./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/recursive-simple/fibo_2calls_8-1.c --full-output --witness-type correctness_witness --validate ../results/automizer-verification-files/SV-COMP24_unreach-call/fibo_2calls_8-1.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_2calls_8-1.c ../results/automizer-verification-files/SV-COMP24_unreach-call/fibo_2calls_8-1.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 10:27:48,195 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-09-13 10:27:48,262 INFO L114 SettingsManager]: Loading settings from /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-09-13 10:27:48,268 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-09-13 10:27:48,269 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-09-13 10:27:48,298 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-09-13 10:27:48,299 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-09-13 10:27:48,299 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-09-13 10:27:48,300 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-09-13 10:27:48,300 INFO L153 SettingsManager]: * Use memory slicer=true [2024-09-13 10:27:48,300 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-09-13 10:27:48,301 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-09-13 10:27:48,301 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-09-13 10:27:48,302 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-09-13 10:27:48,302 INFO L153 SettingsManager]: * Use SBE=true [2024-09-13 10:27:48,302 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-09-13 10:27:48,303 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-09-13 10:27:48,303 INFO L153 SettingsManager]: * sizeof long=4 [2024-09-13 10:27:48,303 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-09-13 10:27:48,304 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-09-13 10:27:48,307 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-09-13 10:27:48,308 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-09-13 10:27:48,308 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-09-13 10:27:48,308 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-09-13 10:27:48,308 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-09-13 10:27:48,309 INFO L153 SettingsManager]: * sizeof long double=12 [2024-09-13 10:27:48,309 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-09-13 10:27:48,309 INFO L153 SettingsManager]: * Use constant arrays=true [2024-09-13 10:27:48,309 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-09-13 10:27:48,310 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-09-13 10:27:48,310 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-09-13 10:27:48,310 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-09-13 10:27:48,311 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-13 10:27:48,311 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-09-13 10:27:48,311 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-09-13 10:27:48,312 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-09-13 10:27:48,312 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-09-13 10:27:48,312 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-09-13 10:27:48,313 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-09-13 10:27:48,313 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-09-13 10:27:48,313 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-09-13 10:27:48,314 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-09-13 10:27:48,314 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Positions where we compute the Hoare Annotation -> None [2024-09-13 10:27:48,567 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-09-13 10:27:48,594 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-09-13 10:27:48,596 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-09-13 10:27:48,597 INFO L270 PluginConnector]: Initializing CDTParser... [2024-09-13 10:27:48,598 INFO L274 PluginConnector]: CDTParser initialized [2024-09-13 10:27:48,599 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/certificate-witnesses-artifact/automizer/../sv-benchmarks/c/recursive-simple/fibo_2calls_8-1.c [2024-09-13 10:27:50,038 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-09-13 10:27:50,237 INFO L384 CDTParser]: Found 1 translation units. [2024-09-13 10:27:50,238 INFO L180 CDTParser]: Scanning /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/recursive-simple/fibo_2calls_8-1.c [2024-09-13 10:27:50,247 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/certificate-witnesses-artifact/automizer/data/84332aa07/2bc378b9fd0d4a038db8415b15a79e51/FLAG5d4b1bf6e [2024-09-13 10:27:50,267 INFO L435 CDTParser]: Successfully deleted /storage/repos/certificate-witnesses-artifact/automizer/data/84332aa07/2bc378b9fd0d4a038db8415b15a79e51 [2024-09-13 10:27:50,270 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-09-13 10:27:50,271 INFO L274 PluginConnector]: Witness Parser initialized [2024-09-13 10:27:50,272 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/certificate-witnesses-artifact/automizer/../results/automizer-verification-files/SV-COMP24_unreach-call/fibo_2calls_8-1.yml/witness-2.1.yml [2024-09-13 10:27:50,325 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-09-13 10:27:50,326 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-09-13 10:27:50,329 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-09-13 10:27:50,329 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-09-13 10:27:50,334 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-09-13 10:27:50,334 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.09 10:27:50" (1/2) ... [2024-09-13 10:27:50,337 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4b66f2ca and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 10:27:50, skipping insertion in model container [2024-09-13 10:27:50,337 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.09 10:27:50" (1/2) ... [2024-09-13 10:27:50,339 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@7ff2d331 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 10:27:50, skipping insertion in model container [2024-09-13 10:27:50,339 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 10:27:50" (2/2) ... [2024-09-13 10:27:50,339 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4b66f2ca and model type witness-2.1.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 13.09 10:27:50, skipping insertion in model container [2024-09-13 10:27:50,339 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 10:27:50" (2/2) ... [2024-09-13 10:27:50,347 INFO L93 nessWitnessExtractor]: Found the following entries in the witness: [2024-09-13 10:27:50,350 INFO L1541 ArrayList]: Function contract at [L19]: requires null, ensures (((((\old(n) < 6) || (\result == 13)) || (7 < \old(n))) && (((\result == 0) || (\old(n) == 1)) || (1 < \old(n)))) && (((\result == 1) || (\old(n) < 1)) || (3 < \old(n)))) [2024-09-13 10:27:50,350 INFO L1541 ArrayList]: Function contract at [L9]: requires null, ensures (((((((((2 == \result) || (\old(n) < 2)) || (\old(n) == 4)) || (5 < \old(n))) && (((\old(n) < 4) || (3 == \result)) || (5 < \old(n)))) && ((((\old(n) < 4) || (\old(n) == 4)) || (8 == \result)) || (6 < \old(n)))) && ((\old(n) != 1) || (\result == 1))) && (((\result == 0) || ((\old(n) == 1) && (\result == 1))) || (2 < \old(n)))) && ((21 == \result) || (\old(n) != 8))) [2024-09-13 10:27:50,368 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-09-13 10:27:50,534 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_2calls_8-1.c[947,960] [2024-09-13 10:27:50,547 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-13 10:27:50,558 INFO L200 MainTranslator]: Completed pre-run Start Parsing Global Start Parsing Global [2024-09-13 10:27:50,610 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_2calls_8-1.c[947,960] [2024-09-13 10:27:50,611 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-13 10:27:50,626 INFO L204 MainTranslator]: Completed translation [2024-09-13 10:27:50,627 INFO L201 PluginConnector]: Adding new model witness-2.1.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 13.09 10:27:50 WrapperNode [2024-09-13 10:27:50,628 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-09-13 10:27:50,629 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-09-13 10:27:50,629 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-09-13 10:27:50,629 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-09-13 10:27:50,635 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 10:27:50" (1/1) ... [2024-09-13 10:27:50,641 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 10:27:50" (1/1) ... [2024-09-13 10:27:50,657 INFO L138 Inliner]: procedures = 14, calls = 12, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 20 [2024-09-13 10:27:50,658 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-09-13 10:27:50,658 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-09-13 10:27:50,659 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-09-13 10:27:50,659 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-09-13 10:27:50,668 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 10:27:50" (1/1) ... [2024-09-13 10:27:50,668 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 10:27:50" (1/1) ... [2024-09-13 10:27:50,670 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 10:27:50" (1/1) ... [2024-09-13 10:27:50,684 WARN L109 MemorySlicer]: Omit memory slicing because it failed with the following exception: Unsupported: Procedure fibo2 is not part of the Ultimate memory model but has specification other that is not a ModifiesSpecification [2024-09-13 10:27:50,684 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 10:27:50" (1/1) ... [2024-09-13 10:27:50,685 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 10:27:50" (1/1) ... [2024-09-13 10:27:50,688 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 10:27:50" (1/1) ... [2024-09-13 10:27:50,690 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 10:27:50" (1/1) ... [2024-09-13 10:27:50,691 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 10:27:50" (1/1) ... [2024-09-13 10:27:50,692 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 10:27:50" (1/1) ... [2024-09-13 10:27:50,693 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-09-13 10:27:50,694 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-09-13 10:27:50,694 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-09-13 10:27:50,695 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-09-13 10:27:50,695 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 10:27:50" (1/1) ... [2024-09-13 10:27:50,700 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-13 10:27:50,706 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 10:27:50,721 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 10:27:50,726 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 10:27:50,770 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-09-13 10:27:50,770 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2024-09-13 10:27:50,770 INFO L130 BoogieDeclarations]: Found specification of procedure fibo2 [2024-09-13 10:27:50,771 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo2 [2024-09-13 10:27:50,771 INFO L130 BoogieDeclarations]: Found specification of procedure fibo1 [2024-09-13 10:27:50,771 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo1 [2024-09-13 10:27:50,771 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-09-13 10:27:50,771 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-09-13 10:27:50,834 INFO L242 CfgBuilder]: Building ICFG [2024-09-13 10:27:50,836 INFO L268 CfgBuilder]: Building CFG for each procedure with an implementation [2024-09-13 10:27:51,062 INFO L? ?]: Removed 13 outVars from TransFormulas that were not future-live. [2024-09-13 10:27:51,064 INFO L291 CfgBuilder]: Performing block encoding [2024-09-13 10:27:51,092 INFO L313 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-09-13 10:27:51,093 INFO L318 CfgBuilder]: Removed 0 assume(true) statements. [2024-09-13 10:27:51,093 INFO L201 PluginConnector]: Adding new model witness-2.1.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.09 10:27:51 BoogieIcfgContainer [2024-09-13 10:27:51,094 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-09-13 10:27:51,097 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-09-13 10:27:51,097 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-09-13 10:27:51,101 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-09-13 10:27:51,102 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.09 10:27:50" (1/4) ... [2024-09-13 10:27:51,104 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3218e299 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.09 10:27:51, skipping insertion in model container [2024-09-13 10:27:51,104 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 10:27:50" (2/4) ... [2024-09-13 10:27:51,105 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3218e299 and model type witness-2.1.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 13.09 10:27:51, skipping insertion in model container [2024-09-13 10:27:51,105 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 10:27:50" (3/4) ... [2024-09-13 10:27:51,105 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3218e299 and model type witness-2.1.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 13.09 10:27:51, skipping insertion in model container [2024-09-13 10:27:51,106 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 10:27:51" (4/4) ... [2024-09-13 10:27:51,107 INFO L112 eAbstractionObserver]: Analyzing ICFG fibo_2calls_8-1.c [2024-09-13 10:27:51,127 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-09-13 10:27:51,127 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-09-13 10:27:51,187 INFO L335 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-09-13 10:27:51,196 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;@1685d022, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-09-13 10:27:51,196 INFO L337 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2024-09-13 10:27:51,201 INFO L276 IsEmpty]: Start isEmpty. Operand has 28 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 20 states have internal predecessors, (25), 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 10:27:51,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2024-09-13 10:27:51,213 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 10:27:51,214 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2024-09-13 10:27:51,218 INFO L399 AbstractCegarLoop]: === Iteration 1 === Targeting fibo1Err0ENSURES_VIOLATIONPOST_CONDITION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, fibo2Err0ENSURES_VIOLATIONPOST_CONDITION, fibo1Err0ENSURES_VIOLATIONPOST_CONDITION] === [2024-09-13 10:27:51,223 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 10:27:51,225 INFO L85 PathProgramCache]: Analyzing trace with hash 83656213, now seen corresponding path program 1 times [2024-09-13 10:27:51,234 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 10:27:51,236 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1773754275] [2024-09-13 10:27:51,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 10:27:51,236 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 10:27:51,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:27:51,480 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 10:27:51,481 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 10:27:51,481 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1773754275] [2024-09-13 10:27:51,482 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1773754275] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-13 10:27:51,482 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-13 10:27:51,482 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-09-13 10:27:51,483 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [418925376] [2024-09-13 10:27:51,484 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-13 10:27:51,488 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-13 10:27:51,488 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 10:27:51,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-13 10:27:51,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-13 10:27:51,520 INFO L87 Difference]: Start difference. First operand has 28 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 20 states have internal predecessors, (25), 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) Second operand has 5 states, 4 states have (on average 1.0) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-13 10:27:51,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 10:27:51,637 INFO L93 Difference]: Finished difference Result 38 states and 45 transitions. [2024-09-13 10:27:51,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-13 10:27:51,640 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.0) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2024-09-13 10:27:51,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 10:27:51,646 INFO L225 Difference]: With dead ends: 38 [2024-09-13 10:27:51,647 INFO L226 Difference]: Without dead ends: 36 [2024-09-13 10:27:51,649 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 10:27:51,655 INFO L434 NwaCegarLoop]: 28 mSDtfsCounter, 17 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-13 10:27:51,656 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 103 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-13 10:27:51,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2024-09-13 10:27:51,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 35. [2024-09-13 10:27:51,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 22 states have (on average 1.3181818181818181) internal successors, (29), 24 states have internal predecessors, (29), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2024-09-13 10:27:51,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 43 transitions. [2024-09-13 10:27:51,686 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 43 transitions. Word has length 5 [2024-09-13 10:27:51,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 10:27:51,686 INFO L474 AbstractCegarLoop]: Abstraction has 35 states and 43 transitions. [2024-09-13 10:27:51,687 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.0) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-13 10:27:51,687 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 43 transitions. [2024-09-13 10:27:51,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2024-09-13 10:27:51,687 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 10:27:51,687 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 10:27:51,688 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-09-13 10:27:51,688 INFO L399 AbstractCegarLoop]: === Iteration 2 === Targeting fibo2Err0ENSURES_VIOLATIONPOST_CONDITION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, fibo2Err0ENSURES_VIOLATIONPOST_CONDITION, fibo1Err0ENSURES_VIOLATIONPOST_CONDITION] === [2024-09-13 10:27:51,688 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 10:27:51,688 INFO L85 PathProgramCache]: Analyzing trace with hash 422480245, now seen corresponding path program 1 times [2024-09-13 10:27:51,689 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 10:27:51,689 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [946536150] [2024-09-13 10:27:51,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 10:27:51,689 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 10:27:51,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:27:51,791 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 10:27:51,791 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 10:27:51,791 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [946536150] [2024-09-13 10:27:51,792 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [946536150] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-13 10:27:51,792 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-13 10:27:51,792 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-09-13 10:27:51,793 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [484657224] [2024-09-13 10:27:51,793 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-13 10:27:51,794 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-09-13 10:27:51,794 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 10:27:51,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-09-13 10:27:51,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-09-13 10:27:51,795 INFO L87 Difference]: Start difference. First operand 35 states and 43 transitions. Second operand has 6 states, 5 states have (on average 1.4) internal successors, (7), 5 states have internal predecessors, (7), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-13 10:27:51,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 10:27:51,891 INFO L93 Difference]: Finished difference Result 54 states and 69 transitions. [2024-09-13 10:27:51,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-09-13 10:27:51,893 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.4) internal successors, (7), 5 states have internal predecessors, (7), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2024-09-13 10:27:51,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 10:27:51,895 INFO L225 Difference]: With dead ends: 54 [2024-09-13 10:27:51,895 INFO L226 Difference]: Without dead ends: 54 [2024-09-13 10:27:51,896 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-09-13 10:27:51,898 INFO L434 NwaCegarLoop]: 27 mSDtfsCounter, 27 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-13 10:27:51,899 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 91 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-13 10:27:51,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2024-09-13 10:27:51,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 44. [2024-09-13 10:27:51,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 28 states have (on average 1.3214285714285714) internal successors, (37), 30 states have internal predecessors, (37), 9 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2024-09-13 10:27:51,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 55 transitions. [2024-09-13 10:27:51,917 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 55 transitions. Word has length 9 [2024-09-13 10:27:51,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 10:27:51,918 INFO L474 AbstractCegarLoop]: Abstraction has 44 states and 55 transitions. [2024-09-13 10:27:51,918 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 1.4) internal successors, (7), 5 states have internal predecessors, (7), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-13 10:27:51,918 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 55 transitions. [2024-09-13 10:27:51,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2024-09-13 10:27:51,919 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 10:27:51,919 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 10:27:51,919 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-09-13 10:27:51,919 INFO L399 AbstractCegarLoop]: === Iteration 3 === Targeting fibo2Err0ENSURES_VIOLATIONPOST_CONDITION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, fibo2Err0ENSURES_VIOLATIONPOST_CONDITION, fibo1Err0ENSURES_VIOLATIONPOST_CONDITION] === [2024-09-13 10:27:51,920 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 10:27:51,920 INFO L85 PathProgramCache]: Analyzing trace with hash 211986483, now seen corresponding path program 1 times [2024-09-13 10:27:51,920 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 10:27:51,922 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [327365817] [2024-09-13 10:27:51,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 10:27:51,923 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 10:27:51,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:27:52,037 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 10:27:52,037 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 10:27:52,038 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [327365817] [2024-09-13 10:27:52,038 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [327365817] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-13 10:27:52,038 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-13 10:27:52,038 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-09-13 10:27:52,038 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1276323603] [2024-09-13 10:27:52,038 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-13 10:27:52,039 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-09-13 10:27:52,039 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 10:27:52,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-09-13 10:27:52,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2024-09-13 10:27:52,040 INFO L87 Difference]: Start difference. First operand 44 states and 55 transitions. Second operand has 7 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-13 10:27:52,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 10:27:52,150 INFO L93 Difference]: Finished difference Result 55 states and 66 transitions. [2024-09-13 10:27:52,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-09-13 10:27:52,151 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2024-09-13 10:27:52,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 10:27:52,152 INFO L225 Difference]: With dead ends: 55 [2024-09-13 10:27:52,152 INFO L226 Difference]: Without dead ends: 55 [2024-09-13 10:27:52,152 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-09-13 10:27:52,153 INFO L434 NwaCegarLoop]: 28 mSDtfsCounter, 26 mSDsluCounter, 121 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 149 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-13 10:27:52,154 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 149 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-13 10:27:52,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2024-09-13 10:27:52,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 53. [2024-09-13 10:27:52,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 34 states have (on average 1.2941176470588236) internal successors, (44), 36 states have internal predecessors, (44), 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 10:27:52,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 66 transitions. [2024-09-13 10:27:52,163 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 66 transitions. Word has length 10 [2024-09-13 10:27:52,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 10:27:52,163 INFO L474 AbstractCegarLoop]: Abstraction has 53 states and 66 transitions. [2024-09-13 10:27:52,164 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-13 10:27:52,164 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 66 transitions. [2024-09-13 10:27:52,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2024-09-13 10:27:52,164 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 10:27:52,164 INFO L216 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 10:27:52,164 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-09-13 10:27:52,165 INFO L399 AbstractCegarLoop]: === Iteration 4 === Targeting fibo1Err0ENSURES_VIOLATIONPOST_CONDITION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, fibo2Err0ENSURES_VIOLATIONPOST_CONDITION, fibo1Err0ENSURES_VIOLATIONPOST_CONDITION] === [2024-09-13 10:27:52,165 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 10:27:52,165 INFO L85 PathProgramCache]: Analyzing trace with hash 1688882568, now seen corresponding path program 1 times [2024-09-13 10:27:52,165 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 10:27:52,165 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [869297384] [2024-09-13 10:27:52,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 10:27:52,166 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 10:27:52,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:27:52,248 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-13 10:27:52,248 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 10:27:52,248 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [869297384] [2024-09-13 10:27:52,248 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [869297384] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-13 10:27:52,248 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-13 10:27:52,248 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-09-13 10:27:52,249 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [761579543] [2024-09-13 10:27:52,249 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-13 10:27:52,249 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-09-13 10:27:52,249 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 10:27:52,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-09-13 10:27:52,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-09-13 10:27:52,250 INFO L87 Difference]: Start difference. First operand 53 states and 66 transitions. Second operand has 6 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 2 states have call successors, (3), 2 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-13 10:27:52,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 10:27:52,320 INFO L93 Difference]: Finished difference Result 74 states and 97 transitions. [2024-09-13 10:27:52,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-09-13 10:27:52,321 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 2 states have call successors, (3), 2 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2024-09-13 10:27:52,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 10:27:52,322 INFO L225 Difference]: With dead ends: 74 [2024-09-13 10:27:52,323 INFO L226 Difference]: Without dead ends: 74 [2024-09-13 10:27:52,323 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-09-13 10:27:52,324 INFO L434 NwaCegarLoop]: 31 mSDtfsCounter, 25 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-13 10:27:52,324 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 99 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-13 10:27:52,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2024-09-13 10:27:52,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 62. [2024-09-13 10:27:52,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 40 states have (on average 1.3) internal successors, (52), 42 states have internal predecessors, (52), 13 states have call successors, (13), 6 states have call predecessors, (13), 6 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2024-09-13 10:27:52,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 78 transitions. [2024-09-13 10:27:52,334 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 78 transitions. Word has length 13 [2024-09-13 10:27:52,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 10:27:52,334 INFO L474 AbstractCegarLoop]: Abstraction has 62 states and 78 transitions. [2024-09-13 10:27:52,335 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 2 states have call successors, (3), 2 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-13 10:27:52,335 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 78 transitions. [2024-09-13 10:27:52,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2024-09-13 10:27:52,335 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 10:27:52,336 INFO L216 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 10:27:52,336 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-09-13 10:27:52,336 INFO L399 AbstractCegarLoop]: === Iteration 5 === Targeting fibo1Err0ENSURES_VIOLATIONPOST_CONDITION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, fibo2Err0ENSURES_VIOLATIONPOST_CONDITION, fibo1Err0ENSURES_VIOLATIONPOST_CONDITION] === [2024-09-13 10:27:52,337 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 10:27:52,337 INFO L85 PathProgramCache]: Analyzing trace with hash 815752847, now seen corresponding path program 1 times [2024-09-13 10:27:52,337 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 10:27:52,337 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2083810006] [2024-09-13 10:27:52,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 10:27:52,338 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 10:27:52,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:27:52,480 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 10:27:52,481 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 10:27:52,481 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2083810006] [2024-09-13 10:27:52,482 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2083810006] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 10:27:52,482 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [190519734] [2024-09-13 10:27:52,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 10:27:52,484 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 10:27:52,484 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 10:27:52,487 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 10:27:52,506 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 10:27:52,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:27:52,546 INFO L262 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-09-13 10:27:52,551 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 10:27:52,605 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 10:27:52,606 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 10:27:52,710 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 10:27:52,711 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [190519734] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 10:27:52,711 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-13 10:27:52,711 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 15 [2024-09-13 10:27:52,711 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1735889847] [2024-09-13 10:27:52,711 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-13 10:27:52,711 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-09-13 10:27:52,712 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 10:27:52,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-09-13 10:27:52,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2024-09-13 10:27:52,713 INFO L87 Difference]: Start difference. First operand 62 states and 78 transitions. Second operand has 16 states, 14 states have (on average 1.5) internal successors, (21), 9 states have internal predecessors, (21), 6 states have call successors, (6), 6 states have call predecessors, (6), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-13 10:27:53,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 10:27:53,036 INFO L93 Difference]: Finished difference Result 113 states and 133 transitions. [2024-09-13 10:27:53,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-09-13 10:27:53,037 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 14 states have (on average 1.5) internal successors, (21), 9 states have internal predecessors, (21), 6 states have call successors, (6), 6 states have call predecessors, (6), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2024-09-13 10:27:53,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 10:27:53,038 INFO L225 Difference]: With dead ends: 113 [2024-09-13 10:27:53,038 INFO L226 Difference]: Without dead ends: 113 [2024-09-13 10:27:53,039 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=89, Invalid=373, Unknown=0, NotChecked=0, Total=462 [2024-09-13 10:27:53,040 INFO L434 NwaCegarLoop]: 37 mSDtfsCounter, 88 mSDsluCounter, 272 mSDsCounter, 0 mSdLazyCounter, 252 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 309 SdHoareTripleChecker+Invalid, 286 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 252 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-13 10:27:53,040 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [89 Valid, 309 Invalid, 286 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 252 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-13 10:27:53,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2024-09-13 10:27:53,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 107. [2024-09-13 10:27:53,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 70 states have (on average 1.2428571428571429) internal successors, (87), 72 states have internal predecessors, (87), 23 states have call successors, (23), 11 states have call predecessors, (23), 11 states have return successors, (23), 23 states have call predecessors, (23), 23 states have call successors, (23) [2024-09-13 10:27:53,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 133 transitions. [2024-09-13 10:27:53,059 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 133 transitions. Word has length 14 [2024-09-13 10:27:53,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 10:27:53,060 INFO L474 AbstractCegarLoop]: Abstraction has 107 states and 133 transitions. [2024-09-13 10:27:53,060 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 14 states have (on average 1.5) internal successors, (21), 9 states have internal predecessors, (21), 6 states have call successors, (6), 6 states have call predecessors, (6), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-13 10:27:53,060 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 133 transitions. [2024-09-13 10:27:53,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2024-09-13 10:27:53,061 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 10:27:53,061 INFO L216 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1] [2024-09-13 10:27:53,075 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 10:27:53,261 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 10:27:53,262 INFO L399 AbstractCegarLoop]: === Iteration 6 === Targeting fibo2Err0ENSURES_VIOLATIONPOST_CONDITION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, fibo2Err0ENSURES_VIOLATIONPOST_CONDITION, fibo1Err0ENSURES_VIOLATIONPOST_CONDITION] === [2024-09-13 10:27:53,262 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 10:27:53,263 INFO L85 PathProgramCache]: Analyzing trace with hash 2123869197, now seen corresponding path program 1 times [2024-09-13 10:27:53,263 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 10:27:53,263 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1816845553] [2024-09-13 10:27:53,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 10:27:53,263 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 10:27:53,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:27:53,463 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-13 10:27:53,463 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 10:27:53,463 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1816845553] [2024-09-13 10:27:53,463 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1816845553] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 10:27:53,463 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1663183037] [2024-09-13 10:27:53,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 10:27:53,464 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 10:27:53,464 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 10:27:53,466 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 10:27:53,468 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 10:27:53,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:27:53,509 INFO L262 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-09-13 10:27:53,510 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 10:27:53,589 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-13 10:27:53,591 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 10:27:53,812 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-13 10:27:53,812 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1663183037] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 10:27:53,812 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-13 10:27:53,812 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 27 [2024-09-13 10:27:53,813 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1395408828] [2024-09-13 10:27:53,813 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-13 10:27:53,813 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-09-13 10:27:53,813 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 10:27:53,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-09-13 10:27:53,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=642, Unknown=0, NotChecked=0, Total=756 [2024-09-13 10:27:53,815 INFO L87 Difference]: Start difference. First operand 107 states and 133 transitions. Second operand has 28 states, 26 states have (on average 1.5) internal successors, (39), 15 states have internal predecessors, (39), 12 states have call successors, (12), 12 states have call predecessors, (12), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-13 10:27:54,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 10:27:54,371 INFO L93 Difference]: Finished difference Result 226 states and 265 transitions. [2024-09-13 10:27:54,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2024-09-13 10:27:54,372 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 26 states have (on average 1.5) internal successors, (39), 15 states have internal predecessors, (39), 12 states have call successors, (12), 12 states have call predecessors, (12), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2024-09-13 10:27:54,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 10:27:54,374 INFO L225 Difference]: With dead ends: 226 [2024-09-13 10:27:54,374 INFO L226 Difference]: Without dead ends: 226 [2024-09-13 10:27:54,374 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 406 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=303, Invalid=1503, Unknown=0, NotChecked=0, Total=1806 [2024-09-13 10:27:54,379 INFO L434 NwaCegarLoop]: 39 mSDtfsCounter, 194 mSDsluCounter, 374 mSDsCounter, 0 mSdLazyCounter, 414 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 195 SdHoareTripleChecker+Valid, 413 SdHoareTripleChecker+Invalid, 494 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 414 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-13 10:27:54,380 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [195 Valid, 413 Invalid, 494 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 414 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-13 10:27:54,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2024-09-13 10:27:54,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 215. [2024-09-13 10:27:54,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215 states, 142 states have (on average 1.204225352112676) internal successors, (171), 144 states have internal predecessors, (171), 47 states have call successors, (47), 23 states have call predecessors, (47), 23 states have return successors, (47), 47 states have call predecessors, (47), 47 states have call successors, (47) [2024-09-13 10:27:54,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 265 transitions. [2024-09-13 10:27:54,411 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 265 transitions. Word has length 26 [2024-09-13 10:27:54,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 10:27:54,411 INFO L474 AbstractCegarLoop]: Abstraction has 215 states and 265 transitions. [2024-09-13 10:27:54,411 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 26 states have (on average 1.5) internal successors, (39), 15 states have internal predecessors, (39), 12 states have call successors, (12), 12 states have call predecessors, (12), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-13 10:27:54,412 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 265 transitions. [2024-09-13 10:27:54,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2024-09-13 10:27:54,412 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 10:27:54,412 INFO L216 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1] [2024-09-13 10:27:54,430 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 10:27:54,613 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-09-13 10:27:54,614 INFO L399 AbstractCegarLoop]: === Iteration 7 === Targeting fibo1Err0ENSURES_VIOLATIONPOST_CONDITION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, fibo2Err0ENSURES_VIOLATIONPOST_CONDITION, fibo1Err0ENSURES_VIOLATIONPOST_CONDITION] === [2024-09-13 10:27:54,614 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 10:27:54,614 INFO L85 PathProgramCache]: Analyzing trace with hash -698684055, now seen corresponding path program 2 times [2024-09-13 10:27:54,614 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 10:27:54,614 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1587511761] [2024-09-13 10:27:54,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 10:27:54,615 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 10:27:54,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:27:54,836 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-13 10:27:54,836 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 10:27:54,836 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1587511761] [2024-09-13 10:27:54,837 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1587511761] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 10:27:54,837 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [165971262] [2024-09-13 10:27:54,837 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-13 10:27:54,837 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 10:27:54,837 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 10:27:54,839 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 10:27:54,840 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 10:27:54,878 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-09-13 10:27:54,878 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 10:27:54,880 INFO L262 TraceCheckSpWp]: Trace formula consists of 35 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-09-13 10:27:54,882 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 10:27:54,946 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2024-09-13 10:27:54,949 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-13 10:27:54,949 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [165971262] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-13 10:27:54,949 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-09-13 10:27:54,949 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [16] total 20 [2024-09-13 10:27:54,949 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1512747720] [2024-09-13 10:27:54,950 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-13 10:27:54,950 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-13 10:27:54,950 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 10:27:54,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-13 10:27:54,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=324, Unknown=0, NotChecked=0, Total=380 [2024-09-13 10:27:54,951 INFO L87 Difference]: Start difference. First operand 215 states and 265 transitions. Second operand has 5 states, 4 states have (on average 2.75) internal successors, (11), 5 states have internal predecessors, (11), 1 states have call successors, (3), 1 states have call predecessors, (3), 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 L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 10:27:55,000 INFO L93 Difference]: Finished difference Result 222 states and 293 transitions. [2024-09-13 10:27:55,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-13 10:27:55,000 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 5 states have internal predecessors, (11), 1 states have call successors, (3), 1 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2024-09-13 10:27:55,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 10:27:55,002 INFO L225 Difference]: With dead ends: 222 [2024-09-13 10:27:55,002 INFO L226 Difference]: Without dead ends: 222 [2024-09-13 10:27:55,003 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=56, Invalid=324, Unknown=0, NotChecked=0, Total=380 [2024-09-13 10:27:55,004 INFO L434 NwaCegarLoop]: 24 mSDtfsCounter, 6 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-13 10:27:55,004 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 70 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-13 10:27:55,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2024-09-13 10:27:55,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 217. [2024-09-13 10:27:55,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 217 states, 144 states have (on average 1.2013888888888888) internal successors, (173), 146 states have internal predecessors, (173), 47 states have call successors, (47), 23 states have call predecessors, (47), 23 states have return successors, (47), 47 states have call predecessors, (47), 47 states have call successors, (47) [2024-09-13 10:27:55,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 267 transitions. [2024-09-13 10:27:55,027 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 267 transitions. Word has length 30 [2024-09-13 10:27:55,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 10:27:55,027 INFO L474 AbstractCegarLoop]: Abstraction has 217 states and 267 transitions. [2024-09-13 10:27:55,027 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 5 states have internal predecessors, (11), 1 states have call successors, (3), 1 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-13 10:27:55,028 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 267 transitions. [2024-09-13 10:27:55,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2024-09-13 10:27:55,028 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 10:27:55,028 INFO L216 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1] [2024-09-13 10:27:55,043 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 10:27:55,229 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2024-09-13 10:27:55,229 INFO L399 AbstractCegarLoop]: === Iteration 8 === Targeting fibo2Err0ENSURES_VIOLATIONPOST_CONDITION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, fibo2Err0ENSURES_VIOLATIONPOST_CONDITION, fibo1Err0ENSURES_VIOLATIONPOST_CONDITION] === [2024-09-13 10:27:55,230 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 10:27:55,230 INFO L85 PathProgramCache]: Analyzing trace with hash 755241594, now seen corresponding path program 2 times [2024-09-13 10:27:55,230 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 10:27:55,230 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1078404134] [2024-09-13 10:27:55,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 10:27:55,230 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 10:27:55,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:27:55,665 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 39 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-13 10:27:55,666 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 10:27:55,666 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1078404134] [2024-09-13 10:27:55,666 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1078404134] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 10:27:55,666 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1543553839] [2024-09-13 10:27:55,666 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-13 10:27:55,666 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 10:27:55,667 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 10:27:55,671 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 10:27:55,673 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 10:27:55,715 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-09-13 10:27:55,715 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 10:27:55,716 INFO L262 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-09-13 10:27:55,718 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 10:27:55,742 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2024-09-13 10:27:55,742 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-13 10:27:55,743 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1543553839] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-13 10:27:55,743 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-09-13 10:27:55,743 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [19] total 21 [2024-09-13 10:27:55,743 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1553087192] [2024-09-13 10:27:55,743 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-13 10:27:55,743 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-09-13 10:27:55,743 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 10:27:55,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-09-13 10:27:55,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=387, Unknown=0, NotChecked=0, Total=462 [2024-09-13 10:27:55,744 INFO L87 Difference]: Start difference. First operand 217 states and 267 transitions. Second operand has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (3), 1 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-13 10:27:55,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 10:27:55,780 INFO L93 Difference]: Finished difference Result 224 states and 283 transitions. [2024-09-13 10:27:55,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-09-13 10:27:55,780 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (3), 1 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2024-09-13 10:27:55,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 10:27:55,782 INFO L225 Difference]: With dead ends: 224 [2024-09-13 10:27:55,782 INFO L226 Difference]: Without dead ends: 224 [2024-09-13 10:27:55,782 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=75, Invalid=387, Unknown=0, NotChecked=0, Total=462 [2024-09-13 10:27:55,783 INFO L434 NwaCegarLoop]: 24 mSDtfsCounter, 6 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-13 10:27:55,783 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 59 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-13 10:27:55,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2024-09-13 10:27:55,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 219. [2024-09-13 10:27:55,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 219 states, 146 states have (on average 1.1986301369863013) internal successors, (175), 148 states have internal predecessors, (175), 47 states have call successors, (47), 23 states have call predecessors, (47), 23 states have return successors, (47), 47 states have call predecessors, (47), 47 states have call successors, (47) [2024-09-13 10:27:55,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 269 transitions. [2024-09-13 10:27:55,800 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 269 transitions. Word has length 34 [2024-09-13 10:27:55,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 10:27:55,801 INFO L474 AbstractCegarLoop]: Abstraction has 219 states and 269 transitions. [2024-09-13 10:27:55,801 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (3), 1 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-13 10:27:55,801 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 269 transitions. [2024-09-13 10:27:55,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2024-09-13 10:27:55,802 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 10:27:55,802 INFO L216 NwaCegarLoop]: trace histogram [5, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 10:27:55,818 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-09-13 10:27:56,002 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 10:27:56,002 INFO L399 AbstractCegarLoop]: === Iteration 9 === Targeting fibo1Err0ENSURES_VIOLATIONPOST_CONDITION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, fibo2Err0ENSURES_VIOLATIONPOST_CONDITION, fibo1Err0ENSURES_VIOLATIONPOST_CONDITION] === [2024-09-13 10:27:56,003 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 10:27:56,003 INFO L85 PathProgramCache]: Analyzing trace with hash 635903209, now seen corresponding path program 1 times [2024-09-13 10:27:56,003 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 10:27:56,003 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [477532420] [2024-09-13 10:27:56,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 10:27:56,003 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 10:27:56,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:27:56,199 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2024-09-13 10:27:56,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:27:56,236 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 9 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-13 10:27:56,237 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 10:27:56,237 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [477532420] [2024-09-13 10:27:56,237 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [477532420] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 10:27:56,237 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1869532846] [2024-09-13 10:27:56,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 10:27:56,238 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 10:27:56,238 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 10:27:56,239 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 10:27:56,241 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 10:27:56,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:27:56,288 INFO L262 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-09-13 10:27:56,289 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 10:27:56,357 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 9 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-13 10:27:56,357 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 10:27:56,555 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 9 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-13 10:27:56,556 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1869532846] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 10:27:56,557 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-13 10:27:56,557 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 19 [2024-09-13 10:27:56,557 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [326730744] [2024-09-13 10:27:56,557 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-13 10:27:56,558 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-09-13 10:27:56,558 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 10:27:56,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-09-13 10:27:56,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2024-09-13 10:27:56,559 INFO L87 Difference]: Start difference. First operand 219 states and 269 transitions. Second operand has 19 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 12 states have internal predecessors, (33), 8 states have call successors, (8), 8 states have call predecessors, (8), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-13 10:27:56,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 10:27:56,868 INFO L93 Difference]: Finished difference Result 238 states and 297 transitions. [2024-09-13 10:27:56,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-09-13 10:27:56,868 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 12 states have internal predecessors, (33), 8 states have call successors, (8), 8 states have call predecessors, (8), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 36 [2024-09-13 10:27:56,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 10:27:56,870 INFO L225 Difference]: With dead ends: 238 [2024-09-13 10:27:56,870 INFO L226 Difference]: Without dead ends: 238 [2024-09-13 10:27:56,871 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 56 SyntacticMatches, 14 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=105, Invalid=495, Unknown=0, NotChecked=0, Total=600 [2024-09-13 10:27:56,871 INFO L434 NwaCegarLoop]: 34 mSDtfsCounter, 97 mSDsluCounter, 213 mSDsCounter, 0 mSdLazyCounter, 389 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 247 SdHoareTripleChecker+Invalid, 423 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 389 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-13 10:27:56,871 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [100 Valid, 247 Invalid, 423 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 389 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-13 10:27:56,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2024-09-13 10:27:56,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 229. [2024-09-13 10:27:56,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229 states, 152 states have (on average 1.1973684210526316) internal successors, (182), 155 states have internal predecessors, (182), 49 states have call successors, (49), 24 states have call predecessors, (49), 25 states have return successors, (54), 49 states have call predecessors, (54), 49 states have call successors, (54) [2024-09-13 10:27:56,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 285 transitions. [2024-09-13 10:27:56,882 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 285 transitions. Word has length 36 [2024-09-13 10:27:56,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 10:27:56,882 INFO L474 AbstractCegarLoop]: Abstraction has 229 states and 285 transitions. [2024-09-13 10:27:56,882 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 12 states have internal predecessors, (33), 8 states have call successors, (8), 8 states have call predecessors, (8), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-13 10:27:56,882 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 285 transitions. [2024-09-13 10:27:56,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2024-09-13 10:27:56,883 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 10:27:56,883 INFO L216 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 10:27:56,900 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 10:27:57,086 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 10:27:57,087 INFO L399 AbstractCegarLoop]: === Iteration 10 === Targeting fibo2Err0ENSURES_VIOLATIONPOST_CONDITION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, fibo2Err0ENSURES_VIOLATIONPOST_CONDITION, fibo1Err0ENSURES_VIOLATIONPOST_CONDITION] === [2024-09-13 10:27:57,088 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 10:27:57,088 INFO L85 PathProgramCache]: Analyzing trace with hash -346895470, now seen corresponding path program 1 times [2024-09-13 10:27:57,088 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 10:27:57,088 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1658130392] [2024-09-13 10:27:57,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 10:27:57,088 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 10:27:57,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:27:57,153 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2024-09-13 10:27:57,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:27:57,156 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2024-09-13 10:27:57,157 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 10:27:57,157 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1658130392] [2024-09-13 10:27:57,157 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1658130392] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-13 10:27:57,157 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-13 10:27:57,157 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-09-13 10:27:57,157 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1099097046] [2024-09-13 10:27:57,158 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-13 10:27:57,158 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-09-13 10:27:57,158 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 10:27:57,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-09-13 10:27:57,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-09-13 10:27:57,159 INFO L87 Difference]: Start difference. First operand 229 states and 285 transitions. Second operand has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 4 states have internal predecessors, (13), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-13 10:27:57,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 10:27:57,192 INFO L93 Difference]: Finished difference Result 233 states and 298 transitions. [2024-09-13 10:27:57,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-09-13 10:27:57,194 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 4 states have internal predecessors, (13), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 40 [2024-09-13 10:27:57,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 10:27:57,195 INFO L225 Difference]: With dead ends: 233 [2024-09-13 10:27:57,196 INFO L226 Difference]: Without dead ends: 233 [2024-09-13 10:27:57,196 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 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 10:27:57,196 INFO L434 NwaCegarLoop]: 25 mSDtfsCounter, 7 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-13 10:27:57,197 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 60 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-13 10:27:57,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2024-09-13 10:27:57,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 229. [2024-09-13 10:27:57,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229 states, 152 states have (on average 1.1973684210526316) internal successors, (182), 155 states have internal predecessors, (182), 49 states have call successors, (49), 24 states have call predecessors, (49), 25 states have return successors, (54), 49 states have call predecessors, (54), 49 states have call successors, (54) [2024-09-13 10:27:57,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 285 transitions. [2024-09-13 10:27:57,216 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 285 transitions. Word has length 40 [2024-09-13 10:27:57,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 10:27:57,217 INFO L474 AbstractCegarLoop]: Abstraction has 229 states and 285 transitions. [2024-09-13 10:27:57,217 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 4 states have internal predecessors, (13), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-13 10:27:57,217 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 285 transitions. [2024-09-13 10:27:57,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2024-09-13 10:27:57,220 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 10:27:57,220 INFO L216 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 10:27:57,220 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-09-13 10:27:57,221 INFO L399 AbstractCegarLoop]: === Iteration 11 === Targeting fibo1Err0ENSURES_VIOLATIONPOST_CONDITION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, fibo2Err0ENSURES_VIOLATIONPOST_CONDITION, fibo1Err0ENSURES_VIOLATIONPOST_CONDITION] === [2024-09-13 10:27:57,221 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 10:27:57,221 INFO L85 PathProgramCache]: Analyzing trace with hash 557955997, now seen corresponding path program 1 times [2024-09-13 10:27:57,221 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 10:27:57,221 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1668427855] [2024-09-13 10:27:57,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 10:27:57,221 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 10:27:57,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:27:57,498 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2024-09-13 10:27:57,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:27:57,509 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2024-09-13 10:27:57,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:27:57,512 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 64 proven. 20 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-13 10:27:57,513 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 10:27:57,513 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1668427855] [2024-09-13 10:27:57,513 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1668427855] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 10:27:57,513 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [715658502] [2024-09-13 10:27:57,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 10:27:57,513 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 10:27:57,517 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 10:27:57,522 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 10:27:57,538 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 10:27:57,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:27:57,580 INFO L262 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-09-13 10:27:57,582 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 10:27:57,667 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 84 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-13 10:27:57,668 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-13 10:27:57,668 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [715658502] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-13 10:27:57,668 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-09-13 10:27:57,669 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [20] total 22 [2024-09-13 10:27:57,669 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [368194977] [2024-09-13 10:27:57,669 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-13 10:27:57,669 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-09-13 10:27:57,671 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 10:27:57,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-09-13 10:27:57,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=385, Unknown=0, NotChecked=0, Total=462 [2024-09-13 10:27:57,672 INFO L87 Difference]: Start difference. First operand 229 states and 285 transitions. Second operand has 21 states, 20 states have (on average 1.8) internal successors, (36), 11 states have internal predecessors, (36), 10 states have call successors, (11), 10 states have call predecessors, (11), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-09-13 10:27:58,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 10:27:58,008 INFO L93 Difference]: Finished difference Result 277 states and 347 transitions. [2024-09-13 10:27:58,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-09-13 10:27:58,009 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 1.8) internal successors, (36), 11 states have internal predecessors, (36), 10 states have call successors, (11), 10 states have call predecessors, (11), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 51 [2024-09-13 10:27:58,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 10:27:58,011 INFO L225 Difference]: With dead ends: 277 [2024-09-13 10:27:58,011 INFO L226 Difference]: Without dead ends: 273 [2024-09-13 10:27:58,013 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=172, Invalid=820, Unknown=0, NotChecked=0, Total=992 [2024-09-13 10:27:58,013 INFO L434 NwaCegarLoop]: 18 mSDtfsCounter, 154 mSDsluCounter, 118 mSDsCounter, 0 mSdLazyCounter, 376 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 155 SdHoareTripleChecker+Valid, 136 SdHoareTripleChecker+Invalid, 458 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 376 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-13 10:27:58,014 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [155 Valid, 136 Invalid, 458 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 376 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-13 10:27:58,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 273 states. [2024-09-13 10:27:58,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 273 to 259. [2024-09-13 10:27:58,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 259 states, 174 states have (on average 1.206896551724138) internal successors, (210), 177 states have internal predecessors, (210), 53 states have call successors, (53), 28 states have call predecessors, (53), 29 states have return successors, (57), 53 states have call predecessors, (57), 53 states have call successors, (57) [2024-09-13 10:27:58,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 320 transitions. [2024-09-13 10:27:58,027 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 320 transitions. Word has length 51 [2024-09-13 10:27:58,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 10:27:58,028 INFO L474 AbstractCegarLoop]: Abstraction has 259 states and 320 transitions. [2024-09-13 10:27:58,028 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 1.8) internal successors, (36), 11 states have internal predecessors, (36), 10 states have call successors, (11), 10 states have call predecessors, (11), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-09-13 10:27:58,028 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 320 transitions. [2024-09-13 10:27:58,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2024-09-13 10:27:58,030 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 10:27:58,031 INFO L216 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 10:27:58,048 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-09-13 10:27:58,235 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2024-09-13 10:27:58,236 INFO L399 AbstractCegarLoop]: === Iteration 12 === Targeting fibo1Err0ENSURES_VIOLATIONPOST_CONDITION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, fibo2Err0ENSURES_VIOLATIONPOST_CONDITION, fibo1Err0ENSURES_VIOLATIONPOST_CONDITION] === [2024-09-13 10:27:58,236 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 10:27:58,236 INFO L85 PathProgramCache]: Analyzing trace with hash -671606166, now seen corresponding path program 2 times [2024-09-13 10:27:58,236 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 10:27:58,237 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2119480724] [2024-09-13 10:27:58,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 10:27:58,237 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 10:27:58,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-09-13 10:27:58,248 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-09-13 10:27:58,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-09-13 10:27:58,276 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-09-13 10:27:58,277 INFO L326 BasicCegarLoop]: Counterexample is feasible [2024-09-13 10:27:58,278 INFO L785 garLoopResultBuilder]: Registering result UNSAFE for location fibo1Err0ENSURES_VIOLATIONPOST_CONDITION (2 of 3 remaining) [2024-09-13 10:27:58,279 INFO L785 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 3 remaining) [2024-09-13 10:27:58,280 INFO L785 garLoopResultBuilder]: Registering result UNKNOWN for location fibo2Err0ENSURES_VIOLATIONPOST_CONDITION (0 of 3 remaining) [2024-09-13 10:27:58,280 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-09-13 10:27:58,282 INFO L408 BasicCegarLoop]: Path program histogram: [2, 2, 2, 1, 1, 1, 1, 1, 1] [2024-09-13 10:27:58,304 INFO L165 ceAbstractionStarter]: Computing trace abstraction results [2024-09-13 10:27:58,306 INFO L201 PluginConnector]: Adding new model witness-2.1.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 13.09 10:27:58 BoogieIcfgContainer [2024-09-13 10:27:58,306 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2024-09-13 10:27:58,307 INFO L158 Benchmark]: Toolchain (without parser) took 7980.79ms. Allocated memory was 159.4MB in the beginning and 192.9MB in the end (delta: 33.6MB). Free memory was 88.9MB in the beginning and 130.2MB in the end (delta: -41.2MB). There was no memory consumed. Max. memory is 16.1GB. [2024-09-13 10:27:58,307 INFO L158 Benchmark]: CDTParser took 0.13ms. Allocated memory is still 121.6MB. Free memory is still 82.7MB. There was no memory consumed. Max. memory is 16.1GB. [2024-09-13 10:27:58,307 INFO L158 Benchmark]: Witness Parser took 0.17ms. Allocated memory is still 159.4MB. Free memory is still 90.6MB. There was no memory consumed. Max. memory is 16.1GB. [2024-09-13 10:27:58,307 INFO L158 Benchmark]: CACSL2BoogieTranslator took 299.23ms. Allocated memory is still 159.4MB. Free memory was 88.5MB in the beginning and 75.5MB in the end (delta: 13.1MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2024-09-13 10:27:58,308 INFO L158 Benchmark]: Boogie Procedure Inliner took 28.58ms. Allocated memory is still 159.4MB. Free memory was 75.5MB in the beginning and 73.9MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-09-13 10:27:58,308 INFO L158 Benchmark]: Boogie Preprocessor took 35.10ms. Allocated memory is still 159.4MB. Free memory was 73.9MB in the beginning and 72.3MB in the end (delta: 1.5MB). There was no memory consumed. Max. memory is 16.1GB. [2024-09-13 10:27:58,308 INFO L158 Benchmark]: RCFGBuilder took 399.43ms. Allocated memory is still 159.4MB. Free memory was 72.3MB in the beginning and 126.6MB in the end (delta: -54.3MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. [2024-09-13 10:27:58,309 INFO L158 Benchmark]: TraceAbstraction took 7209.49ms. Allocated memory was 159.4MB in the beginning and 192.9MB in the end (delta: 33.6MB). Free memory was 125.8MB in the beginning and 130.2MB in the end (delta: -4.3MB). Peak memory consumption was 30.9MB. Max. memory is 16.1GB. [2024-09-13 10:27:58,310 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.13ms. Allocated memory is still 121.6MB. Free memory is still 82.7MB. There was no memory consumed. Max. memory is 16.1GB. * Witness Parser took 0.17ms. Allocated memory is still 159.4MB. Free memory is still 90.6MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 299.23ms. Allocated memory is still 159.4MB. Free memory was 88.5MB in the beginning and 75.5MB in the end (delta: 13.1MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 28.58ms. Allocated memory is still 159.4MB. Free memory was 75.5MB in the beginning and 73.9MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 35.10ms. Allocated memory is still 159.4MB. Free memory was 73.9MB in the beginning and 72.3MB in the end (delta: 1.5MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 399.43ms. Allocated memory is still 159.4MB. Free memory was 72.3MB in the beginning and 126.6MB in the end (delta: -54.3MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. * TraceAbstraction took 7209.49ms. Allocated memory was 159.4MB in the beginning and 192.9MB in the end (delta: 33.6MB). Free memory was 125.8MB in the beginning and 130.2MB in the end (delta: -4.3MB). Peak memory consumption was 30.9MB. 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 - CounterExampleResult [Line: 9]: procedure postcondition can be violated procedure postcondition can be violated We found a FailurePath: [L38] int x = 8; VAL [x=8] [L39] CALL fibo1(x) VAL [\old(n)=8] [L10] COND FALSE !(n < 1) VAL [\old(n)=8, n=8] [L12] COND FALSE !(n == 1) VAL [\old(n)=8, n=8] [L15] CALL, EXPR fibo2(n-1) VAL [\old(n)=7] [L20] COND FALSE !(n < 1) VAL [\old(n)=7, n=7] [L22] COND FALSE !(n == 1) VAL [\old(n)=7, n=7] [L25] CALL fibo1(n-1) VAL [\old(n)=6] [L10] COND FALSE !(n < 1) VAL [\old(n)=6, n=6] [L12] COND FALSE !(n == 1) VAL [\old(n)=6, n=6] [L15] CALL, EXPR fibo2(n-1) VAL [\old(n)=5] [L20] COND FALSE !(n < 1) VAL [\old(n)=5, n=5] [L22] COND FALSE !(n == 1) VAL [\old(n)=5, n=5] [L25] CALL fibo1(n-1) VAL [\old(n)=4] [L10] COND FALSE !(n < 1) VAL [\old(n)=4, n=4] [L12] COND FALSE !(n == 1) VAL [\old(n)=4, n=4] [L15] CALL, EXPR fibo2(n-1) VAL [\old(n)=3] [L20] COND FALSE !(n < 1) VAL [\old(n)=3, n=3] [L22] COND FALSE !(n == 1) VAL [\old(n)=3, n=3] [L25] CALL fibo1(n-1) VAL [\old(n)=2] [L10] COND FALSE !(n < 1) VAL [\old(n)=2, n=2] [L12] COND FALSE !(n == 1) VAL [\old(n)=2, n=2] [L15] CALL, EXPR fibo2(n-1) VAL [\old(n)=1] [L20] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L22] COND TRUE n == 1 [L23] return 1; VAL [\old(n)=1, \result=1] [L15] RET, EXPR fibo2(n-1) VAL [\old(n)=2, n=2] [L15] CALL, EXPR fibo2(n-2) VAL [\old(n)=0] [L20] COND TRUE n < 1 [L21] return 0; VAL [\old(n)=0, \result=0] [L15] RET, EXPR fibo2(n-2) VAL [\old(n)=2, n=2] [L15] return fibo2(n-1) + fibo2(n-2); - UnprovableResult [Line: 41]: Unable to prove that a call to reach_error is unreachable Unable to prove that a call to reach_error is unreachable Reason: Not analyzed. - UnprovableResult [Line: 19]: Unable to prove that procedure postcondition always holds Unable to prove that procedure postcondition always holds Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 28 locations, 3 error locations. Started 1 CEGAR loops. OverallTime: 7.1s, OverallIterations: 12, TraceHistogramMax: 6, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 2.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 670 SdHoareTripleChecker+Valid, 1.4s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 647 mSDsluCounter, 1736 SdHoareTripleChecker+Invalid, 1.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 1421 mSDsCounter, 257 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 1773 IncrementalHoareTripleChecker+Invalid, 2030 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 257 mSolverCounterUnsat, 315 mSDtfsCounter, 1773 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 426 GetRequests, 237 SyntacticMatches, 14 SemanticMatches, 175 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 987 ImplicationChecksByTransitivity, 1.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=259occurred in iteration=11, InterpolantAutomatonStates: 122, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 11 MinimizatonAttempts, 79 StatesRemovedByMinimization, 11 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 2.8s InterpolantComputationTime, 502 NumberOfCodeBlocks, 454 NumberOfCodeBlocksAsserted, 18 NumberOfCheckSat, 515 ConstructedInterpolants, 0 QuantifiedInterpolants, 1247 SizeOfPredicates, 24 NumberOfNonLiveVariables, 438 ConjunctsInSsa, 72 ConjunctsInUnsatCore, 20 InterpolantComputations, 8 PerfectInterpolantSequences, 356/589 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 RESULT: Ultimate proved your program to be incorrect! [2024-09-13 10:27:58,334 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 Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE