./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/recursive-simple/fibo_5-1.c --full-output --witness-type correctness_witness --validate ../results/automizer-verification-files/SV-COMP24_unreach-call/fibo_5-1.yml/witness-2.1.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 5189fb62 Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/certificate-witnesses-artifact/automizer/data/config -Xmx15G -Xms4m -jar /storage/repos/certificate-witnesses-artifact/automizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/certificate-witnesses-artifact/automizer/data -tc /storage/repos/certificate-witnesses-artifact/automizer/config/AutomizerReachWitnessValidation.xml -i ../sv-benchmarks/c/recursive-simple/fibo_5-1.c ../results/automizer-verification-files/SV-COMP24_unreach-call/fibo_5-1.yml/witness-2.1.yml -s /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.positions.where.we.compute.the.hoare.annotation None --- Real Ultimate output --- This is Ultimate 0.2.4-dev-5189fb6-m [2024-09-13 06:26:20,824 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-09-13 06:26:20,877 INFO L114 SettingsManager]: Loading settings from /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-09-13 06:26:20,881 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-09-13 06:26:20,882 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-09-13 06:26:20,908 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-09-13 06:26:20,908 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-09-13 06:26:20,909 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-09-13 06:26:20,910 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-09-13 06:26:20,910 INFO L153 SettingsManager]: * Use memory slicer=true [2024-09-13 06:26:20,910 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-09-13 06:26:20,911 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-09-13 06:26:20,911 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-09-13 06:26:20,915 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-09-13 06:26:20,916 INFO L153 SettingsManager]: * Use SBE=true [2024-09-13 06:26:20,916 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-09-13 06:26:20,916 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-09-13 06:26:20,916 INFO L153 SettingsManager]: * sizeof long=4 [2024-09-13 06:26:20,917 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-09-13 06:26:20,917 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-09-13 06:26:20,917 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-09-13 06:26:20,918 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-09-13 06:26:20,918 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-09-13 06:26:20,918 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-09-13 06:26:20,918 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-09-13 06:26:20,918 INFO L153 SettingsManager]: * sizeof long double=12 [2024-09-13 06:26:20,919 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-09-13 06:26:20,919 INFO L153 SettingsManager]: * Use constant arrays=true [2024-09-13 06:26:20,919 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-09-13 06:26:20,919 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-09-13 06:26:20,920 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-09-13 06:26:20,920 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-09-13 06:26:20,920 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-13 06:26:20,920 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-09-13 06:26:20,921 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-09-13 06:26:20,921 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-09-13 06:26:20,922 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-09-13 06:26:20,923 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-09-13 06:26:20,923 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-09-13 06:26:20,923 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-09-13 06:26:20,923 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-09-13 06:26:20,924 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-09-13 06:26:20,925 INFO L153 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/certificate-witnesses-artifact/automizer/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Positions where we compute the Hoare Annotation -> None [2024-09-13 06:26:21,246 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-09-13 06:26:21,278 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-09-13 06:26:21,281 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-09-13 06:26:21,282 INFO L270 PluginConnector]: Initializing CDTParser... [2024-09-13 06:26:21,283 INFO L274 PluginConnector]: CDTParser initialized [2024-09-13 06:26:21,284 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/certificate-witnesses-artifact/automizer/../sv-benchmarks/c/recursive-simple/fibo_5-1.c [2024-09-13 06:26:22,806 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-09-13 06:26:22,974 INFO L384 CDTParser]: Found 1 translation units. [2024-09-13 06:26:22,975 INFO L180 CDTParser]: Scanning /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/recursive-simple/fibo_5-1.c [2024-09-13 06:26:22,984 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/certificate-witnesses-artifact/automizer/data/a66f233e4/670291a05b3f4714aa0d7489a316c880/FLAG82055db05 [2024-09-13 06:26:23,382 INFO L435 CDTParser]: Successfully deleted /storage/repos/certificate-witnesses-artifact/automizer/data/a66f233e4/670291a05b3f4714aa0d7489a316c880 [2024-09-13 06:26:23,384 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-09-13 06:26:23,385 INFO L274 PluginConnector]: Witness Parser initialized [2024-09-13 06:26:23,385 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/certificate-witnesses-artifact/automizer/../results/automizer-verification-files/SV-COMP24_unreach-call/fibo_5-1.yml/witness-2.1.yml [2024-09-13 06:26:23,444 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-09-13 06:26:23,447 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-09-13 06:26:23,450 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-09-13 06:26:23,450 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-09-13 06:26:23,456 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-09-13 06:26:23,457 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.09 06:26:23" (1/2) ... [2024-09-13 06:26:23,460 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5d322c35 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 06:26:23, skipping insertion in model container [2024-09-13 06:26:23,460 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.09 06:26:23" (1/2) ... [2024-09-13 06:26:23,462 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@29697b11 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 06:26:23, skipping insertion in model container [2024-09-13 06:26:23,462 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness-2.1.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 13.09 06:26:23" (2/2) ... [2024-09-13 06:26:23,463 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5d322c35 and model type witness-2.1.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 13.09 06:26:23, skipping insertion in model container [2024-09-13 06:26:23,463 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness-2.1.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 13.09 06:26:23" (2/2) ... [2024-09-13 06:26:23,472 INFO L93 nessWitnessExtractor]: Found the following entries in the witness: [2024-09-13 06:26:23,473 INFO L1541 ArrayList]: Function contract at [L7]: requires null, ensures (((((((((\result == 3) && (4 == \old(n))) || ((2 == \old(n)) && (\result == 1))) || (\old(n) < 1)) || ((3 == \old(n)) && (\result == 2))) || (5 < \old(n))) || ((\result == 1) && (1 == \old(n)))) || ((\result == 5) && (5 == \old(n)))) && ((0 < \old(n)) || (\result == 0))) [2024-09-13 06:26:23,495 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-09-13 06:26:23,659 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/recursive-simple/fibo_5-1.c[740,753] [2024-09-13 06:26:23,665 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-13 06:26:23,676 INFO L200 MainTranslator]: Completed pre-run Start Parsing Global [2024-09-13 06:26:23,713 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/recursive-simple/fibo_5-1.c[740,753] [2024-09-13 06:26:23,714 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-13 06:26:23,728 INFO L204 MainTranslator]: Completed translation [2024-09-13 06:26:23,729 INFO L201 PluginConnector]: Adding new model witness-2.1.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 13.09 06:26:23 WrapperNode [2024-09-13 06:26:23,729 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-09-13 06:26:23,732 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-09-13 06:26:23,732 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-09-13 06:26:23,732 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-09-13 06:26:23,740 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "witness-2.1.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 13.09 06:26:23" (1/1) ... [2024-09-13 06:26:23,747 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "witness-2.1.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 13.09 06:26:23" (1/1) ... [2024-09-13 06:26:23,763 INFO L138 Inliner]: procedures = 13, calls = 10, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 20 [2024-09-13 06:26:23,764 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-09-13 06:26:23,765 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-09-13 06:26:23,765 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-09-13 06:26:23,765 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-09-13 06:26:23,795 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "witness-2.1.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 13.09 06:26:23" (1/1) ... [2024-09-13 06:26:23,796 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "witness-2.1.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 13.09 06:26:23" (1/1) ... [2024-09-13 06:26:23,797 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "witness-2.1.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 13.09 06:26:23" (1/1) ... [2024-09-13 06:26:23,811 WARN L109 MemorySlicer]: Omit memory slicing because it failed with the following exception: Unsupported: Procedure fibo is not part of the Ultimate memory model but has specification other that is not a ModifiesSpecification [2024-09-13 06:26:23,812 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "witness-2.1.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 13.09 06:26:23" (1/1) ... [2024-09-13 06:26:23,812 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "witness-2.1.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 13.09 06:26:23" (1/1) ... [2024-09-13 06:26:23,816 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "witness-2.1.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 13.09 06:26:23" (1/1) ... [2024-09-13 06:26:23,822 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "witness-2.1.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 13.09 06:26:23" (1/1) ... [2024-09-13 06:26:23,827 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "witness-2.1.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 13.09 06:26:23" (1/1) ... [2024-09-13 06:26:23,828 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "witness-2.1.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 13.09 06:26:23" (1/1) ... [2024-09-13 06:26:23,829 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-09-13 06:26:23,831 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-09-13 06:26:23,832 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-09-13 06:26:23,832 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-09-13 06:26:23,833 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "witness-2.1.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 13.09 06:26:23" (1/1) ... [2024-09-13 06:26:23,838 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-13 06:26:23,848 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 06:26:23,869 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/certificate-witnesses-artifact/automizer/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-09-13 06:26:23,872 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-09-13 06:26:23,923 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-09-13 06:26:23,924 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-09-13 06:26:23,925 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-09-13 06:26:23,925 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2024-09-13 06:26:23,925 INFO L130 BoogieDeclarations]: Found specification of procedure fibo [2024-09-13 06:26:23,925 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo [2024-09-13 06:26:24,014 INFO L242 CfgBuilder]: Building ICFG [2024-09-13 06:26:24,018 INFO L268 CfgBuilder]: Building CFG for each procedure with an implementation [2024-09-13 06:26:24,218 INFO L? ?]: Removed 9 outVars from TransFormulas that were not future-live. [2024-09-13 06:26:24,219 INFO L291 CfgBuilder]: Performing block encoding [2024-09-13 06:26:24,242 INFO L313 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-09-13 06:26:24,242 INFO L318 CfgBuilder]: Removed 0 assume(true) statements. [2024-09-13 06:26:24,243 INFO L201 PluginConnector]: Adding new model witness-2.1.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.09 06:26:24 BoogieIcfgContainer [2024-09-13 06:26:24,243 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-09-13 06:26:24,245 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-09-13 06:26:24,246 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-09-13 06:26:24,249 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-09-13 06:26:24,250 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.09 06:26:23" (1/4) ... [2024-09-13 06:26:24,250 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6d9e5c87 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.09 06:26:24, skipping insertion in model container [2024-09-13 06:26:24,251 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness-2.1.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 13.09 06:26:23" (2/4) ... [2024-09-13 06:26:24,252 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6d9e5c87 and model type witness-2.1.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 13.09 06:26:24, skipping insertion in model container [2024-09-13 06:26:24,252 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness-2.1.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 13.09 06:26:23" (3/4) ... [2024-09-13 06:26:24,255 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6d9e5c87 and model type witness-2.1.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 13.09 06:26:24, skipping insertion in model container [2024-09-13 06:26:24,255 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness-2.1.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.09 06:26:24" (4/4) ... [2024-09-13 06:26:24,256 INFO L112 eAbstractionObserver]: Analyzing ICFG fibo_5-1.c [2024-09-13 06:26:24,274 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-09-13 06:26:24,274 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2024-09-13 06:26:24,322 INFO L335 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-09-13 06:26:24,329 INFO L336 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, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=None, 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;@7a3fcb1a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-09-13 06:26:24,329 INFO L337 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2024-09-13 06:26:24,333 INFO L276 IsEmpty]: Start isEmpty. Operand has 18 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 13 states have internal predecessors, (16), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-09-13 06:26:24,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2024-09-13 06:26:24,342 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 06:26:24,342 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2024-09-13 06:26:24,343 INFO L399 AbstractCegarLoop]: === Iteration 1 === Targeting fiboErr0ENSURES_VIOLATIONPOST_CONDITION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, fiboErr0ENSURES_VIOLATIONPOST_CONDITION] === [2024-09-13 06:26:24,348 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 06:26:24,348 INFO L85 PathProgramCache]: Analyzing trace with hash 65647554, now seen corresponding path program 1 times [2024-09-13 06:26:24,357 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 06:26:24,358 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1992334209] [2024-09-13 06:26:24,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 06:26:24,358 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 06:26:24,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:26:24,678 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-13 06:26:24,678 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 06:26:24,679 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1992334209] [2024-09-13 06:26:24,679 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1992334209] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-13 06:26:24,679 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-13 06:26:24,680 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-09-13 06:26:24,682 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1591265588] [2024-09-13 06:26:24,682 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-13 06:26:24,686 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-09-13 06:26:24,687 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 06:26:24,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-09-13 06:26:24,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-09-13 06:26:24,718 INFO L87 Difference]: Start difference. First operand has 18 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 13 states have internal predecessors, (16), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 4 states have internal predecessors, (4), 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) [2024-09-13 06:26:24,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 06:26:24,819 INFO L93 Difference]: Finished difference Result 23 states and 30 transitions. [2024-09-13 06:26:24,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-09-13 06:26:24,822 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 4 states have internal predecessors, (4), 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 5 [2024-09-13 06:26:24,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 06:26:24,830 INFO L225 Difference]: With dead ends: 23 [2024-09-13 06:26:24,830 INFO L226 Difference]: Without dead ends: 21 [2024-09-13 06:26:24,833 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-09-13 06:26:24,838 INFO L434 NwaCegarLoop]: 11 mSDtfsCounter, 7 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-13 06:26:24,839 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 20 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-13 06:26:24,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2024-09-13 06:26:24,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 17. [2024-09-13 06:26:24,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 12 states have internal predecessors, (14), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-09-13 06:26:24,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 20 transitions. [2024-09-13 06:26:24,879 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 20 transitions. Word has length 5 [2024-09-13 06:26:24,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 06:26:24,880 INFO L474 AbstractCegarLoop]: Abstraction has 17 states and 20 transitions. [2024-09-13 06:26:24,880 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 4 states have internal predecessors, (4), 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) [2024-09-13 06:26:24,881 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 20 transitions. [2024-09-13 06:26:24,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2024-09-13 06:26:24,883 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 06:26:24,883 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2024-09-13 06:26:24,883 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-09-13 06:26:24,884 INFO L399 AbstractCegarLoop]: === Iteration 2 === Targeting fiboErr0ENSURES_VIOLATIONPOST_CONDITION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, fiboErr0ENSURES_VIOLATIONPOST_CONDITION] === [2024-09-13 06:26:24,885 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 06:26:24,887 INFO L85 PathProgramCache]: Analyzing trace with hash 2035074950, now seen corresponding path program 1 times [2024-09-13 06:26:24,888 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 06:26:24,888 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1710617972] [2024-09-13 06:26:24,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 06:26:24,888 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 06:26:24,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:26:25,000 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-13 06:26:25,001 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 06:26:25,001 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1710617972] [2024-09-13 06:26:25,002 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1710617972] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-13 06:26:25,002 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-13 06:26:25,002 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-09-13 06:26:25,002 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [579064187] [2024-09-13 06:26:25,002 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-13 06:26:25,003 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-13 06:26:25,003 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 06:26:25,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-13 06:26:25,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-13 06:26:25,005 INFO L87 Difference]: Start difference. First operand 17 states and 20 transitions. Second operand has 5 states, 4 states have (on average 1.25) internal successors, (5), 3 states have internal predecessors, (5), 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) [2024-09-13 06:26:25,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 06:26:25,090 INFO L93 Difference]: Finished difference Result 27 states and 31 transitions. [2024-09-13 06:26:25,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-13 06:26:25,093 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.25) internal successors, (5), 3 states have internal predecessors, (5), 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 6 [2024-09-13 06:26:25,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 06:26:25,095 INFO L225 Difference]: With dead ends: 27 [2024-09-13 06:26:25,095 INFO L226 Difference]: Without dead ends: 27 [2024-09-13 06:26:25,095 INFO L433 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 [2024-09-13 06:26:25,096 INFO L434 NwaCegarLoop]: 14 mSDtfsCounter, 15 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-13 06:26:25,097 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 44 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-13 06:26:25,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2024-09-13 06:26:25,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 26. [2024-09-13 06:26:25,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 18 states have internal predecessors, (21), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2024-09-13 06:26:25,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 31 transitions. [2024-09-13 06:26:25,104 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 31 transitions. Word has length 6 [2024-09-13 06:26:25,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 06:26:25,105 INFO L474 AbstractCegarLoop]: Abstraction has 26 states and 31 transitions. [2024-09-13 06:26:25,105 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.25) internal successors, (5), 3 states have internal predecessors, (5), 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) [2024-09-13 06:26:25,105 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 31 transitions. [2024-09-13 06:26:25,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2024-09-13 06:26:25,105 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 06:26:25,106 INFO L216 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1] [2024-09-13 06:26:25,106 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-09-13 06:26:25,106 INFO L399 AbstractCegarLoop]: === Iteration 3 === Targeting fiboErr0ENSURES_VIOLATIONPOST_CONDITION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, fiboErr0ENSURES_VIOLATIONPOST_CONDITION] === [2024-09-13 06:26:25,106 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 06:26:25,107 INFO L85 PathProgramCache]: Analyzing trace with hash -254199789, now seen corresponding path program 1 times [2024-09-13 06:26:25,107 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 06:26:25,108 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1185361625] [2024-09-13 06:26:25,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 06:26:25,108 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 06:26:25,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:26:25,243 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-13 06:26:25,244 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 06:26:25,244 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1185361625] [2024-09-13 06:26:25,244 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1185361625] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 06:26:25,244 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1712629374] [2024-09-13 06:26:25,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 06:26:25,245 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 06:26:25,245 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 06:26:25,247 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-13 06:26:25,252 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-09-13 06:26:25,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:26:25,309 INFO L262 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-09-13 06:26:25,315 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 06:26:25,372 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-13 06:26:25,373 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 06:26:25,453 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-13 06:26:25,455 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1712629374] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 06:26:25,456 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-13 06:26:25,456 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 11 [2024-09-13 06:26:25,457 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1578392184] [2024-09-13 06:26:25,460 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-13 06:26:25,461 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-09-13 06:26:25,461 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 06:26:25,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-09-13 06:26:25,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2024-09-13 06:26:25,462 INFO L87 Difference]: Start difference. First operand 26 states and 31 transitions. Second operand has 12 states, 10 states have (on average 1.5) internal successors, (15), 7 states have internal predecessors, (15), 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) [2024-09-13 06:26:25,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 06:26:25,744 INFO L93 Difference]: Finished difference Result 57 states and 64 transitions. [2024-09-13 06:26:25,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-09-13 06:26:25,745 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 1.5) internal successors, (15), 7 states have internal predecessors, (15), 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 10 [2024-09-13 06:26:25,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 06:26:25,746 INFO L225 Difference]: With dead ends: 57 [2024-09-13 06:26:25,746 INFO L226 Difference]: Without dead ends: 57 [2024-09-13 06:26:25,747 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2024-09-13 06:26:25,748 INFO L434 NwaCegarLoop]: 24 mSDtfsCounter, 58 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 121 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 144 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-13 06:26:25,748 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [59 Valid, 82 Invalid, 144 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 121 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-13 06:26:25,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2024-09-13 06:26:25,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 53. [2024-09-13 06:26:25,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 35 states have (on average 1.2) internal successors, (42), 36 states have internal predecessors, (42), 11 states have call successors, (11), 5 states have call predecessors, (11), 5 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2024-09-13 06:26:25,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 64 transitions. [2024-09-13 06:26:25,764 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 64 transitions. Word has length 10 [2024-09-13 06:26:25,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 06:26:25,764 INFO L474 AbstractCegarLoop]: Abstraction has 53 states and 64 transitions. [2024-09-13 06:26:25,765 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 1.5) internal successors, (15), 7 states have internal predecessors, (15), 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) [2024-09-13 06:26:25,765 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 64 transitions. [2024-09-13 06:26:25,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2024-09-13 06:26:25,765 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 06:26:25,765 INFO L216 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1] [2024-09-13 06:26:25,785 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-09-13 06:26:25,966 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 06:26:25,967 INFO L399 AbstractCegarLoop]: === Iteration 4 === Targeting fiboErr0ENSURES_VIOLATIONPOST_CONDITION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, fiboErr0ENSURES_VIOLATIONPOST_CONDITION] === [2024-09-13 06:26:25,967 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 06:26:25,967 INFO L85 PathProgramCache]: Analyzing trace with hash -254987590, now seen corresponding path program 2 times [2024-09-13 06:26:25,967 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 06:26:25,968 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [832411349] [2024-09-13 06:26:25,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 06:26:25,968 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 06:26:25,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:26:26,276 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 28 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-13 06:26:26,278 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 06:26:26,278 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [832411349] [2024-09-13 06:26:26,278 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [832411349] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 06:26:26,278 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2086342768] [2024-09-13 06:26:26,279 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-13 06:26:26,282 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 06:26:26,282 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 06:26:26,284 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-13 06:26:26,287 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-09-13 06:26:26,324 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-09-13 06:26:26,324 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 06:26:26,325 INFO L262 TraceCheckSpWp]: Trace formula consists of 35 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-09-13 06:26:26,326 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 06:26:26,387 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2024-09-13 06:26:26,388 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-13 06:26:26,389 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2086342768] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-13 06:26:26,389 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-09-13 06:26:26,389 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [13] total 16 [2024-09-13 06:26:26,391 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [237497524] [2024-09-13 06:26:26,392 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-13 06:26:26,392 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-13 06:26:26,392 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 06:26:26,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-13 06:26:26,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2024-09-13 06:26:26,393 INFO L87 Difference]: Start difference. First operand 53 states and 64 transitions. Second operand has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-13 06:26:26,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 06:26:26,448 INFO L93 Difference]: Finished difference Result 56 states and 75 transitions. [2024-09-13 06:26:26,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-13 06:26:26,449 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 1 states have call successors, (2), 1 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 22 [2024-09-13 06:26:26,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 06:26:26,451 INFO L225 Difference]: With dead ends: 56 [2024-09-13 06:26:26,451 INFO L226 Difference]: Without dead ends: 56 [2024-09-13 06:26:26,451 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2024-09-13 06:26:26,454 INFO L434 NwaCegarLoop]: 12 mSDtfsCounter, 11 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-13 06:26:26,455 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 19 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-13 06:26:26,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2024-09-13 06:26:26,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 53. [2024-09-13 06:26:26,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 35 states have (on average 1.2) internal successors, (42), 36 states have internal predecessors, (42), 11 states have call successors, (11), 5 states have call predecessors, (11), 5 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2024-09-13 06:26:26,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 64 transitions. [2024-09-13 06:26:26,466 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 64 transitions. Word has length 22 [2024-09-13 06:26:26,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 06:26:26,466 INFO L474 AbstractCegarLoop]: Abstraction has 53 states and 64 transitions. [2024-09-13 06:26:26,467 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-13 06:26:26,467 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 64 transitions. [2024-09-13 06:26:26,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2024-09-13 06:26:26,468 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 06:26:26,468 INFO L216 NwaCegarLoop]: trace histogram [6, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 06:26:26,487 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-09-13 06:26:26,668 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 06:26:26,669 INFO L399 AbstractCegarLoop]: === Iteration 5 === Targeting fiboErr0ENSURES_VIOLATIONPOST_CONDITION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, fiboErr0ENSURES_VIOLATIONPOST_CONDITION] === [2024-09-13 06:26:26,669 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 06:26:26,669 INFO L85 PathProgramCache]: Analyzing trace with hash -2098277332, now seen corresponding path program 1 times [2024-09-13 06:26:26,670 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 06:26:26,670 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1973554001] [2024-09-13 06:26:26,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 06:26:26,670 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 06:26:26,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:26:26,750 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2024-09-13 06:26:26,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:26:26,786 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-09-13 06:26:26,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:26:26,794 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 12 proven. 3 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-09-13 06:26:26,794 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 06:26:26,794 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1973554001] [2024-09-13 06:26:26,795 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1973554001] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 06:26:26,795 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [501921258] [2024-09-13 06:26:26,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 06:26:26,795 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 06:26:26,796 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 06:26:26,798 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-13 06:26:26,800 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-09-13 06:26:26,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:26:26,856 INFO L262 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-09-13 06:26:26,861 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 06:26:27,016 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 13 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-09-13 06:26:27,017 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 06:26:27,220 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 2 proven. 43 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-09-13 06:26:27,220 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [501921258] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 06:26:27,220 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-13 06:26:27,221 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 13, 13] total 16 [2024-09-13 06:26:27,221 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [106595370] [2024-09-13 06:26:27,221 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-13 06:26:27,222 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-09-13 06:26:27,222 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 06:26:27,223 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-09-13 06:26:27,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2024-09-13 06:26:27,224 INFO L87 Difference]: Start difference. First operand 53 states and 64 transitions. Second operand has 16 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 12 states have internal predecessors, (34), 7 states have call successors, (9), 6 states have call predecessors, (9), 3 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-13 06:26:27,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 06:26:27,553 INFO L93 Difference]: Finished difference Result 115 states and 196 transitions. [2024-09-13 06:26:27,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-09-13 06:26:27,555 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 12 states have internal predecessors, (34), 7 states have call successors, (9), 6 states have call predecessors, (9), 3 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 30 [2024-09-13 06:26:27,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 06:26:27,557 INFO L225 Difference]: With dead ends: 115 [2024-09-13 06:26:27,557 INFO L226 Difference]: Without dead ends: 115 [2024-09-13 06:26:27,558 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 48 SyntacticMatches, 10 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=114, Invalid=306, Unknown=0, NotChecked=0, Total=420 [2024-09-13 06:26:27,560 INFO L434 NwaCegarLoop]: 19 mSDtfsCounter, 81 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 218 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 269 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 218 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-13 06:26:27,561 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [82 Valid, 81 Invalid, 269 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 218 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-13 06:26:27,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2024-09-13 06:26:27,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 100. [2024-09-13 06:26:27,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 64 states have (on average 1.1875) internal successors, (76), 66 states have internal predecessors, (76), 22 states have call successors, (22), 8 states have call predecessors, (22), 12 states have return successors, (65), 25 states have call predecessors, (65), 22 states have call successors, (65) [2024-09-13 06:26:27,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 163 transitions. [2024-09-13 06:26:27,586 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 163 transitions. Word has length 30 [2024-09-13 06:26:27,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 06:26:27,587 INFO L474 AbstractCegarLoop]: Abstraction has 100 states and 163 transitions. [2024-09-13 06:26:27,587 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 12 states have internal predecessors, (34), 7 states have call successors, (9), 6 states have call predecessors, (9), 3 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-13 06:26:27,587 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 163 transitions. [2024-09-13 06:26:27,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2024-09-13 06:26:27,588 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 06:26:27,588 INFO L216 NwaCegarLoop]: trace histogram [6, 5, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 06:26:27,605 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-09-13 06:26:27,788 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 06:26:27,789 INFO L399 AbstractCegarLoop]: === Iteration 6 === Targeting fiboErr0ENSURES_VIOLATIONPOST_CONDITION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, fiboErr0ENSURES_VIOLATIONPOST_CONDITION] === [2024-09-13 06:26:27,790 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 06:26:27,790 INFO L85 PathProgramCache]: Analyzing trace with hash -2106411776, now seen corresponding path program 1 times [2024-09-13 06:26:27,790 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 06:26:27,790 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [200635326] [2024-09-13 06:26:27,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 06:26:27,790 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 06:26:27,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:26:28,059 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2024-09-13 06:26:28,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:26:28,092 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2024-09-13 06:26:28,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:26:28,121 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 1 proven. 47 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-09-13 06:26:28,121 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 06:26:28,121 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [200635326] [2024-09-13 06:26:28,121 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [200635326] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 06:26:28,122 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [157533521] [2024-09-13 06:26:28,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 06:26:28,122 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 06:26:28,122 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 06:26:28,124 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-13 06:26:28,125 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-09-13 06:26:28,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:26:28,181 INFO L262 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 27 conjuncts are in the unsatisfiable core [2024-09-13 06:26:28,183 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 06:26:28,256 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 1 proven. 47 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-09-13 06:26:28,257 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 06:26:29,147 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-09-13 06:26:29,147 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [157533521] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 06:26:29,147 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-13 06:26:29,147 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 25 [2024-09-13 06:26:29,147 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [708361420] [2024-09-13 06:26:29,148 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-13 06:26:29,148 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-09-13 06:26:29,148 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 06:26:29,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-09-13 06:26:29,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=573, Unknown=0, NotChecked=0, Total=650 [2024-09-13 06:26:29,151 INFO L87 Difference]: Start difference. First operand 100 states and 163 transitions. Second operand has 26 states, 23 states have (on average 1.6521739130434783) internal successors, (38), 18 states have internal predecessors, (38), 12 states have call successors, (12), 9 states have call predecessors, (12), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-09-13 06:26:30,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 06:26:30,843 INFO L93 Difference]: Finished difference Result 159 states and 266 transitions. [2024-09-13 06:26:30,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2024-09-13 06:26:30,843 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 23 states have (on average 1.6521739130434783) internal successors, (38), 18 states have internal predecessors, (38), 12 states have call successors, (12), 9 states have call predecessors, (12), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 31 [2024-09-13 06:26:30,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 06:26:30,845 INFO L225 Difference]: With dead ends: 159 [2024-09-13 06:26:30,846 INFO L226 Difference]: Without dead ends: 157 [2024-09-13 06:26:30,847 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 640 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=360, Invalid=2832, Unknown=0, NotChecked=0, Total=3192 [2024-09-13 06:26:30,847 INFO L434 NwaCegarLoop]: 20 mSDtfsCounter, 125 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 928 mSolverCounterSat, 101 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 147 SdHoareTripleChecker+Invalid, 1029 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 101 IncrementalHoareTripleChecker+Valid, 928 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-09-13 06:26:30,848 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [138 Valid, 147 Invalid, 1029 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [101 Valid, 928 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-09-13 06:26:30,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2024-09-13 06:26:30,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 138. [2024-09-13 06:26:30,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 91 states have (on average 1.1978021978021978) internal successors, (109), 90 states have internal predecessors, (109), 28 states have call successors, (28), 11 states have call predecessors, (28), 17 states have return successors, (103), 36 states have call predecessors, (103), 28 states have call successors, (103) [2024-09-13 06:26:30,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 240 transitions. [2024-09-13 06:26:30,884 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 240 transitions. Word has length 31 [2024-09-13 06:26:30,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 06:26:30,884 INFO L474 AbstractCegarLoop]: Abstraction has 138 states and 240 transitions. [2024-09-13 06:26:30,885 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 23 states have (on average 1.6521739130434783) internal successors, (38), 18 states have internal predecessors, (38), 12 states have call successors, (12), 9 states have call predecessors, (12), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-09-13 06:26:30,885 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 240 transitions. [2024-09-13 06:26:30,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2024-09-13 06:26:30,887 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 06:26:30,887 INFO L216 NwaCegarLoop]: trace histogram [6, 6, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 06:26:30,904 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-09-13 06:26:31,087 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 06:26:31,088 INFO L399 AbstractCegarLoop]: === Iteration 7 === Targeting fiboErr0ENSURES_VIOLATIONPOST_CONDITION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, fiboErr0ENSURES_VIOLATIONPOST_CONDITION] === [2024-09-13 06:26:31,089 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 06:26:31,089 INFO L85 PathProgramCache]: Analyzing trace with hash -851368470, now seen corresponding path program 1 times [2024-09-13 06:26:31,089 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 06:26:31,089 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1353518937] [2024-09-13 06:26:31,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 06:26:31,089 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 06:26:31,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:26:31,234 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2024-09-13 06:26:31,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:26:31,240 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2024-09-13 06:26:31,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:26:31,281 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 28 proven. 24 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-09-13 06:26:31,282 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 06:26:31,282 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1353518937] [2024-09-13 06:26:31,282 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1353518937] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 06:26:31,282 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [967056655] [2024-09-13 06:26:31,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 06:26:31,283 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 06:26:31,283 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 06:26:31,284 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-13 06:26:31,286 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-09-13 06:26:31,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:26:31,329 INFO L262 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-09-13 06:26:31,331 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 06:26:31,381 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 30 proven. 24 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-09-13 06:26:31,382 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 06:26:31,506 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 30 proven. 24 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-09-13 06:26:31,506 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [967056655] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 06:26:31,506 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-13 06:26:31,506 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 15 [2024-09-13 06:26:31,507 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1258461414] [2024-09-13 06:26:31,507 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-13 06:26:31,507 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-09-13 06:26:31,507 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 06:26:31,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-09-13 06:26:31,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2024-09-13 06:26:31,508 INFO L87 Difference]: Start difference. First operand 138 states and 240 transitions. Second operand has 15 states, 14 states have (on average 2.0) internal successors, (28), 11 states have internal predecessors, (28), 5 states have call successors, (6), 5 states have call predecessors, (6), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2024-09-13 06:26:31,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 06:26:31,788 INFO L93 Difference]: Finished difference Result 86 states and 100 transitions. [2024-09-13 06:26:31,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-09-13 06:26:31,789 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 2.0) internal successors, (28), 11 states have internal predecessors, (28), 5 states have call successors, (6), 5 states have call predecessors, (6), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 32 [2024-09-13 06:26:31,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 06:26:31,793 INFO L225 Difference]: With dead ends: 86 [2024-09-13 06:26:31,793 INFO L226 Difference]: Without dead ends: 86 [2024-09-13 06:26:31,794 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 59 SyntacticMatches, 10 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=219, Invalid=537, Unknown=0, NotChecked=0, Total=756 [2024-09-13 06:26:31,794 INFO L434 NwaCegarLoop]: 11 mSDtfsCounter, 107 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 184 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 242 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 184 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-13 06:26:31,795 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [108 Valid, 48 Invalid, 242 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 184 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-13 06:26:31,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2024-09-13 06:26:31,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 79. [2024-09-13 06:26:31,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 52 states have (on average 1.1538461538461537) internal successors, (60), 54 states have internal predecessors, (60), 16 states have call successors, (16), 8 states have call predecessors, (16), 9 states have return successors, (20), 16 states have call predecessors, (20), 14 states have call successors, (20) [2024-09-13 06:26:31,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 96 transitions. [2024-09-13 06:26:31,806 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 96 transitions. Word has length 32 [2024-09-13 06:26:31,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 06:26:31,807 INFO L474 AbstractCegarLoop]: Abstraction has 79 states and 96 transitions. [2024-09-13 06:26:31,807 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 2.0) internal successors, (28), 11 states have internal predecessors, (28), 5 states have call successors, (6), 5 states have call predecessors, (6), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2024-09-13 06:26:31,807 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 96 transitions. [2024-09-13 06:26:31,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2024-09-13 06:26:31,811 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 06:26:31,811 INFO L216 NwaCegarLoop]: trace histogram [9, 8, 7, 7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 06:26:31,828 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-09-13 06:26:32,011 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2024-09-13 06:26:32,012 INFO L399 AbstractCegarLoop]: === Iteration 8 === Targeting fiboErr0ENSURES_VIOLATIONPOST_CONDITION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, fiboErr0ENSURES_VIOLATIONPOST_CONDITION] === [2024-09-13 06:26:32,013 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 06:26:32,013 INFO L85 PathProgramCache]: Analyzing trace with hash 1641789625, now seen corresponding path program 2 times [2024-09-13 06:26:32,013 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 06:26:32,013 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [884267414] [2024-09-13 06:26:32,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 06:26:32,013 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 06:26:32,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:26:32,210 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2024-09-13 06:26:32,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:26:32,215 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2024-09-13 06:26:32,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:26:32,220 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 80 proven. 35 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-09-13 06:26:32,221 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 06:26:32,221 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [884267414] [2024-09-13 06:26:32,221 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [884267414] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 06:26:32,221 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [71191926] [2024-09-13 06:26:32,222 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-13 06:26:32,222 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 06:26:32,222 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 06:26:32,224 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-13 06:26:32,226 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-09-13 06:26:32,272 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-13 06:26:32,273 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 06:26:32,274 INFO L262 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-09-13 06:26:32,276 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 06:26:32,349 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 111 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2024-09-13 06:26:32,350 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-13 06:26:32,350 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [71191926] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-13 06:26:32,351 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-09-13 06:26:32,351 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [14] total 16 [2024-09-13 06:26:32,351 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1209614108] [2024-09-13 06:26:32,351 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-13 06:26:32,352 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-09-13 06:26:32,352 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 06:26:32,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-09-13 06:26:32,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2024-09-13 06:26:32,353 INFO L87 Difference]: Start difference. First operand 79 states and 96 transitions. Second operand has 15 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 8 states have internal predecessors, (27), 7 states have call successors, (8), 7 states have call predecessors, (8), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-09-13 06:26:32,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 06:26:32,554 INFO L93 Difference]: Finished difference Result 55 states and 58 transitions. [2024-09-13 06:26:32,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-09-13 06:26:32,555 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 8 states have internal predecessors, (27), 7 states have call successors, (8), 7 states have call predecessors, (8), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 43 [2024-09-13 06:26:32,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 06:26:32,556 INFO L225 Difference]: With dead ends: 55 [2024-09-13 06:26:32,556 INFO L226 Difference]: Without dead ends: 54 [2024-09-13 06:26:32,557 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=152, Invalid=354, Unknown=0, NotChecked=0, Total=506 [2024-09-13 06:26:32,557 INFO L434 NwaCegarLoop]: 12 mSDtfsCounter, 73 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 239 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 275 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 239 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-13 06:26:32,558 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [74 Valid, 57 Invalid, 275 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 239 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-13 06:26:32,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2024-09-13 06:26:32,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 52. [2024-09-13 06:26:32,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 35 states have (on average 1.0857142857142856) internal successors, (38), 36 states have internal predecessors, (38), 9 states have call successors, (9), 6 states have call predecessors, (9), 6 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2024-09-13 06:26:32,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 56 transitions. [2024-09-13 06:26:32,564 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 56 transitions. Word has length 43 [2024-09-13 06:26:32,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 06:26:32,565 INFO L474 AbstractCegarLoop]: Abstraction has 52 states and 56 transitions. [2024-09-13 06:26:32,565 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 8 states have internal predecessors, (27), 7 states have call successors, (8), 7 states have call predecessors, (8), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-09-13 06:26:32,565 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 56 transitions. [2024-09-13 06:26:32,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2024-09-13 06:26:32,569 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 06:26:32,569 INFO L216 NwaCegarLoop]: trace histogram [7, 6, 4, 4, 4, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1] [2024-09-13 06:26:32,589 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-09-13 06:26:32,775 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 06:26:32,775 INFO L399 AbstractCegarLoop]: === Iteration 9 === Targeting fiboErr0ENSURES_VIOLATIONPOST_CONDITION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, fiboErr0ENSURES_VIOLATIONPOST_CONDITION] === [2024-09-13 06:26:32,775 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 06:26:32,775 INFO L85 PathProgramCache]: Analyzing trace with hash 771033264, now seen corresponding path program 3 times [2024-09-13 06:26:32,776 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 06:26:32,776 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [279347298] [2024-09-13 06:26:32,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 06:26:32,776 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 06:26:32,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:26:33,012 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2024-09-13 06:26:33,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:26:33,081 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-13 06:26:33,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:26:33,093 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-13 06:26:33,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:26:33,114 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2024-09-13 06:26:33,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:26:33,127 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 2 proven. 59 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-09-13 06:26:33,127 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 06:26:33,127 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [279347298] [2024-09-13 06:26:33,128 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [279347298] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 06:26:33,128 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [20573191] [2024-09-13 06:26:33,128 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-13 06:26:33,128 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 06:26:33,128 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 06:26:33,130 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-13 06:26:33,132 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-09-13 06:26:33,177 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2024-09-13 06:26:33,177 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 06:26:33,178 INFO L262 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 31 conjuncts are in the unsatisfiable core [2024-09-13 06:26:33,180 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 06:26:33,249 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 2 proven. 59 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-09-13 06:26:33,250 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 06:26:33,801 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-09-13 06:26:33,802 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [20573191] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 06:26:33,802 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-13 06:26:33,802 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 24 [2024-09-13 06:26:33,802 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [903670380] [2024-09-13 06:26:33,802 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-13 06:26:33,803 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-09-13 06:26:33,803 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 06:26:33,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-09-13 06:26:33,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=532, Unknown=0, NotChecked=0, Total=600 [2024-09-13 06:26:33,804 INFO L87 Difference]: Start difference. First operand 52 states and 56 transitions. Second operand has 25 states, 22 states have (on average 1.6363636363636365) internal successors, (36), 17 states have internal predecessors, (36), 12 states have call successors, (12), 7 states have call predecessors, (12), 2 states have return successors, (7), 7 states have call predecessors, (7), 6 states have call successors, (7) [2024-09-13 06:26:34,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 06:26:34,251 INFO L93 Difference]: Finished difference Result 52 states and 54 transitions. [2024-09-13 06:26:34,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-09-13 06:26:34,251 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 22 states have (on average 1.6363636363636365) internal successors, (36), 17 states have internal predecessors, (36), 12 states have call successors, (12), 7 states have call predecessors, (12), 2 states have return successors, (7), 7 states have call predecessors, (7), 6 states have call successors, (7) Word has length 41 [2024-09-13 06:26:34,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 06:26:34,252 INFO L225 Difference]: With dead ends: 52 [2024-09-13 06:26:34,252 INFO L226 Difference]: Without dead ends: 52 [2024-09-13 06:26:34,253 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=122, Invalid=934, Unknown=0, NotChecked=0, Total=1056 [2024-09-13 06:26:34,253 INFO L434 NwaCegarLoop]: 17 mSDtfsCounter, 40 mSDsluCounter, 125 mSDsCounter, 0 mSdLazyCounter, 577 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 142 SdHoareTripleChecker+Invalid, 596 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 577 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-13 06:26:34,253 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 142 Invalid, 596 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 577 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-13 06:26:34,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2024-09-13 06:26:34,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2024-09-13 06:26:34,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 35 states have (on average 1.0285714285714285) internal successors, (36), 36 states have internal predecessors, (36), 9 states have call successors, (9), 6 states have call predecessors, (9), 6 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2024-09-13 06:26:34,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 54 transitions. [2024-09-13 06:26:34,257 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 54 transitions. Word has length 41 [2024-09-13 06:26:34,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 06:26:34,258 INFO L474 AbstractCegarLoop]: Abstraction has 52 states and 54 transitions. [2024-09-13 06:26:34,258 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 22 states have (on average 1.6363636363636365) internal successors, (36), 17 states have internal predecessors, (36), 12 states have call successors, (12), 7 states have call predecessors, (12), 2 states have return successors, (7), 7 states have call predecessors, (7), 6 states have call successors, (7) [2024-09-13 06:26:34,258 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 54 transitions. [2024-09-13 06:26:34,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2024-09-13 06:26:34,259 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 06:26:34,259 INFO L216 NwaCegarLoop]: trace histogram [15, 14, 12, 7, 7, 7, 7, 7, 7, 7, 5, 3, 1, 1, 1] [2024-09-13 06:26:34,276 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-09-13 06:26:34,463 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 06:26:34,464 INFO L399 AbstractCegarLoop]: === Iteration 10 === Targeting fiboErr0ENSURES_VIOLATIONPOST_CONDITION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, fiboErr0ENSURES_VIOLATIONPOST_CONDITION] === [2024-09-13 06:26:34,464 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 06:26:34,464 INFO L85 PathProgramCache]: Analyzing trace with hash -1240694291, now seen corresponding path program 4 times [2024-09-13 06:26:34,464 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 06:26:34,465 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1851266053] [2024-09-13 06:26:34,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 06:26:34,465 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 06:26:34,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:26:34,968 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-13 06:26:34,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:26:35,112 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-13 06:26:35,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:26:35,212 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-13 06:26:35,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:26:35,273 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-13 06:26:35,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:26:35,283 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-13 06:26:35,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:26:35,305 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-09-13 06:26:35,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:26:35,316 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2024-09-13 06:26:35,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:26:35,348 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-13 06:26:35,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:26:35,360 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-13 06:26:35,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:26:35,380 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2024-09-13 06:26:35,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:26:35,437 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-13 06:26:35,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:26:35,465 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-13 06:26:35,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:26:35,475 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-13 06:26:35,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:26:35,485 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-09-13 06:26:35,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:26:35,496 INFO L134 CoverageAnalysis]: Checked inductivity of 556 backedges. 0 proven. 216 refuted. 0 times theorem prover too weak. 340 trivial. 0 not checked. [2024-09-13 06:26:35,497 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 06:26:35,497 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1851266053] [2024-09-13 06:26:35,497 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1851266053] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 06:26:35,497 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2144621270] [2024-09-13 06:26:35,498 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-13 06:26:35,498 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 06:26:35,498 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 06:26:35,500 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-13 06:26:35,502 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-09-13 06:26:35,576 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-13 06:26:35,576 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 06:26:35,579 INFO L262 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 70 conjuncts are in the unsatisfiable core [2024-09-13 06:26:35,585 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 06:26:35,986 INFO L134 CoverageAnalysis]: Checked inductivity of 556 backedges. 29 proven. 292 refuted. 0 times theorem prover too weak. 235 trivial. 0 not checked. [2024-09-13 06:26:35,987 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 06:26:37,074 INFO L134 CoverageAnalysis]: Checked inductivity of 556 backedges. 25 proven. 318 refuted. 0 times theorem prover too weak. 213 trivial. 0 not checked. [2024-09-13 06:26:37,074 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2144621270] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 06:26:37,074 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-13 06:26:37,074 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 21, 25] total 40 [2024-09-13 06:26:37,075 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [627895536] [2024-09-13 06:26:37,075 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-13 06:26:37,075 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2024-09-13 06:26:37,076 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 06:26:37,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2024-09-13 06:26:37,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=1492, Unknown=0, NotChecked=0, Total=1640 [2024-09-13 06:26:37,078 INFO L87 Difference]: Start difference. First operand 52 states and 54 transitions. Second operand has 41 states, 38 states have (on average 1.631578947368421) internal successors, (62), 29 states have internal predecessors, (62), 15 states have call successors, (16), 2 states have call predecessors, (16), 9 states have return successors, (24), 19 states have call predecessors, (24), 14 states have call successors, (24) [2024-09-13 06:26:37,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 06:26:37,722 INFO L93 Difference]: Finished difference Result 59 states and 62 transitions. [2024-09-13 06:26:37,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-09-13 06:26:37,723 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 38 states have (on average 1.631578947368421) internal successors, (62), 29 states have internal predecessors, (62), 15 states have call successors, (16), 2 states have call predecessors, (16), 9 states have return successors, (24), 19 states have call predecessors, (24), 14 states have call successors, (24) Word has length 101 [2024-09-13 06:26:37,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 06:26:37,724 INFO L225 Difference]: With dead ends: 59 [2024-09-13 06:26:37,724 INFO L226 Difference]: Without dead ends: 59 [2024-09-13 06:26:37,725 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 281 GetRequests, 224 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 739 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=368, Invalid=2938, Unknown=0, NotChecked=0, Total=3306 [2024-09-13 06:26:37,726 INFO L434 NwaCegarLoop]: 10 mSDtfsCounter, 67 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 855 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 903 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 855 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-09-13 06:26:37,726 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [71 Valid, 84 Invalid, 903 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 855 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-09-13 06:26:37,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2024-09-13 06:26:37,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 51. [2024-09-13 06:26:37,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 35 states have (on average 1.0) internal successors, (35), 35 states have internal predecessors, (35), 9 states have call successors, (9), 6 states have call predecessors, (9), 6 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2024-09-13 06:26:37,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 53 transitions. [2024-09-13 06:26:37,730 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 53 transitions. Word has length 101 [2024-09-13 06:26:37,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 06:26:37,730 INFO L474 AbstractCegarLoop]: Abstraction has 51 states and 53 transitions. [2024-09-13 06:26:37,731 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 38 states have (on average 1.631578947368421) internal successors, (62), 29 states have internal predecessors, (62), 15 states have call successors, (16), 2 states have call predecessors, (16), 9 states have return successors, (24), 19 states have call predecessors, (24), 14 states have call successors, (24) [2024-09-13 06:26:37,731 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 53 transitions. [2024-09-13 06:26:37,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2024-09-13 06:26:37,732 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 06:26:37,732 INFO L216 NwaCegarLoop]: trace histogram [15, 15, 12, 7, 7, 7, 7, 7, 7, 7, 5, 3, 1, 1, 1, 1, 1, 1] [2024-09-13 06:26:37,746 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-09-13 06:26:37,935 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,9 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 06:26:37,935 INFO L399 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, fiboErr0ENSURES_VIOLATIONPOST_CONDITION] === [2024-09-13 06:26:37,936 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 06:26:37,936 INFO L85 PathProgramCache]: Analyzing trace with hash -151965584, now seen corresponding path program 1 times [2024-09-13 06:26:37,936 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 06:26:37,936 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1069947989] [2024-09-13 06:26:37,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 06:26:37,936 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 06:26:37,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:26:38,405 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-09-13 06:26:38,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:26:38,646 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-13 06:26:38,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:26:38,764 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-13 06:26:38,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:26:38,857 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-13 06:26:38,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:26:38,906 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-13 06:26:38,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:26:38,917 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-13 06:26:38,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:26:38,941 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-09-13 06:26:38,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:26:38,950 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2024-09-13 06:26:38,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:26:38,977 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-13 06:26:38,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:26:38,986 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-13 06:26:38,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:26:38,997 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2024-09-13 06:26:39,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:26:39,041 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-13 06:26:39,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:26:39,064 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-13 06:26:39,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:26:39,074 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-13 06:26:39,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:26:39,084 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-09-13 06:26:39,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:26:39,093 INFO L134 CoverageAnalysis]: Checked inductivity of 570 backedges. 0 proven. 185 refuted. 0 times theorem prover too weak. 385 trivial. 0 not checked. [2024-09-13 06:26:39,094 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 06:26:39,094 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1069947989] [2024-09-13 06:26:39,094 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1069947989] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 06:26:39,094 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2004067370] [2024-09-13 06:26:39,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 06:26:39,094 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 06:26:39,094 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 06:26:39,096 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-13 06:26:39,097 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-09-13 06:26:39,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:26:39,165 INFO L262 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 64 conjuncts are in the unsatisfiable core [2024-09-13 06:26:39,168 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 06:26:39,388 INFO L134 CoverageAnalysis]: Checked inductivity of 570 backedges. 7 proven. 200 refuted. 0 times theorem prover too weak. 363 trivial. 0 not checked. [2024-09-13 06:26:39,388 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 06:26:39,953 INFO L134 CoverageAnalysis]: Checked inductivity of 570 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 556 trivial. 0 not checked. [2024-09-13 06:26:39,953 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2004067370] provided 1 perfect and 1 imperfect interpolant sequences [2024-09-13 06:26:39,953 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-09-13 06:26:39,953 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [16, 17] total 23 [2024-09-13 06:26:39,954 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [31099242] [2024-09-13 06:26:39,954 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-13 06:26:39,954 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-09-13 06:26:39,954 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 06:26:39,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-09-13 06:26:39,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=453, Unknown=0, NotChecked=0, Total=506 [2024-09-13 06:26:39,955 INFO L87 Difference]: Start difference. First operand 51 states and 53 transitions. Second operand has 6 states, 4 states have (on average 3.25) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-13 06:26:40,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 06:26:40,003 INFO L93 Difference]: Finished difference Result 49 states and 51 transitions. [2024-09-13 06:26:40,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-09-13 06:26:40,003 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 4 states have (on average 3.25) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 105 [2024-09-13 06:26:40,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 06:26:40,004 INFO L225 Difference]: With dead ends: 49 [2024-09-13 06:26:40,004 INFO L226 Difference]: Without dead ends: 0 [2024-09-13 06:26:40,004 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 273 GetRequests, 249 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=61, Invalid=539, Unknown=0, NotChecked=0, Total=600 [2024-09-13 06:26:40,005 INFO L434 NwaCegarLoop]: 11 mSDtfsCounter, 1 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-13 06:26:40,005 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 47 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-13 06:26:40,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2024-09-13 06:26:40,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2024-09-13 06:26:40,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-13 06:26:40,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2024-09-13 06:26:40,006 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 105 [2024-09-13 06:26:40,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 06:26:40,008 INFO L474 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2024-09-13 06:26:40,008 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 4 states have (on average 3.25) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-13 06:26:40,008 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2024-09-13 06:26:40,008 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2024-09-13 06:26:40,011 INFO L785 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 2 remaining) [2024-09-13 06:26:40,012 INFO L785 garLoopResultBuilder]: Registering result SAFE for location fiboErr0ENSURES_VIOLATIONPOST_CONDITION (0 of 2 remaining) [2024-09-13 06:26:40,029 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-09-13 06:26:40,212 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2024-09-13 06:26:40,216 INFO L408 BasicCegarLoop]: Path program histogram: [4, 2, 1, 1, 1, 1, 1] [2024-09-13 06:26:40,218 INFO L165 ceAbstractionStarter]: Computing trace abstraction results [2024-09-13 06:26:40,221 INFO L201 PluginConnector]: Adding new model witness-2.1.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 13.09 06:26:40 BoogieIcfgContainer [2024-09-13 06:26:40,222 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2024-09-13 06:26:40,222 INFO L158 Benchmark]: Toolchain (without parser) took 16777.13ms. Allocated memory was 151.0MB in the beginning and 333.4MB in the end (delta: 182.5MB). Free memory was 74.9MB in the beginning and 253.7MB in the end (delta: -178.9MB). Peak memory consumption was 5.0MB. Max. memory is 16.1GB. [2024-09-13 06:26:40,223 INFO L158 Benchmark]: CDTParser took 0.23ms. Allocated memory is still 151.0MB. Free memory is still 122.4MB. There was no memory consumed. Max. memory is 16.1GB. [2024-09-13 06:26:40,223 INFO L158 Benchmark]: Witness Parser took 0.11ms. Allocated memory is still 151.0MB. Free memory is still 76.6MB. There was no memory consumed. Max. memory is 16.1GB. [2024-09-13 06:26:40,223 INFO L158 Benchmark]: CACSL2BoogieTranslator took 281.01ms. Allocated memory is still 151.0MB. Free memory was 74.5MB in the beginning and 62.1MB in the end (delta: 12.4MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2024-09-13 06:26:40,223 INFO L158 Benchmark]: Boogie Procedure Inliner took 32.54ms. Allocated memory is still 151.0MB. Free memory was 62.1MB in the beginning and 60.7MB in the end (delta: 1.4MB). There was no memory consumed. Max. memory is 16.1GB. [2024-09-13 06:26:40,224 INFO L158 Benchmark]: Boogie Preprocessor took 65.28ms. Allocated memory is still 151.0MB. Free memory was 60.7MB in the beginning and 122.8MB in the end (delta: -62.2MB). Peak memory consumption was 7.0MB. Max. memory is 16.1GB. [2024-09-13 06:26:40,224 INFO L158 Benchmark]: RCFGBuilder took 412.62ms. Allocated memory is still 151.0MB. Free memory was 122.8MB in the beginning and 115.9MB in the end (delta: 7.0MB). Peak memory consumption was 9.3MB. Max. memory is 16.1GB. [2024-09-13 06:26:40,224 INFO L158 Benchmark]: TraceAbstraction took 15976.52ms. Allocated memory was 151.0MB in the beginning and 333.4MB in the end (delta: 182.5MB). Free memory was 114.9MB in the beginning and 253.7MB in the end (delta: -138.8MB). Peak memory consumption was 45.3MB. Max. memory is 16.1GB. [2024-09-13 06:26:40,226 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23ms. Allocated memory is still 151.0MB. Free memory is still 122.4MB. There was no memory consumed. Max. memory is 16.1GB. * Witness Parser took 0.11ms. Allocated memory is still 151.0MB. Free memory is still 76.6MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 281.01ms. Allocated memory is still 151.0MB. Free memory was 74.5MB in the beginning and 62.1MB in the end (delta: 12.4MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 32.54ms. Allocated memory is still 151.0MB. Free memory was 62.1MB in the beginning and 60.7MB in the end (delta: 1.4MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 65.28ms. Allocated memory is still 151.0MB. Free memory was 60.7MB in the beginning and 122.8MB in the end (delta: -62.2MB). Peak memory consumption was 7.0MB. Max. memory is 16.1GB. * RCFGBuilder took 412.62ms. Allocated memory is still 151.0MB. Free memory was 122.8MB in the beginning and 115.9MB in the end (delta: 7.0MB). Peak memory consumption was 9.3MB. Max. memory is 16.1GB. * TraceAbstraction took 15976.52ms. Allocated memory was 151.0MB in the beginning and 333.4MB in the end (delta: 182.5MB). Free memory was 114.9MB in the beginning and 253.7MB in the end (delta: -138.8MB). Peak memory consumption was 45.3MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 29]: a call to reach_error is unreachable For all program executions holds that a call to reach_error is unreachable at this location - PositiveResult [Line: 7]: procedure postcondition always holds For all program executions holds that procedure postcondition always holds at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 18 locations, 2 error locations. Started 1 CEGAR loops. OverallTime: 15.9s, OverallIterations: 11, TraceHistogramMax: 15, PathProgramHistogramMax: 4, EmptinessCheckTime: 0.0s, AutomataDifference: 4.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 615 SdHoareTripleChecker+Valid, 2.2s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 585 mSDsluCounter, 771 SdHoareTripleChecker+Invalid, 1.8s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 610 mSDsCounter, 343 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 3267 IncrementalHoareTripleChecker+Invalid, 3610 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 343 mSolverCounterUnsat, 161 mSDtfsCounter, 3267 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1087 GetRequests, 799 SyntacticMatches, 22 SemanticMatches, 266 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1932 ImplicationChecksByTransitivity, 4.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=138occurred in iteration=6, InterpolantAutomatonStates: 173, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 11 MinimizatonAttempts, 63 StatesRemovedByMinimization, 9 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 8.7s InterpolantComputationTime, 841 NumberOfCodeBlocks, 825 NumberOfCodeBlocksAsserted, 28 NumberOfCheckSat, 1164 ConstructedInterpolants, 0 QuantifiedInterpolants, 3682 SizeOfPredicates, 28 NumberOfNonLiveVariables, 1106 ConjunctsInSsa, 243 ConjunctsInUnsatCore, 27 InterpolantComputations, 5 PerfectInterpolantSequences, 2674/4408 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 2 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2024-09-13 06:26:40,250 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE