./Ultimate.py --spec ../sv-benchmarks/c/properties/no-overflow.prp --file ../sv-benchmarks/c/recursive/Ackermann04.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version 3dbbec33 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/Ackermann04.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 85f83c4bcdce9397140788b204098e14e4fa25f5b66f064340f4aaa544fbb462 --- Real Ultimate output --- This is Ultimate 0.2.2-?-3dbbec3 [2023-02-14 14:07:38,504 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-02-14 14:07:38,506 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-02-14 14:07:38,543 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-02-14 14:07:38,543 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-02-14 14:07:38,546 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-02-14 14:07:38,548 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-02-14 14:07:38,550 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-02-14 14:07:38,551 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-02-14 14:07:38,556 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-02-14 14:07:38,557 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-02-14 14:07:38,559 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-02-14 14:07:38,559 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-02-14 14:07:38,561 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-02-14 14:07:38,562 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-02-14 14:07:38,564 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-02-14 14:07:38,565 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-02-14 14:07:38,566 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-02-14 14:07:38,567 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-02-14 14:07:38,572 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-02-14 14:07:38,573 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-02-14 14:07:38,574 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-02-14 14:07:38,575 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-02-14 14:07:38,575 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-02-14 14:07:38,583 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-02-14 14:07:38,583 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-02-14 14:07:38,584 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-02-14 14:07:38,585 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-02-14 14:07:38,585 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-02-14 14:07:38,586 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-02-14 14:07:38,586 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-02-14 14:07:38,587 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-02-14 14:07:38,588 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-02-14 14:07:38,589 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-02-14 14:07:38,590 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-02-14 14:07:38,590 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-02-14 14:07:38,590 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-02-14 14:07:38,590 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-02-14 14:07:38,591 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-02-14 14:07:38,591 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-02-14 14:07:38,592 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-02-14 14:07:38,593 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Overflow-32bit-Automizer_Default.epf [2023-02-14 14:07:38,624 INFO L113 SettingsManager]: Loading preferences was successful [2023-02-14 14:07:38,624 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-02-14 14:07:38,625 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-02-14 14:07:38,625 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-02-14 14:07:38,626 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-02-14 14:07:38,626 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-02-14 14:07:38,626 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-02-14 14:07:38,627 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-02-14 14:07:38,627 INFO L138 SettingsManager]: * Use SBE=true [2023-02-14 14:07:38,627 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-02-14 14:07:38,628 INFO L138 SettingsManager]: * sizeof long=4 [2023-02-14 14:07:38,628 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-02-14 14:07:38,628 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-02-14 14:07:38,628 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-02-14 14:07:38,628 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-02-14 14:07:38,629 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-02-14 14:07:38,629 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-02-14 14:07:38,629 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-02-14 14:07:38,629 INFO L138 SettingsManager]: * Check absence of signed integer overflows=true [2023-02-14 14:07:38,629 INFO L138 SettingsManager]: * sizeof long double=12 [2023-02-14 14:07:38,629 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-02-14 14:07:38,630 INFO L138 SettingsManager]: * Use constant arrays=true [2023-02-14 14:07:38,630 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-02-14 14:07:38,630 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-02-14 14:07:38,630 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-02-14 14:07:38,630 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-02-14 14:07:38,631 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-14 14:07:38,631 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-02-14 14:07:38,631 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-02-14 14:07:38,631 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-02-14 14:07:38,631 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-02-14 14:07:38,632 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-02-14 14:07:38,632 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-02-14 14:07:38,632 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-02-14 14:07:38,632 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-02-14 14:07:38,638 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-02-14 14:07:38,638 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-02-14 14:07:38,638 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 85f83c4bcdce9397140788b204098e14e4fa25f5b66f064340f4aaa544fbb462 [2023-02-14 14:07:38,870 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-02-14 14:07:38,895 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-02-14 14:07:38,898 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-02-14 14:07:38,899 INFO L271 PluginConnector]: Initializing CDTParser... [2023-02-14 14:07:38,899 INFO L275 PluginConnector]: CDTParser initialized [2023-02-14 14:07:38,900 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/recursive/Ackermann04.c [2023-02-14 14:07:40,008 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-02-14 14:07:40,184 INFO L351 CDTParser]: Found 1 translation units. [2023-02-14 14:07:40,185 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursive/Ackermann04.c [2023-02-14 14:07:40,190 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6be97dc4f/66098a28efc54b269f2e91309d6f6f16/FLAGc75b282ab [2023-02-14 14:07:40,207 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6be97dc4f/66098a28efc54b269f2e91309d6f6f16 [2023-02-14 14:07:40,209 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-02-14 14:07:40,210 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-02-14 14:07:40,213 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-02-14 14:07:40,213 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-02-14 14:07:40,216 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-02-14 14:07:40,216 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.02 02:07:40" (1/1) ... [2023-02-14 14:07:40,218 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@65ff1f72 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 02:07:40, skipping insertion in model container [2023-02-14 14:07:40,218 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.02 02:07:40" (1/1) ... [2023-02-14 14:07:40,224 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-02-14 14:07:40,236 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-02-14 14:07:40,372 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/Ackermann04.c[1166,1179] [2023-02-14 14:07:40,374 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-14 14:07:40,384 INFO L203 MainTranslator]: Completed pre-run [2023-02-14 14:07:40,396 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/Ackermann04.c[1166,1179] [2023-02-14 14:07:40,396 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-14 14:07:40,407 INFO L208 MainTranslator]: Completed translation [2023-02-14 14:07:40,407 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 02:07:40 WrapperNode [2023-02-14 14:07:40,407 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-02-14 14:07:40,408 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-02-14 14:07:40,409 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-02-14 14:07:40,409 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-02-14 14:07:40,414 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 02:07:40" (1/1) ... [2023-02-14 14:07:40,420 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 02:07:40" (1/1) ... [2023-02-14 14:07:40,430 INFO L138 Inliner]: procedures = 13, calls = 11, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 32 [2023-02-14 14:07:40,431 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-02-14 14:07:40,431 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-02-14 14:07:40,431 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-02-14 14:07:40,431 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-02-14 14:07:40,436 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 02:07:40" (1/1) ... [2023-02-14 14:07:40,437 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 02:07:40" (1/1) ... [2023-02-14 14:07:40,438 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 02:07:40" (1/1) ... [2023-02-14 14:07:40,438 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 02:07:40" (1/1) ... [2023-02-14 14:07:40,440 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 02:07:40" (1/1) ... [2023-02-14 14:07:40,442 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 02:07:40" (1/1) ... [2023-02-14 14:07:40,443 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 02:07:40" (1/1) ... [2023-02-14 14:07:40,443 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 02:07:40" (1/1) ... [2023-02-14 14:07:40,444 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-02-14 14:07:40,445 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-02-14 14:07:40,445 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-02-14 14:07:40,445 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-02-14 14:07:40,446 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 02:07:40" (1/1) ... [2023-02-14 14:07:40,451 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-14 14:07:40,461 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 14:07:40,478 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) [2023-02-14 14:07:40,496 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 [2023-02-14 14:07:40,514 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-02-14 14:07:40,514 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-02-14 14:07:40,516 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-02-14 14:07:40,517 INFO L130 BoogieDeclarations]: Found specification of procedure ackermann [2023-02-14 14:07:40,517 INFO L138 BoogieDeclarations]: Found implementation of procedure ackermann [2023-02-14 14:07:40,517 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-02-14 14:07:40,564 INFO L235 CfgBuilder]: Building ICFG [2023-02-14 14:07:40,565 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2023-02-14 14:07:40,697 INFO L276 CfgBuilder]: Performing block encoding [2023-02-14 14:07:40,702 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-02-14 14:07:40,702 INFO L300 CfgBuilder]: Removed 0 assume(true) statements. [2023-02-14 14:07:40,703 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.02 02:07:40 BoogieIcfgContainer [2023-02-14 14:07:40,703 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-02-14 14:07:40,705 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-02-14 14:07:40,705 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-02-14 14:07:40,707 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-02-14 14:07:40,708 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.02 02:07:40" (1/3) ... [2023-02-14 14:07:40,708 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2dfb0d0a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.02 02:07:40, skipping insertion in model container [2023-02-14 14:07:40,708 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 02:07:40" (2/3) ... [2023-02-14 14:07:40,711 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2dfb0d0a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.02 02:07:40, skipping insertion in model container [2023-02-14 14:07:40,714 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.02 02:07:40" (3/3) ... [2023-02-14 14:07:40,715 INFO L112 eAbstractionObserver]: Analyzing ICFG Ackermann04.c [2023-02-14 14:07:40,731 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-02-14 14:07:40,732 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 8 error locations. [2023-02-14 14:07:40,788 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-02-14 14:07:40,793 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;@1d9cc2ee, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-02-14 14:07:40,794 INFO L358 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2023-02-14 14:07:40,797 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) [2023-02-14 14:07:40,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-02-14 14:07:40,803 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 14:07:40,803 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 14:07:40,804 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2023-02-14 14:07:40,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 14:07:40,808 INFO L85 PathProgramCache]: Analyzing trace with hash 180762217, now seen corresponding path program 1 times [2023-02-14 14:07:40,817 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 14:07:40,817 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [51144429] [2023-02-14 14:07:40,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 14:07:40,818 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 14:07:40,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 14:07:41,104 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 14:07:41,104 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 14:07:41,104 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [51144429] [2023-02-14 14:07:41,105 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [51144429] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-14 14:07:41,105 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-14 14:07:41,105 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-14 14:07:41,107 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1005554413] [2023-02-14 14:07:41,107 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 14:07:41,110 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-14 14:07:41,111 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 14:07:41,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-14 14:07:41,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-02-14 14:07:41,139 INFO L87 Difference]: Start difference. First operand has 38 states, 24 states have (on average 1.5416666666666667) internal successors, (37), 32 states have internal predecessors, (37), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 5 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 14:07:41,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 14:07:41,257 INFO L93 Difference]: Finished difference Result 73 states and 85 transitions. [2023-02-14 14:07:41,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-14 14:07:41,259 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2023-02-14 14:07:41,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 14:07:41,266 INFO L225 Difference]: With dead ends: 73 [2023-02-14 14:07:41,266 INFO L226 Difference]: Without dead ends: 60 [2023-02-14 14:07:41,269 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 [2023-02-14 14:07:41,271 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 61 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-14 14:07:41,272 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [66 Valid, 107 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-14 14:07:41,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2023-02-14 14:07:41,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 51. [2023-02-14 14:07:41,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 34 states have (on average 1.5588235294117647) internal successors, (53), 42 states have internal predecessors, (53), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-02-14 14:07:41,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 66 transitions. [2023-02-14 14:07:41,309 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 66 transitions. Word has length 8 [2023-02-14 14:07:41,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 14:07:41,309 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 66 transitions. [2023-02-14 14:07:41,309 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 14:07:41,310 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 66 transitions. [2023-02-14 14:07:41,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2023-02-14 14:07:41,310 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 14:07:41,310 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 14:07:41,311 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-02-14 14:07:41,311 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2023-02-14 14:07:41,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 14:07:41,312 INFO L85 PathProgramCache]: Analyzing trace with hash 1308666490, now seen corresponding path program 1 times [2023-02-14 14:07:41,312 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 14:07:41,312 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [699308569] [2023-02-14 14:07:41,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 14:07:41,313 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 14:07:41,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 14:07:41,390 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 14:07:41,390 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 14:07:41,390 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [699308569] [2023-02-14 14:07:41,390 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [699308569] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-14 14:07:41,391 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-14 14:07:41,391 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-14 14:07:41,391 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1759306820] [2023-02-14 14:07:41,391 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 14:07:41,392 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-14 14:07:41,392 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 14:07:41,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-14 14:07:41,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-02-14 14:07:41,393 INFO L87 Difference]: Start difference. First operand 51 states and 66 transitions. Second operand has 5 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 14:07:41,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 14:07:41,485 INFO L93 Difference]: Finished difference Result 101 states and 139 transitions. [2023-02-14 14:07:41,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-14 14:07:41,486 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 [2023-02-14 14:07:41,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 14:07:41,488 INFO L225 Difference]: With dead ends: 101 [2023-02-14 14:07:41,488 INFO L226 Difference]: Without dead ends: 95 [2023-02-14 14:07:41,489 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 [2023-02-14 14:07:41,490 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 48 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-14 14:07:41,491 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 89 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-14 14:07:41,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2023-02-14 14:07:41,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 85. [2023-02-14 14:07:41,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 61 states have (on average 1.540983606557377) internal successors, (94), 70 states have internal predecessors, (94), 13 states have call successors, (13), 4 states have call predecessors, (13), 3 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2023-02-14 14:07:41,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 117 transitions. [2023-02-14 14:07:41,517 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 117 transitions. Word has length 9 [2023-02-14 14:07:41,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 14:07:41,517 INFO L495 AbstractCegarLoop]: Abstraction has 85 states and 117 transitions. [2023-02-14 14:07:41,517 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) [2023-02-14 14:07:41,518 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 117 transitions. [2023-02-14 14:07:41,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2023-02-14 14:07:41,518 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 14:07:41,518 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 14:07:41,518 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-02-14 14:07:41,519 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2023-02-14 14:07:41,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 14:07:41,519 INFO L85 PathProgramCache]: Analyzing trace with hash 1308661493, now seen corresponding path program 1 times [2023-02-14 14:07:41,520 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 14:07:41,520 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1670377729] [2023-02-14 14:07:41,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 14:07:41,520 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 14:07:41,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 14:07:41,632 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 14:07:41,633 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 14:07:41,633 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1670377729] [2023-02-14 14:07:41,633 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1670377729] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-14 14:07:41,634 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-14 14:07:41,634 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-14 14:07:41,635 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [684583460] [2023-02-14 14:07:41,635 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 14:07:41,636 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-14 14:07:41,636 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 14:07:41,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-14 14:07:41,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-02-14 14:07:41,638 INFO L87 Difference]: Start difference. First operand 85 states and 117 transitions. Second operand has 5 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 14:07:41,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 14:07:41,707 INFO L93 Difference]: Finished difference Result 114 states and 154 transitions. [2023-02-14 14:07:41,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-14 14:07:41,708 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 [2023-02-14 14:07:41,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 14:07:41,710 INFO L225 Difference]: With dead ends: 114 [2023-02-14 14:07:41,710 INFO L226 Difference]: Without dead ends: 110 [2023-02-14 14:07:41,711 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-02-14 14:07:41,712 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 [2023-02-14 14:07:41,712 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] [2023-02-14 14:07:41,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2023-02-14 14:07:41,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 102. [2023-02-14 14:07:41,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 74 states have (on average 1.472972972972973) internal successors, (109), 83 states have internal predecessors, (109), 16 states have call successors, (16), 5 states have call predecessors, (16), 4 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2023-02-14 14:07:41,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 138 transitions. [2023-02-14 14:07:41,744 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 138 transitions. Word has length 9 [2023-02-14 14:07:41,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 14:07:41,744 INFO L495 AbstractCegarLoop]: Abstraction has 102 states and 138 transitions. [2023-02-14 14:07:41,745 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) [2023-02-14 14:07:41,745 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 138 transitions. [2023-02-14 14:07:41,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-02-14 14:07:41,745 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 14:07:41,745 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 14:07:41,746 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-02-14 14:07:41,746 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ackermannErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2023-02-14 14:07:41,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 14:07:41,747 INFO L85 PathProgramCache]: Analyzing trace with hash 1913955596, now seen corresponding path program 1 times [2023-02-14 14:07:41,747 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 14:07:41,747 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1682319409] [2023-02-14 14:07:41,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 14:07:41,748 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 14:07:41,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 14:07:41,789 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 14:07:41,789 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 14:07:41,789 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1682319409] [2023-02-14 14:07:41,790 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1682319409] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-14 14:07:41,790 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-14 14:07:41,790 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-14 14:07:41,790 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [459790490] [2023-02-14 14:07:41,790 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 14:07:41,791 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-14 14:07:41,791 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 14:07:41,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-14 14:07:41,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-02-14 14:07:41,792 INFO L87 Difference]: Start difference. First operand 102 states and 138 transitions. Second operand has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 14:07:41,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 14:07:41,844 INFO L93 Difference]: Finished difference Result 102 states and 138 transitions. [2023-02-14 14:07:41,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-02-14 14:07:41,845 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 [2023-02-14 14:07:41,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 14:07:41,854 INFO L225 Difference]: With dead ends: 102 [2023-02-14 14:07:41,854 INFO L226 Difference]: Without dead ends: 100 [2023-02-14 14:07:41,854 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 [2023-02-14 14:07:41,856 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 [2023-02-14 14:07:41,856 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] [2023-02-14 14:07:41,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2023-02-14 14:07:41,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 100. [2023-02-14 14:07:41,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 74 states have (on average 1.337837837837838) internal successors, (99), 81 states have internal predecessors, (99), 16 states have call successors, (16), 5 states have call predecessors, (16), 4 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2023-02-14 14:07:41,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 128 transitions. [2023-02-14 14:07:41,872 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 128 transitions. Word has length 10 [2023-02-14 14:07:41,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 14:07:41,872 INFO L495 AbstractCegarLoop]: Abstraction has 100 states and 128 transitions. [2023-02-14 14:07:41,872 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) [2023-02-14 14:07:41,872 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 128 transitions. [2023-02-14 14:07:41,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-02-14 14:07:41,873 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 14:07:41,873 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 14:07:41,873 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-02-14 14:07:41,874 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ackermannErr6ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2023-02-14 14:07:41,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 14:07:41,874 INFO L85 PathProgramCache]: Analyzing trace with hash -796703108, now seen corresponding path program 1 times [2023-02-14 14:07:41,875 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 14:07:41,875 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1259104595] [2023-02-14 14:07:41,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 14:07:41,875 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 14:07:41,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 14:07:41,929 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 14:07:41,929 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 14:07:41,929 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1259104595] [2023-02-14 14:07:41,929 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1259104595] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-14 14:07:41,930 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-14 14:07:41,930 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-14 14:07:41,930 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1808010351] [2023-02-14 14:07:41,930 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 14:07:41,931 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-14 14:07:41,931 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 14:07:41,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-14 14:07:41,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-02-14 14:07:41,932 INFO L87 Difference]: Start difference. First operand 100 states and 128 transitions. Second operand has 5 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 14:07:41,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 14:07:41,984 INFO L93 Difference]: Finished difference Result 109 states and 140 transitions. [2023-02-14 14:07:41,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-14 14:07:41,985 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2023-02-14 14:07:41,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 14:07:41,986 INFO L225 Difference]: With dead ends: 109 [2023-02-14 14:07:41,986 INFO L226 Difference]: Without dead ends: 108 [2023-02-14 14:07:41,987 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-02-14 14:07:41,989 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 38 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-14 14:07:41,990 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 92 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-14 14:07:41,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2023-02-14 14:07:42,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 100. [2023-02-14 14:07:42,005 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) [2023-02-14 14:07:42,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 126 transitions. [2023-02-14 14:07:42,007 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 126 transitions. Word has length 11 [2023-02-14 14:07:42,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 14:07:42,007 INFO L495 AbstractCegarLoop]: Abstraction has 100 states and 126 transitions. [2023-02-14 14:07:42,008 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 14:07:42,008 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 126 transitions. [2023-02-14 14:07:42,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-02-14 14:07:42,008 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 14:07:42,009 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 14:07:42,009 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-02-14 14:07:42,009 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2023-02-14 14:07:42,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 14:07:42,010 INFO L85 PathProgramCache]: Analyzing trace with hash 1669645175, now seen corresponding path program 1 times [2023-02-14 14:07:42,010 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 14:07:42,010 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [313054099] [2023-02-14 14:07:42,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 14:07:42,011 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 14:07:42,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 14:07:42,048 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 14:07:42,049 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 14:07:42,049 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [313054099] [2023-02-14 14:07:42,049 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [313054099] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-14 14:07:42,051 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-14 14:07:42,051 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-14 14:07:42,051 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1013707822] [2023-02-14 14:07:42,052 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 14:07:42,052 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-14 14:07:42,052 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 14:07:42,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-14 14:07:42,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-14 14:07:42,053 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) [2023-02-14 14:07:42,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 14:07:42,091 INFO L93 Difference]: Finished difference Result 168 states and 221 transitions. [2023-02-14 14:07:42,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-14 14:07:42,092 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 [2023-02-14 14:07:42,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 14:07:42,092 INFO L225 Difference]: With dead ends: 168 [2023-02-14 14:07:42,092 INFO L226 Difference]: Without dead ends: 97 [2023-02-14 14:07:42,093 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 [2023-02-14 14:07:42,094 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 [2023-02-14 14:07:42,094 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] [2023-02-14 14:07:42,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2023-02-14 14:07:42,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 96. [2023-02-14 14:07:42,101 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) [2023-02-14 14:07:42,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 119 transitions. [2023-02-14 14:07:42,102 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 119 transitions. Word has length 15 [2023-02-14 14:07:42,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 14:07:42,103 INFO L495 AbstractCegarLoop]: Abstraction has 96 states and 119 transitions. [2023-02-14 14:07:42,103 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) [2023-02-14 14:07:42,103 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 119 transitions. [2023-02-14 14:07:42,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-02-14 14:07:42,103 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 14:07:42,103 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 14:07:42,104 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-02-14 14:07:42,104 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ackermannErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2023-02-14 14:07:42,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 14:07:42,104 INFO L85 PathProgramCache]: Analyzing trace with hash 1669645399, now seen corresponding path program 1 times [2023-02-14 14:07:42,104 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 14:07:42,104 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [975595072] [2023-02-14 14:07:42,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 14:07:42,105 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 14:07:42,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 14:07:42,166 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 14:07:42,167 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 14:07:42,167 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [975595072] [2023-02-14 14:07:42,167 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [975595072] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 14:07:42,167 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1405385174] [2023-02-14 14:07:42,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 14:07:42,168 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 14:07:42,168 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 14:07:42,171 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) [2023-02-14 14:07:42,173 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-02-14 14:07:42,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 14:07:42,262 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 6 conjunts are in the unsatisfiable core [2023-02-14 14:07:42,267 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 14:07:42,326 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 14:07:42,327 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 14:07:42,395 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 14:07:42,396 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1405385174] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 14:07:42,396 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 14:07:42,396 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 11 [2023-02-14 14:07:42,396 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1506384573] [2023-02-14 14:07:42,396 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 14:07:42,399 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-02-14 14:07:42,399 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 14:07:42,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-02-14 14:07:42,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2023-02-14 14:07:42,401 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) [2023-02-14 14:07:42,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 14:07:42,673 INFO L93 Difference]: Finished difference Result 274 states and 356 transitions. [2023-02-14 14:07:42,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-02-14 14:07:42,673 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 [2023-02-14 14:07:42,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 14:07:42,680 INFO L225 Difference]: With dead ends: 274 [2023-02-14 14:07:42,680 INFO L226 Difference]: Without dead ends: 272 [2023-02-14 14:07:42,683 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=104, Invalid=238, Unknown=0, NotChecked=0, Total=342 [2023-02-14 14:07:42,687 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 249 mSDsluCounter, 134 mSDsCounter, 0 mSdLazyCounter, 148 mSolverCounterSat, 97 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 255 SdHoareTripleChecker+Valid, 163 SdHoareTripleChecker+Invalid, 245 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 148 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-14 14:07:42,688 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [255 Valid, 163 Invalid, 245 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 148 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-14 14:07:42,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2023-02-14 14:07:42,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 236. [2023-02-14 14:07:42,739 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) [2023-02-14 14:07:42,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 299 transitions. [2023-02-14 14:07:42,746 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 299 transitions. Word has length 15 [2023-02-14 14:07:42,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 14:07:42,746 INFO L495 AbstractCegarLoop]: Abstraction has 236 states and 299 transitions. [2023-02-14 14:07:42,747 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) [2023-02-14 14:07:42,747 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 299 transitions. [2023-02-14 14:07:42,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-02-14 14:07:42,749 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 14:07:42,749 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 14:07:42,760 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-02-14 14:07:42,955 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 14:07:42,956 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2023-02-14 14:07:42,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 14:07:42,957 INFO L85 PathProgramCache]: Analyzing trace with hash 1422985811, now seen corresponding path program 1 times [2023-02-14 14:07:42,957 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 14:07:42,957 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [145989486] [2023-02-14 14:07:42,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 14:07:42,957 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 14:07:42,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 14:07:43,050 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 14:07:43,050 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 14:07:43,051 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [145989486] [2023-02-14 14:07:43,051 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [145989486] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 14:07:43,051 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1409871036] [2023-02-14 14:07:43,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 14:07:43,052 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 14:07:43,054 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 14:07:43,057 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) [2023-02-14 14:07:43,065 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-02-14 14:07:43,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 14:07:43,093 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 4 conjunts are in the unsatisfiable core [2023-02-14 14:07:43,094 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 14:07:43,155 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 14:07:43,155 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-14 14:07:43,155 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1409871036] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-14 14:07:43,156 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-02-14 14:07:43,156 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 9 [2023-02-14 14:07:43,156 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [465790847] [2023-02-14 14:07:43,156 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 14:07:43,156 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-14 14:07:43,157 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 14:07:43,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-14 14:07:43,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2023-02-14 14:07:43,162 INFO L87 Difference]: Start difference. First operand 236 states and 299 transitions. Second operand has 5 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 14:07:43,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 14:07:43,253 INFO L93 Difference]: Finished difference Result 328 states and 437 transitions. [2023-02-14 14:07:43,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-14 14:07:43,254 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2023-02-14 14:07:43,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 14:07:43,258 INFO L225 Difference]: With dead ends: 328 [2023-02-14 14:07:43,258 INFO L226 Difference]: Without dead ends: 327 [2023-02-14 14:07:43,258 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2023-02-14 14:07:43,262 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 41 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-14 14:07:43,263 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 96 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-14 14:07:43,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 327 states. [2023-02-14 14:07:43,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 327 to 293. [2023-02-14 14:07:43,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 293 states, 227 states have (on average 1.2599118942731278) internal successors, (286), 234 states have internal predecessors, (286), 45 states have call successors, (45), 16 states have call predecessors, (45), 15 states have return successors, (42), 42 states have call predecessors, (42), 42 states have call successors, (42) [2023-02-14 14:07:43,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 373 transitions. [2023-02-14 14:07:43,295 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 373 transitions. Word has length 16 [2023-02-14 14:07:43,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 14:07:43,295 INFO L495 AbstractCegarLoop]: Abstraction has 293 states and 373 transitions. [2023-02-14 14:07:43,296 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 14:07:43,296 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 373 transitions. [2023-02-14 14:07:43,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-02-14 14:07:43,297 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 14:07:43,297 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 14:07:43,334 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-02-14 14:07:43,501 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2023-02-14 14:07:43,502 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ackermannErr6ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2023-02-14 14:07:43,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 14:07:43,502 INFO L85 PathProgramCache]: Analyzing trace with hash 848163410, now seen corresponding path program 1 times [2023-02-14 14:07:43,502 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 14:07:43,502 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [588423054] [2023-02-14 14:07:43,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 14:07:43,503 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 14:07:43,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 14:07:43,561 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 14:07:43,562 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 14:07:43,562 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [588423054] [2023-02-14 14:07:43,562 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [588423054] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 14:07:43,562 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1378633764] [2023-02-14 14:07:43,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 14:07:43,562 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 14:07:43,563 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 14:07:43,566 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-14 14:07:43,569 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-02-14 14:07:43,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 14:07:43,599 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 6 conjunts are in the unsatisfiable core [2023-02-14 14:07:43,600 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 14:07:43,624 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 14:07:43,624 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 14:07:43,679 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 14:07:43,680 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1378633764] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 14:07:43,680 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 14:07:43,680 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 11 [2023-02-14 14:07:43,680 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [46295465] [2023-02-14 14:07:43,680 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 14:07:43,681 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-02-14 14:07:43,681 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 14:07:43,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-02-14 14:07:43,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2023-02-14 14:07:43,682 INFO L87 Difference]: Start difference. First operand 293 states and 373 transitions. Second operand has 12 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 8 states have internal predecessors, (31), 4 states have call successors, (4), 4 states have call predecessors, (4), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 14:07:43,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 14:07:43,892 INFO L93 Difference]: Finished difference Result 591 states and 792 transitions. [2023-02-14 14:07:43,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-02-14 14:07:43,893 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 8 states have internal predecessors, (31), 4 states have call successors, (4), 4 states have call predecessors, (4), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2023-02-14 14:07:43,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 14:07:43,896 INFO L225 Difference]: With dead ends: 591 [2023-02-14 14:07:43,897 INFO L226 Difference]: Without dead ends: 590 [2023-02-14 14:07:43,897 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=104, Invalid=238, Unknown=0, NotChecked=0, Total=342 [2023-02-14 14:07:43,898 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 156 mSDsluCounter, 171 mSDsCounter, 0 mSdLazyCounter, 160 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 159 SdHoareTripleChecker+Valid, 203 SdHoareTripleChecker+Invalid, 217 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 160 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-14 14:07:43,898 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [159 Valid, 203 Invalid, 217 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 160 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-14 14:07:43,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 590 states. [2023-02-14 14:07:43,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 590 to 521. [2023-02-14 14:07:43,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 521 states, 407 states have (on average 1.203931203931204) internal successors, (490), 414 states have internal predecessors, (490), 81 states have call successors, (81), 28 states have call predecessors, (81), 27 states have return successors, (78), 78 states have call predecessors, (78), 78 states have call successors, (78) [2023-02-14 14:07:43,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 521 states to 521 states and 649 transitions. [2023-02-14 14:07:43,950 INFO L78 Accepts]: Start accepts. Automaton has 521 states and 649 transitions. Word has length 19 [2023-02-14 14:07:43,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 14:07:43,950 INFO L495 AbstractCegarLoop]: Abstraction has 521 states and 649 transitions. [2023-02-14 14:07:43,950 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 8 states have internal predecessors, (31), 4 states have call successors, (4), 4 states have call predecessors, (4), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 14:07:43,951 INFO L276 IsEmpty]: Start isEmpty. Operand 521 states and 649 transitions. [2023-02-14 14:07:43,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-02-14 14:07:43,956 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 14:07:43,956 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] [2023-02-14 14:07:43,967 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-02-14 14:07:44,161 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 14:07:44,161 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2023-02-14 14:07:44,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 14:07:44,162 INFO L85 PathProgramCache]: Analyzing trace with hash 1106403678, now seen corresponding path program 1 times [2023-02-14 14:07:44,162 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 14:07:44,162 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1128237989] [2023-02-14 14:07:44,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 14:07:44,162 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 14:07:44,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 14:07:44,250 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-02-14 14:07:44,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 14:07:44,277 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-14 14:07:44,278 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 14:07:44,278 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1128237989] [2023-02-14 14:07:44,278 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1128237989] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 14:07:44,280 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [561979000] [2023-02-14 14:07:44,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 14:07:44,280 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 14:07:44,281 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 14:07:44,282 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) [2023-02-14 14:07:44,284 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-02-14 14:07:44,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 14:07:44,323 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 4 conjunts are in the unsatisfiable core [2023-02-14 14:07:44,326 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 14:07:44,357 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-14 14:07:44,357 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-14 14:07:44,358 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [561979000] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-14 14:07:44,358 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-02-14 14:07:44,361 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 10 [2023-02-14 14:07:44,361 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [267163991] [2023-02-14 14:07:44,362 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 14:07:44,362 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-14 14:07:44,362 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 14:07:44,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-14 14:07:44,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2023-02-14 14:07:44,363 INFO L87 Difference]: Start difference. First operand 521 states and 649 transitions. Second operand has 5 states, 3 states have (on average 6.333333333333333) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-14 14:07:44,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 14:07:44,453 INFO L93 Difference]: Finished difference Result 562 states and 696 transitions. [2023-02-14 14:07:44,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-02-14 14:07:44,456 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 3 states have (on average 6.333333333333333) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 24 [2023-02-14 14:07:44,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 14:07:44,459 INFO L225 Difference]: With dead ends: 562 [2023-02-14 14:07:44,459 INFO L226 Difference]: Without dead ends: 561 [2023-02-14 14:07:44,460 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2023-02-14 14:07:44,461 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 43 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-14 14:07:44,462 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 98 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-14 14:07:44,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 561 states. [2023-02-14 14:07:44,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 561 to 520. [2023-02-14 14:07:44,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 520 states, 407 states have (on average 1.194103194103194) internal successors, (486), 413 states have internal predecessors, (486), 81 states have call successors, (81), 28 states have call predecessors, (81), 27 states have return successors, (78), 78 states have call predecessors, (78), 78 states have call successors, (78) [2023-02-14 14:07:44,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 520 states to 520 states and 645 transitions. [2023-02-14 14:07:44,501 INFO L78 Accepts]: Start accepts. Automaton has 520 states and 645 transitions. Word has length 24 [2023-02-14 14:07:44,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 14:07:44,502 INFO L495 AbstractCegarLoop]: Abstraction has 520 states and 645 transitions. [2023-02-14 14:07:44,502 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 3 states have (on average 6.333333333333333) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-14 14:07:44,503 INFO L276 IsEmpty]: Start isEmpty. Operand 520 states and 645 transitions. [2023-02-14 14:07:44,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-02-14 14:07:44,504 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 14:07:44,504 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] [2023-02-14 14:07:44,512 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-02-14 14:07:44,709 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 14:07:44,709 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2023-02-14 14:07:44,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 14:07:44,710 INFO L85 PathProgramCache]: Analyzing trace with hash -61224288, now seen corresponding path program 1 times [2023-02-14 14:07:44,710 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 14:07:44,710 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1421119219] [2023-02-14 14:07:44,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 14:07:44,710 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 14:07:44,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 14:07:44,785 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-02-14 14:07:44,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 14:07:44,808 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-14 14:07:44,808 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 14:07:44,808 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1421119219] [2023-02-14 14:07:44,808 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1421119219] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 14:07:44,808 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [196846180] [2023-02-14 14:07:44,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 14:07:44,809 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 14:07:44,809 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 14:07:44,810 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) [2023-02-14 14:07:44,817 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-02-14 14:07:44,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 14:07:44,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 10 conjunts are in the unsatisfiable core [2023-02-14 14:07:44,848 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 14:07:44,903 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-14 14:07:44,904 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 14:07:45,028 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-14 14:07:45,029 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [196846180] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 14:07:45,029 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 14:07:45,029 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2023-02-14 14:07:45,029 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [120936468] [2023-02-14 14:07:45,029 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 14:07:45,030 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-02-14 14:07:45,030 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 14:07:45,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-02-14 14:07:45,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2023-02-14 14:07:45,031 INFO L87 Difference]: Start difference. First operand 520 states and 645 transitions. Second operand has 15 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 13 states have internal predecessors, (41), 6 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-14 14:07:45,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 14:07:45,369 INFO L93 Difference]: Finished difference Result 869 states and 1249 transitions. [2023-02-14 14:07:45,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-02-14 14:07:45,369 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 13 states have internal predecessors, (41), 6 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 25 [2023-02-14 14:07:45,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 14:07:45,376 INFO L225 Difference]: With dead ends: 869 [2023-02-14 14:07:45,376 INFO L226 Difference]: Without dead ends: 867 [2023-02-14 14:07:45,377 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 44 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=154, Invalid=496, Unknown=0, NotChecked=0, Total=650 [2023-02-14 14:07:45,377 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 172 mSDsluCounter, 115 mSDsCounter, 0 mSdLazyCounter, 201 mSolverCounterSat, 108 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 179 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 309 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 108 IncrementalHoareTripleChecker+Valid, 201 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-14 14:07:45,378 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [179 Valid, 134 Invalid, 309 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [108 Valid, 201 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-14 14:07:45,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 867 states. [2023-02-14 14:07:45,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 867 to 727. [2023-02-14 14:07:45,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 727 states, 542 states have (on average 1.1863468634686347) internal successors, (643), 571 states have internal predecessors, (643), 123 states have call successors, (123), 35 states have call predecessors, (123), 57 states have return successors, (215), 120 states have call predecessors, (215), 119 states have call successors, (215) [2023-02-14 14:07:45,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 727 states to 727 states and 981 transitions. [2023-02-14 14:07:45,455 INFO L78 Accepts]: Start accepts. Automaton has 727 states and 981 transitions. Word has length 25 [2023-02-14 14:07:45,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 14:07:45,455 INFO L495 AbstractCegarLoop]: Abstraction has 727 states and 981 transitions. [2023-02-14 14:07:45,455 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 13 states have internal predecessors, (41), 6 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-14 14:07:45,456 INFO L276 IsEmpty]: Start isEmpty. Operand 727 states and 981 transitions. [2023-02-14 14:07:45,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-02-14 14:07:45,456 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 14:07:45,457 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] [2023-02-14 14:07:45,464 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-02-14 14:07:45,662 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-02-14 14:07:45,662 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ackermannErr6ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2023-02-14 14:07:45,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 14:07:45,663 INFO L85 PathProgramCache]: Analyzing trace with hash 1298021223, now seen corresponding path program 1 times [2023-02-14 14:07:45,663 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 14:07:45,663 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [695955561] [2023-02-14 14:07:45,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 14:07:45,663 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 14:07:45,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 14:07:45,763 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-02-14 14:07:45,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 14:07:45,785 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-02-14 14:07:45,786 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 14:07:45,786 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [695955561] [2023-02-14 14:07:45,786 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [695955561] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 14:07:45,786 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1729340608] [2023-02-14 14:07:45,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 14:07:45,787 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 14:07:45,787 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 14:07:45,788 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) [2023-02-14 14:07:45,790 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-02-14 14:07:45,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 14:07:45,825 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 8 conjunts are in the unsatisfiable core [2023-02-14 14:07:45,827 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 14:07:45,887 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-14 14:07:45,887 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 14:07:46,006 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-14 14:07:46,007 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1729340608] provided 1 perfect and 1 imperfect interpolant sequences [2023-02-14 14:07:46,007 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-02-14 14:07:46,007 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 6] total 13 [2023-02-14 14:07:46,008 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [289024936] [2023-02-14 14:07:46,008 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 14:07:46,009 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-02-14 14:07:46,009 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 14:07:46,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-02-14 14:07:46,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2023-02-14 14:07:46,009 INFO L87 Difference]: Start difference. First operand 727 states and 981 transitions. Second operand has 7 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 states have internal predecessors, (23), 3 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-14 14:07:46,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 14:07:46,200 INFO L93 Difference]: Finished difference Result 886 states and 1251 transitions. [2023-02-14 14:07:46,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-02-14 14:07:46,201 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 states have internal predecessors, (23), 3 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 27 [2023-02-14 14:07:46,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 14:07:46,205 INFO L225 Difference]: With dead ends: 886 [2023-02-14 14:07:46,206 INFO L226 Difference]: Without dead ends: 885 [2023-02-14 14:07:46,206 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 49 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2023-02-14 14:07:46,207 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 51 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 133 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 158 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 133 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-14 14:07:46,207 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [57 Valid, 109 Invalid, 158 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 133 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-14 14:07:46,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 885 states. [2023-02-14 14:07:46,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 885 to 812. [2023-02-14 14:07:46,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 812 states, 602 states have (on average 1.1843853820598007) internal successors, (713), 633 states have internal predecessors, (713), 143 states have call successors, (143), 38 states have call predecessors, (143), 62 states have return successors, (220), 140 states have call predecessors, (220), 139 states have call successors, (220) [2023-02-14 14:07:46,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 812 states to 812 states and 1076 transitions. [2023-02-14 14:07:46,287 INFO L78 Accepts]: Start accepts. Automaton has 812 states and 1076 transitions. Word has length 27 [2023-02-14 14:07:46,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 14:07:46,287 INFO L495 AbstractCegarLoop]: Abstraction has 812 states and 1076 transitions. [2023-02-14 14:07:46,287 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 states have internal predecessors, (23), 3 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-14 14:07:46,287 INFO L276 IsEmpty]: Start isEmpty. Operand 812 states and 1076 transitions. [2023-02-14 14:07:46,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2023-02-14 14:07:46,288 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 14:07:46,288 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] [2023-02-14 14:07:46,299 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-02-14 14:07:46,494 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 14:07:46,494 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2023-02-14 14:07:46,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 14:07:46,495 INFO L85 PathProgramCache]: Analyzing trace with hash -722353775, now seen corresponding path program 1 times [2023-02-14 14:07:46,495 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 14:07:46,495 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1979643812] [2023-02-14 14:07:46,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 14:07:46,495 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 14:07:46,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 14:07:46,539 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-02-14 14:07:46,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 14:07:46,561 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-02-14 14:07:46,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 14:07:46,599 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-02-14 14:07:46,600 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 14:07:46,600 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1979643812] [2023-02-14 14:07:46,600 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1979643812] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 14:07:46,600 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [612637232] [2023-02-14 14:07:46,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 14:07:46,600 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 14:07:46,600 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 14:07:46,602 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) [2023-02-14 14:07:46,605 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-02-14 14:07:46,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 14:07:46,639 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 9 conjunts are in the unsatisfiable core [2023-02-14 14:07:46,640 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 14:07:46,677 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-02-14 14:07:46,677 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 14:07:46,866 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-02-14 14:07:46,866 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [612637232] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 14:07:46,866 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 14:07:46,866 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2023-02-14 14:07:46,866 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1246271821] [2023-02-14 14:07:46,866 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 14:07:46,867 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-02-14 14:07:46,867 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 14:07:46,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-02-14 14:07:46,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2023-02-14 14:07:46,869 INFO L87 Difference]: Start difference. First operand 812 states and 1076 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) [2023-02-14 14:07:47,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 14:07:47,388 INFO L93 Difference]: Finished difference Result 1503 states and 2506 transitions. [2023-02-14 14:07:47,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-02-14 14:07:47,388 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 [2023-02-14 14:07:47,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 14:07:47,397 INFO L225 Difference]: With dead ends: 1503 [2023-02-14 14:07:47,398 INFO L226 Difference]: Without dead ends: 1501 [2023-02-14 14:07:47,399 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=188, Invalid=682, Unknown=0, NotChecked=0, Total=870 [2023-02-14 14:07:47,400 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 149 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 278 mSolverCounterSat, 134 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 149 SdHoareTripleChecker+Valid, 158 SdHoareTripleChecker+Invalid, 412 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 134 IncrementalHoareTripleChecker+Valid, 278 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-14 14:07:47,400 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [149 Valid, 158 Invalid, 412 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [134 Valid, 278 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-14 14:07:47,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1501 states. [2023-02-14 14:07:47,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1501 to 1258. [2023-02-14 14:07:47,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1258 states, 902 states have (on average 1.1696230598669624) internal successors, (1055), 947 states have internal predecessors, (1055), 241 states have call successors, (241), 53 states have call predecessors, (241), 110 states have return successors, (548), 257 states have call predecessors, (548), 236 states have call successors, (548) [2023-02-14 14:07:47,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1258 states to 1258 states and 1844 transitions. [2023-02-14 14:07:47,511 INFO L78 Accepts]: Start accepts. Automaton has 1258 states and 1844 transitions. Word has length 34 [2023-02-14 14:07:47,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 14:07:47,512 INFO L495 AbstractCegarLoop]: Abstraction has 1258 states and 1844 transitions. [2023-02-14 14:07:47,512 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) [2023-02-14 14:07:47,512 INFO L276 IsEmpty]: Start isEmpty. Operand 1258 states and 1844 transitions. [2023-02-14 14:07:47,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2023-02-14 14:07:47,513 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 14:07:47,513 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 14:07:47,521 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-02-14 14:07:47,718 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 14:07:47,719 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ackermannErr6ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2023-02-14 14:07:47,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 14:07:47,719 INFO L85 PathProgramCache]: Analyzing trace with hash -1979265987, now seen corresponding path program 2 times [2023-02-14 14:07:47,719 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 14:07:47,719 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1039492292] [2023-02-14 14:07:47,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 14:07:47,719 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 14:07:47,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 14:07:47,806 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-02-14 14:07:47,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 14:07:47,834 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-02-14 14:07:47,835 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 14:07:47,835 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1039492292] [2023-02-14 14:07:47,835 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1039492292] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 14:07:47,835 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [18446632] [2023-02-14 14:07:47,835 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-14 14:07:47,835 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 14:07:47,836 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 14:07:47,837 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) [2023-02-14 14:07:47,845 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-02-14 14:07:47,884 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-14 14:07:47,884 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 14:07:47,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 12 conjunts are in the unsatisfiable core [2023-02-14 14:07:47,887 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 14:07:47,943 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-02-14 14:07:47,943 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 14:07:48,096 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 4 proven. 14 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-02-14 14:07:48,097 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [18446632] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 14:07:48,097 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 14:07:48,097 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2023-02-14 14:07:48,097 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [134258073] [2023-02-14 14:07:48,097 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 14:07:48,098 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-02-14 14:07:48,098 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 14:07:48,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-02-14 14:07:48,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2023-02-14 14:07:48,099 INFO L87 Difference]: Start difference. First operand 1258 states and 1844 transitions. Second operand has 19 states, 16 states have (on average 2.9375) internal successors, (47), 15 states have internal predecessors, (47), 6 states have call successors, (8), 5 states have call predecessors, (8), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-14 14:07:48,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 14:07:48,714 INFO L93 Difference]: Finished difference Result 2350 states and 3816 transitions. [2023-02-14 14:07:48,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-02-14 14:07:48,715 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 16 states have (on average 2.9375) internal successors, (47), 15 states have internal predecessors, (47), 6 states have call successors, (8), 5 states have call predecessors, (8), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 35 [2023-02-14 14:07:48,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 14:07:48,730 INFO L225 Difference]: With dead ends: 2350 [2023-02-14 14:07:48,731 INFO L226 Difference]: Without dead ends: 2333 [2023-02-14 14:07:48,735 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 63 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=323, Invalid=1009, Unknown=0, NotChecked=0, Total=1332 [2023-02-14 14:07:48,735 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 314 mSDsluCounter, 146 mSDsCounter, 0 mSdLazyCounter, 344 mSolverCounterSat, 214 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 314 SdHoareTripleChecker+Valid, 165 SdHoareTripleChecker+Invalid, 558 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 214 IncrementalHoareTripleChecker+Valid, 344 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-14 14:07:48,735 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [314 Valid, 165 Invalid, 558 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [214 Valid, 344 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-14 14:07:48,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2333 states. [2023-02-14 14:07:48,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2333 to 1748. [2023-02-14 14:07:48,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1748 states, 1275 states have (on average 1.1654901960784314) internal successors, (1486), 1333 states have internal predecessors, (1486), 308 states have call successors, (308), 82 states have call predecessors, (308), 160 states have return successors, (829), 332 states have call predecessors, (829), 300 states have call successors, (829) [2023-02-14 14:07:48,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1748 states to 1748 states and 2623 transitions. [2023-02-14 14:07:48,915 INFO L78 Accepts]: Start accepts. Automaton has 1748 states and 2623 transitions. Word has length 35 [2023-02-14 14:07:48,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 14:07:48,915 INFO L495 AbstractCegarLoop]: Abstraction has 1748 states and 2623 transitions. [2023-02-14 14:07:48,915 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 16 states have (on average 2.9375) internal successors, (47), 15 states have internal predecessors, (47), 6 states have call successors, (8), 5 states have call predecessors, (8), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-14 14:07:48,915 INFO L276 IsEmpty]: Start isEmpty. Operand 1748 states and 2623 transitions. [2023-02-14 14:07:48,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2023-02-14 14:07:48,916 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 14:07:48,916 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] [2023-02-14 14:07:48,929 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-02-14 14:07:49,121 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-02-14 14:07:49,122 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ackermannErr6ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2023-02-14 14:07:49,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 14:07:49,123 INFO L85 PathProgramCache]: Analyzing trace with hash 1607744024, now seen corresponding path program 1 times [2023-02-14 14:07:49,123 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 14:07:49,123 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1230049868] [2023-02-14 14:07:49,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 14:07:49,123 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 14:07:49,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 14:07:49,176 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-02-14 14:07:49,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 14:07:49,197 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-02-14 14:07:49,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 14:07:49,225 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 14 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-02-14 14:07:49,226 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 14:07:49,226 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1230049868] [2023-02-14 14:07:49,226 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1230049868] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 14:07:49,226 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [798665489] [2023-02-14 14:07:49,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 14:07:49,226 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 14:07:49,227 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 14:07:49,228 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) [2023-02-14 14:07:49,230 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-02-14 14:07:49,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 14:07:49,267 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 9 conjunts are in the unsatisfiable core [2023-02-14 14:07:49,268 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 14:07:49,307 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 12 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-02-14 14:07:49,307 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 14:07:49,491 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-02-14 14:07:49,491 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [798665489] provided 1 perfect and 1 imperfect interpolant sequences [2023-02-14 14:07:49,491 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-02-14 14:07:49,492 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8, 8] total 17 [2023-02-14 14:07:49,492 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [285179500] [2023-02-14 14:07:49,492 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 14:07:49,492 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-02-14 14:07:49,492 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 14:07:49,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-02-14 14:07:49,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2023-02-14 14:07:49,493 INFO L87 Difference]: Start difference. First operand 1748 states and 2623 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) [2023-02-14 14:07:49,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 14:07:49,788 INFO L93 Difference]: Finished difference Result 1905 states and 3109 transitions. [2023-02-14 14:07:49,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-02-14 14:07:49,789 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 [2023-02-14 14:07:49,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 14:07:49,800 INFO L225 Difference]: With dead ends: 1905 [2023-02-14 14:07:49,800 INFO L226 Difference]: Without dead ends: 1904 [2023-02-14 14:07:49,802 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=100, Invalid=550, Unknown=0, NotChecked=0, Total=650 [2023-02-14 14:07:49,803 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 47 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 177 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 149 SdHoareTripleChecker+Invalid, 204 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 177 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-14 14:07:49,803 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 149 Invalid, 204 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 177 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-14 14:07:49,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1904 states. [2023-02-14 14:07:49,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1904 to 1729. [2023-02-14 14:07:49,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1729 states, 1266 states have (on average 1.1642969984202212) internal successors, (1474), 1324 states have internal predecessors, (1474), 305 states have call successors, (305), 82 states have call predecessors, (305), 153 states have return successors, (696), 322 states have call predecessors, (696), 297 states have call successors, (696) [2023-02-14 14:07:49,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1729 states to 1729 states and 2475 transitions. [2023-02-14 14:07:49,943 INFO L78 Accepts]: Start accepts. Automaton has 1729 states and 2475 transitions. Word has length 36 [2023-02-14 14:07:49,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 14:07:49,943 INFO L495 AbstractCegarLoop]: Abstraction has 1729 states and 2475 transitions. [2023-02-14 14:07:49,944 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) [2023-02-14 14:07:49,944 INFO L276 IsEmpty]: Start isEmpty. Operand 1729 states and 2475 transitions. [2023-02-14 14:07:49,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-02-14 14:07:49,945 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 14:07:49,945 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1] [2023-02-14 14:07:49,953 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-02-14 14:07:50,150 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-02-14 14:07:50,151 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ackermannErr6ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2023-02-14 14:07:50,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 14:07:50,151 INFO L85 PathProgramCache]: Analyzing trace with hash -1390366252, now seen corresponding path program 2 times [2023-02-14 14:07:50,151 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 14:07:50,152 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1818753271] [2023-02-14 14:07:50,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 14:07:50,152 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 14:07:50,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 14:07:50,279 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 14:07:50,280 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 14:07:50,280 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1818753271] [2023-02-14 14:07:50,280 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1818753271] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 14:07:50,280 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [797365950] [2023-02-14 14:07:50,280 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-14 14:07:50,280 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 14:07:50,281 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 14:07:50,282 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) [2023-02-14 14:07:50,311 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-02-14 14:07:50,332 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-14 14:07:50,333 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 14:07:50,334 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 12 conjunts are in the unsatisfiable core [2023-02-14 14:07:50,335 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 14:07:50,391 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 14:07:50,391 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 14:07:50,572 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 14:07:50,572 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [797365950] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 14:07:50,572 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 14:07:50,572 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 23 [2023-02-14 14:07:50,572 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1611815812] [2023-02-14 14:07:50,572 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 14:07:50,573 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-02-14 14:07:50,573 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 14:07:50,573 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-02-14 14:07:50,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=416, Unknown=0, NotChecked=0, Total=552 [2023-02-14 14:07:50,574 INFO L87 Difference]: Start difference. First operand 1729 states and 2475 transitions. Second operand has 24 states, 21 states have (on average 3.4761904761904763) internal successors, (73), 14 states have internal predecessors, (73), 10 states have call successors, (10), 10 states have call predecessors, (10), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 14:07:51,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 14:07:51,229 INFO L93 Difference]: Finished difference Result 2553 states and 3969 transitions. [2023-02-14 14:07:51,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2023-02-14 14:07:51,231 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 21 states have (on average 3.4761904761904763) internal successors, (73), 14 states have internal predecessors, (73), 10 states have call successors, (10), 10 states have call predecessors, (10), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2023-02-14 14:07:51,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 14:07:51,246 INFO L225 Difference]: With dead ends: 2553 [2023-02-14 14:07:51,246 INFO L226 Difference]: Without dead ends: 2552 [2023-02-14 14:07:51,249 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 74 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 339 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=554, Invalid=1252, Unknown=0, NotChecked=0, Total=1806 [2023-02-14 14:07:51,249 INFO L413 NwaCegarLoop]: 56 mSDtfsCounter, 512 mSDsluCounter, 416 mSDsCounter, 0 mSdLazyCounter, 509 mSolverCounterSat, 168 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 515 SdHoareTripleChecker+Valid, 472 SdHoareTripleChecker+Invalid, 677 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 168 IncrementalHoareTripleChecker+Valid, 509 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-14 14:07:51,249 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [515 Valid, 472 Invalid, 677 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [168 Valid, 509 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-14 14:07:51,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2552 states. [2023-02-14 14:07:51,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2552 to 2411. [2023-02-14 14:07:51,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2411 states, 1751 states have (on average 1.1462021701884637) internal successors, (2007), 1838 states have internal predecessors, (2007), 425 states have call successors, (425), 106 states have call predecessors, (425), 230 states have return successors, (994), 466 states have call predecessors, (994), 417 states have call successors, (994) [2023-02-14 14:07:51,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2411 states to 2411 states and 3426 transitions. [2023-02-14 14:07:51,457 INFO L78 Accepts]: Start accepts. Automaton has 2411 states and 3426 transitions. Word has length 43 [2023-02-14 14:07:51,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 14:07:51,458 INFO L495 AbstractCegarLoop]: Abstraction has 2411 states and 3426 transitions. [2023-02-14 14:07:51,458 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 21 states have (on average 3.4761904761904763) internal successors, (73), 14 states have internal predecessors, (73), 10 states have call successors, (10), 10 states have call predecessors, (10), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 14:07:51,458 INFO L276 IsEmpty]: Start isEmpty. Operand 2411 states and 3426 transitions. [2023-02-14 14:07:51,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2023-02-14 14:07:51,460 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 14:07:51,460 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] [2023-02-14 14:07:51,466 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-02-14 14:07:51,665 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-02-14 14:07:51,666 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ackermannErr6ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2023-02-14 14:07:51,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 14:07:51,666 INFO L85 PathProgramCache]: Analyzing trace with hash -1058043410, now seen corresponding path program 2 times [2023-02-14 14:07:51,666 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 14:07:51,666 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1419612145] [2023-02-14 14:07:51,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 14:07:51,667 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 14:07:51,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 14:07:51,724 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-02-14 14:07:51,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 14:07:51,745 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-02-14 14:07:51,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 14:07:51,774 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 26 proven. 8 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-02-14 14:07:51,774 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 14:07:51,775 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1419612145] [2023-02-14 14:07:51,775 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1419612145] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 14:07:51,775 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [987760240] [2023-02-14 14:07:51,775 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-14 14:07:51,775 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 14:07:51,775 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 14:07:51,776 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) [2023-02-14 14:07:51,779 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-02-14 14:07:51,816 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-14 14:07:51,816 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 14:07:51,817 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 11 conjunts are in the unsatisfiable core [2023-02-14 14:07:51,818 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 14:07:51,872 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 24 proven. 10 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-02-14 14:07:51,873 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 14:07:52,076 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 28 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-02-14 14:07:52,077 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [987760240] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 14:07:52,077 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 14:07:52,077 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 21 [2023-02-14 14:07:52,077 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1041956598] [2023-02-14 14:07:52,077 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 14:07:52,078 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-02-14 14:07:52,078 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 14:07:52,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-02-14 14:07:52,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2023-02-14 14:07:52,079 INFO L87 Difference]: Start difference. First operand 2411 states and 3426 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) [2023-02-14 14:07:53,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 14:07:53,385 INFO L93 Difference]: Finished difference Result 5115 states and 8898 transitions. [2023-02-14 14:07:53,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-02-14 14:07:53,385 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 [2023-02-14 14:07:53,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 14:07:53,407 INFO L225 Difference]: With dead ends: 5115 [2023-02-14 14:07:53,407 INFO L226 Difference]: Without dead ends: 3631 [2023-02-14 14:07:53,421 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 481 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=582, Invalid=1968, Unknown=0, NotChecked=0, Total=2550 [2023-02-14 14:07:53,422 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 278 mSDsluCounter, 268 mSDsCounter, 0 mSdLazyCounter, 743 mSolverCounterSat, 391 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 278 SdHoareTripleChecker+Valid, 304 SdHoareTripleChecker+Invalid, 1134 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 391 IncrementalHoareTripleChecker+Valid, 743 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-02-14 14:07:53,422 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [278 Valid, 304 Invalid, 1134 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [391 Valid, 743 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-02-14 14:07:53,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3631 states. [2023-02-14 14:07:53,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3631 to 2793. [2023-02-14 14:07:53,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2793 states, 2029 states have (on average 1.141941843272548) internal successors, (2317), 2127 states have internal predecessors, (2317), 496 states have call successors, (496), 126 states have call predecessors, (496), 263 states have return successors, (1090), 539 states have call predecessors, (1090), 488 states have call successors, (1090) [2023-02-14 14:07:53,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2793 states to 2793 states and 3903 transitions. [2023-02-14 14:07:53,690 INFO L78 Accepts]: Start accepts. Automaton has 2793 states and 3903 transitions. Word has length 44 [2023-02-14 14:07:53,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 14:07:53,690 INFO L495 AbstractCegarLoop]: Abstraction has 2793 states and 3903 transitions. [2023-02-14 14:07:53,691 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) [2023-02-14 14:07:53,691 INFO L276 IsEmpty]: Start isEmpty. Operand 2793 states and 3903 transitions. [2023-02-14 14:07:53,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2023-02-14 14:07:53,693 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 14:07:53,693 INFO L195 NwaCegarLoop]: trace histogram [5, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 14:07:53,698 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-02-14 14:07:53,898 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-02-14 14:07:53,898 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2023-02-14 14:07:53,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 14:07:53,899 INFO L85 PathProgramCache]: Analyzing trace with hash 1051982124, now seen corresponding path program 1 times [2023-02-14 14:07:53,899 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 14:07:53,899 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1500870878] [2023-02-14 14:07:53,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 14:07:53,899 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 14:07:53,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 14:07:53,929 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-02-14 14:07:53,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 14:07:53,944 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-02-14 14:07:53,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 14:07:53,963 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2023-02-14 14:07:53,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 14:07:53,967 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 24 proven. 5 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-02-14 14:07:53,967 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 14:07:53,967 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1500870878] [2023-02-14 14:07:53,967 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1500870878] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 14:07:53,967 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [969862171] [2023-02-14 14:07:53,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 14:07:53,968 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 14:07:53,968 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 14:07:53,969 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) [2023-02-14 14:07:53,971 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-02-14 14:07:54,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 14:07:54,010 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 6 conjunts are in the unsatisfiable core [2023-02-14 14:07:54,011 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 14:07:54,055 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 22 proven. 5 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-02-14 14:07:54,055 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 14:07:54,167 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 22 proven. 5 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-02-14 14:07:54,167 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [969862171] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 14:07:54,167 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 14:07:54,167 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7, 7] total 12 [2023-02-14 14:07:54,168 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2103943448] [2023-02-14 14:07:54,168 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 14:07:54,168 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-02-14 14:07:54,168 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 14:07:54,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-02-14 14:07:54,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2023-02-14 14:07:54,169 INFO L87 Difference]: Start difference. First operand 2793 states and 3903 transitions. Second operand has 12 states, 12 states have (on average 4.0) internal successors, (48), 12 states have internal predecessors, (48), 4 states have call successors, (6), 2 states have call predecessors, (6), 5 states have return successors, (5), 2 states have call predecessors, (5), 4 states have call successors, (5) [2023-02-14 14:07:54,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 14:07:54,417 INFO L93 Difference]: Finished difference Result 4152 states and 6111 transitions. [2023-02-14 14:07:54,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-02-14 14:07:54,417 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.0) internal successors, (48), 12 states have internal predecessors, (48), 4 states have call successors, (6), 2 states have call predecessors, (6), 5 states have return successors, (5), 2 states have call predecessors, (5), 4 states have call successors, (5) Word has length 44 [2023-02-14 14:07:54,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 14:07:54,426 INFO L225 Difference]: With dead ends: 4152 [2023-02-14 14:07:54,427 INFO L226 Difference]: Without dead ends: 1643 [2023-02-14 14:07:54,440 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 87 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2023-02-14 14:07:54,441 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 71 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 122 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 162 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 122 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-14 14:07:54,441 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [71 Valid, 106 Invalid, 162 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 122 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-14 14:07:54,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1643 states. [2023-02-14 14:07:54,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1643 to 1622. [2023-02-14 14:07:54,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1622 states, 1209 states have (on average 1.1017369727047146) internal successors, (1332), 1241 states have internal predecessors, (1332), 292 states have call successors, (292), 91 states have call predecessors, (292), 117 states have return successors, (461), 289 states have call predecessors, (461), 288 states have call successors, (461) [2023-02-14 14:07:54,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1622 states to 1622 states and 2085 transitions. [2023-02-14 14:07:54,566 INFO L78 Accepts]: Start accepts. Automaton has 1622 states and 2085 transitions. Word has length 44 [2023-02-14 14:07:54,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 14:07:54,566 INFO L495 AbstractCegarLoop]: Abstraction has 1622 states and 2085 transitions. [2023-02-14 14:07:54,566 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.0) internal successors, (48), 12 states have internal predecessors, (48), 4 states have call successors, (6), 2 states have call predecessors, (6), 5 states have return successors, (5), 2 states have call predecessors, (5), 4 states have call successors, (5) [2023-02-14 14:07:54,566 INFO L276 IsEmpty]: Start isEmpty. Operand 1622 states and 2085 transitions. [2023-02-14 14:07:54,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2023-02-14 14:07:54,568 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 14:07:54,568 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] [2023-02-14 14:07:54,573 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-02-14 14:07:54,773 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-02-14 14:07:54,774 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2023-02-14 14:07:54,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 14:07:54,774 INFO L85 PathProgramCache]: Analyzing trace with hash 843839239, now seen corresponding path program 1 times [2023-02-14 14:07:54,774 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 14:07:54,774 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1061765810] [2023-02-14 14:07:54,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 14:07:54,775 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 14:07:54,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 14:07:54,851 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-02-14 14:07:54,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 14:07:54,906 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-02-14 14:07:54,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 14:07:54,929 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-02-14 14:07:54,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 14:07:54,958 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2023-02-14 14:07:54,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 14:07:54,987 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 21 proven. 16 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-02-14 14:07:54,987 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 14:07:54,987 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1061765810] [2023-02-14 14:07:54,988 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1061765810] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 14:07:54,988 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2107267790] [2023-02-14 14:07:54,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 14:07:54,988 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 14:07:54,988 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 14:07:54,989 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) [2023-02-14 14:07:54,993 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-02-14 14:07:55,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 14:07:55,035 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 15 conjunts are in the unsatisfiable core [2023-02-14 14:07:55,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 14:07:55,078 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 14 proven. 18 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2023-02-14 14:07:55,078 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 14:07:55,503 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 18 proven. 19 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-02-14 14:07:55,503 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2107267790] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 14:07:55,503 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 14:07:55,504 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 13] total 26 [2023-02-14 14:07:55,504 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1310940191] [2023-02-14 14:07:55,504 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 14:07:55,504 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-02-14 14:07:55,504 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 14:07:55,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-02-14 14:07:55,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=614, Unknown=0, NotChecked=0, Total=702 [2023-02-14 14:07:55,505 INFO L87 Difference]: Start difference. First operand 1622 states and 2085 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) [2023-02-14 14:07:57,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 14:07:57,044 INFO L93 Difference]: Finished difference Result 4071 states and 7472 transitions. [2023-02-14 14:07:57,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2023-02-14 14:07:57,045 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 [2023-02-14 14:07:57,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 14:07:57,073 INFO L225 Difference]: With dead ends: 4071 [2023-02-14 14:07:57,073 INFO L226 Difference]: Without dead ends: 4065 [2023-02-14 14:07:57,078 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1683 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1154, Invalid=5008, Unknown=0, NotChecked=0, Total=6162 [2023-02-14 14:07:57,079 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 236 mSDsluCounter, 236 mSDsCounter, 0 mSdLazyCounter, 787 mSolverCounterSat, 437 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 247 SdHoareTripleChecker+Valid, 258 SdHoareTripleChecker+Invalid, 1224 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 437 IncrementalHoareTripleChecker+Valid, 787 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-02-14 14:07:57,079 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [247 Valid, 258 Invalid, 1224 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [437 Valid, 787 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-02-14 14:07:57,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4065 states. [2023-02-14 14:07:57,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4065 to 2921. [2023-02-14 14:07:57,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2921 states, 2020 states have (on average 1.0787128712871288) internal successors, (2179), 2052 states have internal predecessors, (2179), 557 states have call successors, (557), 105 states have call predecessors, (557), 340 states have return successors, (3218), 763 states have call predecessors, (3218), 551 states have call successors, (3218) [2023-02-14 14:07:57,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2921 states to 2921 states and 5954 transitions. [2023-02-14 14:07:57,458 INFO L78 Accepts]: Start accepts. Automaton has 2921 states and 5954 transitions. Word has length 53 [2023-02-14 14:07:57,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 14:07:57,458 INFO L495 AbstractCegarLoop]: Abstraction has 2921 states and 5954 transitions. [2023-02-14 14:07:57,459 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) [2023-02-14 14:07:57,460 INFO L276 IsEmpty]: Start isEmpty. Operand 2921 states and 5954 transitions. [2023-02-14 14:07:57,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2023-02-14 14:07:57,462 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 14:07:57,462 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1] [2023-02-14 14:07:57,470 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-02-14 14:07:57,667 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 14:07:57,668 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ackermannErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2023-02-14 14:07:57,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 14:07:57,668 INFO L85 PathProgramCache]: Analyzing trace with hash 2013961680, now seen corresponding path program 1 times [2023-02-14 14:07:57,668 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 14:07:57,668 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2060818106] [2023-02-14 14:07:57,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 14:07:57,668 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 14:07:57,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 14:07:57,846 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 111 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-02-14 14:07:57,846 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 14:07:57,847 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2060818106] [2023-02-14 14:07:57,847 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2060818106] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 14:07:57,847 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1987785216] [2023-02-14 14:07:57,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 14:07:57,847 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 14:07:57,847 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 14:07:57,849 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) [2023-02-14 14:07:57,878 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-02-14 14:07:57,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 14:07:57,909 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 18 conjunts are in the unsatisfiable core [2023-02-14 14:07:57,912 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 14:07:57,976 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 111 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-02-14 14:07:57,976 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 14:07:58,164 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 111 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-02-14 14:07:58,165 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1987785216] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 14:07:58,165 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 14:07:58,165 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 23 [2023-02-14 14:07:58,165 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [940805052] [2023-02-14 14:07:58,165 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 14:07:58,166 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-02-14 14:07:58,166 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 14:07:58,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-02-14 14:07:58,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=416, Unknown=0, NotChecked=0, Total=552 [2023-02-14 14:07:58,167 INFO L87 Difference]: Start difference. First operand 2921 states and 5954 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) [2023-02-14 14:07:59,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 14:07:59,121 INFO L93 Difference]: Finished difference Result 7980 states and 16569 transitions. [2023-02-14 14:07:59,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2023-02-14 14:07:59,121 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 [2023-02-14 14:07:59,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 14:07:59,181 INFO L225 Difference]: With dead ends: 7980 [2023-02-14 14:07:59,181 INFO L226 Difference]: Without dead ends: 7979 [2023-02-14 14:07:59,187 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 107 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 339 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=554, Invalid=1252, Unknown=0, NotChecked=0, Total=1806 [2023-02-14 14:07:59,188 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 868 mSDsluCounter, 269 mSDsCounter, 0 mSdLazyCounter, 355 mSolverCounterSat, 319 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 873 SdHoareTripleChecker+Valid, 299 SdHoareTripleChecker+Invalid, 674 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 319 IncrementalHoareTripleChecker+Valid, 355 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-14 14:07:59,188 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [873 Valid, 299 Invalid, 674 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [319 Valid, 355 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-14 14:07:59,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7979 states. [2023-02-14 14:07:59,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7979 to 7895. [2023-02-14 14:07:59,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7895 states, 5500 states have (on average 1.0812727272727272) internal successors, (5947), 5604 states have internal predecessors, (5947), 1505 states have call successors, (1505), 303 states have call predecessors, (1505), 886 states have return successors, (8678), 1987 states have call predecessors, (8678), 1499 states have call successors, (8678) [2023-02-14 14:08:00,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7895 states to 7895 states and 16130 transitions. [2023-02-14 14:08:00,070 INFO L78 Accepts]: Start accepts. Automaton has 7895 states and 16130 transitions. Word has length 57 [2023-02-14 14:08:00,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 14:08:00,071 INFO L495 AbstractCegarLoop]: Abstraction has 7895 states and 16130 transitions. [2023-02-14 14:08:00,071 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) [2023-02-14 14:08:00,071 INFO L276 IsEmpty]: Start isEmpty. Operand 7895 states and 16130 transitions. [2023-02-14 14:08:00,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2023-02-14 14:08:00,072 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 14:08:00,073 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] [2023-02-14 14:08:00,083 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-02-14 14:08:00,278 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 14:08:00,278 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ackermannErr6ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2023-02-14 14:08:00,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 14:08:00,279 INFO L85 PathProgramCache]: Analyzing trace with hash -814290418, now seen corresponding path program 1 times [2023-02-14 14:08:00,279 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 14:08:00,279 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1673103415] [2023-02-14 14:08:00,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 14:08:00,280 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 14:08:00,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 14:08:00,355 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-02-14 14:08:00,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 14:08:00,393 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-02-14 14:08:00,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 14:08:00,416 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-02-14 14:08:00,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 14:08:00,445 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2023-02-14 14:08:00,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 14:08:00,471 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 36 proven. 6 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-02-14 14:08:00,471 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 14:08:00,471 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1673103415] [2023-02-14 14:08:00,471 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1673103415] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 14:08:00,471 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [260800968] [2023-02-14 14:08:00,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 14:08:00,472 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 14:08:00,472 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 14:08:00,473 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) [2023-02-14 14:08:00,477 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-02-14 14:08:00,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 14:08:00,535 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 15 conjunts are in the unsatisfiable core [2023-02-14 14:08:00,537 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 14:08:00,579 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 27 proven. 10 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2023-02-14 14:08:00,579 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 14:08:01,018 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 40 proven. 2 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-02-14 14:08:01,018 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [260800968] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 14:08:01,018 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 14:08:01,018 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 13] total 26 [2023-02-14 14:08:01,019 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [870416960] [2023-02-14 14:08:01,019 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 14:08:01,019 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-02-14 14:08:01,019 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 14:08:01,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-02-14 14:08:01,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=608, Unknown=0, NotChecked=0, Total=702 [2023-02-14 14:08:01,020 INFO L87 Difference]: Start difference. First operand 7895 states and 16130 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) [2023-02-14 14:08:03,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 14:08:03,499 INFO L93 Difference]: Finished difference Result 27455 states and 98845 transitions. [2023-02-14 14:08:03,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2023-02-14 14:08:03,500 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 [2023-02-14 14:08:03,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 14:08:03,741 INFO L225 Difference]: With dead ends: 27455 [2023-02-14 14:08:03,742 INFO L226 Difference]: Without dead ends: 20915 [2023-02-14 14:08:03,869 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 815 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=905, Invalid=3517, Unknown=0, NotChecked=0, Total=4422 [2023-02-14 14:08:03,870 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 124 mSDsluCounter, 284 mSDsCounter, 0 mSdLazyCounter, 692 mSolverCounterSat, 194 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 320 SdHoareTripleChecker+Invalid, 886 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 194 IncrementalHoareTripleChecker+Valid, 692 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-02-14 14:08:03,870 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [124 Valid, 320 Invalid, 886 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [194 Valid, 692 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-02-14 14:08:03,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20915 states. [2023-02-14 14:08:06,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20915 to 16588. [2023-02-14 14:08:06,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16588 states, 10884 states have (on average 1.0526460859977949) internal successors, (11457), 10949 states have internal predecessors, (11457), 3293 states have call successors, (3293), 380 states have call predecessors, (3293), 2407 states have return successors, (45164), 5258 states have call predecessors, (45164), 3282 states have call successors, (45164) [2023-02-14 14:08:06,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16588 states to 16588 states and 59914 transitions. [2023-02-14 14:08:06,688 INFO L78 Accepts]: Start accepts. Automaton has 16588 states and 59914 transitions. Word has length 55 [2023-02-14 14:08:06,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 14:08:06,689 INFO L495 AbstractCegarLoop]: Abstraction has 16588 states and 59914 transitions. [2023-02-14 14:08:06,689 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) [2023-02-14 14:08:06,689 INFO L276 IsEmpty]: Start isEmpty. Operand 16588 states and 59914 transitions. [2023-02-14 14:08:06,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2023-02-14 14:08:06,691 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 14:08:06,691 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] [2023-02-14 14:08:06,696 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-02-14 14:08:06,892 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 14:08:06,892 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ackermannErr6ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2023-02-14 14:08:06,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 14:08:06,893 INFO L85 PathProgramCache]: Analyzing trace with hash -1727955375, now seen corresponding path program 2 times [2023-02-14 14:08:06,893 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 14:08:06,893 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1855160541] [2023-02-14 14:08:06,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 14:08:06,893 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 14:08:06,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 14:08:07,008 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2023-02-14 14:08:07,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 14:08:07,060 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-02-14 14:08:07,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 14:08:07,101 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-02-14 14:08:07,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 14:08:07,129 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-02-14 14:08:07,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 14:08:07,162 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2023-02-14 14:08:07,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 14:08:07,193 INFO L134 CoverageAnalysis]: Checked inductivity of 163 backedges. 86 proven. 16 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2023-02-14 14:08:07,194 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 14:08:07,194 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1855160541] [2023-02-14 14:08:07,194 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1855160541] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 14:08:07,194 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1438096792] [2023-02-14 14:08:07,194 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-14 14:08:07,194 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 14:08:07,195 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 14:08:07,196 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) [2023-02-14 14:08:07,198 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-02-14 14:08:07,257 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-14 14:08:07,257 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 14:08:07,259 INFO L263 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 19 conjunts are in the unsatisfiable core [2023-02-14 14:08:07,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 14:08:07,321 INFO L134 CoverageAnalysis]: Checked inductivity of 163 backedges. 75 proven. 22 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2023-02-14 14:08:07,321 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 14:08:08,191 INFO L134 CoverageAnalysis]: Checked inductivity of 163 backedges. 94 proven. 8 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2023-02-14 14:08:08,191 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1438096792] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 14:08:08,192 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 14:08:08,192 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 16] total 32 [2023-02-14 14:08:08,192 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1571230387] [2023-02-14 14:08:08,192 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 14:08:08,192 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-02-14 14:08:08,193 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 14:08:08,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-02-14 14:08:08,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=930, Unknown=0, NotChecked=0, Total=1056 [2023-02-14 14:08:08,194 INFO L87 Difference]: Start difference. First operand 16588 states and 59914 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) [2023-02-14 14:08:09,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 14:08:09,936 INFO L93 Difference]: Finished difference Result 25421 states and 94291 transitions. [2023-02-14 14:08:09,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-02-14 14:08:09,938 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 [2023-02-14 14:08:09,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 14:08:10,003 INFO L225 Difference]: With dead ends: 25421 [2023-02-14 14:08:10,003 INFO L226 Difference]: Without dead ends: 10188 [2023-02-14 14:08:10,429 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 156 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 504 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=667, Invalid=2639, Unknown=0, NotChecked=0, Total=3306 [2023-02-14 14:08:10,430 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 128 mSDsluCounter, 416 mSDsCounter, 0 mSdLazyCounter, 892 mSolverCounterSat, 112 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 453 SdHoareTripleChecker+Invalid, 1004 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 112 IncrementalHoareTripleChecker+Valid, 892 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-14 14:08:10,430 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [128 Valid, 453 Invalid, 1004 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [112 Valid, 892 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-14 14:08:10,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10188 states. [2023-02-14 14:08:11,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10188 to 9700. [2023-02-14 14:08:11,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9700 states, 6737 states have (on average 1.078076295086834) internal successors, (7263), 6944 states have internal predecessors, (7263), 1900 states have call successors, (1900), 404 states have call predecessors, (1900), 1059 states have return successors, (6461), 2351 states have call predecessors, (6461), 1892 states have call successors, (6461) [2023-02-14 14:08:11,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9700 states to 9700 states and 15624 transitions. [2023-02-14 14:08:11,286 INFO L78 Accepts]: Start accepts. Automaton has 9700 states and 15624 transitions. Word has length 80 [2023-02-14 14:08:11,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 14:08:11,286 INFO L495 AbstractCegarLoop]: Abstraction has 9700 states and 15624 transitions. [2023-02-14 14:08:11,286 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) [2023-02-14 14:08:11,287 INFO L276 IsEmpty]: Start isEmpty. Operand 9700 states and 15624 transitions. [2023-02-14 14:08:11,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2023-02-14 14:08:11,290 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 14:08:11,290 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] [2023-02-14 14:08:11,297 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-02-14 14:08:11,495 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2023-02-14 14:08:11,495 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ackermannErr6ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2023-02-14 14:08:11,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 14:08:11,496 INFO L85 PathProgramCache]: Analyzing trace with hash 1935422832, now seen corresponding path program 3 times [2023-02-14 14:08:11,496 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 14:08:11,496 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [508500752] [2023-02-14 14:08:11,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 14:08:11,496 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 14:08:11,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 14:08:11,629 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-02-14 14:08:11,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 14:08:11,654 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-02-14 14:08:11,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 14:08:11,686 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 62 proven. 77 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-02-14 14:08:11,686 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 14:08:11,686 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [508500752] [2023-02-14 14:08:11,686 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [508500752] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 14:08:11,686 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1026163757] [2023-02-14 14:08:11,687 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-14 14:08:11,687 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 14:08:11,687 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 14:08:11,688 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) [2023-02-14 14:08:11,691 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-02-14 14:08:11,754 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2023-02-14 14:08:11,754 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 14:08:11,755 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 17 conjunts are in the unsatisfiable core [2023-02-14 14:08:11,756 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 14:08:11,846 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 60 proven. 79 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-02-14 14:08:11,846 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 14:08:12,194 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 64 proven. 75 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-02-14 14:08:12,194 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1026163757] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 14:08:12,194 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 14:08:12,194 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 33 [2023-02-14 14:08:12,195 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [332126191] [2023-02-14 14:08:12,195 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 14:08:12,195 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-02-14 14:08:12,195 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 14:08:12,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-02-14 14:08:12,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=949, Unknown=0, NotChecked=0, Total=1122 [2023-02-14 14:08:12,196 INFO L87 Difference]: Start difference. First operand 9700 states and 15624 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) [2023-02-14 14:08:13,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 14:08:13,404 INFO L93 Difference]: Finished difference Result 10351 states and 16622 transitions. [2023-02-14 14:08:13,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-02-14 14:08:13,405 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 [2023-02-14 14:08:13,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 14:08:13,442 INFO L225 Difference]: With dead ends: 10351 [2023-02-14 14:08:13,443 INFO L226 Difference]: Without dead ends: 10350 [2023-02-14 14:08:13,448 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 127 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 464 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=573, Invalid=1977, Unknown=0, NotChecked=0, Total=2550 [2023-02-14 14:08:13,449 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 275 mSDsluCounter, 216 mSDsCounter, 0 mSdLazyCounter, 471 mSolverCounterSat, 249 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 275 SdHoareTripleChecker+Valid, 247 SdHoareTripleChecker+Invalid, 720 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 249 IncrementalHoareTripleChecker+Valid, 471 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-14 14:08:13,449 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [275 Valid, 247 Invalid, 720 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [249 Valid, 471 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-14 14:08:13,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10350 states. [2023-02-14 14:08:14,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10350 to 9808. [2023-02-14 14:08:14,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9808 states, 6809 states have (on average 1.0734322220590395) internal successors, (7309), 7016 states have internal predecessors, (7309), 1900 states have call successors, (1900), 404 states have call predecessors, (1900), 1095 states have return successors, (6555), 2387 states have call predecessors, (6555), 1892 states have call successors, (6555) [2023-02-14 14:08:14,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9808 states to 9808 states and 15764 transitions. [2023-02-14 14:08:14,356 INFO L78 Accepts]: Start accepts. Automaton has 9808 states and 15764 transitions. Word has length 68 [2023-02-14 14:08:14,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 14:08:14,357 INFO L495 AbstractCegarLoop]: Abstraction has 9808 states and 15764 transitions. [2023-02-14 14:08:14,357 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) [2023-02-14 14:08:14,357 INFO L276 IsEmpty]: Start isEmpty. Operand 9808 states and 15764 transitions. [2023-02-14 14:08:14,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2023-02-14 14:08:14,361 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 14:08:14,362 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] [2023-02-14 14:08:14,369 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-02-14 14:08:14,569 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 14:08:14,570 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2023-02-14 14:08:14,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 14:08:14,570 INFO L85 PathProgramCache]: Analyzing trace with hash -2007669540, now seen corresponding path program 2 times [2023-02-14 14:08:14,571 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 14:08:14,571 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1441026452] [2023-02-14 14:08:14,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 14:08:14,571 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 14:08:14,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 14:08:14,621 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2023-02-14 14:08:14,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 14:08:14,650 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-02-14 14:08:14,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 14:08:14,702 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-02-14 14:08:14,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 14:08:14,741 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-02-14 14:08:14,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 14:08:14,769 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-02-14 14:08:14,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 14:08:14,773 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2023-02-14 14:08:14,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 14:08:14,775 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2023-02-14 14:08:14,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 14:08:14,778 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 101 proven. 28 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2023-02-14 14:08:14,778 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 14:08:14,778 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1441026452] [2023-02-14 14:08:14,779 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1441026452] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 14:08:14,779 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [717825313] [2023-02-14 14:08:14,779 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-14 14:08:14,779 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 14:08:14,779 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 14:08:14,780 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) [2023-02-14 14:08:14,784 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-02-14 14:08:14,857 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-14 14:08:14,857 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 14:08:14,858 INFO L263 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 7 conjunts are in the unsatisfiable core [2023-02-14 14:08:14,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 14:08:14,920 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 103 proven. 15 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2023-02-14 14:08:14,920 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 14:08:15,251 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 103 proven. 26 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2023-02-14 14:08:15,252 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [717825313] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 14:08:15,252 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 14:08:15,252 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 8] total 14 [2023-02-14 14:08:15,252 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [665224972] [2023-02-14 14:08:15,252 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 14:08:15,253 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-02-14 14:08:15,253 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 14:08:15,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-02-14 14:08:15,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2023-02-14 14:08:15,254 INFO L87 Difference]: Start difference. First operand 9808 states and 15764 transitions. Second operand has 14 states, 14 states have (on average 6.0) internal successors, (84), 14 states have internal predecessors, (84), 12 states have call successors, (14), 2 states have call predecessors, (14), 7 states have return successors, (14), 6 states have call predecessors, (14), 11 states have call successors, (14) [2023-02-14 14:08:16,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 14:08:16,141 INFO L93 Difference]: Finished difference Result 18920 states and 34325 transitions. [2023-02-14 14:08:16,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-02-14 14:08:16,142 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 6.0) internal successors, (84), 14 states have internal predecessors, (84), 12 states have call successors, (14), 2 states have call predecessors, (14), 7 states have return successors, (14), 6 states have call predecessors, (14), 11 states have call successors, (14) Word has length 89 [2023-02-14 14:08:16,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 14:08:16,197 INFO L225 Difference]: With dead ends: 18920 [2023-02-14 14:08:16,197 INFO L226 Difference]: Without dead ends: 10752 [2023-02-14 14:08:16,246 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 184 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=112, Invalid=230, Unknown=0, NotChecked=0, Total=342 [2023-02-14 14:08:16,246 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 32 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 139 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 158 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 139 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-14 14:08:16,247 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 112 Invalid, 158 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 139 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-14 14:08:16,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10752 states. [2023-02-14 14:08:17,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10752 to 9802. [2023-02-14 14:08:17,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9802 states, 6806 states have (on average 1.0734645900675874) internal successors, (7306), 7013 states have internal predecessors, (7306), 1897 states have call successors, (1897), 404 states have call predecessors, (1897), 1095 states have return successors, (6475), 2384 states have call predecessors, (6475), 1862 states have call successors, (6475) [2023-02-14 14:08:17,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9802 states to 9802 states and 15678 transitions. [2023-02-14 14:08:17,151 INFO L78 Accepts]: Start accepts. Automaton has 9802 states and 15678 transitions. Word has length 89 [2023-02-14 14:08:17,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 14:08:17,151 INFO L495 AbstractCegarLoop]: Abstraction has 9802 states and 15678 transitions. [2023-02-14 14:08:17,151 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 6.0) internal successors, (84), 14 states have internal predecessors, (84), 12 states have call successors, (14), 2 states have call predecessors, (14), 7 states have return successors, (14), 6 states have call predecessors, (14), 11 states have call successors, (14) [2023-02-14 14:08:17,152 INFO L276 IsEmpty]: Start isEmpty. Operand 9802 states and 15678 transitions. [2023-02-14 14:08:17,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2023-02-14 14:08:17,156 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 14:08:17,157 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] [2023-02-14 14:08:17,164 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-02-14 14:08:17,364 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 14:08:17,365 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2023-02-14 14:08:17,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 14:08:17,365 INFO L85 PathProgramCache]: Analyzing trace with hash -1307053986, now seen corresponding path program 3 times [2023-02-14 14:08:17,365 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 14:08:17,365 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1789430205] [2023-02-14 14:08:17,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 14:08:17,365 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 14:08:17,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 14:08:17,434 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-02-14 14:08:17,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 14:08:17,493 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-02-14 14:08:17,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 14:08:17,535 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-02-14 14:08:17,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 14:08:17,574 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-02-14 14:08:17,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 14:08:17,610 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-02-14 14:08:17,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 14:08:17,630 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-02-14 14:08:17,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 14:08:17,650 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2023-02-14 14:08:17,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 14:08:17,654 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2023-02-14 14:08:17,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 14:08:17,664 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2023-02-14 14:08:17,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 14:08:17,671 INFO L134 CoverageAnalysis]: Checked inductivity of 266 backedges. 117 proven. 51 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2023-02-14 14:08:17,672 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 14:08:17,672 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1789430205] [2023-02-14 14:08:17,672 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1789430205] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 14:08:17,672 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [817817296] [2023-02-14 14:08:17,672 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-14 14:08:17,673 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 14:08:17,673 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 14:08:17,674 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) [2023-02-14 14:08:17,676 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-02-14 14:08:17,749 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2023-02-14 14:08:17,749 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 14:08:17,750 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 12 conjunts are in the unsatisfiable core [2023-02-14 14:08:17,752 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 14:08:17,836 INFO L134 CoverageAnalysis]: Checked inductivity of 266 backedges. 153 proven. 26 refuted. 0 times theorem prover too weak. 87 trivial. 0 not checked. [2023-02-14 14:08:17,837 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 14:08:18,560 INFO L134 CoverageAnalysis]: Checked inductivity of 266 backedges. 123 proven. 57 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2023-02-14 14:08:18,561 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [817817296] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 14:08:18,561 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 14:08:18,561 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 11] total 17 [2023-02-14 14:08:18,561 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1792253676] [2023-02-14 14:08:18,561 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 14:08:18,561 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-02-14 14:08:18,561 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 14:08:18,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-02-14 14:08:18,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=202, Unknown=0, NotChecked=0, Total=272 [2023-02-14 14:08:18,562 INFO L87 Difference]: Start difference. First operand 9802 states and 15678 transitions. Second operand has 17 states, 17 states have (on average 4.9411764705882355) internal successors, (84), 17 states have internal predecessors, (84), 9 states have call successors, (14), 2 states have call predecessors, (14), 7 states have return successors, (17), 5 states have call predecessors, (17), 9 states have call successors, (17) [2023-02-14 14:08:19,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 14:08:19,684 INFO L93 Difference]: Finished difference Result 20475 states and 41580 transitions. [2023-02-14 14:08:19,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-02-14 14:08:19,684 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.9411764705882355) internal successors, (84), 17 states have internal predecessors, (84), 9 states have call successors, (14), 2 states have call predecessors, (14), 7 states have return successors, (17), 5 states have call predecessors, (17), 9 states have call successors, (17) Word has length 100 [2023-02-14 14:08:19,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 14:08:19,758 INFO L225 Difference]: With dead ends: 20475 [2023-02-14 14:08:19,759 INFO L226 Difference]: Without dead ends: 12341 [2023-02-14 14:08:19,824 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 208 SyntacticMatches, 6 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=124, Invalid=296, Unknown=0, NotChecked=0, Total=420 [2023-02-14 14:08:19,825 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 43 mSDsluCounter, 109 mSDsCounter, 0 mSdLazyCounter, 175 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 144 SdHoareTripleChecker+Invalid, 218 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 175 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-14 14:08:19,825 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 144 Invalid, 218 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 175 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-14 14:08:19,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12341 states. [2023-02-14 14:08:20,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12341 to 11980. [2023-02-14 14:08:20,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11980 states, 8084 states have (on average 1.053686293913904) internal successors, (8518), 8271 states have internal predecessors, (8518), 2417 states have call successors, (2417), 424 states have call predecessors, (2417), 1475 states have return successors, (8115), 3284 states have call predecessors, (8115), 2362 states have call successors, (8115) [2023-02-14 14:08:20,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11980 states to 11980 states and 19050 transitions. [2023-02-14 14:08:20,929 INFO L78 Accepts]: Start accepts. Automaton has 11980 states and 19050 transitions. Word has length 100 [2023-02-14 14:08:20,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 14:08:20,929 INFO L495 AbstractCegarLoop]: Abstraction has 11980 states and 19050 transitions. [2023-02-14 14:08:20,930 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 4.9411764705882355) internal successors, (84), 17 states have internal predecessors, (84), 9 states have call successors, (14), 2 states have call predecessors, (14), 7 states have return successors, (17), 5 states have call predecessors, (17), 9 states have call successors, (17) [2023-02-14 14:08:20,930 INFO L276 IsEmpty]: Start isEmpty. Operand 11980 states and 19050 transitions. [2023-02-14 14:08:20,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2023-02-14 14:08:20,936 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 14:08:20,936 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] [2023-02-14 14:08:20,947 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2023-02-14 14:08:21,141 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 14:08:21,141 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ackermannErr6ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2023-02-14 14:08:21,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 14:08:21,142 INFO L85 PathProgramCache]: Analyzing trace with hash 1104252262, now seen corresponding path program 3 times [2023-02-14 14:08:21,142 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 14:08:21,142 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1784384018] [2023-02-14 14:08:21,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 14:08:21,142 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 14:08:21,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 14:08:21,309 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-02-14 14:08:21,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 14:08:21,353 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-02-14 14:08:21,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 14:08:21,379 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-02-14 14:08:21,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 14:08:21,415 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2023-02-14 14:08:21,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 14:08:21,446 INFO L134 CoverageAnalysis]: Checked inductivity of 227 backedges. 120 proven. 86 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-02-14 14:08:21,446 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 14:08:21,447 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1784384018] [2023-02-14 14:08:21,447 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1784384018] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 14:08:21,447 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [459444820] [2023-02-14 14:08:21,447 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-14 14:08:21,447 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 14:08:21,447 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 14:08:21,449 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) [2023-02-14 14:08:21,476 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-02-14 14:08:21,537 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2023-02-14 14:08:21,537 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 14:08:21,538 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 31 conjunts are in the unsatisfiable core [2023-02-14 14:08:21,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 14:08:21,663 INFO L134 CoverageAnalysis]: Checked inductivity of 227 backedges. 113 proven. 41 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2023-02-14 14:08:21,663 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 14:08:21,823 INFO L134 CoverageAnalysis]: Checked inductivity of 227 backedges. 142 proven. 13 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2023-02-14 14:08:21,823 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [459444820] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 14:08:21,823 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 14:08:21,824 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 7, 8] total 29 [2023-02-14 14:08:21,824 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1059812381] [2023-02-14 14:08:21,824 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 14:08:21,825 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-02-14 14:08:21,825 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 14:08:21,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-02-14 14:08:21,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=723, Unknown=0, NotChecked=0, Total=812 [2023-02-14 14:08:21,826 INFO L87 Difference]: Start difference. First operand 11980 states and 19050 transitions. Second operand has 29 states, 29 states have (on average 3.6551724137931036) internal successors, (106), 22 states have internal predecessors, (106), 11 states have call successors, (15), 7 states have call predecessors, (15), 7 states have return successors, (10), 9 states have call predecessors, (10), 4 states have call successors, (10) [2023-02-14 14:08:23,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 14:08:23,667 INFO L93 Difference]: Finished difference Result 20826 states and 35598 transitions. [2023-02-14 14:08:23,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2023-02-14 14:08:23,668 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 [2023-02-14 14:08:23,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 14:08:23,721 INFO L225 Difference]: With dead ends: 20826 [2023-02-14 14:08:23,721 INFO L226 Difference]: Without dead ends: 10351 [2023-02-14 14:08:23,783 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 246 GetRequests, 181 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 774 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=983, Invalid=3439, Unknown=0, NotChecked=0, Total=4422 [2023-02-14 14:08:23,783 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 240 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 918 mSolverCounterSat, 245 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 240 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 1163 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 245 IncrementalHoareTripleChecker+Valid, 918 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-02-14 14:08:23,785 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [240 Valid, 135 Invalid, 1163 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [245 Valid, 918 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-02-14 14:08:23,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10351 states. [2023-02-14 14:08:24,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10351 to 8751. [2023-02-14 14:08:24,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8751 states, 5978 states have (on average 1.0463365674138507) internal successors, (6255), 6154 states have internal predecessors, (6255), 1711 states have call successors, (1711), 352 states have call predecessors, (1711), 1058 states have return successors, (4097), 2244 states have call predecessors, (4097), 1677 states have call successors, (4097) [2023-02-14 14:08:24,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8751 states to 8751 states and 12063 transitions. [2023-02-14 14:08:24,504 INFO L78 Accepts]: Start accepts. Automaton has 8751 states and 12063 transitions. Word has length 87 [2023-02-14 14:08:24,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 14:08:24,504 INFO L495 AbstractCegarLoop]: Abstraction has 8751 states and 12063 transitions. [2023-02-14 14:08:24,504 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) [2023-02-14 14:08:24,504 INFO L276 IsEmpty]: Start isEmpty. Operand 8751 states and 12063 transitions. [2023-02-14 14:08:24,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2023-02-14 14:08:24,508 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 14:08:24,508 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 11, 11, 11, 10, 10, 10, 1, 1, 1, 1, 1, 1] [2023-02-14 14:08:24,513 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2023-02-14 14:08:24,712 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2023-02-14 14:08:24,713 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ackermannErr6ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2023-02-14 14:08:24,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 14:08:24,713 INFO L85 PathProgramCache]: Analyzing trace with hash -133792040, now seen corresponding path program 3 times [2023-02-14 14:08:24,713 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 14:08:24,713 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [835634475] [2023-02-14 14:08:24,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 14:08:24,713 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 14:08:24,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 14:08:25,073 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 0 proven. 420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 14:08:25,073 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 14:08:25,073 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [835634475] [2023-02-14 14:08:25,073 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [835634475] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 14:08:25,073 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1975229515] [2023-02-14 14:08:25,073 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-14 14:08:25,073 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 14:08:25,073 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 14:08:25,075 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) [2023-02-14 14:08:25,077 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-02-14 14:08:25,155 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2023-02-14 14:08:25,155 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 14:08:25,157 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 24 conjunts are in the unsatisfiable core [2023-02-14 14:08:25,158 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 14:08:25,278 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 0 proven. 420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 14:08:25,279 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 14:08:25,768 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 0 proven. 420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 14:08:25,768 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1975229515] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 14:08:25,768 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 14:08:25,769 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 47 [2023-02-14 14:08:25,769 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2065838271] [2023-02-14 14:08:25,769 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 14:08:25,769 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2023-02-14 14:08:25,769 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 14:08:25,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2023-02-14 14:08:25,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=556, Invalid=1700, Unknown=0, NotChecked=0, Total=2256 [2023-02-14 14:08:25,771 INFO L87 Difference]: Start difference. First operand 8751 states and 12063 transitions. Second operand has 48 states, 45 states have (on average 3.488888888888889) internal successors, (157), 26 states have internal predecessors, (157), 22 states have call successors, (22), 22 states have call predecessors, (22), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 14:08:28,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 14:08:28,189 INFO L93 Difference]: Finished difference Result 15928 states and 22083 transitions. [2023-02-14 14:08:28,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2023-02-14 14:08:28,190 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 45 states have (on average 3.488888888888889) internal successors, (157), 26 states have internal predecessors, (157), 22 states have call successors, (22), 22 states have call predecessors, (22), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 91 [2023-02-14 14:08:28,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 14:08:28,245 INFO L225 Difference]: With dead ends: 15928 [2023-02-14 14:08:28,245 INFO L226 Difference]: Without dead ends: 15927 [2023-02-14 14:08:28,256 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 248 GetRequests, 158 SyntacticMatches, 1 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1830 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=2534, Invalid=5656, Unknown=0, NotChecked=0, Total=8190 [2023-02-14 14:08:28,256 INFO L413 NwaCegarLoop]: 67 mSDtfsCounter, 866 mSDsluCounter, 629 mSDsCounter, 0 mSdLazyCounter, 940 mSolverCounterSat, 474 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 870 SdHoareTripleChecker+Valid, 696 SdHoareTripleChecker+Invalid, 1414 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 474 IncrementalHoareTripleChecker+Valid, 940 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-02-14 14:08:28,257 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [870 Valid, 696 Invalid, 1414 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [474 Valid, 940 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-02-14 14:08:28,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15927 states. [2023-02-14 14:08:29,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15927 to 15927. [2023-02-14 14:08:29,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15927 states, 10802 states have (on average 1.0456396963525274) internal successors, (11295), 11194 states have internal predecessors, (11295), 3103 states have call successors, (3103), 568 states have call predecessors, (3103), 2018 states have return successors, (7673), 4164 states have call predecessors, (7673), 3069 states have call successors, (7673) [2023-02-14 14:08:29,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15927 states to 15927 states and 22071 transitions. [2023-02-14 14:08:29,339 INFO L78 Accepts]: Start accepts. Automaton has 15927 states and 22071 transitions. Word has length 91 [2023-02-14 14:08:29,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 14:08:29,342 INFO L495 AbstractCegarLoop]: Abstraction has 15927 states and 22071 transitions. [2023-02-14 14:08:29,342 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 45 states have (on average 3.488888888888889) internal successors, (157), 26 states have internal predecessors, (157), 22 states have call successors, (22), 22 states have call predecessors, (22), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 14:08:29,342 INFO L276 IsEmpty]: Start isEmpty. Operand 15927 states and 22071 transitions. [2023-02-14 14:08:29,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2023-02-14 14:08:29,345 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 14:08:29,345 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] [2023-02-14 14:08:29,350 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2023-02-14 14:08:29,549 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2023-02-14 14:08:29,550 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2023-02-14 14:08:29,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 14:08:29,550 INFO L85 PathProgramCache]: Analyzing trace with hash 1765664819, now seen corresponding path program 4 times [2023-02-14 14:08:29,550 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 14:08:29,550 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [950101901] [2023-02-14 14:08:29,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 14:08:29,551 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 14:08:29,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 14:08:29,666 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-02-14 14:08:29,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 14:08:29,749 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-02-14 14:08:29,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 14:08:29,811 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-02-14 14:08:29,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 14:08:29,856 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-02-14 14:08:29,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 14:08:29,881 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-02-14 14:08:29,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 14:08:29,915 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2023-02-14 14:08:29,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 14:08:29,945 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2023-02-14 14:08:29,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 14:08:29,953 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2023-02-14 14:08:29,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 14:08:29,962 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 51 proven. 69 refuted. 0 times theorem prover too weak. 101 trivial. 0 not checked. [2023-02-14 14:08:29,963 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 14:08:29,963 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [950101901] [2023-02-14 14:08:29,963 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [950101901] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 14:08:29,963 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1457470162] [2023-02-14 14:08:29,963 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-14 14:08:29,963 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 14:08:29,964 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 14:08:29,965 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) [2023-02-14 14:08:29,967 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-02-14 14:08:30,048 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-14 14:08:30,049 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 14:08:30,050 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 27 conjunts are in the unsatisfiable core [2023-02-14 14:08:30,052 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 14:08:30,128 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 34 proven. 71 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2023-02-14 14:08:30,128 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 14:08:31,532 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 42 proven. 93 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2023-02-14 14:08:31,532 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1457470162] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 14:08:31,532 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 14:08:31,532 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17, 23] total 42 [2023-02-14 14:08:31,532 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [948302621] [2023-02-14 14:08:31,533 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 14:08:31,533 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2023-02-14 14:08:31,533 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 14:08:31,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2023-02-14 14:08:31,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=207, Invalid=1599, Unknown=0, NotChecked=0, Total=1806 [2023-02-14 14:08:31,534 INFO L87 Difference]: Start difference. First operand 15927 states and 22071 transitions. Second operand has 43 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 33 states have internal predecessors, (80), 9 states have call successors, (11), 3 states have call predecessors, (11), 14 states have return successors, (17), 16 states have call predecessors, (17), 7 states have call successors, (17) [2023-02-14 14:08:37,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 14:08:37,294 INFO L93 Difference]: Finished difference Result 45665 states and 72940 transitions. [2023-02-14 14:08:37,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 143 states. [2023-02-14 14:08:37,294 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 [2023-02-14 14:08:37,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 14:08:37,496 INFO L225 Difference]: With dead ends: 45665 [2023-02-14 14:08:37,497 INFO L226 Difference]: Without dead ends: 44563 [2023-02-14 14:08:37,533 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 356 GetRequests, 177 SyntacticMatches, 0 SemanticMatches, 179 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12271 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=5454, Invalid=27126, Unknown=0, NotChecked=0, Total=32580 [2023-02-14 14:08:37,533 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 301 mSDsluCounter, 348 mSDsCounter, 0 mSdLazyCounter, 1615 mSolverCounterSat, 758 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 312 SdHoareTripleChecker+Valid, 370 SdHoareTripleChecker+Invalid, 2373 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 758 IncrementalHoareTripleChecker+Valid, 1615 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-02-14 14:08:37,533 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [312 Valid, 370 Invalid, 2373 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [758 Valid, 1615 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-02-14 14:08:37,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44563 states. [2023-02-14 14:08:40,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44563 to 28637. [2023-02-14 14:08:40,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28637 states, 18550 states have (on average 1.0279784366576818) internal successors, (19069), 18925 states have internal predecessors, (19069), 5846 states have call successors, (5846), 676 states have call predecessors, (5846), 4237 states have return successors, (19630), 9035 states have call predecessors, (19630), 5792 states have call successors, (19630) [2023-02-14 14:08:40,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28637 states to 28637 states and 44545 transitions. [2023-02-14 14:08:40,273 INFO L78 Accepts]: Start accepts. Automaton has 28637 states and 44545 transitions. Word has length 91 [2023-02-14 14:08:40,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 14:08:40,274 INFO L495 AbstractCegarLoop]: Abstraction has 28637 states and 44545 transitions. [2023-02-14 14:08:40,274 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) [2023-02-14 14:08:40,274 INFO L276 IsEmpty]: Start isEmpty. Operand 28637 states and 44545 transitions. [2023-02-14 14:08:40,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2023-02-14 14:08:40,285 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 14:08:40,286 INFO L195 NwaCegarLoop]: trace histogram [20, 20, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1] [2023-02-14 14:08:40,290 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2023-02-14 14:08:40,490 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2023-02-14 14:08:40,490 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ackermannErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2023-02-14 14:08:40,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 14:08:40,491 INFO L85 PathProgramCache]: Analyzing trace with hash 951429890, now seen corresponding path program 2 times [2023-02-14 14:08:40,491 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 14:08:40,491 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [253585900] [2023-02-14 14:08:40,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 14:08:40,491 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 14:08:40,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 14:08:40,969 INFO L134 CoverageAnalysis]: Checked inductivity of 894 backedges. 0 proven. 867 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2023-02-14 14:08:40,969 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 14:08:40,969 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [253585900] [2023-02-14 14:08:40,969 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [253585900] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 14:08:40,969 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1392394414] [2023-02-14 14:08:40,969 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-14 14:08:40,969 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 14:08:40,969 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 14:08:40,970 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) [2023-02-14 14:08:40,972 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-02-14 14:08:41,067 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-14 14:08:41,068 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 14:08:41,069 INFO L263 TraceCheckSpWp]: Trace formula consists of 342 conjuncts, 42 conjunts are in the unsatisfiable core [2023-02-14 14:08:41,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 14:08:41,238 INFO L134 CoverageAnalysis]: Checked inductivity of 894 backedges. 0 proven. 867 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2023-02-14 14:08:41,238 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 14:08:41,799 INFO L134 CoverageAnalysis]: Checked inductivity of 894 backedges. 0 proven. 867 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2023-02-14 14:08:41,800 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1392394414] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 14:08:41,800 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 14:08:41,800 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 47 [2023-02-14 14:08:41,800 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [659672439] [2023-02-14 14:08:41,800 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 14:08:41,800 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2023-02-14 14:08:41,800 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 14:08:41,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2023-02-14 14:08:41,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=556, Invalid=1700, Unknown=0, NotChecked=0, Total=2256 [2023-02-14 14:08:41,801 INFO L87 Difference]: Start difference. First operand 28637 states and 44545 transitions. Second operand has 48 states, 47 states have (on average 4.340425531914893) internal successors, (204), 26 states have internal predecessors, (204), 22 states have call successors, (40), 22 states have call predecessors, (40), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 14:08:47,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 14:08:47,346 INFO L93 Difference]: Finished difference Result 64750 states and 101363 transitions. [2023-02-14 14:08:47,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2023-02-14 14:08:47,347 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 47 states have (on average 4.340425531914893) internal successors, (204), 26 states have internal predecessors, (204), 22 states have call successors, (40), 22 states have call predecessors, (40), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 141 [2023-02-14 14:08:47,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 14:08:47,591 INFO L225 Difference]: With dead ends: 64750 [2023-02-14 14:08:47,591 INFO L226 Difference]: Without dead ends: 64749 [2023-02-14 14:08:47,618 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 365 GetRequests, 275 SyntacticMatches, 1 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1830 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=2534, Invalid=5656, Unknown=0, NotChecked=0, Total=8190 [2023-02-14 14:08:47,619 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 2561 mSDsluCounter, 511 mSDsCounter, 0 mSdLazyCounter, 1036 mSolverCounterSat, 941 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2564 SdHoareTripleChecker+Valid, 538 SdHoareTripleChecker+Invalid, 1977 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 941 IncrementalHoareTripleChecker+Valid, 1036 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-02-14 14:08:47,619 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2564 Valid, 538 Invalid, 1977 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [941 Valid, 1036 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-02-14 14:08:47,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64749 states. [2023-02-14 14:08:52,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64749 to 64697. [2023-02-14 14:08:52,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64697 states, 41998 states have (on average 1.0286442211533882) internal successors, (43201), 42865 states have internal predecessors, (43201), 13190 states have call successors, (13190), 1564 states have call predecessors, (13190), 9505 states have return successors, (44950), 20267 states have call predecessors, (44950), 13076 states have call successors, (44950) [2023-02-14 14:08:53,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64697 states to 64697 states and 101341 transitions. [2023-02-14 14:08:53,182 INFO L78 Accepts]: Start accepts. Automaton has 64697 states and 101341 transitions. Word has length 141 [2023-02-14 14:08:53,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 14:08:53,182 INFO L495 AbstractCegarLoop]: Abstraction has 64697 states and 101341 transitions. [2023-02-14 14:08:53,182 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 47 states have (on average 4.340425531914893) internal successors, (204), 26 states have internal predecessors, (204), 22 states have call successors, (40), 22 states have call predecessors, (40), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 14:08:53,183 INFO L276 IsEmpty]: Start isEmpty. Operand 64697 states and 101341 transitions. [2023-02-14 14:08:53,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 275 [2023-02-14 14:08:53,206 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 14:08:53,206 INFO L195 NwaCegarLoop]: trace histogram [31, 24, 20, 20, 20, 20, 19, 19, 17, 7, 7, 7, 7, 7, 7, 6, 6, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1] [2023-02-14 14:08:53,216 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2023-02-14 14:08:53,411 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 14:08:53,411 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ackermannErr7ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2023-02-14 14:08:53,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 14:08:53,412 INFO L85 PathProgramCache]: Analyzing trace with hash -76175906, now seen corresponding path program 1 times [2023-02-14 14:08:53,412 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 14:08:53,412 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1924721777] [2023-02-14 14:08:53,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 14:08:53,412 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 14:08:53,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 14:08:53,722 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2023-02-14 14:08:53,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 14:08:53,871 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-02-14 14:08:53,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 14:08:53,984 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-02-14 14:08:53,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 14:08:54,016 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-02-14 14:08:54,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 14:08:54,043 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-02-14 14:08:54,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 14:08:54,061 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-02-14 14:08:54,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 14:08:54,085 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2023-02-14 14:08:54,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 14:08:54,107 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2023-02-14 14:08:54,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 14:08:54,170 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-02-14 14:08:54,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 14:08:54,212 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-02-14 14:08:54,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 14:08:54,245 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-02-14 14:08:54,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 14:08:54,268 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-02-14 14:08:54,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 14:08:54,298 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-02-14 14:08:54,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 14:08:54,301 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2023-02-14 14:08:54,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 14:08:54,303 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2023-02-14 14:08:54,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 14:08:54,304 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2023-02-14 14:08:54,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 14:08:54,306 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2023-02-14 14:08:54,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 14:08:54,310 INFO L134 CoverageAnalysis]: Checked inductivity of 2532 backedges. 843 proven. 224 refuted. 0 times theorem prover too weak. 1465 trivial. 0 not checked. [2023-02-14 14:08:54,310 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 14:08:54,310 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1924721777] [2023-02-14 14:08:54,310 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1924721777] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 14:08:54,310 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [291824082] [2023-02-14 14:08:54,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 14:08:54,310 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 14:08:54,311 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 14:08:54,312 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-14 14:08:54,314 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-02-14 14:08:54,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 14:08:54,477 INFO L263 TraceCheckSpWp]: Trace formula consists of 632 conjuncts, 25 conjunts are in the unsatisfiable core [2023-02-14 14:08:54,480 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 14:08:54,603 INFO L134 CoverageAnalysis]: Checked inductivity of 2532 backedges. 832 proven. 216 refuted. 0 times theorem prover too weak. 1484 trivial. 0 not checked. [2023-02-14 14:08:54,604 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 14:08:56,534 INFO L134 CoverageAnalysis]: Checked inductivity of 2532 backedges. 848 proven. 263 refuted. 0 times theorem prover too weak. 1421 trivial. 0 not checked. [2023-02-14 14:08:56,534 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [291824082] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 14:08:56,534 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 14:08:56,535 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 16, 21] total 28 [2023-02-14 14:08:56,535 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1109396327] [2023-02-14 14:08:56,535 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 14:08:56,536 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-02-14 14:08:56,536 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 14:08:56,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-02-14 14:08:56,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=638, Unknown=0, NotChecked=0, Total=756 [2023-02-14 14:08:56,537 INFO L87 Difference]: Start difference. First operand 64697 states and 101341 transitions. Second operand has 28 states, 28 states have (on average 4.464285714285714) internal successors, (125), 25 states have internal predecessors, (125), 16 states have call successors, (18), 2 states have call predecessors, (18), 14 states have return successors, (29), 12 states have call predecessors, (29), 15 states have call successors, (29)