./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/recursive-simple/fibo_5-1.c --full-output --witness-type correctness_witness --validate ../results/automizer-verification-files/SV-COMP24_unreach-call/fibo_5-1.yml/witness-2.1.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version de325976 Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/certificate-witnesses-artifact/automizer/data/config -Xmx15G -Xms4m -jar /storage/repos/certificate-witnesses-artifact/automizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/certificate-witnesses-artifact/automizer/data -tc /storage/repos/certificate-witnesses-artifact/automizer/config/AutomizerReachWitnessValidation.xml -i ../sv-benchmarks/c/recursive-simple/fibo_5-1.c ../results/automizer-verification-files/SV-COMP24_unreach-call/fibo_5-1.yml/witness-2.1.yml -s /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.positions.where.we.compute.the.hoare.annotation None --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.dk.referee-eval-de32597-m [2024-09-17 19:52:34,421 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-09-17 19:52:34,494 INFO L114 SettingsManager]: Loading settings from /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-09-17 19:52:34,498 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-09-17 19:52:34,498 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-09-17 19:52:34,519 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-09-17 19:52:34,520 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-09-17 19:52:34,520 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-09-17 19:52:34,521 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-09-17 19:52:34,521 INFO L153 SettingsManager]: * Use memory slicer=true [2024-09-17 19:52:34,522 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-09-17 19:52:34,522 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-09-17 19:52:34,523 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-09-17 19:52:34,523 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-09-17 19:52:34,523 INFO L153 SettingsManager]: * Use SBE=true [2024-09-17 19:52:34,524 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-09-17 19:52:34,524 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-09-17 19:52:34,525 INFO L153 SettingsManager]: * sizeof long=4 [2024-09-17 19:52:34,525 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-09-17 19:52:34,529 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-09-17 19:52:34,529 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-09-17 19:52:34,531 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-09-17 19:52:34,531 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-09-17 19:52:34,532 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-09-17 19:52:34,532 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-09-17 19:52:34,532 INFO L153 SettingsManager]: * sizeof long double=12 [2024-09-17 19:52:34,532 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-09-17 19:52:34,532 INFO L153 SettingsManager]: * Use constant arrays=true [2024-09-17 19:52:34,533 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-09-17 19:52:34,533 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-09-17 19:52:34,533 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-09-17 19:52:34,533 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-09-17 19:52:34,534 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-17 19:52:34,534 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-09-17 19:52:34,536 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-09-17 19:52:34,536 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-09-17 19:52:34,536 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-09-17 19:52:34,537 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-09-17 19:52:34,537 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-09-17 19:52:34,537 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-09-17 19:52:34,537 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-09-17 19:52:34,538 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-09-17 19:52:34,538 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Positions where we compute the Hoare Annotation -> None [2024-09-17 19:52:34,775 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-09-17 19:52:34,797 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-09-17 19:52:34,801 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-09-17 19:52:34,802 INFO L270 PluginConnector]: Initializing CDTParser... [2024-09-17 19:52:34,803 INFO L274 PluginConnector]: CDTParser initialized [2024-09-17 19:52:34,804 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/certificate-witnesses-artifact/automizer/../sv-benchmarks/c/recursive-simple/fibo_5-1.c [2024-09-17 19:52:36,218 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-09-17 19:52:36,392 INFO L384 CDTParser]: Found 1 translation units. [2024-09-17 19:52:36,393 INFO L180 CDTParser]: Scanning /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/recursive-simple/fibo_5-1.c [2024-09-17 19:52:36,399 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/certificate-witnesses-artifact/automizer/data/0c3f5f301/57b8a791a0134af7a60e05ff0a7bf614/FLAGfeaf3a389 [2024-09-17 19:52:36,803 INFO L435 CDTParser]: Successfully deleted /storage/repos/certificate-witnesses-artifact/automizer/data/0c3f5f301/57b8a791a0134af7a60e05ff0a7bf614 [2024-09-17 19:52:36,806 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-09-17 19:52:36,807 INFO L274 PluginConnector]: Witness Parser initialized [2024-09-17 19:52:36,807 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/certificate-witnesses-artifact/automizer/../results/automizer-verification-files/SV-COMP24_unreach-call/fibo_5-1.yml/witness-2.1.yml [2024-09-17 19:52:36,855 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-09-17 19:52:36,856 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-09-17 19:52:36,858 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-09-17 19:52:36,858 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-09-17 19:52:36,863 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-09-17 19:52:36,863 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.09 07:52:36" (1/2) ... [2024-09-17 19:52:36,864 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5002efb6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 07:52:36, skipping insertion in model container [2024-09-17 19:52:36,864 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.09 07:52:36" (1/2) ... [2024-09-17 19:52:36,866 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@3a8da217 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 07:52:36, skipping insertion in model container [2024-09-17 19:52:36,866 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness-2.1.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 17.09 07:52:36" (2/2) ... [2024-09-17 19:52:36,866 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5002efb6 and model type witness-2.1.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 17.09 07:52:36, skipping insertion in model container [2024-09-17 19:52:36,866 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness-2.1.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 17.09 07:52:36" (2/2) ... [2024-09-17 19:52:36,871 INFO L93 nessWitnessExtractor]: Found the following entries in the witness: [2024-09-17 19:52:36,872 INFO L1541 ArrayList]: Function contract at [L7]: requires null, ensures (((((((((\result == 3) && (4 == \old(n))) || ((2 == \old(n)) && (\result == 1))) || (\old(n) < 1)) || ((3 == \old(n)) && (\result == 2))) || (5 < \old(n))) || ((\result == 1) && (1 == \old(n)))) || ((\result == 5) && (5 == \old(n)))) && ((0 < \old(n)) || (\result == 0))) [2024-09-17 19:52:36,886 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-09-17 19:52:37,032 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/recursive-simple/fibo_5-1.c[740,753] [2024-09-17 19:52:37,036 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-17 19:52:37,050 INFO L200 MainTranslator]: Completed pre-run Start Parsing Global [2024-09-17 19:52:37,097 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/recursive-simple/fibo_5-1.c[740,753] [2024-09-17 19:52:37,099 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-17 19:52:37,115 INFO L204 MainTranslator]: Completed translation [2024-09-17 19:52:37,116 INFO L201 PluginConnector]: Adding new model witness-2.1.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 17.09 07:52:37 WrapperNode [2024-09-17 19:52:37,116 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-09-17 19:52:37,117 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-09-17 19:52:37,117 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-09-17 19:52:37,118 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-09-17 19:52:37,124 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 17.09 07:52:37" (1/1) ... [2024-09-17 19:52:37,131 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 17.09 07:52:37" (1/1) ... [2024-09-17 19:52:37,145 INFO L138 Inliner]: procedures = 13, calls = 10, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 20 [2024-09-17 19:52:37,146 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-09-17 19:52:37,147 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-09-17 19:52:37,147 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-09-17 19:52:37,147 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-09-17 19:52:37,156 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 17.09 07:52:37" (1/1) ... [2024-09-17 19:52:37,157 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 17.09 07:52:37" (1/1) ... [2024-09-17 19:52:37,159 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 17.09 07:52:37" (1/1) ... [2024-09-17 19:52:37,168 WARN L109 MemorySlicer]: Omit memory slicing because it failed with the following exception: Unsupported: Procedure fibo is not part of the Ultimate memory model but has specification other that is not a ModifiesSpecification [2024-09-17 19:52:37,169 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 17.09 07:52:37" (1/1) ... [2024-09-17 19:52:37,169 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 17.09 07:52:37" (1/1) ... [2024-09-17 19:52:37,175 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 17.09 07:52:37" (1/1) ... [2024-09-17 19:52:37,177 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 17.09 07:52:37" (1/1) ... [2024-09-17 19:52:37,178 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 17.09 07:52:37" (1/1) ... [2024-09-17 19:52:37,179 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 17.09 07:52:37" (1/1) ... [2024-09-17 19:52:37,182 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-09-17 19:52:37,186 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-09-17 19:52:37,186 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-09-17 19:52:37,186 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-09-17 19:52:37,187 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 17.09 07:52:37" (1/1) ... [2024-09-17 19:52:37,192 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-17 19:52:37,200 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 19:52:37,214 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) [2024-09-17 19:52:37,232 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 [2024-09-17 19:52:37,291 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-09-17 19:52:37,291 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-09-17 19:52:37,292 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-09-17 19:52:37,292 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2024-09-17 19:52:37,292 INFO L130 BoogieDeclarations]: Found specification of procedure fibo [2024-09-17 19:52:37,292 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo [2024-09-17 19:52:37,340 INFO L242 CfgBuilder]: Building ICFG [2024-09-17 19:52:37,343 INFO L268 CfgBuilder]: Building CFG for each procedure with an implementation [2024-09-17 19:52:37,455 INFO L? ?]: Removed 9 outVars from TransFormulas that were not future-live. [2024-09-17 19:52:37,455 INFO L291 CfgBuilder]: Performing block encoding [2024-09-17 19:52:37,477 INFO L313 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-09-17 19:52:37,478 INFO L318 CfgBuilder]: Removed 0 assume(true) statements. [2024-09-17 19:52:37,478 INFO L201 PluginConnector]: Adding new model witness-2.1.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.09 07:52:37 BoogieIcfgContainer [2024-09-17 19:52:37,478 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-09-17 19:52:37,480 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-09-17 19:52:37,481 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-09-17 19:52:37,484 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-09-17 19:52:37,484 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.09 07:52:36" (1/4) ... [2024-09-17 19:52:37,485 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3a00ef1a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.09 07:52:37, skipping insertion in model container [2024-09-17 19:52:37,487 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness-2.1.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 17.09 07:52:36" (2/4) ... [2024-09-17 19:52:37,487 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3a00ef1a and model type witness-2.1.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 17.09 07:52:37, skipping insertion in model container [2024-09-17 19:52:37,487 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 17.09 07:52:37" (3/4) ... [2024-09-17 19:52:37,487 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3a00ef1a and model type witness-2.1.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 17.09 07:52:37, skipping insertion in model container [2024-09-17 19:52:37,487 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness-2.1.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.09 07:52:37" (4/4) ... [2024-09-17 19:52:37,492 INFO L112 eAbstractionObserver]: Analyzing ICFG fibo_5-1.c [2024-09-17 19:52:37,507 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-09-17 19:52:37,508 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2024-09-17 19:52:37,553 INFO L335 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-09-17 19:52:37,562 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;@56de921f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-09-17 19:52:37,562 INFO L337 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2024-09-17 19:52:37,566 INFO L276 IsEmpty]: Start isEmpty. Operand has 18 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 13 states have internal predecessors, (16), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-09-17 19:52:37,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2024-09-17 19:52:37,573 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 19:52:37,573 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2024-09-17 19:52:37,574 INFO L399 AbstractCegarLoop]: === Iteration 1 === Targeting fiboErr0ENSURES_VIOLATIONPOST_CONDITION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, fiboErr0ENSURES_VIOLATIONPOST_CONDITION] === [2024-09-17 19:52:37,580 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 19:52:37,580 INFO L85 PathProgramCache]: Analyzing trace with hash 65647554, now seen corresponding path program 1 times [2024-09-17 19:52:37,589 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 19:52:37,590 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [202338506] [2024-09-17 19:52:37,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 19:52:37,591 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 19:52:37,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:52:37,821 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-17 19:52:37,821 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 19:52:37,822 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [202338506] [2024-09-17 19:52:37,822 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [202338506] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-17 19:52:37,822 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-17 19:52:37,823 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-09-17 19:52:37,824 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2146731304] [2024-09-17 19:52:37,825 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-17 19:52:37,829 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-09-17 19:52:37,829 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 19:52:37,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-09-17 19:52:37,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-09-17 19:52:37,858 INFO L87 Difference]: Start difference. First operand has 18 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 13 states have internal predecessors, (16), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 4 states have internal predecessors, (4), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-17 19:52:37,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 19:52:37,960 INFO L93 Difference]: Finished difference Result 23 states and 30 transitions. [2024-09-17 19:52:37,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-09-17 19:52:37,964 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 4 states have internal predecessors, (4), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2024-09-17 19:52:37,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 19:52:37,972 INFO L225 Difference]: With dead ends: 23 [2024-09-17 19:52:37,972 INFO L226 Difference]: Without dead ends: 21 [2024-09-17 19:52:37,974 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-09-17 19:52:37,977 INFO L434 NwaCegarLoop]: 11 mSDtfsCounter, 7 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-17 19:52:37,978 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 20 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-17 19:52:37,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2024-09-17 19:52:38,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 17. [2024-09-17 19:52:38,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 12 states have internal predecessors, (14), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-09-17 19:52:38,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 20 transitions. [2024-09-17 19:52:38,011 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 20 transitions. Word has length 5 [2024-09-17 19:52:38,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 19:52:38,011 INFO L474 AbstractCegarLoop]: Abstraction has 17 states and 20 transitions. [2024-09-17 19:52:38,011 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 4 states have internal predecessors, (4), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-17 19:52:38,011 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 20 transitions. [2024-09-17 19:52:38,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2024-09-17 19:52:38,012 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 19:52:38,013 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2024-09-17 19:52:38,013 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-09-17 19:52:38,013 INFO L399 AbstractCegarLoop]: === Iteration 2 === Targeting fiboErr0ENSURES_VIOLATIONPOST_CONDITION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, fiboErr0ENSURES_VIOLATIONPOST_CONDITION] === [2024-09-17 19:52:38,014 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 19:52:38,014 INFO L85 PathProgramCache]: Analyzing trace with hash 2035074950, now seen corresponding path program 1 times [2024-09-17 19:52:38,014 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 19:52:38,015 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1035552662] [2024-09-17 19:52:38,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 19:52:38,015 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 19:52:38,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:52:38,130 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-17 19:52:38,130 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 19:52:38,130 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1035552662] [2024-09-17 19:52:38,130 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1035552662] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-17 19:52:38,130 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-17 19:52:38,130 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-09-17 19:52:38,131 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [88488840] [2024-09-17 19:52:38,131 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-17 19:52:38,132 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-17 19:52:38,132 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 19:52:38,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-17 19:52:38,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-17 19:52:38,133 INFO L87 Difference]: Start difference. First operand 17 states and 20 transitions. Second operand has 5 states, 4 states have (on average 1.25) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-17 19:52:38,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 19:52:38,202 INFO L93 Difference]: Finished difference Result 27 states and 31 transitions. [2024-09-17 19:52:38,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-17 19:52:38,204 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.25) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2024-09-17 19:52:38,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 19:52:38,204 INFO L225 Difference]: With dead ends: 27 [2024-09-17 19:52:38,205 INFO L226 Difference]: Without dead ends: 27 [2024-09-17 19:52:38,205 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 [2024-09-17 19:52:38,206 INFO L434 NwaCegarLoop]: 14 mSDtfsCounter, 15 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-17 19:52:38,207 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 44 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-17 19:52:38,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2024-09-17 19:52:38,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 26. [2024-09-17 19:52:38,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 18 states have internal predecessors, (21), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2024-09-17 19:52:38,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 31 transitions. [2024-09-17 19:52:38,214 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 31 transitions. Word has length 6 [2024-09-17 19:52:38,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 19:52:38,215 INFO L474 AbstractCegarLoop]: Abstraction has 26 states and 31 transitions. [2024-09-17 19:52:38,215 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.25) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-17 19:52:38,216 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 31 transitions. [2024-09-17 19:52:38,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2024-09-17 19:52:38,216 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 19:52:38,217 INFO L216 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1] [2024-09-17 19:52:38,217 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-09-17 19:52:38,218 INFO L399 AbstractCegarLoop]: === Iteration 3 === Targeting fiboErr0ENSURES_VIOLATIONPOST_CONDITION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, fiboErr0ENSURES_VIOLATIONPOST_CONDITION] === [2024-09-17 19:52:38,219 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 19:52:38,220 INFO L85 PathProgramCache]: Analyzing trace with hash -254199789, now seen corresponding path program 1 times [2024-09-17 19:52:38,220 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 19:52:38,220 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1247843416] [2024-09-17 19:52:38,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 19:52:38,221 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 19:52:38,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:52:38,352 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-17 19:52:38,352 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 19:52:38,353 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1247843416] [2024-09-17 19:52:38,353 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1247843416] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-17 19:52:38,353 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1299524904] [2024-09-17 19:52:38,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 19:52:38,353 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 19:52:38,354 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 19:52:38,356 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) [2024-09-17 19:52:38,359 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-09-17 19:52:38,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:52:38,406 INFO L262 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-09-17 19:52:38,411 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-17 19:52:38,461 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-17 19:52:38,462 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-17 19:52:38,539 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-17 19:52:38,540 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1299524904] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-17 19:52:38,540 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-17 19:52:38,540 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 11 [2024-09-17 19:52:38,541 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1927415615] [2024-09-17 19:52:38,541 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-17 19:52:38,541 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-09-17 19:52:38,541 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 19:52:38,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-09-17 19:52:38,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2024-09-17 19:52:38,543 INFO L87 Difference]: Start difference. First operand 26 states and 31 transitions. Second operand has 12 states, 10 states have (on average 1.5) internal successors, (15), 7 states have internal predecessors, (15), 4 states have call successors, (4), 4 states have call predecessors, (4), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-17 19:52:38,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 19:52:38,717 INFO L93 Difference]: Finished difference Result 57 states and 64 transitions. [2024-09-17 19:52:38,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-09-17 19:52:38,717 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 1.5) internal successors, (15), 7 states have internal predecessors, (15), 4 states have call successors, (4), 4 states have call predecessors, (4), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2024-09-17 19:52:38,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 19:52:38,718 INFO L225 Difference]: With dead ends: 57 [2024-09-17 19:52:38,719 INFO L226 Difference]: Without dead ends: 57 [2024-09-17 19:52:38,719 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2024-09-17 19:52:38,720 INFO L434 NwaCegarLoop]: 24 mSDtfsCounter, 58 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 121 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 144 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-17 19:52:38,720 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [59 Valid, 82 Invalid, 144 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 121 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-17 19:52:38,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2024-09-17 19:52:38,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 53. [2024-09-17 19:52:38,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 35 states have (on average 1.2) internal successors, (42), 36 states have internal predecessors, (42), 11 states have call successors, (11), 5 states have call predecessors, (11), 5 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2024-09-17 19:52:38,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 64 transitions. [2024-09-17 19:52:38,738 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 64 transitions. Word has length 10 [2024-09-17 19:52:38,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 19:52:38,738 INFO L474 AbstractCegarLoop]: Abstraction has 53 states and 64 transitions. [2024-09-17 19:52:38,738 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 1.5) internal successors, (15), 7 states have internal predecessors, (15), 4 states have call successors, (4), 4 states have call predecessors, (4), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-17 19:52:38,739 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 64 transitions. [2024-09-17 19:52:38,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2024-09-17 19:52:38,739 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 19:52:38,739 INFO L216 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1] [2024-09-17 19:52:38,756 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-09-17 19:52:38,943 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 19:52:38,944 INFO L399 AbstractCegarLoop]: === Iteration 4 === Targeting fiboErr0ENSURES_VIOLATIONPOST_CONDITION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, fiboErr0ENSURES_VIOLATIONPOST_CONDITION] === [2024-09-17 19:52:38,945 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 19:52:38,945 INFO L85 PathProgramCache]: Analyzing trace with hash -254987590, now seen corresponding path program 2 times [2024-09-17 19:52:38,945 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 19:52:38,945 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1692481233] [2024-09-17 19:52:38,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 19:52:38,945 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 19:52:38,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:52:39,247 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 28 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-17 19:52:39,248 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 19:52:39,248 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1692481233] [2024-09-17 19:52:39,250 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1692481233] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-17 19:52:39,250 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [144202596] [2024-09-17 19:52:39,250 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-17 19:52:39,250 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 19:52:39,251 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 19:52:39,254 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) [2024-09-17 19:52:39,256 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-09-17 19:52:39,294 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-09-17 19:52:39,294 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-17 19:52:39,296 INFO L262 TraceCheckSpWp]: Trace formula consists of 35 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-09-17 19:52:39,298 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-17 19:52:39,334 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2024-09-17 19:52:39,334 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-17 19:52:39,334 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [144202596] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-17 19:52:39,335 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-09-17 19:52:39,335 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [13] total 16 [2024-09-17 19:52:39,335 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1420919348] [2024-09-17 19:52:39,335 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-17 19:52:39,336 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-17 19:52:39,336 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 19:52:39,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-17 19:52:39,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2024-09-17 19:52:39,337 INFO L87 Difference]: Start difference. First operand 53 states and 64 transitions. Second operand has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-17 19:52:39,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 19:52:39,379 INFO L93 Difference]: Finished difference Result 56 states and 75 transitions. [2024-09-17 19:52:39,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-17 19:52:39,380 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2024-09-17 19:52:39,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 19:52:39,383 INFO L225 Difference]: With dead ends: 56 [2024-09-17 19:52:39,383 INFO L226 Difference]: Without dead ends: 56 [2024-09-17 19:52:39,383 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2024-09-17 19:52:39,384 INFO L434 NwaCegarLoop]: 12 mSDtfsCounter, 11 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-17 19:52:39,385 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 19 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-17 19:52:39,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2024-09-17 19:52:39,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 53. [2024-09-17 19:52:39,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 35 states have (on average 1.2) internal successors, (42), 36 states have internal predecessors, (42), 11 states have call successors, (11), 5 states have call predecessors, (11), 5 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2024-09-17 19:52:39,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 64 transitions. [2024-09-17 19:52:39,399 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 64 transitions. Word has length 22 [2024-09-17 19:52:39,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 19:52:39,399 INFO L474 AbstractCegarLoop]: Abstraction has 53 states and 64 transitions. [2024-09-17 19:52:39,399 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-17 19:52:39,400 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 64 transitions. [2024-09-17 19:52:39,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2024-09-17 19:52:39,400 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 19:52:39,400 INFO L216 NwaCegarLoop]: trace histogram [6, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-17 19:52:39,412 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-09-17 19:52:39,601 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 19:52:39,601 INFO L399 AbstractCegarLoop]: === Iteration 5 === Targeting fiboErr0ENSURES_VIOLATIONPOST_CONDITION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, fiboErr0ENSURES_VIOLATIONPOST_CONDITION] === [2024-09-17 19:52:39,602 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 19:52:39,602 INFO L85 PathProgramCache]: Analyzing trace with hash -2098277332, now seen corresponding path program 1 times [2024-09-17 19:52:39,602 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 19:52:39,603 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1604532731] [2024-09-17 19:52:39,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 19:52:39,603 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 19:52:39,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:52:39,683 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2024-09-17 19:52:39,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:52:39,706 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-09-17 19:52:39,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:52:39,711 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 12 proven. 3 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-09-17 19:52:39,711 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 19:52:39,711 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1604532731] [2024-09-17 19:52:39,711 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1604532731] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-17 19:52:39,711 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [311538130] [2024-09-17 19:52:39,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 19:52:39,712 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 19:52:39,712 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 19:52:39,713 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) [2024-09-17 19:52:39,715 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-09-17 19:52:39,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:52:39,755 INFO L262 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-09-17 19:52:39,757 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-17 19:52:39,874 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 13 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-09-17 19:52:39,876 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-17 19:52:40,024 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 2 proven. 43 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-09-17 19:52:40,025 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [311538130] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-17 19:52:40,025 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-17 19:52:40,025 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 13, 13] total 16 [2024-09-17 19:52:40,025 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1131023616] [2024-09-17 19:52:40,025 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-17 19:52:40,026 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-09-17 19:52:40,026 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 19:52:40,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-09-17 19:52:40,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2024-09-17 19:52:40,028 INFO L87 Difference]: Start difference. First operand 53 states and 64 transitions. Second operand has 16 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 12 states have internal predecessors, (34), 7 states have call successors, (9), 6 states have call predecessors, (9), 3 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-17 19:52:40,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 19:52:40,304 INFO L93 Difference]: Finished difference Result 115 states and 196 transitions. [2024-09-17 19:52:40,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-09-17 19:52:40,306 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 12 states have internal predecessors, (34), 7 states have call successors, (9), 6 states have call predecessors, (9), 3 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 30 [2024-09-17 19:52:40,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 19:52:40,309 INFO L225 Difference]: With dead ends: 115 [2024-09-17 19:52:40,310 INFO L226 Difference]: Without dead ends: 115 [2024-09-17 19:52:40,311 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 48 SyntacticMatches, 10 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=114, Invalid=306, Unknown=0, NotChecked=0, Total=420 [2024-09-17 19:52:40,312 INFO L434 NwaCegarLoop]: 19 mSDtfsCounter, 81 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 215 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 266 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 215 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-17 19:52:40,312 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [82 Valid, 81 Invalid, 266 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 215 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-17 19:52:40,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2024-09-17 19:52:40,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 100. [2024-09-17 19:52:40,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 64 states have (on average 1.1875) internal successors, (76), 66 states have internal predecessors, (76), 22 states have call successors, (22), 8 states have call predecessors, (22), 12 states have return successors, (65), 25 states have call predecessors, (65), 22 states have call successors, (65) [2024-09-17 19:52:40,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 163 transitions. [2024-09-17 19:52:40,332 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 163 transitions. Word has length 30 [2024-09-17 19:52:40,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 19:52:40,332 INFO L474 AbstractCegarLoop]: Abstraction has 100 states and 163 transitions. [2024-09-17 19:52:40,333 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 12 states have internal predecessors, (34), 7 states have call successors, (9), 6 states have call predecessors, (9), 3 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-17 19:52:40,333 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 163 transitions. [2024-09-17 19:52:40,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2024-09-17 19:52:40,334 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 19:52:40,334 INFO L216 NwaCegarLoop]: trace histogram [6, 5, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-17 19:52:40,346 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-09-17 19:52:40,536 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 19:52:40,536 INFO L399 AbstractCegarLoop]: === Iteration 6 === Targeting fiboErr0ENSURES_VIOLATIONPOST_CONDITION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, fiboErr0ENSURES_VIOLATIONPOST_CONDITION] === [2024-09-17 19:52:40,537 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 19:52:40,537 INFO L85 PathProgramCache]: Analyzing trace with hash -2106411776, now seen corresponding path program 1 times [2024-09-17 19:52:40,537 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 19:52:40,537 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [389236414] [2024-09-17 19:52:40,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 19:52:40,537 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 19:52:40,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:52:40,794 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2024-09-17 19:52:40,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:52:40,819 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2024-09-17 19:52:40,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:52:40,845 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 1 proven. 47 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-09-17 19:52:40,845 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 19:52:40,845 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [389236414] [2024-09-17 19:52:40,845 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [389236414] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-17 19:52:40,846 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [764690943] [2024-09-17 19:52:40,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 19:52:40,846 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 19:52:40,846 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 19:52:40,848 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) [2024-09-17 19:52:40,849 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-09-17 19:52:40,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:52:40,891 INFO L262 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 27 conjuncts are in the unsatisfiable core [2024-09-17 19:52:40,894 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-17 19:52:40,966 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 1 proven. 47 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-09-17 19:52:40,966 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-17 19:52:41,753 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-09-17 19:52:41,754 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [764690943] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-17 19:52:41,754 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-17 19:52:41,754 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 25 [2024-09-17 19:52:41,754 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [559876955] [2024-09-17 19:52:41,754 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-17 19:52:41,754 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-09-17 19:52:41,755 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 19:52:41,755 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-09-17 19:52:41,755 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=573, Unknown=0, NotChecked=0, Total=650 [2024-09-17 19:52:41,756 INFO L87 Difference]: Start difference. First operand 100 states and 163 transitions. Second operand has 26 states, 23 states have (on average 1.6521739130434783) internal successors, (38), 18 states have internal predecessors, (38), 12 states have call successors, (12), 9 states have call predecessors, (12), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-09-17 19:52:43,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 19:52:43,411 INFO L93 Difference]: Finished difference Result 159 states and 266 transitions. [2024-09-17 19:52:43,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2024-09-17 19:52:43,411 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 23 states have (on average 1.6521739130434783) internal successors, (38), 18 states have internal predecessors, (38), 12 states have call successors, (12), 9 states have call predecessors, (12), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 31 [2024-09-17 19:52:43,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 19:52:43,413 INFO L225 Difference]: With dead ends: 159 [2024-09-17 19:52:43,414 INFO L226 Difference]: Without dead ends: 157 [2024-09-17 19:52:43,415 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 640 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=360, Invalid=2832, Unknown=0, NotChecked=0, Total=3192 [2024-09-17 19:52:43,416 INFO L434 NwaCegarLoop]: 20 mSDtfsCounter, 125 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 928 mSolverCounterSat, 101 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 147 SdHoareTripleChecker+Invalid, 1029 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 101 IncrementalHoareTripleChecker+Valid, 928 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-09-17 19:52:43,416 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [138 Valid, 147 Invalid, 1029 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [101 Valid, 928 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-09-17 19:52:43,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2024-09-17 19:52:43,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 138. [2024-09-17 19:52:43,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 91 states have (on average 1.1978021978021978) internal successors, (109), 90 states have internal predecessors, (109), 28 states have call successors, (28), 11 states have call predecessors, (28), 17 states have return successors, (103), 36 states have call predecessors, (103), 28 states have call successors, (103) [2024-09-17 19:52:43,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 240 transitions. [2024-09-17 19:52:43,456 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 240 transitions. Word has length 31 [2024-09-17 19:52:43,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 19:52:43,456 INFO L474 AbstractCegarLoop]: Abstraction has 138 states and 240 transitions. [2024-09-17 19:52:43,456 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 23 states have (on average 1.6521739130434783) internal successors, (38), 18 states have internal predecessors, (38), 12 states have call successors, (12), 9 states have call predecessors, (12), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-09-17 19:52:43,456 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 240 transitions. [2024-09-17 19:52:43,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2024-09-17 19:52:43,457 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 19:52:43,457 INFO L216 NwaCegarLoop]: trace histogram [6, 6, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-17 19:52:43,474 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-09-17 19:52:43,658 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 19:52:43,658 INFO L399 AbstractCegarLoop]: === Iteration 7 === Targeting fiboErr0ENSURES_VIOLATIONPOST_CONDITION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, fiboErr0ENSURES_VIOLATIONPOST_CONDITION] === [2024-09-17 19:52:43,659 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 19:52:43,659 INFO L85 PathProgramCache]: Analyzing trace with hash -851368470, now seen corresponding path program 1 times [2024-09-17 19:52:43,659 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 19:52:43,659 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [460041090] [2024-09-17 19:52:43,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 19:52:43,659 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 19:52:43,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:52:43,786 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2024-09-17 19:52:43,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:52:43,791 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2024-09-17 19:52:43,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:52:43,819 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 28 proven. 24 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-09-17 19:52:43,819 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 19:52:43,820 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [460041090] [2024-09-17 19:52:43,820 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [460041090] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-17 19:52:43,820 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [838756762] [2024-09-17 19:52:43,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 19:52:43,820 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 19:52:43,820 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 19:52:43,822 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) [2024-09-17 19:52:43,823 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-09-17 19:52:43,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:52:43,868 INFO L262 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-09-17 19:52:43,870 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-17 19:52:43,913 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 30 proven. 24 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-09-17 19:52:43,913 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-17 19:52:44,029 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 30 proven. 24 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-09-17 19:52:44,029 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [838756762] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-17 19:52:44,029 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-17 19:52:44,029 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 15 [2024-09-17 19:52:44,029 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [409342891] [2024-09-17 19:52:44,030 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-17 19:52:44,030 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-09-17 19:52:44,030 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 19:52:44,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-09-17 19:52:44,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2024-09-17 19:52:44,031 INFO L87 Difference]: Start difference. First operand 138 states and 240 transitions. Second operand has 15 states, 14 states have (on average 2.0) internal successors, (28), 11 states have internal predecessors, (28), 5 states have call successors, (6), 5 states have call predecessors, (6), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2024-09-17 19:52:44,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 19:52:44,303 INFO L93 Difference]: Finished difference Result 86 states and 100 transitions. [2024-09-17 19:52:44,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-09-17 19:52:44,304 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 2.0) internal successors, (28), 11 states have internal predecessors, (28), 5 states have call successors, (6), 5 states have call predecessors, (6), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 32 [2024-09-17 19:52:44,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 19:52:44,306 INFO L225 Difference]: With dead ends: 86 [2024-09-17 19:52:44,306 INFO L226 Difference]: Without dead ends: 86 [2024-09-17 19:52:44,306 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 59 SyntacticMatches, 10 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=219, Invalid=537, Unknown=0, NotChecked=0, Total=756 [2024-09-17 19:52:44,307 INFO L434 NwaCegarLoop]: 11 mSDtfsCounter, 107 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 184 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 242 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 184 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-17 19:52:44,307 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [108 Valid, 48 Invalid, 242 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 184 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-17 19:52:44,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2024-09-17 19:52:44,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 79. [2024-09-17 19:52:44,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 52 states have (on average 1.1538461538461537) internal successors, (60), 54 states have internal predecessors, (60), 16 states have call successors, (16), 8 states have call predecessors, (16), 9 states have return successors, (20), 16 states have call predecessors, (20), 14 states have call successors, (20) [2024-09-17 19:52:44,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 96 transitions. [2024-09-17 19:52:44,320 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 96 transitions. Word has length 32 [2024-09-17 19:52:44,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 19:52:44,320 INFO L474 AbstractCegarLoop]: Abstraction has 79 states and 96 transitions. [2024-09-17 19:52:44,320 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 2.0) internal successors, (28), 11 states have internal predecessors, (28), 5 states have call successors, (6), 5 states have call predecessors, (6), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2024-09-17 19:52:44,320 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 96 transitions. [2024-09-17 19:52:44,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2024-09-17 19:52:44,321 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 19:52:44,322 INFO L216 NwaCegarLoop]: trace histogram [9, 8, 7, 7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-17 19:52:44,339 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-09-17 19:52:44,522 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2024-09-17 19:52:44,523 INFO L399 AbstractCegarLoop]: === Iteration 8 === Targeting fiboErr0ENSURES_VIOLATIONPOST_CONDITION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, fiboErr0ENSURES_VIOLATIONPOST_CONDITION] === [2024-09-17 19:52:44,523 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 19:52:44,523 INFO L85 PathProgramCache]: Analyzing trace with hash 1641789625, now seen corresponding path program 2 times [2024-09-17 19:52:44,523 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 19:52:44,523 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1110987319] [2024-09-17 19:52:44,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 19:52:44,523 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 19:52:44,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:52:44,674 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2024-09-17 19:52:44,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:52:44,677 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2024-09-17 19:52:44,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:52:44,680 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 80 proven. 35 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-09-17 19:52:44,680 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 19:52:44,681 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1110987319] [2024-09-17 19:52:44,681 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1110987319] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-17 19:52:44,681 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1337021231] [2024-09-17 19:52:44,681 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-17 19:52:44,681 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 19:52:44,681 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 19:52:44,683 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) [2024-09-17 19:52:44,684 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-09-17 19:52:44,726 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-17 19:52:44,726 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-17 19:52:44,727 INFO L262 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-09-17 19:52:44,729 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-17 19:52:44,782 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 111 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2024-09-17 19:52:44,782 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-17 19:52:44,783 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1337021231] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-17 19:52:44,783 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-09-17 19:52:44,783 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [14] total 16 [2024-09-17 19:52:44,783 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1962197606] [2024-09-17 19:52:44,783 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-17 19:52:44,784 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-09-17 19:52:44,784 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 19:52:44,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-09-17 19:52:44,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2024-09-17 19:52:44,785 INFO L87 Difference]: Start difference. First operand 79 states and 96 transitions. Second operand has 15 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 8 states have internal predecessors, (27), 7 states have call successors, (8), 7 states have call predecessors, (8), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-09-17 19:52:44,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 19:52:44,977 INFO L93 Difference]: Finished difference Result 55 states and 58 transitions. [2024-09-17 19:52:44,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-09-17 19:52:44,978 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 8 states have internal predecessors, (27), 7 states have call successors, (8), 7 states have call predecessors, (8), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 43 [2024-09-17 19:52:44,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 19:52:44,979 INFO L225 Difference]: With dead ends: 55 [2024-09-17 19:52:44,979 INFO L226 Difference]: Without dead ends: 54 [2024-09-17 19:52:44,979 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=152, Invalid=354, Unknown=0, NotChecked=0, Total=506 [2024-09-17 19:52:44,980 INFO L434 NwaCegarLoop]: 12 mSDtfsCounter, 73 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 239 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 275 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 239 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-17 19:52:44,980 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [74 Valid, 57 Invalid, 275 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 239 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-17 19:52:44,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2024-09-17 19:52:44,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 52. [2024-09-17 19:52:44,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 35 states have (on average 1.0857142857142856) internal successors, (38), 36 states have internal predecessors, (38), 9 states have call successors, (9), 6 states have call predecessors, (9), 6 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2024-09-17 19:52:44,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 56 transitions. [2024-09-17 19:52:44,990 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 56 transitions. Word has length 43 [2024-09-17 19:52:44,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 19:52:44,990 INFO L474 AbstractCegarLoop]: Abstraction has 52 states and 56 transitions. [2024-09-17 19:52:44,991 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 8 states have internal predecessors, (27), 7 states have call successors, (8), 7 states have call predecessors, (8), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-09-17 19:52:44,991 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 56 transitions. [2024-09-17 19:52:44,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2024-09-17 19:52:44,991 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 19:52:44,992 INFO L216 NwaCegarLoop]: trace histogram [7, 6, 4, 4, 4, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1] [2024-09-17 19:52:45,008 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-09-17 19:52:45,195 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 19:52:45,196 INFO L399 AbstractCegarLoop]: === Iteration 9 === Targeting fiboErr0ENSURES_VIOLATIONPOST_CONDITION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, fiboErr0ENSURES_VIOLATIONPOST_CONDITION] === [2024-09-17 19:52:45,196 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 19:52:45,196 INFO L85 PathProgramCache]: Analyzing trace with hash 771033264, now seen corresponding path program 3 times [2024-09-17 19:52:45,196 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 19:52:45,197 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1901733176] [2024-09-17 19:52:45,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 19:52:45,197 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 19:52:45,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:52:45,415 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2024-09-17 19:52:45,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:52:45,477 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-17 19:52:45,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:52:45,495 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-17 19:52:45,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:52:45,517 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2024-09-17 19:52:45,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:52:45,527 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 2 proven. 59 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-09-17 19:52:45,528 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 19:52:45,528 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1901733176] [2024-09-17 19:52:45,528 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1901733176] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-17 19:52:45,528 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1736402111] [2024-09-17 19:52:45,528 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-17 19:52:45,528 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 19:52:45,528 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 19:52:45,530 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-17 19:52:45,531 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-09-17 19:52:45,577 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2024-09-17 19:52:45,577 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-17 19:52:45,578 INFO L262 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 31 conjuncts are in the unsatisfiable core [2024-09-17 19:52:45,580 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-17 19:52:45,637 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 2 proven. 59 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-09-17 19:52:45,637 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-17 19:52:46,217 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-09-17 19:52:46,218 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1736402111] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-17 19:52:46,218 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-17 19:52:46,218 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 24 [2024-09-17 19:52:46,218 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1715588422] [2024-09-17 19:52:46,219 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-17 19:52:46,219 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-09-17 19:52:46,219 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 19:52:46,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-09-17 19:52:46,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=532, Unknown=0, NotChecked=0, Total=600 [2024-09-17 19:52:46,220 INFO L87 Difference]: Start difference. First operand 52 states and 56 transitions. Second operand has 25 states, 22 states have (on average 1.6363636363636365) internal successors, (36), 17 states have internal predecessors, (36), 12 states have call successors, (12), 7 states have call predecessors, (12), 2 states have return successors, (7), 7 states have call predecessors, (7), 6 states have call successors, (7) [2024-09-17 19:52:46,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 19:52:46,635 INFO L93 Difference]: Finished difference Result 52 states and 54 transitions. [2024-09-17 19:52:46,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-09-17 19:52:46,635 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 22 states have (on average 1.6363636363636365) internal successors, (36), 17 states have internal predecessors, (36), 12 states have call successors, (12), 7 states have call predecessors, (12), 2 states have return successors, (7), 7 states have call predecessors, (7), 6 states have call successors, (7) Word has length 41 [2024-09-17 19:52:46,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 19:52:46,636 INFO L225 Difference]: With dead ends: 52 [2024-09-17 19:52:46,636 INFO L226 Difference]: Without dead ends: 52 [2024-09-17 19:52:46,637 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=122, Invalid=934, Unknown=0, NotChecked=0, Total=1056 [2024-09-17 19:52:46,638 INFO L434 NwaCegarLoop]: 17 mSDtfsCounter, 40 mSDsluCounter, 125 mSDsCounter, 0 mSdLazyCounter, 577 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 142 SdHoareTripleChecker+Invalid, 596 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 577 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-17 19:52:46,638 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 142 Invalid, 596 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 577 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-17 19:52:46,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2024-09-17 19:52:46,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2024-09-17 19:52:46,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 35 states have (on average 1.0285714285714285) internal successors, (36), 36 states have internal predecessors, (36), 9 states have call successors, (9), 6 states have call predecessors, (9), 6 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2024-09-17 19:52:46,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 54 transitions. [2024-09-17 19:52:46,642 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 54 transitions. Word has length 41 [2024-09-17 19:52:46,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 19:52:46,643 INFO L474 AbstractCegarLoop]: Abstraction has 52 states and 54 transitions. [2024-09-17 19:52:46,643 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 22 states have (on average 1.6363636363636365) internal successors, (36), 17 states have internal predecessors, (36), 12 states have call successors, (12), 7 states have call predecessors, (12), 2 states have return successors, (7), 7 states have call predecessors, (7), 6 states have call successors, (7) [2024-09-17 19:52:46,643 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 54 transitions. [2024-09-17 19:52:46,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2024-09-17 19:52:46,646 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 19:52:46,646 INFO L216 NwaCegarLoop]: trace histogram [15, 14, 12, 7, 7, 7, 7, 7, 7, 7, 5, 3, 1, 1, 1] [2024-09-17 19:52:46,665 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-09-17 19:52:46,850 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 19:52:46,851 INFO L399 AbstractCegarLoop]: === Iteration 10 === Targeting fiboErr0ENSURES_VIOLATIONPOST_CONDITION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, fiboErr0ENSURES_VIOLATIONPOST_CONDITION] === [2024-09-17 19:52:46,851 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 19:52:46,851 INFO L85 PathProgramCache]: Analyzing trace with hash -1240694291, now seen corresponding path program 4 times [2024-09-17 19:52:46,851 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 19:52:46,851 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2010391253] [2024-09-17 19:52:46,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 19:52:46,852 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 19:52:46,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:52:47,306 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-17 19:52:47,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:52:47,457 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-17 19:52:47,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:52:47,535 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-17 19:52:47,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:52:47,591 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-17 19:52:47,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:52:47,600 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-17 19:52:47,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:52:47,621 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-09-17 19:52:47,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:52:47,631 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2024-09-17 19:52:47,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:52:47,658 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-17 19:52:47,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:52:47,666 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-17 19:52:47,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:52:47,678 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2024-09-17 19:52:47,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:52:47,750 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-17 19:52:47,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:52:47,776 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-17 19:52:47,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:52:47,784 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-17 19:52:47,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:52:47,794 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-09-17 19:52:47,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:52:47,802 INFO L134 CoverageAnalysis]: Checked inductivity of 556 backedges. 0 proven. 216 refuted. 0 times theorem prover too weak. 340 trivial. 0 not checked. [2024-09-17 19:52:47,802 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 19:52:47,803 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2010391253] [2024-09-17 19:52:47,803 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2010391253] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-17 19:52:47,803 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1894025570] [2024-09-17 19:52:47,803 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-17 19:52:47,803 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 19:52:47,803 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 19:52:47,805 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-17 19:52:47,806 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-09-17 19:52:47,875 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-17 19:52:47,875 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-17 19:52:47,878 INFO L262 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 70 conjuncts are in the unsatisfiable core [2024-09-17 19:52:47,881 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-17 19:52:48,250 INFO L134 CoverageAnalysis]: Checked inductivity of 556 backedges. 29 proven. 292 refuted. 0 times theorem prover too weak. 235 trivial. 0 not checked. [2024-09-17 19:52:48,250 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-17 19:52:49,144 INFO L134 CoverageAnalysis]: Checked inductivity of 556 backedges. 25 proven. 318 refuted. 0 times theorem prover too weak. 213 trivial. 0 not checked. [2024-09-17 19:52:49,144 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1894025570] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-17 19:52:49,144 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-17 19:52:49,144 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 21, 25] total 40 [2024-09-17 19:52:49,145 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1848922701] [2024-09-17 19:52:49,145 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-17 19:52:49,145 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2024-09-17 19:52:49,145 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 19:52:49,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2024-09-17 19:52:49,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=1492, Unknown=0, NotChecked=0, Total=1640 [2024-09-17 19:52:49,147 INFO L87 Difference]: Start difference. First operand 52 states and 54 transitions. Second operand has 41 states, 38 states have (on average 1.631578947368421) internal successors, (62), 29 states have internal predecessors, (62), 15 states have call successors, (16), 2 states have call predecessors, (16), 9 states have return successors, (24), 19 states have call predecessors, (24), 14 states have call successors, (24) [2024-09-17 19:52:49,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 19:52:49,760 INFO L93 Difference]: Finished difference Result 59 states and 62 transitions. [2024-09-17 19:52:49,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-09-17 19:52:49,760 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 38 states have (on average 1.631578947368421) internal successors, (62), 29 states have internal predecessors, (62), 15 states have call successors, (16), 2 states have call predecessors, (16), 9 states have return successors, (24), 19 states have call predecessors, (24), 14 states have call successors, (24) Word has length 101 [2024-09-17 19:52:49,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 19:52:49,762 INFO L225 Difference]: With dead ends: 59 [2024-09-17 19:52:49,762 INFO L226 Difference]: Without dead ends: 59 [2024-09-17 19:52:49,763 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 281 GetRequests, 224 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 739 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=368, Invalid=2938, Unknown=0, NotChecked=0, Total=3306 [2024-09-17 19:52:49,764 INFO L434 NwaCegarLoop]: 10 mSDtfsCounter, 67 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 855 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 903 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 855 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-09-17 19:52:49,765 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [71 Valid, 84 Invalid, 903 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 855 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-09-17 19:52:49,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2024-09-17 19:52:49,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 51. [2024-09-17 19:52:49,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 35 states have (on average 1.0) internal successors, (35), 35 states have internal predecessors, (35), 9 states have call successors, (9), 6 states have call predecessors, (9), 6 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2024-09-17 19:52:49,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 53 transitions. [2024-09-17 19:52:49,771 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 53 transitions. Word has length 101 [2024-09-17 19:52:49,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 19:52:49,772 INFO L474 AbstractCegarLoop]: Abstraction has 51 states and 53 transitions. [2024-09-17 19:52:49,772 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 38 states have (on average 1.631578947368421) internal successors, (62), 29 states have internal predecessors, (62), 15 states have call successors, (16), 2 states have call predecessors, (16), 9 states have return successors, (24), 19 states have call predecessors, (24), 14 states have call successors, (24) [2024-09-17 19:52:49,772 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 53 transitions. [2024-09-17 19:52:49,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2024-09-17 19:52:49,774 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 19:52:49,779 INFO L216 NwaCegarLoop]: trace histogram [15, 15, 12, 7, 7, 7, 7, 7, 7, 7, 5, 3, 1, 1, 1, 1, 1, 1] [2024-09-17 19:52:49,795 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-09-17 19:52:49,980 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,9 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 19:52:49,980 INFO L399 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, fiboErr0ENSURES_VIOLATIONPOST_CONDITION] === [2024-09-17 19:52:49,980 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 19:52:49,980 INFO L85 PathProgramCache]: Analyzing trace with hash -151965584, now seen corresponding path program 1 times [2024-09-17 19:52:49,980 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 19:52:49,981 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [673727159] [2024-09-17 19:52:49,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 19:52:49,981 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 19:52:50,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:52:50,374 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-09-17 19:52:50,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:52:50,611 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-17 19:52:50,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:52:50,743 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-17 19:52:50,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:52:50,814 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-17 19:52:50,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:52:50,858 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-17 19:52:50,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:52:50,867 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-17 19:52:50,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:52:50,890 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-09-17 19:52:50,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:52:50,898 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2024-09-17 19:52:50,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:52:50,924 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-17 19:52:50,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:52:50,931 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-17 19:52:50,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:52:50,941 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2024-09-17 19:52:50,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:52:50,977 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-17 19:52:50,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:52:50,999 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-17 19:52:51,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:52:51,007 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-17 19:52:51,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:52:51,015 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-09-17 19:52:51,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:52:51,026 INFO L134 CoverageAnalysis]: Checked inductivity of 570 backedges. 0 proven. 185 refuted. 0 times theorem prover too weak. 385 trivial. 0 not checked. [2024-09-17 19:52:51,026 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 19:52:51,026 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [673727159] [2024-09-17 19:52:51,026 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [673727159] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-17 19:52:51,026 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [710908780] [2024-09-17 19:52:51,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 19:52:51,027 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 19:52:51,027 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 19:52:51,028 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-17 19:52:51,030 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-09-17 19:52:51,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:52:51,102 INFO L262 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 64 conjuncts are in the unsatisfiable core [2024-09-17 19:52:51,105 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-17 19:52:51,275 INFO L134 CoverageAnalysis]: Checked inductivity of 570 backedges. 7 proven. 200 refuted. 0 times theorem prover too weak. 363 trivial. 0 not checked. [2024-09-17 19:52:51,275 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-17 19:52:51,735 INFO L134 CoverageAnalysis]: Checked inductivity of 570 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 556 trivial. 0 not checked. [2024-09-17 19:52:51,735 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [710908780] provided 1 perfect and 1 imperfect interpolant sequences [2024-09-17 19:52:51,735 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-09-17 19:52:51,736 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [16, 17] total 23 [2024-09-17 19:52:51,736 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1737530117] [2024-09-17 19:52:51,736 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-17 19:52:51,736 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-09-17 19:52:51,736 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 19:52:51,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-09-17 19:52:51,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=453, Unknown=0, NotChecked=0, Total=506 [2024-09-17 19:52:51,737 INFO L87 Difference]: Start difference. First operand 51 states and 53 transitions. Second operand has 6 states, 4 states have (on average 3.25) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-17 19:52:51,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 19:52:51,772 INFO L93 Difference]: Finished difference Result 49 states and 51 transitions. [2024-09-17 19:52:51,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-09-17 19:52:51,772 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 4 states have (on average 3.25) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 105 [2024-09-17 19:52:51,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 19:52:51,772 INFO L225 Difference]: With dead ends: 49 [2024-09-17 19:52:51,772 INFO L226 Difference]: Without dead ends: 0 [2024-09-17 19:52:51,773 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 273 GetRequests, 249 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=61, Invalid=539, Unknown=0, NotChecked=0, Total=600 [2024-09-17 19:52:51,773 INFO L434 NwaCegarLoop]: 11 mSDtfsCounter, 1 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-17 19:52:51,773 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 47 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-17 19:52:51,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2024-09-17 19:52:51,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2024-09-17 19:52:51,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-17 19:52:51,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2024-09-17 19:52:51,774 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 105 [2024-09-17 19:52:51,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 19:52:51,774 INFO L474 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2024-09-17 19:52:51,775 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 4 states have (on average 3.25) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-17 19:52:51,775 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2024-09-17 19:52:51,775 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2024-09-17 19:52:51,777 INFO L785 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 2 remaining) [2024-09-17 19:52:51,778 INFO L785 garLoopResultBuilder]: Registering result SAFE for location fiboErr0ENSURES_VIOLATIONPOST_CONDITION (0 of 2 remaining) [2024-09-17 19:52:51,791 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-09-17 19:52:51,981 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2024-09-17 19:52:51,983 INFO L408 BasicCegarLoop]: Path program histogram: [4, 2, 1, 1, 1, 1, 1] [2024-09-17 19:52:51,985 INFO L165 ceAbstractionStarter]: Computing trace abstraction results [2024-09-17 19:52:51,987 INFO L201 PluginConnector]: Adding new model witness-2.1.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 17.09 07:52:51 BoogieIcfgContainer [2024-09-17 19:52:51,987 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2024-09-17 19:52:51,988 INFO L158 Benchmark]: Toolchain (without parser) took 15131.90ms. Allocated memory was 176.2MB in the beginning and 325.1MB in the end (delta: 148.9MB). Free memory was 106.1MB in the beginning and 214.2MB in the end (delta: -108.1MB). Peak memory consumption was 42.7MB. Max. memory is 16.1GB. [2024-09-17 19:52:51,988 INFO L158 Benchmark]: CDTParser took 0.21ms. Allocated memory is still 176.2MB. Free memory was 134.2MB in the beginning and 134.1MB in the end (delta: 160.8kB). There was no memory consumed. Max. memory is 16.1GB. [2024-09-17 19:52:51,988 INFO L158 Benchmark]: Witness Parser took 0.59ms. Allocated memory is still 176.2MB. Free memory is still 108.1MB. There was no memory consumed. Max. memory is 16.1GB. [2024-09-17 19:52:51,988 INFO L158 Benchmark]: CACSL2BoogieTranslator took 258.85ms. Allocated memory is still 176.2MB. Free memory was 106.0MB in the beginning and 93.3MB in the end (delta: 12.6MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2024-09-17 19:52:51,988 INFO L158 Benchmark]: Boogie Procedure Inliner took 28.79ms. Allocated memory is still 176.2MB. Free memory was 93.2MB in the beginning and 91.9MB in the end (delta: 1.3MB). There was no memory consumed. Max. memory is 16.1GB. [2024-09-17 19:52:51,989 INFO L158 Benchmark]: Boogie Preprocessor took 38.27ms. Allocated memory is still 176.2MB. Free memory was 91.9MB in the beginning and 90.4MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-09-17 19:52:51,989 INFO L158 Benchmark]: RCFGBuilder took 292.58ms. Allocated memory is still 176.2MB. Free memory was 90.2MB in the beginning and 137.8MB in the end (delta: -47.6MB). Peak memory consumption was 4.5MB. Max. memory is 16.1GB. [2024-09-17 19:52:51,989 INFO L158 Benchmark]: TraceAbstraction took 14506.78ms. Allocated memory was 176.2MB in the beginning and 325.1MB in the end (delta: 148.9MB). Free memory was 137.2MB in the beginning and 214.2MB in the end (delta: -77.1MB). Peak memory consumption was 73.9MB. Max. memory is 16.1GB. [2024-09-17 19:52:51,991 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21ms. Allocated memory is still 176.2MB. Free memory was 134.2MB in the beginning and 134.1MB in the end (delta: 160.8kB). There was no memory consumed. Max. memory is 16.1GB. * Witness Parser took 0.59ms. Allocated memory is still 176.2MB. Free memory is still 108.1MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 258.85ms. Allocated memory is still 176.2MB. Free memory was 106.0MB in the beginning and 93.3MB in the end (delta: 12.6MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 28.79ms. Allocated memory is still 176.2MB. Free memory was 93.2MB in the beginning and 91.9MB in the end (delta: 1.3MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 38.27ms. Allocated memory is still 176.2MB. Free memory was 91.9MB in the beginning and 90.4MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 292.58ms. Allocated memory is still 176.2MB. Free memory was 90.2MB in the beginning and 137.8MB in the end (delta: -47.6MB). Peak memory consumption was 4.5MB. Max. memory is 16.1GB. * TraceAbstraction took 14506.78ms. Allocated memory was 176.2MB in the beginning and 325.1MB in the end (delta: 148.9MB). Free memory was 137.2MB in the beginning and 214.2MB in the end (delta: -77.1MB). Peak memory consumption was 73.9MB. 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 - PositiveResult [Line: 29]: a call to reach_error is unreachable For all program executions holds that a call to reach_error is unreachable at this location - PositiveResult [Line: 7]: procedure postcondition always holds For all program executions holds that procedure postcondition always holds at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 18 locations, 2 error locations. Started 1 CEGAR loops. OverallTime: 14.4s, OverallIterations: 11, TraceHistogramMax: 15, PathProgramHistogramMax: 4, EmptinessCheckTime: 0.0s, AutomataDifference: 4.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 615 SdHoareTripleChecker+Valid, 2.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 585 mSDsluCounter, 771 SdHoareTripleChecker+Invalid, 1.7s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 610 mSDsCounter, 343 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 3264 IncrementalHoareTripleChecker+Invalid, 3607 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 343 mSolverCounterUnsat, 161 mSDtfsCounter, 3264 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1087 GetRequests, 799 SyntacticMatches, 22 SemanticMatches, 266 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1932 ImplicationChecksByTransitivity, 3.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=138occurred in iteration=6, InterpolantAutomatonStates: 173, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 11 MinimizatonAttempts, 63 StatesRemovedByMinimization, 9 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 7.6s InterpolantComputationTime, 841 NumberOfCodeBlocks, 825 NumberOfCodeBlocksAsserted, 28 NumberOfCheckSat, 1164 ConstructedInterpolants, 0 QuantifiedInterpolants, 3682 SizeOfPredicates, 28 NumberOfNonLiveVariables, 1106 ConjunctsInSsa, 243 ConjunctsInUnsatCore, 27 InterpolantComputations, 5 PerfectInterpolantSequences, 2674/4408 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 2 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2024-09-17 19:52:52,014 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Ended with exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE