./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/recursive-simple/fibo_7-1.c --full-output --witness-type correctness_witness --validate ../results/automizer-verification-files/SV-COMP24_unreach-call/fibo_7-1.yml/witness-2.1.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 1d5fa637 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_7-1.c ../results/automizer-verification-files/SV-COMP24_unreach-call/fibo_7-1.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-1d5fa63-m [2024-09-13 10:27:51,594 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-09-13 10:27:51,660 INFO L114 SettingsManager]: Loading settings from /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-09-13 10:27:51,667 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-09-13 10:27:51,669 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-09-13 10:27:51,700 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-09-13 10:27:51,702 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-09-13 10:27:51,703 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-09-13 10:27:51,703 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-09-13 10:27:51,704 INFO L153 SettingsManager]: * Use memory slicer=true [2024-09-13 10:27:51,706 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-09-13 10:27:51,706 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-09-13 10:27:51,707 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-09-13 10:27:51,707 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-09-13 10:27:51,707 INFO L153 SettingsManager]: * Use SBE=true [2024-09-13 10:27:51,711 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-09-13 10:27:51,711 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-09-13 10:27:51,712 INFO L153 SettingsManager]: * sizeof long=4 [2024-09-13 10:27:51,712 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-09-13 10:27:51,713 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-09-13 10:27:51,713 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-09-13 10:27:51,713 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-09-13 10:27:51,714 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-09-13 10:27:51,714 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-09-13 10:27:51,714 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-09-13 10:27:51,715 INFO L153 SettingsManager]: * sizeof long double=12 [2024-09-13 10:27:51,715 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-09-13 10:27:51,715 INFO L153 SettingsManager]: * Use constant arrays=true [2024-09-13 10:27:51,715 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-09-13 10:27:51,716 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-09-13 10:27:51,716 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-09-13 10:27:51,716 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-09-13 10:27:51,716 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-13 10:27:51,721 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-09-13 10:27:51,721 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-09-13 10:27:51,722 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-09-13 10:27:51,722 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-09-13 10:27:51,722 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-09-13 10:27:51,722 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-09-13 10:27:51,722 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-09-13 10:27:51,722 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-09-13 10:27:51,725 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-09-13 10:27:51,725 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Positions where we compute the Hoare Annotation -> None [2024-09-13 10:27:51,964 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-09-13 10:27:51,987 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-09-13 10:27:51,991 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-09-13 10:27:51,992 INFO L270 PluginConnector]: Initializing CDTParser... [2024-09-13 10:27:51,993 INFO L274 PluginConnector]: CDTParser initialized [2024-09-13 10:27:51,994 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/certificate-witnesses-artifact/automizer/../sv-benchmarks/c/recursive-simple/fibo_7-1.c [2024-09-13 10:27:53,374 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-09-13 10:27:53,574 INFO L384 CDTParser]: Found 1 translation units. [2024-09-13 10:27:53,574 INFO L180 CDTParser]: Scanning /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/recursive-simple/fibo_7-1.c [2024-09-13 10:27:53,581 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/certificate-witnesses-artifact/automizer/data/54ccd4c90/4521774a819741e794e87d8dc4d162d6/FLAGfe09e3f48 [2024-09-13 10:27:53,949 INFO L435 CDTParser]: Successfully deleted /storage/repos/certificate-witnesses-artifact/automizer/data/54ccd4c90/4521774a819741e794e87d8dc4d162d6 [2024-09-13 10:27:53,952 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-09-13 10:27:53,953 INFO L274 PluginConnector]: Witness Parser initialized [2024-09-13 10:27:53,954 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/certificate-witnesses-artifact/automizer/../results/automizer-verification-files/SV-COMP24_unreach-call/fibo_7-1.yml/witness-2.1.yml [2024-09-13 10:27:53,997 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-09-13 10:27:53,998 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-09-13 10:27:53,999 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-09-13 10:27:53,999 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-09-13 10:27:54,004 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-09-13 10:27:54,005 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.09 10:27:53" (1/2) ... [2024-09-13 10:27:54,008 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2d16f58f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 10:27:54, skipping insertion in model container [2024-09-13 10:27:54,008 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.09 10:27:53" (1/2) ... [2024-09-13 10:27:54,009 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@4dd17dba and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 10:27:54, skipping insertion in model container [2024-09-13 10:27:54,010 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 10:27:53" (2/2) ... [2024-09-13 10:27:54,010 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2d16f58f and model type witness-2.1.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 13.09 10:27:54, skipping insertion in model container [2024-09-13 10:27:54,010 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 10:27:53" (2/2) ... [2024-09-13 10:27:54,015 INFO L93 nessWitnessExtractor]: Found the following entries in the witness: [2024-09-13 10:27:54,018 INFO L1541 ArrayList]: Function contract at [L7]: requires null, ensures ((0 < \old(n)) || (\result == 0)) [2024-09-13 10:27:54,035 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-09-13 10:27:54,178 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_7-1.c[741,754] [2024-09-13 10:27:54,182 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-13 10:27:54,197 INFO L200 MainTranslator]: Completed pre-run Start Parsing Global [2024-09-13 10:27:54,237 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_7-1.c[741,754] [2024-09-13 10:27:54,238 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-13 10:27:54,253 INFO L204 MainTranslator]: Completed translation [2024-09-13 10:27:54,253 INFO L201 PluginConnector]: Adding new model witness-2.1.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 13.09 10:27:54 WrapperNode [2024-09-13 10:27:54,254 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-09-13 10:27:54,255 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-09-13 10:27:54,255 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-09-13 10:27:54,256 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-09-13 10:27:54,263 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 10:27:54" (1/1) ... [2024-09-13 10:27:54,268 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 10:27:54" (1/1) ... [2024-09-13 10:27:54,283 INFO L138 Inliner]: procedures = 13, calls = 10, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 20 [2024-09-13 10:27:54,283 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-09-13 10:27:54,284 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-09-13 10:27:54,284 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-09-13 10:27:54,284 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-09-13 10:27:54,294 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 10:27:54" (1/1) ... [2024-09-13 10:27:54,295 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 10:27:54" (1/1) ... [2024-09-13 10:27:54,296 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 10:27:54" (1/1) ... [2024-09-13 10:27:54,304 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 10:27:54,305 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 10:27:54" (1/1) ... [2024-09-13 10:27:54,305 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 10:27:54" (1/1) ... [2024-09-13 10:27:54,312 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 10:27:54" (1/1) ... [2024-09-13 10:27:54,316 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 10:27:54" (1/1) ... [2024-09-13 10:27:54,317 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 10:27:54" (1/1) ... [2024-09-13 10:27:54,317 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 10:27:54" (1/1) ... [2024-09-13 10:27:54,319 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-09-13 10:27:54,321 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-09-13 10:27:54,321 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-09-13 10:27:54,321 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-09-13 10:27:54,322 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 10:27:54" (1/1) ... [2024-09-13 10:27:54,327 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-13 10:27:54,334 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 10:27:54,350 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 10:27:54,357 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 10:27:54,401 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-09-13 10:27:54,403 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-09-13 10:27:54,403 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-09-13 10:27:54,403 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2024-09-13 10:27:54,403 INFO L130 BoogieDeclarations]: Found specification of procedure fibo [2024-09-13 10:27:54,403 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo [2024-09-13 10:27:54,468 INFO L242 CfgBuilder]: Building ICFG [2024-09-13 10:27:54,470 INFO L268 CfgBuilder]: Building CFG for each procedure with an implementation [2024-09-13 10:27:54,603 INFO L? ?]: Removed 9 outVars from TransFormulas that were not future-live. [2024-09-13 10:27:54,603 INFO L291 CfgBuilder]: Performing block encoding [2024-09-13 10:27:54,635 INFO L313 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-09-13 10:27:54,635 INFO L318 CfgBuilder]: Removed 0 assume(true) statements. [2024-09-13 10:27:54,635 INFO L201 PluginConnector]: Adding new model witness-2.1.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.09 10:27:54 BoogieIcfgContainer [2024-09-13 10:27:54,636 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-09-13 10:27:54,638 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-09-13 10:27:54,639 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-09-13 10:27:54,642 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-09-13 10:27:54,642 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.09 10:27:53" (1/4) ... [2024-09-13 10:27:54,644 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@50614d9b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.09 10:27:54, skipping insertion in model container [2024-09-13 10:27:54,644 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 10:27:53" (2/4) ... [2024-09-13 10:27:54,645 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@50614d9b and model type witness-2.1.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 13.09 10:27:54, skipping insertion in model container [2024-09-13 10:27:54,645 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 10:27:54" (3/4) ... [2024-09-13 10:27:54,645 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@50614d9b and model type witness-2.1.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 13.09 10:27:54, skipping insertion in model container [2024-09-13 10:27:54,646 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 10:27:54" (4/4) ... [2024-09-13 10:27:54,647 INFO L112 eAbstractionObserver]: Analyzing ICFG fibo_7-1.c [2024-09-13 10:27:54,664 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-09-13 10:27:54,664 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2024-09-13 10:27:54,711 INFO L335 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-09-13 10:27:54,719 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;@31f949e3, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-09-13 10:27:54,720 INFO L337 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2024-09-13 10:27:54,723 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 10:27:54,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2024-09-13 10:27:54,730 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 10:27:54,730 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2024-09-13 10:27:54,731 INFO L399 AbstractCegarLoop]: === Iteration 1 === Targeting fiboErr0ENSURES_VIOLATIONPOST_CONDITION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, fiboErr0ENSURES_VIOLATIONPOST_CONDITION] === [2024-09-13 10:27:54,737 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 10:27:54,738 INFO L85 PathProgramCache]: Analyzing trace with hash 65647554, now seen corresponding path program 1 times [2024-09-13 10:27:54,747 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 10:27:54,747 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1789522241] [2024-09-13 10:27:54,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 10:27:54,748 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 10:27:54,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:27:54,884 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 10:27:54,885 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 10:27:54,885 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1789522241] [2024-09-13 10:27:54,886 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1789522241] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-13 10:27:54,886 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-13 10:27:54,886 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-09-13 10:27:54,887 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1869324967] [2024-09-13 10:27:54,888 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-13 10:27:54,893 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-09-13 10:27:54,893 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 10:27:54,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-09-13 10:27:54,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-09-13 10:27:54,924 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 3 states, 2 states have (on average 2.0) internal successors, (4), 3 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 10:27:54,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 10:27:54,957 INFO L93 Difference]: Finished difference Result 20 states and 25 transitions. [2024-09-13 10:27:54,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-09-13 10:27:54,960 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 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 10:27:54,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 10:27:54,966 INFO L225 Difference]: With dead ends: 20 [2024-09-13 10:27:54,966 INFO L226 Difference]: Without dead ends: 18 [2024-09-13 10:27:54,968 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-09-13 10:27:54,973 INFO L434 NwaCegarLoop]: 18 mSDtfsCounter, 1 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-13 10:27:54,974 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 32 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-13 10:27:54,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2024-09-13 10:27:55,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 17. [2024-09-13 10:27:55,007 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 10:27:55,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 20 transitions. [2024-09-13 10:27:55,010 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 20 transitions. Word has length 5 [2024-09-13 10:27:55,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 10:27:55,011 INFO L474 AbstractCegarLoop]: Abstraction has 17 states and 20 transitions. [2024-09-13 10:27:55,011 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 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 10:27:55,012 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 20 transitions. [2024-09-13 10:27:55,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2024-09-13 10:27:55,013 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 10:27:55,013 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2024-09-13 10:27:55,013 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-09-13 10:27:55,014 INFO L399 AbstractCegarLoop]: === Iteration 2 === Targeting fiboErr0ENSURES_VIOLATIONPOST_CONDITION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, fiboErr0ENSURES_VIOLATIONPOST_CONDITION] === [2024-09-13 10:27:55,014 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 10:27:55,015 INFO L85 PathProgramCache]: Analyzing trace with hash 2035074950, now seen corresponding path program 1 times [2024-09-13 10:27:55,015 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 10:27:55,015 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1050860050] [2024-09-13 10:27:55,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 10:27:55,016 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 10:27:55,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:27:55,094 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 10:27:55,095 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 10:27:55,095 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1050860050] [2024-09-13 10:27:55,095 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1050860050] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-13 10:27:55,096 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-13 10:27:55,096 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-09-13 10:27:55,096 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2046923003] [2024-09-13 10:27:55,096 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-13 10:27:55,097 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-09-13 10:27:55,097 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 10:27:55,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-09-13 10:27:55,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-09-13 10:27:55,099 INFO L87 Difference]: Start difference. First operand 17 states and 20 transitions. Second operand has 4 states, 2 states have (on average 2.5) 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 10:27:55,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 10:27:55,122 INFO L93 Difference]: Finished difference Result 27 states and 33 transitions. [2024-09-13 10:27:55,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-09-13 10:27:55,123 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 2 states have (on average 2.5) 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 10:27:55,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 10:27:55,124 INFO L225 Difference]: With dead ends: 27 [2024-09-13 10:27:55,124 INFO L226 Difference]: Without dead ends: 27 [2024-09-13 10:27:55,124 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 0 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 10:27:55,125 INFO L434 NwaCegarLoop]: 15 mSDtfsCounter, 8 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-13 10:27:55,126 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 36 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-13 10:27:55,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2024-09-13 10:27:55,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 26. [2024-09-13 10:27:55,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 17 states have (on average 1.2941176470588236) internal successors, (22), 18 states have internal predecessors, (22), 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 10:27:55,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 32 transitions. [2024-09-13 10:27:55,131 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 32 transitions. Word has length 6 [2024-09-13 10:27:55,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 10:27:55,132 INFO L474 AbstractCegarLoop]: Abstraction has 26 states and 32 transitions. [2024-09-13 10:27:55,132 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 2 states have (on average 2.5) 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 10:27:55,132 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 32 transitions. [2024-09-13 10:27:55,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2024-09-13 10:27:55,133 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 10:27:55,133 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 10:27:55,133 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-09-13 10:27:55,134 INFO L399 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, fiboErr0ENSURES_VIOLATIONPOST_CONDITION] === [2024-09-13 10:27:55,137 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 10:27:55,138 INFO L85 PathProgramCache]: Analyzing trace with hash -863539259, now seen corresponding path program 1 times [2024-09-13 10:27:55,138 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 10:27:55,138 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [236950840] [2024-09-13 10:27:55,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 10:27:55,138 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 10:27:55,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:27:55,227 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-09-13 10:27:55,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:27:55,292 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 10:27:55,292 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 10:27:55,293 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [236950840] [2024-09-13 10:27:55,293 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [236950840] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-13 10:27:55,293 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-13 10:27:55,293 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-13 10:27:55,293 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1540116580] [2024-09-13 10:27:55,293 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-13 10:27:55,294 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-13 10:27:55,294 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 10:27:55,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-13 10:27:55,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-13 10:27:55,300 INFO L87 Difference]: Start difference. First operand 26 states and 32 transitions. Second operand has 5 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-13 10:27:55,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 10:27:55,400 INFO L93 Difference]: Finished difference Result 34 states and 45 transitions. [2024-09-13 10:27:55,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-09-13 10:27:55,402 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 9 [2024-09-13 10:27:55,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 10:27:55,403 INFO L225 Difference]: With dead ends: 34 [2024-09-13 10:27:55,404 INFO L226 Difference]: Without dead ends: 32 [2024-09-13 10:27:55,404 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-09-13 10:27:55,405 INFO L434 NwaCegarLoop]: 11 mSDtfsCounter, 9 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-13 10:27:55,407 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 26 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-13 10:27:55,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2024-09-13 10:27:55,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 26. [2024-09-13 10:27:55,418 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 10:27:55,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 31 transitions. [2024-09-13 10:27:55,421 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 31 transitions. Word has length 9 [2024-09-13 10:27:55,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 10:27:55,421 INFO L474 AbstractCegarLoop]: Abstraction has 26 states and 31 transitions. [2024-09-13 10:27:55,422 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-13 10:27:55,422 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 31 transitions. [2024-09-13 10:27:55,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2024-09-13 10:27:55,422 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 10:27:55,423 INFO L216 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1] [2024-09-13 10:27:55,423 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-09-13 10:27:55,423 INFO L399 AbstractCegarLoop]: === Iteration 4 === Targeting fiboErr0ENSURES_VIOLATIONPOST_CONDITION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, fiboErr0ENSURES_VIOLATIONPOST_CONDITION] === [2024-09-13 10:27:55,424 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 10:27:55,424 INFO L85 PathProgramCache]: Analyzing trace with hash -254199789, now seen corresponding path program 1 times [2024-09-13 10:27:55,425 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 10:27:55,426 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [152510364] [2024-09-13 10:27:55,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 10:27:55,427 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 10:27:55,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:27:55,504 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-13 10:27:55,505 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 10:27:55,505 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [152510364] [2024-09-13 10:27:55,505 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [152510364] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 10:27:55,506 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [910113577] [2024-09-13 10:27:55,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 10:27:55,506 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 10:27:55,506 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 10:27:55,508 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 10:27:55,510 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 10:27:55,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:27:55,563 INFO L262 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-09-13 10:27:55,569 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 10:27:55,664 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 10:27:55,665 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 10:27:55,706 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 10:27:55,707 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [910113577] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 10:27:55,707 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-13 10:27:55,707 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 10 [2024-09-13 10:27:55,707 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [409024930] [2024-09-13 10:27:55,707 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-13 10:27:55,708 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-09-13 10:27:55,708 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 10:27:55,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-09-13 10:27:55,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2024-09-13 10:27:55,709 INFO L87 Difference]: Start difference. First operand 26 states and 31 transitions. Second operand has 11 states, 8 states have (on average 2.5) internal successors, (20), 9 states have internal predecessors, (20), 5 states have call successors, (5), 5 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-13 10:27:55,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 10:27:55,945 INFO L93 Difference]: Finished difference Result 58 states and 72 transitions. [2024-09-13 10:27:55,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-09-13 10:27:55,946 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 8 states have (on average 2.5) internal successors, (20), 9 states have internal predecessors, (20), 5 states have call successors, (5), 5 states have call predecessors, (5), 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 10:27:55,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 10:27:55,947 INFO L225 Difference]: With dead ends: 58 [2024-09-13 10:27:55,948 INFO L226 Difference]: Without dead ends: 58 [2024-09-13 10:27:55,948 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=70, Invalid=170, Unknown=0, NotChecked=0, Total=240 [2024-09-13 10:27:55,949 INFO L434 NwaCegarLoop]: 16 mSDtfsCounter, 43 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 111 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 136 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-13 10:27:55,950 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 63 Invalid, 136 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 111 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-13 10:27:55,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2024-09-13 10:27:55,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 53. [2024-09-13 10:27:55,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 35 states have (on average 1.1142857142857143) internal successors, (39), 36 states have internal predecessors, (39), 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 10:27:55,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 61 transitions. [2024-09-13 10:27:55,965 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 61 transitions. Word has length 10 [2024-09-13 10:27:55,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 10:27:55,965 INFO L474 AbstractCegarLoop]: Abstraction has 53 states and 61 transitions. [2024-09-13 10:27:55,966 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 8 states have (on average 2.5) internal successors, (20), 9 states have internal predecessors, (20), 5 states have call successors, (5), 5 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-13 10:27:55,966 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 61 transitions. [2024-09-13 10:27:55,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2024-09-13 10:27:55,967 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 10:27:55,967 INFO L216 NwaCegarLoop]: trace histogram [4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 10:27:55,979 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-09-13 10:27:56,167 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 10:27:56,168 INFO L399 AbstractCegarLoop]: === Iteration 5 === Targeting fiboErr0ENSURES_VIOLATIONPOST_CONDITION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, fiboErr0ENSURES_VIOLATIONPOST_CONDITION] === [2024-09-13 10:27:56,168 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 10:27:56,169 INFO L85 PathProgramCache]: Analyzing trace with hash -653490791, now seen corresponding path program 1 times [2024-09-13 10:27:56,169 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 10:27:56,169 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1856371607] [2024-09-13 10:27:56,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 10:27:56,169 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 10:27:56,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:27:56,240 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2024-09-13 10:27:56,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:27:56,250 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2024-09-13 10:27:56,251 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 10:27:56,251 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1856371607] [2024-09-13 10:27:56,251 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1856371607] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-13 10:27:56,251 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-13 10:27:56,251 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-09-13 10:27:56,252 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [733402791] [2024-09-13 10:27:56,252 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-13 10:27:56,252 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-09-13 10:27:56,252 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 10:27:56,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-09-13 10:27:56,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-09-13 10:27:56,254 INFO L87 Difference]: Start difference. First operand 53 states and 61 transitions. Second operand has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-13 10:27:56,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 10:27:56,300 INFO L93 Difference]: Finished difference Result 57 states and 74 transitions. [2024-09-13 10:27:56,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-13 10:27:56,302 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 21 [2024-09-13 10:27:56,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 10:27:56,303 INFO L225 Difference]: With dead ends: 57 [2024-09-13 10:27:56,303 INFO L226 Difference]: Without dead ends: 57 [2024-09-13 10:27:56,304 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-09-13 10:27:56,304 INFO L434 NwaCegarLoop]: 10 mSDtfsCounter, 9 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-13 10:27:56,305 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 16 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-13 10:27:56,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2024-09-13 10:27:56,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 51. [2024-09-13 10:27:56,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 34 states have (on average 1.088235294117647) internal successors, (37), 34 states have internal predecessors, (37), 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 10:27:56,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 59 transitions. [2024-09-13 10:27:56,319 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 59 transitions. Word has length 21 [2024-09-13 10:27:56,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 10:27:56,319 INFO L474 AbstractCegarLoop]: Abstraction has 51 states and 59 transitions. [2024-09-13 10:27:56,320 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-13 10:27:56,320 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 59 transitions. [2024-09-13 10:27:56,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2024-09-13 10:27:56,321 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 10:27:56,322 INFO L216 NwaCegarLoop]: trace histogram [7, 7, 5, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1] [2024-09-13 10:27:56,322 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-09-13 10:27:56,322 INFO L399 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, fiboErr0ENSURES_VIOLATIONPOST_CONDITION] === [2024-09-13 10:27:56,323 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 10:27:56,323 INFO L85 PathProgramCache]: Analyzing trace with hash -1794737922, now seen corresponding path program 1 times [2024-09-13 10:27:56,323 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 10:27:56,323 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1857671558] [2024-09-13 10:27:56,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 10:27:56,324 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 10:27:56,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:27:56,465 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-09-13 10:27:56,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:27:56,560 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-13 10:27:56,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:27:56,605 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-13 10:27:56,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:27:56,623 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-13 10:27:56,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:27:56,629 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-09-13 10:27:56,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:27:56,690 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-13 10:27:56,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:27:56,695 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-13 10:27:56,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:27:56,702 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 34 proven. 34 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2024-09-13 10:27:56,702 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 10:27:56,703 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1857671558] [2024-09-13 10:27:56,703 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1857671558] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 10:27:56,703 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [473714284] [2024-09-13 10:27:56,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 10:27:56,703 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 10:27:56,703 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 10:27:56,705 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 10:27:56,707 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 10:27:56,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:27:56,755 INFO L262 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-09-13 10:27:56,758 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 10:27:56,830 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 11 proven. 48 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2024-09-13 10:27:56,834 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 10:27:57,222 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 11 proven. 55 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-09-13 10:27:57,222 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [473714284] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 10:27:57,223 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-13 10:27:57,223 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 7, 9] total 17 [2024-09-13 10:27:57,223 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2054711346] [2024-09-13 10:27:57,223 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-13 10:27:57,224 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-09-13 10:27:57,224 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 10:27:57,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-09-13 10:27:57,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2024-09-13 10:27:57,225 INFO L87 Difference]: Start difference. First operand 51 states and 59 transitions. Second operand has 17 states, 15 states have (on average 3.066666666666667) internal successors, (46), 17 states have internal predecessors, (46), 12 states have call successors, (14), 1 states have call predecessors, (14), 6 states have return successors, (17), 8 states have call predecessors, (17), 12 states have call successors, (17) [2024-09-13 10:27:57,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 10:27:57,390 INFO L93 Difference]: Finished difference Result 103 states and 137 transitions. [2024-09-13 10:27:57,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-09-13 10:27:57,391 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 15 states have (on average 3.066666666666667) internal successors, (46), 17 states have internal predecessors, (46), 12 states have call successors, (14), 1 states have call predecessors, (14), 6 states have return successors, (17), 8 states have call predecessors, (17), 12 states have call successors, (17) Word has length 50 [2024-09-13 10:27:57,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 10:27:57,396 INFO L225 Difference]: With dead ends: 103 [2024-09-13 10:27:57,396 INFO L226 Difference]: Without dead ends: 93 [2024-09-13 10:27:57,396 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 104 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=121, Invalid=299, Unknown=0, NotChecked=0, Total=420 [2024-09-13 10:27:57,400 INFO L434 NwaCegarLoop]: 8 mSDtfsCounter, 40 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 117 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 159 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-13 10:27:57,400 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 38 Invalid, 159 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 117 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-13 10:27:57,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2024-09-13 10:27:57,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 71. [2024-09-13 10:27:57,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 46 states have (on average 1.0869565217391304) internal successors, (50), 47 states have internal predecessors, (50), 16 states have call successors, (16), 6 states have call predecessors, (16), 8 states have return successors, (27), 17 states have call predecessors, (27), 16 states have call successors, (27) [2024-09-13 10:27:57,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 93 transitions. [2024-09-13 10:27:57,418 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 93 transitions. Word has length 50 [2024-09-13 10:27:57,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 10:27:57,419 INFO L474 AbstractCegarLoop]: Abstraction has 71 states and 93 transitions. [2024-09-13 10:27:57,419 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 15 states have (on average 3.066666666666667) internal successors, (46), 17 states have internal predecessors, (46), 12 states have call successors, (14), 1 states have call predecessors, (14), 6 states have return successors, (17), 8 states have call predecessors, (17), 12 states have call successors, (17) [2024-09-13 10:27:57,419 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 93 transitions. [2024-09-13 10:27:57,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2024-09-13 10:27:57,421 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 10:27:57,421 INFO L216 NwaCegarLoop]: trace histogram [9, 9, 6, 4, 4, 4, 4, 4, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1] [2024-09-13 10:27:57,434 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-09-13 10:27:57,623 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-09-13 10:27:57,624 INFO L399 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, fiboErr0ENSURES_VIOLATIONPOST_CONDITION] === [2024-09-13 10:27:57,624 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 10:27:57,624 INFO L85 PathProgramCache]: Analyzing trace with hash -1581951029, now seen corresponding path program 2 times [2024-09-13 10:27:57,624 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 10:27:57,624 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [16292822] [2024-09-13 10:27:57,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 10:27:57,625 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 10:27:57,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:27:57,691 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-09-13 10:27:57,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:27:57,756 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-13 10:27:57,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:27:57,811 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-13 10:27:57,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:27:57,872 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-13 10:27:57,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:27:57,878 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-13 10:27:57,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:27:57,883 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-09-13 10:27:57,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:27:57,901 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2024-09-13 10:27:57,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:27:57,907 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-13 10:27:57,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:27:57,910 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-13 10:27:57,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:27:57,913 INFO L134 CoverageAnalysis]: Checked inductivity of 183 backedges. 47 proven. 42 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2024-09-13 10:27:57,913 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 10:27:57,913 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [16292822] [2024-09-13 10:27:57,914 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [16292822] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 10:27:57,914 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [137693416] [2024-09-13 10:27:57,914 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-13 10:27:57,914 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 10:27:57,915 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 10:27:57,916 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 10:27:57,919 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 10:27:57,975 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-13 10:27:57,975 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 10:27:57,976 INFO L262 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-09-13 10:27:57,978 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 10:27:58,099 INFO L134 CoverageAnalysis]: Checked inductivity of 183 backedges. 17 proven. 84 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2024-09-13 10:27:58,100 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 10:27:58,696 INFO L134 CoverageAnalysis]: Checked inductivity of 183 backedges. 17 proven. 99 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2024-09-13 10:27:58,697 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [137693416] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 10:27:58,697 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-13 10:27:58,697 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 11] total 19 [2024-09-13 10:27:58,697 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1567827997] [2024-09-13 10:27:58,697 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-13 10:27:58,699 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-09-13 10:27:58,699 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 10:27:58,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-09-13 10:27:58,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=257, Unknown=0, NotChecked=0, Total=342 [2024-09-13 10:27:58,700 INFO L87 Difference]: Start difference. First operand 71 states and 93 transitions. Second operand has 19 states, 17 states have (on average 3.0588235294117645) internal successors, (52), 19 states have internal predecessors, (52), 13 states have call successors, (16), 1 states have call predecessors, (16), 8 states have return successors, (20), 8 states have call predecessors, (20), 13 states have call successors, (20) [2024-09-13 10:27:58,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 10:27:58,954 INFO L93 Difference]: Finished difference Result 133 states and 183 transitions. [2024-09-13 10:27:58,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-09-13 10:27:58,954 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 17 states have (on average 3.0588235294117645) internal successors, (52), 19 states have internal predecessors, (52), 13 states have call successors, (16), 1 states have call predecessors, (16), 8 states have return successors, (20), 8 states have call predecessors, (20), 13 states have call successors, (20) Word has length 63 [2024-09-13 10:27:58,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 10:27:58,957 INFO L225 Difference]: With dead ends: 133 [2024-09-13 10:27:58,957 INFO L226 Difference]: Without dead ends: 114 [2024-09-13 10:27:58,957 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 130 SyntacticMatches, 4 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=211, Invalid=545, Unknown=0, NotChecked=0, Total=756 [2024-09-13 10:27:58,958 INFO L434 NwaCegarLoop]: 12 mSDtfsCounter, 45 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 213 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 263 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 213 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-13 10:27:58,959 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 65 Invalid, 263 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 213 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-13 10:27:58,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2024-09-13 10:27:58,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 96. [2024-09-13 10:27:58,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 63 states have (on average 1.0952380952380953) internal successors, (69), 63 states have internal predecessors, (69), 21 states have call successors, (21), 9 states have call predecessors, (21), 11 states have return successors, (40), 23 states have call predecessors, (40), 21 states have call successors, (40) [2024-09-13 10:27:58,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 130 transitions. [2024-09-13 10:27:58,970 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 130 transitions. Word has length 63 [2024-09-13 10:27:58,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 10:27:58,970 INFO L474 AbstractCegarLoop]: Abstraction has 96 states and 130 transitions. [2024-09-13 10:27:58,971 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 17 states have (on average 3.0588235294117645) internal successors, (52), 19 states have internal predecessors, (52), 13 states have call successors, (16), 1 states have call predecessors, (16), 8 states have return successors, (20), 8 states have call predecessors, (20), 13 states have call successors, (20) [2024-09-13 10:27:58,971 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 130 transitions. [2024-09-13 10:27:58,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2024-09-13 10:27:58,973 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 10:27:58,973 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 10:27:58,993 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 10:27:59,175 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2024-09-13 10:27:59,176 INFO L399 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, fiboErr0ENSURES_VIOLATIONPOST_CONDITION] === [2024-09-13 10:27:59,176 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 10:27:59,176 INFO L85 PathProgramCache]: Analyzing trace with hash -151965584, now seen corresponding path program 3 times [2024-09-13 10:27:59,176 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 10:27:59,176 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [502285618] [2024-09-13 10:27:59,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 10:27:59,176 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 10:27:59,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:27:59,286 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-09-13 10:27:59,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:27:59,395 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-13 10:27:59,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:27:59,515 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-13 10:27:59,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:27:59,563 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-13 10:27:59,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:27:59,607 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-13 10:27:59,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:27:59,624 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-13 10:27:59,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:27:59,631 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-09-13 10:27:59,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:27:59,636 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2024-09-13 10:27:59,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:27:59,652 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-13 10:27:59,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:27:59,655 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-13 10:27:59,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:27:59,658 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2024-09-13 10:27:59,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:27:59,678 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-13 10:27:59,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:27:59,682 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-13 10:27:59,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:27:59,685 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-13 10:27:59,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:27:59,687 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-09-13 10:27:59,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:27:59,690 INFO L134 CoverageAnalysis]: Checked inductivity of 570 backedges. 42 proven. 229 refuted. 0 times theorem prover too weak. 299 trivial. 0 not checked. [2024-09-13 10:27:59,690 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 10:27:59,690 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [502285618] [2024-09-13 10:27:59,690 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [502285618] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 10:27:59,690 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [283935220] [2024-09-13 10:27:59,691 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-13 10:27:59,691 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 10:27:59,691 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 10:27:59,693 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 10:27:59,694 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 10:27:59,751 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2024-09-13 10:27:59,751 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 10:27:59,752 INFO L262 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-09-13 10:27:59,755 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 10:27:59,808 INFO L134 CoverageAnalysis]: Checked inductivity of 570 backedges. 141 proven. 41 refuted. 0 times theorem prover too weak. 388 trivial. 0 not checked. [2024-09-13 10:27:59,809 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 10:28:00,221 INFO L134 CoverageAnalysis]: Checked inductivity of 570 backedges. 141 proven. 50 refuted. 0 times theorem prover too weak. 379 trivial. 0 not checked. [2024-09-13 10:28:00,221 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [283935220] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 10:28:00,221 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-13 10:28:00,221 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 7, 9] total 18 [2024-09-13 10:28:00,222 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [868286032] [2024-09-13 10:28:00,222 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-13 10:28:00,222 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-09-13 10:28:00,223 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 10:28:00,223 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-09-13 10:28:00,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=210, Unknown=0, NotChecked=0, Total=306 [2024-09-13 10:28:00,224 INFO L87 Difference]: Start difference. First operand 96 states and 130 transitions. Second operand has 18 states, 16 states have (on average 2.875) internal successors, (46), 18 states have internal predecessors, (46), 11 states have call successors, (15), 1 states have call predecessors, (15), 6 states have return successors, (19), 13 states have call predecessors, (19), 11 states have call successors, (19) [2024-09-13 10:28:00,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 10:28:00,395 INFO L93 Difference]: Finished difference Result 214 states and 325 transitions. [2024-09-13 10:28:00,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-09-13 10:28:00,398 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 16 states have (on average 2.875) internal successors, (46), 18 states have internal predecessors, (46), 11 states have call successors, (15), 1 states have call predecessors, (15), 6 states have return successors, (19), 13 states have call predecessors, (19), 11 states have call successors, (19) Word has length 105 [2024-09-13 10:28:00,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 10:28:00,404 INFO L225 Difference]: With dead ends: 214 [2024-09-13 10:28:00,404 INFO L226 Difference]: Without dead ends: 191 [2024-09-13 10:28:00,404 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 250 GetRequests, 230 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=112, Invalid=230, Unknown=0, NotChecked=0, Total=342 [2024-09-13 10:28:00,405 INFO L434 NwaCegarLoop]: 14 mSDtfsCounter, 37 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 189 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 218 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 189 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-13 10:28:00,405 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 56 Invalid, 218 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 189 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-13 10:28:00,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2024-09-13 10:28:00,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 173. [2024-09-13 10:28:00,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 111 states have (on average 1.1261261261261262) internal successors, (125), 111 states have internal predecessors, (125), 41 states have call successors, (41), 14 states have call predecessors, (41), 20 states have return successors, (92), 47 states have call predecessors, (92), 41 states have call successors, (92) [2024-09-13 10:28:00,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 258 transitions. [2024-09-13 10:28:00,439 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 258 transitions. Word has length 105 [2024-09-13 10:28:00,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 10:28:00,440 INFO L474 AbstractCegarLoop]: Abstraction has 173 states and 258 transitions. [2024-09-13 10:28:00,440 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 16 states have (on average 2.875) internal successors, (46), 18 states have internal predecessors, (46), 11 states have call successors, (15), 1 states have call predecessors, (15), 6 states have return successors, (19), 13 states have call predecessors, (19), 11 states have call successors, (19) [2024-09-13 10:28:00,440 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 258 transitions. [2024-09-13 10:28:00,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2024-09-13 10:28:00,444 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 10:28:00,444 INFO L216 NwaCegarLoop]: trace histogram [25, 25, 20, 12, 12, 12, 12, 12, 12, 12, 8, 5, 1, 1, 1, 1, 1, 1] [2024-09-13 10:28:00,460 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 10:28:00,647 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 10:28:00,648 INFO L399 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, fiboErr0ENSURES_VIOLATIONPOST_CONDITION] === [2024-09-13 10:28:00,648 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 10:28:00,648 INFO L85 PathProgramCache]: Analyzing trace with hash 320903265, now seen corresponding path program 4 times [2024-09-13 10:28:00,648 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 10:28:00,648 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [543502890] [2024-09-13 10:28:00,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 10:28:00,648 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 10:28:00,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:28:00,846 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-09-13 10:28:00,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:28:00,996 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-13 10:28:01,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:28:01,100 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-13 10:28:01,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:28:01,168 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-13 10:28:01,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:28:01,212 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-13 10:28:01,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:28:01,248 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-13 10:28:01,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:28:01,264 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-13 10:28:01,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:28:01,268 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-09-13 10:28:01,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:28:01,274 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2024-09-13 10:28:01,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:28:01,282 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-13 10:28:01,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:28:01,284 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-13 10:28:01,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:28:01,286 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2024-09-13 10:28:01,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:28:01,297 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-13 10:28:01,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:28:01,302 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-13 10:28:01,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:28:01,303 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-13 10:28:01,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:28:01,305 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-09-13 10:28:01,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:28:01,307 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2024-09-13 10:28:01,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:28:01,324 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-13 10:28:01,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:28:01,330 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-13 10:28:01,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:28:01,334 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-13 10:28:01,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:28:01,336 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-13 10:28:01,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:28:01,338 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-09-13 10:28:01,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:28:01,339 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2024-09-13 10:28:01,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:28:01,343 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-13 10:28:01,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:28:01,345 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-13 10:28:01,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:28:01,349 INFO L134 CoverageAnalysis]: Checked inductivity of 1654 backedges. 93 proven. 533 refuted. 0 times theorem prover too weak. 1028 trivial. 0 not checked. [2024-09-13 10:28:01,349 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 10:28:01,349 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [543502890] [2024-09-13 10:28:01,349 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [543502890] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 10:28:01,349 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [529670614] [2024-09-13 10:28:01,349 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-13 10:28:01,349 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 10:28:01,350 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 10:28:01,351 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 10:28:01,353 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 10:28:01,444 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-13 10:28:01,444 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 10:28:01,446 INFO L262 TraceCheckSpWp]: Trace formula consists of 405 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-09-13 10:28:01,450 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 10:28:01,542 INFO L134 CoverageAnalysis]: Checked inductivity of 1654 backedges. 93 proven. 533 refuted. 0 times theorem prover too weak. 1028 trivial. 0 not checked. [2024-09-13 10:28:01,542 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 10:28:02,881 INFO L134 CoverageAnalysis]: Checked inductivity of 1654 backedges. 93 proven. 573 refuted. 0 times theorem prover too weak. 988 trivial. 0 not checked. [2024-09-13 10:28:02,882 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [529670614] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 10:28:02,882 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-13 10:28:02,882 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 10, 15] total 22 [2024-09-13 10:28:02,882 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1036910751] [2024-09-13 10:28:02,882 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-13 10:28:02,883 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-09-13 10:28:02,883 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 10:28:02,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-09-13 10:28:02,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=307, Unknown=0, NotChecked=0, Total=462 [2024-09-13 10:28:02,885 INFO L87 Difference]: Start difference. First operand 173 states and 258 transitions. Second operand has 22 states, 21 states have (on average 2.8095238095238093) internal successors, (59), 22 states have internal predecessors, (59), 19 states have call successors, (20), 1 states have call predecessors, (20), 7 states have return successors, (28), 12 states have call predecessors, (28), 19 states have call successors, (28) [2024-09-13 10:28:03,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 10:28:03,124 INFO L93 Difference]: Finished difference Result 372 states and 610 transitions. [2024-09-13 10:28:03,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-09-13 10:28:03,125 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 2.8095238095238093) internal successors, (59), 22 states have internal predecessors, (59), 19 states have call successors, (20), 1 states have call predecessors, (20), 7 states have return successors, (28), 12 states have call predecessors, (28), 19 states have call successors, (28) Word has length 173 [2024-09-13 10:28:03,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 10:28:03,129 INFO L225 Difference]: With dead ends: 372 [2024-09-13 10:28:03,129 INFO L226 Difference]: Without dead ends: 349 [2024-09-13 10:28:03,130 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 408 GetRequests, 380 SyntacticMatches, 7 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 296 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=176, Invalid=330, Unknown=0, NotChecked=0, Total=506 [2024-09-13 10:28:03,130 INFO L434 NwaCegarLoop]: 14 mSDtfsCounter, 83 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 187 mSolverCounterSat, 123 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 310 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 123 IncrementalHoareTripleChecker+Valid, 187 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-13 10:28:03,131 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [95 Valid, 61 Invalid, 310 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [123 Valid, 187 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-13 10:28:03,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 349 states. [2024-09-13 10:28:03,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 349 to 331. [2024-09-13 10:28:03,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 331 states, 209 states have (on average 1.1435406698564594) internal successors, (239), 209 states have internal predecessors, (239), 83 states have call successors, (83), 24 states have call predecessors, (83), 38 states have return successors, (221), 97 states have call predecessors, (221), 83 states have call successors, (221) [2024-09-13 10:28:03,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 331 states to 331 states and 543 transitions. [2024-09-13 10:28:03,179 INFO L78 Accepts]: Start accepts. Automaton has 331 states and 543 transitions. Word has length 173 [2024-09-13 10:28:03,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 10:28:03,181 INFO L474 AbstractCegarLoop]: Abstraction has 331 states and 543 transitions. [2024-09-13 10:28:03,181 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 2.8095238095238093) internal successors, (59), 22 states have internal predecessors, (59), 19 states have call successors, (20), 1 states have call predecessors, (20), 7 states have return successors, (28), 12 states have call predecessors, (28), 19 states have call successors, (28) [2024-09-13 10:28:03,181 INFO L276 IsEmpty]: Start isEmpty. Operand 331 states and 543 transitions. [2024-09-13 10:28:03,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 433 [2024-09-13 10:28:03,192 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 10:28:03,192 INFO L216 NwaCegarLoop]: trace histogram [63, 63, 51, 31, 31, 31, 31, 31, 31, 31, 20, 12, 1, 1, 1, 1, 1, 1] [2024-09-13 10:28:03,210 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 10:28:03,396 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 10:28:03,397 INFO L399 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, fiboErr0ENSURES_VIOLATIONPOST_CONDITION] === [2024-09-13 10:28:03,397 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 10:28:03,397 INFO L85 PathProgramCache]: Analyzing trace with hash -835938756, now seen corresponding path program 5 times [2024-09-13 10:28:03,397 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 10:28:03,397 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2050727607] [2024-09-13 10:28:03,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 10:28:03,398 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 10:28:03,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:28:03,836 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-09-13 10:28:03,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:28:04,312 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-13 10:28:04,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:28:04,481 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-13 10:28:04,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:28:04,565 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-13 10:28:04,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:28:04,623 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-13 10:28:04,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:28:04,668 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-13 10:28:04,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:28:04,703 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-13 10:28:04,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:28:04,721 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-13 10:28:04,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:28:04,726 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-09-13 10:28:04,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:28:04,731 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2024-09-13 10:28:04,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:28:04,739 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-13 10:28:04,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:28:04,744 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-13 10:28:04,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:28:04,746 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2024-09-13 10:28:04,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:28:04,756 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-13 10:28:04,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:28:04,759 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-13 10:28:04,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:28:04,762 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-13 10:28:04,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:28:04,764 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-09-13 10:28:04,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:28:04,766 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2024-09-13 10:28:04,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:28:04,783 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-13 10:28:04,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:28:04,789 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-13 10:28:04,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:28:04,794 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-13 10:28:04,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:28:04,796 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-13 10:28:04,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:28:04,798 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-09-13 10:28:04,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:28:04,800 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2024-09-13 10:28:04,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:28:04,803 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-13 10:28:04,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:28:04,805 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-13 10:28:04,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:28:04,807 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 173 [2024-09-13 10:28:04,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:28:05,018 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-13 10:28:05,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:28:05,134 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-13 10:28:05,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:28:05,208 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-13 10:28:05,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:28:05,220 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-13 10:28:05,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:28:05,225 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-13 10:28:05,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:28:05,228 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-13 10:28:05,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:28:05,229 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-13 10:28:05,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:28:05,231 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-09-13 10:28:05,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:28:05,232 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2024-09-13 10:28:05,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:28:05,235 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-13 10:28:05,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:28:05,236 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-13 10:28:05,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:28:05,238 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2024-09-13 10:28:05,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:28:05,280 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-13 10:28:05,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:28:05,325 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-13 10:28:05,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:28:05,328 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-13 10:28:05,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:28:05,331 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-09-13 10:28:05,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:28:05,335 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2024-09-13 10:28:05,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:28:05,350 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-13 10:28:05,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:28:05,355 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-13 10:28:05,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:28:05,359 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-13 10:28:05,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:28:05,360 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-13 10:28:05,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:28:05,362 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-09-13 10:28:05,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:28:05,363 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2024-09-13 10:28:05,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:28:05,366 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-13 10:28:05,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:28:05,368 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-13 10:28:05,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:28:05,370 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 173 [2024-09-13 10:28:05,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:28:05,387 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-13 10:28:05,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:28:05,395 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-13 10:28:05,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:28:05,400 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-13 10:28:05,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:28:05,403 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-13 10:28:05,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:28:05,405 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-13 10:28:05,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:28:05,406 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-09-13 10:28:05,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:28:05,408 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2024-09-13 10:28:05,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:28:05,411 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-13 10:28:05,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:28:05,412 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-13 10:28:05,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:28:05,414 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2024-09-13 10:28:05,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:28:05,419 INFO L134 CoverageAnalysis]: Checked inductivity of 10947 backedges. 1154 proven. 2268 refuted. 0 times theorem prover too weak. 7525 trivial. 0 not checked. [2024-09-13 10:28:05,419 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 10:28:05,419 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2050727607] [2024-09-13 10:28:05,419 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2050727607] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 10:28:05,419 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [253328588] [2024-09-13 10:28:05,420 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-13 10:28:05,420 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 10:28:05,420 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 10:28:05,423 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 10:28:05,424 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 10:28:05,669 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 49 check-sat command(s) [2024-09-13 10:28:05,669 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 10:28:05,673 INFO L262 TraceCheckSpWp]: Trace formula consists of 866 conjuncts, 26 conjuncts are in the unsatisfiable core [2024-09-13 10:28:05,680 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 10:28:05,869 INFO L134 CoverageAnalysis]: Checked inductivity of 10947 backedges. 1578 proven. 2093 refuted. 0 times theorem prover too weak. 7276 trivial. 0 not checked. [2024-09-13 10:28:05,869 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 10:28:09,376 INFO L134 CoverageAnalysis]: Checked inductivity of 10947 backedges. 1584 proven. 2164 refuted. 0 times theorem prover too weak. 7199 trivial. 0 not checked. [2024-09-13 10:28:09,376 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [253328588] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 10:28:09,376 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-13 10:28:09,377 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 17, 27] total 43 [2024-09-13 10:28:09,377 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [966001755] [2024-09-13 10:28:09,377 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-13 10:28:09,378 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2024-09-13 10:28:09,378 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 10:28:09,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2024-09-13 10:28:09,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=392, Invalid=1414, Unknown=0, NotChecked=0, Total=1806 [2024-09-13 10:28:09,380 INFO L87 Difference]: Start difference. First operand 331 states and 543 transitions. Second operand has 43 states, 42 states have (on average 2.738095238095238) internal successors, (115), 43 states have internal predecessors, (115), 35 states have call successors, (41), 1 states have call predecessors, (41), 16 states have return successors, (60), 29 states have call predecessors, (60), 35 states have call successors, (60) [2024-09-13 10:28:10,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 10:28:10,097 INFO L93 Difference]: Finished difference Result 142 states and 164 transitions. [2024-09-13 10:28:10,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2024-09-13 10:28:10,098 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 42 states have (on average 2.738095238095238) internal successors, (115), 43 states have internal predecessors, (115), 35 states have call successors, (41), 1 states have call predecessors, (41), 16 states have return successors, (60), 29 states have call predecessors, (60), 35 states have call successors, (60) Word has length 432 [2024-09-13 10:28:10,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 10:28:10,099 INFO L225 Difference]: With dead ends: 142 [2024-09-13 10:28:10,099 INFO L226 Difference]: Without dead ends: 142 [2024-09-13 10:28:10,101 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 1042 GetRequests, 960 SyntacticMatches, 11 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1660 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1294, Invalid=3962, Unknown=0, NotChecked=0, Total=5256 [2024-09-13 10:28:10,101 INFO L434 NwaCegarLoop]: 31 mSDtfsCounter, 87 mSDsluCounter, 115 mSDsCounter, 0 mSdLazyCounter, 697 mSolverCounterSat, 125 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 822 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 125 IncrementalHoareTripleChecker+Valid, 697 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-13 10:28:10,102 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [88 Valid, 146 Invalid, 822 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [125 Valid, 697 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-13 10:28:10,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2024-09-13 10:28:10,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 121. [2024-09-13 10:28:10,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 84 states have (on average 1.0476190476190477) internal successors, (88), 83 states have internal predecessors, (88), 23 states have call successors, (23), 16 states have call predecessors, (23), 13 states have return successors, (23), 21 states have call predecessors, (23), 23 states have call successors, (23) [2024-09-13 10:28:10,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 134 transitions. [2024-09-13 10:28:10,108 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 134 transitions. Word has length 432 [2024-09-13 10:28:10,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 10:28:10,110 INFO L474 AbstractCegarLoop]: Abstraction has 121 states and 134 transitions. [2024-09-13 10:28:10,110 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 42 states have (on average 2.738095238095238) internal successors, (115), 43 states have internal predecessors, (115), 35 states have call successors, (41), 1 states have call predecessors, (41), 16 states have return successors, (60), 29 states have call predecessors, (60), 35 states have call successors, (60) [2024-09-13 10:28:10,111 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 134 transitions. [2024-09-13 10:28:10,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 283 [2024-09-13 10:28:10,114 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 10:28:10,114 INFO L216 NwaCegarLoop]: trace histogram [41, 41, 33, 20, 20, 20, 20, 20, 20, 20, 13, 8, 1, 1, 1, 1, 1, 1] [2024-09-13 10:28:10,132 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-09-13 10:28:10,318 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-09-13 10:28:10,319 INFO L399 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, fiboErr0ENSURES_VIOLATIONPOST_CONDITION] === [2024-09-13 10:28:10,319 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 10:28:10,319 INFO L85 PathProgramCache]: Analyzing trace with hash 1757555425, now seen corresponding path program 6 times [2024-09-13 10:28:10,319 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 10:28:10,320 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1021602521] [2024-09-13 10:28:10,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 10:28:10,320 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 10:28:10,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:28:11,807 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-09-13 10:28:11,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:28:12,620 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-13 10:28:12,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:28:12,977 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-13 10:28:12,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:28:13,148 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-13 10:28:13,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:28:13,261 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-13 10:28:13,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:28:13,342 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-13 10:28:13,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:28:13,400 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-13 10:28:13,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:28:13,408 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-13 10:28:13,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:28:13,434 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-09-13 10:28:13,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:28:13,442 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2024-09-13 10:28:13,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:28:13,462 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-13 10:28:13,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:28:13,470 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-13 10:28:13,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:28:13,479 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2024-09-13 10:28:13,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:28:13,507 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-13 10:28:13,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:28:13,525 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-13 10:28:13,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:28:13,533 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-13 10:28:13,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:28:13,543 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-09-13 10:28:13,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:28:13,561 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2024-09-13 10:28:13,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:28:13,667 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-13 10:28:13,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:28:13,693 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-13 10:28:13,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:28:13,711 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-13 10:28:13,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:28:13,718 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-13 10:28:13,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:28:13,725 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-09-13 10:28:13,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:28:13,732 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2024-09-13 10:28:13,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:28:13,753 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-13 10:28:13,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:28:13,759 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-13 10:28:13,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:28:13,765 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 173 [2024-09-13 10:28:13,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:28:13,898 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-13 10:28:13,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:28:13,960 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-13 10:28:13,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:28:13,985 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-13 10:28:13,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:28:14,000 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-13 10:28:14,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:28:14,006 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-13 10:28:14,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:28:14,013 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-09-13 10:28:14,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:28:14,020 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2024-09-13 10:28:14,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:28:14,037 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-13 10:28:14,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:28:14,044 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-13 10:28:14,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:28:14,051 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2024-09-13 10:28:14,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:28:14,077 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-13 10:28:14,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:28:14,093 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-13 10:28:14,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:28:14,098 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-13 10:28:14,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:28:14,105 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-09-13 10:28:14,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:28:14,122 INFO L134 CoverageAnalysis]: Checked inductivity of 4568 backedges. 0 proven. 1500 refuted. 0 times theorem prover too weak. 3068 trivial. 0 not checked. [2024-09-13 10:28:14,123 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 10:28:14,123 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1021602521] [2024-09-13 10:28:14,123 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1021602521] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 10:28:14,123 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1717883575] [2024-09-13 10:28:14,123 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-13 10:28:14,124 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 10:28:14,124 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 10:28:14,125 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 10:28:14,127 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 10:28:14,340 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 41 check-sat command(s) [2024-09-13 10:28:14,341 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 10:28:14,350 INFO L262 TraceCheckSpWp]: Trace formula consists of 647 conjuncts, 167 conjuncts are in the unsatisfiable core [2024-09-13 10:28:14,356 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 10:28:14,660 INFO L134 CoverageAnalysis]: Checked inductivity of 4568 backedges. 0 proven. 1500 refuted. 0 times theorem prover too weak. 3068 trivial. 0 not checked. [2024-09-13 10:28:14,660 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 10:28:15,990 INFO L134 CoverageAnalysis]: Checked inductivity of 4568 backedges. 0 proven. 1500 refuted. 0 times theorem prover too weak. 3068 trivial. 0 not checked. [2024-09-13 10:28:15,990 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1717883575] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 10:28:15,990 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-13 10:28:15,990 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 22] total 28 [2024-09-13 10:28:15,990 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1298716199] [2024-09-13 10:28:15,990 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-13 10:28:15,991 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-09-13 10:28:15,991 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 10:28:15,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-09-13 10:28:15,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=691, Unknown=0, NotChecked=0, Total=756 [2024-09-13 10:28:15,992 INFO L87 Difference]: Start difference. First operand 121 states and 134 transitions. Second operand has 28 states, 28 states have (on average 1.1785714285714286) internal successors, (33), 15 states have internal predecessors, (33), 6 states have call successors, (7), 1 states have call predecessors, (7), 7 states have return successors, (18), 18 states have call predecessors, (18), 6 states have call successors, (18) [2024-09-13 10:28:16,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 10:28:16,204 INFO L93 Difference]: Finished difference Result 119 states and 132 transitions. [2024-09-13 10:28:16,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-09-13 10:28:16,205 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.1785714285714286) internal successors, (33), 15 states have internal predecessors, (33), 6 states have call successors, (7), 1 states have call predecessors, (7), 7 states have return successors, (18), 18 states have call predecessors, (18), 6 states have call successors, (18) Word has length 282 [2024-09-13 10:28:16,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 10:28:16,205 INFO L225 Difference]: With dead ends: 119 [2024-09-13 10:28:16,205 INFO L226 Difference]: Without dead ends: 0 [2024-09-13 10:28:16,206 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 729 GetRequests, 703 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=65, Invalid=691, Unknown=0, NotChecked=0, Total=756 [2024-09-13 10:28:16,206 INFO L434 NwaCegarLoop]: 24 mSDtfsCounter, 0 mSDsluCounter, 344 mSDsCounter, 0 mSdLazyCounter, 522 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 368 SdHoareTripleChecker+Invalid, 522 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 522 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-13 10:28:16,206 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 368 Invalid, 522 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 522 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-13 10:28:16,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2024-09-13 10:28:16,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2024-09-13 10:28:16,207 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 10:28:16,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2024-09-13 10:28:16,207 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 282 [2024-09-13 10:28:16,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 10:28:16,207 INFO L474 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2024-09-13 10:28:16,207 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.1785714285714286) internal successors, (33), 15 states have internal predecessors, (33), 6 states have call successors, (7), 1 states have call predecessors, (7), 7 states have return successors, (18), 18 states have call predecessors, (18), 6 states have call successors, (18) [2024-09-13 10:28:16,207 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2024-09-13 10:28:16,208 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2024-09-13 10:28:16,213 INFO L785 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 2 remaining) [2024-09-13 10:28:16,213 INFO L785 garLoopResultBuilder]: Registering result SAFE for location fiboErr0ENSURES_VIOLATIONPOST_CONDITION (0 of 2 remaining) [2024-09-13 10:28:16,231 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 10:28:16,417 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 10:28:16,420 INFO L408 BasicCegarLoop]: Path program histogram: [6, 1, 1, 1, 1, 1] [2024-09-13 10:28:16,422 INFO L165 ceAbstractionStarter]: Computing trace abstraction results [2024-09-13 10:28:16,424 INFO L201 PluginConnector]: Adding new model witness-2.1.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 13.09 10:28:16 BoogieIcfgContainer [2024-09-13 10:28:16,424 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2024-09-13 10:28:16,424 INFO L158 Benchmark]: Toolchain (without parser) took 22426.36ms. Allocated memory was 169.9MB in the beginning and 434.1MB in the end (delta: 264.2MB). Free memory was 135.0MB in the beginning and 360.2MB in the end (delta: -225.1MB). Peak memory consumption was 41.0MB. Max. memory is 16.1GB. [2024-09-13 10:28:16,424 INFO L158 Benchmark]: CDTParser took 0.15ms. Allocated memory is still 169.9MB. Free memory was 136.0MB in the beginning and 135.7MB in the end (delta: 276.9kB). There was no memory consumed. Max. memory is 16.1GB. [2024-09-13 10:28:16,424 INFO L158 Benchmark]: Witness Parser took 0.16ms. Allocated memory is still 169.9MB. Free memory is still 136.7MB. There was no memory consumed. Max. memory is 16.1GB. [2024-09-13 10:28:16,425 INFO L158 Benchmark]: CACSL2BoogieTranslator took 255.00ms. Allocated memory is still 169.9MB. Free memory was 134.4MB in the beginning and 121.8MB in the end (delta: 12.6MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2024-09-13 10:28:16,425 INFO L158 Benchmark]: Boogie Procedure Inliner took 28.55ms. Allocated memory is still 169.9MB. Free memory was 121.8MB in the beginning and 120.4MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-09-13 10:28:16,425 INFO L158 Benchmark]: Boogie Preprocessor took 36.07ms. Allocated memory is still 169.9MB. Free memory was 120.4MB in the beginning and 118.9MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-09-13 10:28:16,425 INFO L158 Benchmark]: RCFGBuilder took 315.17ms. Allocated memory is still 169.9MB. Free memory was 118.9MB in the beginning and 108.5MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2024-09-13 10:28:16,426 INFO L158 Benchmark]: TraceAbstraction took 21785.98ms. Allocated memory was 169.9MB in the beginning and 434.1MB in the end (delta: 264.2MB). Free memory was 107.8MB in the beginning and 360.2MB in the end (delta: -252.4MB). Peak memory consumption was 13.7MB. Max. memory is 16.1GB. [2024-09-13 10:28:16,427 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.15ms. Allocated memory is still 169.9MB. Free memory was 136.0MB in the beginning and 135.7MB in the end (delta: 276.9kB). There was no memory consumed. Max. memory is 16.1GB. * Witness Parser took 0.16ms. Allocated memory is still 169.9MB. Free memory is still 136.7MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 255.00ms. Allocated memory is still 169.9MB. Free memory was 134.4MB in the beginning and 121.8MB in the end (delta: 12.6MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 28.55ms. Allocated memory is still 169.9MB. Free memory was 121.8MB in the beginning and 120.4MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 36.07ms. Allocated memory is still 169.9MB. Free memory was 120.4MB in the beginning and 118.9MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 315.17ms. Allocated memory is still 169.9MB. Free memory was 118.9MB in the beginning and 108.5MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * TraceAbstraction took 21785.98ms. Allocated memory was 169.9MB in the beginning and 434.1MB in the end (delta: 264.2MB). Free memory was 107.8MB in the beginning and 360.2MB in the end (delta: -252.4MB). Peak memory consumption was 13.7MB. 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: 21.7s, OverallIterations: 11, TraceHistogramMax: 63, PathProgramHistogramMax: 6, EmptinessCheckTime: 0.0s, AutomataDifference: 2.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 402 SdHoareTripleChecker+Valid, 1.5s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 362 mSDsluCounter, 907 SdHoareTripleChecker+Invalid, 1.2s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 734 mSDsCounter, 399 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 2138 IncrementalHoareTripleChecker+Invalid, 2537 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 399 mSolverCounterUnsat, 173 mSDtfsCounter, 2138 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 2763 GetRequests, 2530 SyntacticMatches, 29 SemanticMatches, 204 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2390 ImplicationChecksByTransitivity, 2.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=331occurred in iteration=9, InterpolantAutomatonStates: 146, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 11 MinimizatonAttempts, 116 StatesRemovedByMinimization, 10 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.6s SatisfiabilityAnalysisTime, 16.5s InterpolantComputationTime, 2271 NumberOfCodeBlocks, 2175 NumberOfCodeBlocksAsserted, 114 NumberOfCheckSat, 3361 ConstructedInterpolants, 0 QuantifiedInterpolants, 6217 SizeOfPredicates, 24 NumberOfNonLiveVariables, 2389 ConjunctsInSsa, 238 ConjunctsInUnsatCore, 25 InterpolantComputations, 4 PerfectInterpolantSequences, 40760/54113 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 10:28:16,456 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