464836d7d05d9227ee4269773d59ed10bd [2023-02-17 09:06:16,809 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-02-17 09:06:16,831 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-02-17 09:06:16,832 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-02-17 09:06:16,833 INFO L271 PluginConnector]: Initializing CDTParser... [2023-02-17 09:06:16,834 INFO L275 PluginConnector]: CDTParser initialized [2023-02-17 09:06:16,835 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/recursive/Ackermann03.c [2023-02-17 09:06:17,927 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-02-17 09:06:18,278 INFO L351 CDTParser]: Found 1 translation units. [2023-02-17 09:06:18,278 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursive/Ackermann03.c [2023-02-17 09:06:18,282 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ccc879b40/6edaf71eb83f4957b3c90b49efa45657/FLAG2b5efcd22 [2023-02-17 09:06:18,296 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ccc879b40/6edaf71eb83f4957b3c90b49efa45657 [2023-02-17 09:06:18,297 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-02-17 09:06:18,298 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-02-17 09:06:18,301 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-02-17 09:06:18,301 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-02-17 09:06:18,303 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-02-17 09:06:18,304 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.02 09:06:18" (1/1) ... [2023-02-17 09:06:18,305 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5626aca5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 09:06:18, skipping insertion in model container [2023-02-17 09:06:18,305 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.02 09:06:18" (1/1) ... [2023-02-17 09:06:18,314 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-02-17 09:06:18,325 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-02-17 09:06:18,417 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursive/Ackermann03.c[1168,1181] [2023-02-17 09:06:18,418 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-17 09:06:18,431 INFO L203 MainTranslator]: Completed pre-run [2023-02-17 09:06:18,441 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursive/Ackermann03.c[1168,1181] [2023-02-17 09:06:18,441 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-17 09:06:18,449 INFO L208 MainTranslator]: Completed translation [2023-02-17 09:06:18,450 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 09:06:18 WrapperNode [2023-02-17 09:06:18,450 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-02-17 09:06:18,451 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-02-17 09:06:18,451 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-02-17 09:06:18,451 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-02-17 09:06:18,456 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 09:06:18" (1/1) ... [2023-02-17 09:06:18,460 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 09:06:18" (1/1) ... [2023-02-17 09:06:18,471 INFO L138 Inliner]: procedures = 13, calls = 11, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 32 [2023-02-17 09:06:18,472 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-02-17 09:06:18,472 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-02-17 09:06:18,472 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-02-17 09:06:18,472 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-02-17 09:06:18,477 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 09:06:18" (1/1) ... [2023-02-17 09:06:18,478 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 09:06:18" (1/1) ... [2023-02-17 09:06:18,479 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 09:06:18" (1/1) ... [2023-02-17 09:06:18,479 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 09:06:18" (1/1) ... [2023-02-17 09:06:18,480 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 09:06:18" (1/1) ... [2023-02-17 09:06:18,481 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 09:06:18" (1/1) ... [2023-02-17 09:06:18,482 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 09:06:18" (1/1) ... [2023-02-17 09:06:18,482 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 09:06:18" (1/1) ... [2023-02-17 09:06:18,483 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-02-17 09:06:18,484 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-02-17 09:06:18,484 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-02-17 09:06:18,484 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-02-17 09:06:18,485 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 09:06:18" (1/1) ... [2023-02-17 09:06:18,489 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-17 09:06:18,504 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 09:06:18,550 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-02-17 09:06:18,556 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-02-17 09:06:18,590 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-02-17 09:06:18,590 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-02-17 09:06:18,593 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-02-17 09:06:18,594 INFO L130 BoogieDeclarations]: Found specification of procedure ackermann [2023-02-17 09:06:18,594 INFO L138 BoogieDeclarations]: Found implementation of procedure ackermann [2023-02-17 09:06:18,594 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-02-17 09:06:18,653 INFO L235 CfgBuilder]: Building ICFG [2023-02-17 09:06:18,654 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2023-02-17 09:06:18,765 INFO L276 CfgBuilder]: Performing block encoding [2023-02-17 09:06:18,779 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-02-17 09:06:18,779 INFO L300 CfgBuilder]: Removed 0 assume(true) statements. [2023-02-17 09:06:18,781 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.02 09:06:18 BoogieIcfgContainer [2023-02-17 09:06:18,781 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-02-17 09:06:18,783 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-02-17 09:06:18,788 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-02-17 09:06:18,790 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-02-17 09:06:18,790 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.02 09:06:18" (1/3) ... [2023-02-17 09:06:18,791 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2422639b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.02 09:06:18, skipping insertion in model container [2023-02-17 09:06:18,791 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 09:06:18" (2/3) ... [2023-02-17 09:06:18,791 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2422639b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.02 09:06:18, skipping insertion in model container [2023-02-17 09:06:18,791 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.02 09:06:18" (3/3) ... [2023-02-17 09:06:18,792 INFO L112 eAbstractionObserver]: Analyzing ICFG Ackermann03.c [2023-02-17 09:06:18,820 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-02-17 09:06:18,820 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 8 error locations. [2023-02-17 09:06:18,857 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-02-17 09:06:18,862 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;@51433fc7, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-02-17 09:06:18,873 INFO L358 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2023-02-17 09:06:18,877 INFO L276 IsEmpty]: Start isEmpty. Operand has 38 states, 24 states have (on average 1.5416666666666667) internal successors, (37), 32 states have internal predecessors, (37), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-02-17 09:06:18,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-02-17 09:06:18,883 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 09:06:18,894 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 09:06:18,895 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2023-02-17 09:06:18,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 09:06:18,899 INFO L85 PathProgramCache]: Analyzing trace with hash 180762217, now seen corresponding path program 1 times [2023-02-17 09:06:18,905 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 09:06:18,906 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [84544507] [2023-02-17 09:06:18,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 09:06:18,906 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 09:06:18,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 09:06:19,074 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 09:06:19,075 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 09:06:19,075 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [84544507] [2023-02-17 09:06:19,076 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [84544507] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 09:06:19,076 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 09:06:19,077 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-17 09:06:19,078 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1748810014] [2023-02-17 09:06:19,078 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 09:06:19,082 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-17 09:06:19,082 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 09:06:19,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-17 09:06:19,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-02-17 09:06:19,120 INFO L87 Difference]: Start difference. First operand has 38 states, 24 states have (on average 1.5416666666666667) internal successors, (37), 32 states have internal predecessors, (37), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 5 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 09:06:19,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 09:06:19,344 INFO L93 Difference]: Finished difference Result 73 states and 85 transitions. [2023-02-17 09:06:19,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-17 09:06:19,346 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2023-02-17 09:06:19,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 09:06:19,353 INFO L225 Difference]: With dead ends: 73 [2023-02-17 09:06:19,353 INFO L226 Difference]: Without dead ends: 59 [2023-02-17 09:06:19,355 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-02-17 09:06:19,358 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, 0.2s IncrementalHoareTripleChecker+Time [2023-02-17 09:06:19,359 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [57 Valid, 119 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-17 09:06:19,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2023-02-17 09:06:19,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 51. [2023-02-17 09:06:19,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 34 states have (on average 1.5294117647058822) internal successors, (52), 42 states have internal predecessors, (52), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-02-17 09:06:19,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 65 transitions. [2023-02-17 09:06:19,396 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 65 transitions. Word has length 8 [2023-02-17 09:06:19,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 09:06:19,396 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 65 transitions. [2023-02-17 09:06:19,396 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 09:06:19,397 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 65 transitions. [2023-02-17 09:06:19,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2023-02-17 09:06:19,397 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 09:06:19,397 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 09:06:19,398 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-02-17 09:06:19,398 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2023-02-17 09:06:19,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 09:06:19,399 INFO L85 PathProgramCache]: Analyzing trace with hash 1308666490, now seen corresponding path program 1 times [2023-02-17 09:06:19,399 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 09:06:19,399 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1184538263] [2023-02-17 09:06:19,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 09:06:19,400 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 09:06:19,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 09:06:19,453 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 09:06:19,453 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 09:06:19,453 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1184538263] [2023-02-17 09:06:19,453 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1184538263] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 09:06:19,454 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 09:06:19,454 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-17 09:06:19,454 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1349353047] [2023-02-17 09:06:19,454 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 09:06:19,455 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-17 09:06:19,456 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 09:06:19,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-17 09:06:19,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-02-17 09:06:19,457 INFO L87 Difference]: Start difference. First operand 51 states and 65 transitions. Second operand has 5 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 09:06:19,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 09:06:19,542 INFO L93 Difference]: Finished difference Result 101 states and 137 transitions. [2023-02-17 09:06:19,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-17 09:06:19,545 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2023-02-17 09:06:19,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 09:06:19,548 INFO L225 Difference]: With dead ends: 101 [2023-02-17 09:06:19,548 INFO L226 Difference]: Without dead ends: 95 [2023-02-17 09:06:19,549 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-02-17 09:06:19,551 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 [2023-02-17 09:06:19,551 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 91 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-17 09:06:19,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2023-02-17 09:06:19,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 85. [2023-02-17 09:06:19,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 61 states have (on average 1.5081967213114753) internal successors, (92), 70 states have internal predecessors, (92), 13 states have call successors, (13), 4 states have call predecessors, (13), 3 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2023-02-17 09:06:19,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 115 transitions. [2023-02-17 09:06:19,570 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 115 transitions. Word has length 9 [2023-02-17 09:06:19,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 09:06:19,587 INFO L495 AbstractCegarLoop]: Abstraction has 85 states and 115 transitions. [2023-02-17 09:06:19,587 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 09:06:19,587 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 115 transitions. [2023-02-17 09:06:19,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2023-02-17 09:06:19,588 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 09:06:19,588 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 09:06:19,588 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-02-17 09:06:19,589 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2023-02-17 09:06:19,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 09:06:19,589 INFO L85 PathProgramCache]: Analyzing trace with hash 1308661493, now seen corresponding path program 1 times [2023-02-17 09:06:19,590 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 09:06:19,590 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [772991536] [2023-02-17 09:06:19,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 09:06:19,590 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 09:06:19,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 09:06:19,654 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 09:06:19,654 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 09:06:19,654 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [772991536] [2023-02-17 09:06:19,655 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [772991536] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 09:06:19,655 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 09:06:19,655 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-17 09:06:19,655 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [958212665] [2023-02-17 09:06:19,655 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 09:06:19,656 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-17 09:06:19,656 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 09:06:19,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-17 09:06:19,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-02-17 09:06:19,657 INFO L87 Difference]: Start difference. First operand 85 states and 115 transitions. Second operand has 5 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 09:06:19,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 09:06:19,729 INFO L93 Difference]: Finished difference Result 114 states and 152 transitions. [2023-02-17 09:06:19,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-17 09:06:19,730 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2023-02-17 09:06:19,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 09:06:19,732 INFO L225 Difference]: With dead ends: 114 [2023-02-17 09:06:19,732 INFO L226 Difference]: Without dead ends: 110 [2023-02-17 09:06:19,733 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-02-17 09:06:19,734 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 49 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-17 09:06:19,734 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 93 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-17 09:06:19,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2023-02-17 09:06:19,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 102. [2023-02-17 09:06:19,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 74 states have (on average 1.445945945945946) internal successors, (107), 83 states have internal predecessors, (107), 16 states have call successors, (16), 5 states have call predecessors, (16), 4 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2023-02-17 09:06:19,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 136 transitions. [2023-02-17 09:06:19,749 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 136 transitions. Word has length 9 [2023-02-17 09:06:19,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 09:06:19,749 INFO L495 AbstractCegarLoop]: Abstraction has 102 states and 136 transitions. [2023-02-17 09:06:19,749 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 09:06:19,749 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 136 transitions. [2023-02-17 09:06:19,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-02-17 09:06:19,750 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 09:06:19,750 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 09:06:19,750 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-02-17 09:06:19,751 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ackermannErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2023-02-17 09:06:19,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 09:06:19,751 INFO L85 PathProgramCache]: Analyzing trace with hash 1913955596, now seen corresponding path program 1 times [2023-02-17 09:06:19,752 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 09:06:19,752 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2063743382] [2023-02-17 09:06:19,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 09:06:19,752 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 09:06:19,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 09:06:19,806 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 09:06:19,806 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 09:06:19,806 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2063743382] [2023-02-17 09:06:19,806 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2063743382] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 09:06:19,807 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 09:06:19,807 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-17 09:06:19,807 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1098054534] [2023-02-17 09:06:19,807 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 09:06:19,807 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-17 09:06:19,807 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 09:06:19,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-17 09:06:19,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-02-17 09:06:19,808 INFO L87 Difference]: Start difference. First operand 102 states and 136 transitions. Second operand has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 09:06:19,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 09:06:19,846 INFO L93 Difference]: Finished difference Result 102 states and 136 transitions. [2023-02-17 09:06:19,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-02-17 09:06:19,847 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2023-02-17 09:06:19,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 09:06:19,848 INFO L225 Difference]: With dead ends: 102 [2023-02-17 09:06:19,848 INFO L226 Difference]: Without dead ends: 100 [2023-02-17 09:06:19,849 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-02-17 09:06:19,849 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 42 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-17 09:06:19,850 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 45 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-17 09:06:19,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2023-02-17 09:06:19,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 100. [2023-02-17 09:06:19,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 74 states have (on average 1.3108108108108107) internal successors, (97), 81 states have internal predecessors, (97), 16 states have call successors, (16), 5 states have call predecessors, (16), 4 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2023-02-17 09:06:19,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 126 transitions. [2023-02-17 09:06:19,858 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 126 transitions. Word has length 10 [2023-02-17 09:06:19,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 09:06:19,859 INFO L495 AbstractCegarLoop]: Abstraction has 100 states and 126 transitions. [2023-02-17 09:06:19,859 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 09:06:19,859 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 126 transitions. [2023-02-17 09:06:19,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-02-17 09:06:19,859 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 09:06:19,860 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 09:06:19,860 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-02-17 09:06:19,860 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2023-02-17 09:06:19,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 09:06:19,861 INFO L85 PathProgramCache]: Analyzing trace with hash 1669645175, now seen corresponding path program 1 times [2023-02-17 09:06:19,861 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 09:06:19,861 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [766310625] [2023-02-17 09:06:19,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 09:06:19,861 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 09:06:19,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 09:06:19,909 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 09:06:19,909 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 09:06:19,909 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [766310625] [2023-02-17 09:06:19,909 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [766310625] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 09:06:19,910 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 09:06:19,910 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-17 09:06:19,910 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [394635925] [2023-02-17 09:06:19,910 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 09:06:19,910 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-17 09:06:19,911 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 09:06:19,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-17 09:06:19,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-17 09:06:19,911 INFO L87 Difference]: Start difference. First operand 100 states and 126 transitions. Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 states have internal predecessors, (13), 1 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 09:06:19,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 09:06:19,954 INFO L93 Difference]: Finished difference Result 168 states and 221 transitions. [2023-02-17 09:06:19,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-17 09:06:19,954 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 states have internal predecessors, (13), 1 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2023-02-17 09:06:19,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 09:06:19,955 INFO L225 Difference]: With dead ends: 168 [2023-02-17 09:06:19,955 INFO L226 Difference]: Without dead ends: 97 [2023-02-17 09:06:19,957 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-02-17 09:06:19,958 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 26 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-17 09:06:19,958 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 88 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-17 09:06:19,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2023-02-17 09:06:19,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 96. [2023-02-17 09:06:19,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 71 states have (on average 1.295774647887324) internal successors, (92), 78 states have internal predecessors, (92), 15 states have call successors, (15), 5 states have call predecessors, (15), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2023-02-17 09:06:19,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 119 transitions. [2023-02-17 09:06:19,966 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 119 transitions. Word has length 15 [2023-02-17 09:06:19,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 09:06:19,967 INFO L495 AbstractCegarLoop]: Abstraction has 96 states and 119 transitions. [2023-02-17 09:06:19,967 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 states have internal predecessors, (13), 1 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 09:06:19,967 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 119 transitions. [2023-02-17 09:06:19,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-02-17 09:06:19,967 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 09:06:19,968 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 09:06:19,968 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-02-17 09:06:19,968 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ackermannErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2023-02-17 09:06:19,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 09:06:19,969 INFO L85 PathProgramCache]: Analyzing trace with hash 1669645399, now seen corresponding path program 1 times [2023-02-17 09:06:19,969 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 09:06:19,969 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [348833334] [2023-02-17 09:06:19,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 09:06:19,969 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 09:06:19,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 09:06:20,012 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 09:06:20,012 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 09:06:20,012 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [348833334] [2023-02-17 09:06:20,012 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [348833334] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 09:06:20,013 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [676943700] [2023-02-17 09:06:20,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 09:06:20,013 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 09:06:20,014 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 09:06:20,034 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-17 09:06:20,036 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-02-17 09:06:20,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 09:06:20,075 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 6 conjunts are in the unsatisfiable core [2023-02-17 09:06:20,078 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 09:06:20,106 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 09:06:20,107 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 09:06:20,138 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 09:06:20,139 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [676943700] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 09:06:20,139 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 09:06:20,139 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 11 [2023-02-17 09:06:20,139 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [318713226] [2023-02-17 09:06:20,139 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 09:06:20,140 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-02-17 09:06:20,140 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 09:06:20,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-02-17 09:06:20,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2023-02-17 09:06:20,141 INFO L87 Difference]: Start difference. First operand 96 states and 119 transitions. Second operand has 12 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 8 states have internal predecessors, (24), 4 states have call successors, (4), 4 states have call predecessors, (4), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 09:06:20,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 09:06:20,311 INFO L93 Difference]: Finished difference Result 274 states and 356 transitions. [2023-02-17 09:06:20,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-02-17 09:06:20,311 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 8 states have internal predecessors, (24), 4 states have call successors, (4), 4 states have call predecessors, (4), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2023-02-17 09:06:20,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 09:06:20,313 INFO L225 Difference]: With dead ends: 274 [2023-02-17 09:06:20,313 INFO L226 Difference]: Without dead ends: 272 [2023-02-17 09:06:20,314 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=104, Invalid=238, Unknown=0, NotChecked=0, Total=342 [2023-02-17 09:06:20,314 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 [2023-02-17 09:06:20,315 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] [2023-02-17 09:06:20,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2023-02-17 09:06:20,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 236. [2023-02-17 09:06:20,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 236 states, 182 states have (on average 1.2637362637362637) internal successors, (230), 189 states have internal predecessors, (230), 36 states have call successors, (36), 13 states have call predecessors, (36), 12 states have return successors, (33), 33 states have call predecessors, (33), 33 states have call successors, (33) [2023-02-17 09:06:20,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 299 transitions. [2023-02-17 09:06:20,389 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 299 transitions. Word has length 15 [2023-02-17 09:06:20,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 09:06:20,390 INFO L495 AbstractCegarLoop]: Abstraction has 236 states and 299 transitions. [2023-02-17 09:06:20,390 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 8 states have internal predecessors, (24), 4 states have call successors, (4), 4 states have call predecessors, (4), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 09:06:20,390 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 299 transitions. [2023-02-17 09:06:20,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-02-17 09:06:20,391 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 09:06:20,391 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 09:06:20,405 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-02-17 09:06:20,591 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-02-17 09:06:20,591 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2023-02-17 09:06:20,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 09:06:20,592 INFO L85 PathProgramCache]: Analyzing trace with hash 1422985811, now seen corresponding path program 1 times [2023-02-17 09:06:20,592 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 09:06:20,592 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1835397544] [2023-02-17 09:06:20,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 09:06:20,592 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 09:06:20,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 09:06:20,643 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 09:06:20,644 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 09:06:20,644 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1835397544] [2023-02-17 09:06:20,644 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1835397544] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 09:06:20,644 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1323172657] [2023-02-17 09:06:20,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 09:06:20,644 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 09:06:20,644 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 09:06:20,645 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-17 09:06:20,657 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-02-17 09:06:20,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 09:06:20,682 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjunts are in the unsatisfiable core [2023-02-17 09:06:20,683 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 09:06:20,710 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 09:06:20,710 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 09:06:20,743 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 09:06:20,743 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1323172657] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 09:06:20,743 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 09:06:20,743 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 11 [2023-02-17 09:06:20,743 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1732104844] [2023-02-17 09:06:20,744 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 09:06:20,744 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-02-17 09:06:20,744 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 09:06:20,745 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-02-17 09:06:20,745 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2023-02-17 09:06:20,745 INFO L87 Difference]: Start difference. First operand 236 states and 299 transitions. Second operand has 12 states, 10 states have (on average 2.6) internal successors, (26), 8 states have internal predecessors, (26), 4 states have call successors, (4), 4 states have call predecessors, (4), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 09:06:20,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 09:06:20,903 INFO L93 Difference]: Finished difference Result 512 states and 695 transitions. [2023-02-17 09:06:20,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-02-17 09:06:20,903 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 2.6) internal successors, (26), 8 states have internal predecessors, (26), 4 states have call successors, (4), 4 states have call predecessors, (4), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2023-02-17 09:06:20,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 09:06:20,906 INFO L225 Difference]: With dead ends: 512 [2023-02-17 09:06:20,906 INFO L226 Difference]: Without dead ends: 510 [2023-02-17 09:06:20,907 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 21 SyntacticMatches, 5 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=116, Invalid=264, Unknown=0, NotChecked=0, Total=380 [2023-02-17 09:06:20,907 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 164 mSDsluCounter, 150 mSDsCounter, 0 mSdLazyCounter, 192 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 167 SdHoareTripleChecker+Valid, 178 SdHoareTripleChecker+Invalid, 250 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 192 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-17 09:06:20,908 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [167 Valid, 178 Invalid, 250 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 192 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-17 09:06:20,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 510 states. [2023-02-17 09:06:20,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 510 to 445. [2023-02-17 09:06:20,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 445 states, 347 states have (on average 1.2276657060518732) internal successors, (426), 354 states have internal predecessors, (426), 69 states have call successors, (69), 24 states have call predecessors, (69), 23 states have return successors, (66), 66 states have call predecessors, (66), 66 states have call successors, (66) [2023-02-17 09:06:20,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 445 states to 445 states and 561 transitions. [2023-02-17 09:06:20,936 INFO L78 Accepts]: Start accepts. Automaton has 445 states and 561 transitions. Word has length 16 [2023-02-17 09:06:20,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 09:06:20,938 INFO L495 AbstractCegarLoop]: Abstraction has 445 states and 561 transitions. [2023-02-17 09:06:20,938 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 2.6) internal successors, (26), 8 states have internal predecessors, (26), 4 states have call successors, (4), 4 states have call predecessors, (4), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 09:06:20,938 INFO L276 IsEmpty]: Start isEmpty. Operand 445 states and 561 transitions. [2023-02-17 09:06:20,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-02-17 09:06:20,939 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 09:06:20,939 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 09:06:20,947 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-02-17 09:06:21,144 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2023-02-17 09:06:21,144 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2023-02-17 09:06:21,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 09:06:21,145 INFO L85 PathProgramCache]: Analyzing trace with hash 1106403678, now seen corresponding path program 1 times [2023-02-17 09:06:21,145 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 09:06:21,145 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1257576277] [2023-02-17 09:06:21,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 09:06:21,146 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 09:06:21,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 09:06:21,178 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-02-17 09:06:21,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 09:06:21,194 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-17 09:06:21,195 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 09:06:21,195 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1257576277] [2023-02-17 09:06:21,195 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1257576277] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 09:06:21,195 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [922080853] [2023-02-17 09:06:21,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 09:06:21,195 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 09:06:21,195 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 09:06:21,196 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-17 09:06:21,228 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-02-17 09:06:21,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 09:06:21,278 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 6 conjunts are in the unsatisfiable core [2023-02-17 09:06:21,279 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 09:06:21,318 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-17 09:06:21,318 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-17 09:06:21,318 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [922080853] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 09:06:21,319 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-02-17 09:06:21,319 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7] total 12 [2023-02-17 09:06:21,319 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [562306870] [2023-02-17 09:06:21,319 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 09:06:21,319 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-02-17 09:06:21,319 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 09:06:21,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-02-17 09:06:21,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2023-02-17 09:06:21,321 INFO L87 Difference]: Start difference. First operand 445 states and 561 transitions. Second operand has 7 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-17 09:06:21,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 09:06:21,415 INFO L93 Difference]: Finished difference Result 478 states and 600 transitions. [2023-02-17 09:06:21,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-02-17 09:06:21,416 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 24 [2023-02-17 09:06:21,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 09:06:21,419 INFO L225 Difference]: With dead ends: 478 [2023-02-17 09:06:21,422 INFO L226 Difference]: Without dead ends: 477 [2023-02-17 09:06:21,422 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2023-02-17 09:06:21,428 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 45 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-17 09:06:21,428 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] [2023-02-17 09:06:21,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 477 states. [2023-02-17 09:06:21,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 477 to 444. [2023-02-17 09:06:21,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 444 states, 347 states have (on average 1.2161383285302594) internal successors, (422), 353 states have internal predecessors, (422), 69 states have call successors, (69), 24 states have call predecessors, (69), 23 states have return successors, (66), 66 states have call predecessors, (66), 66 states have call successors, (66) [2023-02-17 09:06:21,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 444 states to 444 states and 557 transitions. [2023-02-17 09:06:21,493 INFO L78 Accepts]: Start accepts. Automaton has 444 states and 557 transitions. Word has length 24 [2023-02-17 09:06:21,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 09:06:21,493 INFO L495 AbstractCegarLoop]: Abstraction has 444 states and 557 transitions. [2023-02-17 09:06:21,493 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-17 09:06:21,494 INFO L276 IsEmpty]: Start isEmpty. Operand 444 states and 557 transitions. [2023-02-17 09:06:21,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-02-17 09:06:21,498 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 09:06:21,499 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 09:06:21,504 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-02-17 09:06:21,704 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 09:06:21,705 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2023-02-17 09:06:21,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 09:06:21,705 INFO L85 PathProgramCache]: Analyzing trace with hash -61224288, now seen corresponding path program 1 times [2023-02-17 09:06:21,705 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 09:06:21,705 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [432258670] [2023-02-17 09:06:21,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 09:06:21,706 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 09:06:21,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 09:06:21,807 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-02-17 09:06:21,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 09:06:21,842 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-17 09:06:21,842 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 09:06:21,842 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [432258670] [2023-02-17 09:06:21,842 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [432258670] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 09:06:21,842 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1253671909] [2023-02-17 09:06:21,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 09:06:21,842 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 09:06:21,843 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 09:06:21,857 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-17 09:06:21,889 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-02-17 09:06:21,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 09:06:21,936 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 10 conjunts are in the unsatisfiable core [2023-02-17 09:06:21,937 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 09:06:21,982 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-17 09:06:21,982 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 09:06:22,097 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-17 09:06:22,098 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1253671909] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 09:06:22,098 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 09:06:22,098 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 19 [2023-02-17 09:06:22,099 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1381251943] [2023-02-17 09:06:22,099 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 09:06:22,099 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-02-17 09:06:22,099 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 09:06:22,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-02-17 09:06:22,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=299, Unknown=0, NotChecked=0, Total=342 [2023-02-17 09:06:22,101 INFO L87 Difference]: Start difference. First operand 444 states and 557 transitions. Second operand has 19 states, 17 states have (on average 3.235294117647059) internal successors, (55), 16 states have internal predecessors, (55), 8 states have call successors, (9), 4 states have call predecessors, (9), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-17 09:06:22,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 09:06:22,454 INFO L93 Difference]: Finished difference Result 1120 states and 1574 transitions. [2023-02-17 09:06:22,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-02-17 09:06:22,454 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 17 states have (on average 3.235294117647059) internal successors, (55), 16 states have internal predecessors, (55), 8 states have call successors, (9), 4 states have call predecessors, (9), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 25 [2023-02-17 09:06:22,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 09:06:22,460 INFO L225 Difference]: With dead ends: 1120 [2023-02-17 09:06:22,460 INFO L226 Difference]: Without dead ends: 780 [2023-02-17 09:06:22,464 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 42 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=218, Invalid=904, Unknown=0, NotChecked=0, Total=1122 [2023-02-17 09:06:22,466 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 254 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 473 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 254 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 566 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 473 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-17 09:06:22,466 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [254 Valid, 91 Invalid, 566 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 473 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-17 09:06:22,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 780 states. [2023-02-17 09:06:22,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 780 to 578. [2023-02-17 09:06:22,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 578 states, 449 states have (on average 1.2115812917594655) internal successors, (544), 468 states have internal predecessors, (544), 86 states have call successors, (86), 36 states have call predecessors, (86), 38 states have return successors, (90), 73 states have call predecessors, (90), 66 states have call successors, (90) [2023-02-17 09:06:22,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 578 states to 578 states and 720 transitions. [2023-02-17 09:06:22,514 INFO L78 Accepts]: Start accepts. Automaton has 578 states and 720 transitions. Word has length 25 [2023-02-17 09:06:22,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 09:06:22,516 INFO L495 AbstractCegarLoop]: Abstraction has 578 states and 720 transitions. [2023-02-17 09:06:22,516 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 17 states have (on average 3.235294117647059) internal successors, (55), 16 states have internal predecessors, (55), 8 states have call successors, (9), 4 states have call predecessors, (9), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-17 09:06:22,516 INFO L276 IsEmpty]: Start isEmpty. Operand 578 states and 720 transitions. [2023-02-17 09:06:22,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-02-17 09:06:22,519 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 09:06:22,519 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2023-02-17 09:06:22,542 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-02-17 09:06:22,726 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 09:06:22,726 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ackermannErr6ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2023-02-17 09:06:22,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 09:06:22,727 INFO L85 PathProgramCache]: Analyzing trace with hash -1846384600, now seen corresponding path program 1 times [2023-02-17 09:06:22,727 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 09:06:22,727 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1373633561] [2023-02-17 09:06:22,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 09:06:22,728 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 09:06:22,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 09:06:22,823 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 09:06:22,823 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 09:06:22,824 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1373633561] [2023-02-17 09:06:22,824 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1373633561] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 09:06:22,825 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [777028699] [2023-02-17 09:06:22,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 09:06:22,825 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 09:06:22,825 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 09:06:22,826 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-17 09:06:22,829 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-02-17 09:06:22,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 09:06:22,868 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 8 conjunts are in the unsatisfiable core [2023-02-17 09:06:22,869 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 09:06:22,896 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 09:06:22,899 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 09:06:22,945 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 09:06:22,946 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [777028699] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 09:06:22,946 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 09:06:22,953 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 15 [2023-02-17 09:06:22,953 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1827688744] [2023-02-17 09:06:22,954 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 09:06:22,955 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-02-17 09:06:22,955 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 09:06:22,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-02-17 09:06:22,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2023-02-17 09:06:22,956 INFO L87 Difference]: Start difference. First operand 578 states and 720 transitions. Second operand has 16 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 10 states have internal predecessors, (45), 6 states have call successors, (6), 6 states have call predecessors, (6), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 09:06:23,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 09:06:23,272 INFO L93 Difference]: Finished difference Result 1048 states and 1335 transitions. [2023-02-17 09:06:23,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-02-17 09:06:23,273 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 10 states have internal predecessors, (45), 6 states have call successors, (6), 6 states have call predecessors, (6), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2023-02-17 09:06:23,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 09:06:23,277 INFO L225 Difference]: With dead ends: 1048 [2023-02-17 09:06:23,277 INFO L226 Difference]: Without dead ends: 1047 [2023-02-17 09:06:23,278 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 42 SyntacticMatches, 4 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=214, Invalid=488, Unknown=0, NotChecked=0, Total=702 [2023-02-17 09:06:23,279 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 270 mSDsluCounter, 210 mSDsCounter, 0 mSdLazyCounter, 284 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 273 SdHoareTripleChecker+Valid, 248 SdHoareTripleChecker+Invalid, 361 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 284 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-17 09:06:23,279 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [273 Valid, 248 Invalid, 361 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 284 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-17 09:06:23,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1047 states. [2023-02-17 09:06:23,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1047 to 894. [2023-02-17 09:06:23,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 894 states, 697 states have (on average 1.1764705882352942) internal successors, (820), 728 states have internal predecessors, (820), 130 states have call successors, (130), 56 states have call predecessors, (130), 62 states have return successors, (138), 109 states have call predecessors, (138), 102 states have call successors, (138) [2023-02-17 09:06:23,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 894 states to 894 states and 1088 transitions. [2023-02-17 09:06:23,312 INFO L78 Accepts]: Start accepts. Automaton has 894 states and 1088 transitions. Word has length 27 [2023-02-17 09:06:23,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 09:06:23,313 INFO L495 AbstractCegarLoop]: Abstraction has 894 states and 1088 transitions. [2023-02-17 09:06:23,313 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 10 states have internal predecessors, (45), 6 states have call successors, (6), 6 states have call predecessors, (6), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 09:06:23,313 INFO L276 IsEmpty]: Start isEmpty. Operand 894 states and 1088 transitions. [2023-02-17 09:06:23,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-02-17 09:06:23,314 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 09:06:23,314 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 09:06:23,319 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-02-17 09:06:23,519 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-02-17 09:06:23,519 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ackermannErr6ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2023-02-17 09:06:23,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 09:06:23,520 INFO L85 PathProgramCache]: Analyzing trace with hash 1298021223, now seen corresponding path program 1 times [2023-02-17 09:06:23,520 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 09:06:23,520 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1907949562] [2023-02-17 09:06:23,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 09:06:23,520 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 09:06:23,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 09:06:23,565 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-02-17 09:06:23,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 09:06:23,605 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-02-17 09:06:23,606 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 09:06:23,606 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1907949562] [2023-02-17 09:06:23,606 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1907949562] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 09:06:23,606 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1783930059] [2023-02-17 09:06:23,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 09:06:23,606 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 09:06:23,607 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 09:06:23,607 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-17 09:06:23,610 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-02-17 09:06:23,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 09:06:23,642 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 10 conjunts are in the unsatisfiable core [2023-02-17 09:06:23,644 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 09:06:23,659 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-02-17 09:06:23,659 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 09:06:23,716 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-02-17 09:06:23,717 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1783930059] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 09:06:23,717 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 09:06:23,717 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2023-02-17 09:06:23,718 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2068305731] [2023-02-17 09:06:23,719 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 09:06:23,719 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-02-17 09:06:23,719 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 09:06:23,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-02-17 09:06:23,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2023-02-17 09:06:23,720 INFO L87 Difference]: Start difference. First operand 894 states and 1088 transitions. Second operand has 15 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 13 states have internal predecessors, (37), 6 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-17 09:06:23,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 09:06:23,864 INFO L93 Difference]: Finished difference Result 1014 states and 1281 transitions. [2023-02-17 09:06:23,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-02-17 09:06:23,864 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 13 states have internal predecessors, (37), 6 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 27 [2023-02-17 09:06:23,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 09:06:23,868 INFO L225 Difference]: With dead ends: 1014 [2023-02-17 09:06:23,869 INFO L226 Difference]: Without dead ends: 1013 [2023-02-17 09:06:23,869 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 46 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=110, Invalid=352, Unknown=0, NotChecked=0, Total=462 [2023-02-17 09:06:23,870 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 134 mSDsluCounter, 111 mSDsCounter, 0 mSdLazyCounter, 180 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 131 SdHoareTripleChecker+Invalid, 236 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 180 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-17 09:06:23,870 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [134 Valid, 131 Invalid, 236 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 180 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-17 09:06:23,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1013 states. [2023-02-17 09:06:23,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1013 to 932. [2023-02-17 09:06:23,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 932 states, 730 states have (on average 1.1767123287671233) internal successors, (859), 757 states have internal predecessors, (859), 135 states have call successors, (135), 61 states have call predecessors, (135), 62 states have return successors, (138), 113 states have call predecessors, (138), 102 states have call successors, (138) [2023-02-17 09:06:23,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 932 states to 932 states and 1132 transitions. [2023-02-17 09:06:23,902 INFO L78 Accepts]: Start accepts. Automaton has 932 states and 1132 transitions. Word has length 27 [2023-02-17 09:06:23,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 09:06:23,903 INFO L495 AbstractCegarLoop]: Abstraction has 932 states and 1132 transitions. [2023-02-17 09:06:23,903 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 13 states have internal predecessors, (37), 6 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-17 09:06:23,903 INFO L276 IsEmpty]: Start isEmpty. Operand 932 states and 1132 transitions. [2023-02-17 09:06:23,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2023-02-17 09:06:23,914 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 09:06:23,914 INFO L195 NwaCegarLoop]: trace histogram [4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 09:06:23,931 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-02-17 09:06:24,119 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 09:06:24,120 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2023-02-17 09:06:24,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 09:06:24,120 INFO L85 PathProgramCache]: Analyzing trace with hash -722353775, now seen corresponding path program 1 times [2023-02-17 09:06:24,120 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 09:06:24,120 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [378177700] [2023-02-17 09:06:24,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 09:06:24,121 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 09:06:24,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 09:06:24,178 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-02-17 09:06:24,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 09:06:24,198 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-02-17 09:06:24,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 09:06:24,240 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-02-17 09:06:24,240 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 09:06:24,240 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [378177700] [2023-02-17 09:06:24,240 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [378177700] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 09:06:24,240 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1112595856] [2023-02-17 09:06:24,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 09:06:24,241 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 09:06:24,241 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 09:06:24,256 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-17 09:06:24,299 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-02-17 09:06:24,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 09:06:24,324 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 9 conjunts are in the unsatisfiable core [2023-02-17 09:06:24,325 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 09:06:24,348 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-02-17 09:06:24,348 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 09:06:24,427 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-02-17 09:06:24,428 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1112595856] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 09:06:24,428 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 09:06:24,428 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2023-02-17 09:06:24,428 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [535606008] [2023-02-17 09:06:24,428 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 09:06:24,429 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-02-17 09:06:24,429 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 09:06:24,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-02-17 09:06:24,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2023-02-17 09:06:24,430 INFO L87 Difference]: Start difference. First operand 932 states and 1132 transitions. Second operand has 18 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 14 states have internal predecessors, (43), 3 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (5), 4 states have call predecessors, (5), 1 states have call successors, (5) [2023-02-17 09:06:24,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 09:06:24,748 INFO L93 Difference]: Finished difference Result 1421 states and 2074 transitions. [2023-02-17 09:06:24,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-02-17 09:06:24,748 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 14 states have internal predecessors, (43), 3 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (5), 4 states have call predecessors, (5), 1 states have call successors, (5) Word has length 34 [2023-02-17 09:06:24,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 09:06:24,754 INFO L225 Difference]: With dead ends: 1421 [2023-02-17 09:06:24,754 INFO L226 Difference]: Without dead ends: 1419 [2023-02-17 09:06:24,755 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 62 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=188, Invalid=682, Unknown=0, NotChecked=0, Total=870 [2023-02-17 09:06:24,756 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 171 mSDsluCounter, 151 mSDsCounter, 0 mSdLazyCounter, 312 mSolverCounterSat, 165 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 171 SdHoareTripleChecker+Valid, 177 SdHoareTripleChecker+Invalid, 477 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 165 IncrementalHoareTripleChecker+Valid, 312 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-17 09:06:24,756 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [171 Valid, 177 Invalid, 477 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [165 Valid, 312 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-17 09:06:24,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1419 states. [2023-02-17 09:06:24,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1419 to 1226. [2023-02-17 09:06:24,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1226 states, 922 states have (on average 1.1637744034707158) internal successors, (1073), 960 states have internal predecessors, (1073), 192 states have call successors, (192), 68 states have call predecessors, (192), 107 states have return successors, (366), 197 states have call predecessors, (366), 158 states have call successors, (366) [2023-02-17 09:06:24,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1226 states to 1226 states and 1631 transitions. [2023-02-17 09:06:24,816 INFO L78 Accepts]: Start accepts. Automaton has 1226 states and 1631 transitions. Word has length 34 [2023-02-17 09:06:24,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 09:06:24,817 INFO L495 AbstractCegarLoop]: Abstraction has 1226 states and 1631 transitions. [2023-02-17 09:06:24,817 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 14 states have internal predecessors, (43), 3 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (5), 4 states have call predecessors, (5), 1 states have call successors, (5) [2023-02-17 09:06:24,818 INFO L276 IsEmpty]: Start isEmpty. Operand 1226 states and 1631 transitions. [2023-02-17 09:06:24,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2023-02-17 09:06:24,818 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 09:06:24,818 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 09:06:24,845 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-02-17 09:06:25,046 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 09:06:25,047 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ackermannErr6ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2023-02-17 09:06:25,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 09:06:25,047 INFO L85 PathProgramCache]: Analyzing trace with hash 1607744024, now seen corresponding path program 1 times [2023-02-17 09:06:25,047 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 09:06:25,047 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1834204517] [2023-02-17 09:06:25,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 09:06:25,047 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 09:06:25,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 09:06:25,129 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-02-17 09:06:25,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 09:06:25,146 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-02-17 09:06:25,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 09:06:25,173 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 14 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-02-17 09:06:25,173 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 09:06:25,173 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1834204517] [2023-02-17 09:06:25,173 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1834204517] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 09:06:25,173 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2017396656] [2023-02-17 09:06:25,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 09:06:25,173 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 09:06:25,174 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 09:06:25,201 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-17 09:06:25,202 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-02-17 09:06:25,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 09:06:25,236 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 9 conjunts are in the unsatisfiable core [2023-02-17 09:06:25,238 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 09:06:25,265 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 12 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-02-17 09:06:25,266 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 09:06:25,329 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-02-17 09:06:25,330 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2017396656] provided 1 perfect and 1 imperfect interpolant sequences [2023-02-17 09:06:25,330 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-02-17 09:06:25,330 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8, 8] total 17 [2023-02-17 09:06:25,330 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1435199318] [2023-02-17 09:06:25,330 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 09:06:25,330 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-02-17 09:06:25,330 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 09:06:25,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-02-17 09:06:25,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2023-02-17 09:06:25,331 INFO L87 Difference]: Start difference. First operand 1226 states and 1631 transitions. Second operand has 9 states, 8 states have (on average 3.5) internal successors, (28), 7 states have internal predecessors, (28), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-17 09:06:25,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 09:06:25,505 INFO L93 Difference]: Finished difference Result 1333 states and 1854 transitions. [2023-02-17 09:06:25,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-02-17 09:06:25,505 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 3.5) internal successors, (28), 7 states have internal predecessors, (28), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 36 [2023-02-17 09:06:25,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 09:06:25,510 INFO L225 Difference]: With dead ends: 1333 [2023-02-17 09:06:25,510 INFO L226 Difference]: Without dead ends: 1332 [2023-02-17 09:06:25,511 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 60 SyntacticMatches, 6 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=100, Invalid=550, Unknown=0, NotChecked=0, Total=650 [2023-02-17 09:06:25,511 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 70 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 166 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 209 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 166 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-17 09:06:25,512 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [76 Valid, 134 Invalid, 209 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 166 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-17 09:06:25,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1332 states. [2023-02-17 09:06:25,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1332 to 1234. [2023-02-17 09:06:25,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1234 states, 930 states have (on average 1.1591397849462366) internal successors, (1078), 964 states have internal predecessors, (1078), 196 states have call successors, (196), 68 states have call predecessors, (196), 103 states have return successors, (290), 201 states have call predecessors, (290), 162 states have call successors, (290) [2023-02-17 09:06:25,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1234 states to 1234 states and 1564 transitions. [2023-02-17 09:06:25,564 INFO L78 Accepts]: Start accepts. Automaton has 1234 states and 1564 transitions. Word has length 36 [2023-02-17 09:06:25,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 09:06:25,564 INFO L495 AbstractCegarLoop]: Abstraction has 1234 states and 1564 transitions. [2023-02-17 09:06:25,564 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 3.5) internal successors, (28), 7 states have internal predecessors, (28), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-17 09:06:25,564 INFO L276 IsEmpty]: Start isEmpty. Operand 1234 states and 1564 transitions. [2023-02-17 09:06:25,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-02-17 09:06:25,565 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 09:06:25,565 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 09:06:25,581 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-02-17 09:06:25,770 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-02-17 09:06:25,771 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ackermannErr6ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2023-02-17 09:06:25,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 09:06:25,771 INFO L85 PathProgramCache]: Analyzing trace with hash -1310665197, now seen corresponding path program 2 times [2023-02-17 09:06:25,771 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 09:06:25,771 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [8688278] [2023-02-17 09:06:25,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 09:06:25,772 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 09:06:25,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 09:06:25,832 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2023-02-17 09:06:25,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 09:06:25,850 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 2 proven. 40 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-02-17 09:06:25,851 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 09:06:25,851 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [8688278] [2023-02-17 09:06:25,851 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [8688278] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 09:06:25,851 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [636668809] [2023-02-17 09:06:25,851 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-17 09:06:25,851 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 09:06:25,852 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 09:06:25,877 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-17 09:06:25,895 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-02-17 09:06:25,926 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-17 09:06:25,927 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-17 09:06:25,927 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 14 conjunts are in the unsatisfiable core [2023-02-17 09:06:25,928 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 09:06:25,968 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 2 proven. 40 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-02-17 09:06:25,968 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 09:06:26,054 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 4 proven. 38 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-02-17 09:06:26,054 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [636668809] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 09:06:26,055 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 09:06:26,055 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 22 [2023-02-17 09:06:26,055 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [621091616] [2023-02-17 09:06:26,055 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 09:06:26,055 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-02-17 09:06:26,055 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 09:06:26,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-02-17 09:06:26,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2023-02-17 09:06:26,056 INFO L87 Difference]: Start difference. First operand 1234 states and 1564 transitions. Second operand has 23 states, 20 states have (on average 3.05) internal successors, (61), 17 states have internal predecessors, (61), 8 states have call successors, (10), 7 states have call predecessors, (10), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-17 09:06:26,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 09:06:26,395 INFO L93 Difference]: Finished difference Result 1514 states and 1957 transitions. [2023-02-17 09:06:26,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-02-17 09:06:26,396 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 20 states have (on average 3.05) internal successors, (61), 17 states have internal predecessors, (61), 8 states have call successors, (10), 7 states have call predecessors, (10), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 43 [2023-02-17 09:06:26,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 09:06:26,400 INFO L225 Difference]: With dead ends: 1514 [2023-02-17 09:06:26,400 INFO L226 Difference]: Without dead ends: 1513 [2023-02-17 09:06:26,401 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 69 SyntacticMatches, 8 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 318 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=420, Invalid=1302, Unknown=0, NotChecked=0, Total=1722 [2023-02-17 09:06:26,402 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 382 mSDsluCounter, 187 mSDsCounter, 0 mSdLazyCounter, 329 mSolverCounterSat, 136 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 382 SdHoareTripleChecker+Valid, 207 SdHoareTripleChecker+Invalid, 465 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 136 IncrementalHoareTripleChecker+Valid, 329 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-17 09:06:26,402 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [382 Valid, 207 Invalid, 465 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [136 Valid, 329 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-17 09:06:26,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1513 states. [2023-02-17 09:06:26,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1513 to 1270. [2023-02-17 09:06:26,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1270 states, 959 states have (on average 1.159541188738269) internal successors, (1112), 992 states have internal predecessors, (1112), 203 states have call successors, (203), 72 states have call predecessors, (203), 103 states have return successors, (290), 205 states have call predecessors, (290), 162 states have call successors, (290) [2023-02-17 09:06:26,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1270 states to 1270 states and 1605 transitions. [2023-02-17 09:06:26,455 INFO L78 Accepts]: Start accepts. Automaton has 1270 states and 1605 transitions. Word has length 43 [2023-02-17 09:06:26,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 09:06:26,456 INFO L495 AbstractCegarLoop]: Abstraction has 1270 states and 1605 transitions. [2023-02-17 09:06:26,456 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 20 states have (on average 3.05) internal successors, (61), 17 states have internal predecessors, (61), 8 states have call successors, (10), 7 states have call predecessors, (10), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-17 09:06:26,456 INFO L276 IsEmpty]: Start isEmpty. Operand 1270 states and 1605 transitions. [2023-02-17 09:06:26,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2023-02-17 09:06:26,457 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 09:06:26,457 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 09:06:26,464 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-02-17 09:06:26,662 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-02-17 09:06:26,662 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ackermannErr6ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2023-02-17 09:06:26,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 09:06:26,663 INFO L85 PathProgramCache]: Analyzing trace with hash -1058043410, now seen corresponding path program 2 times [2023-02-17 09:06:26,663 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 09:06:26,663 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1038027969] [2023-02-17 09:06:26,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 09:06:26,663 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 09:06:26,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 09:06:26,711 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-02-17 09:06:26,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 09:06:26,726 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-02-17 09:06:26,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 09:06:26,743 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 26 proven. 8 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-02-17 09:06:26,743 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 09:06:26,744 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1038027969] [2023-02-17 09:06:26,744 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1038027969] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 09:06:26,744 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1486677751] [2023-02-17 09:06:26,744 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-17 09:06:26,744 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 09:06:26,744 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 09:06:26,745 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-17 09:06:26,762 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-02-17 09:06:26,779 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-17 09:06:26,779 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-17 09:06:26,780 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 11 conjunts are in the unsatisfiable core [2023-02-17 09:06:26,781 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 09:06:26,824 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 24 proven. 10 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-02-17 09:06:26,824 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 09:06:26,904 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 28 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-02-17 09:06:26,905 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1486677751] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 09:06:26,905 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 09:06:26,905 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 21 [2023-02-17 09:06:26,905 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [263288195] [2023-02-17 09:06:26,905 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 09:06:26,905 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-02-17 09:06:26,905 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 09:06:26,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-02-17 09:06:26,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2023-02-17 09:06:26,906 INFO L87 Difference]: Start difference. First operand 1270 states and 1605 transitions. Second operand has 22 states, 21 states have (on average 2.9047619047619047) internal successors, (61), 16 states have internal predecessors, (61), 5 states have call successors, (7), 5 states have call predecessors, (7), 5 states have return successors, (5), 4 states have call predecessors, (5), 1 states have call successors, (5) [2023-02-17 09:06:27,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 09:06:27,564 INFO L93 Difference]: Finished difference Result 2781 states and 4049 transitions. [2023-02-17 09:06:27,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-02-17 09:06:27,565 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 2.9047619047619047) internal successors, (61), 16 states have internal predecessors, (61), 5 states have call successors, (7), 5 states have call predecessors, (7), 5 states have return successors, (5), 4 states have call predecessors, (5), 1 states have call successors, (5) Word has length 44 [2023-02-17 09:06:27,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 09:06:27,572 INFO L225 Difference]: With dead ends: 2781 [2023-02-17 09:06:27,572 INFO L226 Difference]: Without dead ends: 1922 [2023-02-17 09:06:27,576 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 78 SyntacticMatches, 8 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 499 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=582, Invalid=1968, Unknown=0, NotChecked=0, Total=2550 [2023-02-17 09:06:27,577 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 289 mSDsluCounter, 203 mSDsCounter, 0 mSdLazyCounter, 499 mSolverCounterSat, 375 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 289 SdHoareTripleChecker+Valid, 239 SdHoareTripleChecker+Invalid, 874 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 375 IncrementalHoareTripleChecker+Valid, 499 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-17 09:06:27,577 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [289 Valid, 239 Invalid, 874 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [375 Valid, 499 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-17 09:06:27,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1922 states. [2023-02-17 09:06:27,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1922 to 1449. [2023-02-17 09:06:27,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1449 states, 1096 states have (on average 1.1496350364963503) internal successors, (1260), 1135 states have internal predecessors, (1260), 227 states have call successors, (227), 86 states have call predecessors, (227), 121 states have return successors, (328), 227 states have call predecessors, (328), 181 states have call successors, (328) [2023-02-17 09:06:27,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1449 states to 1449 states and 1815 transitions. [2023-02-17 09:06:27,642 INFO L78 Accepts]: Start accepts. Automaton has 1449 states and 1815 transitions. Word has length 44 [2023-02-17 09:06:27,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 09:06:27,643 INFO L495 AbstractCegarLoop]: Abstraction has 1449 states and 1815 transitions. [2023-02-17 09:06:27,643 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 2.9047619047619047) internal successors, (61), 16 states have internal predecessors, (61), 5 states have call successors, (7), 5 states have call predecessors, (7), 5 states have return successors, (5), 4 states have call predecessors, (5), 1 states have call successors, (5) [2023-02-17 09:06:27,643 INFO L276 IsEmpty]: Start isEmpty. Operand 1449 states and 1815 transitions. [2023-02-17 09:06:27,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2023-02-17 09:06:27,644 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 09:06:27,644 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 09:06:27,651 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-02-17 09:06:27,849 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-02-17 09:06:27,849 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ackermannErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2023-02-17 09:06:27,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 09:06:27,850 INFO L85 PathProgramCache]: Analyzing trace with hash 407823314, now seen corresponding path program 1 times [2023-02-17 09:06:27,850 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 09:06:27,850 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1121183899] [2023-02-17 09:06:27,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 09:06:27,850 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 09:06:27,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 09:06:27,886 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2023-02-17 09:06:27,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 09:06:27,896 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 38 proven. 5 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-02-17 09:06:27,896 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 09:06:27,896 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1121183899] [2023-02-17 09:06:27,896 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1121183899] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 09:06:27,897 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [164187190] [2023-02-17 09:06:27,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 09:06:27,897 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 09:06:27,897 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 09:06:27,910 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-17 09:06:27,911 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-02-17 09:06:27,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 09:06:27,945 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 9 conjunts are in the unsatisfiable core [2023-02-17 09:06:27,946 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 09:06:27,985 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 52 proven. 3 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-02-17 09:06:27,986 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 09:06:28,034 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 53 proven. 2 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-02-17 09:06:28,034 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [164187190] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 09:06:28,034 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 09:06:28,035 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 16 [2023-02-17 09:06:28,035 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1905065499] [2023-02-17 09:06:28,035 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 09:06:28,035 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-02-17 09:06:28,035 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 09:06:28,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-02-17 09:06:28,036 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2023-02-17 09:06:28,036 INFO L87 Difference]: Start difference. First operand 1449 states and 1815 transitions. Second operand has 16 states, 16 states have (on average 3.375) internal successors, (54), 13 states have internal predecessors, (54), 6 states have call successors, (9), 5 states have call predecessors, (9), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-02-17 09:06:28,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 09:06:28,387 INFO L93 Difference]: Finished difference Result 1875 states and 2461 transitions. [2023-02-17 09:06:28,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-02-17 09:06:28,388 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.375) internal successors, (54), 13 states have internal predecessors, (54), 6 states have call successors, (9), 5 states have call predecessors, (9), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 51 [2023-02-17 09:06:28,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 09:06:28,394 INFO L225 Difference]: With dead ends: 1875 [2023-02-17 09:06:28,394 INFO L226 Difference]: Without dead ends: 1807 [2023-02-17 09:06:28,395 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 89 SyntacticMatches, 7 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 246 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=334, Invalid=926, Unknown=0, NotChecked=0, Total=1260 [2023-02-17 09:06:28,395 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 204 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 427 mSolverCounterSat, 159 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 204 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 586 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 159 IncrementalHoareTripleChecker+Valid, 427 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-17 09:06:28,396 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [204 Valid, 71 Invalid, 586 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [159 Valid, 427 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-17 09:06:28,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1807 states. [2023-02-17 09:06:28,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1807 to 1391. [2023-02-17 09:06:28,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1391 states, 1050 states have (on average 1.140952380952381) internal successors, (1198), 1093 states have internal predecessors, (1198), 216 states have call successors, (216), 79 states have call predecessors, (216), 121 states have return successors, (328), 218 states have call predecessors, (328), 181 states have call successors, (328) [2023-02-17 09:06:28,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1391 states to 1391 states and 1742 transitions. [2023-02-17 09:06:28,463 INFO L78 Accepts]: Start accepts. Automaton has 1391 states and 1742 transitions. Word has length 51 [2023-02-17 09:06:28,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 09:06:28,464 INFO L495 AbstractCegarLoop]: Abstraction has 1391 states and 1742 transitions. [2023-02-17 09:06:28,464 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.375) internal successors, (54), 13 states have internal predecessors, (54), 6 states have call successors, (9), 5 states have call predecessors, (9), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-02-17 09:06:28,464 INFO L276 IsEmpty]: Start isEmpty. Operand 1391 states and 1742 transitions. [2023-02-17 09:06:28,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2023-02-17 09:06:28,465 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 09:06:28,466 INFO L195 NwaCegarLoop]: trace histogram [6, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 09:06:28,485 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2023-02-17 09:06:28,671 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-02-17 09:06:28,671 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2023-02-17 09:06:28,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 09:06:28,672 INFO L85 PathProgramCache]: Analyzing trace with hash 843839239, now seen corresponding path program 1 times [2023-02-17 09:06:28,672 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 09:06:28,672 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [222166076] [2023-02-17 09:06:28,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 09:06:28,672 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 09:06:28,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 09:06:28,739 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-02-17 09:06:28,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 09:06:28,767 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-02-17 09:06:28,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 09:06:28,807 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-02-17 09:06:28,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 09:06:28,825 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2023-02-17 09:06:28,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 09:06:28,844 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 21 proven. 16 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-02-17 09:06:28,844 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 09:06:28,844 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [222166076] [2023-02-17 09:06:28,844 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [222166076] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 09:06:28,844 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [179822144] [2023-02-17 09:06:28,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 09:06:28,845 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 09:06:28,845 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 09:06:28,846 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-17 09:06:28,848 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-02-17 09:06:28,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 09:06:28,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 15 conjunts are in the unsatisfiable core [2023-02-17 09:06:28,888 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 09:06:28,922 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 14 proven. 18 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2023-02-17 09:06:28,923 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 09:06:29,065 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 18 proven. 19 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-02-17 09:06:29,065 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [179822144] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 09:06:29,065 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 09:06:29,065 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 13] total 26 [2023-02-17 09:06:29,066 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [30063474] [2023-02-17 09:06:29,066 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 09:06:29,066 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-02-17 09:06:29,066 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 09:06:29,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-02-17 09:06:29,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=614, Unknown=0, NotChecked=0, Total=702 [2023-02-17 09:06:29,067 INFO L87 Difference]: Start difference. First operand 1391 states and 1742 transitions. Second operand has 27 states, 26 states have (on average 2.230769230769231) internal successors, (58), 21 states have internal predecessors, (58), 5 states have call successors, (7), 3 states have call predecessors, (7), 8 states have return successors, (9), 8 states have call predecessors, (9), 3 states have call successors, (9) [2023-02-17 09:06:30,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 09:06:30,003 INFO L93 Difference]: Finished difference Result 3378 states and 5999 transitions. [2023-02-17 09:06:30,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2023-02-17 09:06:30,003 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 2.230769230769231) internal successors, (58), 21 states have internal predecessors, (58), 5 states have call successors, (7), 3 states have call predecessors, (7), 8 states have return successors, (9), 8 states have call predecessors, (9), 3 states have call successors, (9) Word has length 53 [2023-02-17 09:06:30,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 09:06:30,030 INFO L225 Difference]: With dead ends: 3378 [2023-02-17 09:06:30,030 INFO L226 Difference]: Without dead ends: 3376 [2023-02-17 09:06:30,034 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 95 SyntacticMatches, 6 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1696 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1154, Invalid=5008, Unknown=0, NotChecked=0, Total=6162 [2023-02-17 09:06:30,035 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 178 mSDsluCounter, 227 mSDsCounter, 0 mSdLazyCounter, 780 mSolverCounterSat, 427 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 191 SdHoareTripleChecker+Valid, 252 SdHoareTripleChecker+Invalid, 1207 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 427 IncrementalHoareTripleChecker+Valid, 780 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-02-17 09:06:30,035 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [191 Valid, 252 Invalid, 1207 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [427 Valid, 780 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-02-17 09:06:30,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3376 states. [2023-02-17 09:06:30,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3376 to 2468. [2023-02-17 09:06:30,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2468 states, 1732 states have (on average 1.1096997690531178) internal successors, (1922), 1778 states have internal predecessors, (1922), 433 states have call successors, (433), 93 states have call predecessors, (433), 299 states have return successors, (2469), 596 states have call predecessors, (2469), 396 states have call successors, (2469) [2023-02-17 09:06:30,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2468 states to 2468 states and 4824 transitions. [2023-02-17 09:06:30,268 INFO L78 Accepts]: Start accepts. Automaton has 2468 states and 4824 transitions. Word has length 53 [2023-02-17 09:06:30,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 09:06:30,268 INFO L495 AbstractCegarLoop]: Abstraction has 2468 states and 4824 transitions. [2023-02-17 09:06:30,268 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 2.230769230769231) internal successors, (58), 21 states have internal predecessors, (58), 5 states have call successors, (7), 3 states have call predecessors, (7), 8 states have return successors, (9), 8 states have call predecessors, (9), 3 states have call successors, (9) [2023-02-17 09:06:30,269 INFO L276 IsEmpty]: Start isEmpty. Operand 2468 states and 4824 transitions. [2023-02-17 09:06:30,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2023-02-17 09:06:30,271 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 09:06:30,271 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1] [2023-02-17 09:06:30,279 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-02-17 09:06:30,479 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-02-17 09:06:30,480 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ackermannErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2023-02-17 09:06:30,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 09:06:30,481 INFO L85 PathProgramCache]: Analyzing trace with hash 2013961680, now seen corresponding path program 1 times [2023-02-17 09:06:30,481 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 09:06:30,483 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [283379597] [2023-02-17 09:06:30,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 09:06:30,484 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 09:06:30,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 09:06:30,618 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 111 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-02-17 09:06:30,618 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 09:06:30,618 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [283379597] [2023-02-17 09:06:30,618 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [283379597] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 09:06:30,619 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [625422465] [2023-02-17 09:06:30,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 09:06:30,619 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 09:06:30,619 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 09:06:30,620 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-17 09:06:30,648 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-02-17 09:06:30,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 09:06:30,681 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 18 conjunts are in the unsatisfiable core [2023-02-17 09:06:30,682 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 09:06:30,761 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 111 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-02-17 09:06:30,762 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 09:06:30,902 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 111 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-02-17 09:06:30,902 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [625422465] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 09:06:30,903 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 09:06:30,903 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 23 [2023-02-17 09:06:30,903 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1773823390] [2023-02-17 09:06:30,903 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 09:06:30,903 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-02-17 09:06:30,904 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 09:06:30,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-02-17 09:06:30,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=416, Unknown=0, NotChecked=0, Total=552 [2023-02-17 09:06:30,905 INFO L87 Difference]: Start difference. First operand 2468 states and 4824 transitions. Second operand has 24 states, 23 states have (on average 3.652173913043478) internal successors, (84), 14 states have internal predecessors, (84), 10 states have call successors, (16), 10 states have call predecessors, (16), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 09:06:31,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 09:06:31,798 INFO L93 Difference]: Finished difference Result 7290 states and 13932 transitions. [2023-02-17 09:06:31,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2023-02-17 09:06:31,799 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 3.652173913043478) internal successors, (84), 14 states have internal predecessors, (84), 10 states have call successors, (16), 10 states have call predecessors, (16), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2023-02-17 09:06:31,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 09:06:31,850 INFO L225 Difference]: With dead ends: 7290 [2023-02-17 09:06:31,851 INFO L226 Difference]: Without dead ends: 7289 [2023-02-17 09:06:31,856 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 91 SyntacticMatches, 17 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 439 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=554, Invalid=1252, Unknown=0, NotChecked=0, Total=1806 [2023-02-17 09:06:31,856 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 721 mSDsluCounter, 275 mSDsCounter, 0 mSdLazyCounter, 370 mSolverCounterSat, 330 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 727 SdHoareTripleChecker+Valid, 304 SdHoareTripleChecker+Invalid, 700 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 330 IncrementalHoareTripleChecker+Valid, 370 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-17 09:06:31,857 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [727 Valid, 304 Invalid, 700 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [330 Valid, 370 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-17 09:06:31,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7289 states. [2023-02-17 09:06:32,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7289 to 6716. [2023-02-17 09:06:32,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6716 states, 4744 states have (on average 1.110876897133221) internal successors, (5270), 4850 states have internal predecessors, (5270), 1177 states have call successors, (1177), 273 states have call predecessors, (1177), 791 states have return successors, (6567), 1592 states have call predecessors, (6567), 1050 states have call successors, (6567) [2023-02-17 09:06:32,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6716 states to 6716 states and 13014 transitions. [2023-02-17 09:06:32,330 INFO L78 Accepts]: Start accepts. Automaton has 6716 states and 13014 transitions. Word has length 57 [2023-02-17 09:06:32,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 09:06:32,330 INFO L495 AbstractCegarLoop]: Abstraction has 6716 states and 13014 transitions. [2023-02-17 09:06:32,331 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 3.652173913043478) internal successors, (84), 14 states have internal predecessors, (84), 10 states have call successors, (16), 10 states have call predecessors, (16), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 09:06:32,331 INFO L276 IsEmpty]: Start isEmpty. Operand 6716 states and 13014 transitions. [2023-02-17 09:06:32,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2023-02-17 09:06:32,333 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 09:06:32,333 INFO L195 NwaCegarLoop]: trace histogram [6, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 09:06:32,355 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2023-02-17 09:06:32,537 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-02-17 09:06:32,538 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ackermannErr6ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2023-02-17 09:06:32,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 09:06:32,538 INFO L85 PathProgramCache]: Analyzing trace with hash -814290418, now seen corresponding path program 1 times [2023-02-17 09:06:32,538 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 09:06:32,539 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [117213618] [2023-02-17 09:06:32,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 09:06:32,540 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 09:06:32,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 09:06:32,593 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-02-17 09:06:32,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 09:06:32,626 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-02-17 09:06:32,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 09:06:32,644 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-02-17 09:06:32,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 09:06:32,661 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2023-02-17 09:06:32,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 09:06:32,683 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 36 proven. 6 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-02-17 09:06:32,683 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 09:06:32,683 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [117213618] [2023-02-17 09:06:32,683 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [117213618] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 09:06:32,684 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [989877296] [2023-02-17 09:06:32,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 09:06:32,684 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 09:06:32,684 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 09:06:32,699 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-17 09:06:32,739 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-02-17 09:06:32,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 09:06:32,752 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 15 conjunts are in the unsatisfiable core [2023-02-17 09:06:32,753 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 09:06:32,787 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 27 proven. 10 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2023-02-17 09:06:32,787 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 09:06:32,961 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 40 proven. 2 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-02-17 09:06:32,961 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [989877296] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 09:06:32,961 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 09:06:32,962 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 13] total 26 [2023-02-17 09:06:32,962 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [508249864] [2023-02-17 09:06:32,962 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 09:06:32,963 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-02-17 09:06:32,963 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 09:06:32,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-02-17 09:06:32,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=608, Unknown=0, NotChecked=0, Total=702 [2023-02-17 09:06:32,965 INFO L87 Difference]: Start difference. First operand 6716 states and 13014 transitions. Second operand has 27 states, 26 states have (on average 2.3846153846153846) internal successors, (62), 21 states have internal predecessors, (62), 5 states have call successors, (7), 3 states have call predecessors, (7), 8 states have return successors, (9), 8 states have call predecessors, (9), 3 states have call successors, (9) [2023-02-17 09:06:34,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 09:06:34,676 INFO L93 Difference]: Finished difference Result 24355 states and 82409 transitions. [2023-02-17 09:06:34,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2023-02-17 09:06:34,677 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 2.3846153846153846) internal successors, (62), 21 states have internal predecessors, (62), 5 states have call successors, (7), 3 states have call predecessors, (7), 8 states have return successors, (9), 8 states have call predecessors, (9), 3 states have call successors, (9) Word has length 55 [2023-02-17 09:06:34,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 09:06:35,126 INFO L225 Difference]: With dead ends: 24355 [2023-02-17 09:06:35,129 INFO L226 Difference]: Without dead ends: 18094 [2023-02-17 09:06:35,234 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 95 SyntacticMatches, 10 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 822 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=905, Invalid=3517, Unknown=0, NotChecked=0, Total=4422 [2023-02-17 09:06:35,235 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 132 mSDsluCounter, 278 mSDsCounter, 0 mSdLazyCounter, 749 mSolverCounterSat, 224 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 314 SdHoareTripleChecker+Invalid, 973 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 224 IncrementalHoareTripleChecker+Valid, 749 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-02-17 09:06:35,235 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [132 Valid, 314 Invalid, 973 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [224 Valid, 749 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-02-17 09:06:35,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18094 states. [2023-02-17 09:06:37,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18094 to 14204. [2023-02-17 09:06:37,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14204 states, 9444 states have (on average 1.0726387124099959) internal successors, (10130), 9522 states have internal predecessors, (10130), 2706 states have call successors, (2706), 364 states have call predecessors, (2706), 2050 states have return successors, (36260), 4317 states have call predecessors, (36260), 2553 states have call successors, (36260) [2023-02-17 09:06:37,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14204 states to 14204 states and 49096 transitions. [2023-02-17 09:06:37,291 INFO L78 Accepts]: Start accepts. Automaton has 14204 states and 49096 transitions. Word has length 55 [2023-02-17 09:06:37,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 09:06:37,292 INFO L495 AbstractCegarLoop]: Abstraction has 14204 states and 49096 transitions. [2023-02-17 09:06:37,292 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 2.3846153846153846) internal successors, (62), 21 states have internal predecessors, (62), 5 states have call successors, (7), 3 states have call predecessors, (7), 8 states have return successors, (9), 8 states have call predecessors, (9), 3 states have call successors, (9) [2023-02-17 09:06:37,292 INFO L276 IsEmpty]: Start isEmpty. Operand 14204 states and 49096 transitions. [2023-02-17 09:06:37,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2023-02-17 09:06:37,295 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 09:06:37,295 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1] [2023-02-17 09:06:37,319 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-02-17 09:06:37,500 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 09:06:37,501 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ackermannErr6ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2023-02-17 09:06:37,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 09:06:37,501 INFO L85 PathProgramCache]: Analyzing trace with hash 1321083776, now seen corresponding path program 2 times [2023-02-17 09:06:37,502 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 09:06:37,502 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [370952676] [2023-02-17 09:06:37,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 09:06:37,502 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 09:06:37,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 09:06:37,624 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 09:06:37,624 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 09:06:37,624 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [370952676] [2023-02-17 09:06:37,625 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [370952676] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 09:06:37,625 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [464527457] [2023-02-17 09:06:37,625 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-17 09:06:37,625 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 09:06:37,625 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 09:06:37,643 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-17 09:06:37,644 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-02-17 09:06:37,686 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-17 09:06:37,686 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-17 09:06:37,687 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 16 conjunts are in the unsatisfiable core [2023-02-17 09:06:37,688 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 09:06:37,776 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 09:06:37,777 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 09:06:37,949 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 09:06:37,950 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [464527457] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 09:06:37,950 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 09:06:37,950 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 31 [2023-02-17 09:06:37,950 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [453854265] [2023-02-17 09:06:37,950 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 09:06:37,950 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-02-17 09:06:37,950 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 09:06:37,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-02-17 09:06:37,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=244, Invalid=748, Unknown=0, NotChecked=0, Total=992 [2023-02-17 09:06:37,951 INFO L87 Difference]: Start difference. First operand 14204 states and 49096 transitions. Second operand has 32 states, 29 states have (on average 3.4827586206896552) internal successors, (101), 18 states have internal predecessors, (101), 14 states have call successors, (14), 14 states have call predecessors, (14), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 09:06:39,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 09:06:39,813 INFO L93 Difference]: Finished difference Result 22005 states and 73240 transitions. [2023-02-17 09:06:39,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2023-02-17 09:06:39,814 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 29 states have (on average 3.4827586206896552) internal successors, (101), 18 states have internal predecessors, (101), 14 states have call successors, (14), 14 states have call predecessors, (14), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2023-02-17 09:06:39,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 09:06:39,990 INFO L225 Difference]: With dead ends: 22005 [2023-02-17 09:06:39,990 INFO L226 Difference]: Without dead ends: 22004 [2023-02-17 09:06:40,007 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 90 SyntacticMatches, 12 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 795 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1054, Invalid=2368, Unknown=0, NotChecked=0, Total=3422 [2023-02-17 09:06:40,008 INFO L413 NwaCegarLoop]: 53 mSDtfsCounter, 713 mSDsluCounter, 477 mSDsCounter, 0 mSdLazyCounter, 718 mSolverCounterSat, 219 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 716 SdHoareTripleChecker+Valid, 530 SdHoareTripleChecker+Invalid, 937 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 219 IncrementalHoareTripleChecker+Valid, 718 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-02-17 09:06:40,008 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [716 Valid, 530 Invalid, 937 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [219 Valid, 718 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-02-17 09:06:40,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22004 states. [2023-02-17 09:06:41,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22004 to 20834. [2023-02-17 09:06:41,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20834 states, 13831 states have (on average 1.0657942303521075) internal successors, (14741), 14008 states have internal predecessors, (14741), 3890 states have call successors, (3890), 508 states have call predecessors, (3890), 3109 states have return successors, (51912), 6317 states have call predecessors, (51912), 3673 states have call successors, (51912) [2023-02-17 09:06:42,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20834 states to 20834 states and 70543 transitions. [2023-02-17 09:06:42,246 INFO L78 Accepts]: Start accepts. Automaton has 20834 states and 70543 transitions. Word has length 59 [2023-02-17 09:06:42,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 09:06:42,246 INFO L495 AbstractCegarLoop]: Abstraction has 20834 states and 70543 transitions. [2023-02-17 09:06:42,246 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 29 states have (on average 3.4827586206896552) internal successors, (101), 18 states have internal predecessors, (101), 14 states have call successors, (14), 14 states have call predecessors, (14), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 09:06:42,246 INFO L276 IsEmpty]: Start isEmpty. Operand 20834 states and 70543 transitions. [2023-02-17 09:06:42,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2023-02-17 09:06:42,250 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 09:06:42,250 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 09:06:42,256 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-02-17 09:06:42,455 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 09:06:42,457 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ackermannErr6ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2023-02-17 09:06:42,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 09:06:42,457 INFO L85 PathProgramCache]: Analyzing trace with hash -1343121217, now seen corresponding path program 3 times [2023-02-17 09:06:42,458 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 09:06:42,458 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [145574188] [2023-02-17 09:06:42,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 09:06:42,458 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 09:06:42,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 09:06:42,588 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2023-02-17 09:06:42,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 09:06:42,612 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 3 proven. 111 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-02-17 09:06:42,612 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 09:06:42,613 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [145574188] [2023-02-17 09:06:42,613 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [145574188] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 09:06:42,613 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [170068962] [2023-02-17 09:06:42,613 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-17 09:06:42,613 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 09:06:42,613 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 09:06:42,631 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-17 09:06:42,632 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-02-17 09:06:42,684 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2023-02-17 09:06:42,684 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-17 09:06:42,685 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 7 conjunts are in the unsatisfiable core [2023-02-17 09:06:42,686 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 09:06:42,719 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 87 proven. 0 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2023-02-17 09:06:42,720 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-17 09:06:42,720 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [170068962] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 09:06:42,720 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-02-17 09:06:42,720 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [15] total 19 [2023-02-17 09:06:42,720 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [789289894] [2023-02-17 09:06:42,721 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 09:06:42,721 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-17 09:06:42,721 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 09:06:42,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-17 09:06:42,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2023-02-17 09:06:42,722 INFO L87 Difference]: Start difference. First operand 20834 states and 70543 transitions. Second operand has 5 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-17 09:06:44,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 09:06:44,271 INFO L93 Difference]: Finished difference Result 20917 states and 71959 transitions. [2023-02-17 09:06:44,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-02-17 09:06:44,272 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 59 [2023-02-17 09:06:44,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 09:06:44,558 INFO L225 Difference]: With dead ends: 20917 [2023-02-17 09:06:44,559 INFO L226 Difference]: Without dead ends: 18654 [2023-02-17 09:06:44,602 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=357, Unknown=0, NotChecked=0, Total=420 [2023-02-17 09:06:44,603 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 32 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-17 09:06:44,603 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 50 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-17 09:06:44,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18654 states. [2023-02-17 09:06:46,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18654 to 18540. [2023-02-17 09:06:46,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18540 states, 11955 states have (on average 1.043245503973233) internal successors, (12472), 11949 states have internal predecessors, (12472), 3684 states have call successors, (3684), 332 states have call predecessors, (3684), 2897 states have return successors, (51628), 6258 states have call predecessors, (51628), 3673 states have call successors, (51628) [2023-02-17 09:06:47,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18540 states to 18540 states and 67784 transitions. [2023-02-17 09:06:47,252 INFO L78 Accepts]: Start accepts. Automaton has 18540 states and 67784 transitions. Word has length 59 [2023-02-17 09:06:47,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 09:06:47,252 INFO L495 AbstractCegarLoop]: Abstraction has 18540 states and 67784 transitions. [2023-02-17 09:06:47,252 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-17 09:06:47,252 INFO L276 IsEmpty]: Start isEmpty. Operand 18540 states and 67784 transitions. [2023-02-17 09:06:47,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2023-02-17 09:06:47,254 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 09:06:47,254 INFO L195 NwaCegarLoop]: trace histogram [9, 7, 5, 5, 5, 5, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 09:06:47,260 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2023-02-17 09:06:47,459 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 09:06:47,459 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ackermannErr6ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2023-02-17 09:06:47,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 09:06:47,460 INFO L85 PathProgramCache]: Analyzing trace with hash -1727955375, now seen corresponding path program 2 times [2023-02-17 09:06:47,460 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 09:06:47,460 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [103267833] [2023-02-17 09:06:47,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 09:06:47,460 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 09:06:47,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 09:06:47,536 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2023-02-17 09:06:47,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 09:06:47,569 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-02-17 09:06:47,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 09:06:47,598 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-02-17 09:06:47,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 09:06:47,616 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-02-17 09:06:47,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 09:06:47,637 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2023-02-17 09:06:47,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 09:06:47,658 INFO L134 CoverageAnalysis]: Checked inductivity of 163 backedges. 86 proven. 16 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2023-02-17 09:06:47,658 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 09:06:47,658 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [103267833] [2023-02-17 09:06:47,659 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [103267833] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 09:06:47,659 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1722379901] [2023-02-17 09:06:47,659 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-17 09:06:47,659 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 09:06:47,659 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 09:06:47,660 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-17 09:06:47,662 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-02-17 09:06:47,708 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-17 09:06:47,708 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-17 09:06:47,709 INFO L263 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 19 conjunts are in the unsatisfiable core [2023-02-17 09:06:47,710 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 09:06:47,778 INFO L134 CoverageAnalysis]: Checked inductivity of 163 backedges. 75 proven. 22 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2023-02-17 09:06:47,778 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 09:06:47,968 INFO L134 CoverageAnalysis]: Checked inductivity of 163 backedges. 94 proven. 8 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2023-02-17 09:06:47,968 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1722379901] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 09:06:47,968 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 09:06:47,968 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 16] total 32 [2023-02-17 09:06:47,968 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1149195771] [2023-02-17 09:06:47,968 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 09:06:47,969 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-02-17 09:06:47,969 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 09:06:47,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-02-17 09:06:47,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=930, Unknown=0, NotChecked=0, Total=1056 [2023-02-17 09:06:47,970 INFO L87 Difference]: Start difference. First operand 18540 states and 67784 transitions. Second operand has 33 states, 32 states have (on average 2.4375) internal successors, (78), 23 states have internal predecessors, (78), 7 states have call successors, (9), 5 states have call predecessors, (9), 8 states have return successors, (11), 10 states have call predecessors, (11), 3 states have call successors, (11) [2023-02-17 09:06:50,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 09:06:50,033 INFO L93 Difference]: Finished difference Result 28970 states and 107394 transitions. [2023-02-17 09:06:50,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-02-17 09:06:50,034 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 32 states have (on average 2.4375) internal successors, (78), 23 states have internal predecessors, (78), 7 states have call successors, (9), 5 states have call predecessors, (9), 8 states have return successors, (11), 10 states have call predecessors, (11), 3 states have call successors, (11) Word has length 80 [2023-02-17 09:06:50,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 09:06:50,104 INFO L225 Difference]: With dead ends: 28970 [2023-02-17 09:06:50,105 INFO L226 Difference]: Without dead ends: 10960 [2023-02-17 09:06:50,320 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 142 SyntacticMatches, 14 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 559 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=667, Invalid=2639, Unknown=0, NotChecked=0, Total=3306 [2023-02-17 09:06:50,321 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 226 mSDsluCounter, 347 mSDsCounter, 0 mSdLazyCounter, 768 mSolverCounterSat, 187 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 226 SdHoareTripleChecker+Valid, 384 SdHoareTripleChecker+Invalid, 955 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 187 IncrementalHoareTripleChecker+Valid, 768 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-17 09:06:50,321 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [226 Valid, 384 Invalid, 955 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [187 Valid, 768 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-17 09:06:50,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10960 states. [2023-02-17 09:06:51,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10960 to 10392. [2023-02-17 09:06:51,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10392 states, 7038 states have (on average 1.066780335322535) internal successors, (7508), 7204 states have internal predecessors, (7508), 2051 states have call successors, (2051), 356 states have call predecessors, (2051), 1299 states have return successors, (6727), 2831 states have call predecessors, (6727), 2043 states have call successors, (6727) [2023-02-17 09:06:51,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10392 states to 10392 states and 16286 transitions. [2023-02-17 09:06:51,194 INFO L78 Accepts]: Start accepts. Automaton has 10392 states and 16286 transitions. Word has length 80 [2023-02-17 09:06:51,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 09:06:51,195 INFO L495 AbstractCegarLoop]: Abstraction has 10392 states and 16286 transitions. [2023-02-17 09:06:51,195 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 32 states have (on average 2.4375) internal successors, (78), 23 states have internal predecessors, (78), 7 states have call successors, (9), 5 states have call predecessors, (9), 8 states have return successors, (11), 10 states have call predecessors, (11), 3 states have call successors, (11) [2023-02-17 09:06:51,195 INFO L276 IsEmpty]: Start isEmpty. Operand 10392 states and 16286 transitions. [2023-02-17 09:06:51,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2023-02-17 09:06:51,198 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 09:06:51,198 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 6, 6, 6, 5, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 09:06:51,208 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-02-17 09:06:51,403 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 09:06:51,403 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ackermannErr6ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2023-02-17 09:06:51,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 09:06:51,404 INFO L85 PathProgramCache]: Analyzing trace with hash 1935422832, now seen corresponding path program 3 times [2023-02-17 09:06:51,404 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 09:06:51,409 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1104798580] [2023-02-17 09:06:51,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 09:06:51,409 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 09:06:51,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 09:06:51,550 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-02-17 09:06:51,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 09:06:51,569 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-02-17 09:06:51,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 09:06:51,589 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 62 proven. 77 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-02-17 09:06:51,589 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 09:06:51,589 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1104798580] [2023-02-17 09:06:51,589 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1104798580] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 09:06:51,590 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1265929433] [2023-02-17 09:06:51,590 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-17 09:06:51,590 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 09:06:51,590 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 09:06:51,591 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-17 09:06:51,593 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-02-17 09:06:51,644 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2023-02-17 09:06:51,644 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-17 09:06:51,645 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 17 conjunts are in the unsatisfiable core [2023-02-17 09:06:51,646 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 09:06:51,796 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 60 proven. 79 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-02-17 09:06:51,796 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 09:06:51,965 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 64 proven. 75 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-02-17 09:06:51,965 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1265929433] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 09:06:51,966 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 09:06:51,966 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 33 [2023-02-17 09:06:51,966 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1882460348] [2023-02-17 09:06:51,966 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 09:06:51,966 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-02-17 09:06:51,966 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 09:06:51,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-02-17 09:06:51,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=949, Unknown=0, NotChecked=0, Total=1122 [2023-02-17 09:06:51,967 INFO L87 Difference]: Start difference. First operand 10392 states and 16286 transitions. Second operand has 34 states, 33 states have (on average 3.121212121212121) internal successors, (103), 22 states have internal predecessors, (103), 11 states have call successors, (13), 11 states have call predecessors, (13), 5 states have return successors, (5), 4 states have call predecessors, (5), 1 states have call successors, (5) [2023-02-17 09:06:52,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 09:06:52,635 INFO L93 Difference]: Finished difference Result 11147 states and 17428 transitions. [2023-02-17 09:06:52,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-02-17 09:06:52,635 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 3.121212121212121) internal successors, (103), 22 states have internal predecessors, (103), 11 states have call successors, (13), 11 states have call predecessors, (13), 5 states have return successors, (5), 4 states have call predecessors, (5), 1 states have call successors, (5) Word has length 68 [2023-02-17 09:06:52,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 09:06:52,670 INFO L225 Difference]: With dead ends: 11147 [2023-02-17 09:06:52,671 INFO L226 Difference]: Without dead ends: 11146 [2023-02-17 09:06:52,754 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 115 SyntacticMatches, 12 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 533 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=573, Invalid=1977, Unknown=0, NotChecked=0, Total=2550 [2023-02-17 09:06:52,754 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 247 mSDsluCounter, 217 mSDsCounter, 0 mSdLazyCounter, 474 mSolverCounterSat, 223 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 247 SdHoareTripleChecker+Valid, 248 SdHoareTripleChecker+Invalid, 697 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 223 IncrementalHoareTripleChecker+Valid, 474 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-17 09:06:52,754 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [247 Valid, 248 Invalid, 697 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [223 Valid, 474 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-17 09:06:52,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11146 states. [2023-02-17 09:06:53,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11146 to 10500. [2023-02-17 09:06:53,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10500 states, 7110 states have (on average 1.0635724331926864) internal successors, (7562), 7276 states have internal predecessors, (7562), 2051 states have call successors, (2051), 356 states have call predecessors, (2051), 1335 states have return successors, (6821), 2867 states have call predecessors, (6821), 2043 states have call successors, (6821) [2023-02-17 09:06:53,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10500 states to 10500 states and 16434 transitions. [2023-02-17 09:06:53,330 INFO L78 Accepts]: Start accepts. Automaton has 10500 states and 16434 transitions. Word has length 68 [2023-02-17 09:06:53,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 09:06:53,331 INFO L495 AbstractCegarLoop]: Abstraction has 10500 states and 16434 transitions. [2023-02-17 09:06:53,331 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 33 states have (on average 3.121212121212121) internal successors, (103), 22 states have internal predecessors, (103), 11 states have call successors, (13), 11 states have call predecessors, (13), 5 states have return successors, (5), 4 states have call predecessors, (5), 1 states have call successors, (5) [2023-02-17 09:06:53,331 INFO L276 IsEmpty]: Start isEmpty. Operand 10500 states and 16434 transitions. [2023-02-17 09:06:53,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2023-02-17 09:06:53,334 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 09:06:53,334 INFO L195 NwaCegarLoop]: trace histogram [10, 7, 6, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2023-02-17 09:06:53,347 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2023-02-17 09:06:53,538 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 09:06:53,538 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2023-02-17 09:06:53,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 09:06:53,539 INFO L85 PathProgramCache]: Analyzing trace with hash -2007669540, now seen corresponding path program 2 times [2023-02-17 09:06:53,539 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 09:06:53,540 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1589988458] [2023-02-17 09:06:53,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 09:06:53,540 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 09:06:53,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 09:06:53,583 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2023-02-17 09:06:53,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 09:06:53,606 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-02-17 09:06:53,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 09:06:53,641 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-02-17 09:06:53,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 09:06:53,673 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-02-17 09:06:53,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 09:06:53,747 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-02-17 09:06:53,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 09:06:53,750 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2023-02-17 09:06:53,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 09:06:53,752 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2023-02-17 09:06:53,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 09:06:53,754 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 103 proven. 24 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2023-02-17 09:06:53,754 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 09:06:53,754 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1589988458] [2023-02-17 09:06:53,755 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1589988458] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 09:06:53,755 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2083000267] [2023-02-17 09:06:53,755 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-17 09:06:53,755 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 09:06:53,755 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 09:06:53,769 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-17 09:06:53,797 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-02-17 09:06:53,855 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-17 09:06:53,855 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-17 09:06:53,856 INFO L263 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 7 conjunts are in the unsatisfiable core [2023-02-17 09:06:53,857 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 09:06:53,883 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 103 proven. 15 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2023-02-17 09:06:53,883 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 09:06:53,962 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 103 proven. 26 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2023-02-17 09:06:53,962 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2083000267] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 09:06:53,962 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 09:06:53,962 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 8] total 13 [2023-02-17 09:06:53,962 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1594785640] [2023-02-17 09:06:53,962 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 09:06:53,963 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-02-17 09:06:53,963 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 09:06:53,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-02-17 09:06:53,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2023-02-17 09:06:53,964 INFO L87 Difference]: Start difference. First operand 10500 states and 16434 transitions. Second operand has 13 states, 13 states have (on average 6.3076923076923075) internal successors, (82), 13 states have internal predecessors, (82), 12 states have call successors, (14), 2 states have call predecessors, (14), 7 states have return successors, (14), 6 states have call predecessors, (14), 11 states have call successors, (14) [2023-02-17 09:06:54,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 09:06:54,400 INFO L93 Difference]: Finished difference Result 21289 states and 37508 transitions. [2023-02-17 09:06:54,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-02-17 09:06:54,401 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 6.3076923076923075) internal successors, (82), 13 states have internal predecessors, (82), 12 states have call successors, (14), 2 states have call predecessors, (14), 7 states have return successors, (14), 6 states have call predecessors, (14), 11 states have call successors, (14) Word has length 89 [2023-02-17 09:06:54,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 09:06:54,441 INFO L225 Difference]: With dead ends: 21289 [2023-02-17 09:06:54,441 INFO L226 Difference]: Without dead ends: 11684 [2023-02-17 09:06:54,478 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 180 SyntacticMatches, 8 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=102, Invalid=204, Unknown=0, NotChecked=0, Total=306 [2023-02-17 09:06:54,479 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 82 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 134 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-17 09:06:54,479 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [84 Valid, 81 Invalid, 134 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-17 09:06:54,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11684 states. [2023-02-17 09:06:55,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11684 to 10494. [2023-02-17 09:06:55,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10494 states, 7107 states have (on average 1.0635992683270015) internal successors, (7559), 7273 states have internal predecessors, (7559), 2048 states have call successors, (2048), 356 states have call predecessors, (2048), 1335 states have return successors, (6741), 2864 states have call predecessors, (6741), 2013 states have call successors, (6741) [2023-02-17 09:06:55,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10494 states to 10494 states and 16348 transitions. [2023-02-17 09:06:55,158 INFO L78 Accepts]: Start accepts. Automaton has 10494 states and 16348 transitions. Word has length 89 [2023-02-17 09:06:55,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 09:06:55,159 INFO L495 AbstractCegarLoop]: Abstraction has 10494 states and 16348 transitions. [2023-02-17 09:06:55,159 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 6.3076923076923075) internal successors, (82), 13 states have internal predecessors, (82), 12 states have call successors, (14), 2 states have call predecessors, (14), 7 states have return successors, (14), 6 states have call predecessors, (14), 11 states have call successors, (14) [2023-02-17 09:06:55,159 INFO L276 IsEmpty]: Start isEmpty. Operand 10494 states and 16348 transitions. [2023-02-17 09:06:55,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2023-02-17 09:06:55,163 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 09:06:55,163 INFO L195 NwaCegarLoop]: trace histogram [11, 9, 6, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2023-02-17 09:06:55,179 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2023-02-17 09:06:55,367 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 09:06:55,368 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2023-02-17 09:06:55,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 09:06:55,368 INFO L85 PathProgramCache]: Analyzing trace with hash -1307053986, now seen corresponding path program 3 times [2023-02-17 09:06:55,368 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 09:06:55,368 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1043236720] [2023-02-17 09:06:55,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 09:06:55,369 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 09:06:55,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 09:06:55,457 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-02-17 09:06:55,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 09:06:55,506 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-02-17 09:06:55,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 09:06:55,533 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-02-17 09:06:55,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 09:06:55,560 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-02-17 09:06:55,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 09:06:55,587 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-02-17 09:06:55,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 09:06:55,602 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-02-17 09:06:55,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 09:06:55,610 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2023-02-17 09:06:55,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 09:06:55,613 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2023-02-17 09:06:55,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 09:06:55,618 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2023-02-17 09:06:55,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 09:06:55,620 INFO L134 CoverageAnalysis]: Checked inductivity of 266 backedges. 117 proven. 45 refuted. 0 times theorem prover too weak. 104 trivial. 0 not checked. [2023-02-17 09:06:55,620 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 09:06:55,620 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1043236720] [2023-02-17 09:06:55,620 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1043236720] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 09:06:55,620 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [863501991] [2023-02-17 09:06:55,620 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-17 09:06:55,620 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 09:06:55,620 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 09:06:55,621 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-17 09:06:55,637 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-02-17 09:06:55,706 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2023-02-17 09:06:55,706 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-17 09:06:55,707 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 12 conjunts are in the unsatisfiable core [2023-02-17 09:06:55,708 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 09:06:55,737 INFO L134 CoverageAnalysis]: Checked inductivity of 266 backedges. 153 proven. 26 refuted. 0 times theorem prover too weak. 87 trivial. 0 not checked. [2023-02-17 09:06:55,737 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 09:06:55,831 INFO L134 CoverageAnalysis]: Checked inductivity of 266 backedges. 123 proven. 57 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2023-02-17 09:06:55,832 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [863501991] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 09:06:55,832 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 09:06:55,832 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 11] total 16 [2023-02-17 09:06:55,832 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1162159301] [2023-02-17 09:06:55,832 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 09:06:55,833 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-02-17 09:06:55,833 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 09:06:55,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-02-17 09:06:55,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2023-02-17 09:06:55,834 INFO L87 Difference]: Start difference. First operand 10494 states and 16348 transitions. Second operand has 16 states, 16 states have (on average 5.1875) internal successors, (83), 16 states have internal predecessors, (83), 9 states have call successors, (14), 2 states have call predecessors, (14), 7 states have return successors, (17), 5 states have call predecessors, (17), 9 states have call successors, (17) [2023-02-17 09:06:56,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 09:06:56,559 INFO L93 Difference]: Finished difference Result 24308 states and 49208 transitions. [2023-02-17 09:06:56,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-02-17 09:06:56,559 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 5.1875) internal successors, (83), 16 states have internal predecessors, (83), 9 states have call successors, (14), 2 states have call predecessors, (14), 7 states have return successors, (17), 5 states have call predecessors, (17), 9 states have call successors, (17) Word has length 100 [2023-02-17 09:06:56,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 09:06:56,620 INFO L225 Difference]: With dead ends: 24308 [2023-02-17 09:06:56,620 INFO L226 Difference]: Without dead ends: 14737 [2023-02-17 09:06:56,667 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 197 SyntacticMatches, 18 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=113, Invalid=267, Unknown=0, NotChecked=0, Total=380 [2023-02-17 09:06:56,667 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 58 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 149 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 194 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 149 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-17 09:06:56,668 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [65 Valid, 119 Invalid, 194 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 149 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-17 09:06:56,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14737 states. [2023-02-17 09:06:57,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14737 to 14372. [2023-02-17 09:06:57,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14372 states, 9692 states have (on average 1.0522080066033843) internal successors, (10198), 9951 states have internal predecessors, (10198), 2881 states have call successors, (2881), 496 states have call predecessors, (2881), 1795 states have return successors, (9707), 3924 states have call predecessors, (9707), 2826 states have call successors, (9707) [2023-02-17 09:06:57,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14372 states to 14372 states and 22786 transitions. [2023-02-17 09:06:57,491 INFO L78 Accepts]: Start accepts. Automaton has 14372 states and 22786 transitions. Word has length 100 [2023-02-17 09:06:57,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 09:06:57,492 INFO L495 AbstractCegarLoop]: Abstraction has 14372 states and 22786 transitions. [2023-02-17 09:06:57,492 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 5.1875) internal successors, (83), 16 states have internal predecessors, (83), 9 states have call successors, (14), 2 states have call predecessors, (14), 7 states have return successors, (17), 5 states have call predecessors, (17), 9 states have call successors, (17) [2023-02-17 09:06:57,492 INFO L276 IsEmpty]: Start isEmpty. Operand 14372 states and 22786 transitions. [2023-02-17 09:06:57,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2023-02-17 09:06:57,496 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 09:06:57,497 INFO L195 NwaCegarLoop]: trace histogram [10, 8, 7, 7, 7, 6, 6, 6, 4, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 09:06:57,501 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2023-02-17 09:06:57,701 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2023-02-17 09:06:57,702 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ackermannErr6ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2023-02-17 09:06:57,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 09:06:57,702 INFO L85 PathProgramCache]: Analyzing trace with hash 1104252262, now seen corresponding path program 3 times [2023-02-17 09:06:57,702 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 09:06:57,702 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1544478921] [2023-02-17 09:06:57,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 09:06:57,702 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 09:06:57,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 09:06:57,810 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-02-17 09:06:57,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 09:06:57,840 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-02-17 09:06:57,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 09:06:57,939 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-02-17 09:06:57,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 09:06:57,965 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2023-02-17 09:06:57,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 09:06:57,991 INFO L134 CoverageAnalysis]: Checked inductivity of 227 backedges. 120 proven. 86 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-02-17 09:06:57,991 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 09:06:57,991 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1544478921] [2023-02-17 09:06:57,991 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1544478921] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 09:06:57,991 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [542120785] [2023-02-17 09:06:57,992 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-17 09:06:57,992 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 09:06:57,992 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 09:06:58,007 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-17 09:06:58,008 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-02-17 09:06:58,079 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2023-02-17 09:06:58,079 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-17 09:06:58,080 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 31 conjunts are in the unsatisfiable core [2023-02-17 09:06:58,081 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 09:06:58,177 INFO L134 CoverageAnalysis]: Checked inductivity of 227 backedges. 113 proven. 41 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2023-02-17 09:06:58,177 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 09:06:58,230 INFO L134 CoverageAnalysis]: Checked inductivity of 227 backedges. 142 proven. 13 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2023-02-17 09:06:58,231 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [542120785] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 09:06:58,231 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 09:06:58,231 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 7, 8] total 29 [2023-02-17 09:06:58,231 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2029355789] [2023-02-17 09:06:58,231 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 09:06:58,232 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-02-17 09:06:58,232 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 09:06:58,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-02-17 09:06:58,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=723, Unknown=0, NotChecked=0, Total=812 [2023-02-17 09:06:58,233 INFO L87 Difference]: Start difference. First operand 14372 states and 22786 transitions. Second operand has 29 states, 29 states have (on average 3.6551724137931036) internal successors, (106), 22 states have internal predecessors, (106), 11 states have call successors, (15), 7 states have call predecessors, (15), 7 states have return successors, (10), 9 states have call predecessors, (10), 4 states have call successors, (10) [2023-02-17 09:06:59,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 09:06:59,491 INFO L93 Difference]: Finished difference Result 25330 states and 43230 transitions. [2023-02-17 09:06:59,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2023-02-17 09:06:59,492 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 3.6551724137931036) internal successors, (106), 22 states have internal predecessors, (106), 11 states have call successors, (15), 7 states have call predecessors, (15), 7 states have return successors, (10), 9 states have call predecessors, (10), 4 states have call successors, (10) Word has length 87 [2023-02-17 09:06:59,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 09:06:59,549 INFO L225 Difference]: With dead ends: 25330 [2023-02-17 09:06:59,550 INFO L226 Difference]: Without dead ends: 13103 [2023-02-17 09:06:59,621 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 246 GetRequests, 177 SyntacticMatches, 4 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 827 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=983, Invalid=3439, Unknown=0, NotChecked=0, Total=4422 [2023-02-17 09:06:59,621 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 243 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 1059 mSolverCounterSat, 242 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 243 SdHoareTripleChecker+Valid, 153 SdHoareTripleChecker+Invalid, 1301 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 242 IncrementalHoareTripleChecker+Valid, 1059 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-02-17 09:06:59,622 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [243 Valid, 153 Invalid, 1301 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [242 Valid, 1059 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-02-17 09:06:59,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13103 states. [2023-02-17 09:07:00,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13103 to 11143. [2023-02-17 09:07:00,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11143 states, 7586 states have (on average 1.0460058001581862) internal successors, (7935), 7834 states have internal predecessors, (7935), 2175 states have call successors, (2175), 424 states have call predecessors, (2175), 1378 states have return successors, (5289), 2884 states have call predecessors, (5289), 2141 states have call successors, (5289) [2023-02-17 09:07:00,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11143 states to 11143 states and 15399 transitions. [2023-02-17 09:07:00,324 INFO L78 Accepts]: Start accepts. Automaton has 11143 states and 15399 transitions. Word has length 87 [2023-02-17 09:07:00,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 09:07:00,326 INFO L495 AbstractCegarLoop]: Abstraction has 11143 states and 15399 transitions. [2023-02-17 09:07:00,326 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 3.6551724137931036) internal successors, (106), 22 states have internal predecessors, (106), 11 states have call successors, (15), 7 states have call predecessors, (15), 7 states have return successors, (10), 9 states have call predecessors, (10), 4 states have call successors, (10) [2023-02-17 09:07:00,326 INFO L276 IsEmpty]: Start isEmpty. Operand 11143 states and 15399 transitions. [2023-02-17 09:07:00,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2023-02-17 09:07:00,330 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 09:07:00,330 INFO L195 NwaCegarLoop]: trace histogram [10, 8, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 09:07:00,334 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2023-02-17 09:07:00,534 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2023-02-17 09:07:00,535 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2023-02-17 09:07:00,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 09:07:00,535 INFO L85 PathProgramCache]: Analyzing trace with hash 1765664819, now seen corresponding path program 4 times [2023-02-17 09:07:00,535 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 09:07:00,536 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1998142266] [2023-02-17 09:07:00,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 09:07:00,536 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 09:07:00,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 09:07:00,647 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-02-17 09:07:00,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 09:07:00,730 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-02-17 09:07:00,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 09:07:00,777 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-02-17 09:07:00,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 09:07:00,809 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-02-17 09:07:00,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 09:07:00,828 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-02-17 09:07:00,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 09:07:00,848 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2023-02-17 09:07:00,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 09:07:00,870 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2023-02-17 09:07:00,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 09:07:00,877 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2023-02-17 09:07:00,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 09:07:00,884 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 51 proven. 69 refuted. 0 times theorem prover too weak. 101 trivial. 0 not checked. [2023-02-17 09:07:00,885 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 09:07:00,885 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1998142266] [2023-02-17 09:07:00,885 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1998142266] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 09:07:00,885 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1138562902] [2023-02-17 09:07:00,885 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-17 09:07:00,885 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 09:07:00,885 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 09:07:00,886 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-17 09:07:00,888 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-02-17 09:07:00,962 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-17 09:07:00,962 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-17 09:07:00,963 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 27 conjunts are in the unsatisfiable core [2023-02-17 09:07:00,964 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 09:07:01,042 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 34 proven. 71 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2023-02-17 09:07:01,042 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 09:07:01,429 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 42 proven. 93 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2023-02-17 09:07:01,429 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1138562902] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 09:07:01,429 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 09:07:01,429 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17, 23] total 42 [2023-02-17 09:07:01,430 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1563957302] [2023-02-17 09:07:01,430 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 09:07:01,430 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2023-02-17 09:07:01,430 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 09:07:01,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2023-02-17 09:07:01,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=207, Invalid=1599, Unknown=0, NotChecked=0, Total=1806 [2023-02-17 09:07:01,431 INFO L87 Difference]: Start difference. First operand 11143 states and 15399 transitions. Second operand has 43 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 33 states have internal predecessors, (80), 9 states have call successors, (11), 3 states have call predecessors, (11), 14 states have return successors, (17), 16 states have call predecessors, (17), 7 states have call successors, (17) [2023-02-17 09:07:04,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 09:07:04,796 INFO L93 Difference]: Finished difference Result 34681 states and 55092 transitions. [2023-02-17 09:07:04,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 143 states. [2023-02-17 09:07:04,796 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 33 states have internal predecessors, (80), 9 states have call successors, (11), 3 states have call predecessors, (11), 14 states have return successors, (17), 16 states have call predecessors, (17), 7 states have call successors, (17) Word has length 91 [2023-02-17 09:07:04,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 09:07:04,954 INFO L225 Difference]: With dead ends: 34681 [2023-02-17 09:07:04,955 INFO L226 Difference]: Without dead ends: 33579 [2023-02-17 09:07:04,993 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 356 GetRequests, 165 SyntacticMatches, 12 SemanticMatches, 179 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12216 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=5454, Invalid=27126, Unknown=0, NotChecked=0, Total=32580 [2023-02-17 09:07:04,994 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 331 mSDsluCounter, 265 mSDsCounter, 0 mSdLazyCounter, 1332 mSolverCounterSat, 742 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 342 SdHoareTripleChecker+Valid, 287 SdHoareTripleChecker+Invalid, 2074 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 742 IncrementalHoareTripleChecker+Valid, 1332 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-02-17 09:07:04,994 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [342 Valid, 287 Invalid, 2074 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [742 Valid, 1332 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-02-17 09:07:05,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33579 states. [2023-02-17 09:07:06,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33579 to 21093. [2023-02-17 09:07:06,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21093 states, 13678 states have (on average 1.0274162889311302) internal successors, (14053), 13909 states have internal predecessors, (14053), 4366 states have call successors, (4366), 532 states have call predecessors, (4366), 3045 states have return successors, (14390), 6651 states have call predecessors, (14390), 4312 states have call successors, (14390) [2023-02-17 09:07:06,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21093 states to 21093 states and 32809 transitions. [2023-02-17 09:07:06,594 INFO L78 Accepts]: Start accepts. Automaton has 21093 states and 32809 transitions. Word has length 91 [2023-02-17 09:07:06,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 09:07:06,595 INFO L495 AbstractCegarLoop]: Abstraction has 21093 states and 32809 transitions. [2023-02-17 09:07:06,595 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 33 states have internal predecessors, (80), 9 states have call successors, (11), 3 states have call predecessors, (11), 14 states have return successors, (17), 16 states have call predecessors, (17), 7 states have call successors, (17) [2023-02-17 09:07:06,595 INFO L276 IsEmpty]: Start isEmpty. Operand 21093 states and 32809 transitions. [2023-02-17 09:07:06,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2023-02-17 09:07:06,601 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 09:07:06,601 INFO L195 NwaCegarLoop]: trace histogram [15, 15, 15, 15, 15, 14, 14, 14, 1, 1, 1, 1, 1, 1] [2023-02-17 09:07:06,605 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2023-02-17 09:07:06,805 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2023-02-17 09:07:06,806 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ackermannErr6ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2023-02-17 09:07:06,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 09:07:06,807 INFO L85 PathProgramCache]: Analyzing trace with hash 1934326320, now seen corresponding path program 3 times [2023-02-17 09:07:06,807 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 09:07:06,807 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [806597557] [2023-02-17 09:07:06,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 09:07:06,807 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 09:07:06,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 09:07:07,217 INFO L134 CoverageAnalysis]: Checked inductivity of 812 backedges. 0 proven. 812 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 09:07:07,217 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 09:07:07,217 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [806597557] [2023-02-17 09:07:07,217 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [806597557] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 09:07:07,218 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [529643587] [2023-02-17 09:07:07,218 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-17 09:07:07,218 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 09:07:07,218 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 09:07:07,219 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-17 09:07:07,222 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-02-17 09:07:07,339 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2023-02-17 09:07:07,339 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-17 09:07:07,341 INFO L263 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 32 conjunts are in the unsatisfiable core [2023-02-17 09:07:07,342 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 09:07:07,615 INFO L134 CoverageAnalysis]: Checked inductivity of 812 backedges. 0 proven. 812 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 09:07:07,615 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 09:07:08,159 INFO L134 CoverageAnalysis]: Checked inductivity of 812 backedges. 0 proven. 812 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 09:07:08,159 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [529643587] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 09:07:08,159 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 09:07:08,160 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32, 32] total 63 [2023-02-17 09:07:08,160 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1879006866] [2023-02-17 09:07:08,160 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 09:07:08,161 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2023-02-17 09:07:08,161 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 09:07:08,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2023-02-17 09:07:08,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=996, Invalid=3036, Unknown=0, NotChecked=0, Total=4032 [2023-02-17 09:07:08,163 INFO L87 Difference]: Start difference. First operand 21093 states and 32809 transitions. Second operand has 64 states, 61 states have (on average 3.4918032786885247) internal successors, (213), 34 states have internal predecessors, (213), 30 states have call successors, (30), 30 states have call predecessors, (30), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)