./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 04d6fb36 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-04d6fb3-m [2024-09-15 20:24:58,661 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-09-15 20:24:58,753 INFO L114 SettingsManager]: Loading settings from /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-09-15 20:24:58,758 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-09-15 20:24:58,759 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-09-15 20:24:58,792 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-09-15 20:24:58,795 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-09-15 20:24:58,795 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-09-15 20:24:58,796 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-09-15 20:24:58,796 INFO L153 SettingsManager]: * Use memory slicer=true [2024-09-15 20:24:58,796 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-09-15 20:24:58,797 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-09-15 20:24:58,797 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-09-15 20:24:58,800 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-09-15 20:24:58,801 INFO L153 SettingsManager]: * Use SBE=true [2024-09-15 20:24:58,802 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-09-15 20:24:58,802 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-09-15 20:24:58,802 INFO L153 SettingsManager]: * sizeof long=4 [2024-09-15 20:24:58,802 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-09-15 20:24:58,803 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-09-15 20:24:58,803 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-09-15 20:24:58,804 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-09-15 20:24:58,804 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-09-15 20:24:58,804 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-09-15 20:24:58,804 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-09-15 20:24:58,805 INFO L153 SettingsManager]: * sizeof long double=12 [2024-09-15 20:24:58,805 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-09-15 20:24:58,805 INFO L153 SettingsManager]: * Use constant arrays=true [2024-09-15 20:24:58,806 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-09-15 20:24:58,806 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-09-15 20:24:58,806 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-09-15 20:24:58,807 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-09-15 20:24:58,807 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-15 20:24:58,811 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-09-15 20:24:58,812 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-09-15 20:24:58,813 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-09-15 20:24:58,813 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-09-15 20:24:58,814 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-09-15 20:24:58,814 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-09-15 20:24:58,815 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-09-15 20:24:58,815 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-09-15 20:24:58,815 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-09-15 20:24:58,816 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Positions where we compute the Hoare Annotation -> None [2024-09-15 20:24:59,153 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-09-15 20:24:59,175 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-09-15 20:24:59,179 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-09-15 20:24:59,180 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-09-15 20:24:59,181 INFO L274 PluginConnector]: Witness Parser initialized [2024-09-15 20:24:59,182 INFO L431 ainManager$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 [2024-09-15 20:24:59,242 INFO L270 PluginConnector]: Initializing CDTParser... [2024-09-15 20:24:59,243 INFO L274 PluginConnector]: CDTParser initialized [2024-09-15 20:24:59,244 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/certificate-witnesses-artifact/automizer/../sv-benchmarks/c/recursive-simple/fibo_5-1.c [2024-09-15 20:25:00,751 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-09-15 20:25:00,949 INFO L384 CDTParser]: Found 1 translation units. [2024-09-15 20:25:00,949 INFO L180 CDTParser]: Scanning /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/recursive-simple/fibo_5-1.c [2024-09-15 20:25:00,957 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/certificate-witnesses-artifact/automizer/data/5126b06f9/9b2717f416fa4c7d981547f2af7f163b/FLAG381face95 [2024-09-15 20:25:00,975 INFO L435 CDTParser]: Successfully deleted /storage/repos/certificate-witnesses-artifact/automizer/data/5126b06f9/9b2717f416fa4c7d981547f2af7f163b [2024-09-15 20:25:00,976 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-09-15 20:25:00,978 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-09-15 20:25:00,980 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-09-15 20:25:00,981 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-09-15 20:25:00,985 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-09-15 20:25:00,986 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness-2.1.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 15.09 08:24:59" (1/2) ... [2024-09-15 20:25:00,987 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7568749 and model type witness-2.1.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 15.09 08:25:00, skipping insertion in model container [2024-09-15 20:25:00,987 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness-2.1.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 15.09 08:24:59" (1/2) ... [2024-09-15 20:25:00,988 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@358df1ec and model type witness-2.1.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 15.09 08:25:00, skipping insertion in model container [2024-09-15 20:25:00,992 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.09 08:25:00" (2/2) ... [2024-09-15 20:25:00,993 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7568749 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 08:25:00, skipping insertion in model container [2024-09-15 20:25:00,993 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.09 08:25:00" (2/2) ... [2024-09-15 20:25:01,000 INFO L93 nessWitnessExtractor]: Found the following entries in the witness: [2024-09-15 20:25:01,001 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))) [2024-09-15 20:25:01,022 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-09-15 20:25:01,194 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] [2024-09-15 20:25:01,202 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-15 20:25:01,219 INFO L200 MainTranslator]: Completed pre-run Start Parsing Global [2024-09-15 20:25:01,264 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] [2024-09-15 20:25:01,265 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-15 20:25:01,280 INFO L204 MainTranslator]: Completed translation [2024-09-15 20:25:01,281 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 08:25:01 WrapperNode [2024-09-15 20:25:01,281 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-09-15 20:25:01,282 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-09-15 20:25:01,282 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-09-15 20:25:01,283 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-09-15 20:25:01,289 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 08:25:01" (1/1) ... [2024-09-15 20:25:01,296 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 08:25:01" (1/1) ... [2024-09-15 20:25:01,309 INFO L138 Inliner]: procedures = 13, calls = 10, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 20 [2024-09-15 20:25:01,310 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-09-15 20:25:01,312 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-09-15 20:25:01,312 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-09-15 20:25:01,312 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-09-15 20:25:01,321 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 08:25:01" (1/1) ... [2024-09-15 20:25:01,321 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 08:25:01" (1/1) ... [2024-09-15 20:25:01,327 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 08:25:01" (1/1) ... [2024-09-15 20:25:01,339 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 [2024-09-15 20:25:01,340 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 08:25:01" (1/1) ... [2024-09-15 20:25:01,341 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 08:25:01" (1/1) ... [2024-09-15 20:25:01,349 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 08:25:01" (1/1) ... [2024-09-15 20:25:01,350 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 08:25:01" (1/1) ... [2024-09-15 20:25:01,351 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 08:25:01" (1/1) ... [2024-09-15 20:25:01,355 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 08:25:01" (1/1) ... [2024-09-15 20:25:01,357 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-09-15 20:25:01,358 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-09-15 20:25:01,358 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-09-15 20:25:01,358 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-09-15 20:25:01,359 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 08:25:01" (1/1) ... [2024-09-15 20:25:01,364 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-15 20:25:01,372 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 20:25:01,387 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) [2024-09-15 20:25:01,393 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 [2024-09-15 20:25:01,438 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-09-15 20:25:01,439 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-09-15 20:25:01,440 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-09-15 20:25:01,440 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2024-09-15 20:25:01,440 INFO L130 BoogieDeclarations]: Found specification of procedure fibo [2024-09-15 20:25:01,440 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo [2024-09-15 20:25:01,505 INFO L242 CfgBuilder]: Building ICFG [2024-09-15 20:25:01,507 INFO L268 CfgBuilder]: Building CFG for each procedure with an implementation [2024-09-15 20:25:01,659 INFO L? ?]: Removed 9 outVars from TransFormulas that were not future-live. [2024-09-15 20:25:01,659 INFO L291 CfgBuilder]: Performing block encoding [2024-09-15 20:25:01,688 INFO L313 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-09-15 20:25:01,688 INFO L318 CfgBuilder]: Removed 0 assume(true) statements. [2024-09-15 20:25:01,689 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.09 08:25:01 BoogieIcfgContainer [2024-09-15 20:25:01,689 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-09-15 20:25:01,692 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-09-15 20:25:01,692 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-09-15 20:25:01,696 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-09-15 20:25:01,696 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness-2.1.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 15.09 08:24:59" (1/4) ... [2024-09-15 20:25:01,698 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@268a58fb and model type witness-2.1.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 15.09 08:25:01, skipping insertion in model container [2024-09-15 20:25:01,698 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.09 08:25:00" (2/4) ... [2024-09-15 20:25:01,698 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@268a58fb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.09 08:25:01, skipping insertion in model container [2024-09-15 20:25:01,699 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 08:25:01" (3/4) ... [2024-09-15 20:25:01,699 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@268a58fb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.09 08:25:01, skipping insertion in model container [2024-09-15 20:25:01,699 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.09 08:25:01" (4/4) ... [2024-09-15 20:25:01,701 INFO L112 eAbstractionObserver]: Analyzing ICFG fibo_5-1.c [2024-09-15 20:25:01,717 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-09-15 20:25:01,718 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2024-09-15 20:25:01,770 INFO L335 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-09-15 20:25:01,777 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;@828aa07, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-09-15 20:25:01,778 INFO L337 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2024-09-15 20:25:01,781 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) [2024-09-15 20:25:01,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2024-09-15 20:25:01,788 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 20:25:01,789 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2024-09-15 20:25:01,790 INFO L399 AbstractCegarLoop]: === Iteration 1 === Targeting fiboErr0ENSURES_VIOLATIONPOST_CONDITION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, fiboErr0ENSURES_VIOLATIONPOST_CONDITION] === [2024-09-15 20:25:01,796 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 20:25:01,798 INFO L85 PathProgramCache]: Analyzing trace with hash 65647554, now seen corresponding path program 1 times [2024-09-15 20:25:01,809 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 20:25:01,810 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1034826643] [2024-09-15 20:25:01,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 20:25:01,811 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 20:25:01,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:25:02,088 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-15 20:25:02,089 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 20:25:02,089 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1034826643] [2024-09-15 20:25:02,090 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1034826643] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-15 20:25:02,090 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-15 20:25:02,090 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-09-15 20:25:02,095 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1843868873] [2024-09-15 20:25:02,096 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-15 20:25:02,100 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-09-15 20:25:02,101 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 20:25:02,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-09-15 20:25:02,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-09-15 20:25:02,133 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) [2024-09-15 20:25:02,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 20:25:02,244 INFO L93 Difference]: Finished difference Result 23 states and 30 transitions. [2024-09-15 20:25:02,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-09-15 20:25:02,247 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 [2024-09-15 20:25:02,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 20:25:02,253 INFO L225 Difference]: With dead ends: 23 [2024-09-15 20:25:02,254 INFO L226 Difference]: Without dead ends: 21 [2024-09-15 20:25:02,255 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 [2024-09-15 20:25:02,258 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 [2024-09-15 20:25:02,259 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] [2024-09-15 20:25:02,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2024-09-15 20:25:02,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 17. [2024-09-15 20:25:02,291 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) [2024-09-15 20:25:02,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 20 transitions. [2024-09-15 20:25:02,292 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 20 transitions. Word has length 5 [2024-09-15 20:25:02,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 20:25:02,293 INFO L474 AbstractCegarLoop]: Abstraction has 17 states and 20 transitions. [2024-09-15 20:25:02,293 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) [2024-09-15 20:25:02,293 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 20 transitions. [2024-09-15 20:25:02,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2024-09-15 20:25:02,294 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 20:25:02,294 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2024-09-15 20:25:02,295 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-09-15 20:25:02,295 INFO L399 AbstractCegarLoop]: === Iteration 2 === Targeting fiboErr0ENSURES_VIOLATIONPOST_CONDITION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, fiboErr0ENSURES_VIOLATIONPOST_CONDITION] === [2024-09-15 20:25:02,296 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 20:25:02,296 INFO L85 PathProgramCache]: Analyzing trace with hash 2035074950, now seen corresponding path program 1 times [2024-09-15 20:25:02,296 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 20:25:02,296 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1126808624] [2024-09-15 20:25:02,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 20:25:02,297 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 20:25:02,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:25:02,395 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-15 20:25:02,396 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 20:25:02,396 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1126808624] [2024-09-15 20:25:02,396 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1126808624] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-15 20:25:02,396 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-15 20:25:02,398 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-09-15 20:25:02,398 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [995059103] [2024-09-15 20:25:02,398 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-15 20:25:02,399 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-15 20:25:02,399 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 20:25:02,400 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-15 20:25:02,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-15 20:25:02,400 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) [2024-09-15 20:25:02,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 20:25:02,472 INFO L93 Difference]: Finished difference Result 27 states and 31 transitions. [2024-09-15 20:25:02,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-15 20:25:02,473 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 [2024-09-15 20:25:02,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 20:25:02,474 INFO L225 Difference]: With dead ends: 27 [2024-09-15 20:25:02,474 INFO L226 Difference]: Without dead ends: 27 [2024-09-15 20:25:02,475 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 [2024-09-15 20:25:02,476 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 [2024-09-15 20:25:02,476 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] [2024-09-15 20:25:02,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2024-09-15 20:25:02,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 26. [2024-09-15 20:25:02,481 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) [2024-09-15 20:25:02,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 31 transitions. [2024-09-15 20:25:02,484 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 31 transitions. Word has length 6 [2024-09-15 20:25:02,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 20:25:02,484 INFO L474 AbstractCegarLoop]: Abstraction has 26 states and 31 transitions. [2024-09-15 20:25:02,485 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) [2024-09-15 20:25:02,485 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 31 transitions. [2024-09-15 20:25:02,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2024-09-15 20:25:02,485 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 20:25:02,485 INFO L216 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1] [2024-09-15 20:25:02,486 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-09-15 20:25:02,486 INFO L399 AbstractCegarLoop]: === Iteration 3 === Targeting fiboErr0ENSURES_VIOLATIONPOST_CONDITION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, fiboErr0ENSURES_VIOLATIONPOST_CONDITION] === [2024-09-15 20:25:02,486 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 20:25:02,487 INFO L85 PathProgramCache]: Analyzing trace with hash -254199789, now seen corresponding path program 1 times [2024-09-15 20:25:02,487 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 20:25:02,487 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1085986508] [2024-09-15 20:25:02,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 20:25:02,487 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 20:25:02,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:25:02,614 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-15 20:25:02,614 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 20:25:02,615 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1085986508] [2024-09-15 20:25:02,615 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1085986508] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-15 20:25:02,615 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1788049403] [2024-09-15 20:25:02,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 20:25:02,615 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 20:25:02,616 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 20:25:02,617 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) [2024-09-15 20:25:02,619 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-09-15 20:25:02,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:25:02,671 INFO L262 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-09-15 20:25:02,676 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 20:25:02,736 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-15 20:25:02,736 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 20:25:02,812 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-15 20:25:02,814 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1788049403] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-15 20:25:02,815 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-15 20:25:02,815 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 11 [2024-09-15 20:25:02,816 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [823378864] [2024-09-15 20:25:02,817 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-15 20:25:02,817 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-09-15 20:25:02,818 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 20:25:02,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-09-15 20:25:02,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2024-09-15 20:25:02,821 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) [2024-09-15 20:25:03,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 20:25:03,050 INFO L93 Difference]: Finished difference Result 57 states and 64 transitions. [2024-09-15 20:25:03,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-09-15 20:25:03,051 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 [2024-09-15 20:25:03,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 20:25:03,052 INFO L225 Difference]: With dead ends: 57 [2024-09-15 20:25:03,052 INFO L226 Difference]: Without dead ends: 57 [2024-09-15 20:25:03,053 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 [2024-09-15 20:25:03,053 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 [2024-09-15 20:25:03,054 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] [2024-09-15 20:25:03,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2024-09-15 20:25:03,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 53. [2024-09-15 20:25:03,069 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) [2024-09-15 20:25:03,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 64 transitions. [2024-09-15 20:25:03,073 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 64 transitions. Word has length 10 [2024-09-15 20:25:03,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 20:25:03,073 INFO L474 AbstractCegarLoop]: Abstraction has 53 states and 64 transitions. [2024-09-15 20:25:03,073 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) [2024-09-15 20:25:03,073 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 64 transitions. [2024-09-15 20:25:03,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2024-09-15 20:25:03,074 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 20:25:03,074 INFO L216 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1] [2024-09-15 20:25:03,090 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-09-15 20:25:03,274 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 [2024-09-15 20:25:03,275 INFO L399 AbstractCegarLoop]: === Iteration 4 === Targeting fiboErr0ENSURES_VIOLATIONPOST_CONDITION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, fiboErr0ENSURES_VIOLATIONPOST_CONDITION] === [2024-09-15 20:25:03,276 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 20:25:03,276 INFO L85 PathProgramCache]: Analyzing trace with hash -254987590, now seen corresponding path program 2 times [2024-09-15 20:25:03,276 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 20:25:03,276 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1571843077] [2024-09-15 20:25:03,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 20:25:03,276 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 20:25:03,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:25:03,526 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 28 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-15 20:25:03,527 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 20:25:03,527 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1571843077] [2024-09-15 20:25:03,527 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1571843077] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-15 20:25:03,527 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1957556187] [2024-09-15 20:25:03,528 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-15 20:25:03,528 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 20:25:03,528 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 20:25:03,530 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) [2024-09-15 20:25:03,532 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-09-15 20:25:03,570 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-09-15 20:25:03,570 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-15 20:25:03,572 INFO L262 TraceCheckSpWp]: Trace formula consists of 35 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-09-15 20:25:03,574 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 20:25:03,621 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2024-09-15 20:25:03,622 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-15 20:25:03,622 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1957556187] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-15 20:25:03,622 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-09-15 20:25:03,622 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [13] total 16 [2024-09-15 20:25:03,622 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1785796379] [2024-09-15 20:25:03,623 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-15 20:25:03,623 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-15 20:25:03,623 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 20:25:03,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-15 20:25:03,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2024-09-15 20:25:03,624 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) [2024-09-15 20:25:03,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 20:25:03,680 INFO L93 Difference]: Finished difference Result 56 states and 75 transitions. [2024-09-15 20:25:03,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-15 20:25:03,681 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 [2024-09-15 20:25:03,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 20:25:03,684 INFO L225 Difference]: With dead ends: 56 [2024-09-15 20:25:03,685 INFO L226 Difference]: Without dead ends: 56 [2024-09-15 20:25:03,686 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 [2024-09-15 20:25:03,687 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 [2024-09-15 20:25:03,687 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] [2024-09-15 20:25:03,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2024-09-15 20:25:03,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 53. [2024-09-15 20:25:03,698 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) [2024-09-15 20:25:03,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 64 transitions. [2024-09-15 20:25:03,703 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 64 transitions. Word has length 22 [2024-09-15 20:25:03,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 20:25:03,704 INFO L474 AbstractCegarLoop]: Abstraction has 53 states and 64 transitions. [2024-09-15 20:25:03,704 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) [2024-09-15 20:25:03,704 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 64 transitions. [2024-09-15 20:25:03,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2024-09-15 20:25:03,706 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 20:25:03,706 INFO L216 NwaCegarLoop]: trace histogram [6, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 20:25:03,724 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-09-15 20:25:03,906 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 [2024-09-15 20:25:03,907 INFO L399 AbstractCegarLoop]: === Iteration 5 === Targeting fiboErr0ENSURES_VIOLATIONPOST_CONDITION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, fiboErr0ENSURES_VIOLATIONPOST_CONDITION] === [2024-09-15 20:25:03,908 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 20:25:03,908 INFO L85 PathProgramCache]: Analyzing trace with hash -2098277332, now seen corresponding path program 1 times [2024-09-15 20:25:03,908 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 20:25:03,909 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1710239912] [2024-09-15 20:25:03,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 20:25:03,909 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 20:25:03,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:25:04,024 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2024-09-15 20:25:04,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:25:04,070 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-09-15 20:25:04,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:25:04,091 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 12 proven. 3 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-09-15 20:25:04,091 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 20:25:04,091 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1710239912] [2024-09-15 20:25:04,092 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1710239912] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-15 20:25:04,092 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [134062314] [2024-09-15 20:25:04,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 20:25:04,092 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 20:25:04,093 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 20:25:04,095 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) [2024-09-15 20:25:04,097 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-09-15 20:25:04,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:25:04,145 INFO L262 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-09-15 20:25:04,147 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 20:25:04,303 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 13 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-09-15 20:25:04,305 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 20:25:04,498 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 2 proven. 43 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-09-15 20:25:04,498 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [134062314] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-15 20:25:04,498 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-15 20:25:04,498 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 13, 13] total 16 [2024-09-15 20:25:04,498 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [585661137] [2024-09-15 20:25:04,499 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-15 20:25:04,499 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-09-15 20:25:04,499 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 20:25:04,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-09-15 20:25:04,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2024-09-15 20:25:04,501 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) [2024-09-15 20:25:04,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 20:25:04,778 INFO L93 Difference]: Finished difference Result 115 states and 196 transitions. [2024-09-15 20:25:04,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-09-15 20:25:04,780 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 [2024-09-15 20:25:04,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 20:25:04,783 INFO L225 Difference]: With dead ends: 115 [2024-09-15 20:25:04,783 INFO L226 Difference]: Without dead ends: 115 [2024-09-15 20:25:04,783 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 [2024-09-15 20:25:04,784 INFO L434 NwaCegarLoop]: 19 mSDtfsCounter, 81 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 218 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 269 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 218 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-15 20:25:04,787 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [82 Valid, 81 Invalid, 269 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 218 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-15 20:25:04,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2024-09-15 20:25:04,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 100. [2024-09-15 20:25:04,816 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) [2024-09-15 20:25:04,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 163 transitions. [2024-09-15 20:25:04,822 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 163 transitions. Word has length 30 [2024-09-15 20:25:04,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 20:25:04,822 INFO L474 AbstractCegarLoop]: Abstraction has 100 states and 163 transitions. [2024-09-15 20:25:04,823 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) [2024-09-15 20:25:04,823 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 163 transitions. [2024-09-15 20:25:04,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2024-09-15 20:25:04,825 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 20:25:04,825 INFO L216 NwaCegarLoop]: trace histogram [6, 5, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 20:25:04,843 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-09-15 20:25:05,025 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 [2024-09-15 20:25:05,026 INFO L399 AbstractCegarLoop]: === Iteration 6 === Targeting fiboErr0ENSURES_VIOLATIONPOST_CONDITION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, fiboErr0ENSURES_VIOLATIONPOST_CONDITION] === [2024-09-15 20:25:05,026 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 20:25:05,026 INFO L85 PathProgramCache]: Analyzing trace with hash -2106411776, now seen corresponding path program 1 times [2024-09-15 20:25:05,027 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 20:25:05,027 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1621946881] [2024-09-15 20:25:05,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 20:25:05,027 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 20:25:05,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:25:05,348 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2024-09-15 20:25:05,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:25:05,377 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2024-09-15 20:25:05,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:25:05,402 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 1 proven. 47 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-09-15 20:25:05,403 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 20:25:05,403 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1621946881] [2024-09-15 20:25:05,403 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1621946881] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-15 20:25:05,403 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1643591213] [2024-09-15 20:25:05,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 20:25:05,403 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 20:25:05,404 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 20:25:05,406 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) [2024-09-15 20:25:05,409 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-09-15 20:25:05,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:25:05,450 INFO L262 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 27 conjuncts are in the unsatisfiable core [2024-09-15 20:25:05,452 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 20:25:05,534 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 1 proven. 47 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-09-15 20:25:05,534 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 20:25:06,390 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-09-15 20:25:06,391 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1643591213] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-15 20:25:06,391 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-15 20:25:06,391 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 25 [2024-09-15 20:25:06,391 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1963051107] [2024-09-15 20:25:06,391 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-15 20:25:06,392 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-09-15 20:25:06,392 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 20:25:06,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-09-15 20:25:06,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=573, Unknown=0, NotChecked=0, Total=650 [2024-09-15 20:25:06,394 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) [2024-09-15 20:25:08,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 20:25:08,106 INFO L93 Difference]: Finished difference Result 159 states and 266 transitions. [2024-09-15 20:25:08,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2024-09-15 20:25:08,107 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 [2024-09-15 20:25:08,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 20:25:08,109 INFO L225 Difference]: With dead ends: 159 [2024-09-15 20:25:08,109 INFO L226 Difference]: Without dead ends: 157 [2024-09-15 20:25:08,110 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 640 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=360, Invalid=2832, Unknown=0, NotChecked=0, Total=3192 [2024-09-15 20:25:08,111 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 [2024-09-15 20:25:08,111 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] [2024-09-15 20:25:08,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2024-09-15 20:25:08,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 138. [2024-09-15 20:25:08,132 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) [2024-09-15 20:25:08,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 240 transitions. [2024-09-15 20:25:08,134 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 240 transitions. Word has length 31 [2024-09-15 20:25:08,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 20:25:08,135 INFO L474 AbstractCegarLoop]: Abstraction has 138 states and 240 transitions. [2024-09-15 20:25:08,135 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) [2024-09-15 20:25:08,135 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 240 transitions. [2024-09-15 20:25:08,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2024-09-15 20:25:08,136 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 20:25:08,137 INFO L216 NwaCegarLoop]: trace histogram [6, 6, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 20:25:08,155 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-09-15 20:25:08,340 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 [2024-09-15 20:25:08,341 INFO L399 AbstractCegarLoop]: === Iteration 7 === Targeting fiboErr0ENSURES_VIOLATIONPOST_CONDITION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, fiboErr0ENSURES_VIOLATIONPOST_CONDITION] === [2024-09-15 20:25:08,341 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 20:25:08,341 INFO L85 PathProgramCache]: Analyzing trace with hash -851368470, now seen corresponding path program 1 times [2024-09-15 20:25:08,341 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 20:25:08,341 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [943585926] [2024-09-15 20:25:08,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 20:25:08,342 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 20:25:08,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:25:08,462 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2024-09-15 20:25:08,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:25:08,468 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2024-09-15 20:25:08,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:25:08,493 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 28 proven. 24 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-09-15 20:25:08,494 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 20:25:08,494 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [943585926] [2024-09-15 20:25:08,494 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [943585926] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-15 20:25:08,494 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [232961417] [2024-09-15 20:25:08,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 20:25:08,495 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 20:25:08,495 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 20:25:08,497 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) [2024-09-15 20:25:08,498 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-09-15 20:25:08,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:25:08,538 INFO L262 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-09-15 20:25:08,540 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 20:25:08,588 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 30 proven. 24 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-09-15 20:25:08,590 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 20:25:08,727 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 30 proven. 24 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-09-15 20:25:08,728 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [232961417] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-15 20:25:08,728 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-15 20:25:08,728 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 15 [2024-09-15 20:25:08,728 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1803969444] [2024-09-15 20:25:08,728 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-15 20:25:08,729 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-09-15 20:25:08,729 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 20:25:08,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-09-15 20:25:08,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2024-09-15 20:25:08,731 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) [2024-09-15 20:25:09,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 20:25:09,013 INFO L93 Difference]: Finished difference Result 86 states and 100 transitions. [2024-09-15 20:25:09,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-09-15 20:25:09,014 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 [2024-09-15 20:25:09,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 20:25:09,015 INFO L225 Difference]: With dead ends: 86 [2024-09-15 20:25:09,015 INFO L226 Difference]: Without dead ends: 86 [2024-09-15 20:25:09,016 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 59 SyntacticMatches, 10 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=219, Invalid=537, Unknown=0, NotChecked=0, Total=756 [2024-09-15 20:25:09,017 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 [2024-09-15 20:25:09,017 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] [2024-09-15 20:25:09,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2024-09-15 20:25:09,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 79. [2024-09-15 20:25:09,022 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) [2024-09-15 20:25:09,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 96 transitions. [2024-09-15 20:25:09,023 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 96 transitions. Word has length 32 [2024-09-15 20:25:09,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 20:25:09,024 INFO L474 AbstractCegarLoop]: Abstraction has 79 states and 96 transitions. [2024-09-15 20:25:09,024 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) [2024-09-15 20:25:09,024 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 96 transitions. [2024-09-15 20:25:09,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2024-09-15 20:25:09,025 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 20:25:09,026 INFO L216 NwaCegarLoop]: trace histogram [9, 8, 7, 7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 20:25:09,043 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-09-15 20:25:09,226 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 [2024-09-15 20:25:09,227 INFO L399 AbstractCegarLoop]: === Iteration 8 === Targeting fiboErr0ENSURES_VIOLATIONPOST_CONDITION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, fiboErr0ENSURES_VIOLATIONPOST_CONDITION] === [2024-09-15 20:25:09,227 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 20:25:09,227 INFO L85 PathProgramCache]: Analyzing trace with hash 1641789625, now seen corresponding path program 2 times [2024-09-15 20:25:09,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 20:25:09,228 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [629793820] [2024-09-15 20:25:09,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 20:25:09,228 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 20:25:09,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:25:09,396 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2024-09-15 20:25:09,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:25:09,400 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2024-09-15 20:25:09,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:25:09,416 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 80 proven. 35 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-09-15 20:25:09,416 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 20:25:09,417 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [629793820] [2024-09-15 20:25:09,417 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [629793820] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-15 20:25:09,417 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1117479990] [2024-09-15 20:25:09,417 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-15 20:25:09,417 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 20:25:09,417 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 20:25:09,420 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) [2024-09-15 20:25:09,422 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-09-15 20:25:09,470 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-15 20:25:09,470 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-15 20:25:09,471 INFO L262 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-09-15 20:25:09,473 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 20:25:09,537 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 111 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2024-09-15 20:25:09,537 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-15 20:25:09,538 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1117479990] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-15 20:25:09,538 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-09-15 20:25:09,538 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [14] total 16 [2024-09-15 20:25:09,538 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2042497496] [2024-09-15 20:25:09,538 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-15 20:25:09,539 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-09-15 20:25:09,539 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 20:25:09,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-09-15 20:25:09,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2024-09-15 20:25:09,540 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) [2024-09-15 20:25:09,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 20:25:09,749 INFO L93 Difference]: Finished difference Result 55 states and 58 transitions. [2024-09-15 20:25:09,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-09-15 20:25:09,750 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 [2024-09-15 20:25:09,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 20:25:09,750 INFO L225 Difference]: With dead ends: 55 [2024-09-15 20:25:09,751 INFO L226 Difference]: Without dead ends: 54 [2024-09-15 20:25:09,751 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 [2024-09-15 20:25:09,752 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 [2024-09-15 20:25:09,752 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] [2024-09-15 20:25:09,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2024-09-15 20:25:09,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 52. [2024-09-15 20:25:09,761 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) [2024-09-15 20:25:09,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 56 transitions. [2024-09-15 20:25:09,761 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 56 transitions. Word has length 43 [2024-09-15 20:25:09,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 20:25:09,762 INFO L474 AbstractCegarLoop]: Abstraction has 52 states and 56 transitions. [2024-09-15 20:25:09,762 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) [2024-09-15 20:25:09,762 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 56 transitions. [2024-09-15 20:25:09,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2024-09-15 20:25:09,763 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 20:25:09,763 INFO L216 NwaCegarLoop]: trace histogram [7, 6, 4, 4, 4, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1] [2024-09-15 20:25:09,784 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-09-15 20:25:09,963 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 [2024-09-15 20:25:09,964 INFO L399 AbstractCegarLoop]: === Iteration 9 === Targeting fiboErr0ENSURES_VIOLATIONPOST_CONDITION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, fiboErr0ENSURES_VIOLATIONPOST_CONDITION] === [2024-09-15 20:25:09,964 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 20:25:09,965 INFO L85 PathProgramCache]: Analyzing trace with hash 771033264, now seen corresponding path program 3 times [2024-09-15 20:25:09,965 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 20:25:09,965 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [573459517] [2024-09-15 20:25:09,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 20:25:09,965 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 20:25:09,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:25:10,173 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2024-09-15 20:25:10,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:25:10,252 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-15 20:25:10,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:25:10,266 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-15 20:25:10,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:25:10,290 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2024-09-15 20:25:10,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:25:10,303 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 2 proven. 59 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-09-15 20:25:10,303 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 20:25:10,303 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [573459517] [2024-09-15 20:25:10,303 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [573459517] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-15 20:25:10,304 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1828552335] [2024-09-15 20:25:10,304 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-15 20:25:10,304 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 20:25:10,304 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 20:25:10,306 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) [2024-09-15 20:25:10,308 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-09-15 20:25:10,356 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2024-09-15 20:25:10,356 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-15 20:25:10,357 INFO L262 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 31 conjuncts are in the unsatisfiable core [2024-09-15 20:25:10,359 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 20:25:10,425 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 2 proven. 59 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-09-15 20:25:10,426 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 20:25:10,952 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-09-15 20:25:10,952 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1828552335] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-15 20:25:10,952 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-15 20:25:10,953 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 24 [2024-09-15 20:25:10,953 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1170128402] [2024-09-15 20:25:10,953 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-15 20:25:10,953 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-09-15 20:25:10,954 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 20:25:10,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-09-15 20:25:10,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=532, Unknown=0, NotChecked=0, Total=600 [2024-09-15 20:25:10,955 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) [2024-09-15 20:25:11,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 20:25:11,375 INFO L93 Difference]: Finished difference Result 52 states and 54 transitions. [2024-09-15 20:25:11,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-09-15 20:25:11,376 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 [2024-09-15 20:25:11,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 20:25:11,377 INFO L225 Difference]: With dead ends: 52 [2024-09-15 20:25:11,377 INFO L226 Difference]: Without dead ends: 52 [2024-09-15 20:25:11,377 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 [2024-09-15 20:25:11,378 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 [2024-09-15 20:25:11,378 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] [2024-09-15 20:25:11,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2024-09-15 20:25:11,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2024-09-15 20:25:11,381 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) [2024-09-15 20:25:11,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 54 transitions. [2024-09-15 20:25:11,382 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 54 transitions. Word has length 41 [2024-09-15 20:25:11,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 20:25:11,383 INFO L474 AbstractCegarLoop]: Abstraction has 52 states and 54 transitions. [2024-09-15 20:25:11,383 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) [2024-09-15 20:25:11,383 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 54 transitions. [2024-09-15 20:25:11,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2024-09-15 20:25:11,385 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 20:25:11,385 INFO L216 NwaCegarLoop]: trace histogram [15, 14, 12, 7, 7, 7, 7, 7, 7, 7, 5, 3, 1, 1, 1] [2024-09-15 20:25:11,402 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-09-15 20:25:11,589 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 [2024-09-15 20:25:11,590 INFO L399 AbstractCegarLoop]: === Iteration 10 === Targeting fiboErr0ENSURES_VIOLATIONPOST_CONDITION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, fiboErr0ENSURES_VIOLATIONPOST_CONDITION] === [2024-09-15 20:25:11,590 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 20:25:11,590 INFO L85 PathProgramCache]: Analyzing trace with hash -1240694291, now seen corresponding path program 4 times [2024-09-15 20:25:11,590 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 20:25:11,590 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1191119724] [2024-09-15 20:25:11,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 20:25:11,590 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 20:25:11,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:25:12,061 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-15 20:25:12,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:25:12,184 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-15 20:25:12,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:25:12,270 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-15 20:25:12,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:25:12,319 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-15 20:25:12,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:25:12,328 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-15 20:25:12,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:25:12,357 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-09-15 20:25:12,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:25:12,367 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2024-09-15 20:25:12,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:25:12,392 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-15 20:25:12,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:25:12,400 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-15 20:25:12,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:25:12,413 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2024-09-15 20:25:12,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:25:12,463 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-15 20:25:12,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:25:12,488 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-15 20:25:12,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:25:12,497 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-15 20:25:12,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:25:12,507 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-09-15 20:25:12,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:25:12,518 INFO L134 CoverageAnalysis]: Checked inductivity of 556 backedges. 0 proven. 216 refuted. 0 times theorem prover too weak. 340 trivial. 0 not checked. [2024-09-15 20:25:12,518 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 20:25:12,518 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1191119724] [2024-09-15 20:25:12,518 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1191119724] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-15 20:25:12,518 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [467848695] [2024-09-15 20:25:12,519 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-15 20:25:12,519 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 20:25:12,519 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 20:25:12,521 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) [2024-09-15 20:25:12,522 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-09-15 20:25:12,591 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-15 20:25:12,591 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-15 20:25:12,593 INFO L262 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 70 conjuncts are in the unsatisfiable core [2024-09-15 20:25:12,609 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 20:25:13,011 INFO L134 CoverageAnalysis]: Checked inductivity of 556 backedges. 29 proven. 292 refuted. 0 times theorem prover too weak. 235 trivial. 0 not checked. [2024-09-15 20:25:13,011 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 20:25:14,070 INFO L134 CoverageAnalysis]: Checked inductivity of 556 backedges. 25 proven. 318 refuted. 0 times theorem prover too weak. 213 trivial. 0 not checked. [2024-09-15 20:25:14,070 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [467848695] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-15 20:25:14,070 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-15 20:25:14,071 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 21, 25] total 40 [2024-09-15 20:25:14,071 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1632827595] [2024-09-15 20:25:14,071 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-15 20:25:14,072 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2024-09-15 20:25:14,072 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 20:25:14,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2024-09-15 20:25:14,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=1492, Unknown=0, NotChecked=0, Total=1640 [2024-09-15 20:25:14,073 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) [2024-09-15 20:25:14,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 20:25:14,696 INFO L93 Difference]: Finished difference Result 59 states and 62 transitions. [2024-09-15 20:25:14,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-09-15 20:25:14,697 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 [2024-09-15 20:25:14,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 20:25:14,698 INFO L225 Difference]: With dead ends: 59 [2024-09-15 20:25:14,698 INFO L226 Difference]: Without dead ends: 59 [2024-09-15 20:25:14,699 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 [2024-09-15 20:25:14,700 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 [2024-09-15 20:25:14,700 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] [2024-09-15 20:25:14,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2024-09-15 20:25:14,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 51. [2024-09-15 20:25:14,708 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) [2024-09-15 20:25:14,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 53 transitions. [2024-09-15 20:25:14,708 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 53 transitions. Word has length 101 [2024-09-15 20:25:14,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 20:25:14,709 INFO L474 AbstractCegarLoop]: Abstraction has 51 states and 53 transitions. [2024-09-15 20:25:14,709 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) [2024-09-15 20:25:14,709 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 53 transitions. [2024-09-15 20:25:14,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2024-09-15 20:25:14,711 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 20:25:14,711 INFO L216 NwaCegarLoop]: trace histogram [15, 15, 12, 7, 7, 7, 7, 7, 7, 7, 5, 3, 1, 1, 1, 1, 1, 1] [2024-09-15 20:25:14,730 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-09-15 20:25:14,911 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 [2024-09-15 20:25:14,912 INFO L399 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, fiboErr0ENSURES_VIOLATIONPOST_CONDITION] === [2024-09-15 20:25:14,912 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 20:25:14,912 INFO L85 PathProgramCache]: Analyzing trace with hash -151965584, now seen corresponding path program 1 times [2024-09-15 20:25:14,912 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 20:25:14,913 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1285116502] [2024-09-15 20:25:14,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 20:25:14,913 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 20:25:14,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:25:15,311 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-09-15 20:25:15,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:25:15,546 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-15 20:25:15,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:25:15,659 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-15 20:25:15,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:25:15,730 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-15 20:25:15,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:25:15,776 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-15 20:25:15,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:25:15,784 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-15 20:25:15,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:25:15,804 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-09-15 20:25:15,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:25:15,812 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2024-09-15 20:25:15,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:25:15,835 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-15 20:25:15,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:25:15,843 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-15 20:25:15,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:25:15,853 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2024-09-15 20:25:15,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:25:15,913 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-15 20:25:15,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:25:15,938 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-15 20:25:15,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:25:15,948 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-15 20:25:15,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:25:15,958 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-09-15 20:25:15,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:25:15,968 INFO L134 CoverageAnalysis]: Checked inductivity of 570 backedges. 0 proven. 185 refuted. 0 times theorem prover too weak. 385 trivial. 0 not checked. [2024-09-15 20:25:15,969 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 20:25:15,969 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1285116502] [2024-09-15 20:25:15,969 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1285116502] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-15 20:25:15,969 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1872894374] [2024-09-15 20:25:15,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 20:25:15,970 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 20:25:15,970 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 20:25:15,971 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) [2024-09-15 20:25:15,974 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-09-15 20:25:16,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:25:16,047 INFO L262 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 64 conjuncts are in the unsatisfiable core [2024-09-15 20:25:16,049 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 20:25:16,255 INFO L134 CoverageAnalysis]: Checked inductivity of 570 backedges. 7 proven. 200 refuted. 0 times theorem prover too weak. 363 trivial. 0 not checked. [2024-09-15 20:25:16,256 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 20:25:16,797 INFO L134 CoverageAnalysis]: Checked inductivity of 570 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 556 trivial. 0 not checked. [2024-09-15 20:25:16,797 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1872894374] provided 1 perfect and 1 imperfect interpolant sequences [2024-09-15 20:25:16,798 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-09-15 20:25:16,798 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [16, 17] total 23 [2024-09-15 20:25:16,798 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [144840229] [2024-09-15 20:25:16,798 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-15 20:25:16,798 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-09-15 20:25:16,798 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 20:25:16,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-09-15 20:25:16,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=453, Unknown=0, NotChecked=0, Total=506 [2024-09-15 20:25:16,799 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) [2024-09-15 20:25:16,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 20:25:16,846 INFO L93 Difference]: Finished difference Result 49 states and 51 transitions. [2024-09-15 20:25:16,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-09-15 20:25:16,846 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 [2024-09-15 20:25:16,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 20:25:16,847 INFO L225 Difference]: With dead ends: 49 [2024-09-15 20:25:16,847 INFO L226 Difference]: Without dead ends: 0 [2024-09-15 20:25:16,847 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 273 GetRequests, 249 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=61, Invalid=539, Unknown=0, NotChecked=0, Total=600 [2024-09-15 20:25:16,848 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 [2024-09-15 20:25:16,848 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] [2024-09-15 20:25:16,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2024-09-15 20:25:16,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2024-09-15 20:25:16,848 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) [2024-09-15 20:25:16,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2024-09-15 20:25:16,849 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 105 [2024-09-15 20:25:16,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 20:25:16,849 INFO L474 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2024-09-15 20:25:16,849 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) [2024-09-15 20:25:16,849 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2024-09-15 20:25:16,850 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2024-09-15 20:25:16,852 INFO L785 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 2 remaining) [2024-09-15 20:25:16,853 INFO L785 garLoopResultBuilder]: Registering result SAFE for location fiboErr0ENSURES_VIOLATIONPOST_CONDITION (0 of 2 remaining) [2024-09-15 20:25:16,872 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-09-15 20:25:17,053 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 [2024-09-15 20:25:17,056 INFO L408 BasicCegarLoop]: Path program histogram: [4, 2, 1, 1, 1, 1, 1] [2024-09-15 20:25:17,058 INFO L165 ceAbstractionStarter]: Computing trace abstraction results [2024-09-15 20:25:17,060 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 15.09 08:25:17 BoogieIcfgContainer [2024-09-15 20:25:17,060 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2024-09-15 20:25:17,060 INFO L158 Benchmark]: Toolchain (without parser) took 16083.17ms. Allocated memory was 62.9MB in the beginning and 247.5MB in the end (delta: 184.5MB). Free memory was 29.6MB in the beginning and 210.8MB in the end (delta: -181.1MB). Peak memory consumption was 3.9MB. Max. memory is 16.1GB. [2024-09-15 20:25:17,061 INFO L158 Benchmark]: Witness Parser took 0.21ms. Allocated memory is still 46.1MB. Free memory was 25.1MB in the beginning and 25.0MB in the end (delta: 52.5kB). There was no memory consumed. Max. memory is 16.1GB. [2024-09-15 20:25:17,061 INFO L158 Benchmark]: CDTParser took 0.91ms. Allocated memory is still 46.1MB. Free memory is still 23.1MB. There was no memory consumed. Max. memory is 16.1GB. [2024-09-15 20:25:17,061 INFO L158 Benchmark]: CACSL2BoogieTranslator took 301.44ms. Allocated memory is still 62.9MB. Free memory was 29.5MB in the beginning and 32.6MB in the end (delta: -3.2MB). Peak memory consumption was 7.1MB. Max. memory is 16.1GB. [2024-09-15 20:25:17,061 INFO L158 Benchmark]: Boogie Procedure Inliner took 28.36ms. Allocated memory is still 62.9MB. Free memory was 32.6MB in the beginning and 31.2MB in the end (delta: 1.5MB). There was no memory consumed. Max. memory is 16.1GB. [2024-09-15 20:25:17,061 INFO L158 Benchmark]: Boogie Preprocessor took 45.13ms. Allocated memory is still 62.9MB. Free memory was 31.2MB in the beginning and 29.7MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-09-15 20:25:17,062 INFO L158 Benchmark]: RCFGBuilder took 331.41ms. Allocated memory was 62.9MB in the beginning and 77.6MB in the end (delta: 14.7MB). Free memory was 29.7MB in the beginning and 49.4MB in the end (delta: -19.7MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2024-09-15 20:25:17,062 INFO L158 Benchmark]: TraceAbstraction took 15368.06ms. Allocated memory was 77.6MB in the beginning and 247.5MB in the end (delta: 169.9MB). Free memory was 48.7MB in the beginning and 210.8MB in the end (delta: -162.0MB). Peak memory consumption was 7.6MB. Max. memory is 16.1GB. [2024-09-15 20:25:17,064 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Witness Parser took 0.21ms. Allocated memory is still 46.1MB. Free memory was 25.1MB in the beginning and 25.0MB in the end (delta: 52.5kB). There was no memory consumed. Max. memory is 16.1GB. * CDTParser took 0.91ms. Allocated memory is still 46.1MB. Free memory is still 23.1MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 301.44ms. Allocated memory is still 62.9MB. Free memory was 29.5MB in the beginning and 32.6MB in the end (delta: -3.2MB). Peak memory consumption was 7.1MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 28.36ms. Allocated memory is still 62.9MB. Free memory was 32.6MB in the beginning and 31.2MB in the end (delta: 1.5MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 45.13ms. Allocated memory is still 62.9MB. Free memory was 31.2MB in the beginning and 29.7MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 331.41ms. Allocated memory was 62.9MB in the beginning and 77.6MB in the end (delta: 14.7MB). Free memory was 29.7MB in the beginning and 49.4MB in the end (delta: -19.7MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * TraceAbstraction took 15368.06ms. Allocated memory was 77.6MB in the beginning and 247.5MB in the end (delta: 169.9MB). Free memory was 48.7MB in the beginning and 210.8MB in the end (delta: -162.0MB). Peak memory consumption was 7.6MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 29]: a call to reach_error is unreachable For all program executions holds that a call to reach_error is unreachable at this location - PositiveResult [Line: 7]: procedure postcondition always holds For all program executions holds that procedure postcondition always holds at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 18 locations, 2 error locations. Started 1 CEGAR loops. OverallTime: 15.3s, OverallIterations: 11, TraceHistogramMax: 15, PathProgramHistogramMax: 4, EmptinessCheckTime: 0.0s, AutomataDifference: 4.2s, 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, 1.8s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 610 mSDsCounter, 343 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 3267 IncrementalHoareTripleChecker+Invalid, 3610 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 343 mSolverCounterUnsat, 161 mSDtfsCounter, 3267 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1087 GetRequests, 799 SyntacticMatches, 22 SemanticMatches, 266 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1932 ImplicationChecksByTransitivity, 4.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=138occurred in iteration=6, InterpolantAutomatonStates: 173, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 11 MinimizatonAttempts, 63 StatesRemovedByMinimization, 9 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 8.3s 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! [2024-09-15 20:25:17,094 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