./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/recursive-simple/fibo_5-1.c --full-output --witness-type correctness_witness --validate ../results/automizer-verification-files/SV-COMP24_unreach-call/fibo_5-1.yml/witness-2.1.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 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_5-1.c ../results/automizer-verification-files/SV-COMP24_unreach-call/fibo_5-1.yml/witness-2.1.yml -s /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.positions.where.we.compute.the.hoare.annotation None --- Real Ultimate output --- This is Ultimate 0.2.4-dev-1d5fa63-m [2024-09-13 10:27:51,521 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-09-13 10:27:51,595 INFO L114 SettingsManager]: Loading settings from /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-09-13 10:27:51,601 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-09-13 10:27:51,601 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-09-13 10:27:51,641 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-09-13 10:27:51,642 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-09-13 10:27:51,643 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-09-13 10:27:51,643 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-09-13 10:27:51,645 INFO L153 SettingsManager]: * Use memory slicer=true [2024-09-13 10:27:51,645 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-09-13 10:27:51,657 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-09-13 10:27:51,657 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-09-13 10:27:51,658 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-09-13 10:27:51,661 INFO L153 SettingsManager]: * Use SBE=true [2024-09-13 10:27:51,661 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-09-13 10:27:51,661 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-09-13 10:27:51,662 INFO L153 SettingsManager]: * sizeof long=4 [2024-09-13 10:27:51,662 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-09-13 10:27:51,662 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-09-13 10:27:51,662 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-09-13 10:27:51,663 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-09-13 10:27:51,663 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-09-13 10:27:51,663 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-09-13 10:27:51,663 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-09-13 10:27:51,664 INFO L153 SettingsManager]: * sizeof long double=12 [2024-09-13 10:27:51,664 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-09-13 10:27:51,664 INFO L153 SettingsManager]: * Use constant arrays=true [2024-09-13 10:27:51,664 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-09-13 10:27:51,665 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-09-13 10:27:51,665 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-09-13 10:27:51,665 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-09-13 10:27:51,665 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-13 10:27:51,665 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-09-13 10:27:51,666 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-09-13 10:27:51,666 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-09-13 10:27:51,666 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-09-13 10:27:51,666 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-09-13 10:27:51,666 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-09-13 10:27:51,667 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-09-13 10:27:51,667 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-09-13 10:27:51,668 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-09-13 10:27:51,668 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Positions where we compute the Hoare Annotation -> None [2024-09-13 10:27:51,900 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-09-13 10:27:51,925 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-09-13 10:27:51,928 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-09-13 10:27:51,929 INFO L270 PluginConnector]: Initializing CDTParser... [2024-09-13 10:27:51,929 INFO L274 PluginConnector]: CDTParser initialized [2024-09-13 10:27:51,930 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/certificate-witnesses-artifact/automizer/../sv-benchmarks/c/recursive-simple/fibo_5-1.c [2024-09-13 10:27:53,351 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-09-13 10:27:53,500 INFO L384 CDTParser]: Found 1 translation units. [2024-09-13 10:27:53,500 INFO L180 CDTParser]: Scanning /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/recursive-simple/fibo_5-1.c [2024-09-13 10:27:53,506 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/certificate-witnesses-artifact/automizer/data/13cd0d769/bec237d3c3bc46ab867616c8512f754a/FLAG1d26e4733 [2024-09-13 10:27:53,521 INFO L435 CDTParser]: Successfully deleted /storage/repos/certificate-witnesses-artifact/automizer/data/13cd0d769/bec237d3c3bc46ab867616c8512f754a [2024-09-13 10:27:53,524 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-09-13 10:27:53,525 INFO L274 PluginConnector]: Witness Parser initialized [2024-09-13 10:27:53,526 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/certificate-witnesses-artifact/automizer/../results/automizer-verification-files/SV-COMP24_unreach-call/fibo_5-1.yml/witness-2.1.yml [2024-09-13 10:27:53,566 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-09-13 10:27:53,567 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-09-13 10:27:53,567 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-09-13 10:27:53,568 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-09-13 10:27:53,571 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-09-13 10:27:53,572 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.09 10:27:53" (1/2) ... [2024-09-13 10:27:53,573 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7a2a36f3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 10:27:53, skipping insertion in model container [2024-09-13 10:27:53,573 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.09 10:27:53" (1/2) ... [2024-09-13 10:27:53,574 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@4671f441 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 10:27:53, skipping insertion in model container [2024-09-13 10:27:53,574 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 10:27:53,575 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7a2a36f3 and model type witness-2.1.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 13.09 10:27:53, skipping insertion in model container [2024-09-13 10:27:53,575 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 10:27:53,579 INFO L93 nessWitnessExtractor]: Found the following entries in the witness: [2024-09-13 10:27:53,579 INFO L1541 ArrayList]: Function contract at [L7]: requires null, ensures (((((((((\result == 3) && (4 == \old(n))) || ((2 == \old(n)) && (\result == 1))) || (\old(n) < 1)) || ((3 == \old(n)) && (\result == 2))) || (5 < \old(n))) || ((\result == 1) && (1 == \old(n)))) || ((\result == 5) && (5 == \old(n)))) && ((0 < \old(n)) || (\result == 0))) [2024-09-13 10:27:53,599 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-09-13 10:27:53,747 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/recursive-simple/fibo_5-1.c[740,753] [2024-09-13 10:27:53,754 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-13 10:27:53,767 INFO L200 MainTranslator]: Completed pre-run Start Parsing Global [2024-09-13 10:27:53,803 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/recursive-simple/fibo_5-1.c[740,753] [2024-09-13 10:27:53,804 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-13 10:27:53,817 INFO L204 MainTranslator]: Completed translation [2024-09-13 10:27:53,817 INFO L201 PluginConnector]: Adding new model witness-2.1.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 13.09 10:27:53 WrapperNode [2024-09-13 10:27:53,817 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-09-13 10:27:53,818 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-09-13 10:27:53,819 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-09-13 10:27:53,819 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-09-13 10:27:53,825 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 10:27:53" (1/1) ... [2024-09-13 10:27:53,830 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 10:27:53" (1/1) ... [2024-09-13 10:27:53,842 INFO L138 Inliner]: procedures = 13, calls = 10, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 20 [2024-09-13 10:27:53,843 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-09-13 10:27:53,844 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-09-13 10:27:53,844 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-09-13 10:27:53,844 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-09-13 10:27:53,852 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 10:27:53" (1/1) ... [2024-09-13 10:27:53,852 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 10:27:53" (1/1) ... [2024-09-13 10:27:53,853 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 10:27:53" (1/1) ... [2024-09-13 10:27:53,859 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 10:27:53,859 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 10:27:53" (1/1) ... [2024-09-13 10:27:53,859 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 10:27:53" (1/1) ... [2024-09-13 10:27:53,862 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 10:27:53" (1/1) ... [2024-09-13 10:27:53,863 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 10:27:53" (1/1) ... [2024-09-13 10:27:53,863 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 10:27:53" (1/1) ... [2024-09-13 10:27:53,864 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 10:27:53" (1/1) ... [2024-09-13 10:27:53,866 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-09-13 10:27:53,866 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-09-13 10:27:53,867 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-09-13 10:27:53,867 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-09-13 10:27:53,867 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 10:27:53" (1/1) ... [2024-09-13 10:27:53,871 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-13 10:27:53,878 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 10:27:53,890 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 10:27:53,891 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 10:27:53,923 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-09-13 10:27:53,923 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-09-13 10:27:53,923 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-09-13 10:27:53,923 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2024-09-13 10:27:53,924 INFO L130 BoogieDeclarations]: Found specification of procedure fibo [2024-09-13 10:27:53,924 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo [2024-09-13 10:27:53,971 INFO L242 CfgBuilder]: Building ICFG [2024-09-13 10:27:53,973 INFO L268 CfgBuilder]: Building CFG for each procedure with an implementation [2024-09-13 10:27:54,116 INFO L? ?]: Removed 9 outVars from TransFormulas that were not future-live. [2024-09-13 10:27:54,117 INFO L291 CfgBuilder]: Performing block encoding [2024-09-13 10:27:54,139 INFO L313 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-09-13 10:27:54,140 INFO L318 CfgBuilder]: Removed 0 assume(true) statements. [2024-09-13 10:27:54,140 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 10:27:54,140 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-09-13 10:27:54,142 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-09-13 10:27:54,143 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-09-13 10:27:54,151 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-09-13 10:27:54,151 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.09 10:27:53" (1/4) ... [2024-09-13 10:27:54,152 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6a06be5a 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 10:27:54,152 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 10:27:54,152 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6a06be5a 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 10:27:54,152 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 10:27:53" (3/4) ... [2024-09-13 10:27:54,153 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6a06be5a 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 10:27:54,153 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 10:27:54,154 INFO L112 eAbstractionObserver]: Analyzing ICFG fibo_5-1.c [2024-09-13 10:27:54,172 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-09-13 10:27:54,173 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2024-09-13 10:27:54,226 INFO L335 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-09-13 10:27:54,235 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;@76110284, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-09-13 10:27:54,236 INFO L337 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2024-09-13 10:27:54,240 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 10:27:54,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2024-09-13 10:27:54,248 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 10:27:54,248 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2024-09-13 10:27:54,249 INFO L399 AbstractCegarLoop]: === Iteration 1 === Targeting fiboErr0ENSURES_VIOLATIONPOST_CONDITION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, fiboErr0ENSURES_VIOLATIONPOST_CONDITION] === [2024-09-13 10:27:54,256 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 10:27:54,256 INFO L85 PathProgramCache]: Analyzing trace with hash 65647554, now seen corresponding path program 1 times [2024-09-13 10:27:54,265 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 10:27:54,266 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [911047532] [2024-09-13 10:27:54,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 10:27:54,267 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 10:27:54,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:27:54,563 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 10:27:54,564 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 10:27:54,564 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [911047532] [2024-09-13 10:27:54,565 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [911047532] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-13 10:27:54,566 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-13 10:27:54,566 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-09-13 10:27:54,569 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1933588637] [2024-09-13 10:27:54,570 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-13 10:27:54,576 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-09-13 10:27:54,576 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 10:27:54,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-09-13 10:27:54,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-09-13 10:27:54,611 INFO L87 Difference]: Start difference. First operand has 18 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 13 states have internal predecessors, (16), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 4 states have internal predecessors, (4), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-13 10:27:54,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 10:27:54,722 INFO L93 Difference]: Finished difference Result 23 states and 30 transitions. [2024-09-13 10:27:54,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-09-13 10:27:54,725 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 4 states have internal predecessors, (4), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2024-09-13 10:27:54,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 10:27:54,732 INFO L225 Difference]: With dead ends: 23 [2024-09-13 10:27:54,733 INFO L226 Difference]: Without dead ends: 21 [2024-09-13 10:27:54,735 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-09-13 10:27:54,739 INFO L434 NwaCegarLoop]: 11 mSDtfsCounter, 7 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-13 10:27:54,740 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 20 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-13 10:27:54,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2024-09-13 10:27:54,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 17. [2024-09-13 10:27:54,781 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 10:27:54,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 20 transitions. [2024-09-13 10:27:54,784 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 20 transitions. Word has length 5 [2024-09-13 10:27:54,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 10:27:54,785 INFO L474 AbstractCegarLoop]: Abstraction has 17 states and 20 transitions. [2024-09-13 10:27:54,785 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 4 states have internal predecessors, (4), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-13 10:27:54,785 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 20 transitions. [2024-09-13 10:27:54,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2024-09-13 10:27:54,787 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 10:27:54,787 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2024-09-13 10:27:54,788 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-09-13 10:27:54,788 INFO L399 AbstractCegarLoop]: === Iteration 2 === Targeting fiboErr0ENSURES_VIOLATIONPOST_CONDITION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, fiboErr0ENSURES_VIOLATIONPOST_CONDITION] === [2024-09-13 10:27:54,790 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 10:27:54,790 INFO L85 PathProgramCache]: Analyzing trace with hash 2035074950, now seen corresponding path program 1 times [2024-09-13 10:27:54,792 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 10:27:54,792 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1376046749] [2024-09-13 10:27:54,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 10:27:54,793 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 10:27:54,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:27:54,911 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 10:27:54,911 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 10:27:54,911 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1376046749] [2024-09-13 10:27:54,912 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1376046749] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-13 10:27:54,912 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-13 10:27:54,912 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-09-13 10:27:54,912 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1483269858] [2024-09-13 10:27:54,912 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-13 10:27:54,914 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-13 10:27:54,914 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 10:27:54,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-13 10:27:54,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-13 10:27:54,915 INFO L87 Difference]: Start difference. First operand 17 states and 20 transitions. Second operand has 5 states, 4 states have (on average 1.25) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-13 10:27:54,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 10:27:54,982 INFO L93 Difference]: Finished difference Result 27 states and 31 transitions. [2024-09-13 10:27:54,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-13 10:27:54,983 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.25) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2024-09-13 10:27:54,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 10:27:54,985 INFO L225 Difference]: With dead ends: 27 [2024-09-13 10:27:54,985 INFO L226 Difference]: Without dead ends: 27 [2024-09-13 10:27:54,986 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-09-13 10:27:54,988 INFO L434 NwaCegarLoop]: 14 mSDtfsCounter, 15 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-13 10:27:54,989 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 44 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-13 10:27:54,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2024-09-13 10:27:54,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 26. [2024-09-13 10:27:54,995 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 10:27:54,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 31 transitions. [2024-09-13 10:27:54,998 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 31 transitions. Word has length 6 [2024-09-13 10:27:54,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 10:27:54,998 INFO L474 AbstractCegarLoop]: Abstraction has 26 states and 31 transitions. [2024-09-13 10:27:54,998 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.25) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-13 10:27:54,999 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 31 transitions. [2024-09-13 10:27:54,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2024-09-13 10:27:55,000 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 10:27:55,000 INFO L216 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1] [2024-09-13 10:27:55,000 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-09-13 10:27:55,001 INFO L399 AbstractCegarLoop]: === Iteration 3 === Targeting fiboErr0ENSURES_VIOLATIONPOST_CONDITION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, fiboErr0ENSURES_VIOLATIONPOST_CONDITION] === [2024-09-13 10:27:55,001 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 10:27:55,002 INFO L85 PathProgramCache]: Analyzing trace with hash -254199789, now seen corresponding path program 1 times [2024-09-13 10:27:55,003 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 10:27:55,003 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [706972873] [2024-09-13 10:27:55,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 10:27:55,004 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 10:27:55,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:27:55,109 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 10:27:55,109 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 10:27:55,109 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [706972873] [2024-09-13 10:27:55,109 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [706972873] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 10:27:55,110 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [317296594] [2024-09-13 10:27:55,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 10:27:55,110 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 10:27:55,110 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 10:27:55,112 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 10:27:55,114 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 10:27:55,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:27:55,170 INFO L262 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-09-13 10:27:55,174 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 10:27:55,230 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 10:27:55,230 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 10:27:55,310 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 10:27:55,311 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [317296594] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 10:27:55,311 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-13 10:27:55,311 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 11 [2024-09-13 10:27:55,315 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [316155423] [2024-09-13 10:27:55,315 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-13 10:27:55,316 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-09-13 10:27:55,316 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 10:27:55,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-09-13 10:27:55,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2024-09-13 10:27:55,317 INFO L87 Difference]: Start difference. First operand 26 states and 31 transitions. Second operand has 12 states, 10 states have (on average 1.5) internal successors, (15), 7 states have internal predecessors, (15), 4 states have call successors, (4), 4 states have call predecessors, (4), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-13 10:27:55,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 10:27:55,530 INFO L93 Difference]: Finished difference Result 57 states and 64 transitions. [2024-09-13 10:27:55,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-09-13 10:27:55,531 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 1.5) internal successors, (15), 7 states have internal predecessors, (15), 4 states have call successors, (4), 4 states have call predecessors, (4), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2024-09-13 10:27:55,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 10:27:55,532 INFO L225 Difference]: With dead ends: 57 [2024-09-13 10:27:55,533 INFO L226 Difference]: Without dead ends: 57 [2024-09-13 10:27:55,533 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2024-09-13 10:27:55,535 INFO L434 NwaCegarLoop]: 24 mSDtfsCounter, 58 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 121 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 144 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-13 10:27:55,535 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [59 Valid, 82 Invalid, 144 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 121 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-13 10:27:55,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2024-09-13 10:27:55,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 53. [2024-09-13 10:27:55,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 35 states have (on average 1.2) internal successors, (42), 36 states have internal predecessors, (42), 11 states have call successors, (11), 5 states have call predecessors, (11), 5 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2024-09-13 10:27:55,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 64 transitions. [2024-09-13 10:27:55,544 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 64 transitions. Word has length 10 [2024-09-13 10:27:55,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 10:27:55,544 INFO L474 AbstractCegarLoop]: Abstraction has 53 states and 64 transitions. [2024-09-13 10:27:55,544 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 1.5) internal successors, (15), 7 states have internal predecessors, (15), 4 states have call successors, (4), 4 states have call predecessors, (4), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-13 10:27:55,544 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 64 transitions. [2024-09-13 10:27:55,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2024-09-13 10:27:55,545 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 10:27:55,545 INFO L216 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1] [2024-09-13 10:27:55,563 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 10:27:55,749 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 10:27:55,750 INFO L399 AbstractCegarLoop]: === Iteration 4 === Targeting fiboErr0ENSURES_VIOLATIONPOST_CONDITION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, fiboErr0ENSURES_VIOLATIONPOST_CONDITION] === [2024-09-13 10:27:55,750 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 10:27:55,750 INFO L85 PathProgramCache]: Analyzing trace with hash -254987590, now seen corresponding path program 2 times [2024-09-13 10:27:55,751 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 10:27:55,751 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [327108060] [2024-09-13 10:27:55,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 10:27:55,751 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 10:27:55,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:27:56,100 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 28 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-13 10:27:56,100 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 10:27:56,100 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [327108060] [2024-09-13 10:27:56,101 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [327108060] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 10:27:56,101 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [368169360] [2024-09-13 10:27:56,101 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-13 10:27:56,101 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 10:27:56,101 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 10:27:56,103 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 10:27:56,105 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 10:27:56,145 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-09-13 10:27:56,145 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 10:27:56,146 INFO L262 TraceCheckSpWp]: Trace formula consists of 35 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-09-13 10:27:56,147 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 10:27:56,193 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2024-09-13 10:27:56,193 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-13 10:27:56,193 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [368169360] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-13 10:27:56,194 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-09-13 10:27:56,194 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [13] total 16 [2024-09-13 10:27:56,194 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [303249558] [2024-09-13 10:27:56,194 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-13 10:27:56,194 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-13 10:27:56,194 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 10:27:56,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-13 10:27:56,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2024-09-13 10:27:56,195 INFO L87 Difference]: Start difference. First operand 53 states and 64 transitions. Second operand has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-13 10:27:56,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 10:27:56,239 INFO L93 Difference]: Finished difference Result 56 states and 75 transitions. [2024-09-13 10:27:56,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-13 10:27:56,240 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2024-09-13 10:27:56,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 10:27:56,241 INFO L225 Difference]: With dead ends: 56 [2024-09-13 10:27:56,242 INFO L226 Difference]: Without dead ends: 56 [2024-09-13 10:27:56,242 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2024-09-13 10:27:56,243 INFO L434 NwaCegarLoop]: 12 mSDtfsCounter, 11 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-13 10:27:56,243 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 19 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-13 10:27:56,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2024-09-13 10:27:56,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 53. [2024-09-13 10:27:56,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 35 states have (on average 1.2) internal successors, (42), 36 states have internal predecessors, (42), 11 states have call successors, (11), 5 states have call predecessors, (11), 5 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2024-09-13 10:27:56,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 64 transitions. [2024-09-13 10:27:56,259 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 64 transitions. Word has length 22 [2024-09-13 10:27:56,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 10:27:56,259 INFO L474 AbstractCegarLoop]: Abstraction has 53 states and 64 transitions. [2024-09-13 10:27:56,259 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-13 10:27:56,260 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 64 transitions. [2024-09-13 10:27:56,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2024-09-13 10:27:56,261 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 10:27:56,261 INFO L216 NwaCegarLoop]: trace histogram [6, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 10:27:56,276 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 10:27:56,464 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 10:27:56,465 INFO L399 AbstractCegarLoop]: === Iteration 5 === Targeting fiboErr0ENSURES_VIOLATIONPOST_CONDITION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, fiboErr0ENSURES_VIOLATIONPOST_CONDITION] === [2024-09-13 10:27:56,465 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 10:27:56,465 INFO L85 PathProgramCache]: Analyzing trace with hash -2098277332, now seen corresponding path program 1 times [2024-09-13 10:27:56,465 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 10:27:56,466 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1577681447] [2024-09-13 10:27:56,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 10:27:56,466 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 10:27:56,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:27:56,556 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2024-09-13 10:27:56,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:27:56,580 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-09-13 10:27:56,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:27:56,585 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 12 proven. 3 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-09-13 10:27:56,586 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 10:27:56,586 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1577681447] [2024-09-13 10:27:56,586 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1577681447] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 10:27:56,586 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [844861252] [2024-09-13 10:27:56,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 10:27:56,587 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 10:27:56,587 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 10:27:56,588 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 10:27:56,590 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 10:27:56,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:27:56,640 INFO L262 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-09-13 10:27:56,642 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 10:27:56,796 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 13 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-09-13 10:27:56,798 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 10:27:56,988 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 2 proven. 43 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-09-13 10:27:56,988 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [844861252] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 10:27:56,988 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-13 10:27:56,989 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 13, 13] total 16 [2024-09-13 10:27:56,989 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1661040050] [2024-09-13 10:27:56,989 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-13 10:27:56,990 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-09-13 10:27:56,990 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 10:27:56,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-09-13 10:27:56,991 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2024-09-13 10:27:56,991 INFO L87 Difference]: Start difference. First operand 53 states and 64 transitions. Second operand has 16 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 12 states have internal predecessors, (34), 7 states have call successors, (9), 6 states have call predecessors, (9), 3 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-13 10:27:57,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 10:27:57,242 INFO L93 Difference]: Finished difference Result 115 states and 196 transitions. [2024-09-13 10:27:57,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-09-13 10:27:57,243 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 12 states have internal predecessors, (34), 7 states have call successors, (9), 6 states have call predecessors, (9), 3 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 30 [2024-09-13 10:27:57,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 10:27:57,245 INFO L225 Difference]: With dead ends: 115 [2024-09-13 10:27:57,245 INFO L226 Difference]: Without dead ends: 115 [2024-09-13 10:27:57,245 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 48 SyntacticMatches, 10 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=114, Invalid=306, Unknown=0, NotChecked=0, Total=420 [2024-09-13 10:27:57,246 INFO L434 NwaCegarLoop]: 19 mSDtfsCounter, 81 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 218 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 269 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 218 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-13 10:27:57,247 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [82 Valid, 81 Invalid, 269 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 218 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-13 10:27:57,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2024-09-13 10:27:57,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 100. [2024-09-13 10:27:57,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 64 states have (on average 1.1875) internal successors, (76), 66 states have internal predecessors, (76), 22 states have call successors, (22), 8 states have call predecessors, (22), 12 states have return successors, (65), 25 states have call predecessors, (65), 22 states have call successors, (65) [2024-09-13 10:27:57,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 163 transitions. [2024-09-13 10:27:57,279 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 163 transitions. Word has length 30 [2024-09-13 10:27:57,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 10:27:57,279 INFO L474 AbstractCegarLoop]: Abstraction has 100 states and 163 transitions. [2024-09-13 10:27:57,280 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 12 states have internal predecessors, (34), 7 states have call successors, (9), 6 states have call predecessors, (9), 3 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-13 10:27:57,280 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 163 transitions. [2024-09-13 10:27:57,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2024-09-13 10:27:57,281 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 10:27:57,281 INFO L216 NwaCegarLoop]: trace histogram [6, 5, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 10:27:57,297 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-09-13 10:27:57,481 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 10:27:57,482 INFO L399 AbstractCegarLoop]: === Iteration 6 === Targeting fiboErr0ENSURES_VIOLATIONPOST_CONDITION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, fiboErr0ENSURES_VIOLATIONPOST_CONDITION] === [2024-09-13 10:27:57,482 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 10:27:57,482 INFO L85 PathProgramCache]: Analyzing trace with hash -2106411776, now seen corresponding path program 1 times [2024-09-13 10:27:57,482 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 10:27:57,482 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1001860169] [2024-09-13 10:27:57,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 10:27:57,483 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 10:27:57,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:27:57,767 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2024-09-13 10:27:57,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:27:57,797 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2024-09-13 10:27:57,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:27:57,829 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 1 proven. 47 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-09-13 10:27:57,830 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 10:27:57,830 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1001860169] [2024-09-13 10:27:57,830 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1001860169] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 10:27:57,831 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [843260569] [2024-09-13 10:27:57,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 10:27:57,831 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 10:27:57,831 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 10:27:57,834 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 10:27:57,836 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 10:27:57,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:27:57,881 INFO L262 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 27 conjuncts are in the unsatisfiable core [2024-09-13 10:27:57,883 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 10:27:57,954 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 1 proven. 47 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-09-13 10:27:57,955 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 10:27:58,767 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-09-13 10:27:58,768 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [843260569] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 10:27:58,768 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-13 10:27:58,768 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 25 [2024-09-13 10:27:58,768 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [983564758] [2024-09-13 10:27:58,768 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-13 10:27:58,769 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-09-13 10:27:58,769 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 10:27:58,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-09-13 10:27:58,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=573, Unknown=0, NotChecked=0, Total=650 [2024-09-13 10:27:58,770 INFO L87 Difference]: Start difference. First operand 100 states and 163 transitions. Second operand has 26 states, 23 states have (on average 1.6521739130434783) internal successors, (38), 18 states have internal predecessors, (38), 12 states have call successors, (12), 9 states have call predecessors, (12), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-09-13 10:28:00,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 10:28:00,449 INFO L93 Difference]: Finished difference Result 159 states and 266 transitions. [2024-09-13 10:28:00,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2024-09-13 10:28:00,450 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 23 states have (on average 1.6521739130434783) internal successors, (38), 18 states have internal predecessors, (38), 12 states have call successors, (12), 9 states have call predecessors, (12), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 31 [2024-09-13 10:28:00,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 10:28:00,452 INFO L225 Difference]: With dead ends: 159 [2024-09-13 10:28:00,452 INFO L226 Difference]: Without dead ends: 157 [2024-09-13 10:28:00,456 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 640 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=360, Invalid=2832, Unknown=0, NotChecked=0, Total=3192 [2024-09-13 10:28:00,457 INFO L434 NwaCegarLoop]: 20 mSDtfsCounter, 125 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 928 mSolverCounterSat, 101 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 147 SdHoareTripleChecker+Invalid, 1029 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 101 IncrementalHoareTripleChecker+Valid, 928 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-09-13 10:28:00,457 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [138 Valid, 147 Invalid, 1029 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [101 Valid, 928 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-09-13 10:28:00,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2024-09-13 10:28:00,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 138. [2024-09-13 10:28:00,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 91 states have (on average 1.1978021978021978) internal successors, (109), 90 states have internal predecessors, (109), 28 states have call successors, (28), 11 states have call predecessors, (28), 17 states have return successors, (103), 36 states have call predecessors, (103), 28 states have call successors, (103) [2024-09-13 10:28:00,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 240 transitions. [2024-09-13 10:28:00,481 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 240 transitions. Word has length 31 [2024-09-13 10:28:00,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 10:28:00,481 INFO L474 AbstractCegarLoop]: Abstraction has 138 states and 240 transitions. [2024-09-13 10:28:00,482 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 23 states have (on average 1.6521739130434783) internal successors, (38), 18 states have internal predecessors, (38), 12 states have call successors, (12), 9 states have call predecessors, (12), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-09-13 10:28:00,482 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 240 transitions. [2024-09-13 10:28:00,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2024-09-13 10:28:00,483 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 10:28:00,483 INFO L216 NwaCegarLoop]: trace histogram [6, 6, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 10:28:00,501 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-09-13 10:28:00,683 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 10:28:00,684 INFO L399 AbstractCegarLoop]: === Iteration 7 === Targeting fiboErr0ENSURES_VIOLATIONPOST_CONDITION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, fiboErr0ENSURES_VIOLATIONPOST_CONDITION] === [2024-09-13 10:28:00,684 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 10:28:00,684 INFO L85 PathProgramCache]: Analyzing trace with hash -851368470, now seen corresponding path program 1 times [2024-09-13 10:28:00,684 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 10:28:00,684 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [532088850] [2024-09-13 10:28:00,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 10:28:00,685 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 10:28:00,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:28:00,805 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2024-09-13 10:28:00,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:28:00,810 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2024-09-13 10:28:00,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:28:00,844 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 28 proven. 24 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-09-13 10:28:00,845 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 10:28:00,846 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [532088850] [2024-09-13 10:28:00,846 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [532088850] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 10:28:00,846 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1354523352] [2024-09-13 10:28:00,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 10:28:00,846 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 10:28:00,847 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 10:28:00,848 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 10:28:00,850 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 10:28:00,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:28:00,888 INFO L262 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-09-13 10:28:00,890 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 10:28:00,935 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 30 proven. 24 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-09-13 10:28:00,935 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 10:28:01,064 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 30 proven. 24 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-09-13 10:28:01,064 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1354523352] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 10:28:01,064 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-13 10:28:01,065 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 15 [2024-09-13 10:28:01,065 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [587866689] [2024-09-13 10:28:01,065 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-13 10:28:01,065 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-09-13 10:28:01,065 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 10:28:01,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-09-13 10:28:01,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2024-09-13 10:28:01,067 INFO L87 Difference]: Start difference. First operand 138 states and 240 transitions. Second operand has 15 states, 14 states have (on average 2.0) internal successors, (28), 11 states have internal predecessors, (28), 5 states have call successors, (6), 5 states have call predecessors, (6), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2024-09-13 10:28:01,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 10:28:01,335 INFO L93 Difference]: Finished difference Result 86 states and 100 transitions. [2024-09-13 10:28:01,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-09-13 10:28:01,336 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 2.0) internal successors, (28), 11 states have internal predecessors, (28), 5 states have call successors, (6), 5 states have call predecessors, (6), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 32 [2024-09-13 10:28:01,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 10:28:01,337 INFO L225 Difference]: With dead ends: 86 [2024-09-13 10:28:01,337 INFO L226 Difference]: Without dead ends: 86 [2024-09-13 10:28:01,340 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 59 SyntacticMatches, 10 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=219, Invalid=537, Unknown=0, NotChecked=0, Total=756 [2024-09-13 10:28:01,341 INFO L434 NwaCegarLoop]: 11 mSDtfsCounter, 107 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 184 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 242 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 184 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-13 10:28:01,341 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [108 Valid, 48 Invalid, 242 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 184 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-13 10:28:01,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2024-09-13 10:28:01,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 79. [2024-09-13 10:28:01,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 52 states have (on average 1.1538461538461537) internal successors, (60), 54 states have internal predecessors, (60), 16 states have call successors, (16), 8 states have call predecessors, (16), 9 states have return successors, (20), 16 states have call predecessors, (20), 14 states have call successors, (20) [2024-09-13 10:28:01,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 96 transitions. [2024-09-13 10:28:01,352 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 96 transitions. Word has length 32 [2024-09-13 10:28:01,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 10:28:01,352 INFO L474 AbstractCegarLoop]: Abstraction has 79 states and 96 transitions. [2024-09-13 10:28:01,355 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 2.0) internal successors, (28), 11 states have internal predecessors, (28), 5 states have call successors, (6), 5 states have call predecessors, (6), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2024-09-13 10:28:01,355 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 96 transitions. [2024-09-13 10:28:01,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2024-09-13 10:28:01,356 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 10:28:01,356 INFO L216 NwaCegarLoop]: trace histogram [9, 8, 7, 7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 10:28:01,374 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 10:28:01,557 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2024-09-13 10:28:01,558 INFO L399 AbstractCegarLoop]: === Iteration 8 === Targeting fiboErr0ENSURES_VIOLATIONPOST_CONDITION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, fiboErr0ENSURES_VIOLATIONPOST_CONDITION] === [2024-09-13 10:28:01,558 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 10:28:01,558 INFO L85 PathProgramCache]: Analyzing trace with hash 1641789625, now seen corresponding path program 2 times [2024-09-13 10:28:01,558 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 10:28:01,558 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1721871248] [2024-09-13 10:28:01,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 10:28:01,559 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 10:28:01,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:28:01,722 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2024-09-13 10:28:01,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:28:01,726 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2024-09-13 10:28:01,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:28:01,730 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 80 proven. 35 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-09-13 10:28:01,730 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 10:28:01,730 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1721871248] [2024-09-13 10:28:01,731 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1721871248] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 10:28:01,731 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1205821702] [2024-09-13 10:28:01,731 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-13 10:28:01,731 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 10:28:01,731 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 10:28:01,733 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 10:28:01,735 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 10:28:01,778 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-13 10:28:01,779 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 10:28:01,780 INFO L262 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-09-13 10:28:01,781 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 10:28:01,850 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 111 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2024-09-13 10:28:01,850 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-13 10:28:01,850 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1205821702] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-13 10:28:01,850 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-09-13 10:28:01,850 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [14] total 16 [2024-09-13 10:28:01,851 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1445049883] [2024-09-13 10:28:01,851 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-13 10:28:01,851 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-09-13 10:28:01,851 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 10:28:01,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-09-13 10:28:01,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2024-09-13 10:28:01,853 INFO L87 Difference]: Start difference. First operand 79 states and 96 transitions. Second operand has 15 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 8 states have internal predecessors, (27), 7 states have call successors, (8), 7 states have call predecessors, (8), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-09-13 10:28:02,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 10:28:02,045 INFO L93 Difference]: Finished difference Result 55 states and 58 transitions. [2024-09-13 10:28:02,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-09-13 10:28:02,046 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 8 states have internal predecessors, (27), 7 states have call successors, (8), 7 states have call predecessors, (8), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 43 [2024-09-13 10:28:02,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 10:28:02,047 INFO L225 Difference]: With dead ends: 55 [2024-09-13 10:28:02,047 INFO L226 Difference]: Without dead ends: 54 [2024-09-13 10:28:02,047 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=152, Invalid=354, Unknown=0, NotChecked=0, Total=506 [2024-09-13 10:28:02,048 INFO L434 NwaCegarLoop]: 12 mSDtfsCounter, 73 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 239 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 275 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 239 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-13 10:28:02,048 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [74 Valid, 57 Invalid, 275 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 239 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-13 10:28:02,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2024-09-13 10:28:02,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 52. [2024-09-13 10:28:02,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 35 states have (on average 1.0857142857142856) internal successors, (38), 36 states have internal predecessors, (38), 9 states have call successors, (9), 6 states have call predecessors, (9), 6 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2024-09-13 10:28:02,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 56 transitions. [2024-09-13 10:28:02,056 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 56 transitions. Word has length 43 [2024-09-13 10:28:02,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 10:28:02,057 INFO L474 AbstractCegarLoop]: Abstraction has 52 states and 56 transitions. [2024-09-13 10:28:02,057 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 8 states have internal predecessors, (27), 7 states have call successors, (8), 7 states have call predecessors, (8), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-09-13 10:28:02,057 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 56 transitions. [2024-09-13 10:28:02,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2024-09-13 10:28:02,061 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 10:28:02,061 INFO L216 NwaCegarLoop]: trace histogram [7, 6, 4, 4, 4, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1] [2024-09-13 10:28:02,079 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-09-13 10:28:02,261 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 10:28:02,262 INFO L399 AbstractCegarLoop]: === Iteration 9 === Targeting fiboErr0ENSURES_VIOLATIONPOST_CONDITION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, fiboErr0ENSURES_VIOLATIONPOST_CONDITION] === [2024-09-13 10:28:02,262 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 10:28:02,262 INFO L85 PathProgramCache]: Analyzing trace with hash 771033264, now seen corresponding path program 3 times [2024-09-13 10:28:02,262 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 10:28:02,263 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [286805552] [2024-09-13 10:28:02,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 10:28:02,263 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 10:28:02,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:28:02,461 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2024-09-13 10:28:02,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:28:02,521 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-13 10:28:02,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:28:02,538 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-13 10:28:02,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:28:02,564 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2024-09-13 10:28:02,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:28:02,575 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 2 proven. 59 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-09-13 10:28:02,576 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 10:28:02,576 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [286805552] [2024-09-13 10:28:02,576 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [286805552] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 10:28:02,576 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [611843118] [2024-09-13 10:28:02,576 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-13 10:28:02,576 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 10:28:02,577 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 10:28:02,586 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 10:28:02,588 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 10:28:02,637 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2024-09-13 10:28:02,638 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 10:28:02,640 INFO L262 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 31 conjuncts are in the unsatisfiable core [2024-09-13 10:28:02,641 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 10:28:02,702 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 2 proven. 59 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-09-13 10:28:02,702 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 10:28:03,252 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-09-13 10:28:03,252 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [611843118] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 10:28:03,253 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-13 10:28:03,253 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 24 [2024-09-13 10:28:03,253 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [867643091] [2024-09-13 10:28:03,253 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-13 10:28:03,254 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-09-13 10:28:03,254 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 10:28:03,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-09-13 10:28:03,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=532, Unknown=0, NotChecked=0, Total=600 [2024-09-13 10:28:03,255 INFO L87 Difference]: Start difference. First operand 52 states and 56 transitions. Second operand has 25 states, 22 states have (on average 1.6363636363636365) internal successors, (36), 17 states have internal predecessors, (36), 12 states have call successors, (12), 7 states have call predecessors, (12), 2 states have return successors, (7), 7 states have call predecessors, (7), 6 states have call successors, (7) [2024-09-13 10:28:03,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 10:28:03,693 INFO L93 Difference]: Finished difference Result 52 states and 54 transitions. [2024-09-13 10:28:03,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-09-13 10:28:03,694 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 22 states have (on average 1.6363636363636365) internal successors, (36), 17 states have internal predecessors, (36), 12 states have call successors, (12), 7 states have call predecessors, (12), 2 states have return successors, (7), 7 states have call predecessors, (7), 6 states have call successors, (7) Word has length 41 [2024-09-13 10:28:03,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 10:28:03,695 INFO L225 Difference]: With dead ends: 52 [2024-09-13 10:28:03,695 INFO L226 Difference]: Without dead ends: 52 [2024-09-13 10:28:03,696 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=122, Invalid=934, Unknown=0, NotChecked=0, Total=1056 [2024-09-13 10:28:03,696 INFO L434 NwaCegarLoop]: 17 mSDtfsCounter, 40 mSDsluCounter, 125 mSDsCounter, 0 mSdLazyCounter, 577 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 142 SdHoareTripleChecker+Invalid, 596 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 577 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-13 10:28:03,696 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 142 Invalid, 596 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 577 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-13 10:28:03,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2024-09-13 10:28:03,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2024-09-13 10:28:03,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 35 states have (on average 1.0285714285714285) internal successors, (36), 36 states have internal predecessors, (36), 9 states have call successors, (9), 6 states have call predecessors, (9), 6 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2024-09-13 10:28:03,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 54 transitions. [2024-09-13 10:28:03,699 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 54 transitions. Word has length 41 [2024-09-13 10:28:03,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 10:28:03,700 INFO L474 AbstractCegarLoop]: Abstraction has 52 states and 54 transitions. [2024-09-13 10:28:03,700 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 22 states have (on average 1.6363636363636365) internal successors, (36), 17 states have internal predecessors, (36), 12 states have call successors, (12), 7 states have call predecessors, (12), 2 states have return successors, (7), 7 states have call predecessors, (7), 6 states have call successors, (7) [2024-09-13 10:28:03,700 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 54 transitions. [2024-09-13 10:28:03,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2024-09-13 10:28:03,701 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 10:28:03,702 INFO L216 NwaCegarLoop]: trace histogram [15, 14, 12, 7, 7, 7, 7, 7, 7, 7, 5, 3, 1, 1, 1] [2024-09-13 10:28:03,717 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-09-13 10:28:03,902 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 10:28:03,902 INFO L399 AbstractCegarLoop]: === Iteration 10 === Targeting fiboErr0ENSURES_VIOLATIONPOST_CONDITION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, fiboErr0ENSURES_VIOLATIONPOST_CONDITION] === [2024-09-13 10:28:03,903 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 10:28:03,903 INFO L85 PathProgramCache]: Analyzing trace with hash -1240694291, now seen corresponding path program 4 times [2024-09-13 10:28:03,903 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 10:28:03,903 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1516513014] [2024-09-13 10:28:03,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 10:28:03,903 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 10:28:03,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:28:04,341 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-13 10:28:04,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:28:04,485 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-13 10:28:04,490 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 10:28:04,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:28:04,618 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-13 10:28:04,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:28:04,629 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-13 10:28:04,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:28:04,654 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-09-13 10:28:04,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:28:04,674 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2024-09-13 10:28:04,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:28:04,705 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-13 10:28:04,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:28:04,716 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-13 10:28:04,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:28:04,733 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2024-09-13 10:28:04,743 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 10:28:04,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:28:04,831 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-13 10:28:04,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:28:04,840 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-13 10:28:04,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:28:04,851 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-09-13 10:28:04,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:28:04,862 INFO L134 CoverageAnalysis]: Checked inductivity of 556 backedges. 0 proven. 216 refuted. 0 times theorem prover too weak. 340 trivial. 0 not checked. [2024-09-13 10:28:04,862 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 10:28:04,862 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1516513014] [2024-09-13 10:28:04,862 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1516513014] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 10:28:04,862 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [827742223] [2024-09-13 10:28:04,863 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-13 10:28:04,863 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 10:28:04,863 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 10:28:04,865 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-13 10:28:04,866 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-09-13 10:28:04,956 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-13 10:28:04,956 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 10:28:04,959 INFO L262 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 70 conjuncts are in the unsatisfiable core [2024-09-13 10:28:04,963 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 10:28:05,333 INFO L134 CoverageAnalysis]: Checked inductivity of 556 backedges. 29 proven. 292 refuted. 0 times theorem prover too weak. 235 trivial. 0 not checked. [2024-09-13 10:28:05,333 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 10:28:06,301 INFO L134 CoverageAnalysis]: Checked inductivity of 556 backedges. 25 proven. 318 refuted. 0 times theorem prover too weak. 213 trivial. 0 not checked. [2024-09-13 10:28:06,302 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [827742223] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 10:28:06,302 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-13 10:28:06,302 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 21, 25] total 40 [2024-09-13 10:28:06,302 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [390440117] [2024-09-13 10:28:06,302 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-13 10:28:06,303 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2024-09-13 10:28:06,303 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 10:28:06,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2024-09-13 10:28:06,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=1492, Unknown=0, NotChecked=0, Total=1640 [2024-09-13 10:28:06,305 INFO L87 Difference]: Start difference. First operand 52 states and 54 transitions. Second operand has 41 states, 38 states have (on average 1.631578947368421) internal successors, (62), 29 states have internal predecessors, (62), 15 states have call successors, (16), 2 states have call predecessors, (16), 9 states have return successors, (24), 19 states have call predecessors, (24), 14 states have call successors, (24) [2024-09-13 10:28:06,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 10:28:06,945 INFO L93 Difference]: Finished difference Result 59 states and 62 transitions. [2024-09-13 10:28:06,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-09-13 10:28:06,946 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 38 states have (on average 1.631578947368421) internal successors, (62), 29 states have internal predecessors, (62), 15 states have call successors, (16), 2 states have call predecessors, (16), 9 states have return successors, (24), 19 states have call predecessors, (24), 14 states have call successors, (24) Word has length 101 [2024-09-13 10:28:06,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 10:28:06,948 INFO L225 Difference]: With dead ends: 59 [2024-09-13 10:28:06,948 INFO L226 Difference]: Without dead ends: 59 [2024-09-13 10:28:06,949 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 281 GetRequests, 224 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 739 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=368, Invalid=2938, Unknown=0, NotChecked=0, Total=3306 [2024-09-13 10:28:06,951 INFO L434 NwaCegarLoop]: 10 mSDtfsCounter, 67 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 855 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 903 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 855 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-09-13 10:28:06,951 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [71 Valid, 84 Invalid, 903 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 855 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-09-13 10:28:06,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2024-09-13 10:28:06,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 51. [2024-09-13 10:28:06,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 35 states have (on average 1.0) internal successors, (35), 35 states have internal predecessors, (35), 9 states have call successors, (9), 6 states have call predecessors, (9), 6 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2024-09-13 10:28:06,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 53 transitions. [2024-09-13 10:28:06,959 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 53 transitions. Word has length 101 [2024-09-13 10:28:06,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 10:28:06,960 INFO L474 AbstractCegarLoop]: Abstraction has 51 states and 53 transitions. [2024-09-13 10:28:06,960 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 38 states have (on average 1.631578947368421) internal successors, (62), 29 states have internal predecessors, (62), 15 states have call successors, (16), 2 states have call predecessors, (16), 9 states have return successors, (24), 19 states have call predecessors, (24), 14 states have call successors, (24) [2024-09-13 10:28:06,960 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 53 transitions. [2024-09-13 10:28:06,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2024-09-13 10:28:06,965 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 10:28:06,965 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 10:28:06,982 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-09-13 10:28:07,166 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,9 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 10:28:07,166 INFO L399 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, fiboErr0ENSURES_VIOLATIONPOST_CONDITION] === [2024-09-13 10:28:07,166 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 10:28:07,166 INFO L85 PathProgramCache]: Analyzing trace with hash -151965584, now seen corresponding path program 1 times [2024-09-13 10:28:07,167 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 10:28:07,167 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [332649257] [2024-09-13 10:28:07,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 10:28:07,167 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 10:28:07,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:28:07,546 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-09-13 10:28:07,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:28:07,762 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-13 10:28:07,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:28:07,868 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-13 10:28:07,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:28:07,939 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-13 10:28:07,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:28:07,987 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-13 10:28:07,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:28:07,995 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-13 10:28:07,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:28:08,017 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-09-13 10:28:08,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:28:08,025 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2024-09-13 10:28:08,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:28:08,052 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-13 10:28:08,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:28:08,060 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-13 10:28:08,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:28:08,069 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2024-09-13 10:28:08,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:28:08,118 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-13 10:28:08,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:28:08,140 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-13 10:28:08,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:28:08,149 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-13 10:28:08,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:28:08,160 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-09-13 10:28:08,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:28:08,168 INFO L134 CoverageAnalysis]: Checked inductivity of 570 backedges. 0 proven. 185 refuted. 0 times theorem prover too weak. 385 trivial. 0 not checked. [2024-09-13 10:28:08,168 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 10:28:08,168 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [332649257] [2024-09-13 10:28:08,169 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [332649257] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 10:28:08,169 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [225457711] [2024-09-13 10:28:08,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 10:28:08,169 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 10:28:08,169 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 10:28:08,171 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-13 10:28:08,172 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-09-13 10:28:08,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:28:08,243 INFO L262 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 64 conjuncts are in the unsatisfiable core [2024-09-13 10:28:08,245 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 10:28:08,472 INFO L134 CoverageAnalysis]: Checked inductivity of 570 backedges. 7 proven. 200 refuted. 0 times theorem prover too weak. 363 trivial. 0 not checked. [2024-09-13 10:28:08,472 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 10:28:08,938 INFO L134 CoverageAnalysis]: Checked inductivity of 570 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 556 trivial. 0 not checked. [2024-09-13 10:28:08,938 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [225457711] provided 1 perfect and 1 imperfect interpolant sequences [2024-09-13 10:28:08,938 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-09-13 10:28:08,938 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [16, 17] total 23 [2024-09-13 10:28:08,938 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [618857492] [2024-09-13 10:28:08,939 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-13 10:28:08,939 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-09-13 10:28:08,939 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 10:28:08,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-09-13 10:28:08,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=453, Unknown=0, NotChecked=0, Total=506 [2024-09-13 10:28:08,940 INFO L87 Difference]: Start difference. First operand 51 states and 53 transitions. Second operand has 6 states, 4 states have (on average 3.25) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-13 10:28:08,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 10:28:08,975 INFO L93 Difference]: Finished difference Result 49 states and 51 transitions. [2024-09-13 10:28:08,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-09-13 10:28:08,976 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 4 states have (on average 3.25) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 105 [2024-09-13 10:28:08,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 10:28:08,976 INFO L225 Difference]: With dead ends: 49 [2024-09-13 10:28:08,976 INFO L226 Difference]: Without dead ends: 0 [2024-09-13 10:28:08,977 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 273 GetRequests, 249 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=61, Invalid=539, Unknown=0, NotChecked=0, Total=600 [2024-09-13 10:28:08,977 INFO L434 NwaCegarLoop]: 11 mSDtfsCounter, 1 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-13 10:28:08,977 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 47 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-13 10:28:08,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2024-09-13 10:28:08,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2024-09-13 10:28:08,978 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 10:28:08,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2024-09-13 10:28:08,978 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 105 [2024-09-13 10:28:08,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 10:28:08,978 INFO L474 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2024-09-13 10:28:08,978 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 4 states have (on average 3.25) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-13 10:28:08,979 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2024-09-13 10:28:08,979 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2024-09-13 10:28:08,982 INFO L785 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 2 remaining) [2024-09-13 10:28:08,982 INFO L785 garLoopResultBuilder]: Registering result SAFE for location fiboErr0ENSURES_VIOLATIONPOST_CONDITION (0 of 2 remaining) [2024-09-13 10:28:08,998 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-09-13 10:28:09,182 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2024-09-13 10:28:09,185 INFO L408 BasicCegarLoop]: Path program histogram: [4, 2, 1, 1, 1, 1, 1] [2024-09-13 10:28:09,187 INFO L165 ceAbstractionStarter]: Computing trace abstraction results [2024-09-13 10:28:09,189 INFO L201 PluginConnector]: Adding new model witness-2.1.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 13.09 10:28:09 BoogieIcfgContainer [2024-09-13 10:28:09,189 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2024-09-13 10:28:09,190 INFO L158 Benchmark]: Toolchain (without parser) took 15622.94ms. Allocated memory was 144.7MB in the beginning and 251.7MB in the end (delta: 107.0MB). Free memory was 73.8MB in the beginning and 79.9MB in the end (delta: -6.1MB). Peak memory consumption was 102.9MB. Max. memory is 16.1GB. [2024-09-13 10:28:09,190 INFO L158 Benchmark]: CDTParser took 0.12ms. Allocated memory is still 144.7MB. Free memory is still 109.1MB. There was no memory consumed. Max. memory is 16.1GB. [2024-09-13 10:28:09,190 INFO L158 Benchmark]: Witness Parser took 0.17ms. Allocated memory is still 144.7MB. Free memory is still 75.6MB. There was no memory consumed. Max. memory is 16.1GB. [2024-09-13 10:28:09,190 INFO L158 Benchmark]: CACSL2BoogieTranslator took 250.32ms. Allocated memory is still 144.7MB. Free memory was 73.5MB in the beginning and 60.9MB in the end (delta: 12.6MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2024-09-13 10:28:09,190 INFO L158 Benchmark]: Boogie Procedure Inliner took 24.59ms. Allocated memory is still 144.7MB. Free memory was 60.9MB in the beginning and 59.4MB in the end (delta: 1.5MB). There was no memory consumed. Max. memory is 16.1GB. [2024-09-13 10:28:09,190 INFO L158 Benchmark]: Boogie Preprocessor took 22.00ms. Allocated memory is still 144.7MB. Free memory was 59.4MB in the beginning and 58.1MB in the end (delta: 1.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-09-13 10:28:09,191 INFO L158 Benchmark]: RCFGBuilder took 273.88ms. Allocated memory was 144.7MB in the beginning and 174.1MB in the end (delta: 29.4MB). Free memory was 57.7MB in the beginning and 141.3MB in the end (delta: -83.5MB). Peak memory consumption was 18.7MB. Max. memory is 16.1GB. [2024-09-13 10:28:09,191 INFO L158 Benchmark]: TraceAbstraction took 15046.70ms. Allocated memory was 174.1MB in the beginning and 251.7MB in the end (delta: 77.6MB). Free memory was 140.2MB in the beginning and 79.9MB in the end (delta: 60.2MB). Peak memory consumption was 136.7MB. Max. memory is 16.1GB. [2024-09-13 10:28:09,192 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.12ms. Allocated memory is still 144.7MB. Free memory is still 109.1MB. There was no memory consumed. Max. memory is 16.1GB. * Witness Parser took 0.17ms. Allocated memory is still 144.7MB. Free memory is still 75.6MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 250.32ms. Allocated memory is still 144.7MB. Free memory was 73.5MB in the beginning and 60.9MB in the end (delta: 12.6MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 24.59ms. Allocated memory is still 144.7MB. Free memory was 60.9MB in the beginning and 59.4MB in the end (delta: 1.5MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 22.00ms. Allocated memory is still 144.7MB. Free memory was 59.4MB in the beginning and 58.1MB in the end (delta: 1.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 273.88ms. Allocated memory was 144.7MB in the beginning and 174.1MB in the end (delta: 29.4MB). Free memory was 57.7MB in the beginning and 141.3MB in the end (delta: -83.5MB). Peak memory consumption was 18.7MB. Max. memory is 16.1GB. * TraceAbstraction took 15046.70ms. Allocated memory was 174.1MB in the beginning and 251.7MB in the end (delta: 77.6MB). Free memory was 140.2MB in the beginning and 79.9MB in the end (delta: 60.2MB). Peak memory consumption was 136.7MB. 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: 15.0s, OverallIterations: 11, TraceHistogramMax: 15, PathProgramHistogramMax: 4, EmptinessCheckTime: 0.0s, AutomataDifference: 4.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 615 SdHoareTripleChecker+Valid, 2.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 585 mSDsluCounter, 771 SdHoareTripleChecker+Invalid, 1.7s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 610 mSDsCounter, 343 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 3267 IncrementalHoareTripleChecker+Invalid, 3610 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 343 mSolverCounterUnsat, 161 mSDtfsCounter, 3267 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1087 GetRequests, 799 SyntacticMatches, 22 SemanticMatches, 266 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1932 ImplicationChecksByTransitivity, 4.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=138occurred in iteration=6, InterpolantAutomatonStates: 173, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 11 MinimizatonAttempts, 63 StatesRemovedByMinimization, 9 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 8.0s InterpolantComputationTime, 841 NumberOfCodeBlocks, 825 NumberOfCodeBlocksAsserted, 28 NumberOfCheckSat, 1164 ConstructedInterpolants, 0 QuantifiedInterpolants, 3682 SizeOfPredicates, 28 NumberOfNonLiveVariables, 1106 ConjunctsInSsa, 243 ConjunctsInUnsatCore, 27 InterpolantComputations, 5 PerfectInterpolantSequences, 2674/4408 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 2 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2024-09-13 10:28:09,214 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